void
nsBaseDragService::DiscardInternalTransferData()
{
if (mDataTransfer && mSourceNode) {
MOZ_ASSERT(!!DataTransfer::Cast(mDataTransfer));
DataTransferItemList* items = DataTransfer::Cast(mDataTransfer)->Items();
for (size_t i = 0; i < items->Length(); i++) {
bool found;
DataTransferItem* item = items->IndexedGetter(i, found);
// Non-OTHER items may still be needed by JS. Skip them.
if (!found || item->Kind() != DataTransferItem::KIND_OTHER) {
continue;
}
nsCOMPtr<nsIVariant> variant = item->DataNoSecurityCheck();
nsCOMPtr<nsIWritableVariant> writable = do_QueryInterface(variant);
if (writable) {
writable->SetAsEmpty();
}
}
}
}
// static
PassRefPtrWillBeRawPtr<Entry> DataTransferItemFileSystem::webkitGetAsEntry(ExecutionContext* executionContext, DataTransferItem& item)
{
if (!item.dataObjectItem()->isFilename())
return nullptr;
// For dragged files getAsFile must be pretty lightweight.
Blob* file = item.getAsFile().get();
// The clipboard may not be in a readable state.
if (!file)
return nullptr;
ASSERT(file->isFile());
DraggedIsolatedFileSystem* filesystem = DraggedIsolatedFileSystem::from(item.clipboard()->dataObject().get());
DOMFileSystem* domFileSystem = filesystem ? filesystem->getDOMFileSystem(executionContext) : 0;
if (!filesystem) {
// IsolatedFileSystem may not be enabled.
return nullptr;
}
ASSERT(domFileSystem);
// The dropped entries are mapped as top-level entries in the isolated filesystem.
String virtualPath = DOMFilePath::append("/", toFile(file)->name());
// FIXME: This involves synchronous file operation. Consider passing file type data when we dispatch drag event.
FileMetadata metadata;
if (!getFileMetadata(toFile(file)->path(), metadata))
return nullptr;
if (metadata.type == FileMetadata::TypeDirectory)
return DirectoryEntry::create(domFileSystem, virtualPath);
return FileEntry::create(domFileSystem, virtualPath);
}
already_AddRefed<DOMStringList>
DataTransfer::GetTypes(ErrorResult& aRv) const
{
RefPtr<DOMStringList> types = new DOMStringList();
const nsTArray<RefPtr<DataTransferItem>>* items = mItems->MozItemsAt(0);
if (NS_WARN_IF(!items)) {
return types.forget();
}
for (uint32_t i = 0; i < items->Length(); i++) {
DataTransferItem* item = items->ElementAt(i);
MOZ_ASSERT(item);
if (item->ChromeOnly() && !nsContentUtils::LegacyIsCallerChromeOrNativeCode()) {
continue;
}
nsAutoString type;
item->GetType(type);
if (item->Kind() == DataTransferItem::KIND_STRING || type.EqualsASCII(kFileMime)) {
// If the entry has kind KIND_STRING, we want to add it to the list.
if (NS_WARN_IF(!types->Add(type))) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
}
for (uint32_t i = 0; i < mItems->Length(); ++i) {
ErrorResult rv;
bool found = false;
DataTransferItem* item = mItems->IndexedGetter(i, found, rv);
if (!found || rv.Failed() || item->Kind() != DataTransferItem::KIND_FILE) {
rv.SuppressException();
continue;
}
if (NS_WARN_IF(!types->Add(NS_LITERAL_STRING("Files")))) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
break;
}
return types.forget();
}
void
DataTransfer::GetTypes(nsTArray<nsString>& aTypes,
nsIPrincipal& aSubjectPrincipal) const
{
// When called from bindings, aTypes will be empty, but since we might have
// Gecko-internal callers too, clear it to be safe.
aTypes.Clear();
const nsTArray<RefPtr<DataTransferItem>>* items = mItems->MozItemsAt(0);
if (NS_WARN_IF(!items)) {
return;
}
for (uint32_t i = 0; i < items->Length(); i++) {
DataTransferItem* item = items->ElementAt(i);
MOZ_ASSERT(item);
if (item->ChromeOnly() && !nsContentUtils::IsSystemPrincipal(&aSubjectPrincipal)) {
continue;
}
// NOTE: The reason why we get the internal type here is because we want
// kFileMime to appear in the types list for backwards compatibility
// reasons.
nsAutoString type;
item->GetInternalType(type);
if (item->Kind() == DataTransferItem::KIND_STRING || type.EqualsASCII(kFileMime)) {
// If the entry has kind KIND_STRING, we want to add it to the list.
aTypes.AppendElement(type);
}
}
for (uint32_t i = 0; i < mItems->Length(); ++i) {
bool found = false;
DataTransferItem* item = mItems->IndexedGetter(i, found);
MOZ_ASSERT(found);
if (item->Kind() != DataTransferItem::KIND_FILE) {
continue;
}
aTypes.AppendElement(NS_LITERAL_STRING("Files"));
break;
}
}