[Experimental] Supporting OOPIF printing

third_party/WebKit/Source/core/page/PrintContext.cpp

 /*
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  * Copyright (C) 2007 Apple Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 49 matching lines @@
   if (!m_frame->document() || !m_frame->view() ||
       m_frame->document()->layoutViewItem().isNull())
     return;
 
   if (userScaleFactor <= 0) {
     DLOG(ERROR) << "userScaleFactor has bad value " << userScaleFactor;
     return;
   }
 
   LayoutViewItem view = m_frame->document()->layoutViewItem();
-  const IntRect& documentRect = view.documentRect();
+  const IntRect& documentRect0 = view.documentRect();
+  IntSize layout1Rect = view.layoutSize(IncludeScrollbars);
+  IntRect documentRect(documentRect0.location(), layout1Rect);
+
   FloatSize pageSize = m_frame->resizePageRectsKeepingRatio(
       FloatSize(printRect.width(), printRect.height()),
       FloatSize(documentRect.width(), documentRect.height()));
   float pageWidth = pageSize.width();
   float pageHeight = pageSize.height();
 
   outPageHeight =
       pageHeight;  // this is the height of the page adjusted by margins
   pageHeight -= headerHeight + footerHeight;
 
@@ skipping 13 matching lines @@
 }
 
 void PrintContext::computePageRectsWithPageSizeInternal(
     const FloatSize& pageSizeInPixels) {
   if (!m_frame->document() || !m_frame->view() ||
       m_frame->document()->layoutViewItem().isNull())
     return;
 
   LayoutViewItem view = m_frame->document()->layoutViewItem();
 
-  IntRect docRect = view.documentRect();
+  IntRect docRect0 = view.documentRect();
+  IntRect viewRect(view.viewRect());
+  IntSize layoutRect = view.layoutSize();
+  IntSize layout1Rect = view.layoutSize(IncludeScrollbars);
+  IntRect docRect(docRect0.location(), layout1Rect);
 
   int pageWidth = pageSizeInPixels.width();
   // We scaled with floating point arithmetic and need to ensure results like
   // 13329.99 are treated as 13330 so that we don't mistakenly assign an extra
   // page for the stray pixel.
   int pageHeight = pageSizeInPixels.height() + LayoutUnit::epsilon();
 
   bool isHorizontal = view.style()->isHorizontalWritingMode();
 
   int docLogicalHeight = isHorizontal ? docRect.height() : docRect.width();
@@ skipping 227 matching lines @@
   printContext.computePageRectsWithPageSize(scaledPageSize);
   return printContext.pageCount();
 }
 
 DEFINE_TRACE(PrintContext) {
   visitor->trace(m_frame);
   visitor->trace(m_linkedDestinations);
 }
 
 }  // namespace blink