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      1 /*
      2  * Copyright (C) 2013 Google, Inc. All Rights Reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GOOGLE INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/html/parser/CompactHTMLToken.h"
     28 
     29 #include "core/dom/QualifiedName.h"
     30 #include "core/html/parser/HTMLParserIdioms.h"
     31 
     32 namespace blink {
     33 
     34 struct SameSizeAsCompactHTMLToken  {
     35     unsigned bitfields;
     36     String data;
     37     Vector<Attribute> vector;
     38     TextPosition textPosition;
     39 };
     40 
     41 COMPILE_ASSERT(sizeof(CompactHTMLToken) == sizeof(SameSizeAsCompactHTMLToken), CompactHTMLToken_should_stay_small);
     42 
     43 CompactHTMLToken::CompactHTMLToken(const HTMLToken* token, const TextPosition& textPosition)
     44     : m_type(token->type())
     45     , m_isAll8BitData(false)
     46     , m_doctypeForcesQuirks(false)
     47     , m_textPosition(textPosition)
     48 {
     49     switch (m_type) {
     50     case HTMLToken::Uninitialized:
     51         ASSERT_NOT_REACHED();
     52         break;
     53     case HTMLToken::DOCTYPE: {
     54         m_data = attemptStaticStringCreation(token->name(), Likely8Bit);
     55 
     56         // There is only 1 DOCTYPE token per document, so to avoid increasing the
     57         // size of CompactHTMLToken, we just use the m_attributes vector.
     58         m_attributes.append(Attribute(attemptStaticStringCreation(token->publicIdentifier(), Likely8Bit), String(token->systemIdentifier())));
     59         m_doctypeForcesQuirks = token->forceQuirks();
     60         break;
     61     }
     62     case HTMLToken::EndOfFile:
     63         break;
     64     case HTMLToken::StartTag:
     65         m_attributes.reserveInitialCapacity(token->attributes().size());
     66         for (Vector<HTMLToken::Attribute>::const_iterator it = token->attributes().begin(); it != token->attributes().end(); ++it)
     67             m_attributes.append(Attribute(attemptStaticStringCreation(it->name, Likely8Bit), StringImpl::create8BitIfPossible(it->value)));
     68         // Fall through!
     69     case HTMLToken::EndTag:
     70         m_selfClosing = token->selfClosing();
     71         // Fall through!
     72     case HTMLToken::Comment:
     73     case HTMLToken::Character: {
     74         m_isAll8BitData = token->isAll8BitData();
     75         m_data = attemptStaticStringCreation(token->data(), token->isAll8BitData() ? Force8Bit : Force16Bit);
     76         break;
     77     }
     78     default:
     79         ASSERT_NOT_REACHED();
     80         break;
     81     }
     82 }
     83 
     84 const CompactHTMLToken::Attribute* CompactHTMLToken::getAttributeItem(const QualifiedName& name) const
     85 {
     86     for (unsigned i = 0; i < m_attributes.size(); ++i) {
     87         if (threadSafeMatch(m_attributes.at(i).name, name))
     88             return &m_attributes.at(i);
     89     }
     90     return 0;
     91 }
     92 
     93 bool CompactHTMLToken::isSafeToSendToAnotherThread() const
     94 {
     95     for (Vector<Attribute>::const_iterator it = m_attributes.begin(); it != m_attributes.end(); ++it) {
     96         if (!it->name.isSafeToSendToAnotherThread())
     97             return false;
     98         if (!it->value.isSafeToSendToAnotherThread())
     99             return false;
    100     }
    101     return m_data.isSafeToSendToAnotherThread();
    102 }
    103 
    104 }
    105