chrome/browser/printing/print_view_manager.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_VIEW_MANAGER_H_
   6 #define CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_
   7
   8 #include "chrome/browser/printing/print_view_manager_base.h"
   9 #include "content/public/browser/web_contents_user_data.h"
  10
  11 namespace content {
  12 class RenderProcessHost;
  13 }
  14
  15 namespace printing {
  16
  17 class PrintViewManagerObserver;
  18
  19 // Manages the print commands for a WebContents.
  20 class PrintViewManager : public PrintViewManagerBase,
  21                          public content::WebContentsUserData<PrintViewManager> {
  22  public:
  23   ~PrintViewManager() override;
  24
  25 #if defined(ENABLE_BASIC_PRINTING)
  26   // Same as PrintNow(), but for the case where a user prints with the system
  27   // dialog from print preview.
  28   bool PrintForSystemDialogNow();
  29
  30   // Same as PrintNow(), but for the case where a user press "ctrl+shift+p" to
  31   // show the native system dialog. This can happen from both initiator and
  32   // preview dialog.
  33   bool BasicPrint();
  34 #endif  // ENABLE_BASIC_PRINTING
  35
  36   // Initiate print preview of the current document by first notifying the
  37   // renderer. Since this happens asynchronous, the print preview dialog
  38   // creation will not be completed on the return of this function. Returns
  39   // false if print preview is impossible at the moment.
  40   bool PrintPreviewNow(bool selection_only);
  41
  42   // Notify PrintViewManager that print preview is starting in the renderer for
  43   // a particular WebNode.
  44   void PrintPreviewForWebNode();
  45
  46   // Notify PrintViewManager that print preview has finished. Unfreeze the
  47   // renderer in the case of scripted print preview.
  48   void PrintPreviewDone();
  49
  50   // Sets |observer| as the current PrintViewManagerObserver. Pass in NULL to
  51   // remove the current observer. |observer| may always be NULL, but |observer_|
  52   // must be NULL if |observer| is non-NULL.
  53   void set_observer(PrintViewManagerObserver* observer);
  54
  55   // content::WebContentsObserver implementation.
  56   bool OnMessageReceived(const IPC::Message& message) override;
  57
  58   // content::WebContentsObserver implementation.
  59   void RenderFrameCreated(content::RenderFrameHost* render_frame_host) override;
  60
  61   // content::WebContentsObserver implementation.
  62   // Terminates or cancels the print job if one was pending.
  63   void RenderProcessGone(base::TerminationStatus status) override;
  64
  65  private:
  66   explicit PrintViewManager(content::WebContents* web_contents);
  67   friend class content::WebContentsUserData<PrintViewManager>;
  68
  69   enum PrintPreviewState {
  70     NOT_PREVIEWING,
  71     USER_INITIATED_PREVIEW,
  72     SCRIPTED_PREVIEW,
  73   };
  74
  75   // IPC Message handlers.
  76   void OnDidShowPrintDialog();
  77   void OnSetupScriptedPrintPreview(IPC::Message* reply_msg);
  78   void OnShowScriptedPrintPreview(bool source_is_modifiable);
  79   void OnScriptedPrintPreviewReply(IPC::Message* reply_msg);
  80
  81   // Weak pointer to an observer that is notified when the print dialog is
  82   // shown.
  83   PrintViewManagerObserver* observer_;
  84
  85   // Current state of print preview for this view.
  86   PrintPreviewState print_preview_state_;
  87
  88   // Keeps track of the pending callback during scripted print preview.
  89   content::RenderProcessHost* scripted_print_preview_rph_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(PrintViewManager);
  92 };
  93
  94 }  // namespace printing
  95
  96 #endif  // CHROME_BROWSER_PRINTING_PRINT_VIEW_MANAGER_H_