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6983ac5ae3
git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1074 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
96 lines
3.3 KiB
C++
96 lines
3.3 KiB
C++
// Copyright (c) 2013 The Chromium Embedded Framework Authors.
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// Portions copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
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#define CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
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#include <gtk/gtk.h>
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#include "base/memory/ref_counted.h"
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#include "base/memory/scoped_ptr.h"
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#include "base/memory/weak_ptr.h"
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#include "third_party/WebKit/Source/WebKit/chromium/public/WebDragOperation.h"
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#include "ui/base/gtk/gtk_signal.h"
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class BrowserWebViewDelegate;
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class CefBrowserImpl;
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class WebDropData;
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namespace WebKit {
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class WebView;
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}
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class WebDropTarget : public base::RefCounted<WebDropTarget> {
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public:
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explicit WebDropTarget(CefBrowserImpl* browser);
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virtual ~WebDropTarget();
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// Informs the renderer when a system drag has left the render view.
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void DragLeave();
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private:
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WebKit::WebView* getView();
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// This is called when the renderer responds to a drag motion event. We must
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// update the system drag cursor.
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void UpdateDragStatus(WebKit::WebDragOperation operation, gint time);
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// Called when a system drag crosses over the render view. As there is no drag
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// enter event, we treat it as an enter event (and not a regular motion event)
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// when |context_| is NULL.
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CHROMEGTK_CALLBACK_4(WebDropTarget, gboolean, OnDragMotion, GdkDragContext*,
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gint, gint, guint);
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// We make a series of requests for the drag data when the drag first enters
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// the render view. This is the callback that is used to give us the data
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// for each individual target. When |data_requests_| reaches 0, we know we
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// have attained all the data, and we can finally tell the renderer about the
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// drag.
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CHROMEGTK_CALLBACK_6(WebDropTarget, void, OnDragDataReceived,
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GdkDragContext*, gint, gint, GtkSelectionData*,
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guint, guint);
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// The drag has left our widget; forward this information to the renderer.
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CHROMEGTK_CALLBACK_2(WebDropTarget, void, OnDragLeave, GdkDragContext*,
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guint);
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// Called by GTK when the user releases the mouse, executing a drop.
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CHROMEGTK_CALLBACK_4(WebDropTarget, gboolean, OnDragDrop, GdkDragContext*,
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gint, gint, guint);
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CefBrowserImpl* browser_;
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// The render view.
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GtkWidget* widget_;
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// The current drag context for system drags over our render view, or NULL if
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// there is no system drag or the system drag is not over our render view.
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GdkDragContext* context_;
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// The data for the current drag, or NULL if |context_| is NULL.
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scoped_ptr<WebDropData> drop_data_;
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// The number of outstanding drag data requests we have sent to the drag
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// source.
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int data_requests_;
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// Whether the cursor is over a drop target, according to the last message we
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// got from the renderer.
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bool is_drop_target_;
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// Handler ID for the destroy signal handler. We connect to the destroy
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// signal handler so that we won't call dest_unset on it after it is
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// destroyed, but we have to cancel the handler if we are destroyed before
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// |widget_| is.
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int destroy_handler_;
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// Whether the drag enter event was sent to the renderer.
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bool sent_drag_enter_;
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base::WeakPtrFactory<WebDropTarget> method_factory_;
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};
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#endif // CEF_LIBCEF_WEB_DROP_TARGET_GTK_H_
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