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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "FileSystemDirectoryReader.h"
#include "CallbackRunnables.h"
#include "FileSystemFileEntry.h"
#include "js/Array.h" // JS::NewArrayObject
#include "js/PropertyAndElement.h" // JS_GetElement
#include "mozilla/dom/FileBinding.h"
#include "mozilla/dom/FileSystem.h"
#include "mozilla/dom/FileSystemDirectoryReaderBinding.h"
#include "mozilla/dom/FileSystemUtils.h"
#include "mozilla/dom/Directory.h"
#include "mozilla/dom/DirectoryBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseNativeHandler.h"
namespace mozilla::dom {
namespace {
class PromiseHandler final : public PromiseNativeHandler {
public:
NS_DECL_ISUPPORTS
PromiseHandler(FileSystemDirectoryEntry* aParentEntry,
FileSystem* aFileSystem,
FileSystemEntriesCallback* aSuccessCallback,
ErrorCallback* aErrorCallback)
: mParentEntry(aParentEntry),
mFileSystem(aFileSystem),
mSuccessCallback(aSuccessCallback),
mErrorCallback(aErrorCallback) {
MOZ_ASSERT(aParentEntry);
MOZ_ASSERT(aFileSystem);
MOZ_ASSERT(aSuccessCallback);
}
MOZ_CAN_RUN_SCRIPT
virtual void ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
ErrorResult& aRv) override {
if (NS_WARN_IF(!aValue.isObject())) {
return;
}
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
uint32_t length;
if (NS_WARN_IF(!JS::GetArrayLength(aCx, obj, &length))) {
return;
}
Sequence<OwningNonNull<FileSystemEntry>> sequence;
if (NS_WARN_IF(!sequence.SetLength(length, fallible))) {
return;
}
for (uint32_t i = 0; i < length; ++i) {
JS::Rooted<JS::Value> value(aCx);
if (NS_WARN_IF(!JS_GetElement(aCx, obj, i, &value))) {
return;
}
if (NS_WARN_IF(!value.isObject())) {
return;
}
JS::Rooted<JSObject*> valueObj(aCx, &value.toObject());
RefPtr<File> file;
if (NS_SUCCEEDED(UNWRAP_OBJECT(File, valueObj, file))) {
RefPtr<FileSystemFileEntry> entry = new FileSystemFileEntry(
mParentEntry->GetParentObject(), file, mParentEntry, mFileSystem);
sequence[i] = entry;
continue;
}
RefPtr<Directory> directory;
if (NS_WARN_IF(
NS_FAILED(UNWRAP_OBJECT(Directory, valueObj, directory)))) {
return;
}
RefPtr<FileSystemDirectoryEntry> entry =
new FileSystemDirectoryEntry(mParentEntry->GetParentObject(),
directory, mParentEntry, mFileSystem);
sequence[i] = entry;
}
mSuccessCallback->Call(sequence);
}
virtual void RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue,
ErrorResult& aRv) override {
if (mErrorCallback) {
RefPtr<ErrorCallbackRunnable> runnable = new ErrorCallbackRunnable(
mParentEntry->GetParentObject(), mErrorCallback,
NS_ERROR_DOM_INVALID_STATE_ERR);
FileSystemUtils::DispatchRunnable(mParentEntry->GetParentObject(),
runnable.forget());
}
}
private:
~PromiseHandler() = default;
RefPtr<FileSystemDirectoryEntry> mParentEntry;
RefPtr<FileSystem> mFileSystem;
const RefPtr<FileSystemEntriesCallback> mSuccessCallback;
RefPtr<ErrorCallback> mErrorCallback;
};
NS_IMPL_ISUPPORTS0(PromiseHandler);
} // anonymous namespace
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FileSystemDirectoryReader, mParentEntry,
mDirectory, mFileSystem)
NS_IMPL_CYCLE_COLLECTING_ADDREF(FileSystemDirectoryReader)
NS_IMPL_CYCLE_COLLECTING_RELEASE(FileSystemDirectoryReader)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileSystemDirectoryReader)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
FileSystemDirectoryReader::FileSystemDirectoryReader(
FileSystemDirectoryEntry* aParentEntry, FileSystem* aFileSystem,
Directory* aDirectory)
: mParentEntry(aParentEntry),
mFileSystem(aFileSystem),
mDirectory(aDirectory),
mAlreadyRead(false) {
MOZ_ASSERT(aParentEntry);
MOZ_ASSERT(aFileSystem);
}
FileSystemDirectoryReader::~FileSystemDirectoryReader() = default;
JSObject* FileSystemDirectoryReader::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
return FileSystemDirectoryReader_Binding::Wrap(aCx, this, aGivenProto);
}
void FileSystemDirectoryReader::ReadEntries(
FileSystemEntriesCallback& aSuccessCallback,
const Optional<OwningNonNull<ErrorCallback>>& aErrorCallback,
ErrorResult& aRv) {
MOZ_ASSERT(mDirectory);
if (mAlreadyRead) {
RefPtr<EmptyEntriesCallbackRunnable> runnable =
new EmptyEntriesCallbackRunnable(&aSuccessCallback);
FileSystemUtils::DispatchRunnable(GetParentObject(), runnable.forget());
return;
}
// This object can be used only once.
mAlreadyRead = true;
ErrorResult rv;
RefPtr<Promise> promise = mDirectory->GetFilesAndDirectories(rv);
if (NS_WARN_IF(rv.Failed())) {
ErrorCallbackHelper::Call(GetParentObject(), aErrorCallback,
rv.StealNSResult());
return;
}
RefPtr<PromiseHandler> handler = new PromiseHandler(
mParentEntry, mFileSystem, &aSuccessCallback,
aErrorCallback.WasPassed() ? &aErrorCallback.Value() : nullptr);
promise->AppendNativeHandler(handler);
}
} // namespace mozilla::dom
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