1/*
2 * Copyright (C) 2014 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#if ENABLE(DRAG_SUPPORT)
29
30#include <WebCore/DragActions.h>
31#include <WebCore/IntPoint.h>
32#include <WebCore/SelectionData.h>
33#include <gtk/gtk.h>
34#include <wtf/HashMap.h>
35#include <wtf/Noncopyable.h>
36#include <wtf/glib/GRefPtr.h>
37
38typedef struct _GdkDragContext GdkDragContext;
39typedef struct _GtkSelectionData GtkSelectionData;
40
41namespace WebCore {
42class DragData;
43class SelectionData;
44}
45
46namespace WebKit {
47
48class ShareableBitmap;
49class WebPageProxy;
50
51class DragAndDropHandler {
52 WTF_MAKE_NONCOPYABLE(DragAndDropHandler);
53public:
54 DragAndDropHandler(WebPageProxy&);
55
56 void startDrag(Ref<WebCore::SelectionData>&&, WebCore::DragOperation, RefPtr<ShareableBitmap>&& dragImage);
57 void fillDragData(GdkDragContext*, GtkSelectionData*, unsigned info);
58 void finishDrag(GdkDragContext*);
59
60 void dragEntered(GdkDragContext*, GtkSelectionData*, unsigned info, unsigned time);
61 void dragMotion(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
62 void dragLeave(GdkDragContext*);
63 bool drop(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
64
65private:
66 struct DroppingContext {
67 DroppingContext(GdkDragContext*, const WebCore::IntPoint& position);
68
69 GdkDragContext* gdkContext { nullptr };
70 WebCore::IntPoint lastMotionPosition;
71 Ref<WebCore::SelectionData> selectionData;
72 unsigned pendingDataRequests { 0 };
73 bool dropHappened { false };
74 };
75
76 WebCore::SelectionData* dropDataSelection(GdkDragContext*, GtkSelectionData*, unsigned info, WebCore::IntPoint& position);
77 WebCore::SelectionData* dragDataSelection(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
78
79 WebPageProxy& m_page;
80 HashMap<GdkDragContext*, std::unique_ptr<DroppingContext>> m_droppingContexts;
81
82#if GTK_CHECK_VERSION(3, 16, 0)
83 GRefPtr<GdkDragContext> m_dragContext;
84 RefPtr<WebCore::SelectionData> m_draggingSelectionData;
85#else
86 // We don't have gtk_drag_cancel() in GTK+ < 3.16, so we use the old code.
87 // See https://bugs.webkit.org/show_bug.cgi?id=138468
88 HashMap<GdkDragContext*, RefPtr<WebCore::SelectionData>> m_draggingSelectionDataMap;
89#endif
90};
91
92} // namespace WebKit
93
94#endif // ENABLE(DRAG_SUPPORT)
95