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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_DRAG_SOURCE_H_
#define CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_SOURCE_H_
#include "app/gfx/native_widget_types.h"
#include "base/basictypes.h"
#include "base/gfx/point.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
// TODO(port): Port this file.
#if defined(OS_WIN)
#include "base/base_drag_source.h"
#else
#include "chrome/common/temp_scaffolding_stubs.h"
#endif
class RenderViewHost;
class TabContents;
///////////////////////////////////////////////////////////////////////////////
//
// WebDragSource
//
// An IDropSource implementation for a TabContents. Handles notifications sent
// by an active drag-drop operation as the user mouses over other drop targets
// on their system. This object tells Windows whether or not the drag should
// continue, and supplies the appropriate cursors.
//
class WebDragSource : public BaseDragSource,
public NotificationObserver {
public:
// Create a new DragSource for a given HWND and TabContents.
WebDragSource(gfx::NativeWindow source_wnd, TabContents* tab_contents);
virtual ~WebDragSource() { }
// NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
protected:
// BaseDragSource
virtual void OnDragSourceCancel();
virtual void OnDragSourceDrop();
virtual void OnDragSourceMove();
private:
// Cannot construct thusly.
WebDragSource();
// Keep a reference to the window so we can translate the cursor position.
gfx::NativeWindow source_wnd_;
// We use this as a channel to the renderer to tell it about various drag
// drop events that it needs to know about (such as when a drag operation it
// initiated terminates).
RenderViewHost* render_view_host_;
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(WebDragSource);
};
#endif // CHROME_BROWSER_TAB_CONTENTS_WEB_DRAG_SOURCE_H_
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