Added Header and Footer support using Skia

chrome/renderer/print_web_view_helper_linux.cc

Index: chrome/renderer/print_web_view_helper_linux.cc
diff --git a/chrome/renderer/print_web_view_helper_linux.cc b/chrome/renderer/print_web_view_helper_linux.cc
index 9255a007bfc51867ec19bdadb47c67e446c21ee6..5b3de1c5d88ef6e011669147f66b989280b6330a 100644
--- a/chrome/renderer/print_web_view_helper_linux.cc
+++ b/chrome/renderer/print_web_view_helper_linux.cc
@@ -8,13 +8,18 @@
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/common/print_messages.h"
 #include "content/common/view_messages.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "printing/metafile_skia_wrapper.h"
 #include "skia/ext/vector_canvas.h"
+#include "skia/ext/vector_platform_device_skia.h"
+#include "third_party/skia/include/core/SkColor.h"
+#include "third_party/skia/include/core/SkDraw.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
+#include "third_party/skia/include/core/SkTypeface.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrame.h"
 #include "ui/gfx/point.h"
 
@@ -164,6 +169,7 @@ bool PrintWebViewHelper::RenderPages(const PrintMsg_PrintPages_Params& params,
                                                   *page_count));
 #endif
   }
+  int total_pages = *page_count;

[kmadhusu, 2011/07/14 01:50:15]

|total_pages| is not required. At this point, you have already stored the page
count in |preview_page_count_|.

[Aayush Kumar, 2011/07/19 01:20:30]

Done.

 
   base::TimeTicks begin_time = base::TimeTicks::Now();
   base::TimeTicks page_begin_time = begin_time;
@@ -174,7 +180,8 @@ bool PrintWebViewHelper::RenderPages(const PrintMsg_PrintPages_Params& params,
   if (params.pages.empty()) {
     for (int i = 0; i < *page_count; ++i) {
       page_params.page_number = i;
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, metafile, is_preview,
+          total_pages);
       if (is_preview) {
         page_begin_time = ReportPreviewPageRenderTime(page_begin_time);
         if (!PreviewPageRendered(i))
@@ -184,7 +191,8 @@ bool PrintWebViewHelper::RenderPages(const PrintMsg_PrintPages_Params& params,
   } else {
     for (size_t i = 0; i < params.pages.size(); ++i) {
       page_params.page_number = params.pages[i];
-      PrintPageInternal(page_params, canvas_size, frame, metafile);
+      PrintPageInternal(page_params, canvas_size, frame, metafile, is_preview,
+          total_pages);
       if (is_preview) {
         page_begin_time = ReportPreviewPageRenderTime(page_begin_time);
         if (!PreviewPageRendered(params.pages[i]))
@@ -210,22 +218,12 @@ void PrintWebViewHelper::PrintPageInternal(
     const PrintMsg_PrintPage_Params& params,
     const gfx::Size& canvas_size,
     WebFrame* frame,
-    printing::Metafile* metafile) {
-  double content_width_in_points;
-  double content_height_in_points;
-  double margin_top_in_points;
-  double margin_right_in_points;
-  double margin_bottom_in_points;
-  double margin_left_in_points;
+    printing::Metafile* metafile,
+    bool is_preview,
+    int total_pages) {

[kmadhusu, 2011/07/14 01:50:15]

You don't need |total_pages|. Just use |preview_page_count_|.

[Aayush Kumar, 2011/07/19 01:20:30]

Done.

   GetPageSizeAndMarginsInPoints(frame,
                                 params.page_number,
-                                params.params,
-                                &content_width_in_points,
-                                &content_height_in_points,
-                                &margin_top_in_points,
-                                &margin_right_in_points,
-                                &margin_bottom_in_points,
-                                &margin_left_in_points);
+                                params.params);
 
   gfx::Size page_size(
       content_width_in_points + margin_right_in_points +
@@ -245,6 +243,13 @@ void PrintWebViewHelper::PrintPageInternal(
   SkRefPtr<skia::VectorCanvas> canvas = new skia::VectorCanvas(device);
   canvas->unref();  // SkRefPtr and new both took a reference.
   printing::MetafileSkiaWrapper::SetMetafileOnCanvas(canvas.get(), metafile);
+
+  if (is_preview && params.params.header_footer) {
+    // The page_number count starts from '0', so, we add by '1'.
+    // The scale factor on Linux is '1' which is the last parameter.
+    PrintHeaderAndFooter(device, canvas, params.page_number+1, total_pages, 1);

[kmadhusu, 2011/07/14 01:50:15]

Why the scale factor on linux is '1'?

[Aayush Kumar, 2011/07/19 01:20:30]

The scale factor on linux is not used and is not relevant.  That's why it's
treated as '1'.
On 2011/07/14 01:50:15, kmadhusu wrote:

+  }
+
   frame->printPage(params.page_number, canvas.get());
 
   // TODO(myhuang): We should render the header and the footer.