Source/web/WorkerFileSystemClient.cpp

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#include "config.h"
#include "WorkerFileSystemClient.h"

#include "WebWorkerBase.h"
#include "WorkerAllowMainThreadBridgeBase.h"
#include "core/dom/ScriptExecutionContext.h"
#include "core/platform/AsyncFileSystemCallbacks.h"
#include "core/workers/WorkerGlobalScope.h"
#include "core/workers/WorkerThread.h"
#include "public/platform/Platform.h"
#include "public/platform/WebFileError.h"
#include "public/platform/WebFileSystem.h"
#include "public/platform/WebFileSystemType.h"
#include "wtf/MainThread.h"
#include "wtf/Threading.h"
#include "wtf/text/WTFString.h"

using namespace WebCore;

namespace WebKit {

namespace {

// This class is used to route the result of the WebWorkerBase::allowFileSystem
// call back to the worker context.
class AllowFileSystemMainThreadBridge : public WorkerAllowMainThreadBridgeBase {
public:
    static PassRefPtr<AllowFileSystemMainThreadBridge> create(WebCore::WorkerGlobalScope* workerGlobalScope, WebWorkerBase* webWorkerBase, const String& mode)
    {
        return adoptRef(new AllowFileSystemMainThreadBridge(workerGlobalScope, webWorkerBase, mode));
    }

private:
    AllowFileSystemMainThreadBridge(WebCore::WorkerGlobalScope* workerGlobalScope, WebWorkerBase* webWorkerBase, const String& mode)
        : WorkerAllowMainThreadBridgeBase(workerGlobalScope, webWorkerBase)
    {
        postTaskToMainThread(adoptPtr(new AllowParams(mode)));
    }

    virtual bool allowOnMainThread(WebCommonWorkerClient* commonClient, AllowParams*)
    {
        ASSERT(isMainThread());
        return commonClient->allowFileSystem();
    }
};

} // namespace

PassOwnPtr<FileSystemClient> WorkerFileSystemClient::create()
{
    return adoptPtr(static_cast<FileSystemClient*>(new WorkerFileSystemClient()));
}

WorkerFileSystemClient::~WorkerFileSystemClient()
{
}

bool WorkerFileSystemClient::allowFileSystem(ScriptExecutionContext* context)
{
    WorkerGlobalScope* workerGlobalScope = toWorkerGlobalScope(context);
    WebCore::WorkerThread* workerThread = workerGlobalScope->thread();
    WorkerRunLoop& runLoop = workerThread->runLoop();
    WebCore::WorkerLoaderProxy* workerLoaderProxy = &workerThread->workerLoaderProxy();

    String mode = "allowFileSystemMode";
    mode.append(String::number(runLoop.createUniqueId()));

    RefPtr<AllowFileSystemMainThreadBridge> bridge = AllowFileSystemMainThreadBridge::create(workerGlobalScope, workerLoaderProxy->toWebWorkerBase(), mode);

    // Either the bridge returns, or the queue gets terminated.
    // FIXME: This synchoronous execution should be replaced with better model.
    if (runLoop.runInMode(workerGlobalScope, mode) == MessageQueueTerminated) {
        bridge->cancel();
        return false;
    }

    return bridge->result();
}

void WorkerFileSystemClient::openFileSystem(ScriptExecutionContext* context, WebCore::FileSystemType type, PassOwnPtr<AsyncFileSystemCallbacks> callbacks, long long size, OpenFileSystemMode openMode)
{
    KURL storagePartition = KURL(KURL(), context->securityOrigin()->toString());
    WebKit::Platform::current()->fileSystem()->openFileSystem(storagePartition, static_cast<WebFileSystemType>(type), openMode == CreateFileSystemIfNotPresent, callbacks);
}

void WorkerFileSystemClient::deleteFileSystem(WebCore::ScriptExecutionContext*, WebCore::FileSystemType, PassOwnPtr<WebCore::AsyncFileSystemCallbacks>)
{
    ASSERT_NOT_REACHED();
}

WorkerFileSystemClient::WorkerFileSystemClient()
{
}

} // namespace WebKit