Fixed print_web_view_helper for CEF.

chrome/renderer/printing/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_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 #define CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 48 matching lines @@
   blink::WebLocalFrame* frame_;
 };
 
 // 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,
       public content::RenderViewObserverTracker<PrintWebViewHelper> {
  public:
-  explicit PrintWebViewHelper(content::RenderView* render_view);
+  PrintWebViewHelper(content::RenderView* render_view,
+                     bool preview_enabled,
+                     bool scripted_print_throttling_disabled);
   virtual ~PrintWebViewHelper();
 
   bool IsPrintingEnabled();
 
   void PrintNode(const blink::WebNode& node);
 
  private:
   friend class PrintWebViewHelperTestBase;
   FRIEND_TEST_ALL_PREFIXES(PrintWebViewHelperPreviewTest,
                            BlockScriptInitiatedPrinting);
@@ skipping 197 matching lines @@
   bool GetPrintFrame(blink::WebLocalFrame** frame);
 
   // Script Initiated Printing ------------------------------------------------
 
   // Return true if script initiated printing is currently
   // allowed. |user_initiated| should be true when a user event triggered the
   // script, most likely by pressing a print button on the page.
   bool IsScriptInitiatedPrintAllowed(blink::WebFrame* frame,
                                      bool user_initiated);
 
-  // Shows scripted print preview when options from plugin are available.
+  // Returns true if script initiated printing occurs too often.
+  bool IsScriptInitiatedPrintTooFrequent(blink::WebFrame* frame);
+
+  // Reset the counter for script initiated printing.
+  // Scripted printing will be allowed to continue.
+  void ResetScriptedPrintCount();
+
+  // Increment the counter for script initiated printing.
+  // Scripted printing will be blocked for a limited amount of time.
+  void IncrementScriptedPrintCount();
+
+  // Shows scripted print preview when options from plugin are availible.
   void ShowScriptedPrintPreview();
 
   void RequestPrintPreview(PrintPreviewRequestType type);
 
   // Checks whether print preview should continue or not.
-  // Returns true if canceling, false if continuing.
+  // Returns true if cancelling, false if continuing.
   bool CheckForCancel();
 
   // Notifies the browser a print preview page has been rendered.
   // |page_number| is 0-based.
   // For a valid |page_number| with modifiable content,
   // |metafile| is the rendered page. Otherwise |metafile| is NULL.
   // Returns true if print preview should continue, false on failure.
   bool PreviewPageRendered(int page_number, Metafile* metafile);
 
   void SetPrintPagesParams(const PrintMsg_PrintPages_Params& settings);
 
   // WebView used only to print the selection.
   scoped_ptr<PrepareFrameAndViewForPrint> prep_frame_view_;
   bool reset_prep_frame_view_;
 
   scoped_ptr<PrintMsg_PrintPages_Params> print_pages_params_;
+  bool is_preview_enabled_;
+  bool is_scripted_print_throttling_disabled_;
   bool is_print_ready_metafile_sent_;
   bool ignore_css_margins_;
+
   // Used for scripted initiated printing blocking.
+  base::Time last_cancelled_script_print_;
+  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_;
 
   // Keeps track of the state of print preview between messages.
@@ skipping 115 matching lines @@
   // hangs because RequestPrintPreview is called before DidStopLoading() is
   // called. This is a store for the RequestPrintPreview() call and its
   // parameters so that it can be invoked after DidStopLoading.
   base::Closure on_stop_loading_closure_;
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_