content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h

   1 // Copyright 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_DICTIONARY_HELPER_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_DICTIONARY_HELPER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "ui/gfx/vector2d.h"
  10
  11 namespace content {
  12
  13 class RenderWidgetHostView;
  14 class RenderWidgetHostViewMac;
  15 class RenderWidgetHostViewPort;
  16
  17 // A helper class to bring up definition of word for a RWHV.
  18 //
  19 // This is triggered by "Lookup in Dictionary" context menu item.
  20 // Either uses Dictionary.app or a light-weight dictionary panel, based on
  21 // system settings.
  22 class RenderWidgetHostViewMacDictionaryHelper {
  23  public:
  24   explicit RenderWidgetHostViewMacDictionaryHelper(
  25       RenderWidgetHostViewPort* view);
  26
  27   // Overrides the view to use to bring up dictionary panel.
  28   // This |target_view| can be different from |view_|, |view_| is used to get
  29   // the current selection value where |target_view| is used to bring up the
  30   // cocoa dictionary panel.
  31   void SetTargetView(RenderWidgetHostView* target_view);
  32   void set_offset(const gfx::Vector2d& offset) { offset_ = offset; }
  33
  34   // Brings up either Dictionary.app or a light-weight dictionary panel,
  35   // depending on system settings.
  36   void ShowDefinitionForSelection();
  37
  38  private:
  39   // This class shows definition for this view.
  40   RenderWidgetHostViewMac* view_;
  41   // This view is use to bring up the dictionary panel. Generally this is the
  42   // same as |view_|. One can override the view to use via SetTargetView().
  43   RenderWidgetHostViewMac* target_view_;
  44   // The extra offset to use while positioning the dicitonary panel.
  45   gfx::Vector2d offset_;
  46
  47   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewMacDictionaryHelper);
  48 };
  49
  50 }  // namespace content
  51
  52 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_MAC_DICTIONARY_HELPER_H_