webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 94 insertions, 0 deletions

diff --git a/Source/WebKit2/UIProcess/gtk/DragAndDropHandler.h b/Source/WebKit2/UIProcess/gtk/DragAndDropHandler.h
new file mode 100644
index 000000000..1c1ea3a93
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+++ b/Source/WebKit2/UIProcess/gtk/DragAndDropHandler.h
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+/*
+ * Copyright (C) 2014 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#if ENABLE(DRAG_SUPPORT)
+
+#include <WebCore/DragActions.h>
+#include <WebCore/IntPoint.h>
+#include <WebCore/SelectionData.h>
+#include <gtk/gtk.h>
+#include <wtf/HashMap.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/glib/GRefPtr.h>
+
+typedef struct _GdkDragContext GdkDragContext;
+typedef struct _GtkSelectionData GtkSelectionData;
+
+namespace WebCore {
+class DragData;
+class SelectionData;
+}
+
+namespace WebKit {
+
+class ShareableBitmap;
+class WebPageProxy;
+
+class DragAndDropHandler {
+    WTF_MAKE_NONCOPYABLE(DragAndDropHandler);
+public:
+    DragAndDropHandler(WebPageProxy&);
+
+    void startDrag(Ref<WebCore::SelectionData>&&, WebCore::DragOperation, RefPtr<ShareableBitmap>&& dragImage);
+    void fillDragData(GdkDragContext*, GtkSelectionData*, unsigned info);
+    void finishDrag(GdkDragContext*);
+
+    void dragEntered(GdkDragContext*, GtkSelectionData*, unsigned info, unsigned time);
+    void dragMotion(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
+    void dragLeave(GdkDragContext*);
+    bool drop(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
+
+private:
+    struct DroppingContext {
+        DroppingContext(GdkDragContext*, const WebCore::IntPoint& position);
+
+        GdkDragContext* gdkContext { nullptr };
+        WebCore::IntPoint lastMotionPosition;
+        Ref<WebCore::SelectionData> selectionData;
+        unsigned pendingDataRequests { 0 };
+        bool dropHappened { false };
+    };
+
+    WebCore::SelectionData* dropDataSelection(GdkDragContext*, GtkSelectionData*, unsigned info, WebCore::IntPoint& position);
+    WebCore::SelectionData* dragDataSelection(GdkDragContext*, const WebCore::IntPoint& position, unsigned time);
+
+    WebPageProxy& m_page;
+    HashMap<GdkDragContext*, std::unique_ptr<DroppingContext>> m_droppingContexts;
+
+#if GTK_CHECK_VERSION(3, 16, 0)
+    GRefPtr<GdkDragContext> m_dragContext;
+    RefPtr<WebCore::SelectionData> m_draggingSelectionData;
+#else
+    // We don't have gtk_drag_cancel() in GTK+ < 3.16, so we use the old code.
+    // See https://bugs.webkit.org/show_bug.cgi?id=138468
+    HashMap<GdkDragContext*, RefPtr<WebCore::SelectionData>> m_draggingSelectionDataMap;
+#endif
+};
+
+} // namespace WebKit
+
+#endif // ENABLE(DRAG_SUPPORT)