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 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#include "core/fileapi/FileReaderSync.h"
33
34#include "bindings/v8/ExceptionState.h"
35#include "core/dom/ExceptionCode.h"
36#include "core/fileapi/Blob.h"
37#include "core/fileapi/FileError.h"
38#include "core/fileapi/FileReaderLoader.h"
39#include "wtf/ArrayBuffer.h"
40#include "wtf/PassRefPtr.h"
41
42namespace WebCore {
43
44FileReaderSync::FileReaderSync()
45{
46    ScriptWrappable::init(this);
47}
48
49PassRefPtr<ArrayBuffer> FileReaderSync::readAsArrayBuffer(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionState& es)
50{
51    if (!blob) {
52        es.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
53        return 0;
54    }
55
56    FileReaderLoader loader(FileReaderLoader::ReadAsArrayBuffer, 0);
57    startLoading(scriptExecutionContext, loader, *blob, es);
58
59    return loader.arrayBufferResult();
60}
61
62String FileReaderSync::readAsBinaryString(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionState& es)
63{
64    if (!blob) {
65        es.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
66        return String();
67    }
68
69    FileReaderLoader loader(FileReaderLoader::ReadAsBinaryString, 0);
70    startLoading(scriptExecutionContext, loader, *blob, es);
71    return loader.stringResult();
72}
73
74String FileReaderSync::readAsText(ScriptExecutionContext* scriptExecutionContext, Blob* blob, const String& encoding, ExceptionState& es)
75{
76    if (!blob) {
77        es.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
78        return String();
79    }
80
81    FileReaderLoader loader(FileReaderLoader::ReadAsText, 0);
82    loader.setEncoding(encoding);
83    startLoading(scriptExecutionContext, loader, *blob, es);
84    return loader.stringResult();
85}
86
87String FileReaderSync::readAsDataURL(ScriptExecutionContext* scriptExecutionContext, Blob* blob, ExceptionState& es)
88{
89    if (!blob) {
90        es.throwDOMException(NotFoundError, FileError::notFoundErrorMessage);
91        return String();
92    }
93
94    FileReaderLoader loader(FileReaderLoader::ReadAsDataURL, 0);
95    loader.setDataType(blob->type());
96    startLoading(scriptExecutionContext, loader, *blob, es);
97    return loader.stringResult();
98}
99
100void FileReaderSync::startLoading(ScriptExecutionContext* scriptExecutionContext, FileReaderLoader& loader, const Blob& blob, ExceptionState& es)
101{
102    loader.start(scriptExecutionContext, blob);
103    if (loader.errorCode())
104        FileError::throwDOMException(es, loader.errorCode());
105}
106
107} // namespace WebCore
108