chrome/browser/ui/webui/constrained_web_dialog_ui.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_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
   6 #define CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "components/web_modal/native_web_contents_modal_dialog.h"
  10 #include "content/public/browser/web_ui_controller.h"
  11 #include "ui/gfx/native_widget_types.h"
  12
  13 namespace content {
  14 class BrowserContext;
  15 class RenderViewHost;
  16 class WebContents;
  17 }
  18
  19 namespace ui {
  20 class WebDialogDelegate;
  21 class WebDialogWebContentsDelegate;
  22 }
  23
  24 class ConstrainedWebDialogDelegate {
  25  public:
  26   virtual const ui::WebDialogDelegate* GetWebDialogDelegate() const = 0;
  27   virtual ui::WebDialogDelegate* GetWebDialogDelegate() = 0;
  28
  29   // Called when the dialog is being closed in response to a "DialogClose"
  30   // message from WebUI.
  31   virtual void OnDialogCloseFromWebUI() = 0;
  32
  33   // If called, on dialog closure, the dialog will release its WebContents
  34   // instead of destroying it. After which point, the caller will own the
  35   // released WebContents.
  36   virtual void ReleaseWebContentsOnDialogClose() = 0;
  37
  38   // Returns the WebContents owned by the constrained window.
  39   virtual content::WebContents* GetWebContents() = 0;
  40
  41   // Returns the native type used to display the dialog.
  42   virtual web_modal::NativeWebContentsModalDialog GetNativeDialog() = 0;
  43
  44  protected:
  45   virtual ~ConstrainedWebDialogDelegate() {}
  46 };
  47
  48 // ConstrainedWebDialogUI is a facility to show HTML WebUI content
  49 // in a tab-modal constrained dialog.  It is implemented as an adapter
  50 // between an WebDialogUI object and a web contents modal dialog.
  51 //
  52 // Since the web contents modal dialog requires platform-specific delegate
  53 // implementations, this class is just a factory stub.
  54 class ConstrainedWebDialogUI
  55     : public content::WebUIController {
  56  public:
  57   explicit ConstrainedWebDialogUI(content::WebUI* web_ui);
  58   virtual ~ConstrainedWebDialogUI();
  59
  60   // WebUIController implementation:
  61   virtual void RenderViewCreated(
  62       content::RenderViewHost* render_view_host) OVERRIDE;
  63
  64   // Sets the delegate on the WebContents.
  65   static void SetConstrainedDelegate(content::WebContents* web_contents,
  66                                      ConstrainedWebDialogDelegate* delegate);
  67
  68  protected:
  69   // Returns the ConstrainedWebDialogDelegate saved with the WebContents.
  70   // Returns NULL if no such delegate is set.
  71   ConstrainedWebDialogDelegate* GetConstrainedDelegate();
  72
  73  private:
  74   // JS Message Handler
  75   void OnDialogCloseMessage(const base::ListValue* args);
  76
  77   DISALLOW_COPY_AND_ASSIGN(ConstrainedWebDialogUI);
  78 };
  79
  80 // Create a constrained HTML dialog. The actual object that gets created
  81 // is a ConstrainedWebDialogDelegate, which later triggers construction of a
  82 // ConstrainedWebDialogUI object.
  83 // |browser_context| is used to construct the constrained HTML dialog's
  84 //                   WebContents.
  85 // |delegate| controls the behavior of the dialog.
  86 // |tab_delegate| is optional, pass one in to use a custom
  87 //                WebDialogWebContentsDelegate with the dialog, or NULL to
  88 //                use the default one. The dialog takes ownership of
  89 //                |tab_delegate|.
  90 // |overshadowed| is the tab being overshadowed by the dialog.
  91 ConstrainedWebDialogDelegate* CreateConstrainedWebDialog(
  92     content::BrowserContext* browser_context,
  93     ui::WebDialogDelegate* delegate,
  94     ui::WebDialogWebContentsDelegate* tab_delegate,
  95     content::WebContents* overshadowed);
  96
  97 #endif  // CHROME_BROWSER_UI_WEBUI_CONSTRAINED_WEB_DIALOG_UI_H_