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/*
* 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 "HTMLTokenizer.h"
#include "SegmentedString.h"
namespace WebCore {
class TokenPreloadScanner {
WTF_MAKE_NONCOPYABLE(TokenPreloadScanner);
public:
explicit TokenPreloadScanner(const URL& documentURL, float deviceScaleFactor = 1.0);
void scan(const HTMLToken&, PreloadRequestStream&, Document&);
void setPredictedBaseElementURL(const URL& url) { m_predictedBaseElementURL = url; }
bool inPicture() { return !m_pictureSourceState.isEmpty(); }
private:
enum class TagId {
// These tags are scanned by the StartTagScanner.
Img,
Input,
Link,
Script,
Meta,
Source,
// These tags are not scanned by the StartTagScanner.
Unknown,
Style,
Base,
Template,
Picture
};
class StartTagScanner;
static TagId tagIdFor(const HTMLToken::DataVector&);
static String initiatorFor(TagId);
void updatePredictedBaseURL(const HTMLToken&);
CSSPreloadScanner m_cssScanner;
const URL m_documentURL;
const float m_deviceScaleFactor { 1 };
URL m_predictedBaseElementURL;
bool m_inStyle { false };
Vector<bool> m_pictureSourceState;
#if ENABLE(TEMPLATE_ELEMENT)
unsigned m_templateCount { 0 };
#endif
};
class HTMLPreloadScanner {
WTF_MAKE_FAST_ALLOCATED;
public:
HTMLPreloadScanner(const HTMLParserOptions&, const URL& documentURL, float deviceScaleFactor = 1.0);
void appendToEnd(const SegmentedString&);
void scan(HTMLResourcePreloader&, Document&);
private:
TokenPreloadScanner m_scanner;
SegmentedString m_source;
HTMLTokenizer m_tokenizer;
};
WEBCORE_EXPORT bool testPreloadScannerViewportSupport(Document*);
}
#endif
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