1 files changed, 85 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/replay/InputCursor.h b/Source/JavaScriptCore/replay/InputCursor.h
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+++ b/Source/JavaScriptCore/replay/InputCursor.h
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+/*
+ * Copyright (C) 2011, 2012 University of Washington. All rights reserved.
+ * 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * HOLDER 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
+
+#if ENABLE(WEB_REPLAY)
+
+#include "NondeterministicInput.h"
+#include <wtf/Noncopyable.h>
+#include <wtf/RefCounted.h>
+
+namespace JSC {
+
+class InputCursor : public RefCounted<InputCursor> {
+    WTF_MAKE_NONCOPYABLE(InputCursor);
+public:
+    InputCursor() { }
+    virtual ~InputCursor() { }
+
+    virtual bool isCapturing() const = 0;
+    virtual bool isReplaying() const = 0;
+
+    void setWithinEventLoopInputExtent(bool withinEventLoopInputExtent)
+    {
+        // We can be within two input extents when a nested run loop
+        // processes additional user inputs while the debugger is paused.
+        // However, the debugger should not pause when capturing, and we
+        // should not replay event loop inputs while in a nested run loop.
+        ASSERT(m_withinEventLoopInputExtent != withinEventLoopInputExtent || !(isCapturing() || isReplaying()));
+        m_withinEventLoopInputExtent = withinEventLoopInputExtent;
+    }
+
+    bool withinEventLoopInputExtent() const { return m_withinEventLoopInputExtent; }
+
+    template <class InputType, class... Args> inline
+    void appendInput(Args&&... args)
+    {
+        InputType* rawInput = WTF::safeCast<InputType*>(new InputType(std::forward<Args>(args)...));
+        return storeInput(std::unique_ptr<NondeterministicInputBase>(rawInput));
+    }
+
+    template <class InputType> inline
+    InputType* fetchInput()
+    {
+        return static_cast<InputType*>(loadInput(InputTraits<InputType>::queue(), InputTraits<InputType>::type()));
+    }
+
+    virtual void storeInput(std::unique_ptr<NondeterministicInputBase>) = 0;
+    virtual NondeterministicInputBase* uncheckedLoadInput(InputQueue) = 0;
+protected:
+    virtual NondeterministicInputBase* loadInput(InputQueue, const String&) = 0;
+
+private:
+    bool m_withinEventLoopInputExtent {false};
+};
+
+} // namespace JSC
+
+using JSC::InputCursor;
+
+#endif // ENABLE(WEB_REPLAY)