Pepper/Flapper: Add very basic clipboard support.

Note that this is a trusted private interface; we rely on Flash to do a user
action check.

BUG=none
TEST=Trung can cut-and-paste in his Flapper

Review URL: http://codereview.chromium.org/6611034

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76857 0039d316-1c4b-4281-b951-d872f2087c98

ppapi/c/private/ppb_flash_clipboard.h

@@ -0,0 +1,33 @@
+// 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 PPAPI_C_PRIVATE_PPB_FLASH_CLIPBOARD_H_
+#define PPAPI_C_PRIVATE_PPB_FLASH_CLIPBOARD_H_
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_var.h"
+
+#define PPB_FLASH_CLIPBOARD_INTERFACE "PPB_Flash_Clipboard;2"
+
+typedef enum {
+  PP_FLASH_CLIPBOARD_TYPE_STANDARD = 0,
+  PP_FLASH_CLIPBOARD_TYPE_SELECTION = 1,
+  PP_FLASH_CLIPBOARD_TYPE_DRAG = 2
+} PP_Flash_Clipboard_Type;
+
+struct PPB_Flash_Clipboard {
+  // Reads plain text data from the clipboard.
+  struct PP_Var (*ReadPlainText)(PP_Instance instance_id,
+                                 PP_Flash_Clipboard_Type clipboard_type);
+
+  // Writes plain text data to the clipboard. If |text| is too large, it will
+  // return |PP_ERROR_NOSPACE| (and not write to the clipboard).
+  int32_t (*WritePlainText)(PP_Instance instance_id,
+                            PP_Flash_Clipboard_Type clipboard_type,
+                            struct PP_Var text);
+
+  // TODO(vtl): More formats, a |IsFormatAvailable()|, ....
+};
+
+#endif  // PPAPI_C_PRIVATE_PPB_FLASH_CLIPBOARD_H_

ppapi/c/private/ppb_flash_menu.h

@@ -10,8 +10,6 @@
 #include "ppapi/c/pp_point.h"
 #include "ppapi/c/pp_resource.h"
 
-// PPB_Flash -------------------------------------------------------------------
-
 #define PPB_FLASH_MENU_INTERFACE "PPB_Flash_Menu;1"
 
 struct PP_CompletionCallback;

ppapi/ppapi_cpp.gypi

@@ -82,6 +82,8 @@
 
         # Private interfaces.
         'c/private/ppb_flash.h',
+        'c/private/ppb_flash_clipboard.h',
+        'c/private/ppb_flash_file.h',
         'c/private/ppb_flash_menu.h',
         'c/private/ppb_flash_net_connector.h',
         'c/private/ppb_nacl_private.h',

webkit/glue/webkit_glue.gypi

@@ -297,6 +297,8 @@
         '../plugins/ppapi/ppb_file_ref_impl.h',
         '../plugins/ppapi/ppb_file_system_impl.cc',
         '../plugins/ppapi/ppb_file_system_impl.h',
+        '../plugins/ppapi/ppb_flash_clipboard_impl.cc',
+        '../plugins/ppapi/ppb_flash_clipboard_impl.h',
         '../plugins/ppapi/ppb_flash_file_impl.cc',
         '../plugins/ppapi/ppb_flash_file_impl.h',
         '../plugins/ppapi/ppb_flash_impl.cc',

webkit/plugins/ppapi/plugin_module.cc

@@ -50,6 +50,7 @@
 #include "ppapi/c/ppp.h"
 #include "ppapi/c/ppp_instance.h"
 #include "ppapi/c/private/ppb_flash.h"
+#include "ppapi/c/private/ppb_flash_clipboard.h"
 #include "ppapi/c/private/ppb_flash_file.h"
 #include "ppapi/c/private/ppb_flash_menu.h"
 #include "ppapi/c/private/ppb_flash_net_connector.h"
@@ -70,6 +71,7 @@
 #include "webkit/plugins/ppapi/ppb_file_io_impl.h"
 #include "webkit/plugins/ppapi/ppb_file_ref_impl.h"
 #include "webkit/plugins/ppapi/ppb_file_system_impl.h"
+#include "webkit/plugins/ppapi/ppb_flash_clipboard_impl.h"
 #include "webkit/plugins/ppapi/ppb_flash_file_impl.h"
 #include "webkit/plugins/ppapi/ppb_flash_impl.h"
 #include "webkit/plugins/ppapi/ppb_flash_menu_impl.h"
@@ -250,6 +252,8 @@ const void* GetInterface(const char* name) {
     return PluginInstance::GetFindInterface();
   if (strcmp(name, PPB_FLASH_INTERFACE) == 0)
     return PPB_Flash_Impl::GetInterface();
+  if (strcmp(name, PPB_FLASH_CLIPBOARD_INTERFACE) == 0)
+    return PPB_Flash_Clipboard_Impl::GetInterface();
   if (strcmp(name, PPB_FLASH_FILE_FILEREF_INTERFACE) == 0)
     return PPB_Flash_File_FileRef_Impl::GetInterface();
   if (strcmp(name, PPB_FLASH_FILE_MODULELOCAL_INTERFACE) == 0)

webkit/plugins/ppapi/ppb_flash_clipboard_impl.cc

@@ -0,0 +1,102 @@
+// 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 "webkit/plugins/ppapi/ppb_flash_clipboard_impl.h"
+
+#include <algorithm>
+#include <string>
+
+#include "base/logging.h"
+#include "base/ref_counted.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash_clipboard.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebClipboard.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebCString.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebKit.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebKitClient.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebString.h"
+#include "webkit/plugins/ppapi/ppapi_plugin_instance.h"
+#include "webkit/plugins/ppapi/resource_tracker.h"
+#include "webkit/plugins/ppapi/var.h"
+
+namespace webkit {
+namespace ppapi {
+
+namespace {
+
+const size_t kMaxClipboardWriteSize = 1000000;
+
+WebKit::WebClipboard::Buffer ConvertClipboardType(
+    PP_Flash_Clipboard_Type type) {
+  switch (type) {
+    case PP_FLASH_CLIPBOARD_TYPE_STANDARD:
+      return WebKit::WebClipboard::BufferStandard;
+    case PP_FLASH_CLIPBOARD_TYPE_SELECTION:
+      return WebKit::WebClipboard::BufferSelection;
+    case PP_FLASH_CLIPBOARD_TYPE_DRAG:
+      return WebKit::WebClipboard::BufferDrag;
+    default:
+      NOTREACHED();
+      return WebKit::WebClipboard::BufferStandard;
+  }
+}
+
+PP_Var ReadPlainText(PP_Instance instance_id,
+                     PP_Flash_Clipboard_Type clipboard_type) {
+  PluginInstance* instance = ResourceTracker::Get()->GetInstance(instance_id);
+  if (!instance)
+    return PP_MakeNull();
+
+  WebKit::WebClipboard* web_clipboard = WebKit::webKitClient()->clipboard();
+  if (!web_clipboard) {
+    NOTREACHED();
+    return PP_MakeNull();
+  }
+
+  WebKit::WebCString s =
+      web_clipboard->readPlainText(ConvertClipboardType(clipboard_type)).utf8();
+  return StringVar::StringToPPVar(instance->module(), s);
+}
+
+int32_t WritePlainText(PP_Instance instance_id,
+                       PP_Flash_Clipboard_Type clipboard_type,
+                       PP_Var text) {
+  scoped_refptr<StringVar> text_string(StringVar::FromPPVar(text));
+  if (!text_string)
+    return PP_ERROR_BADARGUMENT;
+
+  if (text_string->value().length() > kMaxClipboardWriteSize)
+    return PP_ERROR_NOSPACE;
+
+  if (clipboard_type != PP_FLASH_CLIPBOARD_TYPE_STANDARD) {
+    NOTIMPLEMENTED();
+    return PP_ERROR_FAILED;
+  }
+
+  WebKit::WebClipboard* web_clipboard = WebKit::webKitClient()->clipboard();
+  if (!web_clipboard) {
+    NOTREACHED();
+    return PP_ERROR_FAILED;
+  }
+
+  web_clipboard->writePlainText(
+      WebKit::WebCString(text_string->value()).utf16());
+  return PP_OK;
+}
+
+const PPB_Flash_Clipboard ppb_flash_clipboard = {
+  &ReadPlainText,
+  &WritePlainText,
+};
+
+}  // namespace
+
+// static
+const PPB_Flash_Clipboard*
+    PPB_Flash_Clipboard_Impl::GetInterface() {
+  return &ppb_flash_clipboard;
+}
+
+}  // namespace ppapi
+}  // namespace webkit

webkit/plugins/ppapi/ppb_flash_clipboard_impl.h

@@ -0,0 +1,21 @@
+// 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 WEBKIT_PLUGINS_PPAPI_PPB_FLASH_CLIPBOARD_IMPL_H_
+#define WEBKIT_PLUGINS_PPAPI_PPB_FLASH_CLIPBOARD_IMPL_H_
+
+struct PPB_Flash_Clipboard;
+
+namespace webkit {
+namespace ppapi {
+
+class PPB_Flash_Clipboard_Impl {
+ public:
+  static const PPB_Flash_Clipboard* GetInterface();
+};
+
+}  // namespace ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_PLUGINS_PPAPI_PPB_FLASH_CLIPBOARD_IMPL_H_