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
29 namespace WebCore {
30
HTMLSourceTracker()31 HTMLSourceTracker::HTMLSourceTracker()
32 {
33 }
34
start(const HTMLInputStream & input,HTMLToken & token)35 void 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
end(const HTMLInputStream & input,HTMLToken & token)42 void 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
sourceForToken(const HTMLToken & token)49 String 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