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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DOMFileSystem_h
#define DOMFileSystem_h
#if ENABLE(FILE_SYSTEM)
#include "ActiveDOMObject.h"
#include "AsyncFileSystem.h"
#include "Flags.h"
#include "PlatformString.h"
#include "ScriptExecutionContext.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefCounted.h>
namespace WebCore {
class DirectoryEntry;
class Entry;
class EntryCallback;
class EntriesCallback;
class ErrorCallback;
class FileEntry;
class FileWriterCallback;
class MetadataCallback;
class VoidCallback;
class DOMFileSystem : public RefCounted<DOMFileSystem>, public ActiveDOMObject {
public:
static PassRefPtr<DOMFileSystem> create(ScriptExecutionContext* context, const String& name, PassOwnPtr<AsyncFileSystem> asyncFileSystem)
{
return adoptRef(new DOMFileSystem(context, name, asyncFileSystem));
}
virtual ~DOMFileSystem();
const String& name() const { return m_name; }
PassRefPtr<DirectoryEntry> root();
// ActiveDOMObject methods.
virtual void stop();
virtual bool hasPendingActivity() const;
virtual void contextDestroyed();
// Actual FileSystem API implementations. All the validity checks on virtual paths are done at DOMFileSystem level.
void getMetadata(const Entry* entry, PassRefPtr<MetadataCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback);
void move(const Entry* src, PassRefPtr<Entry> parent, const String& name, PassRefPtr<EntryCallback>, PassRefPtr<ErrorCallback>);
void copy(const Entry* src, PassRefPtr<Entry> parent, const String& name, PassRefPtr<EntryCallback>, PassRefPtr<ErrorCallback>);
void remove(const Entry* entry, PassRefPtr<VoidCallback>, PassRefPtr<ErrorCallback>);
void getParent(const Entry* entry, PassRefPtr<EntryCallback>, PassRefPtr<ErrorCallback>);
void getFile(const Entry* base, const String& path, PassRefPtr<Flags>, PassRefPtr<EntryCallback>, PassRefPtr<ErrorCallback>);
void getDirectory(const Entry* base, const String& path, PassRefPtr<Flags>, PassRefPtr<EntryCallback>, PassRefPtr<ErrorCallback>);
void readDirectory(const String& path, PassRefPtr<EntriesCallback>, PassRefPtr<ErrorCallback>);
void createWriter(const FileEntry* file, PassRefPtr<FileWriterCallback>, PassRefPtr<ErrorCallback>);
// Schedule a callback. This should not cross threads (should be called on the same context thread).
template <typename CB, typename CBArg>
static void scheduleCallback(ScriptExecutionContext*, PassRefPtr<CB>, PassRefPtr<CBArg>);
private:
DOMFileSystem(ScriptExecutionContext*, const String& name, PassOwnPtr<AsyncFileSystem>);
AsyncFileSystem* asyncFileSystem() const { return m_asyncFileSystem.get(); }
// A helper template to schedule a callback task.
// FIXME: move this to a more generic place.
template <typename CB, typename CBArg>
class DispatchCallbackTask : public ScriptExecutionContext::Task {
public:
DispatchCallbackTask(PassRefPtr<CB> callback, PassRefPtr<CBArg> arg)
: m_callback(callback)
, m_callbackArg(arg)
{
}
virtual void performTask(ScriptExecutionContext*)
{
m_callback->handleEvent(m_callbackArg.get());
}
private:
RefPtr<CB> m_callback;
RefPtr<CBArg> m_callbackArg;
};
String m_name;
mutable OwnPtr<AsyncFileSystem> m_asyncFileSystem;
};
template <typename CB, typename CBArg>
void DOMFileSystem::scheduleCallback(ScriptExecutionContext* scriptExecutionContext, PassRefPtr<CB> callback, PassRefPtr<CBArg> arg)
{
ASSERT(scriptExecutionContext->isContextThread());
scriptExecutionContext->postTask(new DispatchCallbackTask<CB, CBArg>(callback, arg));
}
} // namespace
#endif // ENABLE(FILE_SYSTEM)
#endif // DOMFileSystem_h
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