Upstream ios/web/ HTML tokenizer

ios/third_party/blink/src/html_token.h

+/*
+ * Copyright (C) 2013 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 HTMLToken_h
+#define HTMLToken_h
+
+#include <vector>
+
+#include "ios/third_party/blink/src/html_tokenizer_adapter.h"
+
+namespace WebCore {
+
+class HTMLToken {
+    WTF_MAKE_NONCOPYABLE(HTMLToken);
+
+public:
+    enum Type {
+        Uninitialized,
+        DOCTYPE,
+        StartTag,
+        EndTag,
+        Comment,
+        Character,
+        EndOfFile,
+    };
+
+    HTMLToken();
+    ~HTMLToken();
+
+    void clear()
+    {
+        m_type = Uninitialized;
+        m_data.clear();
+    }
+
+    Type type() const { return m_type; }
+
+    void makeEndOfFile()
+    {
+        ASSERT(m_type == Uninitialized);
+        m_type = EndOfFile;
+    }
+
+    void appendToName(LChar character)
+    {
+        ASSERT(m_type == StartTag || m_type == EndTag || m_type == DOCTYPE);
+        ASSERT(character);
+        m_data.push_back(character);
+    }
+
+    bool nameEquals(const LChar* name, size_t length)
+    {
+        ASSERT(m_type == StartTag || m_type == EndTag || m_type == DOCTYPE);
+        if (length != m_data.size())
+            return false;
+
+        for (size_t index = 0; index < length; ++index) {
+            if (m_data.at(index) != name[index])
+                return false;
+        }
+
+        return true;
+    }
+
+    /* DOCTYPE Tokens */
+
+    void beginDOCTYPE()
+    {
+        ASSERT(m_type == Uninitialized);
+        m_type = DOCTYPE;
+    }
+
+    /* Start/End Tag Tokens */
+
+    void beginStartTag(LChar character)
+    {
+        ASSERT(character);
+        ASSERT(m_type == Uninitialized);
+        m_type = StartTag;
+
+        m_data.push_back(character);
+    }
+
+    void beginEndTag(LChar character)
+    {
+        ASSERT(m_type == Uninitialized);
+        m_type = EndTag;
+
+        m_data.push_back(character);
+    }
+
+    /* Character Tokens */
+
+    // Starting a character token works slightly differently than starting
+    // other types of tokens because we want to save a per-character branch.
+    void ensureIsCharacterToken()
+    {
+        ASSERT(m_type == Uninitialized || m_type == Character);
+        m_type = Character;
+    }
+
+    /* Comment Tokens */
+
+    void beginComment()
+    {
+        ASSERT(m_type == Uninitialized);
+        m_type = Comment;
+    }
+
+private:
+    Type m_type;
+    std::vector<LChar> m_data;
+};
+}
+
+#endif