/*
 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
 * Copyright (C) 2010 Google 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. 
 */

#ifndef HTMLPreloadScanner_h
#define HTMLPreloadScanner_h

#include "CSSPreloadScanner.h"
#include "HTMLToken.h"
#include "SegmentedString.h"

namespace WebCore {

class Document;
class HTMLToken;
class HTMLTokenizer;
class RenderView;
class SegmentedString;
class Frame;

class HTMLPreloadScanner {
    WTF_MAKE_NONCOPYABLE(HTMLPreloadScanner); WTF_MAKE_FAST_ALLOCATED;
public:
    explicit HTMLPreloadScanner(Document*, float deviceScaleFactor = 1.0);

    void appendToEnd(const SegmentedString&);
    void scan(
#if ENABLE_PICTURE_SIZES
        RenderView*, Frame*
#endif
        );

private:
    void processToken(
#if ENABLE_PICTURE_SIZES
        RenderView*, Frame*
#endif
		);
    bool scanningBody() const;
    void updatePredictedBaseElementURL(const KURL& baseElementURL);

    Document* m_document;
    SegmentedString m_source;
    CSSPreloadScanner m_cssScanner;
    OwnPtr<HTMLTokenizer> m_tokenizer;
    HTMLToken m_token;
    bool m_bodySeen;
    bool m_inStyle;
    KURL m_predictedBaseElementURL;
    float m_deviceScaleFactor;
};

}

#endif
