diff -r 000000000000 -r 4f2f89ce4247 WebCore/html/FileStreamProxy.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/html/FileStreamProxy.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,202 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+
+#if ENABLE(FILE_READER) || ENABLE(FILE_WRITER)
+
+#include "FileStreamProxy.h"
+
+#include "Blob.h"
+#include "CrossThreadTask.h"
+#include "FileStream.h"
+#include "FileThread.h"
+#include "FileThreadTask.h"
+#include "PlatformString.h"
+#include "ScriptExecutionContext.h"
+
+namespace WebCore {
+
+inline FileStreamProxy::FileStreamProxy(ScriptExecutionContext* context, FileStreamClient* client)
+    : m_context(context)
+    , m_client(client)
+    , m_stream(FileStream::create(this))
+{
+}
+
+PassRefPtr<FileStreamProxy> FileStreamProxy::create(ScriptExecutionContext* context, FileStreamClient* client)
+{
+    RefPtr<FileStreamProxy> proxy = adoptRef(new FileStreamProxy(context, client));
+
+    // Hold an ref so that the instance will not get deleted while there are tasks on the file thread.
+    // This is balanced by the deref in derefProxyOnContext below.
+    proxy->ref();
+
+    proxy->fileThread()->postTask(createFileThreadTask(proxy->m_stream.get(), &FileStream::start));
+
+    return proxy.release();
+}
+
+FileStreamProxy::~FileStreamProxy()
+{
+}
+
+void FileStreamProxy::openForRead(Blob* blob)
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::openForRead, blob));
+}
+
+void FileStreamProxy::openForWrite(const String& path)
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::openForWrite, path));
+}
+
+void FileStreamProxy::close()
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::close));
+}
+
+void FileStreamProxy::read(char* buffer, int length)
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::read, buffer, length));
+}
+
+void FileStreamProxy::write(Blob* blob, long long position, int length)
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::write, blob, position, length));
+}
+
+void FileStreamProxy::truncate(long long position)
+{
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::truncate, position));
+}
+
+FileThread* FileStreamProxy::fileThread()
+{
+    ASSERT(m_context->isContextThread());
+    ASSERT(m_context->fileThread());
+    return m_context->fileThread();
+}
+
+void FileStreamProxy::stop()
+{
+    // Clear the client so that we won't be calling callbacks on the client.
+    m_client = 0;
+
+    fileThread()->unscheduleTasks(m_stream.get());
+    fileThread()->postTask(createFileThreadTask(m_stream.get(), &FileStream::stop));
+}
+
+static void notifyGetSizeOnContext(ScriptExecutionContext*, FileStreamProxy* proxy, long long size)
+{
+    if (proxy->client())
+        proxy->client()->didGetSize(size);
+}
+
+void FileStreamProxy::didGetSize(long long size)
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyGetSizeOnContext, this, size));
+}
+
+static void notifyReadOnContext(ScriptExecutionContext*, FileStreamProxy* proxy, const char* data, int bytesRead)
+{
+    if (proxy->client())
+        proxy->client()->didRead(data, bytesRead);
+}
+
+void FileStreamProxy::didRead(const char* data, int bytesRead)
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyReadOnContext, this, data, bytesRead));
+}
+
+static void notifyWriteOnContext(ScriptExecutionContext*, FileStreamProxy* proxy, int bytesWritten)
+{
+    if (proxy->client())
+        proxy->client()->didWrite(bytesWritten);
+}
+
+void FileStreamProxy::didWrite(int bytesWritten)
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyWriteOnContext, this, bytesWritten));
+}
+
+static void notifyStartOnContext(ScriptExecutionContext*, FileStreamProxy* proxy)
+{
+    if (proxy->client())
+        proxy->client()->didStart();
+}
+
+void FileStreamProxy::didStart()
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyStartOnContext, this));
+}
+
+static void notifyFinishOnContext(ScriptExecutionContext*, FileStreamProxy* proxy)
+{
+    if (proxy->client())
+        proxy->client()->didFinish();
+}
+
+void FileStreamProxy::didFinish()
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyFinishOnContext, this));
+}
+
+static void notifyFailOnContext(ScriptExecutionContext*, FileStreamProxy* proxy, ExceptionCode ec)
+{
+    if (proxy->client())
+        proxy->client()->didFail(ec);
+}
+
+void FileStreamProxy::didFail(ExceptionCode ec)
+{
+    ASSERT(!m_context->isContextThread());
+    m_context->postTask(createCallbackTask(&notifyFailOnContext, this, ec));
+}
+
+static void derefProxyOnContext(ScriptExecutionContext*, FileStreamProxy* proxy)
+{
+    ASSERT(proxy->hasOneRef());
+    proxy->deref();
+}
+
+void FileStreamProxy::didStop()
+{
+    m_context->postTask(createCallbackTask(&derefProxyOnContext, this));
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(FILE_WRITER)