| /* |
| * 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. |
| */ |
| |
| #include "config.h" |
| #include "modules/filesystem/DirectoryReader.h" |
| |
| #include "core/fileapi/FileError.h" |
| #include "modules/filesystem/EntriesCallback.h" |
| #include "modules/filesystem/Entry.h" |
| #include "modules/filesystem/ErrorCallback.h" |
| |
| namespace blink { |
| |
| class DirectoryReader::EntriesCallbackHelper : public EntriesCallback { |
| public: |
| explicit EntriesCallbackHelper(DirectoryReader* reader) |
| : m_reader(reader) |
| { |
| } |
| |
| virtual void handleEvent(const EntryHeapVector& entries) OVERRIDE |
| { |
| m_reader->addEntries(entries); |
| } |
| |
| private: |
| // FIXME: This Persistent keeps the reader alive until all of the readDirectory results are received. crbug.com/350285 |
| Persistent<DirectoryReader> m_reader; |
| }; |
| |
| class DirectoryReader::ErrorCallbackHelper : public ErrorCallback { |
| public: |
| explicit ErrorCallbackHelper(DirectoryReader* reader) |
| : m_reader(reader) |
| { |
| } |
| |
| virtual void handleEvent(FileError* error) OVERRIDE |
| { |
| m_reader->onError(error); |
| } |
| |
| private: |
| Persistent<DirectoryReader> m_reader; |
| }; |
| |
| DirectoryReader::DirectoryReader(DOMFileSystemBase* fileSystem, const String& fullPath) |
| : DirectoryReaderBase(fileSystem, fullPath) |
| , m_isReading(false) |
| { |
| ScriptWrappable::init(this); |
| } |
| |
| DirectoryReader::~DirectoryReader() |
| { |
| } |
| |
| void DirectoryReader::readEntries(PassOwnPtr<EntriesCallback> entriesCallback, PassOwnPtr<ErrorCallback> errorCallback) |
| { |
| if (!m_isReading) { |
| m_isReading = true; |
| filesystem()->readDirectory(this, m_fullPath, adoptPtr(new EntriesCallbackHelper(this)), adoptPtr(new ErrorCallbackHelper(this))); |
| } |
| |
| if (m_error) { |
| filesystem()->scheduleCallback(errorCallback, PassRefPtrWillBeRawPtr<FileError>(m_error.get())); |
| return; |
| } |
| |
| if (m_entriesCallback) { |
| // Non-null m_entriesCallback means multiple readEntries() calls are made concurrently. We don't allow doing it. |
| filesystem()->scheduleCallback(errorCallback, FileError::create(FileError::INVALID_STATE_ERR)); |
| return; |
| } |
| |
| if (!m_hasMoreEntries || !m_entries.isEmpty()) { |
| filesystem()->scheduleCallback(entriesCallback, m_entries); |
| m_entries.clear(); |
| return; |
| } |
| |
| m_entriesCallback = entriesCallback; |
| m_errorCallback = errorCallback; |
| } |
| |
| void DirectoryReader::addEntries(const EntryHeapVector& entries) |
| { |
| m_entries.appendVector(entries); |
| m_errorCallback = nullptr; |
| if (m_entriesCallback) { |
| OwnPtr<EntriesCallback> entriesCallback = m_entriesCallback.release(); |
| EntryHeapVector entries; |
| entries.swap(m_entries); |
| entriesCallback->handleEvent(entries); |
| } |
| } |
| |
| void DirectoryReader::onError(FileError* error) |
| { |
| m_error = error; |
| m_entriesCallback = nullptr; |
| if (m_errorCallback) { |
| OwnPtr<ErrorCallback> errorCallback = m_errorCallback.release(); |
| errorCallback->handleEvent(error); |
| } |
| } |
| |
| void DirectoryReader::trace(Visitor* visitor) |
| { |
| visitor->trace(m_entries); |
| visitor->trace(m_error); |
| DirectoryReaderBase::trace(visitor); |
| } |
| |
| } |