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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
      6 #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
      7 #pragma once
      8 
      9 #include "content/browser/tab_contents/tab_contents_observer.h"
     10 
     11 struct PrintHostMsg_DidPreviewDocument_Params;
     12 
     13 namespace printing {
     14 
     15 // TabContents offloads print preview message handling to
     16 // PrintPreviewMessageHandler. This object has the same life time as the
     17 // TabContents that owns it.
     18 class PrintPreviewMessageHandler : public TabContentsObserver {
     19  public:
     20   explicit PrintPreviewMessageHandler(TabContents* tab_contents);
     21   virtual ~PrintPreviewMessageHandler();
     22 
     23   // TabContentsObserver implementation.
     24   virtual bool OnMessageReceived(const IPC::Message& message);
     25   virtual void DidStartLoading();
     26 
     27  private:
     28   // Gets the print preview tab associated with |owner_|.
     29   TabContents* GetPrintPreviewTab();
     30 
     31   void OnPagesReadyForPreview(
     32       const PrintHostMsg_DidPreviewDocument_Params& params);
     33   void OnPrintPreviewNodeUnderContextMenu();
     34   void OnScriptInitiatedPrintPreview();
     35 
     36   DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
     37 };
     38 
     39 }  // namespace printing
     40 
     41 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_
     42