content/browser/renderer_host/render_view_host_delegate_view.h

   1 // Copyright (c) 2012 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_VIEW_HOST_DELEGATE_VIEW_H_
   6 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_VIEW_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/callback.h"
  12 #include "content/common/content_export.h"
  13 #include "content/common/drag_event_source_info.h"
  14 #include "third_party/WebKit/public/web/WebDragOperation.h"
  15
  16 class SkBitmap;
  17
  18 namespace gfx {
  19 class ImageSkia;
  20 class Rect;
  21 class Vector2d;
  22 }
  23
  24 namespace ui {
  25 class GestureEvent;
  26 class MouseEvent;
  27 }
  28
  29 namespace content {
  30 class RenderFrameHost;
  31 struct ContextMenuParams;
  32 struct DropData;
  33 struct MenuItem;
  34
  35 // This class provides a way for the RenderViewHost to reach out to its
  36 // delegate's view. It only needs to be implemented by embedders if they don't
  37 // use the default WebContentsView implementations.
  38 class CONTENT_EXPORT RenderViewHostDelegateView {
  39  public:
  40   // A context menu should be shown, to be built using the context information
  41   // provided in the supplied params.
  42   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
  43                                const ContextMenuParams& params) {}
  44
  45   // The user started dragging content of the specified type within the
  46   // RenderView. Contextual information about the dragged content is supplied
  47   // by DropData. If the delegate's view cannot start the drag for /any/
  48   // reason, it must inform the renderer that the drag has ended; otherwise,
  49   // this results in bugs like http://crbug.com/157134.
  50   virtual void StartDragging(const DropData& drop_data,
  51                              blink::WebDragOperationsMask allowed_ops,
  52                              const gfx::ImageSkia& image,
  53                              const gfx::Vector2d& image_offset,
  54                              const DragEventSourceInfo& event_info) {}
  55
  56   // The page wants to update the mouse cursor during a drag & drop operation.
  57   // |operation| describes the current operation (none, move, copy, link.)
  58   virtual void UpdateDragCursor(blink::WebDragOperation operation) {}
  59
  60   // Notification that view for this delegate got the focus.
  61   virtual void GotFocus() {}
  62
  63   // Callback to inform the browser that the page is returning the focus to
  64   // the browser's chrome. If reverse is true, it means the focus was
  65   // retrieved by doing a Shift-Tab.
  66   virtual void TakeFocus(bool reverse) {}
  67
  68 #if defined(OS_MACOSX) || defined(OS_ANDROID)
  69   // Shows a popup menu with the specified items.
  70   // This method should call RenderFrameHost::DidSelectPopupMenuItem[s]() or
  71   // RenderFrameHost::DidCancelPopupMenu() based on the user action.
  72   virtual void ShowPopupMenu(RenderFrameHost* render_frame_host,
  73                              const gfx::Rect& bounds,
  74                              int item_height,
  75                              double item_font_size,
  76                              int selected_item,
  77                              const std::vector<MenuItem>& items,
  78                              bool right_aligned,
  79                              bool allow_multiple_selection) {};
  80
  81   // Hides a popup menu opened by ShowPopupMenu().
  82   virtual void HidePopupMenu() {};
  83 #endif
  84
  85 #if defined(TOOLKIT_VIEWS) || defined(USE_AURA)
  86   // Shows a Link Disambiguation Popup. |target_rect| is the area the user
  87   // touched that resulted in ambiguity, in DIPs in the host's coordinate
  88   // system, |zoomed_bitmap| is an enlarged image of that |target_rect|, and
  89   // |callback| is for forwarding on to the original scale web content.
  90   virtual void ShowDisambiguationPopup(
  91       const gfx::Rect& target_rect,
  92       const SkBitmap& zoomed_bitmap,
  93       const base::Callback<void(ui::GestureEvent*)>& gesture_cb,
  94       const base::Callback<void(ui::MouseEvent*)>& mouse_cb) {}
  95
  96   // Hides the Link Disambiguation Popup, if it was showing, otherwise does
  97   // nothing.
  98   virtual void HideDisambiguationPopup() {}
  99 #endif
 100
 101  protected:
 102   virtual ~RenderViewHostDelegateView() {}
 103 };
 104
 105 }  // namespace content
 106
 107 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_VIEW_H_