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 "DOMFileSystem.h"
33
34#if ENABLE(FILE_SYSTEM)
35
36#include "AsyncFileSystem.h"
37#include "DOMFilePath.h"
38#include "DirectoryEntry.h"
39#include "ErrorCallback.h"
40#include "File.h"
41#include "FileEntry.h"
42#include "FileMetadata.h"
43#include "FileSystemCallbacks.h"
44#include "FileWriter.h"
45#include "FileWriterBaseCallback.h"
46#include "FileWriterCallback.h"
47#include "MetadataCallback.h"
48#include "ScriptExecutionContext.h"
49#include <wtf/OwnPtr.h>
50
51namespace WebCore {
52
53DOMFileSystem::DOMFileSystem(ScriptExecutionContext* context, const String& name, PassOwnPtr<AsyncFileSystem> asyncFileSystem)
54    : DOMFileSystemBase(context, name, asyncFileSystem)
55    , ActiveDOMObject(context, this)
56{
57}
58
59PassRefPtr<DirectoryEntry> DOMFileSystem::root()
60{
61    return DirectoryEntry::create(this, DOMFilePath::root);
62}
63
64void DOMFileSystem::stop()
65{
66    m_asyncFileSystem->stop();
67}
68
69bool DOMFileSystem::hasPendingActivity() const
70{
71    return m_asyncFileSystem->hasPendingActivity();
72}
73
74void DOMFileSystem::contextDestroyed()
75{
76    m_asyncFileSystem->stop();
77    ActiveDOMObject::contextDestroyed();
78}
79
80namespace {
81
82class ConvertToFileWriterCallback : public FileWriterBaseCallback {
83public:
84    static PassRefPtr<ConvertToFileWriterCallback> create(PassRefPtr<FileWriterCallback> callback)
85    {
86        return adoptRef(new ConvertToFileWriterCallback(callback));
87    }
88
89    bool handleEvent(FileWriterBase* fileWriterBase)
90    {
91        return m_callback->handleEvent(static_cast<FileWriter*>(fileWriterBase));
92    }
93private:
94    ConvertToFileWriterCallback(PassRefPtr<FileWriterCallback> callback)
95        : m_callback(callback)
96    {
97    }
98    RefPtr<FileWriterCallback> m_callback;
99};
100
101}
102
103void DOMFileSystem::createWriter(const FileEntry* fileEntry, PassRefPtr<FileWriterCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback)
104{
105    ASSERT(fileEntry);
106
107    String platformPath = m_asyncFileSystem->virtualToPlatformPath(fileEntry->fullPath());
108
109    RefPtr<FileWriter> fileWriter = FileWriter::create(scriptExecutionContext());
110    RefPtr<FileWriterBaseCallback> conversionCallback = ConvertToFileWriterCallback::create(successCallback);
111    OwnPtr<FileWriterBaseCallbacks> callbacks = FileWriterBaseCallbacks::create(fileWriter, conversionCallback, errorCallback);
112    m_asyncFileSystem->createWriter(fileWriter.get(), platformPath, callbacks.release());
113}
114
115namespace {
116
117class GetPathCallback : public FileSystemCallbacksBase {
118public:
119    static PassOwnPtr<GetPathCallback> create(PassRefPtr<DOMFileSystem> filesystem, const String& path, PassRefPtr<FileCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback)
120    {
121        return adoptPtr(new GetPathCallback(filesystem, path, successCallback, errorCallback));
122    }
123
124    virtual void didReadMetadata(const FileMetadata& metadata)
125    {
126        if (!metadata.platformPath.isEmpty())
127            m_path = metadata.platformPath;
128
129        m_filesystem->scheduleCallback(m_successCallback.release(), File::create(m_path));
130    }
131
132private:
133    GetPathCallback(PassRefPtr<DOMFileSystem> filesystem, const String& path, PassRefPtr<FileCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback)
134        : FileSystemCallbacksBase(errorCallback)
135        , m_filesystem(filesystem)
136        , m_path(path)
137        , m_successCallback(successCallback)
138    {
139    }
140
141    RefPtr<DOMFileSystem> m_filesystem;
142    String m_path;
143    RefPtr<FileCallback> m_successCallback;
144};
145
146} // namespace
147
148void DOMFileSystem::createFile(const FileEntry* fileEntry, PassRefPtr<FileCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback)
149{
150    String platformPath = m_asyncFileSystem->virtualToPlatformPath(fileEntry->fullPath());
151
152    m_asyncFileSystem->readMetadata(platformPath, GetPathCallback::create(this, platformPath, successCallback, errorCallback));
153}
154
155} // namespace WebCore
156
157#endif // ENABLE(FILE_SYSTEM)
158