Adds option to enable CSS backgrounds for printing.

chrome/renderer/print_web_view_helper.cc

 // 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 "chrome/renderer/print_web_view_helper.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 91 matching lines @@
          oldParams.pages.size() == newParams.pages.size() &&
          oldParams.params.print_to_pdf == newParams.params.print_to_pdf &&
          oldParams.params.print_scaling_option ==
              newParams.params.print_scaling_option &&
          oldParams.params.display_header_footer ==
              newParams.params.display_header_footer &&
          oldParams.params.date == newParams.params.date &&
          oldParams.params.title == newParams.params.title &&
          oldParams.params.url == newParams.params.url &&
          std::equal(oldParams.pages.begin(), oldParams.pages.end(),
-             newParams.pages.begin());
+             newParams.pages.begin()) &&
+         oldParams.params.should_print_backgrounds ==
+             newParams.params.should_print_backgrounds;
 }
 
 PrintMsg_Print_Params GetCssPrintParams(
     WebKit::WebFrame* frame,
     int page_index,
     const PrintMsg_Print_Params& page_params) {
   PrintMsg_Print_Params page_css_params = page_params;
   int dpi = GetDPI(&page_params);
 
   using printing::ConvertUnit;
@@ skipping 364 matching lines @@
           expected_pages_count_(0),
           use_browser_overlays_(true),
           finished_(false) {
   WebKit::WebPrintParams webkit_print_params;
   ComputeWebKitPrintParamsInDesiredDpi(print_params, &webkit_print_params);
 
   if (WebKit::WebFrame* web_frame = web_view_->mainFrame())
     prev_scroll_offset_ = web_frame->scrollOffset();
   prev_view_size_ = web_view_->size();
 
+  should_print_backgrounds_ = print_params.should_print_backgrounds;

[Lei Zhang, 2013/01/11 00:30:04]

You can just put this in the initializer list.

[Toscano, 2013/01/11 01:41:05]

Done.

+
   StartPrinting(webkit_print_params);
 }
 
 PrepareFrameAndViewForPrint::~PrepareFrameAndViewForPrint() {
   FinishPrinting();
 }
 
 void PrepareFrameAndViewForPrint::UpdatePrintParams(
     const PrintMsg_Print_Params& print_params) {
   DCHECK(!finished_);
   WebKit::WebPrintParams webkit_print_params;
   ComputeWebKitPrintParamsInDesiredDpi(print_params, &webkit_print_params);
 
+  should_print_backgrounds_ = print_params.should_print_backgrounds;
+
   if (webkit_print_params.printContentArea ==
           web_print_params_.printContentArea &&
       webkit_print_params.printableArea == web_print_params_.printableArea &&
       webkit_print_params.paperSize == web_print_params_.paperSize &&
       webkit_print_params.printScalingOption ==
           web_print_params_.printScalingOption) {
     return;
   }
 
   frame_->printEnd();
@@ skipping 17 matching lines @@
   gfx::Size print_layout_size(web_print_params_.printContentArea.width,
                               web_print_params_.printContentArea.height);
   print_layout_size.set_height(static_cast<int>(
       static_cast<double>(print_layout_size.height()) * 1.25));
 
   web_view_->resize(print_layout_size);
 
   expected_pages_count_ = frame_->printBegin(web_print_params_,
                                              node_to_print_,
                                              &use_browser_overlays_);
+
+  web_view_->settings()->setShouldPrintBackgrounds(should_print_backgrounds_);
 }
 
 void PrepareFrameAndViewForPrint::FinishPrinting() {
   if (!finished_) {
     finished_ = true;
     frame_->printEnd();
     web_view_->resize(prev_view_size_);
     if (WebKit::WebFrame* web_frame = web_view_->mainFrame())
       web_frame->setScrollOffset(prev_scroll_offset_);
+    web_view_->settings()->setShouldPrintBackgrounds(false);
   }
 }
 
 PrintWebViewHelper::PrintWebViewHelper(content::RenderView* render_view)
     : content::RenderViewObserver(render_view),
       content::RenderViewObserverTracker<PrintWebViewHelper>(render_view),
       print_web_view_(NULL),
       is_preview_enabled_(IsPrintPreviewEnabled()),
       is_scripted_print_throttling_disabled_(IsPrintThrottlingDisabled()),
       is_print_ready_metafile_sent_(false),
@@ skipping 776 matching lines @@
       header_footer_info_->SetString(printing::kSettingHeaderFooterURL,
                                      settings.params.url);
       header_footer_info_->SetString(printing::kSettingHeaderFooterTitle,
                                      settings.params.title);
     }
   }
 
   print_pages_params_.reset(new PrintMsg_PrintPages_Params(settings));
   Send(new PrintHostMsg_DidGetDocumentCookie(routing_id(),
                                              settings.params.document_cookie));
+
   return true;
 }
 
 bool PrintWebViewHelper::GetPrintSettingsFromUser(WebKit::WebFrame* frame,
                                                   const WebKit::WebNode& node,
                                                   int expected_pages_count,
                                                   bool use_browser_overlays) {
   PrintHostMsg_ScriptedPrint_Params params;
   PrintMsg_PrintPages_Params print_settings;
 
@@ skipping 393 matching lines @@
   DCHECK(IsRendering());
   return prep_frame_view_->GetPrintCanvasSize();
 }
 
 void PrintWebViewHelper::PrintPreviewContext::ClearContext() {
   prep_frame_view_.reset();
   metafile_.reset();
   pages_to_render_.clear();
   error_ = PREVIEW_ERROR_NONE;
 }