void
DataTransfer::CacheExternalDragFormats()
{
// Called during the constructor to cache the formats available from an
// external drag. The data associated with each format will be set to null.
// This data will instead only be retrieved in FillInExternalDragData when
// asked for, as it may be time consuming for the source application to
// generate it.
nsCOMPtr<nsIDragSession> dragSession = nsContentUtils::GetDragSession();
if (!dragSession) {
return;
}
// make sure that the system principal is used for external drags
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
nsCOMPtr<nsIPrincipal> sysPrincipal;
ssm->GetSystemPrincipal(getter_AddRefs(sysPrincipal));
// there isn't a way to get a list of the formats that might be available on
// all platforms, so just check for the types that can actually be imported
// XXXndeakin there are some other formats but those are platform specific.
// NOTE: kFileMime must have index 0
const char* formats[] = { kFileMime, kHTMLMime, kURLMime, kURLDataMime,
kUnicodeMime, kPNGImageMime };
uint32_t count;
dragSession->GetNumDropItems(&count);
for (uint32_t c = 0; c < count; c++) {
bool hasFileData = false;
dragSession->IsDataFlavorSupported(kFileMime, &hasFileData);
// First, check for the special format that holds custom types.
bool supported;
dragSession->IsDataFlavorSupported(kCustomTypesMime, &supported);
if (supported) {
FillInExternalCustomTypes(c, sysPrincipal);
}
for (uint32_t f = 0; f < ArrayLength(formats); f++) {
// IsDataFlavorSupported doesn't take an index as an argument and just
// checks if any of the items support a particular flavor, even though
// the GetData method does take an index. Here, we just assume that
// every item being dragged has the same set of flavors.
bool supported;
dragSession->IsDataFlavorSupported(formats[f], &supported);
// if the format is supported, add an item to the array with null as
// the data. When retrieved, GetRealData will read the data.
if (supported) {
CacheExternalData(formats[f], c, sysPrincipal, /* hidden = */ f && hasFileData);
}
}
}
}
void
DataTransfer::SetDataWithPrincipalFromOtherProcess(const nsAString& aFormat,
nsIVariant* aData,
uint32_t aIndex,
nsIPrincipal* aPrincipal)
{
if (aFormat.EqualsLiteral(kCustomTypesMime)) {
FillInExternalCustomTypes(aData, aIndex, aPrincipal);
} else {
SetDataWithPrincipal(aFormat, aData, aIndex, aPrincipal);
}
}
void
DataTransfer::FillInExternalCustomTypes(uint32_t aIndex, nsIPrincipal* aPrincipal)
{
TransferItem item;
item.mFormat.AssignLiteral(kCustomTypesMime);
FillInExternalData(item, aIndex);
if (!item.mData) {
return;
}
FillInExternalCustomTypes(item.mData, aIndex, aPrincipal);
}
void
DataTransfer::CacheExternalClipboardFormats(bool aPlainTextOnly)
{
// Called during the constructor for paste events to cache the formats
// available on the clipboard. As with CacheExternalDragFormats, the
// data will only be retrieved when needed.
NS_ASSERTION(mEventMessage == ePaste,
"caching clipboard data for invalid event");
nsCOMPtr<nsIPrincipal> sysPrincipal = nsContentUtils::GetSystemPrincipal();
nsTArray<nsCString> typesArray;
if (XRE_IsContentProcess()) {
ContentChild::GetSingleton()->SendGetExternalClipboardFormats(mClipboardType, aPlainTextOnly, &typesArray);
} else {
GetExternalClipboardFormats(mClipboardType, aPlainTextOnly, &typesArray);
}
if (aPlainTextOnly) {
// The only thing that will be in types is kUnicodeMime
MOZ_ASSERT(typesArray.IsEmpty() || typesArray.Length() == 1);
if (typesArray.Length() == 1) {
CacheExternalData(kUnicodeMime, 0, sysPrincipal, false);
}
return;
}
bool hasFileData = false;
for (const nsCString& type: typesArray) {
if (type.EqualsLiteral(kCustomTypesMime)) {
FillInExternalCustomTypes(0, sysPrincipal);
} else if (type.EqualsLiteral(kFileMime) && XRE_IsContentProcess()) {
// We will be ignoring any application/x-moz-file files found in the paste
// datatransfer within e10s, as they will fail top be sent over IPC. Because of
// that, we will unset hasFileData, whether or not it would have been set.
// (bug 1308007)
hasFileData = false;
continue;
} else {
// We expect that if kFileMime is supported, then it will be the either at
// index 0 or at index 1 in the typesArray returned by GetExternalClipboardFormats
if (type.EqualsLiteral(kFileMime) && !XRE_IsContentProcess()) {
hasFileData = true;
}
// If we aren't the file data, and we have file data, we want to be hidden
CacheExternalData(type.get(), 0, sysPrincipal, /* hidden = */ !type.EqualsLiteral(kFileMime) && hasFileData);
}
}
}
void
DataTransfer::CacheExternalClipboardFormats()
{
NS_ASSERTION(mEventMessage == ePaste,
"caching clipboard data for invalid event");
// Called during the constructor for paste events to cache the formats
// available on the clipboard. As with CacheExternalDragFormats, the
// data will only be retrieved when needed.
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1");
if (!clipboard || mClipboardType < 0) {
return;
}
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
nsCOMPtr<nsIPrincipal> sysPrincipal;
ssm->GetSystemPrincipal(getter_AddRefs(sysPrincipal));
// Check if the clipboard has any files
bool hasFileData = false;
const char *fileMime[] = { kFileMime };
clipboard->HasDataMatchingFlavors(fileMime, 1, mClipboardType, &hasFileData);
// there isn't a way to get a list of the formats that might be available on
// all platforms, so just check for the types that can actually be imported.
// Note that the loop below assumes that kCustomTypesMime will be first.
const char* formats[] = { kCustomTypesMime, kFileMime, kHTMLMime, kRTFMime,
kURLMime, kURLDataMime, kUnicodeMime, kPNGImageMime,
kJPEGImageMime, kGIFImageMime };
for (uint32_t f = 0; f < mozilla::ArrayLength(formats); ++f) {
// check each format one at a time
bool supported;
clipboard->HasDataMatchingFlavors(&(formats[f]), 1, mClipboardType,
&supported);
// if the format is supported, add an item to the array with null as
// the data. When retrieved, GetRealData will read the data.
if (supported) {
if (f == 0) {
FillInExternalCustomTypes(0, sysPrincipal);
} else {
// If we aren't the file data, and we have file data, we want to be hidden
CacheExternalData(formats[f], 0, sysPrincipal, /* hidden = */ f != 1 && hasFileData);
}
}
}
}
void
DataTransfer::FillInExternalCustomTypes(uint32_t aIndex,
nsIPrincipal* aPrincipal)
{
RefPtr<DataTransferItem> item = new DataTransferItem(this,
NS_LITERAL_STRING(kCustomTypesMime),
DataTransferItem::KIND_STRING);
item->SetIndex(aIndex);
nsCOMPtr<nsIVariant> variant = item->DataNoSecurityCheck();
if (!variant) {
return;
}
FillInExternalCustomTypes(variant, aIndex, aPrincipal);
}
void
DataTransfer::SetDataWithPrincipalFromOtherProcess(const nsAString& aFormat,
nsIVariant* aData,
uint32_t aIndex,
nsIPrincipal* aPrincipal,
bool aHidden)
{
if (aFormat.EqualsLiteral(kCustomTypesMime)) {
FillInExternalCustomTypes(aData, aIndex, aPrincipal);
} else {
nsAutoString format;
GetRealFormat(aFormat, format);
ErrorResult rv;
RefPtr<DataTransferItem> item =
mItems->SetDataWithPrincipal(format, aData, aIndex, aPrincipal,
/* aInsertOnly = */ false, aHidden, rv);
if (NS_WARN_IF(rv.Failed())) {
rv.SuppressException();
}
}
}
void
DataTransfer::CacheExternalClipboardFormats()
{
NS_ASSERTION(mEventMessage == ePaste,
"caching clipboard data for invalid event");
// Called during the constructor for paste events to cache the formats
// available on the clipboard. As with CacheExternalDragFormats, the
// data will only be retrieved when needed.
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1");
if (!clipboard || mClipboardType < 0) {
return;
}
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
nsCOMPtr<nsIPrincipal> sysPrincipal;
ssm->GetSystemPrincipal(getter_AddRefs(sysPrincipal));
// Check if the clipboard has any files
bool hasFileData = false;
const char *fileMime[] = { kFileMime };
clipboard->HasDataMatchingFlavors(fileMime, 1, mClipboardType, &hasFileData);
// We will be ignoring any application/x-moz-file files found in the paste
// datatransfer within e10s, as they will fail to be sent over IPC. Because of
// that, we will unset hasFileData, whether or not it would have been set.
// (bug 1308007)
if (XRE_IsContentProcess()) {
hasFileData = false;
}
// there isn't a way to get a list of the formats that might be available on
// all platforms, so just check for the types that can actually be imported.
// NOTE: kCustomTypesMime must have index 0, kFileMime index 1
const char* formats[] = { kCustomTypesMime, kFileMime, kHTMLMime, kRTFMime,
kURLMime, kURLDataMime, kUnicodeMime, kPNGImageMime };
for (uint32_t f = 0; f < mozilla::ArrayLength(formats); ++f) {
// check each format one at a time
bool supported;
clipboard->HasDataMatchingFlavors(&(formats[f]), 1, mClipboardType,
&supported);
// if the format is supported, add an item to the array with null as
// the data. When retrieved, GetRealData will read the data.
if (supported) {
if (f == 0) {
FillInExternalCustomTypes(0, sysPrincipal);
} else {
// In non-e10s we support pasting files from explorer.exe.
// Unfortunately, we fail to send that data over IPC in e10s, so we
// don't want to add the item to the DataTransfer and end up producing a
// null `application/x-moz-file`. (bug 1308007)
if (XRE_IsContentProcess() && f == 1) {
continue;
}
// If we aren't the file data, and we have file data, we want to be hidden
CacheExternalData(formats[f], 0, sysPrincipal, /* hidden = */ f != 1 && hasFileData);
}
}
}
}
