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| 1 /* | |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions are | |
| 6 * met: | |
| 7 * | |
| 8 * * Redistributions of source code must retain the above copyright | |
| 9 * notice, this list of conditions and the following disclaimer. | |
| 10 * * Redistributions in binary form must reproduce the above | |
| 11 * copyright notice, this list of conditions and the following disclaimer | |
| 12 * in the documentation and/or other materials provided with the | |
| 13 * distribution. | |
| 14 * * Neither the name of Google Inc. nor the names of its | |
| 15 * contributors may be used to endorse or promote products derived from | |
| 16 * this software without specific prior written permission. | |
| 17 * | |
| 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #include "modules/filesystem/DirectoryReader.h" | |
| 32 | |
| 33 #include "core/fileapi/FileError.h" | |
| 34 #include "modules/filesystem/EntriesCallback.h" | |
| 35 #include "modules/filesystem/Entry.h" | |
| 36 #include "modules/filesystem/ErrorCallback.h" | |
| 37 #include "modules/filesystem/FileSystemCallbacks.h" | |
| 38 | |
| 39 namespace blink { | |
| 40 | |
| 41 class DirectoryReader::EntriesCallbackHelper final : public EntriesCallback { | |
| 42 public: | |
| 43 explicit EntriesCallbackHelper(DirectoryReader* reader) : m_reader(reader) {} | |
| 44 | |
| 45 void handleEvent(const EntryHeapVector& entries) override { | |
| 46 m_reader->addEntries(entries); | |
| 47 } | |
| 48 | |
| 49 DEFINE_INLINE_VIRTUAL_TRACE() { | |
| 50 visitor->trace(m_reader); | |
| 51 EntriesCallback::trace(visitor); | |
| 52 } | |
| 53 | |
| 54 private: | |
| 55 // FIXME: This Member keeps the reader alive until all of the readDirectory | |
| 56 // results are received. crbug.com/350285 | |
| 57 Member<DirectoryReader> m_reader; | |
| 58 }; | |
| 59 | |
| 60 class DirectoryReader::ErrorCallbackHelper final : public ErrorCallbackBase { | |
| 61 public: | |
| 62 explicit ErrorCallbackHelper(DirectoryReader* reader) : m_reader(reader) {} | |
| 63 | |
| 64 void invoke(FileError::ErrorCode error) override { m_reader->onError(error); } | |
| 65 | |
| 66 DEFINE_INLINE_VIRTUAL_TRACE() { | |
| 67 visitor->trace(m_reader); | |
| 68 ErrorCallbackBase::trace(visitor); | |
| 69 } | |
| 70 | |
| 71 private: | |
| 72 Member<DirectoryReader> m_reader; | |
| 73 }; | |
| 74 | |
| 75 DirectoryReader::DirectoryReader(DOMFileSystemBase* fileSystem, | |
| 76 const String& fullPath) | |
| 77 : DirectoryReaderBase(fileSystem, fullPath), m_isReading(false) {} | |
| 78 | |
| 79 DirectoryReader::~DirectoryReader() {} | |
| 80 | |
| 81 void DirectoryReader::readEntries(EntriesCallback* entriesCallback, | |
| 82 ErrorCallback* errorCallback) { | |
| 83 if (!m_isReading) { | |
| 84 m_isReading = true; | |
| 85 filesystem()->readDirectory(this, m_fullPath, | |
| 86 new EntriesCallbackHelper(this), | |
| 87 new ErrorCallbackHelper(this)); | |
| 88 } | |
| 89 | |
| 90 if (m_error) { | |
| 91 filesystem()->reportError(ScriptErrorCallback::wrap(errorCallback), | |
| 92 m_error); | |
| 93 return; | |
| 94 } | |
| 95 | |
| 96 if (m_entriesCallback) { | |
| 97 // Non-null m_entriesCallback means multiple readEntries() calls are made | |
| 98 // concurrently. We don't allow doing it. | |
| 99 filesystem()->reportError(ScriptErrorCallback::wrap(errorCallback), | |
| 100 FileError::kInvalidStateErr); | |
| 101 return; | |
| 102 } | |
| 103 | |
| 104 if (!m_hasMoreEntries || !m_entries.isEmpty()) { | |
| 105 if (entriesCallback) | |
| 106 DOMFileSystem::scheduleCallback( | |
| 107 filesystem()->getExecutionContext(), | |
| 108 createSameThreadTask(&EntriesCallback::handleEvent, | |
| 109 wrapPersistent(entriesCallback), | |
| 110 PersistentHeapVector<Member<Entry>>(m_entries))); | |
| 111 m_entries.clear(); | |
| 112 return; | |
| 113 } | |
| 114 | |
| 115 m_entriesCallback = entriesCallback; | |
| 116 m_errorCallback = errorCallback; | |
| 117 } | |
| 118 | |
| 119 void DirectoryReader::addEntries(const EntryHeapVector& entries) { | |
| 120 m_entries.appendVector(entries); | |
| 121 m_errorCallback = nullptr; | |
| 122 if (m_entriesCallback) { | |
| 123 EntriesCallback* entriesCallback = m_entriesCallback.release(); | |
| 124 EntryHeapVector entries; | |
| 125 entries.swap(m_entries); | |
| 126 entriesCallback->handleEvent(entries); | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 void DirectoryReader::onError(FileError::ErrorCode error) { | |
| 131 m_error = error; | |
| 132 m_entriesCallback = nullptr; | |
| 133 if (m_errorCallback) | |
| 134 m_errorCallback->handleEvent(FileError::createDOMException(error)); | |
| 135 } | |
| 136 | |
| 137 DEFINE_TRACE(DirectoryReader) { | |
| 138 visitor->trace(m_entries); | |
| 139 visitor->trace(m_entriesCallback); | |
| 140 visitor->trace(m_errorCallback); | |
| 141 DirectoryReaderBase::trace(visitor); | |
| 142 } | |
| 143 | |
| 144 } // namespace blink | |
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Chromium Code Reviews
Issue 2297043002:
Web expose FileSystemFileEntry, FileSystemDirectoryEntry and friends (Closed)
