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gecko-dev/widget/gtk/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"
#include "nsClipboardX11.h"
#if defined(MOZ_WAYLAND)
# include "nsClipboardWayland.h"
#endif
#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/SchedulerGroup.h"
#include "mozilla/StaticPrefs_widget.h"
#include "mozilla/TimeStamp.h"
#include "WidgetUtilsGtk.h"
#include "imgIContainer.h"
#include <gtk/gtk.h>
#include <gtk/gtkx.h>
#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";
// 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 ConvertHTMLtoUCS2(Span<const char> aData, nsCString& charset,
char16_t** unicodeData, int32_t& outUnicodeLen);
static bool GetHTMLCharset(Span<const char> aData, nsCString& str);
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
}
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 (widget::GdkIsX11Display()) {
mContext = new nsRetrievalContextX11();
#if defined(MOZ_WAYLAND)
} else if (widget::GdkIsWaylandDisplay()) {
mContext = new nsRetrievalContextWayland();
#endif
} else {
NS_WARNING("Missing nsRetrievalContext for nsClipboard!");
return NS_OK;
}
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;
}
// 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;
}
void nsClipboard::SetTransferableData(nsITransferable* aTransferable,
nsCString& aFlavor,
const char* aClipboardData,
uint32_t aClipboardDataLength) {
LOGCLIP("nsClipboard::SetTransferableData MIME %s\n", aFlavor.get());
nsCOMPtr<nsISupports> wrapper;
nsPrimitiveHelpers::CreatePrimitiveForData(
aFlavor, aClipboardData, aClipboardDataLength, getter_AddRefs(wrapper));
aTransferable->SetTransferData(aFlavor.get(), wrapper);
}
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;
}
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 (!aTransferable || !mContext) {
return NS_ERROR_FAILURE;
}
// Get a list of flavors this transferable can import
nsTArray<nsCString> flavors;
nsresult rv = aTransferable->FlavorsTransferableCanImport(flavors);
if (NS_FAILED(rv)) {
LOGCLIP(" FlavorsTransferableCanImport falied!\n");
return rv;
}
#ifdef MOZ_LOGGING
LOGCLIP(" Flavors which can be imported:");
for (uint32_t i = 0; i < flavors.Length(); i++) {
LOGCLIP(" %s\n", flavors[i].get());
}
#endif
// 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 data(clipboardData.AsSpan());
nsTArray<nsCString> uris = mozilla::widget::ParseTextURIList(data);
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(flavorStr.get(), file);
LOGCLIP(" successfully set file to clipboard\n");
}
}
}
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)) {
char16_t* htmlBody = nullptr;
int32_t htmlBodyLen = 0;
// Convert text/html into our unicode format
nsAutoCString charset;
if (!GetHTMLCharset(clipboardData.AsSpan(), 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");
}
if (!ConvertHTMLtoUCS2(clipboardData.AsSpan(), charset, &htmlBody,
htmlBodyLen)) {
LOGCLIP(" failed to convert text/html to UCS2.\n");
continue;
}
SetTransferableData(aTransferable, flavorStr, (const char*)htmlBody,
htmlBodyLen * 2);
free(htmlBody);
} 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;
}
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);
}
}
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;
}
}
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(" 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());
}
LOGCLIP(" Asking for content:\n");
for (auto& flavor : aFlavorList) {
LOGCLIP(" MIME %s\n", flavor.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");
break;
}
for (const auto& target : targets.AsSpan()) {
GUniquePtr<gchar> atom_name(gdk_atom_name(target));
if (!atom_name) {
continue;
}
if (flavor.Equals(atom_name.get())) {
LOGCLIP(" has %s\n", atom_name.get());
*_retval = true;
break;
}
// X clipboard supports image/jpeg, but we want to emulate support
// for image/jpg as well
if (flavor.EqualsLiteral(kJPGImageMime) &&
!strcmp(atom_name.get(), kJPEGImageMime)) {
LOGCLIP(" has image/jpg\n");
*_retval = true;
break;
}
// application/x-moz-file should be treated like text/uri-list
if (flavor.EqualsLiteral(kFileMime) &&
!strcmp(atom_name.get(), kURIListMime)) {
LOGCLIP(" has text/uri-list treating as application/x-moz-file");
*_retval = true;
break;
}
}
if (*_retval) {
break;
}
}
#ifdef MOZ_LOGGING
if (!(*_retval)) {
LOGCLIP(" no targes at clipboard (bad match)\n");
}
#endif
return NS_OK;
}
NS_IMETHODIMP
nsClipboard::SupportsSelectionClipboard(bool* _retval) {
*_retval = mContext ? mContext->HasSelectionSupport() : false;
return NS_OK;
}
NS_IMETHODIMP
nsClipboard::SupportsFindClipboard(bool* _retval) {
*_retval = false;
return NS_OK;
}
nsITransferable* nsClipboard::GetTransferable(int32_t aWhichClipboard) {
nsITransferable* retval;
if (aWhichClipboard == kSelectionClipboard)
retval = mSelectionTransferable.get();
else
retval = mGlobalTransferable.get();
return retval;
}
void nsClipboard::SelectionGetEvent(GtkClipboard* aClipboard,
GtkSelectionData* aSelectionData) {
// Someone has asked us to hand them something. The first thing
// that we want to do is see if that something includes text. If
// it does, try to give it text/unicode after converting it to
// utf-8.
int32_t whichClipboard;
// which clipboard?
GdkAtom selection = gtk_selection_data_get_selection(aSelectionData);
if (selection == GDK_SELECTION_PRIMARY)
whichClipboard = kSelectionClipboard;
else if (selection == GDK_SELECTION_CLIPBOARD)
whichClipboard = kGlobalClipboard;
else
return; // THAT AIN'T NO CLIPBOARD I EVER HEARD OF
LOGCLIP("nsClipboard::SelectionGetEvent (%s)\n",
whichClipboard == kSelectionClipboard ? "primary" : "clipboard");
nsCOMPtr<nsITransferable> trans = GetTransferable(whichClipboard);
if (!trans) {
// We have nothing to serve
LOGCLIP("nsClipboard::SelectionGetEvent() - %s clipboard is empty!\n",
whichClipboard == kSelectionClipboard ? "Primary" : "Clipboard");
return;
}
nsresult rv;
nsCOMPtr<nsISupports> item;
GdkAtom selectionTarget = gtk_selection_data_get_target(aSelectionData);
LOGCLIP(" selection target %s\n",
GUniquePtr<gchar>(gdk_atom_name(selectionTarget)).get());
// Check to see if the selection data is some text type.
if (gtk_targets_include_text(&selectionTarget, 1)) {
LOGCLIP(" providing text/unicode data\n");
// Try to convert our internal type into a text string. Get
// the transferable for this clipboard and try to get the
// text/unicode type for it.
rv = trans->GetTransferData("text/unicode", getter_AddRefs(item));
if (NS_FAILED(rv) || !item) {
LOGCLIP(" GetTransferData() failed to get text/unicode!\n");
return;
}
nsCOMPtr<nsISupportsString> wideString;
wideString = do_QueryInterface(item);
if (!wideString) return;
nsAutoString ucs2string;
wideString->GetData(ucs2string);
NS_ConvertUTF16toUTF8 utf8string(ucs2string);
LOGCLIP(" sent %zd bytes of utf-8 data\n", utf8string.Length());
if (selectionTarget == gdk_atom_intern("text/plain;charset=utf-8", FALSE)) {
LOGCLIP(
" using gtk_selection_data_set for 'text/plain;charset=utf-8'\n");
// Bypass gtk_selection_data_set_text, which will convert \n to \r\n
// in some versions of GTK.
gtk_selection_data_set(aSelectionData, selectionTarget, 8,
reinterpret_cast<const guchar*>(utf8string.get()),
utf8string.Length());
} else {
gtk_selection_data_set_text(aSelectionData, utf8string.get(),
utf8string.Length());
}
return;
}
// Check to see if the selection data is an image type
if (gtk_targets_include_image(&selectionTarget, 1, TRUE)) {
LOGCLIP(" providing image data\n");
// Look through our transfer data for the image
static const char* const imageMimeTypes[] = {kNativeImageMime,
kPNGImageMime, kJPEGImageMime,
kJPGImageMime, kGIFImageMime};
nsCOMPtr<nsISupports> imageItem;
nsCOMPtr<imgIContainer> image;
for (uint32_t i = 0; i < ArrayLength(imageMimeTypes); i++) {
rv = trans->GetTransferData(imageMimeTypes[i], getter_AddRefs(imageItem));
if (NS_FAILED(rv)) {
LOGCLIP(" %s is missing at GetTransferData()\n", imageMimeTypes[i]);
continue;
}
image = do_QueryInterface(imageItem);
if (image) {
LOGCLIP(" %s is available at GetTransferData()\n",
imageMimeTypes[i]);
break;
}
}
if (!image) { // Not getting an image for an image mime type!?
LOGCLIP(" Failed to get any image mime from GetTransferData()!\n");
return;
}
GdkPixbuf* pixbuf = nsImageToPixbuf::ImageToPixbuf(image);
if (!pixbuf) {
LOGCLIP(" nsImageToPixbuf::ImageToPixbuf() failed!\n");
return;
}
LOGCLIP(" Setting pixbuf image data as %s\n",
GUniquePtr<gchar>(gdk_atom_name(selectionTarget)).get());
gtk_selection_data_set_pixbuf(aSelectionData, pixbuf);
g_object_unref(pixbuf);
return;
}
if (selectionTarget == gdk_atom_intern(kHTMLMime, FALSE)) {
LOGCLIP(" providing %s data\n", kHTMLMime);
rv = trans->GetTransferData(kHTMLMime, getter_AddRefs(item));
if (NS_FAILED(rv) || !item) {
LOGCLIP(" failed to get %s data by GetTransferData()!\n", kHTMLMime);
return;
}
nsCOMPtr<nsISupportsString> wideString;
wideString = do_QueryInterface(item);
if (!wideString) {
LOGCLIP(" failed to get wideString interface!");
return;
}
nsAutoString ucs2string;
wideString->GetData(ucs2string);
nsAutoCString html;
// Add the prefix so the encoding is correctly detected.
html.AppendLiteral(kHTMLMarkupPrefix);
AppendUTF16toUTF8(ucs2string, html);
LOGCLIP(" Setting %zd bytest of %s data\n", html.Length(),
GUniquePtr<gchar>(gdk_atom_name(selectionTarget)).get());
gtk_selection_data_set(aSelectionData, selectionTarget, 8,
(const guchar*)html.get(), html.Length());
return;
}
LOGCLIP(" Try if we have anything at GetTransferData() for %s\n",
GUniquePtr<gchar>(gdk_atom_name(selectionTarget)).get());
// Try to match up the selection data target to something our
// transferable provides.
GUniquePtr<gchar> target_name(gdk_atom_name(selectionTarget));
if (!target_name) {
LOGCLIP(" Failed to get target name!\n");
return;
}
rv = trans->GetTransferData(target_name.get(), getter_AddRefs(item));
// nothing found?
if (NS_FAILED(rv) || !item) {
LOGCLIP(" Failed to get anything from GetTransferData()!\n");
return;
}
void* primitive_data = nullptr;
uint32_t dataLen = 0;
nsPrimitiveHelpers::CreateDataFromPrimitive(
nsDependentCString(target_name.get()), item, &primitive_data, &dataLen);
if (!primitive_data) {
LOGCLIP(" Failed to get primitive data!\n");
return;
}
LOGCLIP(" Setting %s as a primitive data type, %d bytes\n",
target_name.get(), dataLen);
gtk_selection_data_set(aSelectionData, selectionTarget,
8, /* 8 bits in a unit */
(const guchar*)primitive_data, dataLen);
free(primitive_data);
}
void nsClipboard::SelectionClearEvent(GtkClipboard* aGtkClipboard) {
int32_t whichClipboard = GetGeckoClipboardType(aGtkClipboard);
if (whichClipboard < 0) {
return;
}
LOGCLIP("nsClipboard::SelectionClearEvent (%s)\n",
whichClipboard == kSelectionClipboard ? "primary" : "clipboard");
ClearTransferable(whichClipboard);
}
void clipboard_get_cb(GtkClipboard* aGtkClipboard,
GtkSelectionData* aSelectionData, guint info,
gpointer user_data) {
LOGCLIP("clipboard_get_cb() callback\n");
nsClipboard* aClipboard = static_cast<nsClipboard*>(user_data);
aClipboard->SelectionGetEvent(aGtkClipboard, aSelectionData);
}
void clipboard_clear_cb(GtkClipboard* aGtkClipboard, gpointer user_data) {
LOGCLIP("clipboard_clear_cb() callback\n");
nsClipboard* aClipboard = static_cast<nsClipboard*>(user_data);
aClipboard->SelectionClearEvent(aGtkClipboard);
}
/*
* when copy-paste, mozilla wants data encoded using UCS2,
* other app such as StarOffice use "text/html"(RFC2854).
* This function convert data(got from GTK clipboard)
* to data mozilla wanted.
*
* data from GTK clipboard can be 3 forms:
* 1. From current mozilla
* "text/html", charset = utf-16
* 2. From old version mozilla or mozilla-based app
* content("body" only), charset = utf-16
* 3. From other app who use "text/html" when copy-paste
* "text/html", has "charset" info
*
* data : got from GTK clipboard
* dataLength: got from GTK clipboard
* body : pass to Mozilla
* bodyLength: pass to Mozilla
*/
bool ConvertHTMLtoUCS2(Span<const char> aData, nsCString& charset,
char16_t** unicodeData, int32_t& outUnicodeLen) {
if (charset.EqualsLiteral("UTF-16")) { // current mozilla
outUnicodeLen = (aData.Length() / 2) - 1;
*unicodeData = reinterpret_cast<char16_t*>(
moz_xmalloc((outUnicodeLen + sizeof('\0')) * sizeof(char16_t)));
memcpy(*unicodeData, aData.data() + sizeof(char16_t),
outUnicodeLen * sizeof(char16_t));
(*unicodeData)[outUnicodeLen] = '\0';
return true;
}
if (charset.EqualsLiteral("UNKNOWN")) {
outUnicodeLen = 0;
return false;
}
// app which use "text/html" to copy&paste
// get the decoder
auto encoding = Encoding::ForLabelNoReplacement(charset);
if (!encoding) {
LOGCLIP("ConvertHTMLtoUCS2: get unicode decoder error\n");
outUnicodeLen = 0;
return false;
}
// 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);
}
auto decoder = encoding->NewDecoder();
CheckedInt<size_t> needed = decoder->MaxUTF16BufferLength(aData.Length());
if (!needed.isValid() || needed.value() > INT32_MAX) {
outUnicodeLen = 0;
return false;
}
outUnicodeLen = 0;
if (needed.value()) {
*unicodeData = reinterpret_cast<char16_t*>(
moz_xmalloc((needed.value() + 1) * sizeof(char16_t)));
uint32_t result;
size_t read;
size_t written;
std::tie(result, read, written, std::ignore) = decoder->DecodeToUTF16(
AsBytes(aData), Span(*unicodeData, needed.value()), true);
MOZ_ASSERT(result == kInputEmpty);
MOZ_ASSERT(read == size_t(aData.Length()));
MOZ_ASSERT(written <= needed.value());
outUnicodeLen = written;
// null terminate.
(*unicodeData)[outUnicodeLen] = '\0';
return true;
} // if valid length
return false;
}
/*
* get "charset" information from clipboard data
* return value can be:
* 1. "UTF-16": mozilla or "text/html" with "charset=utf-16"
* 2. "UNKNOWN": mozilla can't detect what encode it use
* 3. other: "text/html" with other charset than utf-16
*/
bool GetHTMLCharset(Span<const char> aData, nsCString& str) {
// if detect "FFFE" or "FEFF", assume UTF-16
{
char16_t* beginChar = (char16_t*)aData.data();
if ((beginChar[0] == 0xFFFE) || (beginChar[0] == 0xFEFF)) {
str.AssignLiteral("UTF-16");
LOGCLIP("GetHTMLCharset: Charset of HTML is UTF-16\n");
return true;
}
}
// no "FFFE" and "FEFF", assume ASCII first to find "charset" info
const nsDependentCSubstring htmlStr(aData);
nsACString::const_iterator start, end;
htmlStr.BeginReading(start);
htmlStr.EndReading(end);
nsACString::const_iterator valueStart(start), valueEnd(start);
if (CaseInsensitiveFindInReadable("CONTENT=\"text/html;"_ns, start, end)) {
start = end;
htmlStr.EndReading(end);
if (CaseInsensitiveFindInReadable("charset="_ns, start, end)) {
valueStart = end;
start = end;
htmlStr.EndReading(end);
if (FindCharInReadable('"', start, end)) valueEnd = start;
}
}
// find "charset" in HTML
if (valueStart != valueEnd) {
str = Substring(valueStart, valueEnd);
ToUpperCase(str);
LOGCLIP("GetHTMLCharset: Charset of HTML = %s\n", str.get());
return true;
}
str.AssignLiteral("UNKNOWN");
LOGCLIP("GetHTMLCharset: Failed to get HTML Charset!\n");
return false;
}
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