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authorSteve Block <steveblock@google.com>2011-05-13 06:44:40 -0700
committerAndroid (Google) Code Review <android-gerrit@google.com>2011-05-13 06:44:40 -0700
commit08014c20784f3db5df3a89b73cce46037b77eb59 (patch)
tree47749210d31e19e6e2f64036fa8fae2ad693476f /Source/WebCore/fileapi/SyncCallbackHelper.h
parent860220379e56aeb66424861ad602b07ee22b4055 (diff)
parent4c3661f7918f8b3f139f824efb7855bedccb4c94 (diff)
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Merge changes Ide388898,Ic49f367c,I1158a808,Iacb6ca5d,I2100dd3a,I5c1abe54,Ib0ef9902,I31dbc523,I570314b3
* changes: Merge WebKit at r75315: Update WebKit version Merge WebKit at r75315: Add FrameLoaderClient PageCache stubs Merge WebKit at r75315: Stub out AXObjectCache::remove() Merge WebKit at r75315: Fix ImageBuffer Merge WebKit at r75315: Fix PluginData::initPlugins() Merge WebKit at r75315: Fix conflicts Merge WebKit at r75315: Fix Makefiles Merge WebKit at r75315: Move Android-specific WebCore files to Source Merge WebKit at r75315: Initial merge by git.
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diff --git a/Source/WebCore/fileapi/SyncCallbackHelper.h b/Source/WebCore/fileapi/SyncCallbackHelper.h
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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 SyncCallbackHelper_h
+#define SyncCallbackHelper_h
+
+#if ENABLE(FILE_SYSTEM)
+
+#include "DirectoryEntry.h"
+#include "EntriesCallback.h"
+#include "EntryArraySync.h"
+#include "EntryCallback.h"
+#include "ErrorCallback.h"
+#include "ExceptionCode.h"
+#include "FileEntry.h"
+#include "FileError.h"
+#include "FileException.h"
+#include "FileSystemCallback.h"
+#include "MetadataCallback.h"
+#include "VoidCallback.h"
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefCounted.h>
+
+namespace WebCore {
+
+class AsyncFileSystem;
+class DirectoryEntrySync;
+class EntryArraySync;
+class EntrySync;
+class FileEntrySync;
+
+// A helper template for FileSystemSync implementation.
+template <typename SuccessCallback, typename ObserverType, typename CallbackArg, typename ResultType>
+class SyncCallbackHelper : public Noncopyable {
+public:
+ typedef SyncCallbackHelper<SuccessCallback, ObserverType, CallbackArg, ResultType> HelperType;
+ SyncCallbackHelper(ObserverType* observer = 0)
+ : m_observer(observer)
+ , m_successCallback(SuccessCallbackImpl::create(this))
+ , m_errorCallback(ErrorCallbackImpl::create(this))
+ , m_exceptionCode(0)
+ , m_completed(false)
+ {
+ }
+
+ PassRefPtr<ResultType> getResult(ExceptionCode& ec)
+ {
+ if (m_observer) {
+ while (!m_completed) {
+ if (!m_observer->waitForOperationToComplete()) {
+ m_exceptionCode = FileException::ABORT_ERR;
+ break;
+ }
+ }
+ }
+ ec = m_exceptionCode;
+ return m_result.release();
+ }
+
+ PassRefPtr<SuccessCallback> successCallback() { return m_successCallback; }
+ PassRefPtr<ErrorCallback> errorCallback() { return m_errorCallback; }
+
+private:
+ class SuccessCallbackImpl : public SuccessCallback {
+ public:
+ static PassRefPtr<SuccessCallbackImpl> create(HelperType* helper)
+ {
+ return adoptRef(new SuccessCallbackImpl(helper));
+ }
+
+ virtual void handleEvent()
+ {
+ m_helper->setError(0);
+ }
+
+ virtual bool handleEvent(CallbackArg* arg)
+ {
+ m_helper->setResult(ResultType::create(arg));
+ return true;
+ }
+
+ private:
+ SuccessCallbackImpl(HelperType* helper)
+ : m_helper(helper)
+ {
+ }
+ HelperType* m_helper;
+ };
+
+ class ErrorCallbackImpl : public ErrorCallback {
+ public:
+ static PassRefPtr<ErrorCallbackImpl> create(HelperType* helper)
+ {
+ return adoptRef(new ErrorCallbackImpl(helper));
+ }
+
+ virtual bool handleEvent(FileError* error)
+ {
+ ASSERT(error);
+ m_helper->setError(error->code());
+ return true;
+ }
+
+ private:
+ ErrorCallbackImpl(HelperType* helper)
+ : m_helper(helper)
+ {
+ }
+ HelperType* m_helper;
+ };
+
+ friend class SuccessCallbackImpl;
+ friend class ErrorCallbackImpl;
+
+ void setError(int code)
+ {
+ m_exceptionCode = FileException::ErrorCodeToExceptionCode(code);
+ m_completed = true;
+ }
+
+ void setResult(PassRefPtr<ResultType> result)
+ {
+ m_result = result;
+ m_completed = true;
+ }
+
+ ObserverType* m_observer;
+ RefPtr<SuccessCallbackImpl> m_successCallback;
+ RefPtr<ErrorCallbackImpl> m_errorCallback;
+ RefPtr<ResultType> m_result;
+ ExceptionCode m_exceptionCode;
+ bool m_completed;
+};
+
+struct EmptyType : public RefCounted<EmptyType> {
+ static PassRefPtr<EmptyType> create(EmptyType*)
+ {
+ return 0;
+ }
+};
+
+struct EmptyObserverType {
+ bool waitForOperationToComplete()
+ {
+ return false;
+ }
+};
+
+typedef SyncCallbackHelper<EntryCallback, AsyncFileSystem, Entry, EntrySync> EntrySyncCallbackHelper;
+typedef SyncCallbackHelper<EntriesCallback, AsyncFileSystem, EntryArray, EntryArraySync> EntriesSyncCallbackHelper;
+typedef SyncCallbackHelper<MetadataCallback, AsyncFileSystem, Metadata, Metadata> MetadataSyncCallbackHelper;
+typedef SyncCallbackHelper<VoidCallback, AsyncFileSystem, EmptyType, EmptyType> VoidSyncCallbackHelper;
+typedef SyncCallbackHelper<FileSystemCallback, EmptyObserverType, DOMFileSystem, DOMFileSystemSync> FileSystemSyncCallbackHelper;
+
+} // namespace WebCore
+
+#endif // ENABLE(FILE_SYSTEM)
+
+#endif // SyncCallbackHelper_h