Move PDF transform code from printing/ to pdf/

When the code was written, pdf_unittests did not exist, so the code
ended up in printing/ since printing_unittests existed, and the code is
used for printing PDFs.

Change-Id: I31e01524904da6ded6dffa22f80d7c68580c58a9
Reviewed-on: https://chromium-review.googlesource.com/938852
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540926}

pdf/BUILD.gn

@@ -52,6 +52,8 @@ if (enable_pdf) {
       "pdf_engine.h",
       "pdf_ppapi.cc",
       "pdf_ppapi.h",
+      "pdf_transform.cc",
+      "pdf_transform.h",
       "preview_mode_client.cc",
       "preview_mode_client.h",
       "range_set.cc",
@@ -102,6 +104,7 @@ if (enable_pdf) {
     sources = [
       "chunk_stream_unittest.cc",
       "document_loader_unittest.cc",
+      "pdf_transform_unittest.cc",
       "range_set_unittest.cc",
       "run_all_unittests.cc",
     ]

pdf/DEPS

@@ -2,9 +2,11 @@ include_rules = [
   "+chrome/common/content_restriction.h",
   "+net",
   "+ppapi",
+  "+printing/units.h",
   "+ui/base/window_open_disposition.h",
   "+ui/events/keycodes/keyboard_codes.h",
   "+ui/gfx/geometry/point_f.h",
+  "+ui/gfx/geometry/rect.h",
   "+ui/gfx/range/range.h",
   "+v8/include/v8.h"
 ]

pdf/pdf_transform.cc

@@ -2,14 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "printing/pdf_transform.h"
+#include "pdf/pdf_transform.h"
 
 #include <algorithm>
+#include <utility>
 
 #include "base/logging.h"
 #include "ui/gfx/geometry/rect.h"
 
-namespace printing {
+namespace chrome_pdf {
 
 namespace {
 
@@ -33,10 +34,10 @@ double CalculateScaleFactor(const gfx::Rect& content_rect,
 
   double actual_source_page_width = rotated ? src_height : src_width;
   double actual_source_page_height = rotated ? src_width : src_height;
-  double ratio_x = static_cast<double>(content_rect.width()) /
-                   actual_source_page_width;
-  double ratio_y = static_cast<double>(content_rect.height()) /
-                   actual_source_page_height;
+  double ratio_x =
+      static_cast<double>(content_rect.width()) / actual_source_page_width;
+  double ratio_y =
+      static_cast<double>(content_rect.height()) / actual_source_page_height;
   return std::min(ratio_x, ratio_y);
 }
 
@@ -135,4 +136,4 @@ void CalculateNonScaledClipBoxOffset(const gfx::Rect& content_rect,
   }
 }
 
-}  // namespace printing
+}  // namespace chrome_pdf

pdf/pdf_transform.h

@@ -2,20 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef PRINTING_PDF_TRANSFORM_H_
-#define PRINTING_PDF_TRANSFORM_H_
-
-#include "printing/printing_export.h"
+#ifndef PDF_PDF_TRANSFORM_H_
+#define PDF_PDF_TRANSFORM_H_
 
 namespace gfx {
 class Rect;
 }
 
-namespace printing {
+namespace chrome_pdf {
 
 // A rect struct for use with FPDF bounding box functions.
 // With PDFs, origin is bottom-left.
-struct PRINTING_EXPORT PdfRectangle {
+struct PdfRectangle {
   float left;
   float bottom;
   float right;
@@ -30,25 +28,25 @@ struct PRINTING_EXPORT PdfRectangle {
 // |src_width| specifies the source page width in points.
 // |src_height| specifies the source page height in points.
 // |rotated| True if source page is rotated 90 degree or 270 degree.
-PRINTING_EXPORT double CalculateScaleFactor(const gfx::Rect& content_rect,
-                                            double src_width,
-                                            double src_height,
-                                            bool rotated);
+double CalculateScaleFactor(const gfx::Rect& content_rect,
+                            double src_width,
+                            double src_height,
+                            bool rotated);
 
 // Make the default size to be letter size (8.5" X 11"). We are just following
 // the PDFium way of handling these corner cases. PDFium always consider
 // US-Letter as the default page size.
-PRINTING_EXPORT void SetDefaultClipBox(bool rotated, PdfRectangle* clip_box);
+void SetDefaultClipBox(bool rotated, PdfRectangle* clip_box);
 
 // Set the media box and/or crop box as needed. If both boxes are there, then
 // nothing needs to be done. If one box is missing, then fill it with the value
 // from the other box. If both boxes are missing, then they both get the default
 // value from SetDefaultClipBox(), based on |rotated|.
-PRINTING_EXPORT void CalculateMediaBoxAndCropBox(bool rotated,
-                                                 bool has_media_box,
-                                                 bool has_crop_box,
-                                                 PdfRectangle* media_box,
-                                                 PdfRectangle* crop_box);
+void CalculateMediaBoxAndCropBox(bool rotated,
+                                 bool has_media_box,
+                                 bool has_crop_box,
+                                 PdfRectangle* media_box,
+                                 PdfRectangle* crop_box);
 
 // Compute source clip box boundaries based on the crop box / media box of
 // source page and scale factor.
@@ -56,12 +54,11 @@ PRINTING_EXPORT void CalculateMediaBoxAndCropBox(bool rotated,
 //
 // |media_box| The PDF's media box.
 // |crop_box| The PDF's crop box.
-PRINTING_EXPORT PdfRectangle CalculateClipBoxBoundary(
-    const PdfRectangle& media_box,
-    const PdfRectangle& crop_box);
+PdfRectangle CalculateClipBoxBoundary(const PdfRectangle& media_box,
+                                      const PdfRectangle& crop_box);
 
 // Scale |box| by |scale_factor|.
-PRINTING_EXPORT void ScalePdfRectangle(double scale_factor, PdfRectangle* rect);
+void ScalePdfRectangle(double scale_factor, PdfRectangle* rect);
 
 // Calculate the clip box translation offset for a page that does need to be
 // scaled. All parameters are in points.
@@ -72,11 +69,10 @@ PRINTING_EXPORT void ScalePdfRectangle(double scale_factor, PdfRectangle* rect);
 // origin at left-bottom.
 // |offset_x| and |offset_y| will contain the final translation offsets for the
 // source clip box, relative to origin at left-bottom.
-PRINTING_EXPORT void CalculateScaledClipBoxOffset(
-    const gfx::Rect& content_rect,
-    const PdfRectangle& source_clip_box,
-    double* offset_x,
-    double* offset_y);
+void CalculateScaledClipBoxOffset(const gfx::Rect& content_rect,
+                                  const PdfRectangle& source_clip_box,
+                                  double* offset_x,
+                                  double* offset_y);
 
 // Calculate the clip box offset for a page that does not need to be scaled.
 // All parameters are in points.
@@ -91,15 +87,14 @@ PRINTING_EXPORT void CalculateScaledClipBoxOffset(
 // at left-bottom.
 // |offset_x| and |offset_y| will contain the final translation offsets for the
 // source clip box, relative to origin at left-bottom.
-PRINTING_EXPORT void CalculateNonScaledClipBoxOffset(
-    const gfx::Rect& content_rect,
-    int rotation,
-    int page_width,
-    int page_height,
-    const PdfRectangle& source_clip_box,
-    double* offset_x,
-    double* offset_y);
+void CalculateNonScaledClipBoxOffset(const gfx::Rect& content_rect,
+                                     int rotation,
+                                     int page_width,
+                                     int page_height,
+                                     const PdfRectangle& source_clip_box,
+                                     double* offset_x,
+                                     double* offset_y);
 
-}  // namespace printing
+}  // namespace chrome_pdf
 
-#endif  // PRINTING_PDF_TRANSFORM_H_
+#endif  // PDF_PDF_TRANSFORM_H_

pdf/pdf_transform_unittest.cc

@@ -2,18 +2,18 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "printing/pdf_transform.h"
+#include "pdf/pdf_transform.h"
 
 #include "printing/units.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/rect.h"
 
-namespace printing {
+namespace chrome_pdf {
 
 namespace {
 
-const float kDefaultWidth = 8.5 * kPointsPerInch;
-const float kDefaultHeight = 11.0 * kPointsPerInch;
+const float kDefaultWidth = 8.5 * printing::kPointsPerInch;
+const float kDefaultHeight = 11.0 * printing::kPointsPerInch;
 const float kDefaultRatio = kDefaultWidth / kDefaultHeight;
 const double kTolerance = 0.0001;
 
@@ -217,40 +217,40 @@ TEST(PdfTransformTest, CalculateNonScaledClipBoxOffset) {
 
   // |rect|, page size and |clip_box| are the same.
   InitializeBoxToDefaultPortraitValues(&clip_box);
-  CalculateNonScaledClipBoxOffset(
-      rect, 0, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 0, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 1, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 1, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 2, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 2, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 3, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 3, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(180, offset_x);
   EXPECT_DOUBLE_EQ(-180, offset_y);
 
   // Smaller |clip_box|.
   clip_box.top /= 4;
   clip_box.right /= 2;
-  CalculateNonScaledClipBoxOffset(
-      rect, 0, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 0, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(594, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 1, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 1, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 2, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 2, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(306, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 3, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 3, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(486, offset_x);
   EXPECT_DOUBLE_EQ(414, offset_y);
 
@@ -258,20 +258,20 @@ TEST(PdfTransformTest, CalculateNonScaledClipBoxOffset) {
   InitializeBoxToDefaultPortraitValues(&clip_box);
   page_width += 10;
   page_height += 20;
-  CalculateNonScaledClipBoxOffset(
-      rect, 0, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 0, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(20, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 1, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 1, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(0, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 2, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 2, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(10, offset_x);
   EXPECT_DOUBLE_EQ(0, offset_y);
-  CalculateNonScaledClipBoxOffset(
-      rect, 3, page_width, page_height, clip_box, &offset_x, &offset_y);
+  CalculateNonScaledClipBoxOffset(rect, 3, page_width, page_height, clip_box,
+                                  &offset_x, &offset_y);
   EXPECT_DOUBLE_EQ(200, offset_x);
   EXPECT_DOUBLE_EQ(-170, offset_y);
 }
@@ -332,4 +332,4 @@ TEST(PdfTransformTest, ReversedMediaBox) {
   EXPECT_DOUBLE_EQ(0, offset_y);
 }
 
-}  // namespace printing
+}  // namespace chrome_pdf

pdf/pdfium/DEPS

@@ -1,9 +1,6 @@
 include_rules = [
   "+gin/array_buffer.h",
   "+gin/public",
-  "+printing/pdf_transform.h",
-  "+printing/units.h",
   "+third_party/pdfium/public",
   "+ui/gfx/codec/jpeg_codec.h",
-  "+ui/gfx/geometry/rect.h",
 ]

pdf/pdfium/pdfium_engine.cc

@@ -31,6 +31,7 @@
 #include "gin/public/gin_embedders.h"
 #include "gin/public/isolate_holder.h"
 #include "pdf/draw_utils.h"
+#include "pdf/pdf_transform.h"
 #include "pdf/pdfium/pdfium_api_string_buffer_adapter.h"
 #include "pdf/pdfium/pdfium_mem_buffer_file_read.h"
 #include "pdf/pdfium/pdfium_mem_buffer_file_write.h"
@@ -48,7 +49,6 @@
 #include "ppapi/cpp/url_response_info.h"
 #include "ppapi/cpp/var.h"
 #include "ppapi/cpp/var_dictionary.h"
-#include "printing/pdf_transform.h"
 #include "printing/units.h"
 #include "third_party/pdfium/public/cpp/fpdf_deleters.h"
 #include "third_party/pdfium/public/fpdf_annot.h"
@@ -3792,35 +3792,33 @@ void PDFiumEngine::TransformPDFPageForPrinting(
   const gfx::Rect gfx_content_rect(content_rect.x(), content_rect.y(),
                                    content_rect.width(), content_rect.height());
   const double scale_factor =
-      fit_to_page
-          ? printing::CalculateScaleFactor(gfx_content_rect, src_page_width,
-                                           src_page_height, rotated)
-          : 1.0;
+      fit_to_page ? CalculateScaleFactor(gfx_content_rect, src_page_width,
+                                         src_page_height, rotated)
+                  : 1.0;
 
   // Calculate positions for the clip box.
-  printing::PdfRectangle media_box;
-  printing::PdfRectangle crop_box;
+  PdfRectangle media_box;
+  PdfRectangle crop_box;
   bool has_media_box =
       !!FPDFPage_GetMediaBox(page, &media_box.left, &media_box.bottom,
                              &media_box.right, &media_box.top);
   bool has_crop_box = !!FPDFPage_GetCropBox(
       page, &crop_box.left, &crop_box.bottom, &crop_box.right, &crop_box.top);
-  printing::CalculateMediaBoxAndCropBox(rotated, has_media_box, has_crop_box,
-                                        &media_box, &crop_box);
-  printing::PdfRectangle source_clip_box =
-      printing::CalculateClipBoxBoundary(media_box, crop_box);
-  printing::ScalePdfRectangle(scale_factor, &source_clip_box);
+  CalculateMediaBoxAndCropBox(rotated, has_media_box, has_crop_box, &media_box,
+                              &crop_box);
+  PdfRectangle source_clip_box = CalculateClipBoxBoundary(media_box, crop_box);
+  ScalePdfRectangle(scale_factor, &source_clip_box);
 
   // Calculate the translation offset values.
   double offset_x = 0;
   double offset_y = 0;
   if (fit_to_page) {
-    printing::CalculateScaledClipBoxOffset(gfx_content_rect, source_clip_box,
-                                           &offset_x, &offset_y);
+    CalculateScaledClipBoxOffset(gfx_content_rect, source_clip_box, &offset_x,
+                                 &offset_y);
   } else {
-    printing::CalculateNonScaledClipBoxOffset(
-        gfx_content_rect, src_page_rotation, actual_page_width,
-        actual_page_height, source_clip_box, &offset_x, &offset_y);
+    CalculateNonScaledClipBoxOffset(gfx_content_rect, src_page_rotation,
+                                    actual_page_width, actual_page_height,
+                                    source_clip_box, &offset_x, &offset_y);
   }
 
   // Reset the media box and crop box. When the page has crop box and media box,

printing/BUILD.gn

@@ -229,13 +229,6 @@ component("printing") {
       "printing_context_linux.h",
     ]
   }
-
-  if (!is_android) {
-    sources += [
-      "pdf_transform.cc",
-      "pdf_transform.h",
-    ]
-  }
 }
 
 static_library("test_support") {
@@ -289,10 +282,6 @@ test("printing_unittests") {
     "//ui/gfx/geometry",
   ]
 
-  if (!is_android) {
-    sources += [ "pdf_transform_unittest.cc" ]
-  }
-
   if (is_win || is_mac) {
     sources += [ "printed_document_unittest.cc" ]
   }