HTMLSourceTracker.cpp revision 2fc2651226baac27029e38c9d6ef883fa32084db 
1/*
2 * Copyright (C) 2010 Adam Barth. 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 APPLE 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 APPLE 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 "HTMLSourceTracker.h"
28
29namespace WebCore {
30
31HTMLSourceTracker::HTMLSourceTracker()
32{
33}
34
35void HTMLSourceTracker::start(const HTMLInputStream& input, HTMLToken& token)
36{
37    m_sourceFromPreviousSegments = token.type() == HTMLToken::Uninitialized ? String() : m_sourceFromPreviousSegments + m_source.toString();
38    m_source = input.current();
39    token.setBaseOffset(input.current().numberOfCharactersConsumed() - m_sourceFromPreviousSegments.length());
40}
41
42void HTMLSourceTracker::end(const HTMLInputStream& input, HTMLToken& token)
43{
44    m_cachedSourceForToken = String();
45    // FIXME: This work should really be done by the HTMLTokenizer.
46    token.end(input.current().numberOfCharactersConsumed());
47}
48
49String HTMLSourceTracker::sourceForToken(const HTMLToken& token)
50{
51    if (token.type() == HTMLToken::EndOfFile)
52        return String(); // Hides the null character we use to mark the end of file.
53
54    if (!m_cachedSourceForToken.isEmpty())
55        return m_cachedSourceForToken;
56
57    ASSERT(!token.startIndex());
58    UChar* data = 0;
59    int length = token.endIndex() - token.startIndex() - m_sourceFromPreviousSegments.length();
60    String source = String::createUninitialized(length, data);
61    for (int i = 0; i < length; ++i) {
62        data[i] = *m_source;
63        m_source.advance();
64    }
65    m_cachedSourceForToken = m_sourceFromPreviousSegments + source;
66    return m_cachedSourceForToken;
67}
68
69}
70