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-rw-r--r--dom/events/ClipboardItem.cpp331
1 files changed, 331 insertions, 0 deletions
diff --git a/dom/events/ClipboardItem.cpp b/dom/events/ClipboardItem.cpp
new file mode 100644
index 0000000000..3226f40824
--- /dev/null
+++ b/dom/events/ClipboardItem.cpp
@@ -0,0 +1,331 @@
+/* -*- 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 "mozilla/dom/ClipboardItem.h"
+
+#include "mozilla/dom/Promise.h"
+#include "mozilla/dom/Record.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIClipboard.h"
+#include "nsIInputStream.h"
+#include "nsISupportsPrimitives.h"
+#include "nsNetUtil.h"
+#include "nsServiceManagerUtils.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION(ClipboardItem::ItemEntry, mGlobal, mData,
+ mPendingGetTypeRequests)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ClipboardItem::ItemEntry)
+ NS_INTERFACE_MAP_ENTRY(nsISupports)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(ClipboardItem::ItemEntry)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(ClipboardItem::ItemEntry)
+
+void ClipboardItem::ItemEntry::ResolvedCallback(JSContext* aCx,
+ JS::Handle<JS::Value> aValue,
+ ErrorResult& aRv) {
+ MOZ_ASSERT(!mLoadingPromise.Exists());
+ mIsLoadingData = false;
+ OwningStringOrBlob clipboardData;
+ if (!clipboardData.Init(aCx, aValue)) {
+ JS_ClearPendingException(aCx);
+ RejectPendingPromises(NS_ERROR_DOM_DATA_ERR);
+ return;
+ }
+
+ MaybeResolvePendingPromises(std::move(clipboardData));
+}
+
+void ClipboardItem::ItemEntry::RejectedCallback(JSContext* aCx,
+ JS::Handle<JS::Value> aValue,
+ ErrorResult& aRv) {
+ MOZ_ASSERT(!mLoadingPromise.Exists());
+ mIsLoadingData = false;
+ RejectPendingPromises(NS_ERROR_DOM_DATA_ERR);
+}
+
+RefPtr<ClipboardItem::ItemEntry::GetDataPromise>
+ClipboardItem::ItemEntry::GetData() {
+ // Data is still being loaded, either from the system clipboard or the data
+ // promise provided to the ClipboardItem constructor.
+ if (mIsLoadingData) {
+ MOZ_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ MOZ_ASSERT(mLoadResult.isNothing(), "Should have no load result");
+
+ MozPromiseHolder<GetDataPromise> holder;
+ RefPtr<GetDataPromise> promise = holder.Ensure(__func__);
+ mPendingGetDataRequests.AppendElement(std::move(holder));
+ return promise.forget();
+ }
+
+ if (NS_FAILED(mLoadResult.value())) {
+ MOZ_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ // We are not able to load data, so reject the promise directly.
+ return GetDataPromise::CreateAndReject(mLoadResult.value(), __func__);
+ }
+
+ MOZ_ASSERT(mData.IsString() || mData.IsBlob(), "Data should be initialized");
+ OwningStringOrBlob data(mData);
+ return GetDataPromise::CreateAndResolve(std::move(data), __func__);
+}
+
+void ClipboardItem::ItemEntry::LoadDataFromSystemClipboard(
+ nsITransferable& aTransferable) {
+ // XXX maybe we could consider adding a method to check whether the union
+ // object is uninitialized or initialized.
+ MOZ_DIAGNOSTIC_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized.");
+ MOZ_DIAGNOSTIC_ASSERT(mLoadResult.isNothing(), "Should have no load result");
+ MOZ_DIAGNOSTIC_ASSERT(!mIsLoadingData && !mLoadingPromise.Exists(),
+ "Should not be in the process of loading data");
+
+ nsresult rv;
+ nsCOMPtr<nsIClipboard> clipboard(
+ do_GetService("@mozilla.org/widget/clipboard;1", &rv));
+ if (NS_FAILED(rv)) {
+ return;
+ }
+
+ mIsLoadingData = true;
+ nsCOMPtr<nsITransferable> trans(&aTransferable);
+ clipboard->AsyncGetData(trans, nsIClipboard::kGlobalClipboard)
+ ->Then(
+ GetMainThreadSerialEventTarget(), __func__,
+ /* resolved */
+ [self = RefPtr{this}, trans]() {
+ self->mIsLoadingData = false;
+ self->mLoadingPromise.Complete();
+
+ nsCOMPtr<nsISupports> data;
+ nsresult rv = trans->GetTransferData(
+ NS_ConvertUTF16toUTF8(self->Type()).get(),
+ getter_AddRefs(data));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ self->RejectPendingPromises(rv);
+ return;
+ }
+
+ RefPtr<Blob> blob;
+ if (nsCOMPtr<nsISupportsString> supportsstr =
+ do_QueryInterface(data)) {
+ nsAutoString str;
+ supportsstr->GetData(str);
+
+ blob = Blob::CreateStringBlob(
+ self->mGlobal, NS_ConvertUTF16toUTF8(str), self->Type());
+ } else if (nsCOMPtr<nsIInputStream> istream =
+ do_QueryInterface(data)) {
+ uint64_t available;
+ void* data = nullptr;
+ nsresult rv =
+ NS_ReadInputStreamToBuffer(istream, &data, -1, &available);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ self->RejectPendingPromises(rv);
+ return;
+ }
+
+ blob = Blob::CreateMemoryBlob(self->mGlobal, data, available,
+ self->Type());
+ } else if (nsCOMPtr<nsISupportsCString> supportscstr =
+ do_QueryInterface(data)) {
+ nsAutoCString str;
+ supportscstr->GetData(str);
+
+ blob = Blob::CreateStringBlob(self->mGlobal, str, self->Type());
+ }
+
+ if (!blob) {
+ self->RejectPendingPromises(NS_ERROR_DOM_DATA_ERR);
+ return;
+ }
+
+ OwningStringOrBlob clipboardData;
+ clipboardData.SetAsBlob() = std::move(blob);
+ self->MaybeResolvePendingPromises(std::move(clipboardData));
+ },
+ /* rejected */
+ [self = RefPtr{this}](nsresult rv) {
+ self->mIsLoadingData = false;
+ self->mLoadingPromise.Complete();
+ self->RejectPendingPromises(rv);
+ })
+ ->Track(mLoadingPromise);
+}
+
+void ClipboardItem::ItemEntry::LoadDataFromDataPromise(Promise& aDataPromise) {
+ MOZ_DIAGNOSTIC_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ MOZ_DIAGNOSTIC_ASSERT(mLoadResult.isNothing(), "Should have no load result");
+ MOZ_DIAGNOSTIC_ASSERT(!mIsLoadingData && !mLoadingPromise.Exists(),
+ "Should not be in the process of loading data");
+
+ mIsLoadingData = true;
+ aDataPromise.AppendNativeHandler(this);
+}
+
+void ClipboardItem::ItemEntry::ReactGetTypePromise(Promise& aPromise) {
+ // Data is still being loaded, either from the system clipboard or the data
+ // promise provided to the ClipboardItem constructor.
+ if (mIsLoadingData) {
+ MOZ_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ MOZ_ASSERT(mLoadResult.isNothing(), "Should have no load result.");
+ mPendingGetTypeRequests.AppendElement(&aPromise);
+ return;
+ }
+
+ if (NS_FAILED(mLoadResult.value())) {
+ MOZ_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ aPromise.MaybeRejectWithDataError("The data for type '"_ns +
+ NS_ConvertUTF16toUTF8(mType) +
+ "' was not found"_ns);
+ return;
+ }
+
+ MaybeResolveGetTypePromise(mData, aPromise);
+}
+
+void ClipboardItem::ItemEntry::MaybeResolveGetTypePromise(
+ const OwningStringOrBlob& aData, Promise& aPromise) {
+ if (aData.IsBlob()) {
+ aPromise.MaybeResolve(aData);
+ return;
+ }
+
+ // XXX This is for the case that data is from ClipboardItem constructor,
+ // maybe we should also load that into a Blob earlier. But Safari returns
+ // different `Blob` instances for each `getTypes` call if the string is from
+ // ClipboardItem constructor, which is more like our current setup.
+ if (RefPtr<Blob> blob = Blob::CreateStringBlob(
+ mGlobal, NS_ConvertUTF16toUTF8(aData.GetAsString()), mType)) {
+ aPromise.MaybeResolve(blob);
+ return;
+ }
+
+ aPromise.MaybeRejectWithDataError("The data for type '"_ns +
+ NS_ConvertUTF16toUTF8(mType) +
+ "' was not found"_ns);
+}
+
+void ClipboardItem::ItemEntry::RejectPendingPromises(nsresult aRv) {
+ MOZ_ASSERT(NS_FAILED(aRv), "Should have a failure code here");
+ MOZ_DIAGNOSTIC_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ MOZ_DIAGNOSTIC_ASSERT(mLoadResult.isNothing(), "Should not have load result");
+ MOZ_DIAGNOSTIC_ASSERT(!mIsLoadingData && !mLoadingPromise.Exists(),
+ "Should not be in the process of loading data");
+ mLoadResult.emplace(aRv);
+ auto promiseHolders = std::move(mPendingGetDataRequests);
+ for (auto& promiseHolder : promiseHolders) {
+ promiseHolder.Reject(aRv, __func__);
+ }
+ auto getTypePromises = std::move(mPendingGetTypeRequests);
+ for (auto& promise : getTypePromises) {
+ promise->MaybeReject(aRv);
+ }
+}
+
+void ClipboardItem::ItemEntry::MaybeResolvePendingPromises(
+ OwningStringOrBlob&& aData) {
+ MOZ_DIAGNOSTIC_ASSERT(!mData.IsString() && !mData.IsBlob(),
+ "Data should be uninitialized");
+ MOZ_DIAGNOSTIC_ASSERT(mLoadResult.isNothing(), "Should not have load result");
+ MOZ_DIAGNOSTIC_ASSERT(!mIsLoadingData && !mLoadingPromise.Exists(),
+ "Should not be in the process of loading data");
+ mLoadResult.emplace(NS_OK);
+ mData = std::move(aData);
+ auto getDataPromiseHolders = std::move(mPendingGetDataRequests);
+ for (auto& promiseHolder : getDataPromiseHolders) {
+ OwningStringOrBlob data(mData);
+ promiseHolder.Resolve(std::move(data), __func__);
+ }
+ auto promises = std::move(mPendingGetTypeRequests);
+ for (auto& promise : promises) {
+ MaybeResolveGetTypePromise(mData, *promise);
+ }
+}
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(ClipboardItem, mOwner, mItems)
+
+ClipboardItem::ClipboardItem(nsISupports* aOwner,
+ const dom::PresentationStyle aPresentationStyle,
+ nsTArray<RefPtr<ItemEntry>>&& aItems)
+ : mOwner(aOwner),
+ mPresentationStyle(aPresentationStyle),
+ mItems(std::move(aItems)) {}
+
+// static
+already_AddRefed<ClipboardItem> ClipboardItem::Constructor(
+ const GlobalObject& aGlobal,
+ const Record<nsString, OwningNonNull<Promise>>& aItems,
+ const ClipboardItemOptions& aOptions, ErrorResult& aRv) {
+ if (aItems.Entries().IsEmpty()) {
+ aRv.ThrowTypeError("At least one entry required");
+ return nullptr;
+ }
+
+ nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
+ MOZ_ASSERT(global);
+
+ nsTArray<RefPtr<ItemEntry>> items;
+ for (const auto& entry : aItems.Entries()) {
+ RefPtr<ItemEntry> item = MakeRefPtr<ItemEntry>(global, entry.mKey);
+ item->LoadDataFromDataPromise(*entry.mValue);
+ items.AppendElement(std::move(item));
+ }
+
+ RefPtr<ClipboardItem> item = MakeRefPtr<ClipboardItem>(
+ global, aOptions.mPresentationStyle, std::move(items));
+ return item.forget();
+}
+
+void ClipboardItem::GetTypes(nsTArray<nsString>& aTypes) const {
+ for (const auto& item : mItems) {
+ aTypes.AppendElement(item->Type());
+ }
+}
+
+already_AddRefed<Promise> ClipboardItem::GetType(const nsAString& aType,
+ ErrorResult& aRv) {
+ nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetParentObject());
+ RefPtr<Promise> p = Promise::Create(global, aRv);
+ if (aRv.Failed()) {
+ return nullptr;
+ }
+
+ for (auto& item : mItems) {
+ MOZ_ASSERT(item);
+
+ const nsAString& type = item->Type();
+ if (type == aType) {
+ nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetParentObject());
+ if (NS_WARN_IF(!global)) {
+ p->MaybeReject(NS_ERROR_UNEXPECTED);
+ return p.forget();
+ }
+
+ item->ReactGetTypePromise(*p);
+ return p.forget();
+ }
+ }
+
+ p->MaybeRejectWithNotFoundError(
+ "The type '"_ns + NS_ConvertUTF16toUTF8(aType) + "' was not found"_ns);
+ return p.forget();
+}
+
+JSObject* ClipboardItem::WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) {
+ return mozilla::dom::ClipboardItem_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+} // namespace mozilla::dom