Delegates for the printing component

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);
+
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    // Cancels prerender if it's currently in progress and returns |true| if
+    // the cancellation was done with success.
+    virtual bool CancelPrerender(content::RenderView* render_view,
+                                 int routing_id) = 0;
+
+    // Returns the element to be printed. Returns a null WebElement if
+    // a pdf plugin element can't be extracted from the frame.
+    virtual blink::WebElement GetPdfElement(blink::WebLocalFrame* frame) = 0;
+  };
+
+  PrintWebViewHelper(content::RenderView* render_view,
+                     bool out_of_process_pdf_enabled,
+                     bool print_preview_disabled,
+                     scoped_ptr<Delegate> delegate);
   ~PrintWebViewHelper() override;
 
   // Disable print preview and switch to system dialog printing even if full
   // printing is build-in. This method is used by CEF.
   static void DisablePreview();
 
   bool IsPrintingEnabled();
 
   void PrintNode(const blink::WebNode& node);
 
@@ skipping 240 matching lines @@
   // Used for scripted initiated printing blocking.
   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_;
 
+  // Whether the content to print could be nested in an iframe.
+  const bool out_of_process_pdf_enabled_;
+
+  // Used to check the prerendering status.
+  const scoped_ptr<Delegate> delegate_;
+
   // Keeps track of the state of print preview between messages.
   // TODO(vitalybuka): Create PrintPreviewContext when needed and delete after
   // use. Now it's interaction with various messages is confusing.
   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.
@@ skipping 126 matching lines @@
   base::Closure on_stop_loading_closure_;
 
   base::WeakPtrFactory<PrintWebViewHelper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintWebViewHelper);
 };
 
 }  // namespace printing
 
 #endif  // CHROME_RENDERER_PRINTING_PRINT_WEB_VIEW_HELPER_H_