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 struct PrintHostMsg_SetOptionsFromDocument_Params;
  18
  19 namespace content {
  20 class WebContents;
  21 }
  22
  23 namespace gfx {
  24 class Rect;
  25 }
  26
  27 namespace printing {
  28
  29 struct PageSizeMargins;
  30
  31 // Manages the print preview handling for a WebContents.
  32 class PrintPreviewMessageHandler
  33     : public content::WebContentsObserver,
  34       public content::WebContentsUserData<PrintPreviewMessageHandler> {
  35  public:
  36   ~PrintPreviewMessageHandler() override;
  37
  38   // content::WebContentsObserver implementation.
  39   bool OnMessageReceived(const IPC::Message& message) override;
  40
  41  private:
  42   explicit PrintPreviewMessageHandler(content::WebContents* web_contents);
  43   friend class content::WebContentsUserData<PrintPreviewMessageHandler>;
  44
  45   // Gets the print preview dialog associated with the WebContents being
  46   // observed.
  47   content::WebContents* GetPrintPreviewDialog();
  48
  49   // Gets the PrintPreviewUI associated with the WebContents being observed.
  50   PrintPreviewUI* GetPrintPreviewUI();
  51
  52   // Message handlers.
  53   void OnRequestPrintPreview(
  54       const PrintHostMsg_RequestPrintPreview_Params& params);
  55   void OnDidGetDefaultPageLayout(
  56       const printing::PageSizeMargins& page_layout_in_points,
  57       const gfx::Rect& printable_area_in_points,
  58       bool has_custom_page_size_style);
  59   void OnDidGetPreviewPageCount(
  60       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
  61   void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);
  62   void OnMetafileReadyForPrinting(
  63       const PrintHostMsg_DidPreviewDocument_Params& params);
  64   void OnPrintPreviewFailed(int document_cookie);
  65   void OnPrintPreviewCancelled(int document_cookie);
  66   void OnInvalidPrinterSettings(int document_cookie);
  67   void OnSetOptionsFromDocument(
  68       const PrintHostMsg_SetOptionsFromDocument_Params& params);
  69
  70   DISALLOW_COPY_AND_ASSIGN(PrintPreviewMessageHandler);
  71 };
  72
  73 }  // namespace printing
  74
  75 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_MESSAGE_HANDLER_H_