1/*
2 * Copyright (C) 2017 Apple 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
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "FileSystemDirectoryReader.h"
28
29#include "DOMException.h"
30#include "DOMFileSystem.h"
31#include "ErrorCallback.h"
32#include "FileSystemDirectoryEntry.h"
33#include "FileSystemEntriesCallback.h"
34#include "ScriptExecutionContext.h"
35#include <wtf/IsoMallocInlines.h>
36#include <wtf/MainThread.h>
37
38namespace WebCore {
39
40WTF_MAKE_ISO_ALLOCATED_IMPL(FileSystemDirectoryReader);
41
42FileSystemDirectoryReader::FileSystemDirectoryReader(ScriptExecutionContext& context, FileSystemDirectoryEntry& directory)
43 : ActiveDOMObject(&context)
44 , m_directory(directory)
45{
46 suspendIfNeeded();
47}
48
49FileSystemDirectoryReader::~FileSystemDirectoryReader() = default;
50
51const char* FileSystemDirectoryReader::activeDOMObjectName() const
52{
53 return "FileSystemDirectoryReader";
54}
55
56bool FileSystemDirectoryReader::canSuspendForDocumentSuspension() const
57{
58 return !hasPendingActivity();
59}
60
61// https://wicg.github.io/entries-api/#dom-filesystemdirectoryentry-readentries
62void FileSystemDirectoryReader::readEntries(ScriptExecutionContext& context, Ref<FileSystemEntriesCallback>&& successCallback, RefPtr<ErrorCallback>&& errorCallback)
63{
64 if (m_isReading) {
65 if (errorCallback)
66 errorCallback->scheduleCallback(context, DOMException::create(Exception { InvalidStateError, "Directory reader is already reading"_s }));
67 return;
68 }
69
70 if (m_error) {
71 if (errorCallback)
72 errorCallback->scheduleCallback(context, DOMException::create(*m_error));
73 return;
74 }
75
76 if (m_isDone) {
77 successCallback->scheduleCallback(context, { });
78 return;
79 }
80
81 m_isReading = true;
82 auto pendingActivity = makePendingActivity(*this);
83 callOnMainThread([this, context = makeRef(context), successCallback = WTFMove(successCallback), errorCallback = WTFMove(errorCallback), pendingActivity = WTFMove(pendingActivity)]() mutable {
84 m_isReading = false;
85 m_directory->filesystem().listDirectory(context, m_directory, [this, successCallback = WTFMove(successCallback), errorCallback = WTFMove(errorCallback), pendingActivity = WTFMove(pendingActivity)](ExceptionOr<Vector<Ref<FileSystemEntry>>>&& result) {
86 if (result.hasException()) {
87 m_error = result.releaseException();
88 if (errorCallback)
89 errorCallback->handleEvent(DOMException::create(*m_error));
90 return;
91 }
92 m_isDone = true;
93 successCallback->handleEvent(result.releaseReturnValue());
94 });
95 });
96}
97
98} // namespace WebCore
99