Add the pdf plugin's source in src\pdf.

I've updated gypi files to not use internal_pdf variable anymore, which was brought in from pdf repo's supplemental.gypi.

R=thestig@chromium.org
TBR=darin

Review URL: https://codereview.chromium.org/294793003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@271531 0039d316-1c4b-4281-b951-d872f2087c98

build/all.gyp

@@ -1103,6 +1103,7 @@
                 '../ipc/ipc.gyp:ipc_tests',
                 '../media/media.gyp:media_unittests',
                 '../net/net.gyp:net_unittests_run',
+                '../pdf/pdf.gyp:pdf',
                 '../printing/printing.gyp:printing_unittests',
                 '../remoting/remoting.gyp:remoting_webapp',
                 '../sql/sql.gyp:sql_unittests',
@@ -1114,11 +1115,6 @@
                 '../url/url.gyp:url_unittests',
               ],
               'conditions': [
-                ['internal_pdf', {
-                  'dependencies': [
-                    '../pdf/pdf.gyp:pdf',
-                  ],
-                }], # internal_pdf
                 ['target_arch=="ia32"', {
                   'dependencies': [
                     '../chrome/chrome.gyp:crash_service_win64',

build/common.gypi

@@ -1275,9 +1275,6 @@
     # Build libpeerconnection as a static library by default.
     'libpeer_target_type%': 'static_library',
 
-    # Set to 1 to compile with the built in pdf viewer.
-    'internal_pdf%': 0,
-
     # Set to 1 to compile with the OpenGL ES 2.0 conformance tests.
     'internal_gles2_conform_tests%': 0,
 

chrome/chrome_dll.gypi

@@ -282,6 +282,9 @@
                 'app/chrome_main_mac.mm',
                 'app/chrome_main_mac.h',
               ],
+              'dependencies': [
+                '../pdf/pdf.gyp:pdf',
+              ],
               'include_dirs': [
                 '<(grit_out_dir)',
               ],
@@ -319,11 +322,6 @@
                     '../components/components.gyp:breakpad_stubs',
                   ],
                 }],  # mac_breakpad_compiled_in
-                ['internal_pdf', {
-                  'dependencies': [
-                    '../pdf/pdf.gyp:pdf',
-                  ],
-                }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions

chrome/chrome_dll_bundle.gypi

@@ -76,6 +76,7 @@
     # Bring in pdfsqueeze and run it on all pdfs
     '../build/temp_gyp/pdfsqueeze.gyp:pdfsqueeze',
     '../crypto/crypto.gyp:crypto',
+    '../pdf/pdf.gyp:pdf',
     # On Mac, Flash gets put into the framework, so we need this
     # dependency here. flash_player.gyp will copy the Flash bundle
     # into PRODUCT_DIR.
@@ -146,13 +147,10 @@
     },
     {
       'destination': '<(PRODUCT_DIR)/$(CONTENTS_FOLDER_PATH)/Internet Plug-Ins',
-      'files': [],
+      'files': [
+        '<(PRODUCT_DIR)/PDF.plugin',
+      ],
       'conditions': [
-        ['internal_pdf', {
-          'files': [
-            '<(PRODUCT_DIR)/PDF.plugin',
-          ],
-        }],
         ['disable_nacl!=1', {
           'files': [
             '<(PRODUCT_DIR)/ppGoogleNaClPluginChrome.plugin',
@@ -278,11 +276,6 @@
         },
       ],
     }],  # mac_keystone
-    ['internal_pdf', {
-      'dependencies': [
-        '../pdf/pdf.gyp:pdf',
-      ],
-    }],
     ['debug_devtools==1', {
       'postbuilds': [{
         'postbuild_name': 'Copy inspector files',

chrome/chrome_exe.gypi

@@ -368,7 +368,7 @@
                          '--breakpad=0',
                          '--keystone=<(mac_keystone)',
                          '--scm=1',
-                         '--pdf=<(internal_pdf)',
+                         '--pdf=1',
                          '--bundle_id=<(mac_bundle_id)'],
             },
             {
@@ -430,23 +430,17 @@
             # chrome/app/theme/google_chrome/BRANDING have the short name
             # "chrome" etc.; should we try to extract from there instead?
 
-            # On Mac, this is done in chrome_dll.gypi.
-            ['internal_pdf', {
+            # CrOS does this in a separate build step.
+            ['OS=="linux" and chromeos==0 and linux_dump_symbols==1', {
               'dependencies': [
-                '../pdf/pdf.gyp:pdf',
+                '../pdf/pdf.gyp:pdf_linux_symbols',
               ],
-              'conditions': [
-                # CrOS does this in a separate build step.
-                ['OS=="linux" and chromeos==0 and linux_dump_symbols==1', {
-                  'dependencies': [
-                    '../pdf/pdf.gyp:pdf_linux_symbols',
-                  ],
-                }], # OS=="linux" and chromeos==0 and linux_dump_symbols==1
-              ],
-            }], # internal_pdf
+            }], # OS=="linux" and chromeos==0 and linux_dump_symbols==1
           ],
           'dependencies': [
             '../components/components.gyp:startup_metric_utils',
+            # On Mac, this is done in chrome_dll.gypi.
+            '../pdf/pdf.gyp:pdf',
             'chrome_resources.gyp:packed_extra_resources',
             'chrome_resources.gyp:packed_resources',
             # Copy Flash Player files to PRODUCT_DIR if applicable. Let the .gyp

chrome/chrome_installer.gypi

@@ -495,6 +495,7 @@
           '<(PRODUCT_DIR)/chrome',
           '<(PRODUCT_DIR)/chrome_sandbox',
           '<(PRODUCT_DIR)/libffmpegsumo.so',
+          '<(PRODUCT_DIR)/libpdf.so',
           '<(PRODUCT_DIR)/libppGoogleNaClPluginChrome.so',
           '<(PRODUCT_DIR)/xdg-mime',
           '<(PRODUCT_DIR)/xdg-settings',
@@ -541,11 +542,6 @@
             'deb_arch': 'arm',
             'rpm_arch': 'arm',
           }],
-          ['internal_pdf', {
-            'packaging_files_binaries': [
-              '<(PRODUCT_DIR)/libpdf.so',
-            ],
-          }],
           ['libpeer_target_type!="static_library"', {
             'packaging_files_binaries': [
               '<(PRODUCT_DIR)/lib/libpeerconnection.so',

chrome/chrome_tests.gypi

@@ -1770,11 +1770,6 @@
             ['exclude', '^browser/captive_portal/'],
           ],
         }],
-        ['internal_pdf', {
-          'dependencies': [
-            '../pdf/pdf.gyp:pdf',
-          ],
-        }],
         ['enable_webrtc==0', {
           'sources!': [
             'browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc',

pdf/DEPS

@@ -0,0 +1,5 @@
+include_rules = [
+  "+net",
+  "+ppapi",
+  "+third_party/pdfium/fpdfsdk/include",
+]

pdf/Info.plist

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>English</string>
+	<key>CFBundleExecutable</key>
+	<string>${EXECUTABLE_NAME}</string>
+	<key>CFBundleIdentifier</key>
+	<string>org.chromium.pdf_plugin</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>${PRODUCT_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>BRPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>1.0</string>
+	<key>CFPlugInDynamicRegisterFunction</key>
+	<string></string>
+	<key>CFPlugInDynamicRegistration</key>
+	<string>NO</string>
+	<key>WebPluginDescription</key>
+	<string>Chrome PDF Viewer</string>
+	<key>WebPluginMIMETypes</key>
+	<dict>
+		<key>application/pdf</key>
+		<dict>
+			<key>WebPluginExtensions</key>
+			<array>
+				<string>pdf</string>
+			</array>
+			<key>WebPluginTypeDescription</key>
+			<string>Acrobat Portable Document Format</string>
+		</dict>
+	</dict>
+	<key>WebPluginName</key>
+	<string>Chrome PDF Viewer</string>
+</dict>
+</plist>

pdf/OWNERS

@@ -0,0 +1,5 @@
+cevans@chromium.org
+gene@chromium.org
+jam@chromium.org
+raymes@chromium.org
+thestig@chromium.org

pdf/button.cc

@@ -0,0 +1,179 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/button.h"
+
+#include "base/logging.h"
+#include "pdf/draw_utils.h"
+#include "ppapi/cpp/input_event.h"
+
+namespace chrome_pdf {
+
+Button::Button()
+    : style_(BUTTON_CLICKABLE), state_(BUTTON_NORMAL), is_pressed_(false) {
+}
+
+Button::~Button() {
+}
+
+bool Button::CreateButton(uint32 id,
+                          const pp::Point& origin,
+                          bool visible,
+                          Control::Owner* owner,
+                          ButtonStyle style,
+                          const pp::ImageData& face_normal,
+                          const pp::ImageData& face_highlighted,
+                          const pp::ImageData& face_pressed) {
+  DCHECK(face_normal.size().GetArea());
+  DCHECK(face_normal.size() == face_highlighted.size());
+  DCHECK(face_normal.size() == face_pressed.size());
+
+  pp::Rect rc(origin, face_normal.size());
+  if (!Control::Create(id, rc, visible, owner))
+    return false;
+
+  style_ = style;
+
+  normal_ = face_normal;
+  highlighted_ = face_highlighted;
+  pressed_ = face_pressed;
+
+  return true;
+}
+
+
+void Button::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
+  if (!visible())
+    return;
+
+  pp::Rect draw_rc = rc.Intersect(rect());
+  if (draw_rc.IsEmpty())
+    return;
+
+  pp::Point origin = draw_rc.point();
+  draw_rc.Offset(-rect().x(), -rect().y());
+
+  AlphaBlend(GetCurrentImage(), draw_rc, image_data, origin, transparency());
+}
+
+bool Button::HandleEvent(const pp::InputEvent& event) {
+  if (!visible())
+    return false;
+
+  // Button handles mouse events only.
+  pp::MouseInputEvent mouse_event(event);
+   if (mouse_event.is_null())
+    return false;
+
+  pp::Point pt = mouse_event.GetPosition();
+  if (!rect().Contains(pt) ||
+      event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE) {
+    ChangeState(BUTTON_NORMAL, false);
+    owner()->SetEventCapture(id(), false);
+    return false;
+  }
+
+  owner()->SetCursor(id(), PP_CURSORTYPE_POINTER);
+  owner()->SetEventCapture(id(), true);
+
+  bool handled = true;
+  switch (event.GetType()) {
+    case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+      if (state_ == BUTTON_NORMAL)
+        ChangeState(BUTTON_HIGHLIGHTED, false);
+      break;
+    case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+      if (mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT) {
+        ChangeState(BUTTON_PRESSED, false);
+        is_pressed_ = true;
+      }
+      break;
+    case PP_INPUTEVENT_TYPE_MOUSEUP:
+      if (mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT &&
+          is_pressed_) {
+        OnButtonClicked();
+        is_pressed_ = false;
+      } else {
+        // Since button has not been pressed, return false to allow other
+        // controls (scrollbar) to process mouse button up.
+        return false;
+      }
+      break;
+    default:
+      handled = false;
+      break;
+  }
+
+  return handled;
+}
+
+void Button::OnEventCaptureReleased() {
+  ChangeState(BUTTON_NORMAL, false);
+}
+
+void Button::Show(bool visible, bool invalidate) {
+  // If button become invisible, remove pressed flag.
+  if (!visible)
+    is_pressed_ = false;
+  Control::Show(visible, invalidate);
+}
+
+void Button::AdjustTransparency(uint8 transparency, bool invalidate) {
+  // If button become invisible, remove pressed flag.
+  if (transparency == kTransparentAlpha)
+    is_pressed_ = false;
+  Control::AdjustTransparency(transparency, invalidate);
+}
+
+void Button::SetPressedState(bool pressed) {
+  if (style_ == BUTTON_STATE) {
+    if (IsPressed() != pressed)
+      ChangeState(pressed ? BUTTON_PRESSED_STICKY : BUTTON_NORMAL, true);
+  }
+}
+
+const pp::ImageData& Button::GetCurrentImage() {
+  switch (state_) {
+    case BUTTON_NORMAL: return normal_;
+    case BUTTON_HIGHLIGHTED: return highlighted_;
+    case BUTTON_PRESSED:
+    case BUTTON_PRESSED_STICKY: return pressed_;
+  }
+  NOTREACHED();
+  return normal_;
+}
+
+void Button::ChangeState(ButtonState new_state, bool force) {
+  if (style_ == BUTTON_STATE && !force) {
+    // If button is a state button and pressed state is sticky,
+    // user have to click on this button again to unpress it.
+    if ((state_ == BUTTON_PRESSED_STICKY && new_state != BUTTON_PRESSED_STICKY)
+        ||
+        (state_ != BUTTON_PRESSED_STICKY && new_state == BUTTON_PRESSED_STICKY))
+      return;
+  }
+
+  if (state_ != new_state) {
+    state_ = new_state;
+    owner()->Invalidate(id(), rect());
+  }
+}
+
+void Button::OnButtonClicked() {
+  switch (style_) {
+    case BUTTON_CLICKABLE:
+      ChangeState(BUTTON_HIGHLIGHTED, true);
+      owner()->OnEvent(id(), EVENT_ID_BUTTON_CLICKED, NULL);
+      break;
+    case BUTTON_STATE:
+      SetPressedState(!IsPressed());
+      owner()->OnEvent(id(), EVENT_ID_BUTTON_STATE_CHANGED, NULL);
+      break;
+    default:
+      NOTREACHED();
+  }
+}
+
+}  // namespace chrome_pdf
+

pdf/button.h

@@ -0,0 +1,71 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_BUTTON_H_
+#define PDF_BUTTON_H_
+
+#include "pdf/control.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/rect.h"
+
+namespace chrome_pdf {
+
+class Button : public Control {
+ public:
+  enum ButtonEventIds {
+    EVENT_ID_BUTTON_CLICKED,
+    EVENT_ID_BUTTON_STATE_CHANGED,
+  };
+
+  enum ButtonStyle {
+    BUTTON_CLICKABLE,
+    BUTTON_STATE
+  };
+
+  enum ButtonState {
+    BUTTON_NORMAL,
+    BUTTON_HIGHLIGHTED,
+    BUTTON_PRESSED,
+    BUTTON_PRESSED_STICKY,
+  };
+
+  Button();
+  virtual ~Button();
+  virtual bool CreateButton(uint32 id,
+                            const pp::Point& origin,
+                            bool visible,
+                            Control::Owner* delegate,
+                            ButtonStyle style,
+                            const pp::ImageData& face_normal,
+                            const pp::ImageData& face_highlighted,
+                            const pp::ImageData& face_pressed);
+
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
+  virtual bool HandleEvent(const pp::InputEvent& event);
+  virtual void OnEventCaptureReleased();
+  virtual void Show(bool visible, bool invalidate);
+  virtual void AdjustTransparency(uint8 transparency, bool invalidate);
+
+  ButtonState state() const { return state_; }
+  bool IsPressed() const { return state() == BUTTON_PRESSED_STICKY; }
+  void SetPressedState(bool pressed);
+
+ private:
+  void OnButtonClicked();
+
+  const pp::ImageData& GetCurrentImage();
+  void ChangeState(ButtonState new_state, bool force);
+
+  ButtonStyle style_;
+  ButtonState state_;
+  bool is_pressed_;
+
+  pp::ImageData normal_;
+  pp::ImageData highlighted_;
+  pp::ImageData pressed_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_BUTTON_H_

pdf/chunk_stream.cc

@@ -0,0 +1,172 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/chunk_stream.h"
+
+#define __STDC_LIMIT_MACROS
+#ifdef _WIN32
+#include <limits.h>
+#else
+#include <stdint.h>
+#endif
+
+#include <algorithm>
+
+#include "base/basictypes.h"
+
+namespace chrome_pdf {
+
+ChunkStream::ChunkStream() {
+}
+
+ChunkStream::~ChunkStream() {
+}
+
+void ChunkStream::Clear() {
+  chunks_.clear();
+  data_.clear();
+}
+
+void ChunkStream::Preallocate(size_t stream_size) {
+  data_.reserve(stream_size);
+}
+
+size_t ChunkStream::GetSize() {
+  return data_.size();
+}
+
+bool ChunkStream::WriteData(size_t offset, void* buffer, size_t size) {
+  if (SIZE_MAX - size < offset)
+    return false;
+
+  if (data_.size() < offset + size)
+    data_.resize(offset + size);
+
+  memcpy(&data_[offset], buffer, size);
+
+  if (chunks_.empty()) {
+    chunks_[offset] = size;
+    return true;
+  }
+
+  std::map<size_t, size_t>::iterator start = chunks_.upper_bound(offset);
+  if (start != chunks_.begin())
+    --start;  // start now points to the key equal or lower than offset.
+  if (start->first + start->second < offset)
+    ++start;  // start element is entirely before current chunk, skip it.
+
+  std::map<size_t, size_t>::iterator end = chunks_.upper_bound(offset + size);
+  if (start == end) {  // No chunks to merge.
+    chunks_[offset] = size;
+    return true;
+  }
+
+  --end;
+
+  size_t new_offset = std::min<size_t>(start->first, offset);
+  size_t new_size =
+      std::max<size_t>(end->first + end->second, offset + size) - new_offset;
+
+  chunks_.erase(start, ++end);
+
+  chunks_[new_offset] = new_size;
+
+  return true;
+}
+
+bool ChunkStream::ReadData(size_t offset, size_t size, void* buffer) const {
+  if (!IsRangeAvailable(offset, size))
+    return false;
+
+  memcpy(buffer, &data_[offset], size);
+  return true;
+}
+
+bool ChunkStream::GetMissedRanges(
+    size_t offset, size_t size,
+    std::vector<std::pair<size_t, size_t> >* ranges) const {
+  if (IsRangeAvailable(offset, size))
+    return false;
+
+  ranges->clear();
+  if (chunks_.empty()) {
+    ranges->push_back(std::pair<size_t, size_t>(offset, size));
+    return true;
+  }
+
+  std::map<size_t, size_t>::const_iterator start = chunks_.upper_bound(offset);
+  if (start != chunks_.begin())
+    --start;  // start now points to the key equal or lower than offset.
+  if (start->first + start->second < offset)
+    ++start;  // start element is entirely before current chunk, skip it.
+
+  std::map<size_t, size_t>::const_iterator end =
+      chunks_.upper_bound(offset + size);
+  if (start == end) {  // No data in the current range available.
+    ranges->push_back(std::pair<size_t, size_t>(offset, size));
+    return true;
+  }
+
+  size_t cur_offset = offset;
+  std::map<size_t, size_t>::const_iterator it;
+  for (it = start; it != end; ++it) {
+    if (cur_offset < it->first) {
+      size_t new_size = it->first - cur_offset;
+      ranges->push_back(std::pair<size_t, size_t>(cur_offset, new_size));
+      cur_offset = it->first + it->second;
+    } else if (cur_offset < it->first + it->second) {
+      cur_offset = it->first + it->second;
+    }
+  }
+
+  // Add last chunk.
+  if (cur_offset < offset + size)
+    ranges->push_back(std::pair<size_t, size_t>(cur_offset,
+        offset + size - cur_offset));
+
+  return true;
+}
+
+bool ChunkStream::IsRangeAvailable(size_t offset, size_t size) const {
+  if (chunks_.empty())
+    return false;
+
+  if (SIZE_MAX - size < offset)
+    return false;
+
+  std::map<size_t, size_t>::const_iterator it = chunks_.upper_bound(offset);
+  if (it == chunks_.begin())
+    return false;  // No chunks includes offset byte.
+
+  --it;  // Now it starts equal or before offset.
+  return (it->first + it->second) >= (offset + size);
+}
+
+size_t ChunkStream::GetFirstMissingByte() const {
+  if (chunks_.empty())
+    return 0;
+  std::map<size_t, size_t>::const_iterator begin = chunks_.begin();
+  return begin->first > 0 ? 0 : begin->second;
+}
+
+size_t ChunkStream::GetLastByteBefore(size_t offset) const {
+  if (chunks_.empty())
+    return 0;
+  std::map<size_t, size_t>::const_iterator it = chunks_.upper_bound(offset);
+  if (it == chunks_.begin())
+    return 0;
+  --it;
+  return it->first + it->second;
+}
+
+size_t ChunkStream::GetFirstByteAfter(size_t offset) const {
+  if (chunks_.empty())
+    return 0;
+  std::map<size_t, size_t>::const_iterator it = chunks_.upper_bound(offset);
+  if (it == chunks_.end())
+    return data_.size();
+  return it->first;
+}
+
+}  // namespace chrome_pdf

pdf/chunk_stream.h

@@ -0,0 +1,48 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_CHUNK_STREAM_H_
+#define PDF_CHUNK_STREAM_H_
+
+#include <stddef.h>
+
+#include <map>
+#include <vector>
+
+namespace chrome_pdf {
+
+// This class collects a chunks of data into one data stream. Client can check
+// if data in certain range is available, and get missing chunks of data.
+class ChunkStream {
+ public:
+  ChunkStream();
+  ~ChunkStream();
+
+  void Clear();
+
+  void Preallocate(size_t stream_size);
+  size_t GetSize();
+
+  bool WriteData(size_t offset, void* buffer, size_t size);
+  bool ReadData(size_t offset, size_t size, void* buffer) const;
+
+  // Returns vector of pairs where first is an offset, second is a size.
+  bool GetMissedRanges(size_t offset, size_t size,
+      std::vector<std::pair<size_t, size_t> >* ranges) const;
+  bool IsRangeAvailable(size_t offset, size_t size) const;
+  size_t GetFirstMissingByte() const;
+
+  size_t GetLastByteBefore(size_t offset) const;
+  size_t GetFirstByteAfter(size_t offset) const;
+
+ private:
+  std::vector<unsigned char> data_;
+
+  // Pair, first - begining of the chunk, second - size of the chunk.
+  std::map<size_t, size_t> chunks_;
+};
+
+};  // namespace chrome_pdf
+
+#endif

pdf/control.cc

@@ -0,0 +1,114 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/control.h"
+
+#include "base/logging.h"
+#include "pdf/draw_utils.h"
+
+namespace chrome_pdf {
+
+Control::Control()
+    : id_(kInvalidControlId),
+      visible_(false),
+      owner_(NULL),
+      transparency_(kOpaqueAlpha) {
+}
+
+Control::~Control() {
+}
+
+bool Control::Create(uint32 id, const pp::Rect& rc,
+                     bool visible, Owner* owner) {
+  DCHECK(owner);
+  if (owner_ || id == kInvalidControlId)
+    return false;  // Already created or id is invalid.
+  id_ = id;
+  rc_ = rc;
+  visible_ = visible;
+  owner_ = owner;
+  return true;
+}
+
+bool Control::HandleEvent(const pp::InputEvent& event) {
+  return false;
+}
+
+void Control::PaintMultipleRects(pp::ImageData* image_data,
+                                 const std::list<pp::Rect>& rects) {
+  DCHECK(rects.size() > 0);
+  if (rects.size() == 1) {
+    Paint(image_data, rects.front());
+    return;
+  }
+
+  // Some rects in the input list may overlap. To prevent double
+  // paining (causes problems with semi-transparent controls) we'll
+  // paint control into buffer image data only once and copy requested
+  // rectangles.
+  pp::ImageData buffer(owner()->GetInstance(), image_data->format(),
+                       rect().size(), false);
+  pp::Rect draw_rc = pp::Rect(image_data->size()).Intersect(rect());
+  pp::Rect ctrl_rc = pp::Rect(rect().point() - draw_rc.point(), draw_rc.size());
+  CopyImage(*image_data, draw_rc, &buffer, ctrl_rc, false);
+
+  // Temporary move control to origin (0,0) and draw it into temp buffer.
+  // Move to the original position afterward. Since this is going on temp
+  // buffer, we don't need to invalidate here.
+  pp::Rect temp = rect();
+  MoveTo(pp::Point(0, 0), false);
+  Paint(&buffer, ctrl_rc);
+  MoveTo(temp.point(), false);
+
+  std::list<pp::Rect>::const_iterator iter;
+  for (iter = rects.begin(); iter != rects.end(); ++iter) {
+    pp::Rect draw_rc = rect().Intersect(*iter);
+    if (!draw_rc.IsEmpty()) {
+      // Copy requested rect from the buffer image.
+      pp::Rect src_rc = draw_rc;
+      src_rc.Offset(-rect().x(), -rect().y());
+      CopyImage(buffer, src_rc, image_data, draw_rc, false);
+    }
+  }
+}
+
+void Control::Show(bool visible, bool invalidate) {
+  if (visible_ != visible) {
+    visible_ = visible;
+    if (invalidate)
+      owner_->Invalidate(id_, rc_);
+  }
+}
+
+void Control::AdjustTransparency(uint8 transparency, bool invalidate) {
+  if (transparency_ != transparency) {
+    transparency_ = transparency;
+    if (invalidate && visible_)
+      owner_->Invalidate(id_, rc_);
+  }
+}
+
+void Control::MoveBy(const pp::Point& offset, bool invalidate) {
+  pp::Rect old_rc = rc_;
+  rc_.Offset(offset);
+  if (invalidate && visible_) {
+    owner()->Invalidate(id(), old_rc);
+    owner()->Invalidate(id(), rect());
+  }
+}
+
+void Control::SetRect(const pp::Rect& rc, bool invalidate) {
+  pp::Rect old_rc = rc_;
+  rc_ = rc;
+  if (invalidate && visible_) {
+    owner()->Invalidate(id(), old_rc);
+    owner()->Invalidate(id(), rect());
+  }
+}
+
+void Control::MoveTo(const pp::Point& origin, bool invalidate) {
+  MoveBy(origin - rc_.point(), invalidate);
+}
+
+}  // namespace chrome_pdf

pdf/control.h

@@ -0,0 +1,77 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_CONTROL_H_
+#define PDF_CONTROL_H_
+
+#include <list>
+
+#include "base/basictypes.h"
+#include "ppapi/c/dev/pp_cursor_type_dev.h"
+#include "ppapi/cpp/rect.h"
+
+namespace pp {
+class ImageData;
+class InputEvent;
+class Instance;
+}
+
+namespace chrome_pdf {
+
+const uint32 kInvalidControlId = 0;
+
+class Control {
+ public:
+  class Owner {
+   public:
+    virtual ~Owner() {}
+    virtual void OnEvent(uint32 control_id, uint32 event_id, void* data) = 0;
+    virtual void Invalidate(uint32 control_id, const pp::Rect& rc) = 0;
+    virtual uint32 ScheduleTimer(uint32 control_id, uint32 timeout_ms) = 0;
+    virtual void SetEventCapture(uint32 control_id, bool set_capture) = 0;
+    virtual void SetCursor(uint32 control_id,
+                           PP_CursorType_Dev cursor_type) = 0;
+    virtual pp::Instance* GetInstance() = 0;
+  };
+
+  Control();
+  virtual ~Control();
+  virtual bool Create(uint32 id, const pp::Rect& rc,
+                      bool visible, Owner* owner);
+
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc) {}
+  virtual bool HandleEvent(const pp::InputEvent& event);
+  virtual void OnTimerFired(uint32 timer_id) {}
+  virtual void EventCaptureReleased() {}
+
+  // Paint control into multiple destination rects.
+  virtual void PaintMultipleRects(pp::ImageData* image_data,
+                                  const std::list<pp::Rect>& rects);
+
+  virtual void Show(bool visible, bool invalidate);
+  virtual void AdjustTransparency(uint8 transparency, bool invalidate);
+  virtual void MoveBy(const pp::Point& offset, bool invalidate);
+  virtual void SetRect(const pp::Rect& rc, bool invalidate);
+
+  void MoveTo(const pp::Point& origin, bool invalidate);
+
+  uint32 id() const { return id_; }
+  const pp::Rect& rect() const { return rc_; }
+  bool visible() const { return visible_; }
+  Owner* owner() { return owner_; }
+  uint8 transparency() const { return transparency_; }
+
+ private:
+  uint32 id_;
+  pp::Rect rc_;
+  bool visible_;
+  Owner* owner_;
+  uint8 transparency_;
+};
+
+typedef Control::Owner ControlOwner;
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_CONTROL_H_

pdf/document_loader.cc

@@ -0,0 +1,515 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/document_loader.h"
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+#include "net/http/http_util.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/cpp/url_request_info.h"
+#include "ppapi/cpp/url_response_info.h"
+
+namespace chrome_pdf {
+
+// Document below size will be downloaded in one chunk.
+const uint32 kMinFileSize = 64*1024;
+
+DocumentLoader::DocumentLoader(Client* client)
+    : client_(client), partial_document_(false), request_pending_(false),
+      current_pos_(0), current_chunk_size_(0), current_chunk_read_(0),
+      document_size_(0), header_request_(true), is_multipart_(false) {
+  loader_factory_.Initialize(this);
+}
+
+DocumentLoader::~DocumentLoader() {
+}
+
+bool DocumentLoader::Init(const pp::URLLoader& loader,
+                          const std::string& url,
+                          const std::string& headers) {
+  DCHECK(url_.empty());
+  url_ = url;
+  loader_ = loader;
+
+  std::string response_headers;
+  if (!headers.empty()) {
+    response_headers = headers;
+  } else {
+    pp::URLResponseInfo response = loader_.GetResponseInfo();
+    pp::Var headers_var = response.GetHeaders();
+
+    if (headers_var.is_string()) {
+      response_headers = headers_var.AsString();
+    }
+  }
+
+  bool accept_ranges_bytes = false;
+  bool content_encoded = false;
+  uint32 content_length = 0;
+  std::string type;
+  std::string disposition;
+  if (!response_headers.empty()) {
+    net::HttpUtil::HeadersIterator it(response_headers.begin(),
+                                      response_headers.end(), "\n");
+    while (it.GetNext()) {
+      if (LowerCaseEqualsASCII(it.name(), "content-length")) {
+        content_length = atoi(it.values().c_str());
+      } else if (LowerCaseEqualsASCII(it.name(), "accept-ranges")) {
+        accept_ranges_bytes = LowerCaseEqualsASCII(it.values(), "bytes");
+      } else if (LowerCaseEqualsASCII(it.name(), "content-encoding")) {
+        content_encoded = true;
+      } else if (LowerCaseEqualsASCII(it.name(), "content-type")) {
+        type = it.values();
+        size_t semi_colon_pos = type.find(';');
+        if (semi_colon_pos != std::string::npos) {
+          type = type.substr(0, semi_colon_pos);
+        }
+        TrimWhitespace(type, base::TRIM_ALL, &type);
+      } else if (LowerCaseEqualsASCII(it.name(), "content-disposition")) {
+        disposition = it.values();
+      }
+    }
+  }
+  if (!type.empty() &&
+      !EndsWith(type, "/pdf", false) &&
+      !EndsWith(type, ".pdf", false) &&
+      !EndsWith(type, "/x-pdf", false) &&
+      !EndsWith(type, "/*", false) &&
+      !EndsWith(type, "/acrobat", false) &&
+      !EndsWith(type, "/unknown", false) &&
+      !StartsWithASCII(url, "blob:", false)) {
+    return false;
+  }
+  if (StartsWithASCII(disposition, "attachment", false)) {
+    return false;
+  }
+
+  if (content_length > 0)
+    chunk_stream_.Preallocate(content_length);
+
+  document_size_ = content_length;
+  requests_count_ = 0;
+
+  // Document loading strategy.
+  // Following table shows the growth on the minimal request size depending
+  // on the number requests that has been made already.
+  chunk_size_table_[10] = 32*1024;
+  chunk_size_table_[20] = 64*1024;
+  chunk_size_table_[30] = 128*1024;
+  chunk_size_table_[40] = 256*1024;
+  chunk_size_table_[50] = 512*1024;
+  chunk_size_table_[60] = 1024*1024;
+  chunk_size_table_[70] = 2048*1024;
+
+  // Enable partial loading only if file size is above the threshold.
+  // It will allow avoiding latency for multiple requests.
+  if (content_length > kMinFileSize &&
+      accept_ranges_bytes &&
+      !content_encoded) {
+    LoadPartialDocument();
+  } else {
+    LoadFullDocument();
+  }
+  return true;
+}
+
+void DocumentLoader::LoadPartialDocument() {
+  partial_document_ = true;
+  // Force the main request to be cancelled, since if we're a full-frame plugin
+  // there could be other references to the loader.
+  loader_.Close();
+  loader_ = pp::URLLoader();
+  // Download file header.
+  header_request_ = true;
+  RequestData(0, std::min(GetRequestSize(), document_size_));
+}
+
+void DocumentLoader::LoadFullDocument() {
+  partial_document_ = false;
+  chunk_buffer_.clear();
+  ReadMore();
+}
+
+bool DocumentLoader::IsDocumentComplete() const {
+  if (document_size_ == 0)  // Document size unknown.
+    return false;
+  return IsDataAvailable(0, document_size_);
+}
+
+uint32 DocumentLoader::GetAvailableData() const {
+  if (document_size_ == 0) {  // If document size is unknown.
+    return current_pos_;
+  }
+
+  std::vector<std::pair<size_t, size_t> > ranges;
+  chunk_stream_.GetMissedRanges(0, document_size_, &ranges);
+  uint32 available = document_size_;
+  std::vector<std::pair<size_t, size_t> >::iterator it;
+  for (it = ranges.begin(); it != ranges.end(); ++it) {
+    available -= it->second;
+  }
+  return available;
+}
+
+void DocumentLoader::ClearPendingRequests() {
+  // The first item in the queue is pending (need to keep it in the queue).
+  if (pending_requests_.size() > 1) {
+    // Remove all elements except the first one.
+    pending_requests_.erase(++pending_requests_.begin(),
+                            pending_requests_.end());
+  }
+}
+
+bool DocumentLoader::GetBlock(uint32 position, uint32 size, void* buf) const {
+  return chunk_stream_.ReadData(position, size, buf);
+}
+
+bool DocumentLoader::IsDataAvailable(uint32 position, uint32 size) const {
+  return chunk_stream_.IsRangeAvailable(position, size);
+}
+
+void DocumentLoader::RequestData(uint32 position, uint32 size) {
+  DCHECK(partial_document_);
+
+  // We have some artefact request from
+  // PDFiumEngine::OnDocumentComplete() -> FPDFAvail_IsPageAvail after
+  // document is complete.
+  // We need this fix in PDFIum. Adding this as a work around.
+  // Bug: http://code.google.com/p/chromium/issues/detail?id=79996
+  // Test url:
+  // http://www.icann.org/en/correspondence/holtzman-to-jeffrey-02mar11-en.pdf
+  if (IsDocumentComplete())
+    return;
+
+  pending_requests_.push_back(std::pair<size_t, size_t>(position, size));
+  DownloadPendingRequests();
+}
+
+void DocumentLoader::DownloadPendingRequests() {
+  if (request_pending_ || pending_requests_.empty())
+    return;
+
+  // Remove already completed requests.
+  // By design DownloadPendingRequests() should have at least 1 request in the
+  // queue. ReadComplete() will remove the last pending comment from the queue.
+  while (pending_requests_.size() > 1) {
+    if (IsDataAvailable(pending_requests_.front().first,
+                        pending_requests_.front().second)) {
+      pending_requests_.pop_front();
+    } else {
+      break;
+    }
+  }
+
+  uint32 pos = pending_requests_.front().first;
+  uint32 size = pending_requests_.front().second;
+  if (IsDataAvailable(pos, size)) {
+    ReadComplete();
+    return;
+  }
+
+  // If current request has been partially downloaded already, split it into
+  // a few smaller requests.
+  std::vector<std::pair<size_t, size_t> > ranges;
+  chunk_stream_.GetMissedRanges(pos, size, &ranges);
+  if (ranges.size() > 0) {
+    pending_requests_.pop_front();
+    pending_requests_.insert(pending_requests_.begin(),
+                             ranges.begin(), ranges.end());
+    pos = pending_requests_.front().first;
+    size = pending_requests_.front().second;
+  }
+
+  uint32 cur_request_size = GetRequestSize();
+  // If size is less than default request, try to expand download range for
+  // more optimal download.
+  if (size < cur_request_size && partial_document_) {
+    // First, try to expand block towards the end of the file.
+    uint32 new_pos = pos;
+    uint32 new_size = cur_request_size;
+    if (pos + new_size > document_size_)
+      new_size = document_size_ - pos;
+
+    std::vector<std::pair<size_t, size_t> > ranges;
+    if (chunk_stream_.GetMissedRanges(new_pos, new_size, &ranges)) {
+      new_pos = ranges[0].first;
+      new_size = ranges[0].second;
+    }
+
+    // Second, try to expand block towards the beginning of the file.
+    if (new_size < cur_request_size) {
+      uint32 block_end = new_pos + new_size;
+      if (block_end > cur_request_size) {
+        new_pos = block_end - cur_request_size;
+      } else {
+        new_pos = 0;
+      }
+      new_size = block_end - new_pos;
+
+      if (chunk_stream_.GetMissedRanges(new_pos, new_size, &ranges)) {
+        new_pos = ranges.back().first;
+        new_size = ranges.back().second;
+      }
+    }
+    pos = new_pos;
+    size = new_size;
+  }
+
+  size_t last_byte_before = chunk_stream_.GetLastByteBefore(pos);
+  size_t first_byte_after = chunk_stream_.GetFirstByteAfter(pos + size - 1);
+  if (pos - last_byte_before < cur_request_size) {
+    size = pos + size - last_byte_before;
+    pos = last_byte_before;
+  }
+
+  if ((pos + size < first_byte_after) &&
+      (pos + size + cur_request_size >= first_byte_after))
+    size = first_byte_after - pos;
+
+  request_pending_ = true;
+
+  // Start downloading first pending request.
+  loader_.Close();
+  loader_ = client_->CreateURLLoader();
+  pp::CompletionCallback callback =
+      loader_factory_.NewCallback(&DocumentLoader::DidOpen);
+  pp::URLRequestInfo request = GetRequest(pos, size);
+  requests_count_++;
+  int rv = loader_.Open(request, callback);
+  if (rv != PP_OK_COMPLETIONPENDING)
+    callback.Run(rv);
+}
+
+pp::URLRequestInfo DocumentLoader::GetRequest(uint32 position,
+                                              uint32 size) const {
+  pp::URLRequestInfo request(client_->GetPluginInstance());
+  request.SetURL(url_.c_str());
+  request.SetMethod("GET");
+  request.SetFollowRedirects(true);
+
+  const size_t kBufSize = 100;
+  char buf[kBufSize];
+  // According to rfc2616, byte range specifies position of the first and last
+  // bytes in the requested range inclusively. Therefore we should subtract 1
+  // from the position + size, to get index of the last byte that needs to be
+  // downloaded.
+  base::snprintf(buf, kBufSize, "Range: bytes=%d-%d", position,
+                 position + size - 1);
+  pp::Var header(buf);
+  request.SetHeaders(header);
+
+  return request;
+}
+
+void DocumentLoader::DidOpen(int32_t result) {
+  if (result != PP_OK) {
+    NOTREACHED();
+    return;
+  }
+
+  is_multipart_ = false;
+  current_chunk_size_ = 0;
+  current_chunk_read_ = 0;
+
+  pp::Var headers_var = loader_.GetResponseInfo().GetHeaders();
+  std::string headers;
+  if (headers_var.is_string())
+    headers = headers_var.AsString();
+
+  std::string boundary = GetMultiPartBoundary(headers);
+  if (boundary.size()) {
+    // Leave position untouched for now, when we read the data we'll get it.
+    is_multipart_ = true;
+    multipart_boundary_ = boundary;
+  } else {
+    // Need to make sure that the server returned a byte-range, since it's
+    // possible for a server to just ignore our bye-range request and just
+    // return the entire document even if it supports byte-range requests.
+    // i.e. sniff response to
+    // http://www.act.org/compass/sample/pdf/geometry.pdf
+    current_pos_ = 0;
+    uint32 start_pos, end_pos;
+    if (GetByteRange(headers, &start_pos, &end_pos)) {
+      current_pos_ = start_pos;
+      if (end_pos && end_pos > start_pos)
+        current_chunk_size_ = end_pos - start_pos + 1;
+    }
+  }
+
+  ReadMore();
+}
+
+bool DocumentLoader::GetByteRange(const std::string& headers, uint32* start,
+                                  uint32* end) {
+  net::HttpUtil::HeadersIterator it(headers.begin(), headers.end(), "\n");
+  while (it.GetNext()) {
+    if (LowerCaseEqualsASCII(it.name(), "content-range")) {
+      std::string range = it.values().c_str();
+      if (StartsWithASCII(range, "bytes", false)) {
+        range = range.substr(strlen("bytes"));
+        std::string::size_type pos = range.find('-');
+        std::string range_end;
+        if (pos != std::string::npos)
+          range_end = range.substr(pos + 1);
+        TrimWhitespaceASCII(range, base::TRIM_LEADING, &range);
+        TrimWhitespaceASCII(range_end, base::TRIM_LEADING, &range_end);
+        *start = atoi(range.c_str());
+        *end = atoi(range_end.c_str());
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+std::string DocumentLoader::GetMultiPartBoundary(const std::string& headers) {
+  net::HttpUtil::HeadersIterator it(headers.begin(), headers.end(), "\n");
+  while (it.GetNext()) {
+    if (LowerCaseEqualsASCII(it.name(), "content-type")) {
+      std::string type = StringToLowerASCII(it.values());
+      if (StartsWithASCII(type, "multipart/", true)) {
+        const char* boundary = strstr(type.c_str(), "boundary=");
+        if (!boundary) {
+          NOTREACHED();
+          break;
+        }
+
+        return std::string(boundary + 9);
+      }
+    }
+  }
+  return std::string();
+}
+
+void DocumentLoader::ReadMore() {
+  pp::CompletionCallback callback =
+        loader_factory_.NewCallback(&DocumentLoader::DidRead);
+  int rv = loader_.ReadResponseBody(buffer_, sizeof(buffer_), callback);
+  if (rv != PP_OK_COMPLETIONPENDING)
+    callback.Run(rv);
+}
+
+void DocumentLoader::DidRead(int32_t result) {
+  if (result > 0) {
+    char* start = buffer_;
+    size_t length = result;
+    if (is_multipart_ && result > 2) {
+      for (int i = 2; i < result; ++i) {
+        if ((buffer_[i - 1] == '\n' && buffer_[i - 2] == '\n') ||
+            (i >= 4 &&
+             buffer_[i - 1] == '\n' && buffer_[i - 2] == '\r' &&
+             buffer_[i - 3] == '\n' && buffer_[i - 4] == '\r')) {
+          uint32 start_pos, end_pos;
+          if (GetByteRange(std::string(buffer_, i), &start_pos, &end_pos)) {
+            current_pos_ = start_pos;
+            start += i;
+            length -= i;
+            if (end_pos && end_pos > start_pos)
+              current_chunk_size_ = end_pos - start_pos + 1;
+          }
+          break;
+        }
+      }
+
+      // Reset this flag so we don't look inside the buffer in future calls of
+      // DidRead for this response.  Note that this code DOES NOT handle multi-
+      // part responses with more than one part (we don't issue them at the
+      // moment, so they shouldn't arrive).
+      is_multipart_ = false;
+    }
+
+    if (current_chunk_size_ &&
+        current_chunk_read_ + length > current_chunk_size_)
+      length = current_chunk_size_ - current_chunk_read_;
+
+    if (length) {
+      if (document_size_ > 0) {
+        chunk_stream_.WriteData(current_pos_, start, length);
+      } else {
+        // If we did not get content-length in the response, we can't
+        // preallocate buffer for the entire document. Resizing array causing
+        // memory fragmentation issues on the large files and OOM exceptions.
+        // To fix this, we collect all chunks of the file to the list and
+        // concatenate them together after request is complete.
+        chunk_buffer_.push_back(std::vector<unsigned char>());
+        chunk_buffer_.back().resize(length);
+        memcpy(&(chunk_buffer_.back()[0]), start, length);
+      }
+      current_pos_ += length;
+      current_chunk_read_ += length;
+      client_->OnNewDataAvailable();
+    }
+    ReadMore();
+  } else if (result == PP_OK) {
+    ReadComplete();
+  } else {
+    NOTREACHED();
+  }
+}
+
+void DocumentLoader::ReadComplete() {
+  if (!partial_document_) {
+    if (document_size_ == 0) {
+      // For the document with no 'content-length" specified we've collected all
+      // the chunks already. Let's allocate final document buffer and copy them
+      // over.
+      chunk_stream_.Preallocate(current_pos_);
+      uint32 pos = 0;
+      std::list<std::vector<unsigned char> >::iterator it;
+      for (it = chunk_buffer_.begin(); it != chunk_buffer_.end(); ++it) {
+        chunk_stream_.WriteData(pos, &((*it)[0]), it->size());
+        pos += it->size();
+      }
+      chunk_buffer_.clear();
+    }
+    document_size_ = current_pos_;
+    client_->OnDocumentComplete();
+    return;
+  }
+
+  request_pending_ = false;
+  pending_requests_.pop_front();
+
+  // If there are more pending request - continue downloading.
+  if (!pending_requests_.empty()) {
+    DownloadPendingRequests();
+    return;
+  }
+
+  if (IsDocumentComplete()) {
+    client_->OnDocumentComplete();
+    return;
+  }
+
+  if (header_request_)
+    client_->OnPartialDocumentLoaded();
+  else
+    client_->OnPendingRequestComplete();
+  header_request_ = false;
+
+  // The OnPendingRequestComplete could have added more requests.
+  if (!pending_requests_.empty()) {
+    DownloadPendingRequests();
+  } else {
+    // Document is not complete and we have no outstanding requests.
+    // Let's keep downloading PDF file in small chunks.
+    uint32 pos = chunk_stream_.GetFirstMissingByte();
+    std::vector<std::pair<size_t, size_t> > ranges;
+    chunk_stream_.GetMissedRanges(pos, GetRequestSize(), &ranges);
+    DCHECK(ranges.size() > 0);
+    RequestData(ranges[0].first, ranges[0].second);
+  }
+}
+
+uint32 DocumentLoader::GetRequestSize() const {
+  std::map<uint32, uint32>::const_iterator iter =
+      chunk_size_table_.lower_bound(requests_count_);
+  if (iter == chunk_size_table_.end())
+    iter--;
+  return iter->second;
+}
+
+}  // namespace chrome_pdf

pdf/document_loader.h

@@ -0,0 +1,126 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_DOCUMENT_LOADER_H_
+#define PDF_DOCUMENT_LOADER_H_
+
+#include <list>
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "pdf/chunk_stream.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+#define kDefaultRequestSize 32768u
+
+namespace chrome_pdf {
+
+class DocumentLoader {
+ public:
+  class Client {
+  public:
+    // Gets the pp::Instance object.
+    virtual pp::Instance* GetPluginInstance() = 0;
+    // Creates new URLLoader based on client settings.
+    virtual pp::URLLoader CreateURLLoader() = 0;
+    // Notification called when partial information about document is available.
+    // Only called for urls that returns full content size and supports byte
+    // range requests.
+    virtual void OnPartialDocumentLoaded() = 0;
+    // Notification called when all outstanding pending requests are complete.
+    virtual void OnPendingRequestComplete() = 0;
+    // Notification called when new data is available.
+    virtual void OnNewDataAvailable() = 0;
+    // Notification called when document is fully loaded.
+    virtual void OnDocumentComplete() = 0;
+  };
+
+  explicit DocumentLoader(Client* client);
+  virtual ~DocumentLoader();
+
+  bool Init(const pp::URLLoader& loader,
+            const std::string& url,
+            const std::string& headers);
+
+  // Data access interface. Return true is sucessful.
+  bool GetBlock(uint32 position, uint32 size, void* buf) const;
+
+  // Data availability interface. Return true data avaialble.
+  bool IsDataAvailable(uint32 position, uint32 size) const;
+
+  // Data availability interface. Return true data avaialble.
+  void RequestData(uint32 position, uint32 size);
+
+  bool IsDocumentComplete() const;
+  uint32 document_size() const { return document_size_; }
+
+  // Return number of bytes available.
+  uint32 GetAvailableData() const;
+
+  // Clear pending requests from the queue.
+  void ClearPendingRequests();
+
+  bool is_partial_document() { return partial_document_; }
+
+ private:
+  // Called by the completion callback of the document's URLLoader.
+  void DidOpen(int32_t result);
+  // Call to read data from the document's URLLoader.
+  void ReadMore();
+  // Called by the completion callback of the document's URLLoader.
+  void DidRead(int32_t result);
+
+  // If the headers have a byte-range response, writes the start and end
+  // positions and returns true if at least the start position was parsed.
+  // The end position will be set to 0 if it was not found or parsed from the
+  // response.
+  // Returns false if not even a start position could be parsed.
+  static bool GetByteRange(const std::string& headers, uint32* start,
+                           uint32* end);
+
+  // If the headers have a multi-part response, returns the boundary name.
+  // Otherwise returns an empty string.
+  static std::string GetMultiPartBoundary(const std::string& headers);
+
+  // Called when we detect that partial document load is possible.
+  void LoadPartialDocument();
+  // Called when we have to load full document.
+  void LoadFullDocument();
+  // Download pending requests.
+  void DownloadPendingRequests();
+  // Called when we complete server request and read all data from it.
+  void ReadComplete();
+  // Creates request to download size byte of data data starting from position.
+  pp::URLRequestInfo GetRequest(uint32 position, uint32 size) const;
+  // Returns current request size in bytes.
+  uint32 GetRequestSize() const;
+
+  Client* client_;
+  std::string url_;
+  pp::URLLoader loader_;
+  pp::CompletionCallbackFactory<DocumentLoader> loader_factory_;
+  ChunkStream chunk_stream_;
+  bool partial_document_;
+  bool request_pending_;
+  typedef std::list<std::pair<size_t, size_t> > PendingRequests;
+  PendingRequests pending_requests_;
+  char buffer_[kDefaultRequestSize];
+  uint32 current_pos_;
+  uint32 current_chunk_size_;
+  uint32 current_chunk_read_;
+  uint32 document_size_;
+  bool header_request_;
+  bool is_multipart_;
+  std::string multipart_boundary_;
+  uint32 requests_count_;
+  std::map<uint32, uint32> chunk_size_table_;
+  std::list<std::vector<unsigned char> > chunk_buffer_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_DOCUMENT_LOADER_H_

pdf/draw_utils.cc

@@ -0,0 +1,324 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/draw_utils.h"
+
+#include <algorithm>
+#include <math.h>
+#include <vector>
+
+#include "base/logging.h"
+
+namespace chrome_pdf {
+
+inline uint8 GetBlue(const uint32& pixel) {
+  return static_cast<uint8>(pixel & 0xFF);
+}
+
+inline uint8 GetGreen(const uint32& pixel) {
+  return static_cast<uint8>((pixel >> 8) & 0xFF);
+}
+
+inline uint8 GetRed(const uint32& pixel) {
+  return static_cast<uint8>((pixel >> 16) & 0xFF);
+}
+
+inline uint8 GetAlpha(const uint32& pixel) {
+  return static_cast<uint8>((pixel >> 24) & 0xFF);
+}
+
+inline uint32_t MakePixel(uint8 red, uint8 green, uint8 blue, uint8 alpha) {
+  return (static_cast<uint32_t>(alpha) << 24) |
+      (static_cast<uint32_t>(red) << 16) |
+      (static_cast<uint32_t>(green) << 8) |
+      static_cast<uint32_t>(blue);
+}
+
+inline uint8 GradientChannel(uint8 start, uint8 end, double ratio) {
+  double new_channel = start - (static_cast<double>(start) - end) * ratio;
+  if (new_channel < 0)
+    return 0;
+  if (new_channel > 255)
+    return 255;
+  return static_cast<uint8>(new_channel + 0.5);
+}
+
+inline uint8 ProcessColor(uint8 src_color, uint8 dest_color, uint8 alpha) {
+  uint32 processed = static_cast<uint32>(src_color) * alpha +
+      static_cast<uint32>(dest_color) * (0xFF - alpha);
+  return static_cast<uint8>((processed / 0xFF) & 0xFF);
+}
+
+bool AlphaBlend(const pp::ImageData& src, const pp::Rect& src_rc,
+                pp::ImageData* dest, const pp::Point& dest_origin,
+                uint8 alpha_adjustment) {
+  const uint32_t* src_origin_pixel = src.GetAddr32(src_rc.point());
+  uint32_t* dest_origin_pixel = dest->GetAddr32(dest_origin);
+
+  int height = src_rc.height();
+  int width = src_rc.width();
+  for (int y = 0; y < height; y++) {
+    const uint32_t* src_pixel = src_origin_pixel;
+    uint32_t* dest_pixel = dest_origin_pixel;
+    for (int x = 0; x < width; x++) {
+      uint8 alpha = static_cast<uint8>(static_cast<uint32_t>(alpha_adjustment) *
+          GetAlpha(*src_pixel) / 0xFF);
+      uint8 red = ProcessColor(GetRed(*src_pixel), GetRed(*dest_pixel), alpha);
+      uint8 green = ProcessColor(GetGreen(*src_pixel),
+                                 GetGreen(*dest_pixel), alpha);
+      uint8 blue = ProcessColor(GetBlue(*src_pixel),
+                                GetBlue(*dest_pixel), alpha);
+      *dest_pixel = MakePixel(red, green, blue, GetAlpha(*dest_pixel));
+
+      src_pixel++;
+      dest_pixel++;
+    }
+    src_origin_pixel = reinterpret_cast<const uint32_t*>(
+        reinterpret_cast<const char*>(src_origin_pixel) + src.stride());
+    dest_origin_pixel = reinterpret_cast<uint32_t*>(
+        reinterpret_cast<char*>(dest_origin_pixel) + dest->stride());
+  }
+  return true;
+}
+
+void GradientFill(pp::ImageData* image, const pp::Rect& rc,
+                  uint32 start_color, uint32 end_color, bool horizontal) {
+  std::vector<uint32> colors;
+  colors.resize(horizontal ? rc.width() : rc.height());
+  for (size_t i = 0; i < colors.size(); ++i) {
+    double ratio = static_cast<double>(i) / colors.size();
+    colors[i] = MakePixel(
+        GradientChannel(GetRed(start_color), GetRed(end_color), ratio),
+        GradientChannel(GetGreen(start_color), GetGreen(end_color), ratio),
+        GradientChannel(GetBlue(start_color), GetBlue(end_color), ratio),
+        GradientChannel(GetAlpha(start_color), GetAlpha(end_color), ratio));
+  }
+
+  if (horizontal) {
+    const void* data = &(colors[0]);
+    size_t size = colors.size() * 4;
+    uint32_t* origin_pixel = image->GetAddr32(rc.point());
+    for (int y = 0; y < rc.height(); y++) {
+      memcpy(origin_pixel, data, size);
+      origin_pixel = reinterpret_cast<uint32_t*>(
+          reinterpret_cast<char*>(origin_pixel) + image->stride());
+    }
+  } else {
+    uint32_t* origin_pixel = image->GetAddr32(rc.point());
+    for (int y = 0; y < rc.height(); y++) {
+      uint32_t* pixel = origin_pixel;
+      for (int x = 0; x < rc.width(); x++) {
+        *pixel = colors[y];
+        pixel++;
+      }
+      origin_pixel = reinterpret_cast<uint32_t*>(
+          reinterpret_cast<char*>(origin_pixel) + image->stride());
+    }
+  }
+}
+
+void GradientFill(pp::Instance* instance,
+                  pp::ImageData* image,
+                  const pp::Rect& dirty_rc,
+                  const pp::Rect& gradient_rc,
+                  uint32 start_color,
+                  uint32 end_color,
+                  bool horizontal,
+                  uint8 transparency) {
+  pp::Rect draw_rc = gradient_rc.Intersect(dirty_rc);
+  if (draw_rc.IsEmpty())
+    return;
+
+  pp::ImageData gradient(instance, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+      gradient_rc.size(), false);
+
+  GradientFill(&gradient, pp::Rect(pp::Point(), gradient_rc.size()),
+               start_color, end_color, horizontal);
+
+  pp::Rect copy_rc(draw_rc);
+  copy_rc.Offset(-gradient_rc.x(), -gradient_rc.y());
+  AlphaBlend(gradient, copy_rc, image, draw_rc.point(), transparency);
+}
+
+void CopyImage(const pp::ImageData& src, const pp::Rect& src_rc,
+               pp::ImageData* dest, const pp::Rect& dest_rc,
+               bool stretch) {
+  DCHECK(src_rc.width() <= dest_rc.width() &&
+      src_rc.height() <= dest_rc.height());
+
+  const uint32_t* src_origin_pixel = src.GetAddr32(src_rc.point());
+  uint32_t* dest_origin_pixel = dest->GetAddr32(dest_rc.point());
+  if (stretch) {
+    double x_ratio = static_cast<double>(src_rc.width()) / dest_rc.width();
+    double y_ratio = static_cast<double>(src_rc.height()) / dest_rc.height();
+    int height = dest_rc.height();
+    int width = dest_rc.width();
+    for (int y = 0; y < height; y++) {
+      uint32_t* dest_pixel = dest_origin_pixel;
+      for (int x = 0; x < width; x++) {
+        uint32 src_x = static_cast<uint32>(x * x_ratio);
+        uint32 src_y = static_cast<uint32>(y * y_ratio);
+        const uint32_t* src_pixel = src.GetAddr32(
+            pp::Point(src_rc.x() + src_x, src_rc.y() + src_y));
+        *dest_pixel = *src_pixel;
+        dest_pixel++;
+      }
+      dest_origin_pixel = reinterpret_cast<uint32_t*>(
+          reinterpret_cast<char*>(dest_origin_pixel) + dest->stride());
+    }
+  } else {
+    int height = src_rc.height();
+    int width_bytes = src_rc.width() * 4;
+    for (int y = 0; y < height; y++) {
+      memcpy(dest_origin_pixel, src_origin_pixel, width_bytes);
+      src_origin_pixel = reinterpret_cast<const uint32_t*>(
+          reinterpret_cast<const char*>(src_origin_pixel) + src.stride());
+      dest_origin_pixel = reinterpret_cast<uint32_t*>(
+          reinterpret_cast<char*>(dest_origin_pixel) + dest->stride());
+    }
+  }
+}
+
+void FillRect(pp::ImageData* image, const pp::Rect& rc, uint32 color) {
+  int height = rc.height();
+  if (height == 0)
+    return;
+
+  // Fill in first row.
+  uint32_t* top_line = image->GetAddr32(rc.point());
+  int width = rc.width();
+  for (int x = 0; x < width; x++)
+    top_line[x] = color;
+
+  // Fill in the rest of the rectangle.
+  int byte_width = width * 4;
+  uint32_t* cur_line = reinterpret_cast<uint32_t*>(
+          reinterpret_cast<char*>(top_line) + image->stride());
+  for (int y = 1; y < height; y++) {
+    memcpy(cur_line, top_line, byte_width);
+    cur_line = reinterpret_cast<uint32_t*>(
+            reinterpret_cast<char*>(cur_line) + image->stride());
+  }
+}
+
+ShadowMatrix::ShadowMatrix(uint32 depth, double factor, uint32 background)
+    : depth_(depth), factor_(factor), background_(background) {
+  DCHECK(depth_ > 0);
+  matrix_.resize(depth_ * depth_);
+
+  // pv - is a rounding power factor for smoothing corners.
+  // pv = 2.0 will make corners completely round.
+  const double pv = 4.0;
+  // pow_pv - cache to avoid recalculating pow(x, pv) every time.
+  std::vector<double> pow_pv(depth_, 0.0);
+
+  double r = static_cast<double>(depth_);
+  double coef = 256.0 / pow(r, factor);
+
+  for (uint32 y = 0; y < depth_; y++) {
+    // Since matrix is symmetrical, we can reduce the number of calculations
+    // by mirroring results.
+    for (uint32 x = 0; x <= y; x++) {
+      // Fill cache if needed.
+      if (pow_pv[x] == 0.0)
+        pow_pv[x] =  pow(x, pv);
+      if (pow_pv[y] == 0.0)
+        pow_pv[y] =  pow(y, pv);
+
+      // v - is a value for the smoothing function.
+      // If x == 0 simplify calculations.
+      double v = (x == 0) ? y : pow(pow_pv[x] + pow_pv[y], 1 / pv);
+
+      // Smoothing function.
+      // If factor == 1, smoothing will be linear from 0 to the end,
+      // if 0 < factor < 1, smoothing will drop faster near 0.
+      // if factor > 1, smoothing will drop faster near the end (depth).
+      double f = 256.0 - coef * pow(v, factor);
+
+      uint8 alpha = 0;
+      if (f > kOpaqueAlpha)
+        alpha = kOpaqueAlpha;
+      else if (f < kTransparentAlpha)
+        alpha = kTransparentAlpha;
+      else
+        alpha = static_cast<uint8>(f);
+
+      uint8 red = ProcessColor(0, GetRed(background), alpha);
+      uint8 green = ProcessColor(0, GetGreen(background), alpha);
+      uint8 blue = ProcessColor(0, GetBlue(background), alpha);
+      uint32 pixel = MakePixel(red, green, blue, GetAlpha(background));
+
+      // Mirror matrix.
+      matrix_[y * depth_ + x] = pixel;
+      matrix_[x * depth_ + y] = pixel;
+    }
+  }
+}
+
+ShadowMatrix::~ShadowMatrix() {
+}
+
+void PaintShadow(pp::ImageData* image,
+                 const pp::Rect& clip_rc,
+                 const pp::Rect& shadow_rc,
+                 const ShadowMatrix& matrix) {
+  pp::Rect draw_rc = shadow_rc.Intersect(clip_rc);
+  if (draw_rc.IsEmpty())
+    return;
+
+  int32 depth = static_cast<int32>(matrix.depth());
+  for (int32_t y = draw_rc.y(); y < draw_rc.bottom(); y++) {
+    for (int32_t x = draw_rc.x(); x < draw_rc.right(); x++) {
+      int32_t matrix_x = std::max(depth + shadow_rc.x() - x - 1,
+                                  depth - shadow_rc.right() + x);
+      int32_t matrix_y = std::max(depth + shadow_rc.y() - y - 1,
+                                  depth - shadow_rc.bottom() + y);
+      uint32_t* pixel = image->GetAddr32(pp::Point(x, y));
+
+      if (matrix_x < 0)
+        matrix_x = 0;
+      else if (matrix_x >= static_cast<int32>(depth))
+        matrix_x = depth - 1;
+
+      if (matrix_y < 0)
+        matrix_y = 0;
+      else if (matrix_y >= static_cast<int32>(depth))
+        matrix_y = depth - 1;
+
+      *pixel = matrix.GetValue(matrix_x, matrix_y);
+    }
+  }
+}
+
+void DrawShadow(pp::ImageData* image,
+                const pp::Rect& shadow_rc,
+                const pp::Rect& object_rc,
+                const pp::Rect& clip_rc,
+                const ShadowMatrix& matrix) {
+  if (shadow_rc == object_rc)
+    return;  // Nothing to paint.
+
+  // Fill top part.
+  pp::Rect rc(shadow_rc.point(),
+              pp::Size(shadow_rc.width(), object_rc.y() - shadow_rc.y()));
+  PaintShadow(image, rc.Intersect(clip_rc), shadow_rc, matrix);
+
+  // Fill bottom part.
+  rc = pp::Rect(shadow_rc.x(), object_rc.bottom(),
+                shadow_rc.width(), shadow_rc.bottom() - object_rc.bottom());
+  PaintShadow(image, rc.Intersect(clip_rc), shadow_rc, matrix);
+
+  // Fill left part.
+  rc = pp::Rect(shadow_rc.x(), object_rc.y(),
+                object_rc.x() - shadow_rc.x(), object_rc.height());
+  PaintShadow(image, rc.Intersect(clip_rc), shadow_rc, matrix);
+
+  // Fill right part.
+  rc = pp::Rect(object_rc.right(), object_rc.y(),
+                shadow_rc.right() - object_rc.right(), object_rc.height());
+  PaintShadow(image, rc.Intersect(clip_rc), shadow_rc, matrix);
+}
+
+}  // namespace chrome_pdf
+

pdf/draw_utils.h

@@ -0,0 +1,94 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_DRAW_UTILS_H_
+#define PDF_DRAW_UTILS_H_
+
+#include <vector>
+
+#include "base/basictypes.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/rect.h"
+
+namespace chrome_pdf {
+
+const uint8 kOpaqueAlpha = 0xFF;
+const uint8 kTransparentAlpha = 0x00;
+
+bool AlphaBlend(const pp::ImageData& src, const pp::Rect& src_rc,
+                pp::ImageData* dest, const pp::Point& dest_origin,
+                uint8 alpha_adjustment);
+
+// Fill rectangle with gradient horizontally or vertically. Start is a color of
+// top-left point of the rectangle, end color is a color of
+// top-right (horizontal==true) or bottom-left (horizontal==false) point.
+void GradientFill(pp::ImageData* image,
+                  const pp::Rect& rc,
+                  uint32 start_color,
+                  uint32 end_color,
+                  bool horizontal);
+
+// Fill dirty rectangle with gradient, where gradient color set for corners of
+// gradient rectangle. Parts of the dirty rect outside of gradient rect will
+// be unchanged.
+void GradientFill(pp::Instance* instance,
+                  pp::ImageData* image,
+                  const pp::Rect& dirty_rc,
+                  const pp::Rect& gradient_rc,
+                  uint32 start_color,
+                  uint32 end_color,
+                  bool horizontal,
+                  uint8 transparency);
+
+// Copy one image into another. If stretch is true, the result occupy the entire
+// dest_rc. If stretch is false, dest_rc.point will be used as an origin of the
+// result image. Copy will ignore all pixels with transparent alpha from the
+// source image.
+void CopyImage(const pp::ImageData& src, const pp::Rect& src_rc,
+               pp::ImageData* dest, const pp::Rect& dest_rc,
+               bool stretch);
+
+// Fill in rectangle with specified color.
+void FillRect(pp::ImageData* image, const pp::Rect& rc, uint32 color);
+
+// Shadow Matrix contains matrix for shadow rendering. To reduce amount of
+// calculations user may choose to cache matrix and reuse it if nothing changed.
+class ShadowMatrix {
+ public:
+  // Matrix parameters.
+  // depth - how big matrix should be. Shadow will go smoothly across the
+  // entire matrix from black to background color.
+  // If factor == 1, smoothing will be linear from 0 to the end (depth),
+  // if 0 < factor < 1, smoothing will drop faster near 0.
+  // if factor > 1, smoothing will drop faster near the end (depth).
+  ShadowMatrix(uint32 depth, double factor, uint32 background);
+
+  ~ShadowMatrix();
+
+  uint32 GetValue(int32 x, int32 y) const { return matrix_[y * depth_ + x]; }
+
+  uint32 depth() const { return depth_; }
+  double factor() const { return factor_; }
+  uint32 background() const { return background_; }
+
+ private:
+  uint32 depth_;
+  double factor_;
+  uint32 background_;
+  std::vector<uint32> matrix_;
+};
+
+// Draw shadow on the image using provided ShadowMatrix.
+// shadow_rc - rectangle occupied by shadow
+// object_rc - rectangle that drops the shadow
+// clip_rc - clipping region
+void DrawShadow(pp::ImageData* image,
+                const pp::Rect& shadow_rc,
+                const pp::Rect& object_rc,
+                const pp::Rect& clip_rc,
+                const ShadowMatrix& matrix);
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_DRAW_UTILS_H_

pdf/fading_control.cc

@@ -0,0 +1,75 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/fading_control.h"
+
+#include <math.h>
+
+#include "base/logging.h"
+#include "pdf/draw_utils.h"
+#include "pdf/resource_consts.h"
+
+namespace chrome_pdf {
+
+FadingControl::FadingControl()
+    : alpha_shift_(0), timer_id_(0) {
+}
+
+FadingControl::~FadingControl() {
+}
+
+void FadingControl::OnTimerFired(uint32 timer_id) {
+  if (timer_id == timer_id_) {
+    int32 new_alpha = transparency() + alpha_shift_;
+    if (new_alpha <= kTransparentAlpha) {
+      Show(false, true);
+      OnFadeOutComplete();
+      return;
+    }
+    if (new_alpha >= kOpaqueAlpha) {
+      AdjustTransparency(kOpaqueAlpha, true);
+      OnFadeInComplete();
+      return;
+    }
+
+    AdjustTransparency(static_cast<uint8>(new_alpha), true);
+    timer_id_ = owner()->ScheduleTimer(id(), kFadingTimeoutMs);
+  }
+}
+
+// Fade In/Out control depending on visible flag over the time of time_ms.
+void FadingControl::Fade(bool show, uint32 time_ms) {
+  DCHECK(time_ms != 0);
+  // Check if we already in the same state.
+  if (!visible() && !show)
+    return;
+  if (!visible() && show) {
+    Show(show, false);
+    AdjustTransparency(kTransparentAlpha, false);
+    OnFadeOutComplete();
+  }
+  if (transparency() == kOpaqueAlpha && show) {
+    OnFadeInComplete();
+    return;
+  }
+
+  int delta = show ? kOpaqueAlpha - transparency() : transparency();
+  double shift =
+      static_cast<double>(delta) * kFadingTimeoutMs / time_ms;
+  if (shift > delta)
+    alpha_shift_ = delta;
+  else
+    alpha_shift_ = static_cast<int>(ceil(shift));
+
+  if (alpha_shift_ == 0)
+    alpha_shift_ = 1;
+
+  // If disabling, make alpha shift negative.
+  if (!show)
+    alpha_shift_ = -alpha_shift_;
+
+  timer_id_ = owner()->ScheduleTimer(id(), kFadingTimeoutMs);
+}
+
+}  // namespace chrome_pdf

pdf/fading_control.h

@@ -0,0 +1,32 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_FADING_CONTROL_H_
+#define PDF_FADING_CONTROL_H_
+
+#include "pdf/control.h"
+
+namespace chrome_pdf {
+
+class FadingControl : public Control {
+ public:
+  FadingControl();
+  virtual ~FadingControl();
+
+  virtual void OnTimerFired(uint32 timer_id);
+
+  // Fade In/Out control depending on visible flag over the time of time_ms.
+  virtual void Fade(bool visible, uint32 time_ms);
+
+  virtual void OnFadeInComplete() {}
+  virtual void OnFadeOutComplete() {}
+
+ private:
+  int alpha_shift_;
+  uint32 timer_id_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_FADING_CONTROL_H_

pdf/fading_controls.cc

@@ -0,0 +1,316 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/fading_controls.h"
+
+#include "base/logging.h"
+#include "base/stl_util.h"
+#include "pdf/draw_utils.h"
+#include "pdf/resource_consts.h"
+#include "ppapi/cpp/input_event.h"
+
+namespace chrome_pdf {
+
+const uint32 kFadingAlphaShift = 64;
+const uint32 kSplashFadingAlphaShift = 16;
+
+FadingControls::FadingControls()
+    : state_(NONE), current_transparency_(kOpaqueAlpha), fading_timer_id_(0),
+      current_capture_control_(kInvalidControlId),
+      fading_timeout_(kFadingTimeoutMs), alpha_shift_(kFadingAlphaShift),
+      splash_(false), splash_timeout_(0) {
+}
+
+FadingControls::~FadingControls() {
+  STLDeleteElements(&controls_);
+}
+
+bool FadingControls::CreateFadingControls(
+    uint32 id, const pp::Rect& rc, bool visible,
+    Control::Owner* owner, uint8 transparency) {
+  current_transparency_ = transparency;
+  return Control::Create(id, rc, visible, owner);
+}
+
+void FadingControls::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
+  // When this control is set to invisible the individual controls are not.
+  // So we need to check for visible() here.
+  if (!visible())
+    return;
+
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    (*iter)->Paint(image_data, rc);
+  }
+}
+
+bool FadingControls::HandleEvent(const pp::InputEvent& event) {
+  if (!visible())
+    return false;
+
+  pp::MouseInputEvent mouse_event(event);
+  if (mouse_event.is_null())
+    return NotifyControls(event);
+
+  pp::Point pt = mouse_event.GetPosition();
+
+  bool is_mouse_click =
+      mouse_event.GetType() == PP_INPUTEVENT_TYPE_MOUSEDOWN ||
+      mouse_event.GetType() == PP_INPUTEVENT_TYPE_MOUSEUP;
+
+  if (rect().Contains(pt)) {
+    CancelSplashMode();
+    FadeIn();
+
+    // Eat mouse click if are invisible or just fading in.
+    // That prevents accidental clicks on the controls for touch devices.
+    bool eat_mouse_click =
+        (state_ == FADING_IN || current_transparency_ == kTransparentAlpha);
+    if (eat_mouse_click && is_mouse_click &&
+        mouse_event.GetButton() == PP_INPUTEVENT_MOUSEBUTTON_LEFT)
+      return true;  // Eat this event here.
+  }
+
+  if ((!rect().Contains(pt)) ||
+      event.GetType() == PP_INPUTEVENT_TYPE_MOUSELEAVE) {
+    if (!splash_)
+      FadeOut();
+    pp::MouseInputEvent event_leave(pp::MouseInputEvent(
+        owner()->GetInstance(),
+        PP_INPUTEVENT_TYPE_MOUSELEAVE,
+        event.GetTimeStamp(),
+        event.GetModifiers(),
+        mouse_event.GetButton(),
+        mouse_event.GetPosition(),
+        mouse_event.GetClickCount(),
+        mouse_event.GetMovement()));
+    return NotifyControls(event_leave);
+  }
+
+  return NotifyControls(event);
+}
+
+void FadingControls::OnTimerFired(uint32 timer_id) {
+  if (timer_id == fading_timer_id_) {
+    int32 current_alpha = static_cast<int32>(current_transparency_);
+    if (state_ == FADING_IN)
+      current_alpha += alpha_shift_;
+    else if (state_ == FADING_OUT)
+      current_alpha -= alpha_shift_;
+
+    if (current_alpha >= kOpaqueAlpha) {
+      state_ = NONE;
+      current_alpha = kOpaqueAlpha;
+    } else if (current_alpha <= kTransparentAlpha) {
+      state_ = NONE;
+      current_alpha = kTransparentAlpha;
+    }
+    current_transparency_ = static_cast<uint8>(current_alpha);
+
+    // Invalidate controls with new alpha transparency.
+    std::list<Control*>::iterator iter;
+    for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+      // We are going to invalidate the whole FadingControls area, to
+      // allow simultaneous drawing.
+      (*iter)->AdjustTransparency(current_transparency_, false);
+    }
+    owner()->Invalidate(id(), GetControlsRect());
+
+    if (state_ != NONE)  // Fading still in progress.
+      fading_timer_id_ = owner()->ScheduleTimer(id(), fading_timeout_);
+    else
+      OnFadingComplete();
+  } else {
+    // Dispatch timer to controls.
+    std::list<Control*>::iterator iter;
+    for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+      (*iter)->OnTimerFired(timer_id);
+    }
+  }
+}
+
+void FadingControls::EventCaptureReleased() {
+  if (current_capture_control_ != kInvalidControlId) {
+    // Remove previous catpure.
+    Control* ctrl = GetControl(current_capture_control_);
+    if (ctrl)
+      ctrl->EventCaptureReleased();
+  }
+}
+
+void FadingControls::MoveBy(const pp::Point& offset, bool invalidate) {
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    // We invalidate entire FadingControl later if needed.
+    (*iter)->MoveBy(offset, false);
+  }
+  Control::MoveBy(offset, invalidate);
+}
+
+void FadingControls::OnEvent(uint32 control_id, uint32 event_id, void* data) {
+  owner()->OnEvent(control_id, event_id, data);
+}
+
+void FadingControls::Invalidate(uint32 control_id, const pp::Rect& rc) {
+  owner()->Invalidate(control_id, rc);
+}
+
+uint32 FadingControls::ScheduleTimer(uint32 control_id, uint32 timeout_ms) {
+  // TODO(gene): implement timer routine properly.
+  NOTIMPLEMENTED();
+  //owner()->ScheduleTimer(control_id);
+  return 0;
+}
+
+void FadingControls::SetEventCapture(uint32 control_id, bool set_capture) {
+  if (control_id == current_capture_control_) {
+    if (!set_capture)  // Remove event capture.
+      current_capture_control_ = kInvalidControlId;
+  } else {
+    EventCaptureReleased();
+    current_capture_control_ = control_id;
+  }
+}
+
+void FadingControls::SetCursor(uint32 control_id,
+                               PP_CursorType_Dev cursor_type) {
+  owner()->SetCursor(control_id, cursor_type);
+}
+
+pp::Instance* FadingControls::GetInstance() {
+  return owner()->GetInstance();
+}
+
+bool FadingControls::AddControl(Control* control) {
+  DCHECK(control);
+  if (control->owner() != this)
+    return false;
+  if (!rect().Contains(control->rect()))
+    return false;
+
+  control->AdjustTransparency(current_transparency_, false);
+  controls_.push_back(control);
+  return true;
+}
+
+void FadingControls::RemoveControl(uint32 control_id) {
+  if (current_capture_control_ == control_id) {
+    current_capture_control_ = kInvalidControlId;
+  }
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    if ((*iter)->id() == control_id) {
+      delete (*iter);
+      controls_.erase(iter);
+      break;
+    }
+  }
+}
+
+Control* FadingControls::GetControl(uint32 id) {
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    if ((*iter)->id() == id)
+      return *iter;
+  }
+  return NULL;
+}
+
+pp::Rect FadingControls::GetControlsRect() {
+  pp::Rect rc;
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    rc = rc.Union((*iter)->rect());
+  }
+  return rc;
+}
+
+bool FadingControls::ExpandLeft(int offset) {
+  pp::Rect rc = rect();
+  rc.set_width(rc.width() + offset);
+  rc.set_x(rc.x() - offset);
+  if (!rc.Contains(GetControlsRect()))
+    return false;
+  // No need to invalidate since we are expanding triggering area only.
+  SetRect(rc, false);
+  return true;
+}
+
+void FadingControls::Splash(uint32 time_ms) {
+  splash_ = true;
+  splash_timeout_ = time_ms;
+  alpha_shift_ = kSplashFadingAlphaShift;
+  FadeIn();
+}
+
+bool FadingControls::NotifyControls(const pp::InputEvent& event) {
+  // First pass event to a control that current capture is set to.
+  Control* ctrl = GetControl(current_capture_control_);
+  if (ctrl) {
+    if (ctrl->HandleEvent(event))
+      return true;
+  }
+
+  std::list<Control*>::iterator iter;
+  for (iter = controls_.begin(); iter != controls_.end(); ++iter) {
+    // Now pass event to all control except control with capture,
+    // since we already passed to it above.
+    if ((*iter) != ctrl && (*iter)->HandleEvent(event))
+      return true;
+  }
+  return false;
+}
+
+void FadingControls::FadeIn() {
+  bool already_visible =
+      (state_ == NONE && current_transparency_ == kOpaqueAlpha);
+  if (state_ != FADING_IN && !already_visible) {
+    state_ = FADING_IN;
+    fading_timer_id_ = owner()->ScheduleTimer(id(), fading_timeout_);
+  }
+  if (already_visible)
+    OnFadingComplete();
+}
+
+void FadingControls::FadeOut() {
+  bool already_invisible =
+      (state_ == NONE && current_transparency_ == kTransparentAlpha);
+  if (state_ != FADING_OUT && !already_invisible) {
+    state_ = FADING_OUT;
+    fading_timer_id_ = owner()->ScheduleTimer(id(), fading_timeout_);
+  }
+  if (already_invisible)
+    OnFadingComplete();
+}
+
+void FadingControls::OnFadingComplete() {
+  DCHECK(current_transparency_ == kOpaqueAlpha ||
+      current_transparency_ == kTransparentAlpha);
+  // In the splash mode following states are possible:
+  // Fade-in complete: splash_==true, splash_timeout_ != 0
+  //   We need to schedule timer for splash_timeout_.
+  // Splash timeout complete: splash_==true, splash_timeout_ == 0
+  //   We need to fade out still using splash settings.
+  // Fade-out complete: current_transparency_ == kTransparentAlpha
+  //   We need to cancel splash mode and go back to normal settings.
+  if (splash_) {
+    if (current_transparency_ == kOpaqueAlpha) {
+      if (splash_timeout_) {
+        fading_timer_id_ = owner()->ScheduleTimer(id(), splash_timeout_);
+        splash_timeout_ = 0;
+      } else {
+        FadeOut();
+      }
+    } else {
+      CancelSplashMode();
+    }
+  }
+}
+
+void FadingControls::CancelSplashMode() {
+  splash_ = false;
+  alpha_shift_ = kFadingAlphaShift;
+}
+
+}  // namespace chrome_pdf

pdf/fading_controls.h

@@ -0,0 +1,84 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_FADING_CONTROLS_H_
+#define PDF_FADING_CONTROLS_H_
+
+#include <list>
+
+#include "pdf/control.h"
+
+namespace chrome_pdf {
+
+class FadingControls : public Control,
+                       public ControlOwner {
+ public:
+  enum FadingState {
+    NONE,
+    FADING_IN,
+    FADING_OUT
+  };
+
+  FadingControls();
+  virtual ~FadingControls();
+  virtual bool CreateFadingControls(
+      uint32 id, const pp::Rect& rc, bool visible,
+      Control::Owner* delegate, uint8 transparency);
+
+  // Control interface.
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
+  virtual bool HandleEvent(const pp::InputEvent& event);
+  virtual void OnTimerFired(uint32 timer_id);
+  virtual void EventCaptureReleased();
+  virtual void MoveBy(const pp::Point& offset, bool invalidate);
+
+  // ControlOwner interface.
+  virtual void OnEvent(uint32 control_id, uint32 event_id, void* data);
+  virtual void Invalidate(uint32 control_id, const pp::Rect& rc);
+  virtual uint32 ScheduleTimer(uint32 control_id, uint32 timeout_ms);
+  virtual void SetEventCapture(uint32 control_id, bool set_capture);
+  virtual void SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type);
+  virtual pp::Instance* GetInstance();
+
+  // FadingControls interface
+  // This function takes ownership of the control, and will destoy it
+  // when control is destroyed.
+  // Input control MUST be located inside FadingControls boundaries, and has
+  // this instance of FadingControls as a delegate.
+  virtual bool AddControl(Control* control);
+  virtual void RemoveControl(uint32 control_id);
+  virtual Control* GetControl(uint32 id);
+  virtual pp::Rect GetControlsRect();
+
+  // Expand/Shrink area which triggers inner control appearance to the left.
+  virtual bool ExpandLeft(int offset);
+
+  // Fade-in, then show controls for time_ms, and then fade-out. Any mouse
+  // event in this control area will interrupt splash mode.
+  virtual void Splash(uint32 time_ms);
+
+  uint8 current_transparency() const { return current_transparency_; }
+
+ private:
+  bool NotifyControls(const pp::InputEvent& event);
+  void FadeIn();
+  void FadeOut();
+  void OnFadingComplete();
+  void CancelSplashMode();
+
+  std::list<Control*> controls_;
+  FadingState state_;
+  uint8 current_transparency_;
+  uint32 fading_timer_id_;
+  uint32 current_capture_control_;
+  uint32 fading_timeout_;
+  uint32 alpha_shift_;
+  bool splash_;
+  uint32 splash_timeout_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_FADING_CONTROLS_H_
+

pdf/instance.h

@@ -0,0 +1,526 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_INSTANCE_H_
+#define PDF_INSTANCE_H_
+
+#include <queue>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "pdf/button.h"
+#include "pdf/fading_controls.h"
+#include "pdf/page_indicator.h"
+#include "pdf/paint_manager.h"
+#include "pdf/pdf_engine.h"
+#include "pdf/preview_mode_client.h"
+#include "pdf/progress_control.h"
+#include "pdf/thumbnail_control.h"
+
+#include "ppapi/c/private/ppb_pdf.h"
+#include "ppapi/cpp/dev/printing_dev.h"
+#include "ppapi/cpp/dev/scriptable_object_deprecated.h"
+#include "ppapi/cpp/dev/scrollbar_dev.h"
+#include "ppapi/cpp/dev/selection_dev.h"
+#include "ppapi/cpp/dev/widget_client_dev.h"
+#include "ppapi/cpp/dev/zoom_dev.h"
+#include "ppapi/cpp/graphics_2d.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/private/find_private.h"
+#include "ppapi/cpp/private/instance_private.h"
+#include "ppapi/cpp/private/var_private.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+namespace pp {
+class TextInput_Dev;
+}
+
+namespace chrome_pdf {
+
+struct ToolbarButtonInfo;
+
+class Instance : public pp::InstancePrivate,
+                 public pp::Find_Private,
+                 public pp::Printing_Dev,
+                 public pp::Selection_Dev,
+                 public pp::WidgetClient_Dev,
+                 public pp::Zoom_Dev,
+                 public PaintManager::Client,
+                 public PDFEngine::Client,
+                 public PreviewModeClient::Client,
+                 public ControlOwner {
+ public:
+  explicit Instance(PP_Instance instance);
+  virtual ~Instance();
+
+  // pp::Instance implementation.
+  virtual bool Init(uint32_t argc,
+                    const char* argn[],
+                    const char* argv[]) OVERRIDE;
+  virtual bool HandleDocumentLoad(const pp::URLLoader& loader) OVERRIDE;
+  virtual bool HandleInputEvent(const pp::InputEvent& event) OVERRIDE;
+  virtual void DidChangeView(const pp::View& view) OVERRIDE;
+  virtual pp::Var GetInstanceObject() OVERRIDE;
+
+  // pp::Find_Private implementation.
+  virtual bool StartFind(const std::string& text, bool case_sensitive) OVERRIDE;
+  virtual void SelectFindResult(bool forward) OVERRIDE;
+  virtual void StopFind() OVERRIDE;
+
+  // pp::PaintManager::Client implementation.
+  virtual void OnPaint(const std::vector<pp::Rect>& paint_rects,
+                       std::vector<PaintManager::ReadyRect>* ready,
+                       std::vector<pp::Rect>* pending) OVERRIDE;
+
+  // pp::Printing_Dev implementation.
+  virtual uint32_t QuerySupportedPrintOutputFormats() OVERRIDE;
+  virtual int32_t PrintBegin(
+      const PP_PrintSettings_Dev& print_settings) OVERRIDE;
+  virtual pp::Resource PrintPages(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count) OVERRIDE;
+  virtual void PrintEnd() OVERRIDE;
+  virtual bool IsPrintScalingDisabled() OVERRIDE;
+
+  // pp::Private implementation.
+  virtual pp::Var GetLinkAtPosition(const pp::Point& point);
+
+  // PPP_Selection_Dev implementation.
+  virtual pp::Var GetSelectedText(bool html) OVERRIDE;
+
+  // WidgetClient_Dev implementation.
+  virtual void InvalidateWidget(pp::Widget_Dev widget,
+                                const pp::Rect& dirty_rect) OVERRIDE;
+  virtual void ScrollbarValueChanged(pp::Scrollbar_Dev scrollbar,
+                                     uint32_t value) OVERRIDE;
+  virtual void ScrollbarOverlayChanged(pp::Scrollbar_Dev scrollbar,
+                                       bool overlay) OVERRIDE;
+
+  // pp::Zoom_Dev implementation.
+  virtual void Zoom(double scale, bool text_only) OVERRIDE;
+  void ZoomChanged(double factor);  // Override.
+
+  void FlushCallback(int32_t result);
+  void DidOpen(int32_t result);
+  void DidOpenPreview(int32_t result);
+  // If the given widget intersects the rectangle, paints it and adds the
+  // rect to ready.
+  void PaintIfWidgetIntersects(pp::Widget_Dev* widget,
+                               const pp::Rect& rect,
+                               std::vector<PaintManager::ReadyRect>* ready,
+                               std::vector<pp::Rect>* pending);
+
+  // Called when the timer is fired.
+  void OnTimerFired(int32_t);
+  void OnClientTimerFired(int32_t id);
+
+  // Called when the control timer is fired.
+  void OnControlTimerFired(int32_t,
+                           const uint32& control_id,
+                           const uint32& timer_id);
+
+  // Called to print without re-entrancy issues.
+  void OnPrint(int32_t);
+
+  // PDFEngine::Client implementation.
+  virtual void DocumentSizeUpdated(const pp::Size& size);
+  virtual void Invalidate(const pp::Rect& rect);
+  virtual void Scroll(const pp::Point& point);
+  virtual void ScrollToX(int position);
+  virtual void ScrollToY(int position);
+  virtual void ScrollToPage(int page);
+  virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
+  virtual void UpdateCursor(PP_CursorType_Dev cursor);
+  virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
+  virtual void NotifyNumberOfFindResultsChanged(int total, bool final_result);
+  virtual void NotifySelectedFindResultChanged(int current_find_index);
+  virtual void GetDocumentPassword(
+      pp::CompletionCallbackWithOutput<pp::Var> callback);
+  virtual void Alert(const std::string& message);
+  virtual bool Confirm(const std::string& message);
+  virtual std::string Prompt(const std::string& question,
+                             const std::string& default_answer);
+  virtual std::string GetURL();
+  virtual void Email(const std::string& to,
+                     const std::string& cc,
+                     const std::string& bcc,
+                     const std::string& subject,
+                     const std::string& body);
+  virtual void Print();
+  virtual void SubmitForm(const std::string& url,
+                          const void* data,
+                          int length);
+  virtual std::string ShowFileSelectionDialog();
+  virtual pp::URLLoader CreateURLLoader();
+  virtual void ScheduleCallback(int id, int delay_in_ms);
+  virtual void SearchString(const base::char16* string,
+                            const base::char16* term,
+                            bool case_sensitive,
+                            std::vector<SearchStringResult>* results);
+  virtual void DocumentPaintOccurred();
+  virtual void DocumentLoadComplete(int page_count);
+  virtual void DocumentLoadFailed();
+  virtual pp::Instance* GetPluginInstance();
+  virtual void DocumentHasUnsupportedFeature(const std::string& feature);
+  virtual void DocumentLoadProgress(uint32 available, uint32 doc_size);
+  virtual void FormTextFieldFocusChange(bool in_focus);
+  virtual bool IsPrintPreview();
+
+  // ControlOwner implementation.
+  virtual void OnEvent(uint32 control_id, uint32 event_id, void* data);
+  virtual void Invalidate(uint32 control_id, const pp::Rect& rc);
+  virtual uint32 ScheduleTimer(uint32 control_id, uint32 timeout_ms);
+  virtual void SetEventCapture(uint32 control_id, bool set_capture);
+  virtual void SetCursor(uint32 control_id, PP_CursorType_Dev cursor_type);
+  virtual pp::Instance* GetInstance();
+
+  bool dont_paint() const { return dont_paint_; }
+  void set_dont_paint(bool dont_paint) { dont_paint_ = dont_paint; }
+
+  // Called by PDFScriptableObject.
+  bool HasScriptableMethod(const pp::Var& method, pp::Var* exception);
+  pp::Var CallScriptableMethod(const pp::Var& method,
+                               const std::vector<pp::Var>& args,
+                               pp::Var* exception);
+
+  // PreviewModeClient::Client implementation.
+  virtual void PreviewDocumentLoadComplete() OVERRIDE;
+  virtual void PreviewDocumentLoadFailed() OVERRIDE;
+
+  // Helper functions for implementing PPP_PDF.
+  void RotateClockwise();
+  void RotateCounterclockwise();
+
+ private:
+  // Called whenever the plugin geometry changes to update the location of the
+  // scrollbars, background parts, and notifies the pdf engine.
+  void OnGeometryChanged(double old_zoom, float old_device_scale);
+
+  void CreateHorizontalScrollbar();
+  void CreateVerticalScrollbar();
+  void DestroyHorizontalScrollbar();
+  void DestroyVerticalScrollbar();
+
+  // Returns the thickness of a scrollbar. This returns the thickness when it's
+  // shown, so for overlay scrollbars it'll still be non-zero.
+  int GetScrollbarThickness();
+
+  // Returns the space we need to reserve for the scrollbar in the plugin area.
+  // If overlay scrollbars are used, this will be 0.
+  int GetScrollbarReservedThickness();
+
+  // Returns true if overlay scrollbars are in use.
+  bool IsOverlayScrollbar();
+
+  // Figures out the location of any background rectangles (i.e. those that
+  // aren't painted by the PDF engine).
+  void CalculateBackgroundParts();
+
+  // Computes document width/height in device pixels, based on current zoom and
+  // device scale
+  int GetDocumentPixelWidth() const;
+  int GetDocumentPixelHeight() const;
+
+  // Draws a rectangle with the specified dimensions and color in our buffer.
+  void FillRect(const pp::Rect& rect, unsigned int color);
+
+  std::vector<pp::ImageData> GetThumbnailResources();
+  std::vector<pp::ImageData> GetProgressBarResources(pp::ImageData* background);
+
+  void CreateToolbar(const ToolbarButtonInfo* tb_info, size_t size);
+  int GetToolbarRightOffset();
+  int GetToolbarBottomOffset();
+  void CreateProgressBar();
+  void ConfigureProgressBar();
+  void CreateThumbnails();
+  void CreatePageIndicator(bool always_visible);
+  void ConfigurePageIndicator();
+
+  void PaintOverlayControl(Control* ctrl,
+                           pp::ImageData* image_data,
+                           std::vector<PaintManager::ReadyRect>* ready);
+
+  void LoadUrl(const std::string& url);
+  void LoadPreviewUrl(const std::string& url);
+  void LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
+                       void (Instance::* method)(int32_t));
+
+  // Creates a URL loader and allows it to access all urls, i.e. not just the
+  // frame's origin.
+  pp::URLLoader CreateURLLoaderInternal();
+
+  // Figure out the initial page to display based on #page=N and #nameddest=foo
+  // in the |url_|.
+  // Returns -1 if there is no valid fragment. The returned value is 0-based,
+  // whereas page=N is 1-based.
+  int GetInitialPage(const std::string& url);
+
+  void UpdateToolbarPosition(bool invalidate);
+  void UpdateProgressBarPosition(bool invalidate);
+  void UpdatePageIndicatorPosition(bool invalidate);
+
+  void FormDidOpen(int32_t result);
+
+  std::string GetLocalizedString(PP_ResourceString id);
+
+  void UserMetricsRecordAction(const std::string& action);
+
+  void SaveAs();
+
+  enum ZoomMode {
+    ZOOM_SCALE,  // Standard zooming mode, resize will not affect it.
+    ZOOM_FIT_TO_WIDTH,  // Maintain fit to width on resize.
+    ZOOM_FIT_TO_PAGE,  // Maintain fit to page on resize.
+    ZOOM_AUTO  // Maintain the default auto fitting mode on resize.
+  };
+
+  enum DocumentLoadState {
+    LOAD_STATE_LOADING,
+    LOAD_STATE_COMPLETE,
+    LOAD_STATE_FAILED,
+  };
+
+  // Set new zoom mode and scale. Scale will be ignored if mode != ZOOM_SCALE.
+  void SetZoom(ZoomMode zoom_mode, double scale);
+
+  // Updates internal zoom scale based on the plugin/document geometry and
+  // current mode.
+  void UpdateZoomScale();
+
+  // Simulates how Chrome "snaps" zooming up/down to the next nearest zoom level
+  // when the previous zoom level wasn't an integer.  We do this so that
+  // pressing the zoom buttons has the same effect as the menu buttons, even if
+  // we start from a non-standard zoom level because of fit-width or fit-height.
+  double CalculateZoom(uint32 control_id) const;
+
+  pp::ImageData CreateResourceImage(PP_ResourceImage image_id);
+
+  void DrawText(const pp::Point& top_center, PP_ResourceString id);
+
+  // Set print preview mode, where the current PDF document is reduced to
+  // only one page, and then extended to |page_count| pages with
+  // |page_count| - 1 blank pages.
+  void SetPrintPreviewMode(int page_count);
+
+  // Returns the page number to be displayed in the page indicator. If the
+  // plugin is running within print preview, the displayed number might be
+  // different from the index of the displayed page.
+  int GetPageNumberToDisplay();
+
+  // Process the preview page data information. |src_url| specifies the preview
+  // page data location. The |src_url| is in the format:
+  // chrome://print/id/page_number/print.pdf
+  // |dst_page_index| specifies the blank page index that needs to be replaced
+  // with the new page data.
+  void ProcessPreviewPageInfo(const std::string& src_url, int dst_page_index);
+  // Load the next available preview page into the blank page.
+  void LoadAvailablePreviewPage();
+
+  // Enables autoscroll using origin as a neutral (center) point.
+  void EnableAutoscroll(const pp::Point& origin);
+  // Disables autoscroll and returns to normal functionality.
+  void DisableAutoscroll();
+  // Calculate autoscroll info and return proper mouse pointer and scroll
+  // andjustments.
+  PP_CursorType_Dev CalculateAutoscroll(const pp::Point& mouse_pos);
+
+  void ConfigureNumberImageGenerator();
+
+  NumberImageGenerator* number_image_generator();
+
+  int GetScaled(int x) const;
+
+  pp::ImageData image_data_;
+  // Used when the plugin is embedded in a page and we have to create the loader
+  // ourself.
+  pp::CompletionCallbackFactory<Instance> loader_factory_;
+  pp::URLLoader embed_loader_;
+  pp::URLLoader embed_preview_loader_;
+
+  scoped_ptr<pp::Scrollbar_Dev> h_scrollbar_;
+  scoped_ptr<pp::Scrollbar_Dev> v_scrollbar_;
+  int32 valid_v_range_;
+
+  PP_CursorType_Dev cursor_;  // The current cursor.
+
+  // Used when selecting and dragging beyond the visible portion, in which case
+  // we want to scroll the document.
+  bool timer_pending_;
+  pp::MouseInputEvent last_mouse_event_;
+  pp::CompletionCallbackFactory<Instance> timer_factory_;
+  uint32 current_timer_id_;
+
+  // Size, in pixels, of plugin rectangle.
+  pp::Size plugin_size_;
+  // Size, in DIPs, of plugin rectangle.
+  pp::Size plugin_dip_size_;
+  // Remaining area, in pixels, to render the pdf in after accounting for
+  // scrollbars/toolbars and horizontal centering.
+  pp::Rect available_area_;
+  // Size of entire document in pixels (i.e. if each page is 800 pixels high and
+  // there are 10 pages, the height will be 8000).
+  pp::Size document_size_;
+
+  double zoom_;  // Current zoom factor.
+
+  float device_scale_;  // Current device scale factor.
+  bool printing_enabled_;
+  bool hidpi_enabled_;
+  // True if the plugin is full-page.
+  bool full_;
+  // Zooming mode (none, fit to width, fit to height)
+  ZoomMode zoom_mode_;
+
+  // If true, this means we told the RenderView that we're starting a network
+  // request so that it can start the throbber. We will tell it again once the
+  // document finishes loading.
+  bool did_call_start_loading_;
+
+  // Hold off on painting invalidated requests while this flag is true.
+  bool dont_paint_;
+
+  // Indicates if plugin is in autoscroll mode.
+  bool is_autoscroll_;
+  // Rect for autoscroll anchor.
+  pp::Rect autoscroll_rect_;
+  // Image of the autoscroll anchor and its background.
+  pp::ImageData autoscroll_anchor_;
+  // Autoscrolling deltas in pixels.
+  int autoscroll_x_;
+  int autoscroll_y_;
+
+  // Thickness of a scrollbar.
+  int scrollbar_thickness_;
+
+  // Reserved thickness of a scrollbar. This is how much space the scrollbar
+  // takes from the available area. 0 for overlay.
+  int scrollbar_reserved_thickness_;
+
+  // Used to remember which toolbar is in use
+  const ToolbarButtonInfo* current_tb_info_;
+  size_t current_tb_info_size_;
+
+  PaintManager paint_manager_;
+
+  struct BackgroundPart {
+    pp::Rect location;
+    unsigned int color;
+  };
+  std::vector<BackgroundPart> background_parts_;
+
+  struct PrintSettings {
+    PrintSettings() {
+      Clear();
+    }
+    void Clear() {
+      is_printing = false;
+      print_pages_called_ = false;
+      memset(&pepper_print_settings, 0, sizeof(pepper_print_settings));
+    }
+    // This is set to true when PrintBegin is called and false when PrintEnd is
+    // called.
+    bool is_printing;
+    // To know whether this was an actual print operation, so we don't double
+    // count UMA logging.
+    bool print_pages_called_;
+    PP_PrintSettings_Dev pepper_print_settings;
+  };
+
+  PrintSettings print_settings_;
+
+  scoped_ptr<PDFEngine> engine_;
+
+  // This engine is used to render the individual preview page data. This is
+  // used only in print preview mode. This will use |PreviewModeClient|
+  // interface which has very limited access to the pp::Instance.
+  scoped_ptr<PDFEngine> preview_engine_;
+
+  std::string url_;
+
+  scoped_ptr<FadingControls> toolbar_;
+  ThumbnailControl thumbnails_;
+  ProgressControl progress_bar_;
+  uint32 delayed_progress_timer_id_;
+  PageIndicator page_indicator_;
+
+  // Used for creating images from numbers.
+  scoped_ptr<NumberImageGenerator> number_image_generator_;
+
+  // Used for submitting forms.
+  pp::CompletionCallbackFactory<Instance> form_factory_;
+  pp::URLLoader form_loader_;
+
+  // Used for printing without re-entrancy issues.
+  pp::CompletionCallbackFactory<Instance> print_callback_factory_;
+
+  // True if we haven't painted the plugin viewport yet.
+  bool first_paint_;
+
+  // True when we've painted at least one page from the document.
+  bool painted_first_page_;
+
+  // True if we should display page indicator, false otherwise
+  bool show_page_indicator_;
+
+  // Callback when the document load completes.
+  pp::Var on_load_callback_;
+  pp::Var on_scroll_callback_;
+  pp::Var on_plugin_size_changed_callback_;
+
+  DocumentLoadState document_load_state_;
+  DocumentLoadState preview_document_load_state_;
+
+  // JavaScript interface to control this instance.
+  // This wraps a PDFScriptableObject in a pp::Var.
+  pp::VarPrivate instance_object_;
+
+  // Used so that we only tell the browser once about an unsupported feature, to
+  // avoid the infobar going up more than once.
+  bool told_browser_about_unsupported_feature_;
+
+  // Keeps track of which unsupported features we reported, so we avoid spamming
+  // the stats if a feature shows up many times per document.
+  std::set<std::string> unsupported_features_reported_;
+
+  // Number of pages in print preview mode, 0 if not in print preview mode.
+  int print_preview_page_count_;
+  std::vector<int> print_preview_page_numbers_;
+
+  // Used to manage loaded print preview page information. A |PreviewPageInfo|
+  // consists of data source url string and the page index in the destination
+  // document.
+  typedef std::pair<std::string, int> PreviewPageInfo;
+  std::queue<PreviewPageInfo> preview_pages_info_;
+
+  // Used to signal the browser about focus changes to trigger the OSK.
+  // TODO(abodenha@chromium.org) Implement full IME support in the plugin.
+  // http://crbug.com/132565
+  scoped_ptr<pp::TextInput_Dev> text_input_;
+};
+
+// This implements the JavaScript class entrypoint for the plugin instance.
+// This class is just a thin wrapper. It delegates relevant methods to Instance.
+class PDFScriptableObject : public pp::deprecated::ScriptableObject {
+ public:
+  explicit PDFScriptableObject(Instance* instance);
+  virtual ~PDFScriptableObject();
+
+  // pp::deprecated::ScriptableObject implementation.
+  virtual bool HasMethod(const pp::Var& method, pp::Var* exception);
+  virtual pp::Var Call(const pp::Var& method,
+                       const std::vector<pp::Var>& args,
+                       pp::Var* exception);
+
+ private:
+  Instance* instance_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_INSTANCE_H_

pdf/libpdf.map

@@ -0,0 +1,10 @@
+{
+global:
+  GetPDFDocInfo;
+  PPP_GetInterface;
+  PPP_InitializeModule;
+  PPP_ShutdownModule;
+  RenderPDFPageToBitmap;
+local:
+  *;
+};

pdf/number_image_generator.cc

@@ -0,0 +1,81 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/number_image_generator.h"
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+#include "pdf/draw_utils.h"
+#include "pdf/instance.h"
+
+namespace chrome_pdf {
+
+const int kPageNumberSeparator = 0;
+const int kPageNumberOriginX = 8;
+const int kPageNumberOriginY = 4;
+
+NumberImageGenerator::NumberImageGenerator(Instance* instance)
+    : instance_(instance),
+      device_scale_(1.0f) {
+}
+
+NumberImageGenerator::~NumberImageGenerator() {
+}
+
+void NumberImageGenerator::Configure(const pp::ImageData& number_background,
+    const std::vector<pp::ImageData>& number_images, float device_scale) {
+  number_background_ = number_background;
+  number_images_ = number_images;
+  device_scale_ = device_scale;
+}
+
+void NumberImageGenerator::GenerateImage(
+    int page_number, pp::ImageData* image) {
+  char buffer[12];
+  base::snprintf(buffer, sizeof(buffer), "%u", page_number);
+  int extra_width = 0;
+  DCHECK(number_images_.size() >= 10);
+  DCHECK(!number_background_.is_null());
+  for (size_t i = 1; i < strlen(buffer); ++i) {
+    int index = buffer[i] - '0';
+    extra_width += number_images_[index].size().width();
+    extra_width += static_cast<int>(kPageNumberSeparator * device_scale_);
+  }
+
+  *image = pp::ImageData(
+      instance_,
+      PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+      pp::Size(number_background_.size().width() + extra_width,
+               number_background_.size().height()),
+      false);
+
+  int stretch_point = number_background_.size().width() / 2;
+
+  pp::Rect src_rc(0, 0, stretch_point, number_background_.size().height());
+  pp::Rect dest_rc(src_rc);
+  CopyImage(number_background_, src_rc, image, dest_rc, false);
+  src_rc.Offset(number_background_.size().width() - stretch_point, 0);
+  dest_rc.Offset(image->size().width() - stretch_point, 0);
+  CopyImage(number_background_, src_rc, image, dest_rc, false);
+  src_rc = pp::Rect(stretch_point, 0, 1, number_background_.size().height());
+  dest_rc = src_rc;
+  dest_rc.set_width(extra_width + 1);
+  CopyImage(number_background_, src_rc, image, dest_rc, true);
+
+  pp::Point origin(static_cast<int>(kPageNumberOriginX * device_scale_),
+                   static_cast<int>(kPageNumberOriginY * device_scale_));
+  for (size_t i = 0; i < strlen(buffer); ++i) {
+    int index = buffer[i] - '0';
+    CopyImage(
+        number_images_[index],
+        pp::Rect(pp::Point(), number_images_[index].size()),
+        image, pp::Rect(origin, number_images_[index].size()), false);
+    origin += pp::Point(
+        number_images_[index].size().width() +
+        static_cast<int>(kPageNumberSeparator * device_scale_), 0);
+  }
+}
+
+}  // namespace chrome_pdf
+

pdf/number_image_generator.h

@@ -0,0 +1,37 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_NUMBER_IMAGE_GENERATOR_H
+#define PDF_NUMBER_IMAGE_GENERATOR_H
+
+#include <vector>
+
+#include "ppapi/cpp/image_data.h"
+
+namespace chrome_pdf {
+
+class Instance;
+
+class NumberImageGenerator {
+ public:
+  explicit NumberImageGenerator(Instance* instance);
+  virtual ~NumberImageGenerator();
+
+  void Configure(const pp::ImageData& number_background,
+                 const std::vector<pp::ImageData>& number_images,
+                 float device_scale);
+
+  void GenerateImage(int page_number, pp::ImageData* image);
+
+ private:
+  Instance* instance_;
+  pp::ImageData number_background_;
+  std::vector<pp::ImageData> number_images_;
+  float device_scale_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_NUMBER_IMAGE_GENERATOR_H
+

pdf/out_of_process_instance.h

@@ -0,0 +1,338 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_OUT_OF_PROCESS_INSTANCE_H_
+#define PDF_OUT_OF_PROCESS_INSTANCE_H_
+
+#include <queue>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "pdf/paint_manager.h"
+#include "pdf/pdf_engine.h"
+#include "pdf/preview_mode_client.h"
+
+#include "ppapi/c/private/ppb_pdf.h"
+#include "ppapi/cpp/dev/printing_dev.h"
+#include "ppapi/cpp/dev/scriptable_object_deprecated.h"
+#include "ppapi/cpp/dev/selection_dev.h"
+#include "ppapi/cpp/graphics_2d.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/private/find_private.h"
+#include "ppapi/cpp/private/instance_private.h"
+#include "ppapi/cpp/private/uma_private.h"
+#include "ppapi/cpp/private/var_private.h"
+#include "ppapi/cpp/url_loader.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+namespace pp {
+class TextInput_Dev;
+}
+
+namespace chrome_pdf {
+
+class OutOfProcessInstance : public pp::InstancePrivate,
+                             public pp::Find_Private,
+                             public pp::Printing_Dev,
+                             public pp::Selection_Dev,
+                             public PaintManager::Client,
+                             public PDFEngine::Client,
+                             public PreviewModeClient::Client {
+ public:
+  explicit OutOfProcessInstance(PP_Instance instance);
+  virtual ~OutOfProcessInstance();
+
+  // pp::Instance implementation.
+  virtual bool Init(uint32_t argc,
+                    const char* argn[],
+                    const char* argv[]) OVERRIDE;
+  virtual void HandleMessage(const pp::Var& message) OVERRIDE;
+  virtual bool HandleInputEvent(const pp::InputEvent& event) OVERRIDE;
+  virtual void DidChangeView(const pp::View& view) OVERRIDE;
+  virtual pp::Var GetInstanceObject() OVERRIDE;
+
+  // pp::Find_Private implementation.
+  virtual bool StartFind(const std::string& text, bool case_sensitive) OVERRIDE;
+  virtual void SelectFindResult(bool forward) OVERRIDE;
+  virtual void StopFind() OVERRIDE;
+
+  // pp::PaintManager::Client implementation.
+  virtual void OnPaint(const std::vector<pp::Rect>& paint_rects,
+                       std::vector<PaintManager::ReadyRect>* ready,
+                       std::vector<pp::Rect>* pending) OVERRIDE;
+
+  // pp::Printing_Dev implementation.
+  virtual uint32_t QuerySupportedPrintOutputFormats() OVERRIDE;
+  virtual int32_t PrintBegin(
+      const PP_PrintSettings_Dev& print_settings) OVERRIDE;
+  virtual pp::Resource PrintPages(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count) OVERRIDE;
+  virtual void PrintEnd() OVERRIDE;
+  virtual bool IsPrintScalingDisabled() OVERRIDE;
+
+  // pp::Private implementation.
+  virtual pp::Var GetLinkAtPosition(const pp::Point& point);
+
+  // PPP_Selection_Dev implementation.
+  virtual pp::Var GetSelectedText(bool html) OVERRIDE;
+
+  void FlushCallback(int32_t result);
+  void DidOpen(int32_t result);
+  void DidOpenPreview(int32_t result);
+
+  // Called when the timer is fired.
+  void OnClientTimerFired(int32_t id);
+
+  // Called to print without re-entrancy issues.
+  void OnPrint(int32_t);
+
+  // PDFEngine::Client implementation.
+  virtual void DocumentSizeUpdated(const pp::Size& size);
+  virtual void Invalidate(const pp::Rect& rect);
+  virtual void Scroll(const pp::Point& point);
+  virtual void ScrollToX(int position);
+  virtual void ScrollToY(int position);
+  virtual void ScrollToPage(int page);
+  virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
+  virtual void UpdateCursor(PP_CursorType_Dev cursor);
+  virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
+  virtual void NotifyNumberOfFindResultsChanged(int total, bool final_result);
+  virtual void NotifySelectedFindResultChanged(int current_find_index);
+  virtual void GetDocumentPassword(
+      pp::CompletionCallbackWithOutput<pp::Var> callback);
+  virtual void Alert(const std::string& message);
+  virtual bool Confirm(const std::string& message);
+  virtual std::string Prompt(const std::string& question,
+                             const std::string& default_answer);
+  virtual std::string GetURL();
+  virtual void Email(const std::string& to,
+                     const std::string& cc,
+                     const std::string& bcc,
+                     const std::string& subject,
+                     const std::string& body);
+  virtual void Print();
+  virtual void SubmitForm(const std::string& url,
+                          const void* data,
+                          int length);
+  virtual std::string ShowFileSelectionDialog();
+  virtual pp::URLLoader CreateURLLoader();
+  virtual void ScheduleCallback(int id, int delay_in_ms);
+  virtual void SearchString(const base::char16* string,
+                            const base::char16* term,
+                            bool case_sensitive,
+                            std::vector<SearchStringResult>* results);
+  virtual void DocumentPaintOccurred();
+  virtual void DocumentLoadComplete(int page_count);
+  virtual void DocumentLoadFailed();
+  virtual pp::Instance* GetPluginInstance();
+  virtual void DocumentHasUnsupportedFeature(const std::string& feature);
+  virtual void DocumentLoadProgress(uint32 available, uint32 doc_size);
+  virtual void FormTextFieldFocusChange(bool in_focus);
+  virtual bool IsPrintPreview();
+
+  // PreviewModeClient::Client implementation.
+  virtual void PreviewDocumentLoadComplete() OVERRIDE;
+  virtual void PreviewDocumentLoadFailed() OVERRIDE;
+
+  // Helper functions for implementing PPP_PDF.
+  void RotateClockwise();
+  void RotateCounterclockwise();
+
+ private:
+  void ResetRecentlySentFindUpdate(int32_t);
+
+  // Called whenever the plugin geometry changes to update the location of the
+  // background parts, and notifies the pdf engine.
+  void OnGeometryChanged(double old_zoom, float old_device_scale);
+
+  // Figures out the location of any background rectangles (i.e. those that
+  // aren't painted by the PDF engine).
+  void CalculateBackgroundParts();
+
+  // Computes document width/height in device pixels, based on current zoom and
+  // device scale
+  int GetDocumentPixelWidth() const;
+  int GetDocumentPixelHeight() const;
+
+  // Draws a rectangle with the specified dimensions and color in our buffer.
+  void FillRect(const pp::Rect& rect, unsigned int color);
+
+  void LoadUrl(const std::string& url);
+  void LoadPreviewUrl(const std::string& url);
+  void LoadUrlInternal(const std::string& url, pp::URLLoader* loader,
+                       void (OutOfProcessInstance::* method)(int32_t));
+
+  // Creates a URL loader and allows it to access all urls, i.e. not just the
+  // frame's origin.
+  pp::URLLoader CreateURLLoaderInternal();
+
+  // Figure out the initial page to display based on #page=N and #nameddest=foo
+  // in the |url_|.
+  // Returns -1 if there is no valid fragment. The returned value is 0-based,
+  // whereas page=N is 1-based.
+  int GetInitialPage(const std::string& url);
+
+  void FormDidOpen(int32_t result);
+
+  std::string GetLocalizedString(PP_ResourceString id);
+
+  void UserMetricsRecordAction(const std::string& action);
+
+  enum DocumentLoadState {
+    LOAD_STATE_LOADING,
+    LOAD_STATE_COMPLETE,
+    LOAD_STATE_FAILED,
+  };
+
+  // Set new zoom scale.
+  void SetZoom(double scale);
+
+  // Reduces the document to 1 page and appends |print_preview_page_count_|
+  // blank pages to the document for print preview.
+  void AppendBlankPrintPreviewPages();
+
+  // Process the preview page data information. |src_url| specifies the preview
+  // page data location. The |src_url| is in the format:
+  // chrome://print/id/page_number/print.pdf
+  // |dst_page_index| specifies the blank page index that needs to be replaced
+  // with the new page data.
+  void ProcessPreviewPageInfo(const std::string& src_url, int dst_page_index);
+  // Load the next available preview page into the blank page.
+  void LoadAvailablePreviewPage();
+
+  pp::ImageData image_data_;
+  // Used when the plugin is embedded in a page and we have to create the loader
+  // ourself.
+  pp::CompletionCallbackFactory<OutOfProcessInstance> loader_factory_;
+  pp::URLLoader embed_loader_;
+  pp::URLLoader embed_preview_loader_;
+
+  PP_CursorType_Dev cursor_;  // The current cursor.
+
+  pp::CompletionCallbackFactory<OutOfProcessInstance> timer_factory_;
+
+  // Size, in pixels, of plugin rectangle.
+  pp::Size plugin_size_;
+  // Size, in DIPs, of plugin rectangle.
+  pp::Size plugin_dip_size_;
+  // Remaining area, in pixels, to render the pdf in after accounting for
+  // horizontal centering.
+  pp::Rect available_area_;
+  // Size of entire document in pixels (i.e. if each page is 800 pixels high and
+  // there are 10 pages, the height will be 8000).
+  pp::Size document_size_;
+
+  double zoom_;  // Current zoom factor.
+
+  float device_scale_;  // Current device scale factor.
+  bool printing_enabled_;
+  // True if the plugin is full-page.
+  bool full_;
+
+  PaintManager paint_manager_;
+
+  struct BackgroundPart {
+    pp::Rect location;
+    unsigned int color;
+  };
+  std::vector<BackgroundPart> background_parts_;
+
+  struct PrintSettings {
+    PrintSettings() {
+      Clear();
+    }
+    void Clear() {
+      is_printing = false;
+      print_pages_called_ = false;
+      memset(&pepper_print_settings, 0, sizeof(pepper_print_settings));
+    }
+    // This is set to true when PrintBegin is called and false when PrintEnd is
+    // called.
+    bool is_printing;
+    // To know whether this was an actual print operation, so we don't double
+    // count UMA logging.
+    bool print_pages_called_;
+    PP_PrintSettings_Dev pepper_print_settings;
+  };
+
+  PrintSettings print_settings_;
+
+  scoped_ptr<PDFEngine> engine_;
+
+  // This engine is used to render the individual preview page data. This is
+  // used only in print preview mode. This will use |PreviewModeClient|
+  // interface which has very limited access to the pp::Instance.
+  scoped_ptr<PDFEngine> preview_engine_;
+
+  std::string url_;
+
+  // Used for submitting forms.
+  pp::CompletionCallbackFactory<OutOfProcessInstance> form_factory_;
+  pp::URLLoader form_loader_;
+
+  // Used for printing without re-entrancy issues.
+  pp::CompletionCallbackFactory<OutOfProcessInstance> print_callback_factory_;
+
+  // True if we haven't painted the plugin viewport yet.
+  bool first_paint_;
+
+  DocumentLoadState document_load_state_;
+  DocumentLoadState preview_document_load_state_;
+
+  // JavaScript interface to control this instance.
+  // This wraps a PDFScriptableObject in a pp::Var.
+  pp::VarPrivate instance_object_;
+
+  // A UMA resource for histogram reporting.
+  pp::UMAPrivate uma_;
+
+  // Used so that we only tell the browser once about an unsupported feature, to
+  // avoid the infobar going up more than once.
+  bool told_browser_about_unsupported_feature_;
+
+  // Keeps track of which unsupported features we reported, so we avoid spamming
+  // the stats if a feature shows up many times per document.
+  std::set<std::string> unsupported_features_reported_;
+
+  // Number of pages in print preview mode, 0 if not in print preview mode.
+  int print_preview_page_count_;
+  std::vector<int> print_preview_page_numbers_;
+
+  // Used to manage loaded print preview page information. A |PreviewPageInfo|
+  // consists of data source url string and the page index in the destination
+  // document.
+  typedef std::pair<std::string, int> PreviewPageInfo;
+  std::queue<PreviewPageInfo> preview_pages_info_;
+
+  // Used to signal the browser about focus changes to trigger the OSK.
+  // TODO(abodenha@chromium.org) Implement full IME support in the plugin.
+  // http://crbug.com/132565
+  scoped_ptr<pp::TextInput_Dev> text_input_;
+
+  // The last document load progress value sent to the web page.
+  double last_progress_sent_;
+
+  // Whether an update to the number of find results found was sent less than
+  // |kFindResultCooldownMs| milliseconds ago.
+  bool recently_sent_find_update_;
+
+  // The tickmarks.
+  std::vector<pp::Rect> tickmarks_;
+
+  // Whether the plugin has received a viewport changed message. Nothing should
+  // be painted until this is received.
+  bool received_viewport_message_;
+
+  // The callback for receiving the password from the page.
+  scoped_ptr<pp::CompletionCallbackWithOutput<pp::Var> > password_callback_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_OUT_OF_PROCESS_INSTANCE_H_

pdf/page_indicator.cc

@@ -0,0 +1,126 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/page_indicator.h"
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+#include "pdf/draw_utils.h"
+#include "pdf/number_image_generator.h"
+#include "pdf/resource_consts.h"
+
+namespace chrome_pdf {
+
+
+PageIndicator::PageIndicator()
+    : current_page_(0),
+      splash_timeout_(kPageIndicatorSplashTimeoutMs),
+      fade_timeout_(kPageIndicatorScrollFadeTimeoutMs),
+      always_visible_(false) {
+}
+
+PageIndicator::~PageIndicator() {
+}
+
+bool PageIndicator::CreatePageIndicator(
+    uint32 id,
+    bool visible,
+    Control::Owner* delegate,
+    NumberImageGenerator* number_image_generator,
+    bool always_visible) {
+  number_image_generator_ = number_image_generator;
+  always_visible_ = always_visible;
+
+  pp::Rect rc;
+  bool res = Control::Create(id, rc, visible, delegate);
+  return res;
+}
+
+void PageIndicator::Configure(const pp::Point& origin,
+                              const pp::ImageData& background) {
+  background_ = background;
+  pp::Rect rc(origin, background_.size());
+  Control::SetRect(rc, false);
+}
+
+void PageIndicator::set_current_page(int current_page) {
+  if (current_page_ < 0)
+    return;
+
+  current_page_ = current_page;
+}
+
+void PageIndicator::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
+  if (!visible())
+    return;
+
+  pp::Rect draw_rc = rc.Intersect(rect());
+  if (draw_rc.IsEmpty())
+    return;
+
+  // Copying the background image to a temporary buffer.
+  pp::ImageData buffer(owner()->GetInstance(), background_.format(),
+                       background_.size(), false);
+  CopyImage(background_, pp::Rect(background_.size()),
+            &buffer, pp::Rect(background_.size()), false);
+
+  // Creating the page number image.
+  pp::ImageData page_number_image;
+  number_image_generator_->GenerateImage(current_page_, &page_number_image);
+
+  pp::Point origin2(
+      (buffer.size().width() - page_number_image.size().width()) / 2.5,
+      (buffer.size().height() - page_number_image.size().height()) / 2);
+
+  // Drawing page number image on the buffer.
+  if (origin2.x() > 0 && origin2.y() > 0) {
+    CopyImage(page_number_image,
+              pp::Rect(pp::Point(), page_number_image.size()),
+              &buffer,
+              pp::Rect(origin2, page_number_image.size()),
+              false);
+  }
+
+  // Drawing the buffer.
+  pp::Point origin = draw_rc.point();
+  draw_rc.Offset(-rect().x(), -rect().y());
+  AlphaBlend(buffer, draw_rc, image_data, origin, transparency());
+}
+
+void PageIndicator::OnTimerFired(uint32 timer_id) {
+  FadingControl::OnTimerFired(timer_id);
+  if (timer_id == fade_out_timer_id_) {
+    Fade(false, fade_timeout_);
+  }
+}
+
+void PageIndicator::ResetFadeOutTimer() {
+  fade_out_timer_id_ =
+      owner()->ScheduleTimer(id(), splash_timeout_);
+}
+
+void PageIndicator::OnFadeInComplete() {
+  if (!always_visible_)
+    ResetFadeOutTimer();
+}
+
+void PageIndicator::Splash() {
+  Splash(kPageIndicatorSplashTimeoutMs, kPageIndicatorScrollFadeTimeoutMs);
+}
+
+void PageIndicator::Splash(uint32 splash_timeout, uint32 fade_timeout) {
+  splash_timeout_ = splash_timeout;
+  fade_timeout_ = fade_timeout;
+  if (!always_visible_)
+    fade_out_timer_id_ = 0;
+  Fade(true, fade_timeout_);
+}
+
+int PageIndicator::GetYPosition(
+    int vertical_scrollbar_y, int document_height, int plugin_height) {
+  double percent = static_cast<double>(vertical_scrollbar_y) / document_height;
+  return (plugin_height - rect().height()) * percent;
+}
+
+}  // namespace chrome_pdf

pdf/page_indicator.h

@@ -0,0 +1,72 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PAGE_INDICATOR_H_
+#define PDF_PAGE_INDICATOR_H_
+
+#include <string>
+#include <vector>
+
+#include "pdf/control.h"
+#include "pdf/fading_control.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/point.h"
+#include "ppapi/cpp/rect.h"
+
+namespace chrome_pdf {
+
+class NumberImageGenerator;
+
+const uint32 kPageIndicatorScrollFadeTimeoutMs = 240;
+const uint32 kPageIndicatorInitialFadeTimeoutMs = 960;
+const uint32 kPageIndicatorSplashTimeoutMs = 2000;
+
+class PageIndicator : public FadingControl {
+ public:
+  PageIndicator();
+  virtual ~PageIndicator();
+  virtual bool CreatePageIndicator(
+      uint32 id,
+      bool visible,
+      Control::Owner* delegate,
+      NumberImageGenerator* number_image_generator,
+      bool always_visible);
+
+  void Configure(const pp::Point& origin, const pp::ImageData& background);
+
+  int current_page() const { return current_page_; }
+  void set_current_page(int current_page);
+
+  virtual void Splash();
+  void Splash(uint32 splash_timeout, uint32 page_timeout);
+
+  // Returns the y position where the page indicator should be drawn given the
+  // position of the scrollbar and the total document height and the plugin
+  // height.
+  int GetYPosition(
+      int vertical_scrollbar_y, int document_height, int plugin_height);
+
+  // Control interface.
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
+  virtual void OnTimerFired(uint32 timer_id);
+
+  // FadingControl interface.
+  virtual void OnFadeInComplete();
+
+ private:
+  void ResetFadeOutTimer();
+
+  int current_page_;
+  pp::ImageData background_;
+  NumberImageGenerator* number_image_generator_;
+  uint32 fade_out_timer_id_;
+  uint32 splash_timeout_;
+  uint32 fade_timeout_;
+
+  bool always_visible_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PAGE_INDICATOR_H_

pdf/paint_aggregator.cc

@@ -0,0 +1,263 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/paint_aggregator.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+
+// ----------------------------------------------------------------------------
+// ALGORITHM NOTES
+//
+// We attempt to maintain a scroll rect in the presence of invalidations that
+// are contained within the scroll rect.  If an invalidation crosses a scroll
+// rect, then we just treat the scroll rect as an invalidation rect.
+//
+// For invalidations performed prior to scrolling and contained within the
+// scroll rect, we offset the invalidation rects to account for the fact that
+// the consumer will perform scrolling before painting.
+//
+// We only support scrolling along one axis at a time.  A diagonal scroll will
+// therefore be treated as an invalidation.
+// ----------------------------------------------------------------------------
+
+PaintAggregator::PaintUpdate::PaintUpdate() {
+}
+
+PaintAggregator::PaintUpdate::~PaintUpdate() {
+}
+
+PaintAggregator::InternalPaintUpdate::InternalPaintUpdate() :
+    synthesized_scroll_damage_rect_(false) {
+}
+
+PaintAggregator::InternalPaintUpdate::~InternalPaintUpdate() {
+}
+
+pp::Rect PaintAggregator::InternalPaintUpdate::GetScrollDamage() const {
+  // Should only be scrolling in one direction at a time.
+  DCHECK(!(scroll_delta.x() && scroll_delta.y()));
+
+  pp::Rect damaged_rect;
+
+  // Compute the region we will expose by scrolling, and paint that into a
+  // shared memory section.
+  if (scroll_delta.x()) {
+    int32_t dx = scroll_delta.x();
+    damaged_rect.set_y(scroll_rect.y());
+    damaged_rect.set_height(scroll_rect.height());
+    if (dx > 0) {
+      damaged_rect.set_x(scroll_rect.x());
+      damaged_rect.set_width(dx);
+    } else {
+      damaged_rect.set_x(scroll_rect.right() + dx);
+      damaged_rect.set_width(-dx);
+    }
+  } else {
+    int32_t dy = scroll_delta.y();
+    damaged_rect.set_x(scroll_rect.x());
+    damaged_rect.set_width(scroll_rect.width());
+    if (dy > 0) {
+      damaged_rect.set_y(scroll_rect.y());
+      damaged_rect.set_height(dy);
+    } else {
+      damaged_rect.set_y(scroll_rect.bottom() + dy);
+      damaged_rect.set_height(-dy);
+    }
+  }
+
+  // In case the scroll offset exceeds the width/height of the scroll rect
+  return scroll_rect.Intersect(damaged_rect);
+}
+
+PaintAggregator::PaintAggregator() {
+}
+
+bool PaintAggregator::HasPendingUpdate() const {
+  return !update_.scroll_rect.IsEmpty() || !update_.paint_rects.empty();
+}
+
+void PaintAggregator::ClearPendingUpdate() {
+  update_ = InternalPaintUpdate();
+}
+
+PaintAggregator::PaintUpdate PaintAggregator::GetPendingUpdate() {
+  // Convert the internal paint update to the external one, which includes a
+  // bit more precomputed info for the caller.
+  PaintUpdate ret;
+  ret.scroll_delta = update_.scroll_delta;
+  ret.scroll_rect = update_.scroll_rect;
+  ret.has_scroll = ret.scroll_delta.x() != 0 || ret.scroll_delta.y() != 0;
+
+  // Include the scroll damage (if any) in the paint rects.
+  // Code invalidates damaged rect here, it pick it up from the list of paint
+  // rects in the next block.
+  if (ret.has_scroll  && !update_.synthesized_scroll_damage_rect_) {
+    update_.synthesized_scroll_damage_rect_ = true;
+    pp::Rect scroll_damage = update_.GetScrollDamage();
+    InvalidateRectInternal(scroll_damage, false);
+  }
+
+  ret.paint_rects.reserve(update_.paint_rects.size() + 1);
+  for (size_t i = 0; i < update_.paint_rects.size(); i++)
+    ret.paint_rects.push_back(update_.paint_rects[i]);
+
+  return ret;
+}
+
+void PaintAggregator::SetIntermediateResults(
+    const std::vector<ReadyRect>& ready,
+    const std::vector<pp::Rect>& pending) {
+  update_.ready_rects.insert(
+      update_.ready_rects.end(), ready.begin(), ready.end());
+  update_.paint_rects = pending;
+}
+
+std::vector<PaintAggregator::ReadyRect> PaintAggregator::GetReadyRects() const {
+  return update_.ready_rects;
+}
+
+void PaintAggregator::InvalidateRect(const pp::Rect& rect) {
+  InvalidateRectInternal(rect, true);
+}
+
+void PaintAggregator::ScrollRect(const pp::Rect& clip_rect,
+                                 const pp::Point& amount) {
+  // We only support scrolling along one axis at a time.
+  if (amount.x() != 0 && amount.y() != 0) {
+    InvalidateRect(clip_rect);
+    return;
+  }
+
+  // We can only scroll one rect at a time.
+  if (!update_.scroll_rect.IsEmpty() && update_.scroll_rect != clip_rect) {
+    InvalidateRect(clip_rect);
+    return;
+  }
+
+  // Again, we only support scrolling along one axis at a time.  Make sure this
+  // update doesn't scroll on a different axis than any existing one.
+  if ((amount.x() && update_.scroll_delta.y()) ||
+      (amount.y() && update_.scroll_delta.x())) {
+    InvalidateRect(clip_rect);
+    return;
+  }
+
+  // The scroll rect is new or isn't changing (though the scroll amount may
+  // be changing).
+  update_.scroll_rect = clip_rect;
+  update_.scroll_delta += amount;
+
+  // We might have just wiped out a pre-existing scroll.
+  if (update_.scroll_delta == pp::Point()) {
+    update_.scroll_rect = pp::Rect();
+    return;
+  }
+
+  // Adjust any paint rects that intersect the scroll. For the portion of the
+  // paint that is inside the scroll area, move it by the scroll amount and
+  // replace the existing paint with it. For the portion (if any) that is
+  // outside the scroll, just invalidate it.
+  std::vector<pp::Rect> leftover_rects;
+  for (size_t i = 0; i < update_.paint_rects.size(); ++i) {
+    if (!update_.scroll_rect.Intersects(update_.paint_rects[i]))
+      continue;
+
+    pp::Rect intersection =
+        update_.paint_rects[i].Intersect(update_.scroll_rect);
+    pp::Rect rect = update_.paint_rects[i];
+    while (!rect.IsEmpty()) {
+      pp::Rect leftover = rect.Subtract(intersection);
+      if (leftover.IsEmpty())
+        break;
+      // Don't want to call InvalidateRectInternal now since it'll modify
+      // update_.paint_rects, so keep track of this and do it below.
+      leftover_rects.push_back(leftover);
+      rect = rect.Subtract(leftover);
+    }
+
+    update_.paint_rects[i] = ScrollPaintRect(intersection, amount);
+
+    // The rect may have been scrolled out of view.
+    if (update_.paint_rects[i].IsEmpty()) {
+      update_.paint_rects.erase(update_.paint_rects.begin() + i);
+      i--;
+    }
+  }
+
+  for (size_t i = 0; i < leftover_rects.size(); ++i)
+    InvalidateRectInternal(leftover_rects[i], false);
+
+  for (size_t i = 0; i < update_.ready_rects.size(); ++i) {
+    if (update_.scroll_rect.Contains(update_.ready_rects[i].rect)) {
+      update_.ready_rects[i].rect =
+          ScrollPaintRect(update_.ready_rects[i].rect, amount);
+    }
+  }
+
+  if (update_.synthesized_scroll_damage_rect_) {
+    pp::Rect damage = update_.GetScrollDamage();
+    InvalidateRect(damage);
+  }
+}
+
+pp::Rect PaintAggregator::ScrollPaintRect(const pp::Rect& paint_rect,
+                                          const pp::Point& amount) const {
+  pp::Rect result = paint_rect;
+  result.Offset(amount);
+  result = update_.scroll_rect.Intersect(result);
+  return result;
+}
+
+void PaintAggregator::InvalidateScrollRect() {
+  pp::Rect scroll_rect = update_.scroll_rect;
+  update_.scroll_rect = pp::Rect();
+  update_.scroll_delta = pp::Point();
+  InvalidateRect(scroll_rect);
+}
+
+void PaintAggregator::InvalidateRectInternal(const pp::Rect& rect_old,
+                                             bool check_scroll) {
+  pp::Rect rect = rect_old;
+  // Check if any rects that are ready to be painted overlap.
+  for (size_t i = 0; i < update_.ready_rects.size(); ++i) {
+    const pp::Rect& existing_rect = update_.ready_rects[i].rect;
+    if (rect.Intersects(existing_rect)) {
+      // Re-invalidate in case the union intersects other paint rects.
+      rect = existing_rect.Union(rect);
+      update_.ready_rects.erase(update_.ready_rects.begin() + i);
+      break;
+    }
+  }
+
+  bool add_paint = true;
+
+  // Combine overlapping paints using smallest bounding box.
+  for (size_t i = 0; i < update_.paint_rects.size(); ++i) {
+    const pp::Rect& existing_rect = update_.paint_rects[i];
+    if (existing_rect.Contains(rect))  // Optimize out redundancy.
+      add_paint = false;
+    if (rect.Intersects(existing_rect) || rect.SharesEdgeWith(existing_rect)) {
+      // Re-invalidate in case the union intersects other paint rects.
+      pp::Rect combined_rect = existing_rect.Union(rect);
+      update_.paint_rects.erase(update_.paint_rects.begin() + i);
+      InvalidateRectInternal(combined_rect, check_scroll);
+      add_paint = false;
+    }
+  }
+
+  if (add_paint) {
+    // Add a non-overlapping paint.
+    update_.paint_rects.push_back(rect);
+  }
+
+  // If the new paint overlaps with a scroll, then also invalidate the rect in
+  // its new position.
+  if (check_scroll &&
+      !update_.scroll_rect.IsEmpty() &&
+      update_.scroll_rect.Intersects(rect)) {
+    InvalidateRectInternal(ScrollPaintRect(rect, update_.scroll_delta), false);
+  }
+}

pdf/paint_aggregator.h

@@ -0,0 +1,130 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PAINT_AGGREGATOR_H_
+#define PDF_PAINT_AGGREGATOR_H_
+
+#include <vector>
+
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/rect.h"
+#include "ppapi/cpp/rect.h"
+
+// This class is responsible for aggregating multiple invalidation and scroll
+// commands to produce a scroll and repaint sequence. You can use this manually
+// to track your updates, but most applications will use the PaintManager to
+// additionally handle the necessary callbacks on top of the PaintAggregator
+// functionality.
+//
+// See http://code.google.com/p/ppapi/wiki/2DPaintingModel
+class PaintAggregator {
+ public:
+  // Stores information about a rectangle that has finished painting.  The
+  // PaintManager will paint it only when everything else on the screen is also
+  // ready.
+  struct ReadyRect {
+    pp::Point offset;
+    pp::Rect rect;
+    pp::ImageData image_data;
+  };
+
+  struct PaintUpdate {
+    PaintUpdate();
+    ~PaintUpdate();
+
+    // True if there is a scroll applied. This indicates that the scroll delta
+    // and scroll_rect are nonzero (just as a convenience).
+    bool has_scroll;
+
+    // The amount to scroll by. Either the X or Y may be nonzero to indicate a
+    // scroll in that direction, but there will never be a scroll in both
+    // directions at the same time (this will be converted to a paint of the
+    // region instead).
+    //
+    // If there is no scroll, this will be (0, 0).
+    pp::Point scroll_delta;
+
+    // The rectangle that should be scrolled by the scroll_delta. If there is no
+    // scroll, this will be (0, 0, 0, 0). We only track one scroll command at
+    // once. If there are multiple ones, they will be converted to invalidates.
+    pp::Rect scroll_rect;
+
+    // A list of all the individual dirty rectangles. This is an aggregated list
+    // of all invalidate calls. Different rectangles may be unified to produce a
+    // minimal list with no overlap that is more efficient to paint. This list
+    // also contains the region exposed by any scroll command.
+    std::vector<pp::Rect> paint_rects;
+  };
+
+  PaintAggregator();
+
+  // There is a PendingUpdate if InvalidateRect or ScrollRect were called and
+  // ClearPendingUpdate was not called.
+  bool HasPendingUpdate() const;
+  void ClearPendingUpdate();
+
+  PaintUpdate GetPendingUpdate();
+
+  // Sets the result of a call to the plugin to paint.  This includes rects that
+  // are finished painting (ready), and ones that are still in-progress
+  // (pending).
+  void SetIntermediateResults(const std::vector<ReadyRect>& ready,
+                              const std::vector<pp::Rect>& pending);
+
+  // Returns the rectangles that are ready to be painted.
+  std::vector<ReadyRect> GetReadyRects() const;
+
+  // The given rect should be repainted.
+  void InvalidateRect(const pp::Rect& rect);
+
+  // The given rect should be scrolled by the given amounts.
+  void ScrollRect(const pp::Rect& clip_rect, const pp::Point& amount);
+
+ private:
+  // This structure is an internal version of PaintUpdate. It's different in
+  // two respects:
+  //
+  //  - The scroll damange (area exposed by the scroll operation, if any) is
+  //    maintained separately from the dirty rects generated by calling
+  //    InvalidateRect. We need to know this distinction for some operations.
+  //
+  //  - The paint bounds union is computed on the fly so we don't have to keep
+  //    a rectangle up-to-date as we do different operations.
+  class InternalPaintUpdate {
+   public:
+    InternalPaintUpdate();
+    ~InternalPaintUpdate();
+
+    // Computes the rect damaged by scrolling within |scroll_rect| by
+    // |scroll_delta|. This rect must be repainted. It is not included in
+    // paint_rects.
+    pp::Rect GetScrollDamage() const;
+
+    pp::Point scroll_delta;
+    pp::Rect scroll_rect;
+
+    // Does not include the scroll damage rect unless
+    // synthesized_scroll_damage_rect_ is set.
+    std::vector<pp::Rect> paint_rects;
+
+    // Rectangles that are finished painting.
+    std::vector<ReadyRect> ready_rects;
+
+    // Whether we have added the scroll damage rect to paint_rects yet or not.
+    bool synthesized_scroll_damage_rect_;
+  };
+
+  pp::Rect ScrollPaintRect(const pp::Rect& paint_rect,
+                           const pp::Point& amount) const;
+  void InvalidateScrollRect();
+
+  // Internal method used by InvalidateRect. If |check_scroll| is true, then the
+  // method checks if there's a pending scroll and if so also invalidates |rect|
+  // in the new scroll position.
+  void InvalidateRectInternal(const pp::Rect& rect, bool check_scroll);
+
+  InternalPaintUpdate update_;
+};
+
+#endif  // PDF_PAINT_AGGREGATOR_H_

pdf/paint_manager.cc

@@ -0,0 +1,296 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/paint_manager.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+
+PaintManager::PaintManager(pp::Instance* instance,
+                           Client* client,
+                           bool is_always_opaque)
+    : instance_(instance),
+      client_(client),
+      is_always_opaque_(is_always_opaque),
+      callback_factory_(NULL),
+      manual_callback_pending_(false),
+      flush_pending_(false),
+      has_pending_resize_(false),
+      graphics_need_to_be_bound_(false),
+      pending_device_scale_(1.0),
+      device_scale_(1.0),
+      in_paint_(false),
+      first_paint_(true),
+      view_size_changed_waiting_for_paint_(false) {
+  // Set the callback object outside of the initializer list to avoid a
+  // compiler warning about using "this" in an initializer list.
+  callback_factory_.Initialize(this);
+
+  // You can not use a NULL client pointer.
+  DCHECK(client);
+}
+
+PaintManager::~PaintManager() {
+}
+
+// static
+pp::Size PaintManager::GetNewContextSize(const pp::Size& current_context_size,
+                                         const pp::Size& plugin_size) {
+  // The number of additional space in pixels to allocate to the right/bottom
+  // of the context.
+  const int kBufferSize = 100;
+
+  // Default to returning the same size.
+  pp::Size result = current_context_size;
+
+  pp::Size min_size(std::max(current_context_size.width() - kBufferSize, 0),
+                    std::max(current_context_size.height() - kBufferSize, 0));
+  // If the plugin size is bigger than the current context size, we need to
+  // resize the context. If the plugin size is smaller than the current
+  // context size by a given threshhold then resize the context so that we
+  // aren't wasting too much memory.
+  if (plugin_size.width() > current_context_size.width() ||
+      plugin_size.height() > current_context_size.height() ||
+      plugin_size.width() < min_size.width() ||
+      plugin_size.height() < min_size.height()) {
+      // Create a larger context than needed so that if we only resize by a
+      // small margin, we don't need a new context.
+      result = pp::Size(plugin_size.width() + kBufferSize,
+                        plugin_size.height() + kBufferSize);
+  }
+
+  return result;
+}
+
+void PaintManager::Initialize(pp::Instance* instance,
+                              Client* client,
+                              bool is_always_opaque) {
+  DCHECK(!instance_ && !client_);  // Can't initialize twice.
+  instance_ = instance;
+  client_ = client;
+  is_always_opaque_ = is_always_opaque;
+}
+
+void PaintManager::SetSize(const pp::Size& new_size, float device_scale) {
+  if (GetEffectiveSize() == new_size &&
+      GetEffectiveDeviceScale() == device_scale)
+    return;
+
+  has_pending_resize_ = true;
+  pending_size_ = new_size;
+  pending_device_scale_ = device_scale;
+
+  view_size_changed_waiting_for_paint_ = true;
+
+  Invalidate();
+}
+
+void PaintManager::Invalidate() {
+  // You must call SetSize before using.
+  DCHECK(!graphics_.is_null() || has_pending_resize_);
+
+  EnsureCallbackPending();
+  aggregator_.InvalidateRect(pp::Rect(GetEffectiveSize()));
+}
+
+void PaintManager::InvalidateRect(const pp::Rect& rect) {
+  DCHECK(!in_paint_);
+
+  // You must call SetSize before using.
+  DCHECK(!graphics_.is_null() || has_pending_resize_);
+
+  // Clip the rect to the device area.
+  pp::Rect clipped_rect = rect.Intersect(pp::Rect(GetEffectiveSize()));
+  if (clipped_rect.IsEmpty())
+    return;  // Nothing to do.
+
+  EnsureCallbackPending();
+  aggregator_.InvalidateRect(clipped_rect);
+}
+
+void PaintManager::ScrollRect(const pp::Rect& clip_rect,
+                              const pp::Point& amount) {
+  DCHECK(!in_paint_);
+
+  // You must call SetSize before using.
+  DCHECK(!graphics_.is_null() || has_pending_resize_);
+
+  EnsureCallbackPending();
+
+  aggregator_.ScrollRect(clip_rect, amount);
+}
+
+pp::Size PaintManager::GetEffectiveSize() const {
+  return has_pending_resize_ ? pending_size_ : plugin_size_;
+}
+
+float PaintManager::GetEffectiveDeviceScale() const {
+  return has_pending_resize_ ? pending_device_scale_ : device_scale_;
+}
+
+void PaintManager::EnsureCallbackPending() {
+  // The best way for us to do the next update is to get a notification that
+  // a previous one has completed. So if we're already waiting for one, we
+  // don't have to do anything differently now.
+  if (flush_pending_)
+    return;
+
+  // If no flush is pending, we need to do a manual call to get back to the
+  // main thread. We may have one already pending, or we may need to schedule.
+  if (manual_callback_pending_)
+    return;
+
+  pp::Module::Get()->core()->CallOnMainThread(
+      0,
+      callback_factory_.NewCallback(&PaintManager::OnManualCallbackComplete),
+      0);
+  manual_callback_pending_ = true;
+}
+
+void PaintManager::DoPaint() {
+  in_paint_ = true;
+
+  std::vector<ReadyRect> ready;
+  std::vector<pp::Rect> pending;
+
+  DCHECK(aggregator_.HasPendingUpdate());
+
+  // Apply any pending resize. Setting the graphics to this class must happen
+  // before asking the plugin to paint in case it requests invalides or resizes.
+  // However, the bind must not happen until afterward since we don't want to
+  // have an unpainted device bound. The needs_binding flag tells us whether to
+  // do this later.
+  if (has_pending_resize_) {
+    plugin_size_ = pending_size_;
+    // Only create a new graphics context if the current context isn't big
+    // enough or if it is far too big. This avoids creating a new context if
+    // we only resize by a small amount.
+    pp::Size new_size = GetNewContextSize(graphics_.size(), pending_size_);
+    if (graphics_.size() != new_size) {
+      graphics_ = pp::Graphics2D(instance_, new_size, is_always_opaque_);
+      graphics_need_to_be_bound_ = true;
+
+      // Since we're binding a new one, all of the callbacks have been canceled.
+      manual_callback_pending_ = false;
+      flush_pending_ = false;
+      callback_factory_.CancelAll();
+    }
+
+    if (pending_device_scale_ != 1.0)
+      graphics_.SetScale(1.0 / pending_device_scale_);
+    device_scale_ = pending_device_scale_;
+
+    // This must be cleared before calling into the plugin since it may do
+    // additional invalidation or sizing operations.
+    has_pending_resize_ = false;
+    pending_size_ = pp::Size();
+  }
+
+  PaintAggregator::PaintUpdate update = aggregator_.GetPendingUpdate();
+  client_->OnPaint(update.paint_rects, &ready, &pending);
+
+  if (ready.empty() && pending.empty()) {
+    in_paint_ = false;
+    return;  // Nothing was painted, don't schedule a flush.
+  }
+
+  std::vector<PaintAggregator::ReadyRect> ready_now;
+  if (pending.empty()) {
+    std::vector<PaintAggregator::ReadyRect> temp_ready;
+    for (size_t i = 0; i < ready.size(); ++i)
+      temp_ready.push_back(ready[i]);
+    aggregator_.SetIntermediateResults(temp_ready, pending);
+    ready_now = aggregator_.GetReadyRects();
+    aggregator_.ClearPendingUpdate();
+
+    // Apply any scroll first.
+    if (update.has_scroll)
+      graphics_.Scroll(update.scroll_rect, update.scroll_delta);
+
+    view_size_changed_waiting_for_paint_ = false;
+  } else {
+    std::vector<PaintAggregator::ReadyRect> ready_later;
+    for (size_t i = 0; i < ready.size(); ++i) {
+      // Don't flush any part (i.e. scrollbars) if we're resizing the browser,
+      // as that'll lead to flashes.  Until we flush, the browser will use the
+      // previous image, but if we flush, it'll revert to using the blank image.
+      // We make an exception for the first paint since we want to show the
+      // default background color instead of the pepper default of black.
+      if (ready[i].flush_now &&
+          (!view_size_changed_waiting_for_paint_ || first_paint_)) {
+        ready_now.push_back(ready[i]);
+      } else {
+        ready_later.push_back(ready[i]);
+      }
+    }
+    // Take the rectangles, except the ones that need to be flushed right away,
+    // and save them so that everything is flushed at once.
+    aggregator_.SetIntermediateResults(ready_later, pending);
+
+    if (ready_now.empty()) {
+      in_paint_ = false;
+      EnsureCallbackPending();
+      return;
+    }
+  }
+
+  for (size_t i = 0; i < ready_now.size(); ++i) {
+    graphics_.PaintImageData(
+        ready_now[i].image_data, ready_now[i].offset, ready_now[i].rect);
+  }
+
+  int32_t result = graphics_.Flush(
+      callback_factory_.NewCallback(&PaintManager::OnFlushComplete));
+
+  // If you trigger this assertion, then your plugin has called Flush()
+  // manually. When using the PaintManager, you should not call Flush, it will
+  // handle that for you because it needs to know when it can do the next paint
+  // by implementing the flush callback.
+  //
+  // Another possible cause of this assertion is re-using devices. If you
+  // use one device, swap it with another, then swap it back, we won't know
+  // that we've already scheduled a Flush on the first device. It's best to not
+  // re-use devices in this way.
+  DCHECK(result != PP_ERROR_INPROGRESS);
+
+  if (result == PP_OK_COMPLETIONPENDING) {
+    flush_pending_ = true;
+  } else {
+    DCHECK(result == PP_OK);  // Catch all other errors in debug mode.
+  }
+
+  in_paint_ = false;
+  first_paint_ = false;
+
+  if (graphics_need_to_be_bound_) {
+    instance_->BindGraphics(graphics_);
+    graphics_need_to_be_bound_ = false;
+  }
+}
+
+void PaintManager::OnFlushComplete(int32_t) {
+  DCHECK(flush_pending_);
+  flush_pending_ = false;
+
+  // If more paints were enqueued while we were waiting for the flush to
+  // complete, execute them now.
+  if (aggregator_.HasPendingUpdate())
+    DoPaint();
+}
+
+void PaintManager::OnManualCallbackComplete(int32_t) {
+  DCHECK(manual_callback_pending_);
+  manual_callback_pending_ = false;
+
+  // Just because we have a manual callback doesn't mean there are actually any
+  // invalid regions. Even though we only schedule this callback when something
+  // is pending, a Flush callback could have come in before this callback was
+  // executed and that could have cleared the queue.
+  if (aggregator_.HasPendingUpdate())
+    DoPaint();
+}

pdf/paint_manager.h

@@ -0,0 +1,205 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PAINT_MANAGER_H_
+#define PDF_PAINT_MANAGER_H_
+
+#include <vector>
+
+#include "pdf/paint_aggregator.h"
+#include "ppapi/cpp/graphics_2d.h"
+#include "ppapi/utility/completion_callback_factory.h"
+
+namespace pp {
+class Graphics2D;
+class Instance;
+class Point;
+class Rect;
+};
+
+// Custom PaintManager for the PDF plugin.  This is branched from the Pepper
+// version.  The difference is that this supports progressive rendering of dirty
+// rects, where multiple calls to the rendering engine are needed.  It also
+// supports having higher-priority rects flushing right away, i.e. the
+// scrollbars.
+//
+// The client's OnPaint
+class PaintManager {
+ public:
+  // Like PaintAggregator's version, but allows the plugin to tell us whether
+  // it should be flushed to the screen immediately or when the rest of the
+  // plugin viewport is ready.
+  struct ReadyRect {
+    pp::Point offset;
+    pp::Rect rect;
+    pp::ImageData image_data;
+    bool flush_now;
+
+    ReadyRect(const pp::Rect& r, const pp::ImageData& i, bool f)
+        : rect(r), image_data(i), flush_now(f) {}
+
+    operator PaintAggregator::ReadyRect() const {
+      PaintAggregator::ReadyRect rv;
+      rv.offset = offset;
+      rv.rect = rect;
+      rv.image_data = image_data;
+      return rv;
+    }
+  };
+  class Client {
+   public:
+    // Paints the given invalid area of the plugin to the given graphics
+    // device. Returns true if anything was painted.
+    //
+    // You are given the list of rects to paint in |paint_rects|.  You can
+    // combine painting into less rectangles if it's more efficient.  When a
+    // rect is painted, information about that paint should be inserted into
+    // |ready|.  Otherwise if a paint needs more work, add the rect to
+    // |pending|.  If |pending| is not empty, your OnPaint function will get
+    // called again.  Once OnPaint is called and it returns no pending rects,
+    // all the previously ready rects will be flushed on screen.  The exception
+    // is for ready rects that have |flush_now| set to true.  These will be
+    // flushed right away.
+    //
+    // Do not call Flush() on the graphics device, this will be done
+    // automatically if you return true from this function since the
+    // PaintManager needs to handle the callback.
+    //
+    // Calling Invalidate/Scroll is not allowed while inside an OnPaint
+    virtual void OnPaint(const std::vector<pp::Rect>& paint_rects,
+                         std::vector<ReadyRect>* ready,
+                         std::vector<pp::Rect>* pending) = 0;
+   protected:
+    // You shouldn't be doing deleting through this interface.
+    virtual ~Client() {}
+  };
+
+  // The instance is the plugin instance using this paint manager to do its
+  // painting. Painting will automatically go to this instance and you don't
+  // have to manually bind any device context (this is all handled by the
+  // paint manager).
+  //
+  // The Client is a non-owning pointer and must remain valid (normally the
+  // object implementing the Client interface will own the paint manager).
+  //
+  // The is_always_opaque flag will be passed to the device contexts that this
+  // class creates. Set this to true if your plugin always draws an opaque
+  // image to the device. This is used as a hint to the browser that it does
+  // not need to do alpha blending, which speeds up painting. If you generate
+  // non-opqaue pixels or aren't sure, set this to false for more general
+  // blending.
+  //
+  // If you set is_always_opaque, your alpha channel should always be set to
+  // 0xFF or there may be painting artifacts. Being opaque will allow the
+  // browser to do a memcpy rather than a blend to paint the plugin, and this
+  // means your alpha values will get set on the page backing store. If these
+  // values are incorrect, it could mess up future blending. If you aren't
+  // sure, it is always correct to specify that it it not opaque.
+  //
+  // You will need to call SetSize before this class will do anything. Normally
+  // you do this from the ViewChanged method of your plugin instance.
+  PaintManager(pp::Instance* instance, Client* client, bool is_always_opaque);
+
+  ~PaintManager();
+
+  // Returns the size of the graphics context to allocate for a given plugin
+  // size. We may allocated a slightly larger buffer than required so that we
+  // don't have to resize the context when scrollbars appear/dissapear due to
+  // zooming (which can result in flickering).
+  static pp::Size GetNewContextSize(const pp::Size& current_context_size,
+                                    const pp::Size& plugin_size);
+
+  // You must call this function before using if you use the 0-arg constructor.
+  // See the constructor for what these arguments mean.
+  void Initialize(pp::Instance* instance, Client* client,
+                  bool is_always_opaque);
+
+  // Sets the size of the plugin. If the size is the same as the previous call,
+  // this will be a NOP. If the size has changed, a new device will be
+  // allocated to the given size and a paint to that device will be scheduled.
+  //
+  // This is intended to be called from ViewChanged with the size of the
+  // plugin. Since it tracks the old size and only allocates when the size
+  // changes, you can always call this function without worrying about whether
+  // the size changed or ViewChanged is called for another reason (like the
+  // position changed).
+  void SetSize(const pp::Size& new_size, float new_device_scale);
+
+  // Invalidate the entire plugin.
+  void Invalidate();
+
+  // Invalidate the given rect.
+  void InvalidateRect(const pp::Rect& rect);
+
+  // The given rect should be scrolled by the given amounts.
+  void ScrollRect(const pp::Rect& clip_rect, const pp::Point& amount);
+
+  // Returns the size of the graphics context for the next paint operation.
+  // This is the pending size if a resize is pending (the plugin has called
+  // SetSize but we haven't actually painted it yet), or the current size of
+  // no resize is pending.
+  pp::Size GetEffectiveSize() const;
+  float GetEffectiveDeviceScale() const;
+
+ private:
+  // Disallow copy and assign (these are unimplemented).
+  PaintManager(const PaintManager&);
+  PaintManager& operator=(const PaintManager&);
+
+  // Makes sure there is a callback that will trigger a paint at a later time.
+  // This will be either a Flush callback telling us we're allowed to generate
+  // more data, or, if there's no flush callback pending, a manual call back
+  // to the message loop via ExecuteOnMainThread.
+  void EnsureCallbackPending();
+
+  // Does the client paint and executes a Flush if necessary.
+  void DoPaint();
+
+  // Callback for asynchronous completion of Flush.
+  void OnFlushComplete(int32_t);
+
+  // Callback for manual scheduling of paints when there is no flush callback
+  // pending.
+  void OnManualCallbackComplete(int32_t);
+
+  pp::Instance* instance_;
+
+  // Non-owning pointer. See the constructor.
+  Client* client_;
+
+  bool is_always_opaque_;
+
+  pp::CompletionCallbackFactory<PaintManager> callback_factory_;
+
+  // This graphics device will be is_null() if no graphics has been manually
+  // set yet.
+  pp::Graphics2D graphics_;
+
+  PaintAggregator aggregator_;
+
+  // See comment for EnsureCallbackPending for more on how these work.
+  bool manual_callback_pending_;
+  bool flush_pending_;
+
+  // When we get a resize, we don't bind right away (see SetSize). The
+  // has_pending_resize_ tells us that we need to do a resize for the next
+  // paint operation. When true, the new size is in pending_size_.
+  bool has_pending_resize_;
+  bool graphics_need_to_be_bound_;
+  pp::Size pending_size_;
+  pp::Size plugin_size_;
+  float pending_device_scale_;
+  float device_scale_;
+
+  // True iff we're in the middle of a paint.
+  bool in_paint_;
+
+  // True if we haven't painted the plugin viewport yet.
+  bool first_paint_;
+
+  // True when the view size just changed and we're waiting for a paint.
+  bool view_size_changed_waiting_for_paint_;
+};
+
+#endif  // PDF_PAINT_MANAGER_H_

pdf/pdf.cc

@@ -0,0 +1,244 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdf.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "pdf/instance.h"
+#include "pdf/out_of_process_instance.h"
+#include "ppapi/c/ppp.h"
+#include "ppapi/cpp/private/pdf.h"
+
+bool g_sdk_initialized_via_pepper = false;
+
+// The Mac release builds discard CreateModule and the entire PDFModule
+// definition because they are not referenced here. This causes the Pepper
+// exports (PPP_GetInterface etc) to not be exported. So we force the linker
+// to include this code by using __attribute__((used)).
+#if __GNUC__ >= 4
+#define PDF_USED __attribute__((used))
+#else
+#define PDF_USED
+#endif
+
+#if defined(OS_WIN)
+HMODULE g_hmodule;
+
+void HandleInvalidParameter(const wchar_t* expression,
+                            const wchar_t* function,
+                            const wchar_t* file,
+                            unsigned int line,
+                            uintptr_t reserved) {
+  // Do the same as Chrome's CHECK(false) which is undefined.
+  ::base::debug::BreakDebugger();
+  return;
+}
+
+void HandlePureVirtualCall() {
+  // Do the same as Chrome's CHECK(false) which is undefined.
+  ::base::debug::BreakDebugger();
+  return;
+}
+
+
+BOOL APIENTRY DllMain(HMODULE module, DWORD reason_for_call, LPVOID reserved) {
+  g_hmodule = module;
+  if (reason_for_call == DLL_PROCESS_ATTACH) {
+    // On windows following handlers work only inside module. So breakpad in
+    // chrome.dll does not catch that. To avoid linking related code or
+    // duplication breakpad_win.cc::InitCrashReporter() just catch errors here
+    // and crash in a way interceptable by breakpad of parent module.
+    _set_invalid_parameter_handler(HandleInvalidParameter);
+    _set_purecall_handler(HandlePureVirtualCall);
+  }
+  return TRUE;
+}
+
+#endif
+
+namespace pp {
+
+PDF_USED Module* CreateModule() {
+  return new chrome_pdf::PDFModule();
+}
+
+}  // namespace pp
+
+namespace chrome_pdf {
+
+PDFModule::PDFModule() {
+}
+
+PDFModule::~PDFModule() {
+  if (g_sdk_initialized_via_pepper) {
+    chrome_pdf::ShutdownSDK();
+    g_sdk_initialized_via_pepper = false;
+  }
+}
+
+bool PDFModule::Init() {
+  return true;
+}
+
+pp::Instance* PDFModule::CreateInstance(PP_Instance instance) {
+  if (!g_sdk_initialized_via_pepper) {
+    void* data = NULL;
+#if defined(OS_WIN)
+    data = g_hmodule;
+#endif
+    if (!chrome_pdf::InitializeSDK(data))
+      return NULL;
+    g_sdk_initialized_via_pepper = true;
+  }
+
+  if (pp::PDF::IsOutOfProcess(pp::InstanceHandle(instance)))
+    return new OutOfProcessInstance(instance);
+  return new Instance(instance);
+}
+
+}  // namespace chrome_pdf
+
+extern "C" {
+
+// TODO(sanjeevr): It might make sense to provide more stateful wrappers over
+// the internal PDF SDK (such as LoadDocument, LoadPage etc). Determine if we
+// need to provide this.
+// Wrapper exports over the PDF engine that can be used by an external module
+// such as Chrome (since Chrome cannot directly pull in PDFium sources).
+#if defined(OS_WIN)
+// |pdf_buffer| is the buffer that contains the entire PDF document to be
+//     rendered.
+// |buffer_size| is the size of pdf_buffer in bytes.
+// |page_number| is the 0-based index of the page to be rendered.
+// |dc| is the device context to render into.
+// |dpi_x| and |dpi_y| are the x and y resolutions respectively. If either value
+//     is -1, the dpi from the DC will be used.
+// |bounds_origin_x|, |bounds_origin_y|, |bounds_width| and |bounds_height|
+//     specify a bounds rectangle within the DC in which to render the PDF page.
+// |fit_to_bounds| specifies whether the output should be shrunk to fit the
+//     supplied bounds if the page size is larger than the bounds in any
+//     dimension. If this is false, parts of the PDF page that lie outside the
+//     bounds will be clipped.
+// |stretch_to_bounds| specifies whether the output should be stretched to fit
+//     the supplied bounds if the page size is smaller than the bounds in any
+//     dimension.
+// If both |fit_to_bounds| and |stretch_to_bounds| are true, then
+//     |fit_to_bounds| is honored first.
+// |keep_aspect_ratio| If any scaling is to be done is true, this flag specifies
+//     whether the original aspect ratio of the page should be preserved while
+//     scaling.
+// |center_in_bounds| specifies whether the final image (after any scaling is
+//     done) should be centered within the given bounds.
+// |autorotate| specifies whether the final image should be rotated to match
+//     the output bound.
+// Returns false if the document or the page number are not valid.
+PP_EXPORT bool RenderPDFPageToDC(const void* pdf_buffer,
+                                 int buffer_size,
+                                 int page_number,
+                                 HDC dc,
+                                 int dpi_x,
+                                 int dpi_y,
+                                 int bounds_origin_x,
+                                 int bounds_origin_y,
+                                 int bounds_width,
+                                 int bounds_height,
+                                 bool fit_to_bounds,
+                                 bool stretch_to_bounds,
+                                 bool keep_aspect_ratio,
+                                 bool center_in_bounds,
+                                 bool autorotate) {
+  if (!g_sdk_initialized_via_pepper) {
+    if (!chrome_pdf::InitializeSDK(g_hmodule)) {
+      return false;
+    }
+  }
+  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
+      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports::RenderingSettings settings(
+      dpi_x, dpi_y, pp::Rect(bounds_origin_x, bounds_origin_y, bounds_width,
+                             bounds_height),
+      fit_to_bounds, stretch_to_bounds, keep_aspect_ratio, center_in_bounds,
+      autorotate);
+  bool ret = engine_exports->RenderPDFPageToDC(pdf_buffer, buffer_size,
+                                               page_number, settings, dc);
+  if (!g_sdk_initialized_via_pepper) {
+    chrome_pdf::ShutdownSDK();
+  }
+  return ret;
+}
+
+#endif  // OS_WIN
+
+// |page_count| and |max_page_width| are optional and can be NULL.
+// Returns false if the document is not valid.
+PDF_USED PP_EXPORT
+bool GetPDFDocInfo(const void* pdf_buffer,
+                   int buffer_size, int* page_count,
+                   double* max_page_width) {
+  if (!g_sdk_initialized_via_pepper) {
+    void* data = NULL;
+#if defined(OS_WIN)
+    data = g_hmodule;
+#endif
+    if (!chrome_pdf::InitializeSDK(data))
+      return false;
+  }
+  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
+      chrome_pdf::PDFEngineExports::Create());
+  bool ret = engine_exports->GetPDFDocInfo(
+      pdf_buffer, buffer_size, page_count, max_page_width);
+  if (!g_sdk_initialized_via_pepper) {
+    chrome_pdf::ShutdownSDK();
+  }
+  return ret;
+}
+
+// Renders PDF page into 4-byte per pixel BGRA color bitmap.
+// |pdf_buffer| is the buffer that contains the entire PDF document to be
+//     rendered.
+// |pdf_buffer_size| is the size of pdf_buffer in bytes.
+// |page_number| is the 0-based index of the page to be rendered.
+// |bitmap_buffer| is the output buffer for bitmap.
+// |bitmap_width| is the width of the output bitmap.
+// |bitmap_height| is the height of the output bitmap.
+// |dpi| is the resolutions.
+// |autorotate| specifies whether the final image should be rotated to match
+//     the output bound.
+// Returns false if the document or the page number are not valid.
+PDF_USED PP_EXPORT
+bool RenderPDFPageToBitmap(const void* pdf_buffer,
+                           int pdf_buffer_size,
+                           int page_number,
+                           void* bitmap_buffer,
+                           int bitmap_width,
+                           int bitmap_height,
+                           int dpi,
+                           bool autorotate) {
+  if (!g_sdk_initialized_via_pepper) {
+    void* data = NULL;
+#if defined(OS_WIN)
+    data = g_hmodule;
+#endif
+    if (!chrome_pdf::InitializeSDK(data))
+      return false;
+  }
+  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
+      chrome_pdf::PDFEngineExports::Create());
+  chrome_pdf::PDFEngineExports::RenderingSettings settings(
+      dpi, dpi, pp::Rect(bitmap_width, bitmap_height), true, false, true, true,
+      autorotate);
+  bool ret = engine_exports->RenderPDFPageToBitmap(
+      pdf_buffer, pdf_buffer_size, page_number, settings, bitmap_buffer);
+  if (!g_sdk_initialized_via_pepper) {
+    chrome_pdf::ShutdownSDK();
+  }
+  return ret;
+}
+
+}  // extern "C"

pdf/pdf.def

@@ -0,0 +1,7 @@
+LIBRARY pdf
+
+EXPORTS
+  NP_GetEntryPoints   @1
+  NP_Initialize       @2
+  NP_Shutdown         @3
+

pdf/pdf.gyp

@@ -0,0 +1,181 @@
+{
+  'variables': {
+    'chromium_code': 1,
+    'pdf_engine%': 0,  # 0 PDFium
+  },
+  'target_defaults': {
+    'cflags': [
+      '-fPIC',
+    ],
+  },
+  'targets': [
+    {
+      'target_name': 'pdf',
+      'type': 'loadable_module',
+      'msvs_guid': '647863C0-C7A3-469A-B1ED-AD7283C34BED',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../net/net.gyp:net',
+        '../ppapi/ppapi.gyp:ppapi_cpp',
+        '../third_party/pdfium/pdfium.gyp:fpdfsdk',
+      ],
+      'xcode_settings': {
+        'INFOPLIST_FILE': 'Info.plist',
+      },
+      'mac_framework_dirs': [
+        '$(SDKROOT)/System/Library/Frameworks/ApplicationServices.framework/Frameworks',
+      ],
+      'ldflags': [ '-L<(PRODUCT_DIR)',],
+      'sources': [
+        'button.h',
+        'button.cc',
+        'chunk_stream.h',
+        'chunk_stream.cc',
+        'control.h',
+        'control.cc',
+        'document_loader.h',
+        'document_loader.cc',
+        'draw_utils.cc',
+        'draw_utils.h',
+        'fading_control.cc',
+        'fading_control.h',
+        'fading_controls.cc',
+        'fading_controls.h',
+        'instance.cc',
+        'instance.h',
+        'number_image_generator.cc',
+        'number_image_generator.h',
+        'out_of_process_instance.cc',
+        'out_of_process_instance.h',
+        'page_indicator.cc',
+        'page_indicator.h',
+        'paint_aggregator.cc',
+        'paint_aggregator.h',
+        'paint_manager.cc',
+        'paint_manager.h',
+        'pdf.cc',
+        'pdf.h',
+        'pdf.rc',
+        'progress_control.cc',
+        'progress_control.h',
+        'pdf_engine.h',
+        'preview_mode_client.cc',
+        'preview_mode_client.h',
+        'resource.h',
+        'resource_consts.h',
+        'thumbnail_control.cc',
+        'thumbnail_control.h',
+        '../chrome/browser/chrome_page_zoom_constants.cc',
+        '../content/common/page_zoom.cc',
+      ],
+      'conditions': [
+        ['pdf_engine==0', {
+          'sources': [
+            'pdfium/pdfium_assert_matching_enums.cc',
+            'pdfium/pdfium_engine.cc',
+            'pdfium/pdfium_engine.h',
+            'pdfium/pdfium_mem_buffer_file_read.cc',
+            'pdfium/pdfium_mem_buffer_file_read.h',
+            'pdfium/pdfium_mem_buffer_file_write.cc',
+            'pdfium/pdfium_mem_buffer_file_write.h',
+            'pdfium/pdfium_page.cc',
+            'pdfium/pdfium_page.h',
+            'pdfium/pdfium_range.cc',
+            'pdfium/pdfium_range.h',
+          ],
+        }],
+        ['OS!="win"', {
+          'sources!': [
+            'pdf.rc',
+          ],
+        }],
+        ['OS=="mac"', {
+          'mac_bundle': 1,
+          'product_name': 'PDF',
+          'product_extension': 'plugin',
+          # Strip the shipping binary of symbols so "Foxit" doesn't appear in
+          # the binary.  Symbols are stored in a separate .dSYM.
+          'variables': {
+            'mac_real_dsym': 1,
+          },
+          'sources+': [
+            'Info.plist'
+          ],
+        }],
+        ['OS=="win"', {
+          'defines': [
+            'COMPILE_CONTENT_STATICALLY',
+          ],
+          # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
+          'msvs_disabled_warnings': [ 4267, ],
+        }],
+        ['OS=="linux"', {
+          'configurations': {
+            'Release_Base': {
+              #'cflags': [ '-fno-weak',],  # get rid of symbols that strip doesn't remove.
+              # Don't do this for now since official builder will take care of it.  That
+              # way symbols can still be uploaded to the crash server.
+              #'ldflags': [ '-s',],  # strip local symbols from binary.
+            },
+          },
+          # Use a custom version script to prevent leaking the vendor name in
+          # visible symbols.
+          'ldflags': [
+            '-Wl,--version-script=<!(cd <(DEPTH) && pwd -P)/pdf/libpdf.map'
+          ],
+        }],
+      ],
+    },
+    {
+      'target_name': 'pdfium_test',
+      'type': 'executable',
+      'dependencies': [
+        '../base/base.gyp:base',
+        '../base/base.gyp:base_i18n',
+        '../third_party/pdfium/pdfium.gyp:fpdfsdk',
+      ],
+      'sources': [
+        'pdfium/pdfium_test.cc',
+      ],
+    }
+  ],
+  'conditions': [
+    # CrOS has a separate step to do this.
+    ['OS=="linux" and chromeos==0',
+      { 'targets': [
+        {
+          'target_name': 'pdf_linux_symbols',
+          'type': 'none',
+          'conditions': [
+            ['linux_dump_symbols==1', {
+              'actions': [
+                {
+                  'action_name': 'dump_symbols',
+                  'inputs': [
+                    '<(DEPTH)/build/linux/dump_app_syms',
+                    '<(PRODUCT_DIR)/dump_syms',
+                    '<(PRODUCT_DIR)/libpdf.so',
+                  ],
+                  'outputs': [
+                    '<(PRODUCT_DIR)/libpdf.so.breakpad.<(target_arch)',
+                  ],
+                  'action': ['<(DEPTH)/build/linux/dump_app_syms',
+                             '<(PRODUCT_DIR)/dump_syms',
+                             '<(linux_strip_binary)',
+                             '<(PRODUCT_DIR)/libpdf.so',
+                             '<@(_outputs)'],
+                  'message': 'Dumping breakpad symbols to <(_outputs)',
+                  'process_outputs_as_sources': 1,
+                },
+              ],
+              'dependencies': [
+                'pdf',
+                '../breakpad/breakpad.gyp:dump_syms',
+              ],
+            }],
+          ],
+        },
+      ],
+    },],  # OS=="linux" and chromeos==0
+  ],
+}

pdf/pdf.h

@@ -0,0 +1,24 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDF_H_
+#define PDF_PDF_H_
+
+#include "ppapi/cpp/module.h"
+
+namespace chrome_pdf {
+
+class PDFModule : public pp::Module {
+ public:
+  PDFModule();
+  virtual ~PDFModule();
+
+  // pp::Module implementation.
+  virtual bool Init();
+  virtual pp::Instance* CreateInstance(PP_Instance instance);
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDF_H_

pdf/pdf.rc

@@ -0,0 +1,104 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include "afxres.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""afxres.h""\r\n"
+    "\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION 1,0,0,1
+ PRODUCTVERSION 1,0,0,1
+ FILEFLAGSMASK 0x17L
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x4L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904e4"
+        BEGIN
+            VALUE "FileDescription", "Chrome PDF Viewer"
+            VALUE "FileVersion", "1, 0, 0, 1"
+            VALUE "InternalName", "pdf"
+            VALUE "LegalCopyright", "Copyright (C) 2010"
+            VALUE "MIMEType", "application/pdf"
+            VALUE "FileExtents", "pdf"
+            VALUE "FileOpenName", "Acrobat Portable Document Format"
+            VALUE "OriginalFilename", "pdf.dll"
+            VALUE "ProductName", "Chrome PDF Viewer"
+            VALUE "ProductVersion", "1, 0, 0, 1"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1252
+    END
+END
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED
+

pdf/pdf_engine.h

@@ -0,0 +1,319 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDF_ENGINE_H_
+#define PDF_PDF_ENGINE_H_
+
+#include "build/build_config.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string16.h"
+
+#include "ppapi/c/dev/pp_cursor_type_dev.h"
+#include "ppapi/c/dev/ppp_printing_dev.h"
+#include "ppapi/c/ppb_input_event.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/rect.h"
+#include "ppapi/cpp/size.h"
+#include "ppapi/cpp/url_loader.h"
+
+namespace pp {
+class InputEvent;
+}
+
+#define kBackgroundColorR 204
+#define kBackgroundColorG 204
+#define kBackgroundColorB 204
+#define kBackgroundColorA 255
+
+namespace chrome_pdf {
+
+class Stream;
+
+#if defined(OS_MACOSX)
+const uint32 kDefaultKeyModifier = PP_INPUTEVENT_MODIFIER_METAKEY;
+#else  // !OS_MACOSX
+const uint32 kDefaultKeyModifier = PP_INPUTEVENT_MODIFIER_CONTROLKEY;
+#endif  // OS_MACOSX
+
+// Do one time initialization of the SDK.  data is platform specific, on Windows
+// it's the instance of the DLL and it's unused on other platforms.
+bool InitializeSDK(void* data);
+// Tells the SDK that we're shutting down.
+void ShutdownSDK();
+
+// This class encapsulates a PDF rendering engine.
+class PDFEngine {
+ public:
+
+  enum DocumentPermission {
+    PERMISSION_COPY,
+    PERMISSION_COPY_ACCESSIBLE,
+    PERMISSION_PRINT_LOW_QUALITY,
+    PERMISSION_PRINT_HIGH_QUALITY,
+  };
+
+  // The interface that's provided to the rendering engine.
+  class Client {
+   public:
+    // Informs the client about the document's size in pixels.
+    virtual void DocumentSizeUpdated(const pp::Size& size) = 0;
+
+    // Informs the client that the given rect needs to be repainted.
+    virtual void Invalidate(const pp::Rect& rect) = 0;
+
+    // Informs the client to scroll the plugin area by the given offset.
+    virtual void Scroll(const pp::Point& point) = 0;
+
+    // Scroll the horizontal/vertical scrollbars to a given position.
+    virtual void ScrollToX(int position) = 0;
+    virtual void ScrollToY(int position) = 0;
+
+    // Scroll to the specified page.
+    virtual void ScrollToPage(int page) = 0;
+
+    // Navigate to the given url.
+    virtual void NavigateTo(const std::string& url, bool open_in_new_tab) = 0;
+
+    // Updates the cursor.
+    virtual void UpdateCursor(PP_CursorType_Dev cursor) = 0;
+
+    // Updates the tick marks in the vertical scrollbar.
+    virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks) = 0;
+
+    // Updates the number of find results for the current search term.  If
+    // there are no matches 0 should be passed in.  Only when the plugin has
+    // finished searching should it pass in the final count with final_result
+    // set to true.
+    virtual void NotifyNumberOfFindResultsChanged(int total,
+                                                  bool final_result) = 0;
+
+    // Updates the index of the currently selected search item.
+    virtual void NotifySelectedFindResultChanged(int current_find_index) = 0;
+
+    // Prompts the user for a password to open this document. The callback is
+    // called when the password is retrieved.
+    virtual void GetDocumentPassword(
+        pp::CompletionCallbackWithOutput<pp::Var> callback) = 0;
+
+    // Puts up an alert with the given message.
+    virtual void Alert(const std::string& message) = 0;
+
+    // Puts up a confirm with the given message, and returns true if the user
+    // presses OK, or false if they press cancel.
+    virtual bool Confirm(const std::string& message) = 0;
+
+    // Puts up a prompt with the given message and default answer and returns
+    // the answer.
+    virtual std::string Prompt(const std::string& question,
+                               const std::string& default_answer) = 0;
+
+    // Returns the url of the pdf.
+    virtual std::string GetURL() = 0;
+
+    // Send an email.
+    virtual void Email(const std::string& to,
+                       const std::string& cc,
+                       const std::string& bcc,
+                       const std::string& subject,
+                       const std::string& body) = 0;
+
+    // Put up the print dialog.
+    virtual void Print() = 0;
+
+    // Submit the data using HTTP POST.
+    virtual void SubmitForm(const std::string& url,
+                            const void* data,
+                            int length) = 0;
+
+    // Pops up a file selection dialog and returns the result.
+    virtual std::string ShowFileSelectionDialog() = 0;
+
+    // Creates and returns new URL loader for partial document requests.
+    virtual pp::URLLoader CreateURLLoader() = 0;
+
+    // Calls the client's OnCallback() function in delay_in_ms with the given
+    // id.
+    virtual void ScheduleCallback(int id, int delay_in_ms) = 0;
+
+    // Searches the given string for "term" and returns the results.  Unicode-
+    // aware.
+    struct SearchStringResult {
+      int start_index;
+      int length;
+    };
+    virtual void SearchString(const base::char16* string,
+                              const base::char16* term,
+                              bool case_sensitive,
+                              std::vector<SearchStringResult>* results) = 0;
+
+    // Notifies the client that the engine has painted a page from the document.
+    virtual void DocumentPaintOccurred() = 0;
+
+    // Notifies the client that the document has finished loading.
+    virtual void DocumentLoadComplete(int page_count) = 0;
+
+    // Notifies the client that the document has failed to load.
+    virtual void DocumentLoadFailed() = 0;
+
+    virtual pp::Instance* GetPluginInstance() = 0;
+
+    // Notifies that an unsupported feature in the PDF was encountered.
+    virtual void DocumentHasUnsupportedFeature(const std::string& feature) = 0;
+
+    // Notifies the client about document load progress.
+    virtual void DocumentLoadProgress(uint32 available, uint32 doc_size) = 0;
+
+    // Notifies the client about focus changes for form text fields.
+    virtual void FormTextFieldFocusChange(bool in_focus) = 0;
+
+    // Returns true if the plugin has been opened within print preview.
+    virtual bool IsPrintPreview() = 0;
+  };
+
+  // Factory method to create an instance of the PDF Engine.
+  static PDFEngine* Create(Client* client);
+
+  virtual ~PDFEngine() {}
+  // Most of these functions are similar to the Pepper functions of the same
+  // name, so not repeating the description here unless it's different.
+  virtual bool New(const char* url) = 0;
+  virtual bool New(const char* url,
+                   const char* headers) = 0;
+  virtual void PageOffsetUpdated(const pp::Point& page_offset) = 0;
+  virtual void PluginSizeUpdated(const pp::Size& size) = 0;
+  virtual void ScrolledToXPosition(int position) = 0;
+  virtual void ScrolledToYPosition(int position) = 0;
+  // Paint is called a series of times. Before these n calls are made, PrePaint
+  // is called once. After Paint is called n times, PostPaint is called once.
+  virtual void PrePaint() = 0;
+  virtual void Paint(const pp::Rect& rect,
+                     pp::ImageData* image_data,
+                     std::vector<pp::Rect>* ready,
+                     std::vector<pp::Rect>* pending) = 0;
+  virtual void PostPaint() = 0;
+  virtual bool HandleDocumentLoad(const pp::URLLoader& loader) = 0;
+  virtual bool HandleEvent(const pp::InputEvent& event) = 0;
+  virtual uint32_t QuerySupportedPrintOutputFormats() = 0;
+  virtual void PrintBegin() = 0;
+  virtual pp::Resource PrintPages(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count,
+      const PP_PrintSettings_Dev& print_settings) = 0;
+  virtual void PrintEnd() = 0;
+  virtual void StartFind(const char* text, bool case_sensitive) = 0;
+  virtual bool SelectFindResult(bool forward) = 0;
+  virtual void StopFind() = 0;
+  virtual void ZoomUpdated(double new_zoom_level) = 0;
+  virtual void RotateClockwise() = 0;
+  virtual void RotateCounterclockwise() = 0;
+  virtual std::string GetSelectedText() = 0;
+  virtual std::string GetLinkAtPosition(const pp::Point& point) = 0;
+  virtual bool IsSelecting() = 0;
+  // Checks the permissions associated with this document.
+  virtual bool HasPermission(DocumentPermission permission) const = 0;
+  virtual void SelectAll() = 0;
+  // Gets the number of pages in the document.
+  virtual int GetNumberOfPages() = 0;
+  // Gets the 0-based page number of |destination|, or -1 if it does not exist.
+  virtual int GetNamedDestinationPage(const std::string& destination) = 0;
+  // Gets the index of the first visible page, or -1 if none are visible.
+  virtual int GetFirstVisiblePage() = 0;
+  // Gets the index of the most visible page, or -1 if none are visible.
+  virtual int GetMostVisiblePage() = 0;
+  // Gets the rectangle of the page including shadow.
+  virtual pp::Rect GetPageRect(int index) = 0;
+  // Gets the rectangle of the page excluding any additional areas.
+  virtual pp::Rect GetPageContentsRect(int index) = 0;
+  // Gets the offset of the vertical scrollbar from the top in document
+  // coordinates.
+  virtual int GetVerticalScrollbarYPosition() = 0;
+  // Paints page thumbnail to the ImageData.
+  virtual void PaintThumbnail(pp::ImageData* image_data, int index) = 0;
+  // Set color / grayscale rendering modes.
+  virtual void SetGrayscale(bool grayscale) = 0;
+  // Callback for timer that's set with ScheduleCallback().
+  virtual void OnCallback(int id) = 0;
+  // Gets the JSON representation of the PDF file
+  virtual std::string GetPageAsJSON(int index) = 0;
+  // Gets the PDF document's print scaling preference. True if the document can
+  // be scaled to fit.
+  virtual bool GetPrintScaling() = 0;
+
+  // Append blank pages to make a 1-page document to a |num_pages| document.
+  // Always retain the first page data.
+  virtual void AppendBlankPages(int num_pages) = 0;
+  // Append the first page of the document loaded with the |engine| to this
+  // document at page |index|.
+  virtual void AppendPage(PDFEngine* engine, int index) = 0;
+
+  // Allow client to query and reset scroll positions in document coordinates.
+  // Note that this is meant for cases where the device scale factor changes,
+  // and not for general scrolling - the engine will not repaint due to this.
+  virtual pp::Point GetScrollPosition() = 0;
+  virtual void SetScrollPosition(const pp::Point& position) = 0;
+
+  virtual bool IsProgressiveLoad() = 0;
+};
+
+// Interface for exports that wrap the PDF engine.
+class PDFEngineExports {
+ public:
+  struct RenderingSettings {
+   RenderingSettings(int dpi_x,
+                     int dpi_y,
+                     const pp::Rect& bounds,
+                     bool fit_to_bounds,
+                     bool stretch_to_bounds,
+                     bool keep_aspect_ratio,
+                     bool center_in_bounds,
+                     bool autorotate)
+      : dpi_x(dpi_x), dpi_y(dpi_y), bounds(bounds),
+        fit_to_bounds(fit_to_bounds), stretch_to_bounds(stretch_to_bounds),
+        keep_aspect_ratio(keep_aspect_ratio),
+        center_in_bounds(center_in_bounds), autorotate(autorotate) {
+    }
+    int dpi_x;
+    int dpi_y;
+    pp::Rect bounds;
+    bool fit_to_bounds;
+    bool stretch_to_bounds;
+    bool keep_aspect_ratio;
+    bool center_in_bounds;
+    bool autorotate;
+  };
+
+  PDFEngineExports() {}
+  virtual ~PDFEngineExports() {}
+  static PDFEngineExports* Create();
+#if defined(OS_WIN)
+  // See the definition of RenderPDFPageToDC in pdf.cc for details.
+  virtual bool RenderPDFPageToDC(const void* pdf_buffer,
+                                 int buffer_size,
+                                 int page_number,
+                                 const RenderingSettings& settings,
+                                 HDC dc) = 0;
+#endif  // OS_WIN
+  // See the definition of RenderPDFPageToBitmap in pdf.cc for details.
+  virtual bool RenderPDFPageToBitmap(const void* pdf_buffer,
+                                     int pdf_buffer_size,
+                                     int page_number,
+                                     const RenderingSettings& settings,
+                                     void* bitmap_buffer) = 0;
+  virtual bool GetPDFDocInfo(const void* pdf_buffer,
+                             int buffer_size,
+                             int* page_count,
+                             double* max_page_width) = 0;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDF_ENGINE_H_

pdf/pdfium/pdfium_assert_matching_enums.cc

@@ -0,0 +1,207 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/basictypes.h"
+#include "ppapi/c/pp_input_event.h"
+#include "ppapi/c/private/ppb_pdf.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_fwlevent.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_sysfontinfo.h"
+#include "ui/events/keycodes/keyboard_codes.h"
+
+#define COMPILE_ASSERT_MATCH(np_name, pdfium_name) \
+    COMPILE_ASSERT(int(np_name) == int(pdfium_name), mismatching_enums)
+
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_SHIFTKEY, FWL_EVENTFLAG_ShiftKey);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_CONTROLKEY,
+                     FWL_EVENTFLAG_ControlKey);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_ALTKEY, FWL_EVENTFLAG_AltKey);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_METAKEY, FWL_EVENTFLAG_MetaKey);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_ISKEYPAD, FWL_EVENTFLAG_KeyPad);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_ISAUTOREPEAT,
+                     FWL_EVENTFLAG_AutoRepeat);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN,
+                     FWL_EVENTFLAG_LeftButtonDown);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN,
+                     FWL_EVENTFLAG_MiddleButtonDown);
+COMPILE_ASSERT_MATCH(PP_INPUTEVENT_MODIFIER_RIGHTBUTTONDOWN,
+                     FWL_EVENTFLAG_RightButtonDown);
+
+COMPILE_ASSERT_MATCH(ui::VKEY_BACK, FWL_VKEY_Back);
+COMPILE_ASSERT_MATCH(ui::VKEY_TAB, FWL_VKEY_Tab);
+COMPILE_ASSERT_MATCH(ui::VKEY_CLEAR, FWL_VKEY_Clear);
+COMPILE_ASSERT_MATCH(ui::VKEY_RETURN, FWL_VKEY_Return);
+COMPILE_ASSERT_MATCH(ui::VKEY_SHIFT, FWL_VKEY_Shift);
+COMPILE_ASSERT_MATCH(ui::VKEY_CONTROL, FWL_VKEY_Control);
+COMPILE_ASSERT_MATCH(ui::VKEY_MENU, FWL_VKEY_Menu);
+COMPILE_ASSERT_MATCH(ui::VKEY_PAUSE, FWL_VKEY_Pause);
+COMPILE_ASSERT_MATCH(ui::VKEY_CAPITAL, FWL_VKEY_Capital);
+COMPILE_ASSERT_MATCH(ui::VKEY_KANA, FWL_VKEY_Kana);
+COMPILE_ASSERT_MATCH(ui::VKEY_HANGUL, FWL_VKEY_Hangul);
+COMPILE_ASSERT_MATCH(ui::VKEY_JUNJA, FWL_VKEY_Junja);
+COMPILE_ASSERT_MATCH(ui::VKEY_FINAL, FWL_VKEY_Final);
+COMPILE_ASSERT_MATCH(ui::VKEY_HANJA, FWL_VKEY_Hanja);
+COMPILE_ASSERT_MATCH(ui::VKEY_KANJI, FWL_VKEY_Kanji);
+COMPILE_ASSERT_MATCH(ui::VKEY_ESCAPE, FWL_VKEY_Escape);
+COMPILE_ASSERT_MATCH(ui::VKEY_CONVERT, FWL_VKEY_Convert);
+COMPILE_ASSERT_MATCH(ui::VKEY_NONCONVERT, FWL_VKEY_NonConvert);
+COMPILE_ASSERT_MATCH(ui::VKEY_ACCEPT, FWL_VKEY_Accept);
+COMPILE_ASSERT_MATCH(ui::VKEY_MODECHANGE, FWL_VKEY_ModeChange);
+COMPILE_ASSERT_MATCH(ui::VKEY_SPACE, FWL_VKEY_Space);
+COMPILE_ASSERT_MATCH(ui::VKEY_PRIOR, FWL_VKEY_Prior);
+COMPILE_ASSERT_MATCH(ui::VKEY_NEXT, FWL_VKEY_Next);
+COMPILE_ASSERT_MATCH(ui::VKEY_END, FWL_VKEY_End);
+COMPILE_ASSERT_MATCH(ui::VKEY_HOME, FWL_VKEY_Home);
+COMPILE_ASSERT_MATCH(ui::VKEY_LEFT, FWL_VKEY_Left);
+COMPILE_ASSERT_MATCH(ui::VKEY_UP, FWL_VKEY_Up);
+COMPILE_ASSERT_MATCH(ui::VKEY_RIGHT, FWL_VKEY_Right);
+COMPILE_ASSERT_MATCH(ui::VKEY_DOWN, FWL_VKEY_Down);
+COMPILE_ASSERT_MATCH(ui::VKEY_SELECT, FWL_VKEY_Select);
+COMPILE_ASSERT_MATCH(ui::VKEY_PRINT, FWL_VKEY_Print);
+COMPILE_ASSERT_MATCH(ui::VKEY_EXECUTE, FWL_VKEY_Execute);
+COMPILE_ASSERT_MATCH(ui::VKEY_SNAPSHOT, FWL_VKEY_Snapshot);
+COMPILE_ASSERT_MATCH(ui::VKEY_INSERT, FWL_VKEY_Insert);
+COMPILE_ASSERT_MATCH(ui::VKEY_DELETE, FWL_VKEY_Delete);
+COMPILE_ASSERT_MATCH(ui::VKEY_HELP, FWL_VKEY_Help);
+COMPILE_ASSERT_MATCH(ui::VKEY_0, FWL_VKEY_0);
+COMPILE_ASSERT_MATCH(ui::VKEY_1, FWL_VKEY_1);
+COMPILE_ASSERT_MATCH(ui::VKEY_2, FWL_VKEY_2);
+COMPILE_ASSERT_MATCH(ui::VKEY_3, FWL_VKEY_3);
+COMPILE_ASSERT_MATCH(ui::VKEY_4, FWL_VKEY_4);
+COMPILE_ASSERT_MATCH(ui::VKEY_5, FWL_VKEY_5);
+COMPILE_ASSERT_MATCH(ui::VKEY_6, FWL_VKEY_6);
+COMPILE_ASSERT_MATCH(ui::VKEY_7, FWL_VKEY_7);
+COMPILE_ASSERT_MATCH(ui::VKEY_8, FWL_VKEY_8);
+COMPILE_ASSERT_MATCH(ui::VKEY_9, FWL_VKEY_9);
+COMPILE_ASSERT_MATCH(ui::VKEY_A, FWL_VKEY_A);
+COMPILE_ASSERT_MATCH(ui::VKEY_B, FWL_VKEY_B);
+COMPILE_ASSERT_MATCH(ui::VKEY_C, FWL_VKEY_C);
+COMPILE_ASSERT_MATCH(ui::VKEY_D, FWL_VKEY_D);
+COMPILE_ASSERT_MATCH(ui::VKEY_E, FWL_VKEY_E);
+COMPILE_ASSERT_MATCH(ui::VKEY_F, FWL_VKEY_F);
+COMPILE_ASSERT_MATCH(ui::VKEY_G, FWL_VKEY_G);
+COMPILE_ASSERT_MATCH(ui::VKEY_H, FWL_VKEY_H);
+COMPILE_ASSERT_MATCH(ui::VKEY_I, FWL_VKEY_I);
+COMPILE_ASSERT_MATCH(ui::VKEY_J, FWL_VKEY_J);
+COMPILE_ASSERT_MATCH(ui::VKEY_K, FWL_VKEY_K);
+COMPILE_ASSERT_MATCH(ui::VKEY_L, FWL_VKEY_L);
+COMPILE_ASSERT_MATCH(ui::VKEY_M, FWL_VKEY_M);
+COMPILE_ASSERT_MATCH(ui::VKEY_N, FWL_VKEY_N);
+COMPILE_ASSERT_MATCH(ui::VKEY_O, FWL_VKEY_O);
+COMPILE_ASSERT_MATCH(ui::VKEY_P, FWL_VKEY_P);
+COMPILE_ASSERT_MATCH(ui::VKEY_Q, FWL_VKEY_Q);
+COMPILE_ASSERT_MATCH(ui::VKEY_R, FWL_VKEY_R);
+COMPILE_ASSERT_MATCH(ui::VKEY_S, FWL_VKEY_S);
+COMPILE_ASSERT_MATCH(ui::VKEY_T, FWL_VKEY_T);
+COMPILE_ASSERT_MATCH(ui::VKEY_U, FWL_VKEY_U);
+COMPILE_ASSERT_MATCH(ui::VKEY_V, FWL_VKEY_V);
+COMPILE_ASSERT_MATCH(ui::VKEY_W, FWL_VKEY_W);
+COMPILE_ASSERT_MATCH(ui::VKEY_X, FWL_VKEY_X);
+COMPILE_ASSERT_MATCH(ui::VKEY_Y, FWL_VKEY_Y);
+COMPILE_ASSERT_MATCH(ui::VKEY_Z, FWL_VKEY_Z);
+COMPILE_ASSERT_MATCH(ui::VKEY_LWIN, FWL_VKEY_LWin);
+COMPILE_ASSERT_MATCH(ui::VKEY_COMMAND, FWL_VKEY_Command);
+COMPILE_ASSERT_MATCH(ui::VKEY_RWIN, FWL_VKEY_RWin);
+COMPILE_ASSERT_MATCH(ui::VKEY_APPS, FWL_VKEY_Apps);
+COMPILE_ASSERT_MATCH(ui::VKEY_SLEEP, FWL_VKEY_Sleep);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD0, FWL_VKEY_NumPad0);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD1, FWL_VKEY_NumPad1);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD2, FWL_VKEY_NumPad2);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD3, FWL_VKEY_NumPad3);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD4, FWL_VKEY_NumPad4);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD5, FWL_VKEY_NumPad5);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD6, FWL_VKEY_NumPad6);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD7, FWL_VKEY_NumPad7);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD8, FWL_VKEY_NumPad8);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMPAD9, FWL_VKEY_NumPad9);
+COMPILE_ASSERT_MATCH(ui::VKEY_MULTIPLY, FWL_VKEY_Multiply);
+COMPILE_ASSERT_MATCH(ui::VKEY_ADD, FWL_VKEY_Add);
+COMPILE_ASSERT_MATCH(ui::VKEY_SEPARATOR, FWL_VKEY_Separator);
+COMPILE_ASSERT_MATCH(ui::VKEY_SUBTRACT, FWL_VKEY_Subtract);
+COMPILE_ASSERT_MATCH(ui::VKEY_DECIMAL, FWL_VKEY_Decimal);
+COMPILE_ASSERT_MATCH(ui::VKEY_DIVIDE, FWL_VKEY_Divide);
+COMPILE_ASSERT_MATCH(ui::VKEY_F1, FWL_VKEY_F1);
+COMPILE_ASSERT_MATCH(ui::VKEY_F2, FWL_VKEY_F2);
+COMPILE_ASSERT_MATCH(ui::VKEY_F3, FWL_VKEY_F3);
+COMPILE_ASSERT_MATCH(ui::VKEY_F4, FWL_VKEY_F4);
+COMPILE_ASSERT_MATCH(ui::VKEY_F5, FWL_VKEY_F5);
+COMPILE_ASSERT_MATCH(ui::VKEY_F6, FWL_VKEY_F6);
+COMPILE_ASSERT_MATCH(ui::VKEY_F7, FWL_VKEY_F7);
+COMPILE_ASSERT_MATCH(ui::VKEY_F8, FWL_VKEY_F8);
+COMPILE_ASSERT_MATCH(ui::VKEY_F9, FWL_VKEY_F9);
+COMPILE_ASSERT_MATCH(ui::VKEY_F10, FWL_VKEY_F10);
+COMPILE_ASSERT_MATCH(ui::VKEY_F11, FWL_VKEY_F11);
+COMPILE_ASSERT_MATCH(ui::VKEY_F12, FWL_VKEY_F12);
+COMPILE_ASSERT_MATCH(ui::VKEY_F13, FWL_VKEY_F13);
+COMPILE_ASSERT_MATCH(ui::VKEY_F14, FWL_VKEY_F14);
+COMPILE_ASSERT_MATCH(ui::VKEY_F15, FWL_VKEY_F15);
+COMPILE_ASSERT_MATCH(ui::VKEY_F16, FWL_VKEY_F16);
+COMPILE_ASSERT_MATCH(ui::VKEY_F17, FWL_VKEY_F17);
+COMPILE_ASSERT_MATCH(ui::VKEY_F18, FWL_VKEY_F18);
+COMPILE_ASSERT_MATCH(ui::VKEY_F19, FWL_VKEY_F19);
+COMPILE_ASSERT_MATCH(ui::VKEY_F20, FWL_VKEY_F20);
+COMPILE_ASSERT_MATCH(ui::VKEY_F21, FWL_VKEY_F21);
+COMPILE_ASSERT_MATCH(ui::VKEY_F22, FWL_VKEY_F22);
+COMPILE_ASSERT_MATCH(ui::VKEY_F23, FWL_VKEY_F23);
+COMPILE_ASSERT_MATCH(ui::VKEY_F24, FWL_VKEY_F24);
+COMPILE_ASSERT_MATCH(ui::VKEY_NUMLOCK, FWL_VKEY_NunLock);
+COMPILE_ASSERT_MATCH(ui::VKEY_SCROLL, FWL_VKEY_Scroll);
+COMPILE_ASSERT_MATCH(ui::VKEY_LSHIFT, FWL_VKEY_LShift);
+COMPILE_ASSERT_MATCH(ui::VKEY_RSHIFT, FWL_VKEY_RShift);
+COMPILE_ASSERT_MATCH(ui::VKEY_LCONTROL, FWL_VKEY_LControl);
+COMPILE_ASSERT_MATCH(ui::VKEY_RCONTROL, FWL_VKEY_RControl);
+COMPILE_ASSERT_MATCH(ui::VKEY_LMENU, FWL_VKEY_LMenu);
+COMPILE_ASSERT_MATCH(ui::VKEY_RMENU, FWL_VKEY_RMenu);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_BACK, FWL_VKEY_BROWSER_Back);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_FORWARD, FWL_VKEY_BROWSER_Forward);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_REFRESH, FWL_VKEY_BROWSER_Refresh);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_STOP, FWL_VKEY_BROWSER_Stop);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_SEARCH, FWL_VKEY_BROWSER_Search);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_FAVORITES, FWL_VKEY_BROWSER_Favorites);
+COMPILE_ASSERT_MATCH(ui::VKEY_BROWSER_HOME, FWL_VKEY_BROWSER_Home);
+COMPILE_ASSERT_MATCH(ui::VKEY_VOLUME_MUTE, FWL_VKEY_VOLUME_Mute);
+COMPILE_ASSERT_MATCH(ui::VKEY_VOLUME_DOWN, FWL_VKEY_VOLUME_Down);
+COMPILE_ASSERT_MATCH(ui::VKEY_VOLUME_UP, FWL_VKEY_VOLUME_Up);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_NEXT_TRACK, FWL_VKEY_MEDIA_NEXT_Track);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_PREV_TRACK, FWL_VKEY_MEDIA_PREV_Track);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_STOP, FWL_VKEY_MEDIA_Stop);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_PLAY_PAUSE, FWL_VKEY_MEDIA_PLAY_Pause);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_LAUNCH_MAIL, FWL_VKEY_MEDIA_LAUNCH_Mail);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_LAUNCH_MEDIA_SELECT,
+                     FWL_VKEY_MEDIA_LAUNCH_MEDIA_Select);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_LAUNCH_APP1, FWL_VKEY_MEDIA_LAUNCH_APP1);
+COMPILE_ASSERT_MATCH(ui::VKEY_MEDIA_LAUNCH_APP2, FWL_VKEY_MEDIA_LAUNCH_APP2);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_1, FWL_VKEY_OEM_1);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_PLUS, FWL_VKEY_OEM_Plus);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_COMMA, FWL_VKEY_OEM_Comma);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_MINUS, FWL_VKEY_OEM_Minus);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_PERIOD, FWL_VKEY_OEM_Period);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_2, FWL_VKEY_OEM_2);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_3, FWL_VKEY_OEM_3);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_4, FWL_VKEY_OEM_4);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_5, FWL_VKEY_OEM_5);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_6, FWL_VKEY_OEM_6);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_7, FWL_VKEY_OEM_7);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_8, FWL_VKEY_OEM_8);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_102, FWL_VKEY_OEM_102);
+COMPILE_ASSERT_MATCH(ui::VKEY_PROCESSKEY, FWL_VKEY_ProcessKey);
+COMPILE_ASSERT_MATCH(ui::VKEY_PACKET, FWL_VKEY_Packet);
+COMPILE_ASSERT_MATCH(ui::VKEY_ATTN, FWL_VKEY_Attn);
+COMPILE_ASSERT_MATCH(ui::VKEY_CRSEL, FWL_VKEY_Crsel);
+COMPILE_ASSERT_MATCH(ui::VKEY_EXSEL, FWL_VKEY_Exsel);
+COMPILE_ASSERT_MATCH(ui::VKEY_EREOF, FWL_VKEY_Ereof);
+COMPILE_ASSERT_MATCH(ui::VKEY_PLAY, FWL_VKEY_Play);
+COMPILE_ASSERT_MATCH(ui::VKEY_ZOOM, FWL_VKEY_Zoom);
+COMPILE_ASSERT_MATCH(ui::VKEY_NONAME, FWL_VKEY_NoName);
+COMPILE_ASSERT_MATCH(ui::VKEY_PA1, FWL_VKEY_PA1);
+COMPILE_ASSERT_MATCH(ui::VKEY_OEM_CLEAR, FWL_VKEY_OEM_Clear);
+COMPILE_ASSERT_MATCH(ui::VKEY_UNKNOWN, FWL_VKEY_Unknown);
+
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_ANSI, FXFONT_ANSI_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_DEFAULT, FXFONT_DEFAULT_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_SYMBOL, FXFONT_SYMBOL_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_SHIFTJIS, FXFONT_SHIFTJIS_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_HANGUL, FXFONT_HANGEUL_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_GB2312, FXFONT_GB2312_CHARSET);
+COMPILE_ASSERT_MATCH(PP_PRIVATEFONTCHARSET_CHINESEBIG5,
+                     FXFONT_CHINESEBIG5_CHARSET);

pdf/pdfium/pdfium_engine.h

@@ -0,0 +1,621 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDFIUM_PDFIUM_ENGINE_H_
+#define PDF_PDFIUM_PDFIUM_ENGINE_H_
+
+#include <map>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/time/time.h"
+#include "pdf/document_loader.h"
+#include "pdf/pdf_engine.h"
+#include "pdf/pdfium/pdfium_page.h"
+#include "pdf/pdfium/pdfium_range.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/dev/buffer_dev.h"
+#include "ppapi/cpp/image_data.h"
+#include "ppapi/cpp/point.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_dataavail.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_progressive.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfformfill.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfview.h"
+
+namespace pp {
+class KeyboardInputEvent;
+class MouseInputEvent;
+}
+
+namespace chrome_pdf {
+
+class ShadowMatrix;
+
+class PDFiumEngine : public PDFEngine,
+                     public DocumentLoader::Client,
+                     public FPDF_FORMFILLINFO,
+                     public IPDF_JSPLATFORM,
+                     public IFSDK_PAUSE {
+ public:
+  explicit PDFiumEngine(PDFEngine::Client* client);
+  virtual ~PDFiumEngine();
+
+  // PDFEngine implementation.
+  virtual bool New(const char* url);
+  virtual bool New(const char* url,
+                   const char* headers);
+  virtual void PageOffsetUpdated(const pp::Point& page_offset);
+  virtual void PluginSizeUpdated(const pp::Size& size);
+  virtual void ScrolledToXPosition(int position);
+  virtual void ScrolledToYPosition(int position);
+  virtual void PrePaint();
+  virtual void Paint(const pp::Rect& rect,
+                     pp::ImageData* image_data,
+                     std::vector<pp::Rect>* ready,
+                     std::vector<pp::Rect>* pending);
+  virtual void PostPaint();
+  virtual bool HandleDocumentLoad(const pp::URLLoader& loader);
+  virtual bool HandleEvent(const pp::InputEvent& event);
+  virtual uint32_t QuerySupportedPrintOutputFormats();
+  virtual void PrintBegin();
+  virtual pp::Resource PrintPages(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count,
+      const PP_PrintSettings_Dev& print_settings);
+  virtual void PrintEnd();
+  virtual void StartFind(const char* text, bool case_sensitive);
+  virtual bool SelectFindResult(bool forward);
+  virtual void StopFind();
+  virtual void ZoomUpdated(double new_zoom_level);
+  virtual void RotateClockwise();
+  virtual void RotateCounterclockwise();
+  virtual std::string GetSelectedText();
+  virtual std::string GetLinkAtPosition(const pp::Point& point);
+  virtual bool IsSelecting();
+  virtual bool HasPermission(DocumentPermission permission) const;
+  virtual void SelectAll();
+  virtual int GetNumberOfPages();
+  virtual int GetNamedDestinationPage(const std::string& destination);
+  virtual int GetFirstVisiblePage();
+  virtual int GetMostVisiblePage();
+  virtual pp::Rect GetPageRect(int index);
+  virtual pp::Rect GetPageContentsRect(int index);
+  virtual int GetVerticalScrollbarYPosition() { return position_.y(); }
+  virtual void PaintThumbnail(pp::ImageData* image_data, int index);
+  virtual void SetGrayscale(bool grayscale);
+  virtual void OnCallback(int id);
+  virtual std::string GetPageAsJSON(int index);
+  virtual bool GetPrintScaling();
+  virtual void AppendBlankPages(int num_pages);
+  virtual void AppendPage(PDFEngine* engine, int index);
+  virtual pp::Point GetScrollPosition();
+  virtual void SetScrollPosition(const pp::Point& position);
+  virtual bool IsProgressiveLoad();
+
+  // DocumentLoader::Client implementation.
+  virtual pp::Instance* GetPluginInstance();
+  virtual pp::URLLoader CreateURLLoader();
+  virtual void OnPartialDocumentLoaded();
+  virtual void OnPendingRequestComplete();
+  virtual void OnNewDataAvailable();
+  virtual void OnDocumentComplete();
+
+  void UnsupportedFeature(int type);
+
+  std::string current_find_text() const { return current_find_text_; }
+
+  FPDF_DOCUMENT doc() { return doc_; }
+  FPDF_FORMHANDLE form() { return form_; }
+
+ private:
+  // This helper class is used to detect the difference in selection between
+  // construction and destruction.  At destruction, it invalidates all the
+  // parts that are newly selected, along with all the parts that used to be
+  // selected but are not anymore.
+  class SelectionChangeInvalidator {
+   public:
+    explicit SelectionChangeInvalidator(PDFiumEngine* engine);
+    ~SelectionChangeInvalidator();
+   private:
+    // Sets the given container to the all the currently visible selection
+    // rectangles, in screen coordinates.
+    void GetVisibleSelectionsScreenRects(std::vector<pp::Rect>* rects);
+
+    PDFiumEngine* engine_;
+    // Screen rectangles that were selected on construction.
+    std::vector<pp::Rect> old_selections_;
+    // The origin at the time this object was constructed.
+    pp::Point previous_origin_;
+  };
+
+  friend class SelectionChangeInvalidator;
+
+  struct FileAvail : public FX_FILEAVAIL {
+    DocumentLoader* loader;
+  };
+
+  struct DownloadHints : public FX_DOWNLOADHINTS {
+    DocumentLoader* loader;
+  };
+
+  // PDFium interface to get block of data.
+  static int GetBlock(void* param, unsigned long position,
+                      unsigned char* buffer, unsigned long size);
+
+  // PDFium interface to check is block of data is available.
+  static bool IsDataAvail(FX_FILEAVAIL* param,
+                          size_t offset, size_t size);
+
+  // PDFium interface to request download of the block of data.
+  static void AddSegment(FX_DOWNLOADHINTS* param,
+                         size_t offset, size_t size);
+
+  // We finished getting the pdf file, so load it. This will complete
+  // asynchronously (due to password fetching) and may be run multiple times.
+  void LoadDocument();
+
+  // Try loading the document. Returns true if the document is successfully
+  // loaded or is already loaded otherwise it will return false. If
+  // |with_password| is set to true, the document will be loaded with
+  // |password|. If the document could not be loaded and needs a password,
+  // |needs_password| will be set to true.
+  bool TryLoadingDoc(bool with_password,
+                     const std::string& password,
+                     bool* needs_password);
+
+  // Ask the user for the document password and then continue loading the
+  // document.
+  void GetPasswordAndLoad();
+
+  // Called when the password has been retrieved.
+  void OnGetPasswordComplete(int32_t result,
+                             const pp::Var& password);
+
+  // Continues loading the document when the password has been retrieved, or if
+  // there is no password.
+  void ContinueLoadingDocument(bool has_password,
+                               const std::string& password);
+
+  // Finish loading the document and notify the client that the document has
+  // been loaded. This should only be run after |doc_| has been loaded and the
+  // document is fully downloaded. If this has been run once, it will result in
+  // a no-op.
+  void FinishLoadingDocument();
+
+  // Loads information about the pages in the document and calculate the
+  // document size.
+  void LoadPageInfo(bool reload);
+
+  // Calculate which pages should be displayed right now.
+  void CalculateVisiblePages();
+
+  // Returns true iff the given page index is visible.  CalculateVisiblePages
+  // must have been called first.
+  bool IsPageVisible(int index) const;
+
+  // Checks if a page is now available, and if so marks it as such and returns
+  // true.  Otherwise, it will return false and will add the index to the given
+  // array if it's not already there.
+  bool CheckPageAvailable(int index, std::vector<int>* pending);
+
+  // Helper function to get a given page's size in pixels.  This is not part of
+  // PDFiumPage because we might not have that structure when we need this.
+  pp::Size GetPageSize(int index);
+
+  void UpdateTickMarks();
+
+  // Called to continue searching so we don't block the main thread.
+  void ContinueFind(int32_t result);
+
+  // Inserts a find result into find_results_, which is sorted.
+  void AddFindResult(const PDFiumRange& result);
+
+  // Search a page using PDFium's methods.  Doesn't work with unicode.  This
+  // function is just kept arount in case PDFium code is fixed.
+  void SearchUsingPDFium(const base::string16& term,
+                         bool case_sensitive,
+                         bool first_search,
+                         int character_to_start_searching_from,
+                         int current_page);
+
+  // Search a page ourself using ICU.
+  void SearchUsingICU(const base::string16& term,
+                      bool case_sensitive,
+                      bool first_search,
+                      int character_to_start_searching_from,
+                      int current_page);
+
+  // Input event handlers.
+  bool OnMouseDown(const pp::MouseInputEvent& event);
+  bool OnMouseUp(const pp::MouseInputEvent& event);
+  bool OnMouseMove(const pp::MouseInputEvent& event);
+  bool OnKeyDown(const pp::KeyboardInputEvent& event);
+  bool OnKeyUp(const pp::KeyboardInputEvent& event);
+  bool OnChar(const pp::KeyboardInputEvent& event);
+
+  pp::Buffer_Dev PrintPagesAsRasterPDF(
+      const PP_PrintPageNumberRange_Dev* page_ranges,
+      uint32_t page_range_count,
+      const PP_PrintSettings_Dev& print_settings);
+  pp::Buffer_Dev PrintPagesAsPDF(const PP_PrintPageNumberRange_Dev* page_ranges,
+                                 uint32_t page_range_count,
+                                 const PP_PrintSettings_Dev& print_settings);
+  pp::Buffer_Dev GetFlattenedPrintData(const FPDF_DOCUMENT& doc);
+  void FitContentsToPrintableAreaIfRequired(
+      const FPDF_DOCUMENT& doc,
+      const PP_PrintSettings_Dev& print_settings);
+  void SaveSelectedFormForPrint();
+
+  // Given a mouse event, returns which page and character location it's closest
+  // to.
+  PDFiumPage::Area GetCharIndex(const pp::MouseInputEvent& event,
+                                int* page_index,
+                                int* char_index,
+                                PDFiumPage::LinkTarget* target);
+  PDFiumPage::Area GetCharIndex(const pp::Point& point,
+                                int* page_index,
+                                int* char_index,
+                                PDFiumPage::LinkTarget* target);
+
+  void OnSingleClick(int page_index, int char_index);
+  void OnMultipleClick(int click_count, int page_index, int char_index);
+
+  // Starts a progressive paint operation given a rectangle in screen
+  // coordinates. Returns the index in progressive_rects_.
+  int StartPaint(int page_index, const pp::Rect& dirty);
+
+  // Continues a paint operation that was started earlier.  Returns true if the
+  // paint is done, or false if it needs to be continued.
+  bool ContinuePaint(int progressive_index, pp::ImageData* image_data);
+
+  // Called once PDFium is finished rendering a page so that we draw our
+  // borders, highlighting etc.
+  void FinishPaint(int progressive_index, pp::ImageData* image_data);
+
+  // Stops any paints that are in progress.
+  void CancelPaints();
+
+  // Invalidates all pages. Use this when some global parameter, such as page
+  // orientation, has changed.
+  void InvalidateAllPages();
+
+  // If the page is narrower than the document size, paint the extra space
+  // with the page background.
+  void FillPageSides(int progressive_index);
+
+  void PaintPageShadow(int progressive_index, pp::ImageData* image_data);
+
+  // Highlight visible find results and selections.
+  void DrawSelections(int progressive_index, pp::ImageData* image_data);
+
+  // Paints an page that hasn't finished downloading.
+  void PaintUnavailablePage(int page_index,
+                            const pp::Rect& dirty,
+                            pp::ImageData* image_data);
+
+  // Given a page index, returns the corresponding index in progressive_rects_,
+  // or -1 if it doesn't exist.
+  int GetProgressiveIndex(int page_index) const;
+
+  // Creates a FPDF_BITMAP from a rectangle in screen coordinates.
+  FPDF_BITMAP CreateBitmap(const pp::Rect& rect,
+                           pp::ImageData* image_data) const;
+
+  // Given a rectangle in screen coordinates, returns the coordinates in the
+  // units that PDFium rendering functions expect.
+  void GetPDFiumRect(int page_index, const pp::Rect& rect, int* start_x,
+                     int* start_y, int* size_x, int* size_y) const;
+
+  // Returns the rendering flags to pass to PDFium.
+  int GetRenderingFlags() const;
+
+  // Returns the currently visible rectangle in document coordinates.
+  pp::Rect GetVisibleRect() const;
+
+  // Returns a page's rect in screen coordinates, as well as its surrounding
+  // border areas and bottom separator.
+  pp::Rect GetPageScreenRect(int page_index) const;
+
+  // Given a rectangle in document coordinates, returns the rectange into screen
+  // coordinates (i.e. 0,0 is top left corner of plugin area).  If it's not
+  // visible, an empty rectangle is returned.
+  pp::Rect GetScreenRect(const pp::Rect& rect) const;
+
+  // Highlights the given rectangle.
+  void Highlight(void* buffer,
+                 int stride,
+                 const pp::Rect& rect,
+                 std::vector<pp::Rect>* highlighted_rects);
+
+  // Helper function to convert a device to page coordinates.  If the page is
+  // not yet loaded, page_x and page_y will be set to 0.
+  void DeviceToPage(int page_index,
+                    float device_x,
+                    float device_y,
+                    double* page_x,
+                    double* page_y);
+
+  // Helper function to get the index of a given FPDF_PAGE.  Returns -1 if not
+  // found.
+  int GetVisiblePageIndex(FPDF_PAGE page);
+
+  // Helper function to change the current page, running page open/close
+  // triggers as necessary.
+  void SetCurrentPage(int index);
+
+  // Transform |page| contents to fit in the selected printer paper size.
+  void TransformPDFPageForPrinting(FPDF_PAGE page,
+                                   const PP_PrintSettings_Dev& print_settings);
+
+  void DrawPageShadow(const pp::Rect& page_rect,
+                      const pp::Rect& shadow_rect,
+                      const pp::Rect& clip_rect,
+                      pp::ImageData* image_data);
+
+  void GetRegion(const pp::Point& location,
+                 pp::ImageData* image_data,
+                 void** region,
+                 int* stride) const;
+
+  // Called when the selection changes.
+  void OnSelectionChanged();
+
+  // FPDF_FORMFILLINFO callbacks.
+  static void Form_Invalidate(FPDF_FORMFILLINFO* param,
+                              FPDF_PAGE page,
+                              double left,
+                              double top,
+                              double right,
+                              double bottom);
+  static void Form_OutputSelectedRect(FPDF_FORMFILLINFO* param,
+                                      FPDF_PAGE page,
+                                      double left,
+                                      double top,
+                                      double right,
+                                      double bottom);
+  static void Form_SetCursor(FPDF_FORMFILLINFO* param, int cursor_type);
+  static int Form_SetTimer(FPDF_FORMFILLINFO* param,
+                           int elapse,
+                           TimerCallback timer_func);
+  static void Form_KillTimer(FPDF_FORMFILLINFO* param, int timer_id);
+  static FPDF_SYSTEMTIME Form_GetLocalTime(FPDF_FORMFILLINFO* param);
+  static void Form_OnChange(FPDF_FORMFILLINFO* param);
+  static FPDF_PAGE Form_GetPage(FPDF_FORMFILLINFO* param,
+                                FPDF_DOCUMENT document,
+                                int page_index);
+  static FPDF_PAGE Form_GetCurrentPage(FPDF_FORMFILLINFO* param,
+                                       FPDF_DOCUMENT document);
+  static int Form_GetRotation(FPDF_FORMFILLINFO* param, FPDF_PAGE page);
+  static void Form_ExecuteNamedAction(FPDF_FORMFILLINFO* param,
+                                      FPDF_BYTESTRING named_action);
+  static void Form_SetTextFieldFocus(FPDF_FORMFILLINFO* param,
+                                     FPDF_WIDESTRING value,
+                                     FPDF_DWORD valueLen,
+                                     FPDF_BOOL is_focus);
+  static void Form_DoURIAction(FPDF_FORMFILLINFO* param, FPDF_BYTESTRING uri);
+  static void Form_DoGoToAction(FPDF_FORMFILLINFO* param,
+                                int page_index,
+                                int zoom_mode,
+                                float* position_array,
+                                int size_of_array);
+
+  // IPDF_JSPLATFORM callbacks.
+  static int Form_Alert(IPDF_JSPLATFORM* param,
+                        FPDF_WIDESTRING message,
+                        FPDF_WIDESTRING title,
+                        int type,
+                        int icon);
+  static void Form_Beep(IPDF_JSPLATFORM* param, int type);
+  static int Form_Response(IPDF_JSPLATFORM* param,
+                           FPDF_WIDESTRING question,
+                           FPDF_WIDESTRING title,
+                           FPDF_WIDESTRING default_response,
+                           FPDF_WIDESTRING label,
+                           FPDF_BOOL password,
+                           void* response,
+                           int length);
+  static int Form_GetFilePath(IPDF_JSPLATFORM* param,
+                              void* file_path,
+                              int length);
+  static void Form_Mail(IPDF_JSPLATFORM* param,
+                        void* mail_data,
+                        int length,
+                        FPDF_BOOL ui,
+                        FPDF_WIDESTRING to,
+                        FPDF_WIDESTRING subject,
+                        FPDF_WIDESTRING cc,
+                        FPDF_WIDESTRING bcc,
+                        FPDF_WIDESTRING message);
+  static void Form_Print(IPDF_JSPLATFORM* param,
+                         FPDF_BOOL ui,
+                         int start,
+                         int end,
+                         FPDF_BOOL silent,
+                         FPDF_BOOL shrink_to_fit,
+                         FPDF_BOOL print_as_image,
+                         FPDF_BOOL reverse,
+                         FPDF_BOOL annotations);
+  static void Form_SubmitForm(IPDF_JSPLATFORM* param,
+                              void* form_data,
+                              int length,
+                              FPDF_WIDESTRING url);
+  static void Form_GotoPage(IPDF_JSPLATFORM* param, int page_number);
+  static int Form_Browse(IPDF_JSPLATFORM* param, void* file_path, int length);
+
+  // IFSDK_PAUSE callbacks
+  static FPDF_BOOL Pause_NeedToPauseNow(IFSDK_PAUSE* param);
+
+  PDFEngine::Client* client_;
+  pp::Size document_size_;  // Size of document in pixels.
+
+  // The scroll position in screen coordinates.
+  pp::Point position_;
+  // The offset of the page into the viewport.
+  pp::Point page_offset_;
+  // The plugin size in screen coordinates.
+  pp::Size plugin_size_;
+  double current_zoom_;
+  unsigned int current_rotation_;
+
+  DocumentLoader doc_loader_;  // Main document's loader.
+  std::string url_;
+  std::string headers_;
+  pp::CompletionCallbackFactory<PDFiumEngine> find_factory_;
+
+  pp::CompletionCallbackFactory<PDFiumEngine> password_factory_;
+  int32_t password_tries_remaining_;
+
+  // The current text used for searching.
+  std::string current_find_text_;
+
+  // The PDFium wrapper object for the document.
+  FPDF_DOCUMENT doc_;
+
+  // The PDFium wrapper for form data.  Used even if there are no form controls
+  // on the page.
+  FPDF_FORMHANDLE form_;
+
+  // The page(s) of the document. Store a vector of pointers so that when the
+  // vector is resized we don't close the pages that are used in pending
+  // paints.
+  std::vector<PDFiumPage*> pages_;
+
+  // The indexes of the pages currently visible.
+  std::vector<int> visible_pages_;
+
+  // The indexes of the pages pending download.
+  std::vector<int> pending_pages_;
+
+  // During handling of input events we don't want to unload any pages in
+  // callbacks to us from PDFium, since the current page can change while PDFium
+  // code still has a pointer to it.
+  bool defer_page_unload_;
+  std::vector<int> deferred_page_unloads_;
+
+  // Used for selection.  There could be more than one range if selection spans
+  // more than one page.
+  std::vector<PDFiumRange> selection_;
+  // True if we're in the middle of selection.
+  bool selecting_;
+
+  // Used for searching.
+  typedef std::vector<PDFiumRange> FindResults;
+  FindResults find_results_;
+  // Which page to search next.
+  int next_page_to_search_;
+  // Where to stop searching.
+  int last_page_to_search_;
+  int last_character_index_to_search_;  // -1 if search until end of page.
+  // Which result the user has currently selected.
+  int current_find_index_;
+
+  // Permissions bitfield.
+  unsigned long permissions_;
+
+  // Interface structure to provide access to document stream.
+  FPDF_FILEACCESS file_access_;
+  // Interface structure to check data availability in the document stream.
+  FileAvail file_availability_;
+  // Interface structure to request data chunks from the document stream.
+  DownloadHints download_hints_;
+  // Pointer to the document availability interface.
+  FPDF_AVAIL fpdf_availability_;
+
+  pp::Size default_page_size_;
+
+  // Used to manage timers that form fill API needs.  The pair holds the timer
+  // period, in ms, and the callback function.
+  std::map<int, std::pair<int, TimerCallback> > timers_;
+  int next_timer_id_;
+
+  // Holds the page index of the last page that the mouse clicked on.
+  int last_page_mouse_down_;
+
+  // Holds the page index of the first visible page; refreshed by calling
+  // CalculateVisiblePages()
+  int first_visible_page_;
+
+  // Holds the page index of the most visible page; refreshed by calling
+  // CalculateVisiblePages()
+  int most_visible_page_;
+
+  // Set to true after FORM_DoDocumentJSAction/FORM_DoDocumentOpenAction have
+  // been called. Only after that can we call FORM_DoPageAAction.
+  bool called_do_document_action_;
+
+  // Records parts of form fields that need to be highlighted at next paint, in
+  // screen coordinates.
+  std::vector<pp::Rect> form_highlights_;
+
+  // Whether to render in grayscale or in color.
+  bool render_grayscale_;
+
+  // The link currently under the cursor.
+  std::string link_under_cursor_;
+
+  // Pending progressive paints.
+  struct ProgressivePaint {
+    pp::Rect rect;  // In screen coordinates.
+    FPDF_BITMAP bitmap;
+    int page_index;
+    // Temporary used to figure out if in a series of Paint() calls whether this
+    // pending paint was updated or not.
+    int painted_;
+  };
+  std::vector<ProgressivePaint> progressive_paints_;
+
+  // Keeps track of when we started the last progressive paint, so that in our
+  // callback we can determine if we need to pause.
+  base::Time last_progressive_start_time_;
+
+  // The timeout to use for the current progressive paint.
+  int progressive_paint_timeout_;
+
+  // Shadow matrix for generating the page shadow bitmap.
+  scoped_ptr<ShadowMatrix> page_shadow_;
+
+  // Set to true if the user is being prompted for their password. Will be set
+  // to false after the user finishes getting their password.
+  bool getting_password_;
+};
+
+// Create a local variable of this when calling PDFium functions which can call
+// our global callback when an unsupported feature is reached.
+class ScopedUnsupportedFeature {
+ public:
+  explicit ScopedUnsupportedFeature(PDFiumEngine* engine);
+  ~ScopedUnsupportedFeature();
+ private:
+  PDFiumEngine* engine_;
+  PDFiumEngine* old_engine_;
+};
+
+class PDFiumEngineExports : public PDFEngineExports {
+ public:
+  PDFiumEngineExports() {}
+#if defined(OS_WIN)
+  // See the definition of RenderPDFPageToDC in pdf.cc for details.
+  virtual bool RenderPDFPageToDC(const void* pdf_buffer,
+                                 int buffer_size,
+                                 int page_number,
+                                 const RenderingSettings& settings,
+                                 HDC dc);
+#endif  // OS_WIN
+  virtual bool RenderPDFPageToBitmap(const void* pdf_buffer,
+                                     int pdf_buffer_size,
+                                     int page_number,
+                                     const RenderingSettings& settings,
+                                     void* bitmap_buffer);
+
+  virtual bool GetPDFDocInfo(const void* pdf_buffer,
+                             int buffer_size,
+                             int* page_count,
+                             double* max_page_width);
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_ENGINE_H_

pdf/pdfium/pdfium_mem_buffer_file_read.cc

@@ -0,0 +1,34 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
+
+#include <string.h>
+
+namespace chrome_pdf {
+
+PDFiumMemBufferFileRead::PDFiumMemBufferFileRead(const void* data,
+                                                 size_t size) {
+  m_FileLen = size;
+  m_Param = this;
+  m_GetBlock = &GetBlock;
+  data_ = reinterpret_cast<const unsigned char*>(data);
+}
+
+PDFiumMemBufferFileRead::~PDFiumMemBufferFileRead() {
+}
+
+int PDFiumMemBufferFileRead::GetBlock(void* param,
+                                      unsigned long position,
+                                      unsigned char* buf,
+                                      unsigned long size) {
+  const PDFiumMemBufferFileRead* data =
+      reinterpret_cast<const PDFiumMemBufferFileRead*>(param);
+  if (!data || position + size > data->m_FileLen)
+    return 0;
+  memcpy(buf, data->data_ + position, size);
+  return 1;
+}
+
+}  // namespace chrome_pdf

pdf/pdfium/pdfium_mem_buffer_file_read.h

@@ -0,0 +1,30 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_READ_H_
+#define PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_READ_H_
+
+#include <stdlib.h>
+
+#include "third_party/pdfium/fpdfsdk/include/fpdfview.h"
+
+namespace chrome_pdf {
+
+// Implementation of FPDF_FILEACCESS from a memory buffer.
+class PDFiumMemBufferFileRead : public FPDF_FILEACCESS {
+ public:
+  PDFiumMemBufferFileRead(const void* data, size_t size);
+  ~PDFiumMemBufferFileRead();
+
+ private:
+  static int GetBlock(void* param,
+                      unsigned long position,
+                      unsigned char* buf,
+                      unsigned long size);
+  const unsigned char* data_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_READ_H_

pdf/pdfium/pdfium_mem_buffer_file_write.cc

@@ -0,0 +1,33 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdfium/pdfium_mem_buffer_file_write.h"
+
+namespace chrome_pdf {
+
+PDFiumMemBufferFileWrite::PDFiumMemBufferFileWrite() {
+  version = 1;
+  WriteBlock = &WriteBlockImpl;
+}
+
+PDFiumMemBufferFileWrite::~PDFiumMemBufferFileWrite() {
+}
+
+int PDFiumMemBufferFileWrite::WriteBlockImpl(FPDF_FILEWRITE* this_file_write,
+                                             const void* data,
+                                             unsigned long size) {
+  PDFiumMemBufferFileWrite* mem_buffer_file_write =
+      static_cast<PDFiumMemBufferFileWrite*>(this_file_write);
+  return mem_buffer_file_write->DoWriteBlock(data, size);
+}
+
+int PDFiumMemBufferFileWrite::DoWriteBlock(const void* data,
+                                           unsigned long size) {
+  buffer_.append(static_cast<const unsigned char*>(data), size);
+  return 1;
+}
+
+
+}  // namespace chrome_pdf
+

pdf/pdfium/pdfium_mem_buffer_file_write.h

@@ -0,0 +1,34 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_WRITE_
+#define PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_WRITE_
+
+#include <string>
+
+#include "third_party/pdfium/fpdfsdk/include/fpdfsave.h"
+
+namespace chrome_pdf {
+
+// Implementation of FPDF_FILEWRITE into a memory buffer.
+class PDFiumMemBufferFileWrite : public FPDF_FILEWRITE {
+ public:
+  PDFiumMemBufferFileWrite();
+  ~PDFiumMemBufferFileWrite();
+
+  const std::basic_string<unsigned char>& buffer() { return buffer_; }
+  size_t size() { return buffer_.size(); }
+
+ private:
+  int DoWriteBlock(const void* data, unsigned long size);
+  static int WriteBlockImpl(FPDF_FILEWRITE* this_file_write, const void* data,
+                            unsigned long size);
+
+  std::basic_string<unsigned char> buffer_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_MEM_BUFFER_FILE_WRITE_
+

pdf/pdfium/pdfium_page.cc

@@ -0,0 +1,478 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdfium/pdfium_page.h"
+
+#include <math.h>
+
+#include "base/logging.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/string_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/values.h"
+#include "pdf/pdfium/pdfium_engine.h"
+
+// Used when doing hit detection.
+#define kTolerance 20.0
+
+// Dictionary Value key names for returning the accessible page content as JSON.
+const char kPageWidth[] = "width";
+const char kPageHeight[] = "height";
+const char kPageTextBox[] = "textBox";
+const char kTextBoxLeft[] = "left";
+const char kTextBoxTop[]  = "top";
+const char kTextBoxWidth[] = "width";
+const char kTextBoxHeight[]  = "height";
+const char kTextBoxFontSize[] = "fontSize";
+const char kTextBoxNodes[] = "textNodes";
+const char kTextNodeType[] = "type";
+const char kTextNodeText[] = "text";
+const char kTextNodeURL[] = "url";
+const char kTextNodeTypeText[] = "text";
+const char kTextNodeTypeURL[] = "url";
+const char kDocLinkURLPrefix[] = "#page";
+
+namespace chrome_pdf {
+
+PDFiumPage::PDFiumPage(PDFiumEngine* engine,
+                       int i,
+                       const pp::Rect& r,
+                       bool available)
+    : engine_(engine),
+      page_(NULL),
+      text_page_(NULL),
+      index_(i),
+      rect_(r),
+      calculated_links_(false),
+      available_(available) {
+}
+
+PDFiumPage::~PDFiumPage() {
+  Unload();
+}
+
+void PDFiumPage::Unload() {
+  if (text_page_) {
+    FPDFText_ClosePage(text_page_);
+    text_page_ = NULL;
+  }
+
+  if (page_) {
+    if (engine_->form()) {
+      FORM_OnBeforeClosePage(page_, engine_->form());
+    }
+    FPDF_ClosePage(page_);
+    page_ = NULL;
+  }
+}
+
+FPDF_PAGE PDFiumPage::GetPage() {
+  ScopedUnsupportedFeature scoped_unsupported_feature(engine_);
+  if (!available_)
+    return NULL;
+  if (!page_) {
+    page_ = FPDF_LoadPage(engine_->doc(), index_);
+    if (page_ && engine_->form()) {
+      FORM_OnAfterLoadPage(page_, engine_->form());
+    }
+  }
+  return page_;
+}
+
+FPDF_PAGE PDFiumPage::GetPrintPage() {
+  ScopedUnsupportedFeature scoped_unsupported_feature(engine_);
+  if (!available_)
+    return NULL;
+  if (!page_)
+    page_ = FPDF_LoadPage(engine_->doc(), index_);
+  return page_;
+}
+
+void PDFiumPage::ClosePrintPage() {
+  if (page_) {
+    FPDF_ClosePage(page_);
+    page_ = NULL;
+  }
+}
+
+FPDF_TEXTPAGE PDFiumPage::GetTextPage() {
+  if (!available_)
+    return NULL;
+  if (!text_page_)
+    text_page_ = FPDFText_LoadPage(GetPage());
+  return text_page_;
+}
+
+base::Value* PDFiumPage::GetAccessibleContentAsValue(int rotation) {
+  base::DictionaryValue* node = new base::DictionaryValue();
+
+  if (!available_)
+    return node;
+
+  double width = FPDF_GetPageWidth(GetPage());
+  double height = FPDF_GetPageHeight(GetPage());
+
+  base::ListValue* text = new base::ListValue();
+  int box_count = FPDFText_CountRects(GetTextPage(), 0, GetCharCount());
+  for (int i = 0; i < box_count; i++) {
+    double left, top, right, bottom;
+    FPDFText_GetRect(GetTextPage(), i, &left, &top, &right, &bottom);
+    text->Append(
+        GetTextBoxAsValue(height, left, top, right, bottom, rotation));
+  }
+
+  node->SetDouble(kPageWidth, width);
+  node->SetDouble(kPageHeight, height);
+  node->Set(kPageTextBox, text);  // Takes ownership of |text|
+
+  return node;
+}
+
+base::Value* PDFiumPage::GetTextBoxAsValue(double page_height,
+                                           double left, double top,
+                                           double right, double bottom,
+                                           int rotation) {
+  base::string16 text_utf16;
+  int char_count =
+    FPDFText_GetBoundedText(GetTextPage(), left, top, right, bottom, NULL, 0);
+  if (char_count > 0) {
+    unsigned short* data = reinterpret_cast<unsigned short*>(
+        WriteInto(&text_utf16, char_count + 1));
+    FPDFText_GetBoundedText(GetTextPage(),
+                            left, top, right, bottom,
+                            data, char_count);
+  }
+  std::string text_utf8 = base::UTF16ToUTF8(text_utf16);
+
+  FPDF_LINK link = FPDFLink_GetLinkAtPoint(GetPage(), left, top);
+  Area area;
+  std::vector<LinkTarget> targets;
+  if (link) {
+    targets.push_back(LinkTarget());
+    area = GetLinkTarget(link, &targets[0]);
+  } else {
+    pp::Rect rect(
+        PageToScreen(pp::Point(), 1.0, left, top, right, bottom, rotation));
+    GetLinks(rect, &targets);
+    area = targets.size() == 0 ? TEXT_AREA : WEBLINK_AREA;
+  }
+
+  int char_index = FPDFText_GetCharIndexAtPos(GetTextPage(), left, top,
+                                              kTolerance, kTolerance);
+  double font_size = FPDFText_GetFontSize(GetTextPage(), char_index);
+
+  base::DictionaryValue* node = new base::DictionaryValue();
+  node->SetDouble(kTextBoxLeft, left);
+  node->SetDouble(kTextBoxTop, page_height - top);
+  node->SetDouble(kTextBoxWidth, right - left);
+  node->SetDouble(kTextBoxHeight, top - bottom);
+  node->SetDouble(kTextBoxFontSize, font_size);
+
+  base::ListValue* text_nodes = new base::ListValue();
+
+  if (area == DOCLINK_AREA) {
+    std::string url = kDocLinkURLPrefix + base::IntToString(targets[0].page);
+    text_nodes->Append(CreateURLNode(text_utf8, url));
+  } else if (area == WEBLINK_AREA && link) {
+    text_nodes->Append(CreateURLNode(text_utf8, targets[0].url));
+  } else if (area == WEBLINK_AREA && !link) {
+    size_t start = 0;
+    for (size_t i = 0; i < targets.size(); ++i) {
+      // Remove the extra NULL character at end.
+      // Otherwise, find() will not return any matches.
+      if (targets[i].url.size() > 0 &&
+          targets[i].url[targets[i].url.size() - 1] == '\0') {
+        targets[i].url.resize(targets[i].url.size() - 1);
+      }
+      // There should only ever be one NULL character
+      DCHECK(targets[i].url[targets[i].url.size() - 1] != '\0');
+
+      // PDFium may change the case of generated links.
+      std::string lowerCaseURL = StringToLowerASCII(targets[i].url);
+      std::string lowerCaseText = StringToLowerASCII(text_utf8);
+      size_t pos = lowerCaseText.find(lowerCaseURL, start);
+      size_t length = targets[i].url.size();
+      if (pos == std::string::npos) {
+        // Check if the link is a "mailto:" URL
+        if (lowerCaseURL.compare(0, 7, "mailto:") == 0) {
+          pos = lowerCaseText.find(lowerCaseURL.substr(7), start);
+          length -= 7;
+        }
+
+        if (pos == std::string::npos) {
+          // No match has been found.  This should never happen.
+          continue;
+        }
+      }
+
+      std::string before_text = text_utf8.substr(start, pos - start);
+      if (before_text.size() > 0)
+        text_nodes->Append(CreateTextNode(before_text));
+      std::string link_text = text_utf8.substr(pos, length);
+      text_nodes->Append(CreateURLNode(link_text, targets[i].url));
+
+      start = pos + length;
+    }
+    std::string before_text = text_utf8.substr(start);
+    if (before_text.size() > 0)
+      text_nodes->Append(CreateTextNode(before_text));
+  } else {
+    text_nodes->Append(CreateTextNode(text_utf8));
+  }
+
+  node->Set(kTextBoxNodes, text_nodes);  // Takes ownership of |text_nodes|.
+  return node;
+}
+
+base::Value* PDFiumPage::CreateTextNode(std::string text) {
+  base::DictionaryValue* node = new base::DictionaryValue();
+  node->SetString(kTextNodeType, kTextNodeTypeText);
+  node->SetString(kTextNodeText, text);
+  return node;
+}
+
+base::Value* PDFiumPage::CreateURLNode(std::string text, std::string url) {
+  base::DictionaryValue* node = new base::DictionaryValue();
+  node->SetString(kTextNodeType, kTextNodeTypeURL);
+  node->SetString(kTextNodeText, text);
+  node->SetString(kTextNodeURL, url);
+  return node;
+}
+
+PDFiumPage::Area PDFiumPage::GetCharIndex(const pp::Point& point,
+                                          int rotation,
+                                          int* char_index,
+                                          LinkTarget* target) {
+  if (!available_)
+    return NONSELECTABLE_AREA;
+  pp::Point point2 = point - rect_.point();
+  double new_x, new_y;
+  FPDF_DeviceToPage(GetPage(), 0, 0, rect_.width(), rect_.height(),
+        rotation, point2.x(), point2.y(), &new_x, &new_y);
+
+  int rv = FPDFText_GetCharIndexAtPos(
+      GetTextPage(), new_x, new_y, kTolerance, kTolerance);
+  *char_index = rv;
+
+  FPDF_LINK link = FPDFLink_GetLinkAtPoint(GetPage(), new_x, new_y);
+  if (link) {
+    // We don't handle all possible link types of the PDF. For example,
+    // launch actions, cross-document links, etc.
+    // In that case, GetLinkTarget() will return NONSELECTABLE_AREA
+    // and we should proceed with area detection.
+    PDFiumPage::Area area = GetLinkTarget(link, target);
+    if (area != PDFiumPage::NONSELECTABLE_AREA)
+      return area;
+  }
+
+  if (rv < 0)
+    return NONSELECTABLE_AREA;
+
+  return GetLink(*char_index, target) != -1 ? WEBLINK_AREA : TEXT_AREA;
+}
+
+base::char16 PDFiumPage::GetCharAtIndex(int index) {
+  if (!available_)
+    return L'\0';
+  return static_cast<base::char16>(FPDFText_GetUnicode(GetTextPage(), index));
+}
+
+int PDFiumPage::GetCharCount() {
+  if (!available_)
+    return 0;
+  return FPDFText_CountChars(GetTextPage());
+}
+
+PDFiumPage::Area PDFiumPage::GetLinkTarget(
+    FPDF_LINK link, PDFiumPage::LinkTarget* target) {
+  FPDF_DEST dest = FPDFLink_GetDest(engine_->doc(), link);
+  if (dest != NULL)
+    return GetDestinationTarget(dest, target);
+
+  FPDF_ACTION action = FPDFLink_GetAction(link);
+  if (action) {
+    switch (FPDFAction_GetType(action)) {
+      case PDFACTION_GOTO: {
+          FPDF_DEST dest = FPDFAction_GetDest(engine_->doc(), action);
+          if (dest)
+            return GetDestinationTarget(dest, target);
+          // TODO(gene): We don't fully support all types of the in-document
+          // links. Need to implement that. There is a bug to track that:
+          // http://code.google.com/p/chromium/issues/detail?id=55776
+        } break;
+      case PDFACTION_URI: {
+          if (target) {
+            size_t buffer_size =
+                FPDFAction_GetURIPath(engine_->doc(), action, NULL, 0);
+            if (buffer_size > 1) {
+              void* data = WriteInto(&target->url, buffer_size);
+              FPDFAction_GetURIPath(engine_->doc(), action, data, buffer_size);
+            }
+          }
+          return WEBLINK_AREA;
+        } break;
+      // TODO(gene): We don't support PDFACTION_REMOTEGOTO and PDFACTION_LAUNCH
+      // at the moment.
+    }
+  }
+
+  return NONSELECTABLE_AREA;
+}
+
+PDFiumPage::Area PDFiumPage::GetDestinationTarget(
+    FPDF_DEST destination, PDFiumPage::LinkTarget* target) {
+  int page_index = FPDFDest_GetPageIndex(engine_->doc(), destination);
+  if (target) {
+    target->page = page_index;
+  }
+  return DOCLINK_AREA;
+}
+
+int PDFiumPage::GetLink(int char_index, PDFiumPage::LinkTarget* target) {
+  if (!available_)
+    return -1;
+
+  CalculateLinks();
+
+  // Get the bounding box of the rect again, since it might have moved because
+  // of the tolerance above.
+  double left, right, bottom, top;
+  FPDFText_GetCharBox(GetTextPage(), char_index, &left, &right, &bottom, &top);
+
+  pp::Point origin(
+      PageToScreen(pp::Point(), 1.0, left, top, right, bottom, 0).point());
+  for (size_t i = 0; i < links_.size(); ++i) {
+    for (size_t j = 0; j < links_[i].rects.size(); ++j) {
+      if (links_[i].rects[j].Contains(origin)) {
+        if (target)
+          target->url = links_[i].url;
+        return i;
+      }
+    }
+  }
+  return -1;
+}
+
+std::vector<int> PDFiumPage::GetLinks(pp::Rect text_area,
+                                      std::vector<LinkTarget>* targets) {
+  if (!available_)
+    return std::vector<int>();
+
+  CalculateLinks();
+
+  std::vector<int> links;
+
+  for (size_t i = 0; i < links_.size(); ++i) {
+    for (size_t j = 0; j < links_[i].rects.size(); ++j) {
+      if (links_[i].rects[j].Intersects(text_area)) {
+        if (targets) {
+          LinkTarget target;
+          target.url = links_[i].url;
+          targets->push_back(target);
+        }
+        links.push_back(i);
+      }
+    }
+  }
+  return links;
+}
+
+void PDFiumPage::CalculateLinks() {
+  if (calculated_links_)
+    return;
+
+  calculated_links_ = true;
+  FPDF_PAGELINK links = FPDFLink_LoadWebLinks(GetTextPage());
+  int count = FPDFLink_CountWebLinks(links);
+  for (int i = 0; i < count; ++i) {
+    base::string16 url;
+    int url_length = FPDFLink_GetURL(links, i, NULL, 0);
+    if (url_length > 0) {
+      unsigned short* data =
+          reinterpret_cast<unsigned short*>(WriteInto(&url, url_length + 1));
+      FPDFLink_GetURL(links, i, data, url_length);
+    }
+    Link link;
+    link.url = base::UTF16ToUTF8(url);
+
+    // If the link cannot be converted to a pp::Var, then it is not possible to
+    // pass it to JS. In this case, ignore the link like other PDF viewers.
+    // See http://crbug.com/312882 for an example.
+    pp::Var link_var(link.url);
+    if (!link_var.is_string())
+      continue;
+
+    // Make sure all the characters in the URL are valid per RFC 1738.
+    // http://crbug.com/340326 has a sample bad PDF.
+    // GURL does not work correctly, e.g. it just strips \t \r \n.
+    bool is_invalid_url = false;
+    for (size_t j = 0; j < link.url.length(); ++j) {
+      // Control characters are not allowed.
+      // 0x7F is also a control character.
+      // 0x80 and above are not in US-ASCII.
+      if (link.url[j] < ' ' || link.url[j] >= '\x7F') {
+        is_invalid_url = true;
+        break;
+      }
+    }
+    if (is_invalid_url)
+      continue;
+
+    int rect_count = FPDFLink_CountRects(links, i);
+    for (int j = 0; j < rect_count; ++j) {
+      double left, top, right, bottom;
+      FPDFLink_GetRect(links, i, j, &left, &top, &right, &bottom);
+      link.rects.push_back(
+          PageToScreen(pp::Point(), 1.0, left, top, right, bottom, 0));
+    }
+    links_.push_back(link);
+  }
+  FPDFLink_CloseWebLinks(links);
+}
+
+pp::Rect PDFiumPage::PageToScreen(const pp::Point& offset,
+                                  double zoom,
+                                  double left,
+                                  double top,
+                                  double right,
+                                  double bottom,
+                                  int rotation) {
+  if (!available_)
+    return pp::Rect();
+
+  int new_left, new_top, new_right, new_bottom;
+  FPDF_PageToDevice(
+      page_,
+      static_cast<int>((rect_.x() - offset.x()) * zoom),
+      static_cast<int>((rect_.y() - offset.y()) * zoom),
+      static_cast<int>(ceil(rect_.width() * zoom)),
+      static_cast<int>(ceil(rect_.height() * zoom)),
+      rotation, left, top, &new_left, &new_top);
+  FPDF_PageToDevice(
+      page_,
+      static_cast<int>((rect_.x() - offset.x()) * zoom),
+      static_cast<int>((rect_.y() - offset.y()) * zoom),
+      static_cast<int>(ceil(rect_.width() * zoom)),
+      static_cast<int>(ceil(rect_.height() * zoom)),
+      rotation, right, bottom, &new_right, &new_bottom);
+
+  // If the PDF is rotated, the horizontal/vertical coordinates could be
+  // flipped.  See
+  // http://www.netl.doe.gov/publications/proceedings/03/ubc/presentations/Goeckner-pres.pdf
+  if (new_right < new_left)
+    std::swap(new_right, new_left);
+  if (new_bottom < new_top)
+    std::swap(new_bottom, new_top);
+
+  return pp::Rect(
+      new_left, new_top, new_right - new_left + 1, new_bottom - new_top + 1);
+}
+
+PDFiumPage::Link::Link() {
+}
+
+PDFiumPage::Link::~Link() {
+}
+
+}  // namespace chrome_pdf

pdf/pdfium/pdfium_page.h

@@ -0,0 +1,136 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDFIUM_PDFIUM_PAGE_H_
+#define PDF_PDFIUM_PDFIUM_PAGE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "ppapi/cpp/rect.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfdoc.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfformfill.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdftext.h"
+
+namespace base {
+class Value;
+}
+
+namespace chrome_pdf {
+
+class PDFiumEngine;
+
+// Wrapper around a page from the document.
+class PDFiumPage {
+ public:
+  PDFiumPage(PDFiumEngine* engine,
+             int i,
+             const pp::Rect& r,
+             bool available);
+  ~PDFiumPage();
+  // Unloads the PDFium data for this page from memory.
+  void Unload();
+  // Gets the FPDF_PAGE for this page, loading and parsing it if necessary.
+  FPDF_PAGE GetPage();
+  //Get the FPDF_PAGE for printing.
+  FPDF_PAGE GetPrintPage();
+  //Close the printing page.
+  void ClosePrintPage();
+
+  // Returns FPDF_TEXTPAGE for the page, loading and parsing it if necessary.
+  FPDF_TEXTPAGE GetTextPage();
+
+  // Returns a DictionaryValue version of the page.
+  base::Value* GetAccessibleContentAsValue(int rotation);
+
+  enum Area {
+    NONSELECTABLE_AREA,
+    TEXT_AREA,
+    WEBLINK_AREA,  // Area is a hyperlink.
+    DOCLINK_AREA,  // Area is a link to a different part of the same document.
+  };
+
+  struct LinkTarget {
+    // We are using std::string here which have a copy contructor.
+    // That prevents us from using union here.
+    std::string url;  // Valid for WEBLINK_AREA only.
+    int page;         // Valid for DOCLINK_AREA only.
+  };
+
+  // Given a point in the document that's in this page, returns its character
+  // index if it's near a character, and also the type of text.
+  // Target is optional. It will be filled in for WEBLINK_AREA or
+  // DOCLINK_AREA only.
+  Area GetCharIndex(const pp::Point& point, int rotation, int* char_index,
+                    LinkTarget* target);
+
+  // Gets the character at the given index.
+  base::char16 GetCharAtIndex(int index);
+
+  // Gets the number of characters in the page.
+  int GetCharCount();
+
+  // Converts from page coordinates to screen coordinates.
+  pp::Rect PageToScreen(const pp::Point& offset,
+                        double zoom,
+                        double left,
+                        double top,
+                        double right,
+                        double bottom,
+                        int rotation);
+
+  int index() const { return index_; }
+  pp::Rect rect() const { return rect_; }
+  void set_rect(const pp::Rect& r) { rect_ = r; }
+  bool available() const { return available_; }
+  void set_available(bool available) { available_ = available; }
+  void set_calculated_links(bool calculated_links) {
+     calculated_links_ = calculated_links;
+  }
+
+ private:
+  // Returns a link index if the given character index is over a link, or -1
+  // otherwise.
+  int GetLink(int char_index, LinkTarget* target);
+  // Returns the link indices if the given rect intersects a link rect, or an
+  // empty vector otherwise.
+  std::vector<int> GetLinks(pp::Rect text_area,
+                            std::vector<LinkTarget>* targets);
+  // Calculate the locations of any links on the page.
+  void CalculateLinks();
+  // Returns link type and target associated with a link. Returns
+  // NONSELECTABLE_AREA if link detection failed.
+  Area GetLinkTarget(FPDF_LINK link, LinkTarget* target);
+  // Returns target associated with a destination.
+  Area GetDestinationTarget(FPDF_DEST destination, LinkTarget* target);
+  // Returns the text in the supplied box as a Value Node
+  base::Value* GetTextBoxAsValue(double page_height, double left, double top,
+                                 double right, double bottom, int rotation);
+  // Helper functions for JSON generation
+  base::Value* CreateTextNode(std::string text);
+  base::Value* CreateURLNode(std::string text, std::string url);
+
+  struct Link {
+    Link();
+    ~Link();
+
+    std::string url;
+    // Bounding rectangles of characters.
+    std::vector<pp::Rect> rects;
+  };
+
+  PDFiumEngine* engine_;
+  FPDF_PAGE page_;
+  FPDF_TEXTPAGE text_page_;
+  int index_;
+  pp::Rect rect_;
+  bool calculated_links_;
+  std::vector<Link> links_;
+  bool available_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_PAGE_H_

pdf/pdfium/pdfium_range.cc

@@ -0,0 +1,79 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/pdfium/pdfium_range.h"
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+
+namespace chrome_pdf {
+
+PDFiumRange::PDFiumRange(PDFiumPage* page, int char_index, int char_count)
+    : page_(page),
+      char_index_(char_index),
+      char_count_(char_count),
+      cached_screen_rects_zoom_(0) {
+}
+
+PDFiumRange::~PDFiumRange() {
+}
+
+void PDFiumRange::SetCharCount(int char_count) {
+  char_count_ = char_count;
+
+  cached_screen_rects_offset_ = pp::Point();
+  cached_screen_rects_zoom_ = 0;
+}
+
+std::vector<pp::Rect> PDFiumRange::GetScreenRects(const pp::Point& offset,
+                                                  double zoom,
+                                                  int rotation) {
+  if (offset == cached_screen_rects_offset_ &&
+      zoom == cached_screen_rects_zoom_) {
+    return cached_screen_rects_;
+  }
+
+  cached_screen_rects_.clear();
+  cached_screen_rects_offset_ = offset;
+  cached_screen_rects_zoom_ = zoom;
+
+  int char_index = char_index_;
+  int char_count = char_count_;
+  if (char_count < 0) {
+    char_count *= -1;
+    char_index -= char_count - 1;
+  }
+
+  int count = FPDFText_CountRects(page_->GetTextPage(), char_index, char_count);
+  for (int i = 0; i < count; ++i) {
+    double left, top, right, bottom;
+    FPDFText_GetRect(page_->GetTextPage(), i, &left, &top, &right, &bottom);
+    cached_screen_rects_.push_back(
+        page_->PageToScreen(offset, zoom, left, top, right, bottom, rotation));
+  }
+
+  return cached_screen_rects_;
+}
+
+base::string16 PDFiumRange::GetText() {
+  int index = char_index_;
+  int count = char_count_;
+  if (!count)
+    return base::string16();
+  if (count < 0) {
+    count *= -1;
+    index -= count - 1;
+  }
+
+  base::string16 rv;
+  unsigned short* data =
+      reinterpret_cast<unsigned short*>(WriteInto(&rv, count + 1));
+  if (data) {
+    int written = FPDFText_GetText(page_->GetTextPage(), index, count, data);
+    rv.reserve(written);
+  }
+  return rv;
+}
+
+}  // namespace chrome_pdf

pdf/pdfium/pdfium_range.h

@@ -0,0 +1,54 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PDFIUM_PDFIUM_RANGE_H_
+#define PDF_PDFIUM_PDFIUM_RANGE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/strings/string16.h"
+#include "pdf/pdfium/pdfium_page.h"
+#include "ppapi/cpp/rect.h"
+
+namespace chrome_pdf {
+
+// Describes location of a string of characters.
+class PDFiumRange {
+ public:
+  PDFiumRange(PDFiumPage* page, int char_index, int char_count);
+  ~PDFiumRange();
+
+  // Update how many characters are in the selection.  Could be negative if
+  // backwards.
+  void SetCharCount(int char_count);
+
+  int page_index() const { return page_->index(); }
+  int char_index() const { return char_index_; }
+  int char_count() const { return char_count_; }
+
+  // Gets bounding rectangles of range in screen coordinates.
+  std::vector<pp::Rect> GetScreenRects(const pp::Point& offset,
+                                       double zoom,
+                                       int rotation);
+
+  // Gets the string of characters in this range.
+  base::string16 GetText();
+
+ private:
+  PDFiumPage* page_;
+  // Index of first character.
+  int char_index_;
+  // How many characters are part of this range (negative if  backwards).
+  int char_count_;
+
+  // Cache of ScreenRect, and the associated variables used when caching it.
+  std::vector<pp::Rect> cached_screen_rects_;
+  pp::Point cached_screen_rects_offset_;
+  double cached_screen_rects_zoom_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PDFIUM_PDFIUM_RANGE_H_

pdf/pdfium/pdfium_test.cc

@@ -0,0 +1,312 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <list>
+#include <string>
+#include <utility>
+
+#include "base/at_exit.h"
+#include "base/i18n/icu_util.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_dataavail.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdf_ext.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfformfill.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdftext.h"
+#include "third_party/pdfium/fpdfsdk/include/fpdfview.h"
+
+#ifdef _WIN32
+  #define snprintf _snprintf
+  /* in Windows, rb for open and read binary file */
+  #define FOPEN_READ "rb"
+#else
+  #define FOPEN_READ "r"
+#endif
+
+static void write_file(const char* pdf_name, int num,
+                       const char* buffer, int stride, int width, int height) {
+  if (stride < 0 || width < 0 || height < 0)
+    return;
+  if (height > 0 && width > INT_MAX / height)
+    return;
+  int out_len = width * height;
+  if (out_len > INT_MAX / 3)
+    return;
+  out_len *= 3;
+
+  char filename[256];
+  snprintf(filename, sizeof(filename), "%s.%d.ppm", pdf_name, num);
+  FILE* fp = fopen(filename, "w");
+  if (!fp)
+    return;
+  fprintf(fp, "P6\n# PDF test render\n%d %d\n255\n", width, height);
+  // Source data is B, G, R, unused.
+  // Dest data is R, G, B.
+  char* result = new char[out_len];
+  if (result) {
+    int h, w;
+    for (h = 0; h < height; ++h) {
+      const char* src_line = buffer + (stride * h);
+      char* dest_line = result + (width * h * 3);
+      for (w = 0; w < width; ++w) {
+        // R
+        dest_line[w * 3] = src_line[(w * 4) + 2];
+        // G
+        dest_line[(w * 3) + 1] = src_line[(w * 4) + 1];
+        // B
+        dest_line[(w * 3) + 2] = src_line[w * 4];
+      }
+    }
+    fwrite(result, out_len, 1, fp);
+    delete [] result;
+  }
+  fclose(fp);
+}
+
+int Form_Alert(IPDF_JSPLATFORM*, FPDF_WIDESTRING, FPDF_WIDESTRING, int, int) {
+  printf("Form_Alert called.\n");
+  return 0;
+}
+
+void Unsupported_Handler(UNSUPPORT_INFO*, int type) {
+  std::string feature = "Unknown";
+  switch (type) {
+    case FPDF_UNSP_DOC_XFAFORM:
+      feature = "XFA";
+      break;
+    case FPDF_UNSP_DOC_PORTABLECOLLECTION:
+      feature = "Portfolios_Packages";
+      break;
+    case FPDF_UNSP_DOC_ATTACHMENT:
+    case FPDF_UNSP_ANNOT_ATTACHMENT:
+      feature = "Attachment";
+      break;
+    case FPDF_UNSP_DOC_SECURITY:
+      feature = "Rights_Management";
+      break;
+    case FPDF_UNSP_DOC_SHAREDREVIEW:
+      feature = "Shared_Review";
+      break;
+    case FPDF_UNSP_DOC_SHAREDFORM_ACROBAT:
+    case FPDF_UNSP_DOC_SHAREDFORM_FILESYSTEM:
+    case FPDF_UNSP_DOC_SHAREDFORM_EMAIL:
+      feature = "Shared_Form";
+      break;
+    case FPDF_UNSP_ANNOT_3DANNOT:
+      feature = "3D";
+      break;
+    case FPDF_UNSP_ANNOT_MOVIE:
+      feature = "Movie";
+      break;
+    case FPDF_UNSP_ANNOT_SOUND:
+      feature = "Sound";
+      break;
+    case FPDF_UNSP_ANNOT_SCREEN_MEDIA:
+    case FPDF_UNSP_ANNOT_SCREEN_RICHMEDIA:
+      feature = "Screen";
+      break;
+    case FPDF_UNSP_ANNOT_SIG:
+      feature = "Digital_Signature";
+      break;
+  }
+  printf("Unsupported feature: %s.\n", feature.c_str());
+}
+
+bool ParseCommandLine(int argc, const char* argv[], bool* write_images,
+                      std::list<const char*>* files) {
+  *write_images = false;
+  files->clear();
+
+  int cur_arg = 1;
+  if (cur_arg < argc &&
+      strcmp(argv[cur_arg], "--write_images") == 0) {
+    *write_images = true;
+    cur_arg++;
+  }
+
+  if (cur_arg >= argc)
+    return false;
+
+  for (int i = cur_arg; i < argc; i++)
+    files->push_back(argv[i]);
+
+  return true;
+}
+
+class TestLoader {
+ public:
+  TestLoader(const char* pBuf, size_t len);
+
+  const char* m_pBuf;
+  size_t m_Len;
+};
+
+TestLoader::TestLoader(const char* pBuf, size_t len)
+    : m_pBuf(pBuf), m_Len(len) {
+}
+
+int Get_Block(void* param, unsigned long pos, unsigned char* pBuf,
+              unsigned long size) {
+  TestLoader* pLoader = (TestLoader*) param;
+  if (pos + size < pos || pos + size > pLoader->m_Len) return 0;
+  memcpy(pBuf, pLoader->m_pBuf + pos, size);
+  return 1;
+}
+
+bool Is_Data_Avail(FX_FILEAVAIL* pThis, size_t offset, size_t size) {
+  return true;
+}
+
+void Add_Segment(FX_DOWNLOADHINTS* pThis, size_t offset, size_t size) {
+}
+
+void RenderPdf(const char* name, const char* pBuf, size_t len,
+               bool write_images) {
+  printf("Rendering PDF file %s.\n", name);
+
+  IPDF_JSPLATFORM platform_callbacks;
+  memset(&platform_callbacks, '\0', sizeof(platform_callbacks));
+  platform_callbacks.version = 1;
+  platform_callbacks.app_alert = Form_Alert;
+
+  FPDF_FORMFILLINFO form_callbacks;
+  memset(&form_callbacks, '\0', sizeof(form_callbacks));
+  form_callbacks.version = 1;
+  form_callbacks.m_pJsPlatform = &platform_callbacks;
+
+  TestLoader loader(pBuf, len);
+
+  FPDF_FILEACCESS file_access;
+  memset(&file_access, '\0', sizeof(file_access));
+  file_access.m_FileLen = len;
+  file_access.m_GetBlock = Get_Block;
+  file_access.m_Param = &loader;
+
+  FX_FILEAVAIL file_avail;
+  memset(&file_avail, '\0', sizeof(file_avail));
+  file_avail.version = 1;
+  file_avail.IsDataAvail = Is_Data_Avail;
+
+  FX_DOWNLOADHINTS hints;
+  memset(&hints, '\0', sizeof(hints));
+  hints.version = 1;
+  hints.AddSegment = Add_Segment;
+
+  FPDF_DOCUMENT doc;
+  FPDF_AVAIL pdf_avail = FPDFAvail_Create(&file_avail, &file_access);
+
+  (void) FPDFAvail_IsDocAvail(pdf_avail, &hints);
+
+  if (!FPDFAvail_IsLinearized(pdf_avail)) {
+    printf("Non-linearized path...\n");
+    doc = FPDF_LoadCustomDocument(&file_access, NULL);
+  } else {
+    printf("Linearized path...\n");
+    doc = FPDFAvail_GetDocument(pdf_avail, NULL);
+  }
+
+  (void) FPDF_GetDocPermissions(doc);
+  (void) FPDFAvail_IsFormAvail(pdf_avail, &hints);
+
+  FPDF_FORMHANDLE form = FPDFDOC_InitFormFillEnviroument(doc, &form_callbacks);
+  FPDF_SetFormFieldHighlightColor(form, 0, 0xFFE4DD);
+  FPDF_SetFormFieldHighlightAlpha(form, 100);
+
+  int first_page = FPDFAvail_GetFirstPageNum(doc);
+  (void) FPDFAvail_IsPageAvail(pdf_avail, first_page, &hints);
+
+  int page_count = FPDF_GetPageCount(doc);
+  for (int i = 0; i < page_count; ++i) {
+    (void) FPDFAvail_IsPageAvail(pdf_avail, i, &hints);
+  }
+
+  FORM_DoDocumentJSAction(form);
+  FORM_DoDocumentOpenAction(form);
+
+  for (int i = 0; i < page_count; ++i) {
+    FPDF_PAGE page = FPDF_LoadPage(doc, i);
+    FPDF_TEXTPAGE text_page = FPDFText_LoadPage(page);
+    FORM_OnAfterLoadPage(page, form);
+    FORM_DoPageAAction(page, form, FPDFPAGE_AACTION_OPEN);
+
+    int width = static_cast<int>(FPDF_GetPageWidth(page));
+    int height = static_cast<int>(FPDF_GetPageHeight(page));
+    FPDF_BITMAP bitmap = FPDFBitmap_Create(width, height, 0);
+    FPDFBitmap_FillRect(bitmap, 0, 0, width, height, 255, 255, 255, 255);
+
+    FPDF_RenderPageBitmap(bitmap, page, 0, 0, width, height, 0, 0);
+    FPDF_FFLDraw(form, bitmap, page, 0, 0, width, height, 0, 0);
+    if (write_images) {
+      const char* buffer = reinterpret_cast<const char*>(
+          FPDFBitmap_GetBuffer(bitmap));
+      int stride = FPDFBitmap_GetStride(bitmap);
+      write_file(name, i, buffer, stride, width, height);
+    }
+
+    FPDFBitmap_Destroy(bitmap);
+
+    FORM_DoPageAAction(page, form, FPDFPAGE_AACTION_CLOSE);
+    FORM_OnBeforeClosePage(page, form);
+    FPDFText_ClosePage(text_page);
+    FPDF_ClosePage(page);
+  }
+
+  FORM_DoDocumentAAction(form, FPDFDOC_AACTION_WC);
+  FPDFDOC_ExitFormFillEnviroument(form);
+  FPDF_CloseDocument(doc);
+  FPDFAvail_Destroy(pdf_avail);
+
+  printf("Loaded, parsed and rendered %d pages.\n", page_count);
+}
+
+int main(int argc, const char* argv[]) {
+  base::AtExitManager exit_manager;
+  base::i18n::InitializeICU();
+  bool write_images = false;
+  std::list<const char*> files;
+  if (!ParseCommandLine(argc, argv, &write_images, &files)) {
+    printf("Usage is: test [--write_images] /path/to/pdf\n");
+    printf("--write_images - to write page images <pdf-name>.<page-number>.ppm\n");
+    return 1;
+  }
+
+  FPDF_InitLibrary(NULL);
+
+  UNSUPPORT_INFO unsuppored_info;
+  memset(&unsuppored_info, '\0', sizeof(unsuppored_info));
+  unsuppored_info.version = 1;
+  unsuppored_info.FSDK_UnSupport_Handler = Unsupported_Handler;
+
+  FSDK_SetUnSpObjProcessHandler(&unsuppored_info);
+
+  while (!files.empty()) {
+    const char* filename = files.front();
+    files.pop_front();
+    FILE* file = fopen(filename, FOPEN_READ);
+    if (!file) {
+      fprintf(stderr, "Failed to open: %s\n", filename);
+      continue;
+    }
+    (void) fseek(file, 0, SEEK_END);
+    size_t len = ftell(file);
+    (void) fseek(file, 0, SEEK_SET);
+    char* pBuf = (char*) malloc(len);
+    size_t ret = fread(pBuf, 1, len, file);
+    (void) fclose(file);
+    if (ret != len) {
+      fprintf(stderr, "Failed to read: %s\n", filename);
+    } else {
+      RenderPdf(filename, pBuf, len, write_images);
+    }
+    free(pBuf);
+  }
+
+  FPDF_DestroyLibrary();
+
+  return 0;
+}
+

pdf/preview_mode_client.cc

@@ -0,0 +1,162 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/preview_mode_client.h"
+
+#include "base/logging.h"
+#include "pdf/instance.h"
+
+namespace chrome_pdf {
+
+PreviewModeClient::PreviewModeClient(Client* client)
+    : client_(client) {
+}
+
+void PreviewModeClient::DocumentSizeUpdated(const pp::Size& size) {
+}
+
+void PreviewModeClient::Invalidate(const pp::Rect& rect) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::Scroll(const pp::Point& point) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::ScrollToX(int position) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::ScrollToY(int position) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::ScrollToPage(int page) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::NavigateTo(const std::string& url,
+                                   bool open_in_new_tab) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::UpdateCursor(PP_CursorType_Dev cursor) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::UpdateTickMarks(
+    const std::vector<pp::Rect>& tickmarks) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::NotifyNumberOfFindResultsChanged(int total,
+                                                         bool final_result) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::NotifySelectedFindResultChanged(
+    int current_find_index) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::GetDocumentPassword(
+    pp::CompletionCallbackWithOutput<pp::Var> callback) {
+  callback.Run(PP_ERROR_FAILED);
+}
+
+void PreviewModeClient::Alert(const std::string& message) {
+  NOTREACHED();
+}
+
+bool PreviewModeClient::Confirm(const std::string& message) {
+  NOTREACHED();
+  return false;
+}
+
+std::string PreviewModeClient::Prompt(const std::string& question,
+                                      const std::string& default_answer) {
+  NOTREACHED();
+  return std::string();
+}
+
+std::string PreviewModeClient::GetURL() {
+  NOTREACHED();
+  return std::string();
+}
+
+void PreviewModeClient::Email(const std::string& to,
+                              const std::string& cc,
+                              const std::string& bcc,
+                              const std::string& subject,
+                              const std::string& body) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::Print() {
+  NOTREACHED();
+}
+
+void PreviewModeClient::SubmitForm(const std::string& url,
+                                   const void* data,
+                                   int length) {
+  NOTREACHED();
+}
+
+std::string PreviewModeClient::ShowFileSelectionDialog() {
+  NOTREACHED();
+  return std::string();
+}
+
+pp::URLLoader PreviewModeClient::CreateURLLoader() {
+  NOTREACHED();
+  return pp::URLLoader();
+}
+
+void PreviewModeClient::ScheduleCallback(int id, int delay_in_ms) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::SearchString(const base::char16* string,
+                                     const base::char16* term,
+                                     bool case_sensitive,
+                                     std::vector<SearchStringResult>* results) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::DocumentPaintOccurred() {
+  NOTREACHED();
+}
+
+void PreviewModeClient::DocumentLoadComplete(int page_count) {
+  client_->PreviewDocumentLoadComplete();
+}
+
+void PreviewModeClient::DocumentLoadFailed() {
+  client_->PreviewDocumentLoadFailed();
+}
+
+pp::Instance* PreviewModeClient::GetPluginInstance() {
+  NOTREACHED();
+  return NULL;
+}
+
+void PreviewModeClient::DocumentHasUnsupportedFeature(
+    const std::string& feature) {
+  NOTREACHED();
+}
+
+void PreviewModeClient::DocumentLoadProgress(uint32 available,
+                                             uint32 doc_size) {
+}
+
+void PreviewModeClient::FormTextFieldFocusChange(bool in_focus) {
+  NOTREACHED();
+}
+
+bool PreviewModeClient::IsPrintPreview() {
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace chrome_pdf

pdf/preview_mode_client.h

@@ -0,0 +1,77 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PREVIEW_MODE_CLIENT_H_
+#define PDF_PREVIEW_MODE_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "pdf/pdf_engine.h"
+
+namespace chrome_pdf {
+
+// The interface that's provided to the print preview rendering engine.
+class PreviewModeClient : public PDFEngine::Client {
+ public:
+  class Client {
+   public:
+    virtual void PreviewDocumentLoadFailed() = 0;
+    virtual void PreviewDocumentLoadComplete() = 0;
+  };
+  explicit PreviewModeClient(Client* client);
+  virtual ~PreviewModeClient() {}
+
+  // PDFEngine::Client implementation.
+  virtual void DocumentSizeUpdated(const pp::Size& size);
+  virtual void Invalidate(const pp::Rect& rect);
+  virtual void Scroll(const pp::Point& point);
+  virtual void ScrollToX(int position);
+  virtual void ScrollToY(int position);
+  virtual void ScrollToPage(int page);
+  virtual void NavigateTo(const std::string& url, bool open_in_new_tab);
+  virtual void UpdateCursor(PP_CursorType_Dev cursor);
+  virtual void UpdateTickMarks(const std::vector<pp::Rect>& tickmarks);
+  virtual void NotifyNumberOfFindResultsChanged(int total,
+                                                bool final_result);
+  virtual void NotifySelectedFindResultChanged(int current_find_index);
+  virtual void GetDocumentPassword(
+      pp::CompletionCallbackWithOutput<pp::Var> callback);
+  virtual void Alert(const std::string& message);
+  virtual bool Confirm(const std::string& message);
+  virtual std::string Prompt(const std::string& question,
+                             const std::string& default_answer);
+  virtual std::string GetURL();
+  virtual void Email(const std::string& to,
+                     const std::string& cc,
+                     const std::string& bcc,
+                     const std::string& subject,
+                     const std::string& body);
+  virtual void Print();
+  virtual void SubmitForm(const std::string& url,
+                          const void* data,
+                          int length);
+  virtual std::string ShowFileSelectionDialog();
+  virtual pp::URLLoader CreateURLLoader();
+  virtual void ScheduleCallback(int id, int delay_in_ms);
+  virtual void SearchString(const base::char16* string,
+                            const base::char16* term,
+                            bool case_sensitive,
+                            std::vector<SearchStringResult>* results);
+  virtual void DocumentPaintOccurred();
+  virtual void DocumentLoadComplete(int page_count);
+  virtual void DocumentLoadFailed();
+  virtual pp::Instance* GetPluginInstance();
+  virtual void DocumentHasUnsupportedFeature(const std::string& feature);
+  virtual void DocumentLoadProgress(uint32 available, uint32 doc_size);
+  virtual void FormTextFieldFocusChange(bool in_focus);
+  virtual bool IsPrintPreview();
+
+ private:
+  Client* client_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PREVIEW_MODE_CLIENT_H_

pdf/progress_control.cc

@@ -0,0 +1,283 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/progress_control.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+#include "pdf/draw_utils.h"
+#include "pdf/resource_consts.h"
+#include "ppapi/cpp/dev/font_dev.h"
+
+namespace chrome_pdf {
+
+const double ProgressControl::kCompleted = 100.0;
+
+// There is a bug outputting text with alpha 0xFF (opaque) to an intermediate
+// image. It outputs alpha channgel of the text pixels to 0xFF (transparent).
+// And it breaks next alpha blending.
+// For now, let's use alpha 0xFE to work around this bug.
+// TODO(gene): investigate this bug.
+const uint32 kProgressTextColor = 0xFEDDE6FC;
+const uint32 kProgressTextSize = 16;
+const uint32 kImageTextSpacing = 8;
+const uint32 kTopPadding = 8;
+const uint32 kBottomPadding = 12;
+const uint32 kLeftPadding = 10;
+const uint32 kRightPadding = 10;
+
+int ScaleInt(int val, float scale) {
+  return static_cast<int>(val * scale);
+}
+
+ProgressControl::ProgressControl()
+    : progress_(0.0),
+      device_scale_(1.0) {
+}
+
+ProgressControl::~ProgressControl() {
+}
+
+bool ProgressControl::CreateProgressControl(
+    uint32 id,
+    bool visible,
+    Control::Owner* delegate,
+    double progress,
+    float device_scale,
+    const std::vector<pp::ImageData>& images,
+    const pp::ImageData& background,
+    const std::string& text) {
+  progress_ = progress;
+  text_ = text;
+  bool res = Control::Create(id, pp::Rect(), visible, delegate);
+  if (res)
+    Reconfigure(background, images, device_scale);
+  return res;
+}
+
+void ProgressControl::Reconfigure(const pp::ImageData& background,
+                                  const std::vector<pp::ImageData>& images,
+                                  float device_scale) {
+  DCHECK(images.size() != 0);
+  images_ = images;
+  background_ = background;
+  device_scale_ = device_scale;
+  pp::Size ctrl_size;
+  CalculateLayout(owner()->GetInstance(), images_, background_, text_,
+      device_scale_, &ctrl_size, &image_rc_, &text_rc_);
+  pp::Rect rc(pp::Point(), ctrl_size);
+  Control::SetRect(rc, false);
+  PrepareBackground();
+}
+
+// static
+void ProgressControl::CalculateLayout(pp::Instance* instance,
+                                      const std::vector<pp::ImageData>& images,
+                                      const pp::ImageData& background,
+                                      const std::string& text,
+                                      float device_scale,
+                                      pp::Size* ctrl_size,
+                                      pp::Rect* image_rc,
+                                      pp::Rect* text_rc) {
+  DCHECK(images.size() != 0);
+  int image_width = 0;
+  int image_height = 0;
+  for (size_t i = 0; i < images.size(); i++) {
+    image_width = std::max(image_width, images[i].size().width());
+    image_height = std::max(image_height, images[i].size().height());
+  }
+
+  pp::FontDescription_Dev description;
+  description.set_family(PP_FONTFAMILY_SANSSERIF);
+  description.set_size(ScaleInt(kProgressTextSize, device_scale));
+  description.set_weight(PP_FONTWEIGHT_BOLD);
+  pp::Font_Dev font(instance, description);
+  int text_length = font.MeasureSimpleText(text);
+
+  pp::FontDescription_Dev desc;
+  PP_FontMetrics_Dev metrics;
+  font.Describe(&desc, &metrics);
+  int text_height = metrics.height;
+
+  *ctrl_size = pp::Size(
+      image_width + text_length +
+      ScaleInt(kImageTextSpacing + kLeftPadding + kRightPadding, device_scale),
+      std::max(image_height, text_height) +
+      ScaleInt(kTopPadding + kBottomPadding, device_scale));
+
+  int offset_x = 0;
+  int offset_y = 0;
+  if (ctrl_size->width() < background.size().width()) {
+    offset_x += (background.size().width() - ctrl_size->width()) / 2;
+    ctrl_size->set_width(background.size().width());
+  }
+  if (ctrl_size->height() < background.size().height()) {
+    offset_y += (background.size().height() - ctrl_size->height()) / 2;
+    ctrl_size->set_height(background.size().height());
+  }
+
+  *image_rc = pp::Rect(ScaleInt(kLeftPadding, device_scale) + offset_x,
+                       ScaleInt(kTopPadding, device_scale) + offset_y,
+                       image_width,
+                       image_height);
+
+  *text_rc = pp::Rect(
+      ctrl_size->width() - text_length -
+      ScaleInt(kRightPadding, device_scale) - offset_x,
+      (ctrl_size->height() - text_height) / 2,
+      text_length,
+      text_height);
+}
+
+size_t ProgressControl::GetImageIngex() const {
+  return static_cast<size_t>((progress_ / 100.0) * images_.size());
+}
+
+void ProgressControl::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
+  if (!visible())
+    return;
+
+  pp::Rect draw_rc = rect().Intersect(rc);
+  if (draw_rc.IsEmpty())
+    return;
+
+  pp::ImageData buffer(owner()->GetInstance(), ctrl_background_.format(),
+                       ctrl_background_.size(), false);
+  CopyImage(ctrl_background_, pp::Rect(ctrl_background_.size()),
+            &buffer, pp::Rect(ctrl_background_.size()), false);
+
+  size_t index = GetImageIngex();
+  if (index >= images_.size())
+    index = images_.size() - 1;
+
+  AlphaBlend(images_[index],
+             pp::Rect(images_[index].size()),
+             &buffer,
+             image_rc_.point(),
+             kOpaqueAlpha);
+
+  pp::Rect image_draw_rc(draw_rc);
+  image_draw_rc.Offset(-rect().x(), -rect().y());
+  AlphaBlend(buffer,
+             image_draw_rc,
+             image_data,
+             draw_rc.point(),
+             transparency());
+}
+
+void ProgressControl::SetProgress(double progress) {
+  size_t old_index = GetImageIngex();
+  progress_ = progress;
+  size_t new_index = GetImageIngex();
+  if (progress_ >= kCompleted) {
+    progress_ = kCompleted;
+    owner()->OnEvent(id(), EVENT_ID_PROGRESS_COMPLETED, NULL);
+  }
+  if (visible() && old_index != new_index)
+    owner()->Invalidate(id(), rect());
+}
+
+void ProgressControl::PrepareBackground() {
+  AdjustBackground();
+
+  pp::FontDescription_Dev description;
+  description.set_family(PP_FONTFAMILY_SANSSERIF);
+  description.set_size(ScaleInt(kProgressTextSize,  device_scale_));
+  description.set_weight(PP_FONTWEIGHT_BOLD);
+  pp::Font_Dev font(owner()->GetInstance(), description);
+
+  pp::FontDescription_Dev desc;
+  PP_FontMetrics_Dev metrics;
+  font.Describe(&desc, &metrics);
+
+  pp::Point text_origin = pp::Point(text_rc_.x(),
+      (text_rc_.y() + text_rc_.bottom() + metrics.x_height) / 2);
+  font.DrawTextAt(&ctrl_background_, pp::TextRun_Dev(text_), text_origin,
+      kProgressTextColor, pp::Rect(ctrl_background_.size()), false);
+}
+
+void ProgressControl::AdjustBackground() {
+  ctrl_background_ = pp::ImageData(owner()->GetInstance(),
+                                   PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+                                   rect().size(),
+                                   false);
+
+  if (rect().size() == background_.size()) {
+    CopyImage(background_, pp::Rect(background_.size()),
+        &ctrl_background_, pp::Rect(ctrl_background_.size()), false);
+    return;
+  }
+
+  // We need to stretch background to new dimentions. To do so, we split
+  // background into 9 different parts. We copy corner rects (1,3,7,9) as is,
+  // stretch rectangles between corners (2,4,6,8) in 1 dimention, and
+  // stretch center rect (5) in 2 dimentions.
+  //    |---|---|---|
+  //    | 1 | 2 | 3 |
+  //    |---|---|---|
+  //    | 4 | 5 | 6 |
+  //    |---|---|---|
+  //    | 7 | 8 | 9 |
+  //    |---|---|---|
+  int slice_x = background_.size().width() / 3;
+  int slice_y = background_.size().height() / 3;
+
+  // Copy rect 1
+  pp::Rect src_rc(0, 0, slice_x, slice_y);
+  pp::Rect dest_rc(0, 0, slice_x, slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
+
+  // Copy rect 3
+  src_rc.set_x(background_.size().width() - slice_x);
+  dest_rc.set_x(ctrl_background_.size().width() - slice_x);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
+
+  // Copy rect 9
+  src_rc.set_y(background_.size().height() - slice_y);
+  dest_rc.set_y(ctrl_background_.size().height() - slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
+
+  // Copy rect 7
+  src_rc.set_x(0);
+  dest_rc.set_x(0);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, false);
+
+  // Stretch rect 2
+  src_rc = pp::Rect(
+      slice_x, 0, background_.size().width() - 2 * slice_x, slice_y);
+  dest_rc = pp::Rect(
+      slice_x, 0, ctrl_background_.size().width() - 2 * slice_x, slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
+
+  // Copy rect 8
+  src_rc.set_y(background_.size().height() - slice_y);
+  dest_rc.set_y(ctrl_background_.size().height() - slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
+
+  // Stretch rect 4
+  src_rc = pp::Rect(
+      0, slice_y, slice_x, background_.size().height() - 2 * slice_y);
+  dest_rc = pp::Rect(
+      0, slice_y, slice_x, ctrl_background_.size().height() - 2 * slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
+
+  // Copy rect 6
+  src_rc.set_x(background_.size().width() - slice_x);
+  dest_rc.set_x(ctrl_background_.size().width() - slice_x);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
+
+  // Stretch rect 5
+  src_rc = pp::Rect(slice_x,
+                    slice_y,
+                    background_.size().width() - 2 * slice_x,
+                    background_.size().height() - 2 * slice_y);
+  dest_rc = pp::Rect(slice_x,
+                     slice_y,
+                     ctrl_background_.size().width() - 2 * slice_x,
+                     ctrl_background_.size().height() - 2 * slice_y);
+  CopyImage(background_, src_rc, &ctrl_background_, dest_rc, true);
+}
+
+}  // namespace chrome_pdf

pdf/progress_control.h

@@ -0,0 +1,72 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_PROGRESS_CONTROL_H_
+#define PDF_PROGRESS_CONTROL_H_
+
+#include <string>
+#include <vector>
+
+#include "pdf/control.h"
+#include "pdf/fading_control.h"
+#include "ppapi/cpp/image_data.h"
+
+namespace chrome_pdf {
+
+class ProgressControl : public FadingControl {
+ public:
+  static const double kCompleted;
+
+  enum ProgressEventIds {
+    EVENT_ID_PROGRESS_COMPLETED,
+  };
+
+  ProgressControl();
+  virtual ~ProgressControl();
+  virtual bool CreateProgressControl(uint32 id,
+                                     bool visible,
+                                     Control::Owner* delegate,
+                                     double progress,
+                                     float device_scale,
+                                     const std::vector<pp::ImageData>& images,
+                                     const pp::ImageData& background,
+                                     const std::string& text);
+  void Reconfigure(const pp::ImageData& background,
+                   const std::vector<pp::ImageData>& images,
+                   float device_scale);
+
+  static void CalculateLayout(pp::Instance* instance,
+                              const std::vector<pp::ImageData>& images,
+                              const pp::ImageData& background,
+                              const std::string& text,
+                              float device_scale,
+                              pp::Size* ctrl_size,
+                              pp::Rect* image_rc,
+                              pp::Rect* text_rc);
+
+  // Control interface.
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
+
+  // ProgressControl interface
+  // Set progress indicator in percents from 0% to 100%.
+  virtual void SetProgress(double progress);
+
+ private:
+  void PrepareBackground();
+  void AdjustBackground();
+  size_t GetImageIngex() const;
+
+  double progress_;
+  float device_scale_;
+  std::vector<pp::ImageData> images_;
+  pp::ImageData background_;
+  pp::ImageData ctrl_background_;
+  std::string text_;
+  pp::Rect image_rc_;
+  pp::Rect text_rc_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_PROGRESS_CONTROL_H_

pdf/resource.h

@@ -0,0 +1,14 @@
+//{{NO_DEPENDENCIES}}
+// Microsoft Visual C++ generated include file.
+// Used by pdf.rc
+
+// Next default values for new objects
+//
+#ifdef APSTUDIO_INVOKED
+#ifndef APSTUDIO_READONLY_SYMBOLS
+#define _APS_NEXT_RESOURCE_VALUE        101
+#define _APS_NEXT_COMMAND_VALUE         40001
+#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_SYMED_VALUE           101
+#endif
+#endif

pdf/resource_consts.h

@@ -0,0 +1,49 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_RESOURCE_RESOURCE_CONSTS_H_
+#define PDF_RESOURCE_RESOURCE_CONSTS_H_
+
+#include "base/basictypes.h"
+
+namespace chrome_pdf {
+
+const int kDragTimerMs = 50;
+const double kMinZoom = 0.1;
+const double kMaxZoom = 10.0;
+const double kZoomStep = 1.2;
+
+const uint32 kFadingTimeoutMs = 50;
+
+const uint32 kToolbarId = 10;
+const uint32 kThumbnailsId = 11;
+const uint32 kProgressBarId = 12;
+const uint32 kPageIndicatorId = 13;
+const uint32 kFitToPageButtonId = 100;
+const uint32 kFitToWidthButtonId = 101;
+const uint32 kZoomOutButtonId = 102;
+const uint32 kZoomInButtonId = 103;
+const uint32 kSaveButtonId = 104;
+const uint32 kPrintButtonId = 105;
+
+const uint32 kAutoScrollId = 200;
+
+// fading_rect.left = button_rect.left - kToolbarFadingOffsetLeft
+const int32 kToolbarFadingOffsetLeft = 40;
+// fading_rect.top = button_rect.top - kToolbarFadingOffsetTop
+const int32 kToolbarFadingOffsetTop = 40;
+// fading_rect.right = button_rect.right + kToolbarFadingOffsetRight
+const int32 kToolbarFadingOffsetRight = 10;
+// fading_rect.bottom = button_rect.bottom + kToolbarFadingOffsetBottom
+const int32 kToolbarFadingOffsetBottom = 8;
+
+const int32 kProgressOffsetLeft = 8;
+const int32 kProgressOffsetBottom = 8;
+
+// Width of the thumbnails control.
+const int32 kThumbnailsWidth = 196;
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_RESOURCE_RESOURCE_CONSTS_H_

pdf/thumbnail_control.cc

@@ -0,0 +1,301 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "pdf/thumbnail_control.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+#include "base/strings/string_util.h"
+#include "pdf/draw_utils.h"
+#include "pdf/number_image_generator.h"
+
+namespace chrome_pdf {
+
+const int kLeftBorderSize = 52;
+const int kBorderSize = 12;
+const int kHighlightBorderSize = 2;
+
+const uint32 kLeftColor = 0x003F537B;
+const uint32 kRightColor = 0x990D1626;
+
+const uint32 kTopHighlightColor = 0xFF426DC9;
+const uint32 kBottomHighlightColor = 0xFF6391DE;
+const uint32 kThumbnailBackgroundColor = 0xFF000000;
+
+const uint32 kSlidingTimeoutMs = 50;
+const int32 kSlidingShift = 50;
+
+const double kNonSelectedThumbnailAlpha = 0.91;
+
+ThumbnailControl::ThumbnailControl()
+    : engine_(NULL), sliding_width_(0), sliding_shift_(kSlidingShift),
+      sliding_timeout_(kSlidingTimeoutMs), sliding_timer_id_(0) {
+}
+
+ThumbnailControl::~ThumbnailControl() {
+  ClearCache();
+}
+
+bool ThumbnailControl::CreateThumbnailControl(
+    uint32 id, const pp::Rect& rc,
+    bool visible, Owner* owner, PDFEngine* engine,
+    NumberImageGenerator* number_image_generator) {
+  engine_ = engine;
+  number_image_generator_ = number_image_generator;
+  sliding_width_ = rc.width();
+
+  return Control::Create(id, rc, visible, owner);
+}
+
+void ThumbnailControl::SetPosition(int position, int total, bool invalidate) {
+  visible_rect_ = pp::Rect();
+  visible_pages_.clear();
+
+  if (rect().width() < kLeftBorderSize + kBorderSize) {
+    return;  // control is too narrow to show thumbnails.
+  }
+
+  int num_pages = engine_->GetNumberOfPages();
+
+  int max_doc_width = 0, total_doc_height = 0;
+  std::vector<pp::Rect> page_sizes(num_pages);
+  for (int i = 0; i < num_pages; ++i) {
+    page_sizes[i] = engine_->GetPageRect(i);
+    max_doc_width = std::max(max_doc_width, page_sizes[i].width());
+    total_doc_height += page_sizes[i].height();
+  }
+
+  if (!max_doc_width)
+    return;
+
+  int max_thumbnail_width = rect().width() - kLeftBorderSize - kBorderSize;
+  double thumbnail_ratio =
+      max_thumbnail_width / static_cast<double>(max_doc_width);
+
+  int total_thumbnail_height = 0;
+  for (int i = 0; i < num_pages; ++i) {
+    total_thumbnail_height += kBorderSize;
+    int thumbnail_width =
+        static_cast<int>(page_sizes[i].width() * thumbnail_ratio);
+    int thumbnail_height =
+        static_cast<int>(page_sizes[i].height() * thumbnail_ratio);
+    int x = (max_thumbnail_width - thumbnail_width) / 2;
+    page_sizes[i] =
+        pp::Rect(x, total_thumbnail_height, thumbnail_width, thumbnail_height);
+    total_thumbnail_height += thumbnail_height;
+  }
+  total_thumbnail_height += kBorderSize;
+
+  int visible_y = 0;
+  if (total > 0) {
+    double range = total_thumbnail_height - rect().height();
+    if (range < 0)
+      range = 0;
+    visible_y = static_cast<int>(range * position / total);
+  }
+  visible_rect_ = pp::Rect(0, visible_y, max_thumbnail_width, rect().height());
+
+  for (int i = 0; i < num_pages; ++i) {
+    if (page_sizes[i].Intersects(visible_rect_)) {
+      PageInfo page_info;
+      page_info.index = i;
+      page_info.rect = page_sizes[i];
+      page_info.rect.Offset(kLeftBorderSize, -visible_rect_.y());
+      visible_pages_.push_back(page_info);
+    }
+  }
+
+  if (invalidate)
+    owner()->Invalidate(id(), rect());
+}
+
+void ThumbnailControl::Show(bool visible, bool invalidate) {
+  if (!visible || invalidate)
+    ClearCache();
+  sliding_width_ = rect().width();
+  Control::Show(visible, invalidate);
+}
+
+void ThumbnailControl::SlideIn() {
+  if (visible())
+    return;
+
+  Show(true, false);
+  sliding_width_ = 0;
+  sliding_shift_ = kSlidingShift;
+
+  sliding_timer_id_ = owner()->ScheduleTimer(id(), sliding_timeout_);
+  owner()->Invalidate(id(), rect());
+}
+
+void ThumbnailControl::SlideOut() {
+  if (!visible())
+    return;
+  sliding_shift_ = -kSlidingShift;
+  sliding_timer_id_ = owner()->ScheduleTimer(id(), sliding_timeout_);
+}
+
+void ThumbnailControl::Paint(pp::ImageData* image_data, const pp::Rect& rc) {
+  if (!visible())
+    return;
+
+  pp::Rect control_rc(rect());
+  control_rc.Offset(control_rc.width() - sliding_width_, 0);
+  control_rc.set_width(sliding_width_);
+
+  pp::Rect draw_rc = rc.Intersect(control_rc);
+  if (draw_rc.IsEmpty())
+    return;
+
+  pp::Rect gradient_rc(control_rc.x(), draw_rc.y(),
+                       control_rc.width(), draw_rc.height());
+  GradientFill(owner()->GetInstance(),
+               image_data,
+               draw_rc,
+               gradient_rc,
+               kLeftColor,
+               kRightColor,
+               true,
+               transparency());
+
+  int selected_page = engine_->GetMostVisiblePage();
+  for (size_t i = 0; i < visible_pages_.size(); ++i) {
+    pp::Rect page_rc = visible_pages_[i].rect;
+    page_rc.Offset(control_rc.point());
+
+    if (visible_pages_[i].index == selected_page) {
+      pp::Rect highlight_rc = page_rc;
+      highlight_rc.Inset(-kHighlightBorderSize, -kHighlightBorderSize);
+      GradientFill(owner()->GetInstance(),
+                   image_data,
+                   draw_rc,
+                   highlight_rc,
+                   kTopHighlightColor,
+                   kBottomHighlightColor,
+                   false,
+                   transparency());
+    }
+
+    pp::Rect draw_page_rc = page_rc.Intersect(draw_rc);
+    if (draw_page_rc.IsEmpty())
+      continue;
+
+    // First search page image in the cache.
+    pp::ImageData* thumbnail = NULL;
+    std::map<int, pp::ImageData*>::iterator it =
+        image_cache_.find(visible_pages_[i].index);
+    if (it != image_cache_.end()) {
+      if (it->second->size() == page_rc.size())
+        thumbnail = image_cache_[visible_pages_[i].index];
+      else
+        image_cache_.erase(it);
+    }
+
+    // If page is not found in the cache, create new one.
+    if (thumbnail == NULL) {
+      thumbnail = new pp::ImageData(owner()->GetInstance(),
+                                    PP_IMAGEDATAFORMAT_BGRA_PREMUL,
+                                    page_rc.size(),
+                                    false);
+      engine_->PaintThumbnail(thumbnail, visible_pages_[i].index);
+
+      pp::ImageData page_number;
+      number_image_generator_->GenerateImage(
+          visible_pages_[i].index + 1, &page_number);
+      pp::Point origin(
+          (thumbnail->size().width() - page_number.size().width()) / 2,
+          (thumbnail->size().height() - page_number.size().height()) / 2);
+
+      if (origin.x() > 0 && origin.y() > 0) {
+        AlphaBlend(page_number, pp::Rect(pp::Point(), page_number.size()),
+                   thumbnail, origin, kOpaqueAlpha);
+      }
+
+      image_cache_[visible_pages_[i].index] = thumbnail;
+    }
+
+    uint8 alpha = transparency();
+    if (visible_pages_[i].index != selected_page)
+      alpha = static_cast<uint8>(alpha * kNonSelectedThumbnailAlpha);
+    FillRect(image_data, draw_page_rc, kThumbnailBackgroundColor);
+    draw_page_rc.Offset(-page_rc.x(), -page_rc.y());
+    AlphaBlend(*thumbnail, draw_page_rc, image_data,
+        draw_page_rc.point() + page_rc.point(), alpha);
+  }
+}
+
+bool ThumbnailControl::HandleEvent(const pp::InputEvent& event) {
+  if (!visible())
+    return false;
+
+  pp::MouseInputEvent mouse_event(event);
+  if (mouse_event.is_null())
+    return false;
+  pp::Point pt = mouse_event.GetPosition();
+  if (!rect().Contains(pt))
+    return false;
+
+  int over_page = -1;
+  for (size_t i = 0; i < visible_pages_.size(); ++i) {
+    pp::Rect page_rc = visible_pages_[i].rect;
+    page_rc.Offset(rect().point());
+    if (page_rc.Contains(pt)) {
+      over_page = i;
+      break;
+    }
+  }
+
+  bool handled = false;
+  switch (event.GetType()) {
+    case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+      owner()->SetCursor(id(),
+          over_page == -1 ? PP_CURSORTYPE_POINTER : PP_CURSORTYPE_HAND);
+      break;
+    case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+      if (over_page != -1) {
+        owner()->Invalidate(id(), rect());
+        owner()->OnEvent(id(), EVENT_ID_THUMBNAIL_SELECTED,
+                         &visible_pages_[over_page].index);
+      }
+      handled = true;
+      break;
+    default:
+      break;
+  }
+
+  return handled;
+}
+
+void ThumbnailControl::OnTimerFired(uint32 timer_id) {
+  if (timer_id == sliding_timer_id_) {
+    sliding_width_ += sliding_shift_;
+    if (sliding_width_ <= 0) {
+      // We completely slided out. Make control invisible now.
+      Show(false, false);
+    } else if (sliding_width_ >= rect().width()) {
+      // We completely slided in. Make sliding width to full control width.
+      sliding_width_ = rect().width();
+    } else {
+      // We have not completed sliding yet. Keep sliding.
+      sliding_timer_id_ = owner()->ScheduleTimer(id(), sliding_timeout_);
+    }
+    owner()->Invalidate(id(), rect());
+  }
+}
+
+void ThumbnailControl::ResetEngine(PDFEngine* engine) {
+  engine_ = engine;
+  ClearCache();
+}
+
+void ThumbnailControl::ClearCache() {
+  std::map<int, pp::ImageData*>::iterator it;
+  for (it = image_cache_.begin(); it != image_cache_.end(); ++it) {
+    delete it->second;
+  }
+  image_cache_.clear();
+}
+
+}  // namespace chrome_pdf

pdf/thumbnail_control.h

@@ -0,0 +1,67 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PDF_THUMBNAIL_CONTROL_H_
+#define PDF_THUMBNAIL_CONTROL_H_
+
+#include <map>
+#include <vector>
+
+#include "pdf/control.h"
+#include "pdf/pdf_engine.h"
+#include "ppapi/cpp/input_event.h"
+
+namespace chrome_pdf {
+
+class NumberImageGenerator;
+
+class ThumbnailControl : public Control {
+ public:
+  enum ThumbnailEventIds {
+    EVENT_ID_THUMBNAIL_SELECTED = 100,
+  };
+
+  explicit ThumbnailControl();
+  virtual ~ThumbnailControl();
+
+  // Sets current position of the thumnail control.
+  void SetPosition(int position, int total, bool invalidate);
+  void SlideIn();
+  void SlideOut();
+
+  virtual bool CreateThumbnailControl(
+      uint32 id, const pp::Rect& rc,
+      bool visible, Owner* owner, PDFEngine* engine,
+      NumberImageGenerator* number_image_generator);
+
+  // Control interface.
+  virtual void Show(bool visible, bool invalidate);
+  virtual void Paint(pp::ImageData* image_data, const pp::Rect& rc);
+  virtual bool HandleEvent(const pp::InputEvent& event);
+  virtual void OnTimerFired(uint32 timer_id);
+
+  virtual void ResetEngine(PDFEngine* engine);
+
+ private:
+  void ClearCache();
+
+  struct PageInfo {
+    int index;
+    pp::Rect rect;
+  };
+
+  PDFEngine* engine_;
+  pp::Rect visible_rect_;
+  std::vector<PageInfo> visible_pages_;
+  std::map<int, pp::ImageData*> image_cache_;
+  int sliding_width_;
+  int sliding_shift_;
+  int sliding_timeout_;
+  uint32 sliding_timer_id_;
+  NumberImageGenerator* number_image_generator_;
+};
+
+}  // namespace chrome_pdf
+
+#endif  // PDF_THUMBNAIL_CONTROL_H_