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nsClipboard.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:expandtab:shiftwidth=2:tabstop=2:
*/
/* 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/ArrayUtils.h"
#include "nsArrayUtils.h"
#include "nsClipboard.h"
#if defined(MOZ_X11)
# include "nsClipboardX11.h"
#endif
#if defined(MOZ_WAYLAND)
# include "nsClipboardWayland.h"
#endif
#include "nsGtkUtils.h"
#include "nsIURI.h"
#include "nsIFile.h"
#include "nsNetUtil.h"
#include "nsContentUtils.h"
#include "HeadlessClipboard.h"
#include "nsSupportsPrimitives.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "nsPrimitiveHelpers.h"
#include "nsImageToPixbuf.h"
#include "nsStringStream.h"
#include "nsIFileURL.h"
#include "nsIObserverService.h"
#include "mozilla/Services.h"
#include "mozilla/RefPtr.h"
#include "mozilla/GRefPtr.h"
#include "mozilla/SchedulerGroup.h"
#include "mozilla/StaticPrefs_widget.h"
#include "mozilla/TimeStamp.h"
#include "GRefPtr.h"
#include "WidgetUtilsGtk.h"
#include "imgIContainer.h"
#include <gtk/gtk.h>
#if defined(MOZ_X11)
# include <gtk/gtkx.h>
#endif
#include "mozilla/Encoding.h"
using namespace mozilla;
// Idle timeout for receiving selection and property notify events (microsec)
// Right now it's set to 1 sec.
const int kClipboardTimeout = 1000000;
// Defines how many event loop iterations will be done without sleep.
// We ususally get data in first 2-3 iterations unless some large object
// (an image for instance) is transferred through clipboard.
const int kClipboardFastIterationNum = 3;
// We add this prefix to HTML markup, so that GetHTMLCharset can correctly
// detect the HTML as UTF-8 encoded.
static const char kHTMLMarkupPrefix[] =
R"(<meta http-equiv="content-type" content="text/html; charset=utf-8">)";
static const char kURIListMime[] = "text/uri-list";
ClipboardTargets nsRetrievalContext::sClipboardTargets;
ClipboardTargets nsRetrievalContext::sPrimaryTargets;
// Callback when someone asks us for the data
void clipboard_get_cb(GtkClipboard* aGtkClipboard,
GtkSelectionData* aSelectionData, guint info,
gpointer user_data);
// Callback when someone asks us to clear a clipboard
void clipboard_clear_cb(GtkClipboard* aGtkClipboard, gpointer user_data);
static bool GetHTMLCharset(Span<const char> aData, nsCString& str);
static void SetTransferableData(nsITransferable* aTransferable,
const nsACString& aFlavor,
const char* aClipboardData,
uint32_t aClipboardDataLength) {
LOGCLIP("SetTransferableData MIME %s\n", PromiseFlatCString(aFlavor).get());
nsCOMPtr<nsISupports> wrapper;
nsPrimitiveHelpers::CreatePrimitiveForData(
aFlavor, aClipboardData, aClipboardDataLength, getter_AddRefs(wrapper));
aTransferable->SetTransferData(PromiseFlatCString(aFlavor).get(), wrapper);
}
ClipboardTargets ClipboardTargets::Clone() {
ClipboardTargets ret;
ret.mCount = mCount;
if (mCount) {
ret.mTargets.reset(
reinterpret_cast<GdkAtom*>(g_malloc(sizeof(GdkAtom) * mCount)));
memcpy(ret.mTargets.get(), mTargets.get(), sizeof(GdkAtom) * mCount);
}
return ret;
}
void ClipboardTargets::Set(ClipboardTargets aTargets) {
mCount = aTargets.mCount;
mTargets = std::move(aTargets.mTargets);
}
void ClipboardData::SetData(Span<const uint8_t> aData) {
mData = nullptr;
mLength = aData.Length();
if (mLength) {
mData.reset(reinterpret_cast<char*>(g_malloc(sizeof(char) * mLength)));
memcpy(mData.get(), aData.data(), sizeof(char) * mLength);
}
}
void ClipboardData::SetText(Span<const char> aData) {
mData = nullptr;
mLength = aData.Length();
if (mLength) {
mData.reset(
reinterpret_cast<char*>(g_malloc(sizeof(char) * (mLength + 1))));
memcpy(mData.get(), aData.data(), sizeof(char) * mLength);
mData.get()[mLength] = '\0';
}
}
void ClipboardData::SetTargets(ClipboardTargets aTargets) {
mLength = aTargets.mCount;
mData.reset(reinterpret_cast<char*>(aTargets.mTargets.release()));
}
ClipboardTargets ClipboardData::ExtractTargets() {
GUniquePtr<GdkAtom> targets(reinterpret_cast<GdkAtom*>(mData.release()));
uint32_t length = std::exchange(mLength, 0);
return ClipboardTargets{std::move(targets), length};
}
GdkAtom GetSelectionAtom(int32_t aWhichClipboard) {
if (aWhichClipboard == nsIClipboard::kGlobalClipboard)
return GDK_SELECTION_CLIPBOARD;
return GDK_SELECTION_PRIMARY;
}
int GetGeckoClipboardType(GtkClipboard* aGtkClipboard) {
if (aGtkClipboard == gtk_clipboard_get(GDK_SELECTION_PRIMARY))
return nsClipboard::kSelectionClipboard;
else if (aGtkClipboard == gtk_clipboard_get(GDK_SELECTION_CLIPBOARD))
return nsClipboard::kGlobalClipboard;
return -1; // THAT AIN'T NO CLIPBOARD I EVER HEARD OF
}
void nsRetrievalContext::ClearCachedTargetsClipboard(GtkClipboard* aClipboard,
GdkEvent* aEvent,
gpointer data) {
LOGCLIP("nsRetrievalContext::ClearCachedTargetsClipboard()");
sClipboardTargets.Clear();
}
void nsRetrievalContext::ClearCachedTargetsPrimary(GtkClipboard* aClipboard,
GdkEvent* aEvent,
gpointer data) {
LOGCLIP("nsRetrievalContext::ClearCachedTargetsPrimary()");
sPrimaryTargets.Clear();
}
ClipboardTargets nsRetrievalContext::GetTargets(int32_t aWhichClipboard) {
LOGCLIP("nsRetrievalContext::GetTargets(%s)\n",
aWhichClipboard == nsClipboard::kSelectionClipboard ? "primary"
: "clipboard");
ClipboardTargets& storedTargets =
(aWhichClipboard == nsClipboard::kSelectionClipboard) ? sPrimaryTargets
: sClipboardTargets;
if (!storedTargets) {
LOGCLIP(" getting targets from system");
storedTargets.Set(GetTargetsImpl(aWhichClipboard));
} else {
LOGCLIP(" using cached targets");
}
return storedTargets.Clone();
}
nsRetrievalContext::nsRetrievalContext() {
g_signal_connect(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD), "owner-change",
G_CALLBACK(ClearCachedTargetsClipboard), this);
g_signal_connect(gtk_clipboard_get(GDK_SELECTION_PRIMARY), "owner-change",
G_CALLBACK(ClearCachedTargetsPrimary), this);
}
nsRetrievalContext::~nsRetrievalContext() {
g_signal_handlers_disconnect_by_func(
gtk_clipboard_get(GDK_SELECTION_CLIPBOARD),
FuncToGpointer(ClearCachedTargetsClipboard), this);
g_signal_handlers_disconnect_by_func(
gtk_clipboard_get(GDK_SELECTION_PRIMARY),
FuncToGpointer(ClearCachedTargetsPrimary), this);
sClipboardTargets.Clear();
sPrimaryTargets.Clear();
}
nsClipboard::nsClipboard() = default;
nsClipboard::~nsClipboard() {
// We have to clear clipboard before gdk_display_close() call.
// See bug 531580 for details.
if (mGlobalTransferable) {
gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD));
}
if (mSelectionTransferable) {
gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_PRIMARY));
}
}
NS_IMPL_ISUPPORTS(nsClipboard, nsIClipboard, nsIObserver)
nsresult nsClipboard::Init(void) {
#if defined(MOZ_X11)
if (widget::GdkIsX11Display()) {
mContext = new nsRetrievalContextX11();
}
#endif
#if defined(MOZ_WAYLAND)
if (widget::GdkIsWaylandDisplay()) {
mContext = new nsRetrievalContextWayland();
}
#endif
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->AddObserver(this, "xpcom-shutdown", false);
}
return NS_OK;
}
NS_IMETHODIMP
nsClipboard::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
// Save global clipboard content to CLIPBOARD_MANAGER.
// gtk_clipboard_store() can run an event loop, so call from a dedicated
// runnable.
return SchedulerGroup::Dispatch(
TaskCategory::Other,
NS_NewRunnableFunction("gtk_clipboard_store()", []() {
LOGCLIP("nsClipboard storing clipboard content\n");
gtk_clipboard_store(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD));
}));
}
NS_IMETHODIMP
nsClipboard::SetData(nsITransferable* aTransferable, nsIClipboardOwner* aOwner,
int32_t aWhichClipboard) {
// See if we can short cut
if ((aWhichClipboard == kGlobalClipboard &&
aTransferable == mGlobalTransferable.get() &&
aOwner == mGlobalOwner.get()) ||
(aWhichClipboard == kSelectionClipboard &&
aTransferable == mSelectionTransferable.get() &&
aOwner == mSelectionOwner.get())) {
return NS_OK;
}
LOGCLIP("nsClipboard::SetData (%s)\n",
aWhichClipboard == kSelectionClipboard ? "primary" : "clipboard");
// List of suported targets
GtkTargetList* list = gtk_target_list_new(nullptr, 0);
// Get the types of supported flavors
nsTArray<nsCString> flavors;
nsresult rv = aTransferable->FlavorsTransferableCanExport(flavors);
if (NS_FAILED(rv)) {
LOGCLIP(" FlavorsTransferableCanExport failed!\n");
// Fall through. |gtkTargets| will be null below.
}
// Add all the flavors to this widget's supported type.
bool imagesAdded = false;
for (uint32_t i = 0; i < flavors.Length(); i++) {
nsCString& flavorStr = flavors[i];
LOGCLIP(" processing target %s\n", flavorStr.get());
// Special case text/unicode since we can handle all of the string types.
if (flavorStr.EqualsLiteral(kUnicodeMime)) {
LOGCLIP(" adding TEXT targets\n");
gtk_target_list_add_text_targets(list, 0);
continue;
}
if (nsContentUtils::IsFlavorImage(flavorStr)) {
// Don't bother adding image targets twice
if (!imagesAdded) {
// accept any writable image type
LOGCLIP(" adding IMAGE targets\n");
gtk_target_list_add_image_targets(list, 0, TRUE);
imagesAdded = true;
}
continue;
}
// Add this to our list of valid targets
LOGCLIP(" adding OTHER target %s\n", flavorStr.get());
GdkAtom atom = gdk_atom_intern(flavorStr.get(), FALSE);
gtk_target_list_add(list, atom, 0, 0);
}
// Get GTK clipboard (CLIPBOARD or PRIMARY)
GtkClipboard* gtkClipboard =
gtk_clipboard_get(GetSelectionAtom(aWhichClipboard));
gint numTargets = 0;
GtkTargetEntry* gtkTargets =
gtk_target_table_new_from_list(list, &numTargets);
if (!gtkTargets || numTargets == 0) {
LOGCLIP(
" gtk_target_table_new_from_list() failed or empty list of "
"targets!\n");
// Clear references to the any old data and let GTK know that it is no
// longer available.
EmptyClipboard(aWhichClipboard);
return NS_ERROR_FAILURE;
}
ClearCachedTargets(aWhichClipboard);
// Set getcallback and request to store data after an application exit
if (gtk_clipboard_set_with_data(gtkClipboard, gtkTargets, numTargets,
clipboard_get_cb, clipboard_clear_cb, this)) {
// We managed to set-up the clipboard so update internal state
// We have to set it now because gtk_clipboard_set_with_data() calls
// clipboard_clear_cb() which reset our internal state
if (aWhichClipboard == kSelectionClipboard) {
mSelectionOwner = aOwner;
mSelectionTransferable = aTransferable;
} else {
mGlobalOwner = aOwner;
mGlobalTransferable = aTransferable;
gtk_clipboard_set_can_store(gtkClipboard, gtkTargets, numTargets);
}
rv = NS_OK;
} else {
LOGCLIP(" gtk_clipboard_set_with_data() failed!\n");
EmptyClipboard(aWhichClipboard);
rv = NS_ERROR_FAILURE;
}
gtk_target_table_free(gtkTargets, numTargets);
gtk_target_list_unref(list);
return rv;
}
static bool IsMIMEAtFlavourList(const nsTArray<nsCString>& aFlavourList,
const char* aMime) {
for (const auto& flavorStr : aFlavourList) {
if (flavorStr.Equals(aMime)) {
return true;
}
}
return false;
}
// When clipboard contains only images, X11/Gtk tries to convert them
// to text when we request text instead of just fail to provide the data.
// So if clipboard contains images only remove text MIME offer.
bool nsClipboard::FilterImportedFlavors(int32_t aWhichClipboard,
nsTArray<nsCString>& aFlavors) {
LOGCLIP("nsClipboard::FilterImportedFlavors");
auto targets = mContext->GetTargets(aWhichClipboard);
if (!targets) {
LOGCLIP(" X11: no targes at clipboard (null), quit.\n");
return true;
}
for (const auto& atom : targets.AsSpan()) {
GUniquePtr<gchar> atom_name(gdk_atom_name(atom));
if (!atom_name) {
continue;
}
// Filter out system MIME types.
if (strcmp(atom_name.get(), "TARGETS") == 0 ||
strcmp(atom_name.get(), "TIMESTAMP") == 0 ||
strcmp(atom_name.get(), "SAVE_TARGETS") == 0 ||
strcmp(atom_name.get(), "MULTIPLE") == 0) {
continue;
}
// Filter out types which can't be converted to text.
if (strncmp(atom_name.get(), "image/", 6) == 0 ||
strncmp(atom_name.get(), "application/", 12) == 0 ||
strncmp(atom_name.get(), "audio/", 6) == 0 ||
strncmp(atom_name.get(), "video/", 6) == 0) {
continue;
}
// We have some other MIME type on clipboard which can be hopefully
// converted to text without any problem.
LOGCLIP(" X11: text types in clipboard, no need to filter them.\n");
return true;
}
// So make sure we offer only types we have at clipboard.
nsTArray<nsCString> clipboardFlavors;
for (const auto& atom : targets.AsSpan()) {
GUniquePtr<gchar> atom_name(gdk_atom_name(atom));
if (!atom_name) {
continue;
}
if (IsMIMEAtFlavourList(aFlavors, atom_name.get())) {
clipboardFlavors.AppendElement(nsCString(atom_name.get()));
}
}
aFlavors.SwapElements(clipboardFlavors);
#ifdef MOZ_LOGGING
LOGCLIP(" X11: Flavors which match clipboard content:\n");
for (uint32_t i = 0; i < aFlavors.Length(); i++) {
LOGCLIP(" %s\n", aFlavors[i].get());
}
#endif
return true;
}
static nsresult GetTransferableFlavors(nsITransferable* aTransferable,
nsTArray<nsCString>& aFlavors) {
if (!aTransferable) {
return NS_ERROR_FAILURE;
}
// Get a list of flavors this transferable can import
nsresult rv = aTransferable->FlavorsTransferableCanImport(aFlavors);
if (NS_FAILED(rv)) {
LOGCLIP(" FlavorsTransferableCanImport falied!\n");
return rv;
}
#ifdef MOZ_LOGGING
LOGCLIP(" Flavors which can be imported:");
for (const auto& flavor : aFlavors) {
LOGCLIP(" %s", flavor.get());
}
#endif
return NS_OK;
}
static bool TransferableSetFile(nsITransferable* aTransferable,
const nsACString& aURIList) {
nsresult rv;
nsTArray<nsCString> uris = mozilla::widget::ParseTextURIList(aURIList);
if (!uris.IsEmpty()) {
nsCOMPtr<nsIURI> fileURI;
NS_NewURI(getter_AddRefs(fileURI), uris[0]);
if (nsCOMPtr<nsIFileURL> fileURL = do_QueryInterface(fileURI, &rv)) {
nsCOMPtr<nsIFile> file;
rv = fileURL->GetFile(getter_AddRefs(file));
if (NS_SUCCEEDED(rv)) {
aTransferable->SetTransferData(kFileMime, file);
LOGCLIP(" successfully set file to clipboard\n");
return true;
}
}
}
return false;
}
static bool TransferableSetHTML(nsITransferable* aTransferable,
Span<const char> aData) {
nsLiteralCString mimeType(kHTMLMime);
// Convert text/html into our unicode format
nsAutoCString charset;
if (!GetHTMLCharset(aData, charset)) {
// Fall back to utf-8 in case html/data is missing kHTMLMarkupPrefix.
LOGCLIP("Failed to get html/text encoding, fall back to utf-8.\n");
charset.AssignLiteral("utf-8");
}
LOGCLIP("TransferableSetHTML: HTML detected charset %s", charset.get());
// app which use "text/html" to copy&paste
// get the decoder
auto encoding = Encoding::ForLabelNoReplacement(charset);
if (!encoding) {
LOGCLIP("TransferableSetHTML: get unicode decoder error (charset: %s)",
charset.get());
return false;
}
// According to spec html UTF-16BE/LE should be switched to UTF-8
// https://html.spec.whatwg.org/#determining-the-character-encoding:utf-16-encoding-2
if (encoding == UTF_16LE_ENCODING || encoding == UTF_16BE_ENCODING) {
encoding = UTF_8_ENCODING;
}
// Remove kHTMLMarkupPrefix again, it won't necessarily cause any
// issues, but might confuse other users.
const size_t prefixLen = ArrayLength(kHTMLMarkupPrefix) - 1;
if (aData.Length() >= prefixLen && nsDependentCSubstring(aData.To(prefixLen))
.EqualsLiteral(kHTMLMarkupPrefix)) {
aData = aData.From(prefixLen);
}
nsAutoString unicodeData;
auto [rv, enc] = encoding->Decode(AsBytes(aData), unicodeData);
#if MOZ_LOGGING
if (enc != UTF_8_ENCODING &&
MOZ_LOG_TEST(gClipboardLog, mozilla::LogLevel::Debug)) {
nsCString decoderName;
enc->Name(decoderName);
LOGCLIP("TransferableSetHTML: expected UTF-8 decoder but got %s",
decoderName.get());
}
#endif
if (NS_FAILED(rv)) {
LOGCLIP("TransferableSetHTML: failed to decode HTML");
return false;
}
SetTransferableData(aTransferable, mimeType,
(const char*)unicodeData.BeginReading(),
unicodeData.Length() * sizeof(char16_t));
return true;
}
NS_IMETHODIMP
nsClipboard::GetData(nsITransferable* aTransferable, int32_t aWhichClipboard) {
LOGCLIP("nsClipboard::GetData (%s)\n",
aWhichClipboard == kSelectionClipboard ? "primary" : "clipboard");
// TODO: Ensure we don't re-enter here.
if (!mContext) {
return NS_ERROR_FAILURE;
}
nsTArray<nsCString> flavors;
nsresult rv = GetTransferableFlavors(aTransferable, flavors);
NS_ENSURE_SUCCESS(rv, rv);
// Filter out MIME types on X11 to prevent unwanted conversions,
// see Bug 1611407
if (widget::GdkIsX11Display() &&
!FilterImportedFlavors(aWhichClipboard, flavors)) {
LOGCLIP(" Missing suitable clipboard data, quit.");
return NS_OK;
}
for (uint32_t i = 0; i < flavors.Length(); i++) {
nsCString& flavorStr = flavors[i];
if (flavorStr.EqualsLiteral(kJPEGImageMime) ||
flavorStr.EqualsLiteral(kJPGImageMime) ||
flavorStr.EqualsLiteral(kPNGImageMime) ||
flavorStr.EqualsLiteral(kGIFImageMime)) {
// Emulate support for image/jpg
if (flavorStr.EqualsLiteral(kJPGImageMime)) {
flavorStr.Assign(kJPEGImageMime);
}
LOGCLIP(" Getting image %s MIME clipboard data\n", flavorStr.get());
auto clipboardData =
mContext->GetClipboardData(flavorStr.get(), aWhichClipboard);
if (!clipboardData) {
LOGCLIP(" %s type is missing\n", flavorStr.get());
continue;
}
nsCOMPtr<nsIInputStream> byteStream;
NS_NewByteInputStream(getter_AddRefs(byteStream), clipboardData.AsSpan(),
NS_ASSIGNMENT_COPY);
aTransferable->SetTransferData(flavorStr.get(), byteStream);
LOGCLIP(" got %s MIME data\n", flavorStr.get());
return NS_OK;
}
// Special case text/unicode since we can convert any
// string into text/unicode
if (flavorStr.EqualsLiteral(kUnicodeMime)) {
LOGCLIP(" Getting unicode %s MIME clipboard data\n", flavorStr.get());
auto clipboardData = mContext->GetClipboardText(aWhichClipboard);
if (!clipboardData) {
LOGCLIP(" failed to get unicode data\n");
// If the type was text/unicode and we couldn't get
// text off the clipboard, run the next loop
// iteration.
continue;
}
// Convert utf-8 into our unicode format.
NS_ConvertUTF8toUTF16 ucs2string(clipboardData.get());
SetTransferableData(aTransferable, flavorStr,
(const char*)ucs2string.BeginReading(),
ucs2string.Length() * 2);
LOGCLIP(" got unicode data, length %zd\n", ucs2string.Length());
return NS_OK;
}
if (flavorStr.EqualsLiteral(kFileMime)) {
LOGCLIP(" Getting %s file clipboard data\n", flavorStr.get());
auto clipboardData =
mContext->GetClipboardData(kURIListMime, aWhichClipboard);
if (!clipboardData) {
LOGCLIP(" text/uri-list type is missing\n");
continue;
}
nsDependentCSubstring fileName(clipboardData.AsSpan());
if (!TransferableSetFile(aTransferable, fileName)) {
continue;
}
return NS_OK;
}
LOGCLIP(" Getting %s MIME clipboard data\n", flavorStr.get());
auto clipboardData =
mContext->GetClipboardData(flavorStr.get(), aWhichClipboard);
#ifdef MOZ_LOGGING
if (!clipboardData) {
LOGCLIP(" %s type is missing\n", flavorStr.get());
}
#endif
if (clipboardData) {
LOGCLIP(" got %s mime type data.\n", flavorStr.get());
// Special case text/html since we can convert into UCS2
if (flavorStr.EqualsLiteral(kHTMLMime)) {
if (!TransferableSetHTML(aTransferable, clipboardData.AsSpan())) {
continue;
}
} else {
auto span = clipboardData.AsSpan();
SetTransferableData(aTransferable, flavorStr, span.data(),
span.Length());
}
return NS_OK;
}
}
LOGCLIP(" failed to get clipboard content.\n");
return NS_OK;
}
enum DataType {
DATATYPE_IMAGE,
DATATYPE_FILE,
DATATYPE_HTML,
DATATYPE_RAW,
};
struct DataPromiseHandler {
RefPtr<nsITransferable> mTransferable;
RefPtr<GenericPromise::Private> mDataPromise;
nsCString mMimeType;
DataType mDataType;
explicit DataPromiseHandler(RefPtr<nsITransferable> aTransferable,
RefPtr<GenericPromise::Private> aDataPromise,
const char* aMimeType,
DataType aDataType = DATATYPE_RAW)
: mTransferable(std::move(aTransferable)),
mDataPromise(std::move(aDataPromise)),
mMimeType(aMimeType),
mDataType(aDataType) {
MOZ_COUNT_CTOR(DataPromiseHandler);
LOGCLIP("DataPromiseHandler created [%p] MIME %s type %d", this,
mMimeType.get(), mDataType);
}
~DataPromiseHandler() {
LOGCLIP("DataPromiseHandler deleted [%p]", this);
MOZ_COUNT_DTOR(DataPromiseHandler);
}
};
static RefPtr<GenericPromise> AsyncGetTextImpl(nsITransferable* aTransferable,
int32_t aWhichClipboard) {
LOGCLIP("AsyncGetText() type '%s'",
aWhichClipboard == nsClipboard::kSelectionClipboard ? "primary"
: "clipboard");
RefPtr<GenericPromise::Private> dataPromise =
new GenericPromise::Private(__func__);
gtk_clipboard_request_text(
gtk_clipboard_get(GetSelectionAtom(aWhichClipboard)),
[](GtkClipboard* aClipboard, const gchar* aText, gpointer aData) -> void {
UniquePtr<DataPromiseHandler> ref(
static_cast<DataPromiseHandler*>(aData));
LOGCLIP("AsyncGetText async handler of [%p]", aData);
size_t dataLength = aText ? strlen(aText) : 0;
if (dataLength <= 0) {
ref->mDataPromise->Resolve(false, __func__);
LOGCLIP(" quit, text is not available");
return;
}
// Convert utf-8 into our unicode format.
NS_ConvertUTF8toUTF16 utf16string(aText, dataLength);
nsLiteralCString flavor(kUnicodeMime);
SetTransferableData(ref->mTransferable, flavor,
(const char*)utf16string.BeginReading(),
utf16string.Length() * 2);
LOGCLIP(" text is set, length = %d", (int)dataLength);
ref->mDataPromise->Resolve(true, __func__);
},
new DataPromiseHandler(aTransferable, dataPromise, kUnicodeMime));
return dataPromise;
}
static RefPtr<GenericPromise> AsyncGetDataImpl(nsITransferable* aTransferable,
int32_t aWhichClipboard,
const char* aMimeType,
DataType aDataType) {
LOGCLIP("AsyncGetText() type '%s'",
aWhichClipboard == nsClipboard::kSelectionClipboard ? "primary"
: "clipboard");
RefPtr<GenericPromise::Private> dataPromise =
new GenericPromise::Private(__func__);
const char* gtkMIMEType = nullptr;
switch (aDataType) {
case DATATYPE_FILE:
// Don't ask Gtk for application/x-moz-file
gtkMIMEType = kURIListMime;
break;
case DATATYPE_IMAGE:
case DATATYPE_HTML:
case DATATYPE_RAW:
gtkMIMEType = aMimeType;
break;
}
gtk_clipboard_request_contents(
gtk_clipboard_get(GetSelectionAtom(aWhichClipboard)),
gdk_atom_intern(gtkMIMEType, FALSE),
[](GtkClipboard* aClipboard, GtkSelectionData* aSelection,
gpointer aData) -> void {
UniquePtr<DataPromiseHandler> ref(
static_cast<DataPromiseHandler*>(aData));
LOGCLIP("AsyncGetData async handler [%p] MIME %s type %d", aData,
ref->mMimeType.get(), ref->mDataType);
int dataLength = gtk_selection_data_get_length(aSelection);
if (dataLength <= 0) {
ref->mDataPromise->Resolve(false, __func__);
return;
}
const char* data = (const char*)gtk_selection_data_get_data(aSelection);
if (!data) {
ref->mDataPromise->Resolve(false, __func__);
return;
}
switch (ref->mDataType) {
case DATATYPE_IMAGE: {
LOGCLIP(" set image clipboard data");
nsCOMPtr<nsIInputStream> byteStream;
NS_NewByteInputStream(getter_AddRefs(byteStream),
Span(data, dataLength), NS_ASSIGNMENT_COPY);
ref->mTransferable->SetTransferData(ref->mMimeType.get(),
byteStream);
break;
}
case DATATYPE_FILE: {
LOGCLIP(" set file clipboard data");
nsDependentCSubstring file(data, dataLength);
TransferableSetFile(ref->mTransferable, file);
break;
}
case DATATYPE_HTML: {
LOGCLIP(" html clipboard data");
Span dataSpan(data, dataLength);
TransferableSetHTML(ref->mTransferable, dataSpan);
break;
}
case DATATYPE_RAW: {
LOGCLIP(" raw clipboard data %s", ref->mMimeType.get());
SetTransferableData(ref->mTransferable, ref->mMimeType, data,
dataLength);
break;
}
}
ref->mDataPromise->Resolve(true, __func__);
},
new DataPromiseHandler(aTransferable, dataPromise, aMimeType, aDataType));
return dataPromise;
}
static RefPtr<GenericPromise> AsyncGetDataFlavor(nsITransferable* aTransferable,
int32_t aWhichClipboard,
nsCString& aFlavorStr) {
if (aFlavorStr.EqualsLiteral(kJPEGImageMime) ||
aFlavorStr.EqualsLiteral(kJPGImageMime) ||
aFlavorStr.EqualsLiteral(kPNGImageMime) ||
aFlavorStr.EqualsLiteral(kGIFImageMime)) {
// Emulate support for image/jpg
if (aFlavorStr.EqualsLiteral(kJPGImageMime)) {
aFlavorStr.Assign(kJPEGImageMime);
}
LOGCLIP(" Getting image %s MIME clipboard data", aFlavorStr.get());
return AsyncGetDataImpl(aTransferable, aWhichClipboard, aFlavorStr.get(),
DATATYPE_IMAGE);
}
// Special case text/unicode since we can convert any
// string into text/unicode
if (aFlavorStr.EqualsLiteral(kUnicodeMime)) {
LOGCLIP(" Getting unicode clipboard data");
return AsyncGetTextImpl(aTransferable, aWhichClipboard);
}
if (aFlavorStr.EqualsLiteral(kFileMime)) {
LOGCLIP(" Getting file clipboard data\n");
return AsyncGetDataImpl(aTransferable, aWhichClipboard, aFlavorStr.get(),
DATATYPE_FILE);
}
if (aFlavorStr.EqualsLiteral(kHTMLMime)) {
LOGCLIP(" Getting HTML clipboard data");
return AsyncGetDataImpl(aTransferable, aWhichClipboard, aFlavorStr.get(),
DATATYPE_HTML);
}
LOGCLIP(" Getting raw %s MIME clipboard data\n", aFlavorStr.get());
return AsyncGetDataImpl(aTransferable, aWhichClipboard, aFlavorStr.get(),
DATATYPE_RAW);
}
RefPtr<GenericPromise> nsClipboard::AsyncGetData(nsITransferable* aTransferable,
int32_t aWhichClipboard) {
LOGCLIP("nsClipboard::AsyncGetData (%s)",
aWhichClipboard == nsClipboard::kSelectionClipboard ? "primary"
: "clipboard");
nsTArray<nsCString> importedFlavors;
nsresult rv = GetTransferableFlavors(aTransferable, importedFlavors);
NS_ENSURE_SUCCESS(rv, GenericPromise::CreateAndReject(rv, __func__));
auto flavorsNum = importedFlavors.Length();
if (!flavorsNum) {
return GenericPromise::CreateAndResolve(false, __func__);
}
#ifdef MOZ_LOGGING
if (flavorsNum > 1) {
LOGCLIP(" Only first MIME type (%s) will be imported from clipboard!",
importedFlavors[0].get());
}
#endif
// Filter out MIME types on X11 to prevent unwanted conversions,
// see Bug 1611407
if (widget::GdkIsX11Display()) {
return AsyncHasDataMatchingFlavors(importedFlavors, aWhichClipboard)
->Then(
GetMainThreadSerialEventTarget(), __func__,
/* resolve */
[transferable = RefPtr{aTransferable},
aWhichClipboard](nsTArray<nsCString> clipboardFlavors) {
if (!clipboardFlavors.Length()) {
LOGCLIP(" no flavors in clipboard, quit.");
return GenericPromise::CreateAndResolve(false, __func__);
}
return AsyncGetDataFlavor(transferable, aWhichClipboard,
clipboardFlavors[0]);
},
/* reject */
[](nsresult rv) {
LOGCLIP(" failed to get flavors from clipboard, quit.");
return GenericPromise::CreateAndReject(rv, __func__);
});
}
// Read clipboard directly on Wayland
return AsyncGetDataFlavor(aTransferable, aWhichClipboard, importedFlavors[0]);
}
NS_IMETHODIMP
nsClipboard::EmptyClipboard(int32_t aWhichClipboard) {
LOGCLIP("nsClipboard::EmptyClipboard (%s)\n",
aWhichClipboard == kSelectionClipboard ? "primary" : "clipboard");
if (aWhichClipboard == kSelectionClipboard) {
if (mSelectionTransferable) {
gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_PRIMARY));
MOZ_ASSERT(!mSelectionTransferable);
}
} else {
if (mGlobalTransferable) {
gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD));
MOZ_ASSERT(!mGlobalTransferable);
}
}
ClearCachedTargets(aWhichClipboard);
return NS_OK;
}
void nsClipboard::ClearTransferable(int32_t aWhichClipboard) {
if (aWhichClipboard == kSelectionClipboard) {
if (mSelectionOwner) {
mSelectionOwner->LosingOwnership(mSelectionTransferable);
mSelectionOwner = nullptr;
}
mSelectionTransferable = nullptr;
} else {
if (mGlobalOwner) {
mGlobalOwner->LosingOwnership(mGlobalTransferable);
mGlobalOwner = nullptr;
}
mGlobalTransferable = nullptr;
}
}
static bool FlavorMatchesTarget(const nsACString& aFlavor, GdkAtom aTarget) {
GUniquePtr<gchar> atom_name(gdk_atom_name(aTarget));
if (!atom_name) {
return false;
}
if (aFlavor.Equals(atom_name.get())) {
LOGCLIP(" has %s\n", atom_name.get());
return true;
}
// X clipboard supports image/jpeg, but we want to emulate support
// for image/jpg as well
if (aFlavor.EqualsLiteral(kJPGImageMime) &&
!strcmp(atom_name.get(), kJPEGImageMime)) {
LOGCLIP(" has image/jpg\n");
return true;
}
// application/x-moz-file should be treated like text/uri-list
if (aFlavor.EqualsLiteral(kFileMime) &&
!strcmp(atom_name.get(), kURIListMime)) {
LOGCLIP(" has text/uri-list treating as application/x-moz-file");
return true;
}
return false;
}
NS_IMETHODIMP
nsClipboard::HasDataMatchingFlavors(const nsTArray<nsCString>& aFlavorList,
int32_t aWhichClipboard, bool* _retval) {
if (!_retval) {
return NS_ERROR_NULL_POINTER;
}
LOGCLIP("nsClipboard::HasDataMatchingFlavors (%s)\n",
aWhichClipboard == kSelectionClipboard ? "primary" : "clipboard");
*_retval = false;
if (!mContext) {
return NS_ERROR_FAILURE;
}
auto targets = mContext->GetTargets(aWhichClipboard);
if (!targets) {
LOGCLIP(" no targes at clipboard (null)\n");
return NS_OK;
}
#ifdef MOZ_LOGGING
if (LOGCLIP_ENABLED()) {
LOGCLIP(" Asking for content:\n");
for (auto& flavor : aFlavorList) {
LOGCLIP(" MIME %s\n", flavor.get());
}
LOGCLIP(" Clipboard content (target nums %zu):\n",
targets.AsSpan().Length());
for (const auto& target : targets.AsSpan()) {
GUniquePtr<gchar> atom_name(gdk_atom_name(target));
if (!atom_name) {
LOGCLIP(" failed to get MIME\n");
continue;
}
LOGCLIP(" MIME %s\n", atom_name.get());
}
}
#endif
// Walk through the provided types and try to match it to a
// provided type.
for (auto& flavor : aFlavorList) {
// We special case text/unicode here.
if (flavor.EqualsLiteral(kUnicodeMime) &&
gtk_targets_include_text(targets.AsSpan().data(),
targets.AsSpan().Length())) {
*_retval = true;
LOGCLIP(" has kUnicodeMime\n");
return NS_OK;
}
for (const auto& target : targets.AsSpan()) {
if (FlavorMatchesTarget(flavor, target)) {
*_retval = true;
return NS_OK;
}
}
}
LOGCLIP(" no targes at clipboard (bad match)\n");
return NS_OK;
}
struct TragetPromiseHandler {