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 #include "ui/views/widget/widget.h"
  11
  12 namespace aura {
  13 class Window;
  14 }
  15
  16 namespace ui {
  17 class MouseEvent;
  18 }
  19
  20 // Creates a popup with a zoomed bitmap rendered by Blink of an area in web
  21 // |content| that received an ambiguous Gesture event. This allows the user to
  22 // select which of the links their first Gesture event overlapped. The popup
  23 // generates a new Gesture event which is sent back to the provided |callback|.
  24 class LinkDisambiguationPopup {
  25  public:
  26   LinkDisambiguationPopup();
  27   ~LinkDisambiguationPopup();
  28
  29   // Creates and shows the Popup. |top_level_widget| is the active widget.
  30   // |zoomed_bitmap| is the scaled-up image of the ambiguous web content.
  31   // |target_rect| is the original, unzoomed rectangle in DIPs in the
  32   // coordinate system of |content|. We will convert received
  33   // gestures in the popup to the coordinate system of |content| and as an
  34   // offset within |target_rect|, and then call the |callback| with the
  35   // transformed coordinates GestureEvent.
  36   void Show(views::Widget* top_level_widget,
  37             const SkBitmap& zoomed_bitmap,
  38             const gfx::Rect& target_rect,
  39             const gfx::NativeView content,
  40             const base::Callback<void(ui::GestureEvent*)>& gesture_cb,
  41             const base::Callback<void(ui::MouseEvent*)>& mouse_cb);
  42   void Close();
  43
  44  private:
  45   class ZoomBubbleView;
  46
  47   // It is possible that |view_| can be destroyed by its widget instead of
  48   // closed explicitly by us. In that case we need to be notified that it has
  49   // been destroyed so we can invalidate our own pointer to that view.
  50   void InvalidateBubbleView();
  51
  52   // A non-owning pointer to the calling window that contains the unzoomed web
  53   // content bitmap, that we will be sending the GestureEvents received back to.
  54   const aura::Window* content_;
  55   ZoomBubbleView* view_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(LinkDisambiguationPopup);
  58 };
  59
  60 #endif  // CHROME_BROWSER_UI_VIEWS_LINK_DISAMBIGUATION_LINK_DISAMBIGUATION_POPUP_H_