components/web_modal/web_contents_modal_dialog_host.h

   1 // Copyright (c) 2013 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 COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_HOST_H_
   6 #define COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_HOST_H_
   7
   8 #include "ui/gfx/native_widget_types.h"
   9 #include "ui/gfx/point.h"
  10 #include "ui/gfx/size.h"
  11
  12 namespace web_modal {
  13
  14 // Observer to be implemented to update web contents modal dialogs when the host
  15 // indicates their position needs to be changed.
  16 class WebContentsModalDialogHostObserver {
  17  public:
  18   virtual ~WebContentsModalDialogHostObserver();
  19
  20   virtual void OnPositionRequiresUpdate() = 0;
  21   virtual void OnHostDestroying() = 0;
  22
  23  protected:
  24   WebContentsModalDialogHostObserver();
  25
  26  private:
  27   DISALLOW_COPY_AND_ASSIGN(WebContentsModalDialogHostObserver);
  28 };
  29
  30 // Interface for supporting positioning of web contents modal dialogs over a
  31 // window/widget.
  32 class WebContentsModalDialogHost {
  33  public:
  34   virtual ~WebContentsModalDialogHost();
  35
  36   // Returns the view against which the dialog is positioned and parented.
  37   virtual gfx::NativeView GetHostView() const = 0;
  38   // Gets the position for the dialog in coordinates relative to the host
  39   // view.
  40   virtual gfx::Point GetDialogPosition(const gfx::Size& size) = 0;
  41
  42   // Add/remove observer.
  43   virtual void AddObserver(WebContentsModalDialogHostObserver* observer) = 0;
  44   virtual void RemoveObserver(WebContentsModalDialogHostObserver* observer) = 0;
  45
  46  protected:
  47   WebContentsModalDialogHost();
  48
  49  private:
  50   DISALLOW_COPY_AND_ASSIGN(WebContentsModalDialogHost);
  51 };
  52
  53 }  // namespace web_modal
  54
  55 #endif  // COMPONENTS_WEB_MODAL_WEB_CONTENTS_MODAL_DIALOG_HOST_H_