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// Copyright (c) 2012 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 CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_
#define CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_
#pragma once
#include <gtk/gtk.h>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/message_loop.h"
#include "base/string16.h"
#include "content/common/content_export.h"
#include "googleurl/src/gurl.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
#include "ui/base/gtk/gtk_signal.h"
#include "ui/base/gtk/gtk_signal_registrar.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/gfx/point.h"
class SkBitmap;
struct WebDropData;
namespace content {
class RenderViewHostImpl;
class WebContents;
// WebDragSourceGtk takes care of managing the drag from a WebContents
// with Gtk.
class CONTENT_EXPORT WebDragSourceGtk : public MessageLoopForUI::Observer {
public:
explicit WebDragSourceGtk(WebContents* web_contents);
virtual ~WebDragSourceGtk();
// Starts a drag for the WebContents this WebDragSourceGtk was created for.
void StartDragging(const WebDropData& drop_data,
WebKit::WebDragOperationsMask allowed_ops,
GdkEventButton* last_mouse_down,
const SkBitmap& image,
const gfx::Point& image_offset);
// MessageLoop::Observer implementation:
virtual void WillProcessEvent(GdkEvent* event) OVERRIDE;
virtual void DidProcessEvent(GdkEvent* event) OVERRIDE;
private:
CHROMEGTK_CALLBACK_2(WebDragSourceGtk, gboolean, OnDragFailed,
GdkDragContext*, GtkDragResult);
CHROMEGTK_CALLBACK_1(WebDragSourceGtk, void, OnDragBegin,
GdkDragContext*);
CHROMEGTK_CALLBACK_1(WebDragSourceGtk, void, OnDragEnd,
GdkDragContext*);
CHROMEGTK_CALLBACK_4(WebDragSourceGtk, void, OnDragDataGet,
GdkDragContext*, GtkSelectionData*, guint, guint);
CHROMEGTK_CALLBACK_1(WebDragSourceGtk, gboolean, OnDragIconExpose,
GdkEventExpose*);
content::RenderViewHostImpl* GetRenderViewHost() const;
gfx::NativeView GetContentNativeView() const;
// The tab we're manging the drag for.
content::WebContents* web_contents_;
// The drop data for the current drag (for drags that originate in the render
// view). Non-NULL iff there is a current drag.
scoped_ptr<WebDropData> drop_data_;
// The image used for depicting the drag, and the offset between the cursor
// and the top left pixel.
GdkPixbuf* drag_pixbuf_;
gfx::Point image_offset_;
// The mime type for the file contents of the current drag (if any).
GdkAtom drag_file_mime_type_;
// Whether the current drag has failed. Meaningless if we are not the source
// for a current drag.
bool drag_failed_;
// This is the widget we use to initiate drags. Since we don't use the
// renderer widget, we can persist drags even when our contents is switched
// out. We can't use an OwnedWidgetGtk because the GtkInvisible widget
// initialization code sinks the reference.
GtkWidget* drag_widget_;
// Context created once drag starts. A NULL value indicates that there is
// no drag currently in progress.
GdkDragContext* drag_context_;
// The file mime type for a drag-out download.
string16 wide_download_mime_type_;
// The file name to be saved to for a drag-out download.
FilePath download_file_name_;
// The URL to download from for a drag-out download.
GURL download_url_;
// The widget that provides visual feedback for the drag. We can't use
// an OwnedWidgetGtk because the GtkWindow initialization code sinks
// the reference.
GtkWidget* drag_icon_;
ui::GtkSignalRegistrar signals_;
DISALLOW_COPY_AND_ASSIGN(WebDragSourceGtk);
};
} // namespace content
#endif // CONTENT_BROWSER_WEB_CONTENTS_WEB_DRAG_SOURCE_GTK_H_
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