webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 65 insertions, 0 deletions

diff --git a/Source/WebCore/page/WheelEventTestTrigger.h b/Source/WebCore/page/WheelEventTestTrigger.h
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+++ b/Source/WebCore/page/WheelEventTestTrigger.h
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+/*
+ * Copyright (C) 2015 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.
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE 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 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
+
+#include <set>
+#include <wtf/HashMap.h>
+#include <wtf/Lock.h>
+#include <wtf/RunLoop.h>
+#include <wtf/ThreadSafeRefCounted.h>
+
+namespace WebCore {
+
+class WheelEventTestTrigger : public ThreadSafeRefCounted<WheelEventTestTrigger> {
+    WTF_MAKE_NONCOPYABLE(WheelEventTestTrigger); WTF_MAKE_FAST_ALLOCATED;
+public:
+    WheelEventTestTrigger();
+
+    WEBCORE_EXPORT void setTestCallbackAndStartNotificationTimer(std::function<void()>);
+    WEBCORE_EXPORT void clearAllTestDeferrals();
+    
+    enum DeferTestTriggerReason {
+        RubberbandInProgress,
+        ScrollSnapInProgress,
+        ScrollingThreadSyncNeeded,
+        ContentScrollInProgress
+    };
+    typedef const void* ScrollableAreaIdentifier;
+    void WEBCORE_EXPORT deferTestsForReason(ScrollableAreaIdentifier, DeferTestTriggerReason);
+    void WEBCORE_EXPORT removeTestDeferralForReason(ScrollableAreaIdentifier, DeferTestTriggerReason);
+    void triggerTestTimerFired();
+
+private:
+    std::function<void()> m_testNotificationCallback;
+    RunLoop::Timer<WheelEventTestTrigger> m_testTriggerTimer;
+    mutable Lock m_testTriggerMutex;
+    WTF::HashMap<ScrollableAreaIdentifier, std::set<DeferTestTriggerReason>> m_deferTestTriggerReasons;
+};
+
+} // namespace WebCore