[Print Preview] Modified PrepareFrameAndViewPrint class to call the new printBegin function to supp…

chrome/renderer/print_web_view_helper.h

 // 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.
 
 #ifndef CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_
 #pragma once
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/shared_memory.h"
 #include "base/time.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "content/public/renderer/render_view_observer_tracker.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCanvas.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebFrameClient.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebNode.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebPrintScalingOption.h"

[kmadhusu, 2012/04/20 22:23:58]

Style??? Do I need to intent 4 space?

[kmadhusu, 2012/04/23 17:39:10]

Leaving this as it is.

 #include "third_party/WebKit/Source/WebKit/chromium/public/WebViewClient.h"
 #include "ui/gfx/size.h"
 
 struct PrintMsg_Print_Params;
 struct PrintMsg_PrintPage_Params;
 struct PrintMsg_PrintPages_Params;
 
 namespace base {
 class DictionaryValue;
 }
 namespace printing {
 struct PageSizeMargins;
 }
 
 // Class that calls the Begin and End print functions on the frame and changes
 // the size of the view temporarily to support full page printing..
 // Do not serve any events in the time between construction and destruction of
 // this class because it will cause flicker.
 class PrepareFrameAndViewForPrint {
  public:
   // Prints |frame|.  If |node| is not NULL, then only that node will be
   // printed.
   PrepareFrameAndViewForPrint(const PrintMsg_Print_Params& print_params,
                               WebKit::WebFrame* frame,
-                              const WebKit::WebNode& node);
+                              const WebKit::WebNode& node,
+                              WebKit::WebPrintScalingOption option);
   ~PrepareFrameAndViewForPrint();
 
   void UpdatePrintParams(const PrintMsg_Print_Params& print_params);
 
   int GetExpectedPageCount() const {
     return expected_pages_count_;
   }
 
   bool ShouldUseBrowserOverlays() const {
     return use_browser_overlays_;
   }
 
   const gfx::Size& GetPrintCanvasSize() const {
     return print_canvas_size_;
   }
 
   void FinishPrinting();
 
  private:
-  void StartPrinting(const gfx::Size& print_params);
+  void StartPrinting(const gfx::Size& canvas_size,
+                     const gfx::Rect& printable_area,
+                     const gfx::Size& paper_size);
 
   WebKit::WebFrame* frame_;
   WebKit::WebNode node_to_print_;
   WebKit::WebView* web_view_;
   gfx::Size print_canvas_size_;
+  gfx::Rect printable_area_;
+  gfx::Size paper_size_;
   gfx::Size prev_view_size_;
   gfx::Size prev_scroll_offset_;
   int dpi_;
   int expected_pages_count_;
   bool use_browser_overlays_;
+  WebKit::WebPrintScalingOption print_scaling_option_;
   bool finished_;
 
   DISALLOW_COPY_AND_ASSIGN(PrepareFrameAndViewForPrint);
 };
 
 // PrintWebViewHelper handles most of the printing grunt work for RenderView.
 // We plan on making print asynchronous and that will require copying the DOM
 // of the document and creating a new WebView with the contents.
 class PrintWebViewHelper
     : public content::RenderViewObserver,
@@ skipping 107 matching lines @@
 
   void Print(WebKit::WebFrame* frame, const WebKit::WebNode& node);
 
   // Notification when printing is done - signal tear-down/free resources.
   void DidFinishPrinting(PrintingResult result);
 
   // Print Settings -----------------------------------------------------------
 
   // Initialize print page settings with default settings.
   // Used only for native printing workflow.
-  bool InitPrintSettings();
+  bool InitPrintSettings(bool fit_to_paper_size);
 
   // Initialize print page settings with default settings and prepare the frame
   // for print. A new PrepareFrameAndViewForPrint is created to fulfill the
   // request and is filled into the |prepare| argument.
   // Used only for native printing workflow.
   bool InitPrintSettingsAndPrepareFrame(
       WebKit::WebFrame* frame,
       const WebKit::WebNode& node,
       scoped_ptr<PrepareFrameAndViewForPrint>* prepare);
 
@@ skipping 144 matching lines @@
   int user_cancelled_scripted_print_count_;
   bool is_scripted_printing_blocked_;
 
   // Let the browser process know of a printing failure. Only set to false when
   // the failure came from the browser in the first place.
   bool notify_browser_of_print_failure_;
 
   // True, when printing from print preview.
   bool print_for_preview_;
 
+  // Specifies the print scaling option for the current workflow.
+  WebKit::WebPrintScalingOption print_scaling_option_;
+
   scoped_ptr<PrintMsg_PrintPages_Params> old_print_pages_params_;
 
   // Strings generated by the browser process to be printed as headers and
   // footers if requested by the user.
   scoped_ptr<base::DictionaryValue> header_footer_info_;
 
   // Keeps track of the state of print preview between messages.
   class PrintPreviewContext {
    public:
     PrintPreviewContext();
     ~PrintPreviewContext();
 
     // Initializes the print preview context. Need to be called to set
     // the |web_frame| / |web_node| to generate the print preview for.
     void InitWithFrame(WebKit::WebFrame* web_frame);
     void InitWithNode(const WebKit::WebNode& web_node);
 
     // Does bookkeeping at the beginning of print preview.
     void OnPrintPreview();
 
     // Create the print preview document. |pages| is empty to print all pages.
     bool CreatePreviewDocument(PrintMsg_Print_Params* params,
                                const std::vector<int>& pages,
-                               bool ignore_css_margins);
+                               bool ignore_css_margins,
+                               WebKit::WebPrintScalingOption scaling_option);
 
     // Called after a page gets rendered. |page_time| is how long the
     // rendering took.
     void RenderedPreviewPage(const base::TimeDelta& page_time);
 
     // Updates the print preview context when the required pages are rendered.
     void AllPagesRendered();
 
     // Finalizes the print ready preview document.
     void FinalizePrintReadyDocument();
@@ skipping 65 matching lines @@
     enum PrintPreviewErrorBuckets error_;
 
     State state_;
   };
 
   PrintPreviewContext print_preview_context_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 #endif  // CHROME_RENDERER_PRINT_WEB_VIEW_HELPER_H_