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      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 "content/common/content_export.h"
     12 #include "content/common/drag_event_source_info.h"
     13 #include "third_party/WebKit/public/web/WebDragOperation.h"
     14 
     15 class SkBitmap;
     16 
     17 namespace gfx {
     18 class ImageSkia;
     19 class Rect;
     20 class Vector2d;
     21 }
     22 
     23 namespace content {
     24 class RenderFrameHost;
     25 struct ContextMenuParams;
     26 struct DropData;
     27 struct MenuItem;
     28 
     29 // This class provides a way for the RenderViewHost to reach out to its
     30 // delegate's view. It only needs to be implemented by embedders if they don't
     31 // use the default WebContentsView implementations.
     32 class CONTENT_EXPORT RenderViewHostDelegateView {
     33  public:
     34   // A context menu should be shown, to be built using the context information
     35   // provided in the supplied params.
     36   virtual void ShowContextMenu(RenderFrameHost* render_frame_host,
     37                                const ContextMenuParams& params) {}
     38 
     39   // Shows a popup menu with the specified items.
     40   // This method should call RenderViewHost::DidSelectPopupMenuItem[s]() or
     41   // RenderViewHost::DidCancelPopupMenu() based on the user action.
     42   virtual void ShowPopupMenu(const gfx::Rect& bounds,
     43                              int item_height,
     44                              double item_font_size,
     45                              int selected_item,
     46                              const std::vector<MenuItem>& items,
     47                              bool right_aligned,
     48                              bool allow_multiple_selection) {};
     49 
     50   // Hides a popup menu opened by ShowPopupMenu().
     51   virtual void HidePopupMenu() {};
     52 
     53   // The user started dragging content of the specified type within the
     54   // RenderView. Contextual information about the dragged content is supplied
     55   // by DropData. If the delegate's view cannot start the drag for /any/
     56   // reason, it must inform the renderer that the drag has ended; otherwise,
     57   // this results in bugs like http://crbug.com/157134.
     58   virtual void StartDragging(const DropData& drop_data,
     59                              blink::WebDragOperationsMask allowed_ops,
     60                              const gfx::ImageSkia& image,
     61                              const gfx::Vector2d& image_offset,
     62                              const DragEventSourceInfo& event_info) {}
     63 
     64   // The page wants to update the mouse cursor during a drag & drop operation.
     65   // |operation| describes the current operation (none, move, copy, link.)
     66   virtual void UpdateDragCursor(blink::WebDragOperation operation) {}
     67 
     68   // Notification that view for this delegate got the focus.
     69   virtual void GotFocus() {}
     70 
     71   // Callback to inform the browser that the page is returning the focus to
     72   // the browser's chrome. If reverse is true, it means the focus was
     73   // retrieved by doing a Shift-Tab.
     74   virtual void TakeFocus(bool reverse) {}
     75 
     76  protected:
     77   virtual ~RenderViewHostDelegateView() {}
     78 };
     79 
     80 }  // namespace content
     81 
     82 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_VIEW_H_
     83