| /* |
| * 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 THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_SYNC_CALLBACK_HELPER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_SYNC_CALLBACK_HELPER_H_ |
| |
| #include "third_party/blink/renderer/core/fileapi/file_error.h" |
| #include "third_party/blink/renderer/modules/filesystem/file_system_callbacks.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| |
| namespace blink { |
| |
| // Helper class to support DOMFileSystemSync implementation. |
| template <typename SuccessCallback, typename CallbackArg> |
| class DOMFileSystemCallbacksSyncHelper final |
| : public GarbageCollected< |
| DOMFileSystemCallbacksSyncHelper<SuccessCallback, CallbackArg>> { |
| public: |
| static DOMFileSystemCallbacksSyncHelper* Create() { |
| return MakeGarbageCollected<DOMFileSystemCallbacksSyncHelper>(); |
| } |
| |
| DOMFileSystemCallbacksSyncHelper() = default; |
| |
| void Trace(blink::Visitor* visitor) { visitor->Trace(result_); } |
| |
| SuccessCallback* GetSuccessCallback() { |
| return new SuccessCallbackImpl(this); |
| } |
| ErrorCallbackBase* GetErrorCallback() { |
| return MakeGarbageCollected<ErrorCallbackImpl>(this); |
| } |
| |
| CallbackArg* GetResultOrThrow(ExceptionState& exception_state) { |
| if (error_code_ != base::File::FILE_OK) { |
| file_error::ThrowDOMException(exception_state, error_code_); |
| return nullptr; |
| } |
| |
| return result_; |
| } |
| |
| private: |
| class SuccessCallbackImpl final : public SuccessCallback { |
| public: |
| void Trace(blink::Visitor* visitor) override { |
| visitor->Trace(helper_); |
| SuccessCallback::Trace(visitor); |
| } |
| void OnSuccess(CallbackArg* arg) override { |
| DCHECK(arg); |
| helper_->result_ = arg; |
| } |
| |
| private: |
| explicit SuccessCallbackImpl(DOMFileSystemCallbacksSyncHelper* helper) |
| : helper_(helper) {} |
| Member<DOMFileSystemCallbacksSyncHelper> helper_; |
| |
| friend class DOMFileSystemCallbacksSyncHelper; |
| }; |
| |
| class ErrorCallbackImpl final : public ErrorCallbackBase { |
| public: |
| explicit ErrorCallbackImpl(DOMFileSystemCallbacksSyncHelper* helper) |
| : helper_(helper) {} |
| |
| void Trace(blink::Visitor* visitor) override { |
| visitor->Trace(helper_); |
| ErrorCallbackBase::Trace(visitor); |
| } |
| void Invoke(base::File::Error error_code) override { |
| DCHECK_NE(error_code, base::File::FILE_OK); |
| helper_->error_code_ = error_code; |
| } |
| |
| private: |
| Member<DOMFileSystemCallbacksSyncHelper> helper_; |
| |
| friend class DOMFileSystemCallbacksSyncHelper; |
| }; |
| |
| Member<CallbackArg> result_; |
| base::File::Error error_code_ = base::File::FILE_OK; |
| |
| friend class SuccessCallbackImpl; |
| friend class ErrorCallbackImpl; |
| }; |
| |
| using EntryCallbacksSyncHelper = |
| DOMFileSystemCallbacksSyncHelper<EntryCallbacks::OnDidGetEntryCallback, |
| Entry>; |
| |
| using FileSystemCallbacksSyncHelper = DOMFileSystemCallbacksSyncHelper< |
| FileSystemCallbacks::OnDidOpenFileSystemCallback, |
| DOMFileSystem>; |
| |
| using FileWriterCallbacksSyncHelper = DOMFileSystemCallbacksSyncHelper< |
| FileWriterCallbacks::OnDidCreateFileWriterCallback, |
| FileWriterBase>; |
| |
| using MetadataCallbacksSyncHelper = DOMFileSystemCallbacksSyncHelper< |
| MetadataCallbacks::OnDidReadMetadataCallback, |
| Metadata>; |
| |
| using VoidCallbacksSyncHelper = DOMFileSystemCallbacksSyncHelper< |
| VoidCallbacks::OnDidSucceedCallback, |
| ExecutionContext /* dummy_arg_for_sync_helper */>; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_FILESYSTEM_SYNC_CALLBACK_HELPER_H_ |