Source/WebCore/loader/CanvasActivityRecord.h

/*
 * Copyright (C) 2018 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. 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
#include <wtf/HashSet.h>
#include <wtf/text/StringHash.h>
#include <wtf/text/WTFString.h>

namespace WebCore {
struct CanvasActivityRecord {
    HashSet<String> textWritten;
    bool wasDataRead { false };
    
    bool recordWrittenOrMeasuredText(const String&);
    void mergeWith(const CanvasActivityRecord&);
    
    template <class Encoder> void encode(Encoder&) const;
    template <class Decoder> static bool decode(Decoder&, CanvasActivityRecord&);
};
    
template <class Encoder>
void CanvasActivityRecord::encode(Encoder& encoder) const
{
    encoder << textWritten;
    encoder << wasDataRead;
}

template <class Decoder>
bool CanvasActivityRecord::decode(Decoder& decoder, CanvasActivityRecord& canvasActivityRecord)
{
    if (!decoder.decode(canvasActivityRecord.textWritten))
        return false;
    if (!decoder.decode(canvasActivityRecord.wasDataRead))
        return false;
    return true;
}
} // namespace WebCore