зеркало из https://github.com/mozilla/gecko-dev.git
94 строки
3.1 KiB
C++
94 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FileSystemRootDirectoryReader.h"
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#include "CallbackRunnables.h"
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#include "nsIGlobalObject.h"
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#include "mozilla/dom/FileSystemDirectoryReaderBinding.h"
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#include "mozilla/dom/FileSystemUtils.h"
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namespace mozilla::dom {
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namespace {
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class EntriesCallbackRunnable final : public Runnable {
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public:
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EntriesCallbackRunnable(FileSystemEntriesCallback* aCallback,
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const Sequence<RefPtr<FileSystemEntry>>& aEntries)
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: Runnable("EntriesCallbackRunnable"),
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mCallback(aCallback),
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mEntries(aEntries) {
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MOZ_ASSERT(aCallback);
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}
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// MOZ_CAN_RUN_SCRIPT_BOUNDARY until Runnable::Run is MOZ_CAN_RUN_SCRIPT. See
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// bug 1535398.
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MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHOD Run() override {
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Sequence<OwningNonNull<FileSystemEntry>> entries;
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for (uint32_t i = 0; i < mEntries.Length(); ++i) {
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if (!entries.AppendElement(mEntries[i].forget(), fallible)) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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mCallback->Call(entries);
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return NS_OK;
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}
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private:
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const RefPtr<FileSystemEntriesCallback> mCallback;
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Sequence<RefPtr<FileSystemEntry>> mEntries;
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};
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} // anonymous namespace
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NS_IMPL_CYCLE_COLLECTION_INHERITED(FileSystemRootDirectoryReader,
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FileSystemDirectoryReader, mEntries)
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NS_IMPL_ADDREF_INHERITED(FileSystemRootDirectoryReader,
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FileSystemDirectoryReader)
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NS_IMPL_RELEASE_INHERITED(FileSystemRootDirectoryReader,
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FileSystemDirectoryReader)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileSystemRootDirectoryReader)
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NS_INTERFACE_MAP_END_INHERITING(FileSystemDirectoryReader)
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FileSystemRootDirectoryReader::FileSystemRootDirectoryReader(
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FileSystemDirectoryEntry* aParentEntry, FileSystem* aFileSystem,
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const Sequence<RefPtr<FileSystemEntry>>& aEntries)
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: FileSystemDirectoryReader(aParentEntry, aFileSystem, nullptr),
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mEntries(aEntries),
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mAlreadyRead(false) {
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MOZ_ASSERT(aParentEntry);
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MOZ_ASSERT(aFileSystem);
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}
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FileSystemRootDirectoryReader::~FileSystemRootDirectoryReader() = default;
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void FileSystemRootDirectoryReader::ReadEntries(
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FileSystemEntriesCallback& aSuccessCallback,
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const Optional<OwningNonNull<ErrorCallback>>& aErrorCallback,
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ErrorResult& aRv) {
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if (mAlreadyRead) {
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RefPtr<EmptyEntriesCallbackRunnable> runnable =
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new EmptyEntriesCallbackRunnable(&aSuccessCallback);
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aRv =
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FileSystemUtils::DispatchRunnable(GetParentObject(), runnable.forget());
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return;
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}
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// This object can be used only once.
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mAlreadyRead = true;
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RefPtr<EntriesCallbackRunnable> runnable =
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new EntriesCallbackRunnable(&aSuccessCallback, mEntries);
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aRv = FileSystemUtils::DispatchRunnable(GetParentObject(), runnable.forget());
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}
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} // namespace mozilla::dom
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