Support dragging a virtual file out of the browser.

base/base_drop_target.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_BASE_DROP_TARGET_H_
 #define BASE_BASE_DROP_TARGET_H_
 
 #include <objidl.h>
 
 #include "base/ref_counted.h"
 
 struct IDropTargetHelper;
 
 // A DropTarget implementation that takes care of the nitty gritty
 // of dnd. While this class is concrete, subclasses will most likely
 // want to override various OnXXX methods.
 //
 // Because BaseDropTarget is ref counted you shouldn't delete it directly,
 // rather wrap it in a scoped_refptr. Be sure and invoke RevokeDragDrop(m_hWnd)
 // before the HWND is deleted too.
 //
 // This class is meant to be used in a STA and is not multithread-safe.
 class BaseDropTarget : public IDropTarget {
  public:
   // Create a new BaseDropTarget associating it with the given HWND.
   explicit BaseDropTarget(HWND hwnd);
   virtual ~BaseDropTarget();
 
-  // When suspend is set to |true|, the drop target does not receive drops from
-  // drags initiated within the owning HWND.
+  // When suspended is set to |true|, the drop target does not receive drops
+  // from drags initiated within the owning HWND.
   // TODO(beng): (http://b/1085385) figure out how we will handle legitimate
   //             drag-drop operations within the same HWND, such as dragging
   //             selected text to an edit field.
-  void set_suspend(bool suspend) { suspend_ = suspend; }
+  bool suspended() const { return suspended_; }
+  void set_suspended(bool suspended) { suspended_ = suspended; }
 
   // IDropTarget implementation:
   HRESULT __stdcall DragEnter(IDataObject* data_object,
                               DWORD key_state,
                               POINTL cursor_position,
                               DWORD* effect);
   HRESULT __stdcall DragOver(DWORD key_state,
                              POINTL cursor_position,
                              DWORD* effect);
   HRESULT __stdcall DragLeave();
@@ skipping 68 matching lines @@
   // is passed over the renderer NPAPI interface to gears, so use int32 instead
   // of int here.
   static int32 drag_identity_;
 
   // The HWND of the source. This HWND is used to determine coordinates for
   // mouse events that are sent to the renderer notifying various drag states.
   HWND hwnd_;
 
   // Whether or not we are currently processing drag notifications for drags
   // initiated in this window.
-  bool suspend_;
+  bool suspended_;
 
   LONG ref_count_;
 
   DISALLOW_EVIL_CONSTRUCTORS(BaseDropTarget);
 };
 
 #endif  // BASE_BASE_DROP_TARGET_H_