mirror of
https://github.com/mozilla/gecko-dev.git
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116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ClipboardReadRequestParent.h"
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#include "mozilla/dom/ContentParent.h"
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#include "mozilla/net/CookieJarSettings.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIClipboard.h"
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#include "nsITransferable.h"
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#include "nsWidgetsCID.h"
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using mozilla::dom::ContentParent;
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using mozilla::ipc::IPCResult;
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namespace mozilla {
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namespace {
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class ClipboardGetDataCallback final : public nsIAsyncClipboardRequestCallback {
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public:
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explicit ClipboardGetDataCallback(std::function<void(nsresult)>&& aCallback)
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: mCallback(std::move(aCallback)) {}
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// This object will never be held by a cycle-collected object, so it doesn't
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// need to be cycle-collected despite holding alive cycle-collected objects.
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NS_DECL_ISUPPORTS
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// nsIAsyncClipboardRequestCallback
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NS_IMETHOD OnComplete(nsresult aResult) override {
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mCallback(aResult);
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return NS_OK;
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}
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protected:
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~ClipboardGetDataCallback() = default;
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std::function<void(nsresult)> mCallback;
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};
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NS_IMPL_ISUPPORTS(ClipboardGetDataCallback, nsIAsyncClipboardRequestCallback)
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static Result<nsCOMPtr<nsITransferable>, nsresult> CreateTransferable(
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const nsTArray<nsCString>& aTypes) {
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nsresult rv;
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nsCOMPtr<nsITransferable> trans =
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do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
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if (NS_FAILED(rv)) {
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return Err(rv);
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}
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MOZ_TRY(trans->Init(nullptr));
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// The private flag is only used to prevent the data from being cached to the
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// disk. The flag is not exported to the IPCDataTransfer object.
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// The flag is set because we are not sure whether the clipboard data is used
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// in a private browsing context. The transferable is only used in this scope,
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// so the cache would not reduce memory consumption anyway.
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trans->SetIsPrivateData(true);
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// Fill out flavors for transferable
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for (uint32_t t = 0; t < aTypes.Length(); t++) {
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MOZ_TRY(trans->AddDataFlavor(aTypes[t].get()));
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}
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return std::move(trans);
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}
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} // namespace
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IPCResult ClipboardReadRequestParent::RecvGetData(
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const nsTArray<nsCString>& aFlavors, GetDataResolver&& aResolver) {
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bool valid = false;
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if (NS_FAILED(mClipboardDataSnapshot->GetValid(&valid)) || !valid) {
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Unused << PClipboardReadRequestParent::Send__delete__(this);
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aResolver(NS_ERROR_FAILURE);
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return IPC_OK();
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}
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// Create transferable
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auto result = CreateTransferable(aFlavors);
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if (result.isErr()) {
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aResolver(result.unwrapErr());
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return IPC_OK();
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}
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nsCOMPtr<nsITransferable> trans = result.unwrap();
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RefPtr<ClipboardGetDataCallback> callback =
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MakeRefPtr<ClipboardGetDataCallback>([self = RefPtr{this},
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resolver = std::move(aResolver),
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trans,
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manager = mManager](nsresult aRv) {
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if (NS_FAILED(aRv)) {
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bool valid = false;
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if (NS_FAILED(self->mClipboardDataSnapshot->GetValid(&valid)) ||
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!valid) {
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Unused << PClipboardReadRequestParent::Send__delete__(self);
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}
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resolver(aRv);
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return;
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}
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dom::IPCTransferableData ipcTransferableData;
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nsContentUtils::TransferableToIPCTransferableData(
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trans, &ipcTransferableData, false /* aInSyncMessage */, manager);
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resolver(std::move(ipcTransferableData));
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});
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nsresult rv = mClipboardDataSnapshot->GetData(trans, callback);
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if (NS_FAILED(rv)) {
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callback->OnComplete(rv);
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}
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return IPC_OK();
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}
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} // namespace mozilla
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