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// 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 CHROME_BROWSER_TAB_CONTENTS_WEB_DROP_TARGET_H_
#define CHROME_BROWSER_TAB_CONTENTS_WEB_DROP_TARGET_H_
#include "base/base_drop_target.h"
#include "base/scoped_ptr.h"
class InterstitialDropTarget;
class RenderViewHost;
class WebContents;
///////////////////////////////////////////////////////////////////////////////
//
// WebDropTarget
//
// A helper object that provides drop capabilities to a WebContents. The
// DropTarget handles drags that enter the region of the WebContents by
// passing on the events to the renderer.
//
class WebDropTarget : public BaseDropTarget {
public:
// Create a new WebDropTarget associating it with the given HWND and
// WebContents.
WebDropTarget(HWND source_hwnd, WebContents* contents);
virtual ~WebDropTarget();
void set_is_drop_target(bool is_drop_target) {
is_drop_target_ = is_drop_target;
}
protected:
virtual DWORD OnDragEnter(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect);
virtual DWORD OnDragOver(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect);
virtual void OnDragLeave(IDataObject* data_object);
virtual DWORD OnDrop(IDataObject* data_object,
DWORD key_state,
POINT cursor_position,
DWORD effect);
private:
// Our associated WebContents.
WebContents* web_contents_;
// We keep track of the render view host we're dragging over. If it changes
// during a drag, we need to re-send the DragEnter message. WARNING:
// this pointer should never be dereferenced. We only use it for comparing
// pointers.
RenderViewHost* current_rvh_;
// Used to determine what cursor we should display when dragging over web
// content area. This can be updated async during a drag operation.
bool is_drop_target_;
// A special drop target handler for when we try to d&d while an interstitial
// page is showing.
scoped_ptr<InterstitialDropTarget> interstitial_drop_target_;
DISALLOW_EVIL_CONSTRUCTORS(WebDropTarget);
};
#endif // #ifndef CHROME_BROWSER_TAB_CONTENTS_WEB_DROP_TARGET_H_
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