Print headers and footers with WebKit.

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 4198377b0a6fb7acfff3336986614a5f6a0f5754..6aff3c50a422b019d3c80f8732364022d4e7d604 100644
--- a/chrome/renderer/print_web_view_helper_linux.cc
+++ b/chrome/renderer/print_web_view_helper_linux.cc
@@ -192,8 +192,11 @@ void PrintWebViewHelper::PrintPageInternal(
   gfx::Rect content_area;
   GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, &page_size,
                                           &content_area);
+  gfx::Rect canvas_area =
+      params.params.display_header_footer ? gfx::Rect(page_size) : content_area;
+
   SkDevice* device = metafile->StartPageForVectorCanvas(
-      page_size, content_area, scale_factor);
+      page_size, canvas_area, scale_factor);

[vandebo (ex-Chrome), 2012/11/05 22:56:18]

If you do this, then you'll need to apply a clip to the content area before
drawing it.  Sometimes webkit draws outside of it's bounds because it knows that
it'll get clipped.  Also with this then there is no need for 
device->setDrawingArea(SkPDFDevice::kMargin_DrawingArea); because as far as the
PDF device is concerned the entire page is the drawing area.

Once you had a clip, you may have to do a save or save layer  on the canvas in
order to ensure it isn't obliterated by certain combinations of operations, but
I don't remember well enough.

[Vitaly Buka (NO REVIEWS), 2012/11/06 00:40:15]

Seems webkit clip content well, so I didn't add one.
But setting one more clip is not going to hurt.
Done.

   if (!device)
     return;
 
@@ -203,16 +206,21 @@ void PrintWebViewHelper::PrintPageInternal(
   canvas->unref();  // SkRefPtr and new both took a reference.
   printing::MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
   skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_);
-  frame->printPage(params.page_number, canvas.get());
 
   if (params.params.display_header_footer) {
     // |page_number| is 0-based, so 1 is added.
     // The scale factor on Linux is 1.
+    double page_shrink_factor = frame->getPrintPageShrink(params.page_number);
     PrintHeaderAndFooter(canvas.get(), params.page_number + 1,
                          print_preview_context_.total_page_count(),
-                         scale_factor, page_layout_in_points,
-                         *header_footer_info_, params.params);
+                         scale_factor * page_shrink_factor,
+                         page_layout_in_points, *header_footer_info_,
+                         params.params);
   }
+  canvas->translate((content_area.x() - canvas_area.x()) / scale_factor,
+                    (content_area.y() - canvas_area.y()) / scale_factor);
+
+  frame->printPage(params.page_number, canvas.get());
 
   // Done printing. Close the device context to retrieve the compiled metafile.
   if (!metafile->FinishPage())