PrintBrowser: Pick page size based on the default language.

third_party/WebKit/Source/core/frame/FrameView.cpp

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999 Lars Knoll <knoll@kde.org>
  *                     1999 Antti Koivisto <koivisto@kde.org>
  *                     2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  *           (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
@@ skipping 88 matching lines @@
 #include "core/paint/PaintLayer.h"
 #include "core/paint/PaintTiming.h"
 #include "core/paint/PrePaintTreeWalk.h"
 #include "core/plugins/PluginView.h"
 #include "core/probe/CoreProbes.h"
 #include "core/style/ComputedStyle.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGSVGElement.h"
 #include "platform/Histogram.h"
 #include "platform/HostWindow.h"
+#include "platform/Language.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/ScriptForbiddenScope.h"
 #include "platform/WebFrameScheduler.h"
 #include "platform/fonts/FontCache.h"
 #include "platform/geometry/DoubleRect.h"
 #include "platform/geometry/FloatRect.h"
 #include "platform/geometry/LayoutRect.h"
 #include "platform/geometry/TransformState.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/GraphicsLayer.h"
@@ skipping 19 matching lines @@
 // false, program will crash if DCHECK_IS_ON() or return false from the current
 // function.
 #define CHECK_FOR_DIRTY_LAYOUT(arg) \
   do {                              \
     if (!(arg)) {                   \
       NOTREACHED();                 \
       return false;                 \
     }                               \
   } while (false)
 
+namespace {
+
+// Page dimensions in pixels at 72 DPI.
+constexpr int kA4PortraitPageWidth = 595;
+constexpr int kA4PortraitPageHeight = 842;
+constexpr int kLetterPortraitPageWidth = 612;
+constexpr int kLetterPortraitPageHeight = 792;
+
+}  // namespace
+
 namespace blink {
 
-// A4 Portrait dimensions in pixels
-const int kA4PortraitPageWidth = 595;
-const int kA4PortraitPageHeight = 842;
-
 using namespace HTMLNames;
 
 // The maximum number of updatePlugins iterations that should be done before
 // returning.
 static const unsigned kMaxUpdatePluginsIterations = 2;
 static const double kResourcePriorityUpdateDelayAfterScroll = 0.250;
 
 static bool g_initial_track_all_paint_invalidations = false;
 
 FrameView::FrameView(LocalFrame& frame)
@@ skipping 2820 matching lines @@
   }
 }
 
 void FrameView::SetupPrintContext() {
   if (frame_->GetDocument()->Printing())
     return;
   if (!print_context_)
     print_context_ = new PrintContext(frame_);
   if (frame_->GetSettings())
     frame_->GetSettings()->SetShouldPrintBackgrounds(true);
-  FloatRect page_rect(0, 0, kA4PortraitPageWidth, kA4PortraitPageHeight);
+  bool is_us = DefaultLanguage() == "en-US";
+  int width = is_us ? kLetterPortraitPageWidth : kA4PortraitPageWidth;
+  int height = is_us ? kLetterPortraitPageHeight : kA4PortraitPageHeight;
+  FloatRect page_rect(0, 0, width, height);
   print_context_->begin(page_rect.Width(), page_rect.Height());
-  float height;
-  print_context_->ComputePageRects(page_rect, 0, 0, 1.0, height);
+  float dummy_height;
+  print_context_->ComputePageRects(page_rect, 0, 0, 1.0, dummy_height);
   DispatchEventsForPrintingOnAllFrames();
 }
 
 void FrameView::ClearPrintContext() {
   if (!print_context_)
     return;
   print_context_->end();
   print_context_.Clear();
 }
 
@@ skipping 2323 matching lines @@
 void FrameView::SetAnimationHost(
     std::unique_ptr<CompositorAnimationHost> host) {
   animation_host_ = std::move(host);
 }
 
 LayoutUnit FrameView::CaretWidth() const {
   return LayoutUnit(GetHostWindow()->WindowToViewportScalar(1));
 }
 
 }  // namespace blink