1/*
2 * Copyright (C) 2010 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 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 "core/dom/DecodedDataDocumentParser.h"
28
29#include "core/dom/Document.h"
30#include "core/dom/DocumentEncodingData.h"
31#include "core/html/parser/TextResourceDecoder.h"
32
33namespace blink {
34
35DecodedDataDocumentParser::DecodedDataDocumentParser(Document& document)
36    : DocumentParser(&document)
37    , m_needsDecoder(true)
38{
39}
40
41DecodedDataDocumentParser::~DecodedDataDocumentParser()
42{
43}
44
45void DecodedDataDocumentParser::setDecoder(PassOwnPtr<TextResourceDecoder> decoder)
46{
47    // If the decoder is explicitly unset rather than having ownership
48    // transferred away by takeDecoder(), we need to make sure it's recreated
49    // next time data is appended.
50    m_needsDecoder = !decoder;
51    m_decoder = decoder;
52}
53
54TextResourceDecoder* DecodedDataDocumentParser::decoder()
55{
56    return m_decoder.get();
57}
58
59PassOwnPtr<TextResourceDecoder> DecodedDataDocumentParser::takeDecoder()
60{
61    return m_decoder.release();
62}
63
64void DecodedDataDocumentParser::appendBytes(const char* data, size_t length)
65{
66    if (!length)
67        return;
68
69    // This should be checking isStopped(), but XMLDocumentParser prematurely
70    // stops parsing when handling an XSLT processing instruction and still
71    // needs to receive decoded bytes.
72    if (isDetached())
73        return;
74
75    String decoded = m_decoder->decode(data, length);
76    updateDocument(decoded);
77}
78
79void DecodedDataDocumentParser::flush()
80{
81    // This should be checking isStopped(), but XMLDocumentParser prematurely
82    // stops parsing when handling an XSLT processing instruction and still
83    // needs to receive decoded bytes.
84    if (isDetached())
85        return;
86
87    // null decoder indicates there is no data received.
88    // We have nothing to do in that case.
89    if (!m_decoder)
90        return;
91
92    String remainingData = m_decoder->flush();
93    updateDocument(remainingData);
94}
95
96void DecodedDataDocumentParser::updateDocument(String& decodedData)
97{
98    document()->setEncodingData(DocumentEncodingData(*m_decoder.get()));
99
100    if (!decodedData.isEmpty())
101        append(decodedData.releaseImpl());
102}
103
104};
105