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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/ClipboardReadRequestParent.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/net/CookieJarSettings.h"
#include "nsComponentManagerUtils.h"
#include "nsIClipboard.h"
#include "nsITransferable.h"
#include "nsThreadManager.h"
#include "nsWidgetsCID.h"
using mozilla::dom::ContentParent;
using mozilla::ipc::IPCResult;
namespace mozilla {
namespace {
class ClipboardGetDataCallback final : public nsIAsyncClipboardRequestCallback {
public:
explicit ClipboardGetDataCallback(std::function<void(nsresult)>&& aCallback)
: mCallback(std::move(aCallback)) {}
// This object will never be held by a cycle-collected object, so it doesn't
// need to be cycle-collected despite holding alive cycle-collected objects.
NS_DECL_ISUPPORTS
// nsIAsyncClipboardRequestCallback
NS_IMETHOD OnComplete(nsresult aResult) override {
mCallback(aResult);
return NS_OK;
}
protected:
~ClipboardGetDataCallback() = default;
std::function<void(nsresult)> mCallback;
};
NS_IMPL_ISUPPORTS(ClipboardGetDataCallback, nsIAsyncClipboardRequestCallback)
static Result<nsCOMPtr<nsITransferable>, nsresult> CreateTransferable(
const nsTArray<nsCString>& aTypes) {
nsresult rv;
nsCOMPtr<nsITransferable> trans =
do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
if (NS_FAILED(rv)) {
return Err(rv);
}
MOZ_TRY(trans->Init(nullptr));
// The private flag is only used to prevent the data from being cached to the
// disk. The flag is not exported to the IPCDataTransfer object.
// The flag is set because we are not sure whether the clipboard data is used
// in a private browsing context. The transferable is only used in this scope,
// so the cache would not reduce memory consumption anyway.
trans->SetIsPrivateData(true);
// Fill out flavors for transferable
for (uint32_t t = 0; t < aTypes.Length(); t++) {
MOZ_TRY(trans->AddDataFlavor(aTypes[t].get()));
}
return std::move(trans);
}
} // namespace
IPCResult ClipboardReadRequestParent::RecvGetData(
const nsTArray<nsCString>& aFlavors, GetDataResolver&& aResolver) {
bool valid = false;
if (NS_FAILED(mClipboardDataSnapshot->GetValid(&valid)) || !valid) {
(void)PClipboardReadRequestParent::Send__delete__(this);
aResolver(NS_ERROR_NOT_AVAILABLE);
return IPC_OK();
}
// Create transferable
auto result = CreateTransferable(aFlavors);
if (result.isErr()) {
aResolver(result.unwrapErr());
return IPC_OK();
}
nsCOMPtr<nsITransferable> trans = result.unwrap();
RefPtr<ClipboardGetDataCallback> callback =
MakeRefPtr<ClipboardGetDataCallback>([self = RefPtr{this},
resolver = std::move(aResolver),
trans,
manager = mManager](nsresult aRv) {
if (NS_FAILED(aRv)) {
bool valid = false;
if (NS_FAILED(self->mClipboardDataSnapshot->GetValid(&valid)) ||
!valid) {
(void)PClipboardReadRequestParent::Send__delete__(self);
}
resolver(aRv);
return;
}
dom::IPCTransferableData ipcTransferableData;
nsContentUtils::TransferableToIPCTransferableData(
trans, &ipcTransferableData, false /* aInSyncMessage */, manager);
resolver(std::move(ipcTransferableData));
});
nsresult rv = mClipboardDataSnapshot->GetData(trans, callback);
if (NS_FAILED(rv)) {
callback->OnComplete(rv);
}
return IPC_OK();
}
IPCResult ClipboardReadRequestParent::RecvGetDataSync(
const nsTArray<nsCString>& aFlavors,
dom::IPCTransferableDataOrError* aTransferableDataOrError) {
auto destroySoon = [&] {
// Delete this actor, but don't do it in the middle of this sync IPC call
// Make sure nothing else gets processed before this deletion, so use
// DispatchDirectTaskToCurrentThread()
RefPtr<nsIRunnable> task = NS_NewRunnableFunction(
"ClipboardReadRequestParent_SyncError", [self = RefPtr{this}]() {
(void)PClipboardReadRequestParent::Send__delete__(self);
});
nsThreadManager::get().DispatchDirectTaskToCurrentThread(task);
};
bool valid = false;
if (NS_FAILED(mClipboardDataSnapshot->GetValid(&valid)) || !valid) {
destroySoon();
*aTransferableDataOrError = NS_ERROR_NOT_AVAILABLE;
return IPC_OK();
}
// Create transferable
auto result = CreateTransferable(aFlavors);
if (result.isErr()) {
*aTransferableDataOrError = result.unwrapErr();
return IPC_OK();
}
nsCOMPtr<nsITransferable> trans = result.unwrap();
nsresult rv = mClipboardDataSnapshot->GetDataSync(trans);
if (NS_FAILED(rv)) {
*aTransferableDataOrError = rv;
if (NS_FAILED(mClipboardDataSnapshot->GetValid(&valid)) || !valid) {
destroySoon();
}
return IPC_OK();
}
dom::IPCTransferableData ipcTransferableData;
nsContentUtils::TransferableToIPCTransferableData(
trans, &ipcTransferableData, true /* aInSyncMessage */, mManager);
*aTransferableDataOrError = std::move(ipcTransferableData);
return IPC_OK();
}
} // namespace mozilla
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