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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 #ifndef HTMLTreeBuilderSimulator_h
     27 #define HTMLTreeBuilderSimulator_h
     28 
     29 #include "core/html/parser/HTMLParserOptions.h"
     30 #include "wtf/Vector.h"
     31 
     32 namespace WebCore {
     33 
     34 class CompactHTMLToken;
     35 class HTMLTokenizer;
     36 class HTMLTreeBuilder;
     37 
     38 class HTMLTreeBuilderSimulator {
     39     WTF_MAKE_FAST_ALLOCATED;
     40 private:
     41     enum Namespace {
     42         HTML,
     43         SVG,
     44         MathML
     45     };
     46 
     47 public:
     48     typedef Vector<Namespace, 1> State;
     49 
     50     explicit HTMLTreeBuilderSimulator(const HTMLParserOptions&);
     51 
     52     static State stateFor(HTMLTreeBuilder*);
     53 
     54     const State& state() const { return m_namespaceStack; }
     55     void setState(const State& state) { m_namespaceStack = state; }
     56 
     57     bool simulate(const CompactHTMLToken&, HTMLTokenizer*);
     58 
     59 private:
     60     explicit HTMLTreeBuilderSimulator(HTMLTreeBuilder*);
     61 
     62     bool inForeignContent() const { return m_namespaceStack.last() != HTML; }
     63 
     64     HTMLParserOptions m_options;
     65     State m_namespaceStack;
     66 };
     67 
     68 }
     69 
     70 #endif
     71