Source/core/html/parser/CompactHTMLToken.cpp

/*
 * Copyright (C) 2013 Google, Inc. All Rights Reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 *
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "core/html/parser/CompactHTMLToken.h"

#include "core/dom/QualifiedName.h"
#include "core/html/parser/HTMLParserIdioms.h"

namespace WebCore {

struct SameSizeAsCompactHTMLToken  {
    unsigned bitfields;
    String data;
    Vector<Attribute> vector;
    TextPosition textPosition;
};

COMPILE_ASSERT(sizeof(CompactHTMLToken) == sizeof(SameSizeAsCompactHTMLToken), CompactHTMLToken_should_stay_small);

CompactHTMLToken::CompactHTMLToken(const HTMLToken* token, const TextPosition& textPosition)
    : m_type(token->type())
    , m_isAll8BitData(false)
    , m_doctypeForcesQuirks(false)
    , m_textPosition(textPosition)
{
    switch (m_type) {
    case HTMLToken::Uninitialized:
        ASSERT_NOT_REACHED();
        break;
    case HTMLToken::DOCTYPE: {
        m_data = attemptStaticStringCreation(token->name(), Likely8Bit);

        // There is only 1 DOCTYPE token per document, so to avoid increasing the
        // size of CompactHTMLToken, we just use the m_attributes vector.
        m_attributes.append(Attribute(attemptStaticStringCreation(token->publicIdentifier(), Likely8Bit), String(token->systemIdentifier())));
        m_doctypeForcesQuirks = token->forceQuirks();
        break;
    }
    case HTMLToken::EndOfFile:
        break;
    case HTMLToken::StartTag:
        m_attributes.reserveInitialCapacity(token->attributes().size());
        for (Vector<HTMLToken::Attribute>::const_iterator it = token->attributes().begin(); it != token->attributes().end(); ++it)
            m_attributes.append(Attribute(attemptStaticStringCreation(it->name, Likely8Bit), StringImpl::create8BitIfPossible(it->value)));
        // Fall through!
    case HTMLToken::EndTag:
        m_selfClosing = token->selfClosing();
        // Fall through!
    case HTMLToken::Comment:
    case HTMLToken::Character: {
        m_isAll8BitData = token->isAll8BitData();
        m_data = attemptStaticStringCreation(token->data(), token->isAll8BitData() ? Force8Bit : Force16Bit);
        break;
    }
    default:
        ASSERT_NOT_REACHED();
        break;
    }
}

const CompactHTMLToken::Attribute* CompactHTMLToken::getAttributeItem(const QualifiedName& name) const
{
    for (unsigned i = 0; i < m_attributes.size(); ++i) {
        if (threadSafeMatch(m_attributes.at(i).name, name))
            return &m_attributes.at(i);
    }
    return 0;
}

bool CompactHTMLToken::isSafeToSendToAnotherThread() const
{
    for (Vector<Attribute>::const_iterator it = m_attributes.begin(); it != m_attributes.end(); ++it) {
        if (!it->name.isSafeToSendToAnotherThread())
            return false;
        if (!it->value.isSafeToSendToAnotherThread())
            return false;
    }
    return m_data.isSafeToSendToAnotherThread();
}

}