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      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 "LocalFileSystem.h"
     33 
     34 #if ENABLE(FILE_SYSTEM)
     35 
     36 #include "AsyncFileSystem.h"
     37 #include "ErrorCallback.h"
     38 #include "FileSystemCallback.h"
     39 #include "FileSystemCallbacks.h"
     40 #include "PlatformString.h"
     41 #include "WebFileSystem.h"
     42 #include "WebFileSystemCallbacksImpl.h"
     43 #include "WebFrameClient.h"
     44 #include "WebFrameImpl.h"
     45 #include "WebWorkerImpl.h"
     46 #include "WorkerContext.h"
     47 #include "WorkerThread.h"
     48 #include <wtf/Threading.h>
     49 
     50 using namespace WebKit;
     51 
     52 namespace WebCore {
     53 
     54 LocalFileSystem& LocalFileSystem::localFileSystem()
     55 {
     56     AtomicallyInitializedStatic(LocalFileSystem*, localFileSystem = new LocalFileSystem(""));
     57     return *localFileSystem;
     58 }
     59 
     60 namespace {
     61 
     62 enum CreationFlag {
     63     OpenExisting,
     64     CreateIfNotPresent
     65 };
     66 
     67 } // namespace
     68 
     69 static void openFileSystemHelper(ScriptExecutionContext* context, AsyncFileSystem::Type type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, bool synchronous, long long size, CreationFlag create)
     70 {
     71     ASSERT(context);
     72     if (context->isDocument()) {
     73         Document* document = static_cast<Document*>(context);
     74         WebFrameImpl* webFrame = WebFrameImpl::fromFrame(document->frame());
     75         webFrame->client()->openFileSystem(webFrame, static_cast<WebFileSystem::Type>(type), size, create == CreateIfNotPresent, new WebFileSystemCallbacksImpl(callbacks, type));
     76     } else {
     77         WorkerContext* workerContext = static_cast<WorkerContext*>(context);
     78         WorkerLoaderProxy* workerLoaderProxy = &workerContext->thread()->workerLoaderProxy();
     79         WebWorkerBase* webWorker = static_cast<WebWorkerBase*>(workerLoaderProxy);
     80         webWorker->openFileSystemForWorker(static_cast<WebFileSystem::Type>(type), size, create == CreateIfNotPresent, new WebFileSystemCallbacksImpl(callbacks, type, context, synchronous), synchronous);
     81     }
     82 }
     83 
     84 void LocalFileSystem::readFileSystem(ScriptExecutionContext* context, AsyncFileSystem::Type type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, bool synchronous)
     85 {
     86     openFileSystemHelper(context, type, callbacks, synchronous, 0, OpenExisting);
     87 }
     88 
     89 void LocalFileSystem::requestFileSystem(ScriptExecutionContext* context, AsyncFileSystem::Type type, long long size, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, bool synchronous)
     90 {
     91     openFileSystemHelper(context, type, callbacks, synchronous, size, CreateIfNotPresent);
     92 }
     93 
     94 } // namespace WebCore
     95 
     96 #endif // ENABLE(FILE_SYSTEM)
     97