third_party/WebKit/Source/modules/filesystem/DirectoryReaderSync.cpp

   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 "config.h"
  32 #include "modules/filesystem/DirectoryReaderSync.h"
  33
  34 #include "bindings/core/v8/ExceptionState.h"
  35 #include "core/dom/ExceptionCode.h"
  36 #include "modules/filesystem/DirectoryEntry.h"
  37 #include "modules/filesystem/DirectoryEntrySync.h"
  38 #include "modules/filesystem/EntriesCallback.h"
  39 #include "modules/filesystem/EntrySync.h"
  40 #include "modules/filesystem/ErrorCallback.h"
  41 #include "modules/filesystem/FileEntrySync.h"
  42
  43 namespace blink {
  44
  45 class DirectoryReaderSync::EntriesCallbackHelper final : public EntriesCallback {
  46 public:
  47     explicit EntriesCallbackHelper(DirectoryReaderSync* reader)
  48         : m_reader(reader)
  49     {
  50     }
  51
  52     void handleEvent(const EntryHeapVector& entries) override
  53     {
  54         EntrySyncHeapVector syncEntries;
  55         syncEntries.reserveInitialCapacity(entries.size());
  56         for (size_t i = 0; i < entries.size(); ++i)
  57             syncEntries.uncheckedAppend(EntrySync::create(entries[i].get()));
  58         m_reader->addEntries(syncEntries);
  59     }
  60
  61     DEFINE_INLINE_VIRTUAL_TRACE()
  62     {
  63         visitor->trace(m_reader);
  64         EntriesCallback::trace(visitor);
  65     }
  66
  67 private:
  68     Member<DirectoryReaderSync> m_reader;
  69 };
  70
  71 class DirectoryReaderSync::ErrorCallbackHelper final : public ErrorCallback {
  72 public:
  73     explicit ErrorCallbackHelper(DirectoryReaderSync* reader)
  74         : m_reader(reader)
  75     {
  76     }
  77
  78     void handleEvent(FileError* error) override
  79     {
  80         m_reader->setError(error->code());
  81     }
  82
  83     DEFINE_INLINE_VIRTUAL_TRACE()
  84     {
  85         visitor->trace(m_reader);
  86         ErrorCallback::trace(visitor);
  87     }
  88
  89 private:
  90     Member<DirectoryReaderSync> m_reader;
  91 };
  92
  93 DirectoryReaderSync::DirectoryReaderSync(DOMFileSystemBase* fileSystem, const String& fullPath)
  94     : DirectoryReaderBase(fileSystem, fullPath)
  95     , m_callbacksId(0)
  96     , m_errorCode(FileError::OK)
  97 {
  98 }
  99
 100 DirectoryReaderSync::~DirectoryReaderSync()
 101 {
 102 }
 103
 104 EntrySyncHeapVector DirectoryReaderSync::readEntries(ExceptionState& exceptionState)
 105 {
 106     if (!m_callbacksId) {
 107         m_callbacksId = filesystem()->readDirectory(this, m_fullPath, new EntriesCallbackHelper(this), new ErrorCallbackHelper(this), DOMFileSystemBase::Synchronous);
 108     }
 109
 110     if (m_errorCode == FileError::OK && m_hasMoreEntries && m_entries.isEmpty())
 111         m_fileSystem->waitForAdditionalResult(m_callbacksId);
 112
 113     if (m_errorCode != FileError::OK) {
 114         FileError::throwDOMException(exceptionState, m_errorCode);
 115         return EntrySyncHeapVector();
 116     }
 117
 118     EntrySyncHeapVector result;
 119     result.swap(m_entries);
 120     return result;
 121 }
 122
 123 DEFINE_TRACE(DirectoryReaderSync)
 124 {
 125     visitor->trace(m_entries);
 126     DirectoryReaderBase::trace(visitor);
 127 }
 128
 129 } // namespace