chrome/browser/ui/views/link_disambiguation/link_disambiguation_popup.h

   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
  11 namespace aura {
  12 class Window;
  13 }
  14
  15 namespace ui {
  16 class 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|.
  23 class 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_