| /* |
| * Copyright (C) 2010 Google Inc. All rights reserved. |
| * Copyright (C) 2013 Samsung Electronics. 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 |
| |
| #include "bindings/v8/ExceptionState.h" |
| #include "core/fileapi/FileError.h" |
| #include "core/html/VoidCallback.h" |
| #include "modules/filesystem/DirectoryEntry.h" |
| #include "modules/filesystem/DirectoryReaderSync.h" |
| #include "modules/filesystem/EntriesCallback.h" |
| #include "modules/filesystem/EntryCallback.h" |
| #include "modules/filesystem/EntrySync.h" |
| #include "modules/filesystem/ErrorCallback.h" |
| #include "modules/filesystem/FileEntry.h" |
| #include "modules/filesystem/FileSystemCallback.h" |
| #include "modules/filesystem/MetadataCallback.h" |
| #include "wtf/PassRefPtr.h" |
| #include "wtf/RefCounted.h" |
| |
| namespace WebCore { |
| |
| template <typename ResultType, typename CallbackArg> |
| struct HelperResultType { |
| typedef PassRefPtr<ResultType> ReturnType; |
| typedef RefPtr<ResultType> StorageType; |
| |
| static ReturnType createFromCallbackArg(CallbackArg argument) |
| { |
| return ResultType::create(argument); |
| } |
| }; |
| |
| template <> |
| struct HelperResultType<EntrySyncVector, const EntryVector&> { |
| typedef EntrySyncVector ReturnType; |
| typedef EntrySyncVector StorageType; |
| |
| static EntrySyncVector createFromCallbackArg(const EntryVector& entries) |
| { |
| EntrySyncVector result; |
| size_t entryCount = entries.size(); |
| result.reserveInitialCapacity(entryCount); |
| for (size_t i = 0; i < entryCount; ++i) |
| result.uncheckedAppend(EntrySync::create(entries[i].get())); |
| return result; |
| } |
| }; |
| |
| // A helper template for FileSystemSync implementation. |
| template <typename SuccessCallback, typename CallbackArg, typename ResultType> |
| class SyncCallbackHelper { |
| WTF_MAKE_NONCOPYABLE(SyncCallbackHelper); |
| public: |
| typedef SyncCallbackHelper<SuccessCallback, CallbackArg, ResultType> HelperType; |
| typedef HelperResultType<ResultType, CallbackArg> ResultTypeTrait; |
| typedef typename ResultTypeTrait::StorageType ResultStorageType; |
| typedef typename ResultTypeTrait::ReturnType ResultReturnType; |
| |
| SyncCallbackHelper() |
| : m_successCallback(SuccessCallbackImpl::create(this)) |
| , m_errorCallback(ErrorCallbackImpl::create(this)) |
| , m_errorCode(FileError::OK) |
| , m_completed(false) |
| { |
| } |
| |
| ResultReturnType getResult(ExceptionState& es) |
| { |
| if (m_errorCode) |
| FileError::throwDOMException(es, m_errorCode); |
| |
| return m_result; |
| } |
| |
| 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 bool handleEvent() |
| { |
| m_helper->setError(FileError::OK); |
| return true; |
| } |
| |
| virtual bool handleEvent(CallbackArg arg) |
| { |
| m_helper->setResult(arg); |
| return true; |
| } |
| |
| private: |
| explicit 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: |
| explicit ErrorCallbackImpl(HelperType* helper) |
| : m_helper(helper) |
| { |
| } |
| HelperType* m_helper; |
| }; |
| |
| friend class SuccessCallbackImpl; |
| friend class ErrorCallbackImpl; |
| |
| void setError(FileError::ErrorCode code) |
| { |
| m_errorCode = code; |
| m_completed = true; |
| } |
| |
| void setResult(CallbackArg result) |
| { |
| m_result = ResultTypeTrait::createFromCallbackArg(result); |
| m_completed = true; |
| } |
| |
| RefPtr<SuccessCallbackImpl> m_successCallback; |
| RefPtr<ErrorCallbackImpl> m_errorCallback; |
| ResultStorageType m_result; |
| FileError::ErrorCode m_errorCode; |
| bool m_completed; |
| }; |
| |
| struct EmptyType : public RefCounted<EmptyType> { |
| static PassRefPtr<EmptyType> create(EmptyType*) |
| { |
| return 0; |
| } |
| }; |
| |
| typedef SyncCallbackHelper<EntryCallback, Entry*, EntrySync> EntrySyncCallbackHelper; |
| typedef SyncCallbackHelper<EntriesCallback, const EntryVector&, EntrySyncVector> EntriesSyncCallbackHelper; |
| typedef SyncCallbackHelper<MetadataCallback, Metadata*, Metadata> MetadataSyncCallbackHelper; |
| typedef SyncCallbackHelper<VoidCallback, EmptyType*, EmptyType> VoidSyncCallbackHelper; |
| typedef SyncCallbackHelper<FileSystemCallback, DOMFileSystem*, DOMFileSystemSync> FileSystemSyncCallbackHelper; |
| |
| } // namespace WebCore |
| |
| #endif // SyncCallbackHelper_h |