Added Header and Footer support using Skia

chrome/renderer/print_web_view_helper_linux.cc

 // 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 "chrome/renderer/print_web_view_helper.h"
 
 #include "base/file_descriptor_posix.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
@@ skipping 18 matching lines @@
   PrintMsg_PrintPage_Params page_params;
   page_params.params = print_preview_context_.print_params();
   page_params.page_number = page_number;
   page_params.page_slot =
       print_preview_context_.GetPageSlotForPage(page_number);
 
   base::TimeTicks begin_time = base::TimeTicks::Now();
   PrintPageInternal(page_params,
                     print_preview_context_.GetPrintCanvasSize(),
                     print_preview_context_.frame(),
+                    true,
                     print_preview_context_.metafile());
 
   print_preview_context_.RenderedPreviewPage(
       base::TimeTicks::Now() - begin_time);
   printing::Metafile* page_metafile = NULL;
   if (print_preview_context_.IsModifiable()) {
     page_metafile = reinterpret_cast<printing::PreviewMetafile*>(
         print_preview_context_.metafile())->GetMetafileForCurrentPage();
   }
   PreviewPageRendered(page_number, page_metafile);
@@ skipping 107 matching lines @@
   base::TimeTicks begin_time = base::TimeTicks::Now();
   base::TimeTicks page_begin_time = begin_time;
 
   PrintMsg_PrintPage_Params page_params;
   page_params.params = print_params;
   const gfx::Size& canvas_size = prepare->GetPrintCanvasSize();
   if (params.pages.empty()) {
     for (int i = 0; i < *page_count; ++i) {
       page_params.page_number = i;
       page_params.page_slot = i;
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, false, metafile);

[vandebo (ex-Chrome), 2011/08/01 21:07:37]

Instead of changing the signature of this method, why not just set
params.params.display_header_footer = false before the for loop?

[Aayush Kumar, 2011/08/02 00:18:13]

Done.

     }
   } else {
     for (size_t i = 0; i < params.pages.size(); ++i) {
       page_params.page_number = params.pages[i];
       page_params.page_slot = i;
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, false, metafile);
     }
   }
 
   base::TimeDelta render_time = base::TimeTicks::Now() - begin_time;
 
   prepare->FinishPrinting();
   metafile->FinishDocument();
   return true;
 }
 
 void PrintWebViewHelper::PrintPageInternal(
     const PrintMsg_PrintPage_Params& params,
     const gfx::Size& canvas_size,
     WebFrame* frame,
+    bool is_preview,
     printing::Metafile* metafile) {
   PageSizeMargins page_layout_in_points;
   GetPageSizeAndMarginsInPoints(frame, params.page_number, params.params,
                                 &page_layout_in_points);
 
   gfx::Size page_size(
       page_layout_in_points.content_width +
           page_layout_in_points.margin_right +
           page_layout_in_points.margin_left,
       page_layout_in_points.content_height +
           page_layout_in_points.margin_top +
           page_layout_in_points.margin_bottom);
   gfx::Rect content_area(page_layout_in_points.margin_left,
                          page_layout_in_points.margin_top,
                          page_layout_in_points.content_width,
                          page_layout_in_points.content_height);
 
   SkDevice* device = metafile->StartPageForVectorCanvas(
       params.page_slot, page_size, content_area, 1.0f);
   if (!device)
     return;
 
   // The printPage method take a reference to the canvas we pass down, so it
   // can't be a stack object.
   SkRefPtr<skia::VectorCanvas> canvas = new skia::VectorCanvas(device);
   canvas->unref();  // SkRefPtr and new both took a reference.
   printing::MetafileSkiaWrapper::SetMetafileOnCanvas(canvas.get(), metafile);
   frame->printPage(params.page_number, canvas.get());
 
-  // TODO(myhuang): We should render the header and the footer.
+  if (is_preview && params.params.display_header_footer) {
+    // |page_number| is 0-based, so 1 is added.
+    // The scale factor on Linux is 1.
+    PrintHeaderAndFooter(device, *canvas, params.page_number + 1,
+                         print_preview_context_.total_page_count(), 1,
+                         page_layout_in_points, *header_footer_info_);
+  }
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   if (!metafile->FinishPage())
     NOTREACHED() << "metafile failed";
 }