96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
// Copyright (c) 2013 The Chromium Embedded Framework Authors.
|
|
// Portions 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 CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
|
|
#define CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
|
|
|
|
#include <gtk/gtk.h>
|
|
#include "base/memory/ref_counted.h"
|
|
#include "base/memory/scoped_ptr.h"
|
|
#include "base/memory/weak_ptr.h"
|
|
#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
|
|
#include "ui/base/gtk/gtk_signal.h"
|
|
|
|
class BrowserWebViewDelegate;
|
|
class CefBrowserImpl;
|
|
class WebDropData;
|
|
|
|
namespace WebKit {
|
|
class WebView;
|
|
}
|
|
|
|
class WebDropTarget : public base::RefCounted<WebDropTarget> {
|
|
public:
|
|
explicit WebDropTarget(CefBrowserImpl* browser);
|
|
virtual ~WebDropTarget();
|
|
|
|
// Informs the renderer when a system drag has left the render view.
|
|
void DragLeave();
|
|
|
|
private:
|
|
WebKit::WebView* getView();
|
|
|
|
// This is called when the renderer responds to a drag motion event. We must
|
|
// update the system drag cursor.
|
|
void UpdateDragStatus(WebKit::WebDragOperation operation, gint time);
|
|
|
|
// Called when a system drag crosses over the render view. As there is no drag
|
|
// enter event, we treat it as an enter event (and not a regular motion event)
|
|
// when |context_| is NULL.
|
|
CHROMEGTK_CALLBACK_4(WebDropTarget, gboolean, OnDragMotion, GdkDragContext*,
|
|
gint, gint, guint);
|
|
|
|
// We make a series of requests for the drag data when the drag first enters
|
|
// the render view. This is the callback that is used to give us the data
|
|
// for each individual target. When |data_requests_| reaches 0, we know we
|
|
// have attained all the data, and we can finally tell the renderer about the
|
|
// drag.
|
|
CHROMEGTK_CALLBACK_6(WebDropTarget, void, OnDragDataReceived,
|
|
GdkDragContext*, gint, gint, GtkSelectionData*,
|
|
guint, guint);
|
|
|
|
// The drag has left our widget; forward this information to the renderer.
|
|
CHROMEGTK_CALLBACK_2(WebDropTarget, void, OnDragLeave, GdkDragContext*,
|
|
guint);
|
|
|
|
// Called by GTK when the user releases the mouse, executing a drop.
|
|
CHROMEGTK_CALLBACK_4(WebDropTarget, gboolean, OnDragDrop, GdkDragContext*,
|
|
gint, gint, guint);
|
|
|
|
CefBrowserImpl* browser_;
|
|
|
|
// The render view.
|
|
GtkWidget* widget_;
|
|
|
|
// The current drag context for system drags over our render view, or NULL if
|
|
// there is no system drag or the system drag is not over our render view.
|
|
GdkDragContext* context_;
|
|
|
|
// The data for the current drag, or NULL if |context_| is NULL.
|
|
scoped_ptr<WebDropData> drop_data_;
|
|
|
|
// The number of outstanding drag data requests we have sent to the drag
|
|
// source.
|
|
int data_requests_;
|
|
|
|
// Whether the cursor is over a drop target, according to the last message we
|
|
// got from the renderer.
|
|
bool is_drop_target_;
|
|
|
|
// Handler ID for the destroy signal handler. We connect to the destroy
|
|
// signal handler so that we won't call dest_unset on it after it is
|
|
// destroyed, but we have to cancel the handler if we are destroyed before
|
|
// |widget_| is.
|
|
int destroy_handler_;
|
|
|
|
// Whether the drag enter event was sent to the renderer.
|
|
bool sent_drag_enter_;
|
|
|
|
base::WeakPtrFactory<WebDropTarget> method_factory_;
|
|
};
|
|
|
|
#endif // CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
|
|
|