webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 70 insertions, 0 deletions

diff --git a/Source/WebCore/page/scrolling/ScrollLatchingState.h b/Source/WebCore/page/scrolling/ScrollLatchingState.h
new file mode 100644
index 000000000..11dcbd0db
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+++ b/Source/WebCore/page/scrolling/ScrollLatchingState.h
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+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * 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. ``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
+ * 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
+
+#include <wtf/RefPtr.h>
+
+namespace WebCore {
+
+class ContainerNode;
+class Element;
+class Frame;
+
+class ScrollLatchingState final {
+public:
+    ScrollLatchingState();
+    ~ScrollLatchingState();
+
+    void clear();
+
+    Element* wheelEventElement() { return m_wheelEventElement.get(); }
+    void setWheelEventElement(Element*);
+    Frame* frame() { return m_frame; }
+    void setFrame(Frame* frame) { m_frame = frame; }
+
+    bool widgetIsLatched() const { return m_widgetIsLatched; }
+    void setWidgetIsLatched(bool isOverWidget);
+
+    Element* previousWheelScrolledElement() { return m_previousWheelScrolledElement.get(); }
+    void setPreviousWheelScrolledElement(Element*);
+    
+    ContainerNode* scrollableContainer() { return m_scrollableContainer.get(); }
+    void setScrollableContainer(ContainerNode*);
+    bool startedGestureAtScrollLimit() const { return m_startedGestureAtScrollLimit; }
+    void setStartedGestureAtScrollLimit(bool startedAtLimit) { m_startedGestureAtScrollLimit = startedAtLimit; }
+
+private:
+    RefPtr<Element> m_wheelEventElement;
+    RefPtr<Element> m_previousWheelScrolledElement;
+    RefPtr<ContainerNode> m_scrollableContainer;
+
+    Frame* m_frame { nullptr };
+
+    bool m_widgetIsLatched { false };
+    bool m_startedGestureAtScrollLimit { false };
+};
+    
+} // namespace WebCore