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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 "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, mData,
mPendingGetTypeRequests)
ClipboardItem::ItemEntry::ItemEntry(const nsAString& aType,
const nsACString& aFormat)
: mType(aType), mFormat(aFormat) {
// XXX https://bugzilla.mozilla.org/show_bug.cgi?id=1776879.
// In most of cases, the mType and mFormat are the same, execpt for plain
// text. We expose it as "text/plain" to the web, but we use "text/unicode"
// internally to retrieve from system clipboard.
MOZ_ASSERT_IF(
!mType.Equals(NS_ConvertUTF8toUTF16(mFormat)),
mType.EqualsLiteral(kTextMime) && mFormat.EqualsLiteral(kUnicodeMime));
}
void ClipboardItem::ItemEntry::SetData(already_AddRefed<Blob>&& aBlob) {
// 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(
!mLoadingPromise.Exists(),
"Should not be in the process of loading data from clipboard.");
mData.SetAsBlob() = std::move(aBlob);
}
void ClipboardItem::ItemEntry::LoadData(nsIGlobalObject& aGlobal,
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(
!mLoadingPromise.Exists(),
"Should not be in the process of loading data from clipboard.");
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1", &rv));
if (NS_FAILED(rv)) {
return;
}
nsCOMPtr<nsITransferable> trans(&aTransferable);
clipboard->AsyncGetData(trans, nsIClipboard::kGlobalClipboard)
->Then(
GetMainThreadSerialEventTarget(), __func__,
/* resolved */
[self = RefPtr{this}, global = RefPtr{&aGlobal}, trans]() {
self->mLoadingPromise.Complete();
nsCOMPtr<nsISupports> data;
nsresult rv = trans->GetTransferData(self->Format().get(),
getter_AddRefs(data));
if (NS_WARN_IF(NS_FAILED(rv))) {
self->RejectPendingGetTypePromises(rv);
return;
}
RefPtr<Blob> blob;
if (nsCOMPtr<nsISupportsString> supportsstr =
do_QueryInterface(data)) {
nsAutoString str;
supportsstr->GetData(str);
blob = Blob::CreateStringBlob(global, 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->RejectPendingGetTypePromises(rv);
return;
}
blob =
Blob::CreateMemoryBlob(global, data, available, self->Type());
} else if (nsCOMPtr<nsISupportsCString> supportscstr =
do_QueryInterface(data)) {
nsAutoCString str;
supportscstr->GetData(str);
blob = Blob::CreateStringBlob(global, str, self->Type());
}
if (!blob) {
self->RejectPendingGetTypePromises(NS_ERROR_DOM_DATA_ERR);
return;
}
self->ResolvePendingGetTypePromises(*blob);
self->SetData(blob.forget());
},
/* rejected */
[self = RefPtr{this}](nsresult rv) {
self->mLoadingPromise.Complete();
self->RejectPendingGetTypePromises(rv);
})
->Track(mLoadingPromise);
}
void ClipboardItem::ItemEntry::ReactPromise(nsIGlobalObject& aGlobal,
Promise& aPromise) {
// Still loading data from system clipboard.
if (mLoadingPromise.Exists()) {
mPendingGetTypeRequests.AppendElement(&aPromise);
return;
}
if (mData.IsBlob()) {
aPromise.MaybeResolve(mData);
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 (mData.IsString()) {
if (RefPtr<Blob> blob = Blob::CreateStringBlob(
&aGlobal, NS_ConvertUTF16toUTF8(mData.GetAsString()), mType)) {
aPromise.MaybeResolve(blob);
return;
}
}
aPromise.MaybeRejectWithDataError("The data for type '"_ns +
NS_ConvertUTF16toUTF8(mType) +
"' was not found"_ns);
}
void ClipboardItem::ItemEntry::RejectPendingGetTypePromises(nsresult rv) {
MOZ_ASSERT(!mLoadingPromise.Exists(),
"Should not be in the process of loading data from clipboard.");
nsTArray<RefPtr<Promise>> promises = std::move(mPendingGetTypeRequests);
for (auto& promise : promises) {
promise->MaybeReject(rv);
}
}
void ClipboardItem::ItemEntry::ResolvePendingGetTypePromises(Blob& aBlob) {
MOZ_ASSERT(!mLoadingPromise.Exists(),
"Should not be in the process of loading data from clipboard.");
nsTArray<RefPtr<Promise>> promises = std::move(mPendingGetTypeRequests);
for (auto& promise : promises) {
promise->MaybeResolve(&aBlob);
}
}
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, OwningStringOrBlob>& aItems,
const ClipboardItemOptions& aOptions, ErrorResult& aRv) {
if (aItems.Entries().IsEmpty()) {
aRv.ThrowTypeError("At least one entry required");
return nullptr;
}
nsTArray<RefPtr<ItemEntry>> items;
for (const auto& entry : aItems.Entries()) {
nsAutoCString format = entry.mKey.EqualsLiteral(kTextMime)
? nsAutoCString(kUnicodeMime)
: NS_ConvertUTF16toUTF8(entry.mKey);
items.AppendElement(
MakeRefPtr<ItemEntry>(entry.mKey, format, entry.mValue));
}
RefPtr<ClipboardItem> item = MakeRefPtr<ClipboardItem>(
aGlobal.GetAsSupports(), 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->ReactPromise(*global, *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
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