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 are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32
33#include "modules/encoding/TextEncoder.h"
34
35#include "bindings/v8/Dictionary.h"
36#include "bindings/v8/ExceptionState.h"
37#include "wtf/text/CString.h"
38#include "wtf/text/TextEncodingRegistry.h"
39
40namespace WebCore {
41
42PassRefPtr<TextEncoder> TextEncoder::create(const String& utfLabel, ExceptionState& es)
43{
44    const String& encodingLabel = utfLabel.isNull() ? String("utf-8") : utfLabel;
45
46    // FIXME: Types don't match Encoding spec, e.g. "ascii" => "US-ASCII" not "UTF-8".
47
48    WTF::TextEncoding encoding(encodingLabel);
49    if (!encoding.isValid()) {
50        es.throwTypeError();
51        return 0;
52    }
53
54    String name(encoding.name());
55    if (name != "UTF-8" && name != "UTF-16LE" && name != "UTF-16BE") {
56        es.throwTypeError();
57        return 0;
58    }
59
60    return adoptRef(new TextEncoder(encoding.name()));
61}
62
63TextEncoder::TextEncoder(const String& encoding)
64    : m_encoding(encoding)
65    , m_codec(newTextCodec(m_encoding))
66{
67}
68
69TextEncoder::~TextEncoder()
70{
71}
72
73String TextEncoder::encoding() const
74{
75    return String(m_encoding.name()).lower();
76}
77
78PassRefPtr<Uint8Array> TextEncoder::encode(const String& input, const Dictionary& options)
79{
80    bool stream = false;
81    options.get("stream", stream);
82
83    // FIXME: Not flushing is not supported by TextCodec for encode; add it or
84    // handle split surrogates here.
85
86    CString result;
87    if (input.is8Bit())
88        result = m_codec->encode(input.characters8(), input.length(), WTF::QuestionMarksForUnencodables);
89    else
90        result = m_codec->encode(input.characters16(), input.length(), WTF::QuestionMarksForUnencodables);
91
92    const char* buffer = result.data();
93    const unsigned char* unsignedBuffer = reinterpret_cast<const unsigned char*>(buffer);
94
95    return Uint8Array::create(unsignedBuffer, result.length());
96}
97
98} // namespace WebCore
99