link_disambiguation_popup.h revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
1// Copyright (c) 2014 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_VIEWS_LINK_DISAMBIGUATION_LINK_DISAMBIGUATION_POPUP_H_
6#define CHROME_BROWSER_UI_VIEWS_LINK_DISAMBIGUATION_LINK_DISAMBIGUATION_POPUP_H_
7
8#include "content/public/browser/web_contents_view_delegate.h"
9#include "ui/gfx/geometry/rect.h"
10
11namespace aura {
12class Window;
13}
14
15namespace ui {
16class MouseEvent;
17}
18
19// Creates a popup with a zoomed bitmap rendered by Blink of an area in web
20// |content| that received an ambiguous Gesture event. This allows the user to
21// select which of the links their first Gesture event overlapped. The popup
22// generates a new Gesture event which is sent back to the provided |callback|.
23class LinkDisambiguationPopup {
24 public:
25  LinkDisambiguationPopup();
26  ~LinkDisambiguationPopup();
27
28  // Creates and shows the Popup. |zoomed_bitmap| is the scaled-up image of the
29  // ambiguous web content. |target_rect| is the original, unzoomed rectangle
30  // in DIPs in the coordinate system of |content|. We will convert received
31  // gestures in the popup to the coordinate system of |content| and as an
32  // offset within |target_rect|, and then call the |callback| with the
33  // transformed coordinates GestureEvent.
34  void Show(const SkBitmap& zoomed_bitmap,
35            const gfx::Rect& target_rect,
36            const gfx::NativeView content,
37            const base::Callback<void(ui::GestureEvent*)>& gesture_cb,
38            const base::Callback<void(ui::MouseEvent*)>& mouse_cb);
39  void Close();
40
41 private:
42  class ZoomBubbleView;
43
44  // It is possible that |view_| can be destroyed by its widget instead of
45  // closed explicitly by us. In that case we need to be notified that it has
46  // been destroyed so we can invalidate our own pointer to that view.
47  void InvalidateBubbleView();
48
49  // A non-owning pointer to the calling window that contains the unzoomed web
50  // content bitmap, that we will be sending the GestureEvents received back to.
51  const aura::Window* content_;
52  ZoomBubbleView* view_;
53
54  DISALLOW_COPY_AND_ASSIGN(LinkDisambiguationPopup);
55};
56
57#endif  // CHROME_BROWSER_UI_VIEWS_LINK_DISAMBIGUATION_LINK_DISAMBIGUATION_POPUP_H_
58