зеркало из https://github.com/mozilla/gecko-dev.git
418 строки
14 KiB
C++
418 строки
14 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 "nsBaseClipboard.h"
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#include "mozilla/StaticPrefs_widget.h"
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#include "nsIClipboardOwner.h"
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#include "nsError.h"
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#include "nsXPCOM.h"
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using mozilla::GenericPromise;
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using mozilla::LogLevel;
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using mozilla::UniquePtr;
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using mozilla::dom::ClipboardCapabilities;
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NS_IMPL_ISUPPORTS(ClipboardSetDataHelper::AsyncSetClipboardData,
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nsIAsyncSetClipboardData)
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ClipboardSetDataHelper::AsyncSetClipboardData::AsyncSetClipboardData(
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int32_t aClipboardType, ClipboardSetDataHelper* aClipboard,
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nsIAsyncSetClipboardDataCallback* aCallback)
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: mClipboardType(aClipboardType),
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mClipboard(aClipboard),
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mCallback(aCallback) {
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MOZ_ASSERT(mClipboard);
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MOZ_ASSERT(mClipboard->IsClipboardTypeSupported(mClipboardType));
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}
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NS_IMETHODIMP
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ClipboardSetDataHelper::AsyncSetClipboardData::SetData(
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nsITransferable* aTransferable, nsIClipboardOwner* aOwner) {
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if (!IsValid()) {
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return NS_ERROR_FAILURE;
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}
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MOZ_ASSERT(mClipboard);
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MOZ_ASSERT(mClipboard->IsClipboardTypeSupported(mClipboardType));
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MOZ_DIAGNOSTIC_ASSERT(mClipboard->mPendingWriteRequests[mClipboardType] ==
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this);
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RefPtr<AsyncSetClipboardData> request =
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std::move(mClipboard->mPendingWriteRequests[mClipboardType]);
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nsresult rv = mClipboard->SetData(aTransferable, aOwner, mClipboardType);
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MaybeNotifyCallback(rv);
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return rv;
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}
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NS_IMETHODIMP
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ClipboardSetDataHelper::AsyncSetClipboardData::Abort(nsresult aReason) {
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// Note: This may be called during destructor, so it should not attempt to
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// take a reference to mClipboard.
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if (!IsValid() || !NS_FAILED(aReason)) {
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return NS_ERROR_FAILURE;
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}
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MaybeNotifyCallback(aReason);
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return NS_OK;
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}
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void ClipboardSetDataHelper::AsyncSetClipboardData::MaybeNotifyCallback(
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nsresult aResult) {
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// Note: This may be called during destructor, so it should not attempt to
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// take a reference to mClipboard.
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MOZ_ASSERT(IsValid());
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if (nsCOMPtr<nsIAsyncSetClipboardDataCallback> callback =
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mCallback.forget()) {
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callback->OnComplete(aResult);
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}
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// Once the callback is notified, setData should not be allowed, so invalidate
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// this request.
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mClipboard = nullptr;
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}
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NS_IMPL_ISUPPORTS(ClipboardSetDataHelper, nsIClipboard)
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ClipboardSetDataHelper::~ClipboardSetDataHelper() {
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for (auto& request : mPendingWriteRequests) {
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if (request) {
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request->Abort(NS_ERROR_ABORT);
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request = nullptr;
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}
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}
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}
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void ClipboardSetDataHelper::RejectPendingAsyncSetDataRequestIfAny(
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int32_t aClipboardType) {
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MOZ_ASSERT(nsIClipboard::IsClipboardTypeSupported(aClipboardType));
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auto& request = mPendingWriteRequests[aClipboardType];
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if (request) {
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request->Abort(NS_ERROR_ABORT);
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request = nullptr;
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}
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}
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NS_IMETHODIMP
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ClipboardSetDataHelper::SetData(nsITransferable* aTransferable,
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nsIClipboardOwner* aOwner,
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int32_t aWhichClipboard) {
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NS_ENSURE_ARG(aTransferable);
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if (!nsIClipboard::IsClipboardTypeSupported(aWhichClipboard)) {
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return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
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}
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// Reject existing pending asyncSetData request if any.
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RejectPendingAsyncSetDataRequestIfAny(aWhichClipboard);
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return SetNativeClipboardData(aTransferable, aOwner, aWhichClipboard);
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}
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NS_IMETHODIMP ClipboardSetDataHelper::AsyncSetData(
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int32_t aWhichClipboard, nsIAsyncSetClipboardDataCallback* aCallback,
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nsIAsyncSetClipboardData** _retval) {
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*_retval = nullptr;
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if (!nsIClipboard::IsClipboardTypeSupported(aWhichClipboard)) {
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return NS_ERROR_DOM_NOT_SUPPORTED_ERR;
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}
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// Reject existing pending AsyncSetData request if any.
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RejectPendingAsyncSetDataRequestIfAny(aWhichClipboard);
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// Create a new AsyncSetClipboardData.
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RefPtr<AsyncSetClipboardData> request =
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mozilla::MakeRefPtr<AsyncSetClipboardData>(aWhichClipboard, this,
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aCallback);
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mPendingWriteRequests[aWhichClipboard] = request;
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request.forget(_retval);
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return NS_OK;
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}
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nsBaseClipboard::nsBaseClipboard(const ClipboardCapabilities& aClipboardCaps)
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: mClipboardCaps(aClipboardCaps) {
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using mozilla::MakeUnique;
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// Initialize clipboard cache.
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mCaches[kGlobalClipboard] = MakeUnique<ClipboardCache>();
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if (mClipboardCaps.supportsSelectionClipboard()) {
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mCaches[kSelectionClipboard] = MakeUnique<ClipboardCache>();
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}
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if (mClipboardCaps.supportsFindClipboard()) {
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mCaches[kFindClipboard] = MakeUnique<ClipboardCache>();
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}
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if (mClipboardCaps.supportsSelectionCache()) {
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mCaches[kSelectionCache] = MakeUnique<ClipboardCache>();
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}
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}
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NS_IMPL_ISUPPORTS_INHERITED0(nsBaseClipboard, ClipboardSetDataHelper)
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/**
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* Sets the transferable object
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*
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*/
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NS_IMETHODIMP nsBaseClipboard::SetData(nsITransferable* aTransferable,
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nsIClipboardOwner* anOwner,
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int32_t aWhichClipboard) {
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NS_ASSERTION(aTransferable, "clipboard given a null transferable");
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CLIPBOARD_LOG("%s: clipboard=%d", __FUNCTION__, aWhichClipboard);
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if (!nsIClipboard::IsClipboardTypeSupported(aWhichClipboard)) {
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CLIPBOARD_LOG("%s: clipboard %d is not supported.", __FUNCTION__,
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aWhichClipboard);
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return NS_ERROR_FAILURE;
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}
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const auto& clipboardCache = mCaches[aWhichClipboard];
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MOZ_ASSERT(clipboardCache);
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if (aTransferable == clipboardCache->GetTransferable() &&
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anOwner == clipboardCache->GetClipboardOwner()) {
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CLIPBOARD_LOG("%s: skipping update.", __FUNCTION__);
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return NS_OK;
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}
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clipboardCache->Clear();
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nsresult rv = NS_ERROR_FAILURE;
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if (aTransferable) {
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mIgnoreEmptyNotification = true;
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rv = ClipboardSetDataHelper::SetData(aTransferable, anOwner,
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aWhichClipboard);
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mIgnoreEmptyNotification = false;
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}
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if (NS_FAILED(rv)) {
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CLIPBOARD_LOG("%s: setting native clipboard data failed.", __FUNCTION__);
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return rv;
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}
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auto result = GetNativeClipboardSequenceNumber(aWhichClipboard);
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if (result.isErr()) {
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CLIPBOARD_LOG("%s: getting native clipboard change count failed.",
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__FUNCTION__);
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return result.unwrapErr();
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}
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clipboardCache->Update(aTransferable, anOwner, result.unwrap());
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return NS_OK;
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}
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/**
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* Gets the transferable object from system clipboard.
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*/
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NS_IMETHODIMP nsBaseClipboard::GetData(nsITransferable* aTransferable,
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int32_t aWhichClipboard) {
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CLIPBOARD_LOG("%s: clipboard=%d", __FUNCTION__, aWhichClipboard);
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if (!aTransferable) {
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NS_ASSERTION(false, "clipboard given a null transferable");
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return NS_ERROR_FAILURE;
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}
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if (mozilla::StaticPrefs::widget_clipboard_use_cached_data_enabled()) {
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// If we were the last ones to put something on the navtive clipboard, then
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// just use the cached transferable. Otherwise clear it because it isn't
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// relevant any more.
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if (auto* clipboardCache = GetClipboardCacheIfValid(aWhichClipboard)) {
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MOZ_ASSERT(clipboardCache->GetTransferable());
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// get flavor list that includes all acceptable flavors (including ones
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// obtained through conversion)
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nsTArray<nsCString> flavors;
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nsresult rv = aTransferable->FlavorsTransferableCanImport(flavors);
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if (NS_FAILED(rv)) {
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return NS_ERROR_FAILURE;
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}
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for (const auto& flavor : flavors) {
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nsCOMPtr<nsISupports> dataSupports;
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rv = clipboardCache->GetTransferable()->GetTransferData(
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flavor.get(), getter_AddRefs(dataSupports));
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if (NS_SUCCEEDED(rv)) {
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CLIPBOARD_LOG("%s: getting %s from cache.", __FUNCTION__,
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flavor.get());
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aTransferable->SetTransferData(flavor.get(), dataSupports);
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// maybe try to fill in more types? Is there a point?
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return NS_OK;
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}
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}
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}
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// at this point we can't satisfy the request from cache data so let's look
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// for things other people put on the system clipboard
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}
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return GetNativeClipboardData(aTransferable, aWhichClipboard);
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}
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RefPtr<GenericPromise> nsBaseClipboard::AsyncGetData(
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nsITransferable* aTransferable, int32_t aWhichClipboard) {
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nsresult rv = GetData(aTransferable, aWhichClipboard);
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if (NS_FAILED(rv)) {
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return GenericPromise::CreateAndReject(rv, __func__);
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}
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return GenericPromise::CreateAndResolve(true, __func__);
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}
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NS_IMETHODIMP nsBaseClipboard::EmptyClipboard(int32_t aWhichClipboard) {
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CLIPBOARD_LOG("%s: clipboard=%d", __FUNCTION__, aWhichClipboard);
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if (!nsIClipboard::IsClipboardTypeSupported(aWhichClipboard)) {
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CLIPBOARD_LOG("%s: clipboard %d is not supported.", __FUNCTION__,
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aWhichClipboard);
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return NS_ERROR_FAILURE;
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}
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EmptyNativeClipboardData(aWhichClipboard);
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const auto& clipboardCache = mCaches[aWhichClipboard];
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MOZ_ASSERT(clipboardCache);
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if (mIgnoreEmptyNotification) {
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MOZ_DIAGNOSTIC_ASSERT(!clipboardCache->GetTransferable() &&
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!clipboardCache->GetClipboardOwner() &&
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clipboardCache->GetSequenceNumber() == -1,
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"How did we have data in clipboard cache here?");
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return NS_OK;
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}
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clipboardCache->Clear();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsBaseClipboard::HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList,
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int32_t aWhichClipboard,
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bool* aOutResult) {
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CLIPBOARD_LOG("%s: clipboard=%d", __FUNCTION__, aWhichClipboard);
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if (CLIPBOARD_LOG_ENABLED()) {
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CLIPBOARD_LOG(" Asking for content clipboard=%i:\n", aWhichClipboard);
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for (const auto& flavor : aFlavorList) {
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CLIPBOARD_LOG(" MIME %s", flavor.get());
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}
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}
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*aOutResult = false;
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if (mozilla::StaticPrefs::widget_clipboard_use_cached_data_enabled()) {
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if (auto* clipboardCache = GetClipboardCacheIfValid(aWhichClipboard)) {
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MOZ_ASSERT(clipboardCache->GetTransferable());
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// first see if we have data for this in our cached transferable
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nsTArray<nsCString> transferableFlavors;
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nsresult rv =
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clipboardCache->GetTransferable()->FlavorsTransferableCanImport(
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transferableFlavors);
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if (NS_SUCCEEDED(rv)) {
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if (CLIPBOARD_LOG_ENABLED()) {
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CLIPBOARD_LOG(" Cached transferable types (nums %zu)\n",
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transferableFlavors.Length());
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for (const auto& transferableFlavor : transferableFlavors) {
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CLIPBOARD_LOG(" MIME %s", transferableFlavor.get());
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}
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}
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for (const auto& transferableFlavor : transferableFlavors) {
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for (const auto& flavor : aFlavorList) {
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if (transferableFlavor.Equals(flavor)) {
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CLIPBOARD_LOG(" has %s", flavor.get());
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*aOutResult = true;
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return NS_OK;
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}
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}
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}
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}
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}
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}
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auto resultOrError =
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HasNativeClipboardDataMatchingFlavors(aFlavorList, aWhichClipboard);
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if (resultOrError.isErr()) {
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CLIPBOARD_LOG("%s: checking native clipboard data matching flavors falied.",
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__FUNCTION__);
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return resultOrError.unwrapErr();
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}
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*aOutResult = resultOrError.unwrap();
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return NS_OK;
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}
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RefPtr<DataFlavorsPromise> nsBaseClipboard::AsyncHasDataMatchingFlavors(
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const nsTArray<nsCString>& aFlavorList, int32_t aWhichClipboard) {
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nsTArray<nsCString> results;
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for (const auto& flavor : aFlavorList) {
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bool hasMatchingFlavor = false;
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nsresult rv = HasDataMatchingFlavors(AutoTArray<nsCString, 1>{flavor},
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aWhichClipboard, &hasMatchingFlavor);
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if (NS_SUCCEEDED(rv) && hasMatchingFlavor) {
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results.AppendElement(flavor);
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}
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}
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return DataFlavorsPromise::CreateAndResolve(std::move(results), __func__);
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}
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NS_IMETHODIMP
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nsBaseClipboard::IsClipboardTypeSupported(int32_t aWhichClipboard,
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bool* aRetval) {
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NS_ENSURE_ARG_POINTER(aRetval);
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switch (aWhichClipboard) {
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case kGlobalClipboard:
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// We always support the global clipboard.
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*aRetval = true;
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return NS_OK;
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case kSelectionClipboard:
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*aRetval = mClipboardCaps.supportsSelectionClipboard();
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return NS_OK;
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case kFindClipboard:
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*aRetval = mClipboardCaps.supportsFindClipboard();
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return NS_OK;
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case kSelectionCache:
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*aRetval = mClipboardCaps.supportsSelectionCache();
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return NS_OK;
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default:
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*aRetval = false;
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return NS_OK;
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}
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}
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nsBaseClipboard::ClipboardCache* nsBaseClipboard::GetClipboardCacheIfValid(
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int32_t aClipboardType) {
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MOZ_ASSERT(nsIClipboard::IsClipboardTypeSupported(aClipboardType));
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const mozilla::UniquePtr<ClipboardCache>& cache = mCaches[aClipboardType];
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MOZ_ASSERT(cache);
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if (!cache->GetTransferable()) {
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MOZ_ASSERT(cache->GetSequenceNumber() == -1);
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return nullptr;
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}
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auto changeCountOrError = GetNativeClipboardSequenceNumber(aClipboardType);
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if (changeCountOrError.isErr()) {
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return nullptr;
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}
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if (changeCountOrError.unwrap() != cache->GetSequenceNumber()) {
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// Clipboard cache is invalid, clear it.
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cache->Clear();
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return nullptr;
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}
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return cache.get();
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}
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void nsBaseClipboard::ClipboardCache::Clear() {
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if (mClipboardOwner) {
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mClipboardOwner->LosingOwnership(mTransferable);
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mClipboardOwner = nullptr;
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}
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mTransferable = nullptr;
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mSequenceNumber = -1;
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}
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