src/chrome/browser/printing/print_preview_message_handler.h

   1 // Copyright (c) 2012 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
   8 #include "base/compiler_specific.h"
   9 #include "content/public/browser/web_contents_observer.h"
  10 #include "content/public/browser/web_contents_user_data.h"
  11
  12 class PrintPreviewUI;
  13 struct PrintHostMsg_DidGetPreviewPageCount_Params;
  14 struct PrintHostMsg_DidPreviewDocument_Params;
  15 struct PrintHostMsg_DidPreviewPage_Params;
  16 struct PrintHostMsg_RequestPrintPreview_Params;
  17
  18 namespace content {
  19 class WebContents;
  20 }
  21
  22 namespace gfx {
  23 class Rect;
  24 }
  25
  26 namespace printing {
  27
  28 struct PageSizeMargins;
  29
  30 // Manages the print preview handling for a WebContents.
  31 class PrintPreviewMessageHandler
  32     : public content::WebContentsObserver,
  33       public content::WebContentsUserData<PrintPreviewMessageHandler> {
  34  public:
  35   virtual ~PrintPreviewMessageHandler();
  36
  37   // content::WebContentsObserver implementation.
  38   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  39
  40  private:
  41   explicit PrintPreviewMessageHandler(content::WebContents* web_contents);
  42   friend class content::WebContentsUserData<PrintPreviewMessageHandler>;
  43
  44   // Gets the print preview dialog associated with the WebContents being
  45   // observed.
  46   content::WebContents* GetPrintPreviewDialog();
  47
  48   // Gets the PrintPreviewUI associated with the WebContents being observed.
  49   PrintPreviewUI* GetPrintPreviewUI();
  50
  51   // Message handlers.
  52   void OnRequestPrintPreview(
  53       const PrintHostMsg_RequestPrintPreview_Params& params);
  54   void OnDidGetDefaultPageLayout(
  55       const printing::PageSizeMargins& page_layout_in_points,
  56       const gfx::Rect& printable_area_in_points,
  57       bool has_custom_page_size_style);
  58   void OnDidGetPreviewPageCount(
  59       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
  60   void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
  61   void OnMetafileReadyForPrinting(
  62       const PrintHostMsg_DidPreviewDocument_Params& params);
  63   void OnPrintPreviewFailed(int document_cookie);
  64   void OnPrintPreviewCancelled(int document_cookie);
  65   void OnInvalidPrinterSettings(int document_cookie);
  66   void OnPrintPreviewScalingDisabled();
  67
  68   DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
  69 };
  70
  71 }  // namespace printing
  72
  73 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_