1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gtk/nsClipboard.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,1019 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* vim:expandtab:shiftwidth=4:tabstop=4:
1.6 + */
1.7 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#include "mozilla/ArrayUtils.h"
1.12 +
1.13 +#include "nsClipboard.h"
1.14 +#include "nsSupportsPrimitives.h"
1.15 +#include "nsString.h"
1.16 +#include "nsReadableUtils.h"
1.17 +#include "nsXPIDLString.h"
1.18 +#include "nsPrimitiveHelpers.h"
1.19 +#include "nsICharsetConverterManager.h"
1.20 +#include "nsIServiceManager.h"
1.21 +#include "nsImageToPixbuf.h"
1.22 +#include "nsStringStream.h"
1.23 +#include "nsIObserverService.h"
1.24 +#include "mozilla/Services.h"
1.25 +#include "mozilla/RefPtr.h"
1.26 +#include "mozilla/TimeStamp.h"
1.27 +
1.28 +#include "imgIContainer.h"
1.29 +
1.30 +#include <gtk/gtk.h>
1.31 +
1.32 +// For manipulation of the X event queue
1.33 +#include <X11/Xlib.h>
1.34 +#include <gdk/gdkx.h>
1.35 +#include <sys/time.h>
1.36 +#include <sys/types.h>
1.37 +#include <errno.h>
1.38 +#include <unistd.h>
1.39 +
1.40 +using namespace mozilla;
1.41 +
1.42 +// Callback when someone asks us for the data
1.43 +void
1.44 +clipboard_get_cb(GtkClipboard *aGtkClipboard,
1.45 + GtkSelectionData *aSelectionData,
1.46 + guint info,
1.47 + gpointer user_data);
1.48 +
1.49 +// Callback when someone asks us to clear a clipboard
1.50 +void
1.51 +clipboard_clear_cb(GtkClipboard *aGtkClipboard,
1.52 + gpointer user_data);
1.53 +
1.54 +static void
1.55 +ConvertHTMLtoUCS2 (guchar *data,
1.56 + int32_t dataLength,
1.57 + char16_t **unicodeData,
1.58 + int32_t &outUnicodeLen);
1.59 +
1.60 +static void
1.61 +GetHTMLCharset (guchar * data, int32_t dataLength, nsCString& str);
1.62 +
1.63 +
1.64 +// Our own versions of gtk_clipboard_wait_for_contents and
1.65 +// gtk_clipboard_wait_for_text, which don't run the event loop while
1.66 +// waiting for the data. This prevents a lot of problems related to
1.67 +// dispatching events at unexpected times.
1.68 +
1.69 +static GtkSelectionData *
1.70 +wait_for_contents (GtkClipboard *clipboard, GdkAtom target);
1.71 +
1.72 +static gchar *
1.73 +wait_for_text (GtkClipboard *clipboard);
1.74 +
1.75 +nsClipboard::nsClipboard()
1.76 +{
1.77 +}
1.78 +
1.79 +nsClipboard::~nsClipboard()
1.80 +{
1.81 + // We have to clear clipboard before gdk_display_close() call.
1.82 + // See bug 531580 for details.
1.83 + if (mGlobalTransferable) {
1.84 + gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_CLIPBOARD));
1.85 + }
1.86 + if (mSelectionTransferable) {
1.87 + gtk_clipboard_clear(gtk_clipboard_get(GDK_SELECTION_PRIMARY));
1.88 + }
1.89 +}
1.90 +
1.91 +NS_IMPL_ISUPPORTS(nsClipboard, nsIClipboard)
1.92 +
1.93 +nsresult
1.94 +nsClipboard::Init(void)
1.95 +{
1.96 + nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
1.97 + if (!os)
1.98 + return NS_ERROR_FAILURE;
1.99 +
1.100 + os->AddObserver(this, "quit-application", false);
1.101 +
1.102 + return NS_OK;
1.103 +}
1.104 +
1.105 +NS_IMETHODIMP
1.106 +nsClipboard::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *aData)
1.107 +{
1.108 + if (strcmp(aTopic, "quit-application") == 0) {
1.109 + // application is going to quit, save clipboard content
1.110 + Store();
1.111 + }
1.112 + return NS_OK;
1.113 +}
1.114 +
1.115 +nsresult
1.116 +nsClipboard::Store(void)
1.117 +{
1.118 + // Ask the clipboard manager to store the current clipboard content
1.119 + if (mGlobalTransferable) {
1.120 + GtkClipboard *clipboard = gtk_clipboard_get(GDK_SELECTION_CLIPBOARD);
1.121 + gtk_clipboard_store(clipboard);
1.122 + }
1.123 + return NS_OK;
1.124 +}
1.125 +
1.126 +NS_IMETHODIMP
1.127 +nsClipboard::SetData(nsITransferable *aTransferable,
1.128 + nsIClipboardOwner *aOwner, int32_t aWhichClipboard)
1.129 +{
1.130 + // See if we can short cut
1.131 + if ((aWhichClipboard == kGlobalClipboard &&
1.132 + aTransferable == mGlobalTransferable.get() &&
1.133 + aOwner == mGlobalOwner.get()) ||
1.134 + (aWhichClipboard == kSelectionClipboard &&
1.135 + aTransferable == mSelectionTransferable.get() &&
1.136 + aOwner == mSelectionOwner.get())) {
1.137 + return NS_OK;
1.138 + }
1.139 +
1.140 + nsresult rv;
1.141 + if (!mPrivacyHandler) {
1.142 + rv = NS_NewClipboardPrivacyHandler(getter_AddRefs(mPrivacyHandler));
1.143 + NS_ENSURE_SUCCESS(rv, rv);
1.144 + }
1.145 + rv = mPrivacyHandler->PrepareDataForClipboard(aTransferable);
1.146 + NS_ENSURE_SUCCESS(rv, rv);
1.147 +
1.148 + // Clear out the clipboard in order to set the new data
1.149 + EmptyClipboard(aWhichClipboard);
1.150 +
1.151 + // List of suported targets
1.152 + GtkTargetList *list = gtk_target_list_new(nullptr, 0);
1.153 +
1.154 + // Get the types of supported flavors
1.155 + nsCOMPtr<nsISupportsArray> flavors;
1.156 +
1.157 + rv = aTransferable->FlavorsTransferableCanExport(getter_AddRefs(flavors));
1.158 + if (!flavors || NS_FAILED(rv))
1.159 + return NS_ERROR_FAILURE;
1.160 +
1.161 + // Add all the flavors to this widget's supported type.
1.162 + bool imagesAdded = false;
1.163 + uint32_t count;
1.164 + flavors->Count(&count);
1.165 + for (uint32_t i=0; i < count; i++) {
1.166 + nsCOMPtr<nsISupports> tastesLike;
1.167 + flavors->GetElementAt(i, getter_AddRefs(tastesLike));
1.168 + nsCOMPtr<nsISupportsCString> flavor = do_QueryInterface(tastesLike);
1.169 +
1.170 + if (flavor) {
1.171 + nsXPIDLCString flavorStr;
1.172 + flavor->ToString(getter_Copies(flavorStr));
1.173 +
1.174 + // special case text/unicode since we can handle all of
1.175 + // the string types
1.176 + if (!strcmp(flavorStr, kUnicodeMime)) {
1.177 + gtk_target_list_add(list, gdk_atom_intern("UTF8_STRING", FALSE), 0, 0);
1.178 + gtk_target_list_add(list, gdk_atom_intern("COMPOUND_TEXT", FALSE), 0, 0);
1.179 + gtk_target_list_add(list, gdk_atom_intern("TEXT", FALSE), 0, 0);
1.180 + gtk_target_list_add(list, GDK_SELECTION_TYPE_STRING, 0, 0);
1.181 + continue;
1.182 + }
1.183 +
1.184 + if (flavorStr.EqualsLiteral(kNativeImageMime) ||
1.185 + flavorStr.EqualsLiteral(kPNGImageMime) ||
1.186 + flavorStr.EqualsLiteral(kJPEGImageMime) ||
1.187 + flavorStr.EqualsLiteral(kJPGImageMime) ||
1.188 + flavorStr.EqualsLiteral(kGIFImageMime)) {
1.189 + // don't bother adding image targets twice
1.190 + if (!imagesAdded) {
1.191 + // accept any writable image type
1.192 + gtk_target_list_add_image_targets(list, 0, TRUE);
1.193 + imagesAdded = true;
1.194 + }
1.195 + continue;
1.196 + }
1.197 +
1.198 + // Add this to our list of valid targets
1.199 + GdkAtom atom = gdk_atom_intern(flavorStr, FALSE);
1.200 + gtk_target_list_add(list, atom, 0, 0);
1.201 + }
1.202 + }
1.203 +
1.204 + // Get GTK clipboard (CLIPBOARD or PRIMARY)
1.205 + GtkClipboard *gtkClipboard = gtk_clipboard_get(GetSelectionAtom(aWhichClipboard));
1.206 +
1.207 + gint numTargets;
1.208 + GtkTargetEntry *gtkTargets = gtk_target_table_new_from_list(list, &numTargets);
1.209 +
1.210 + // Set getcallback and request to store data after an application exit
1.211 + if (gtk_clipboard_set_with_data(gtkClipboard, gtkTargets, numTargets,
1.212 + clipboard_get_cb, clipboard_clear_cb, this))
1.213 + {
1.214 + // We managed to set-up the clipboard so update internal state
1.215 + // We have to set it now because gtk_clipboard_set_with_data() calls clipboard_clear_cb()
1.216 + // which reset our internal state
1.217 + if (aWhichClipboard == kSelectionClipboard) {
1.218 + mSelectionOwner = aOwner;
1.219 + mSelectionTransferable = aTransferable;
1.220 + }
1.221 + else {
1.222 + mGlobalOwner = aOwner;
1.223 + mGlobalTransferable = aTransferable;
1.224 + gtk_clipboard_set_can_store(gtkClipboard, gtkTargets, numTargets);
1.225 + }
1.226 +
1.227 + rv = NS_OK;
1.228 + }
1.229 + else {
1.230 + rv = NS_ERROR_FAILURE;
1.231 + }
1.232 +
1.233 + gtk_target_table_free(gtkTargets, numTargets);
1.234 + gtk_target_list_unref(list);
1.235 +
1.236 + return rv;
1.237 +}
1.238 +
1.239 +NS_IMETHODIMP
1.240 +nsClipboard::GetData(nsITransferable *aTransferable, int32_t aWhichClipboard)
1.241 +{
1.242 + if (!aTransferable)
1.243 + return NS_ERROR_FAILURE;
1.244 +
1.245 + GtkClipboard *clipboard;
1.246 + clipboard = gtk_clipboard_get(GetSelectionAtom(aWhichClipboard));
1.247 +
1.248 + guchar *data = nullptr;
1.249 + gint length = 0;
1.250 + bool foundData = false;
1.251 + nsAutoCString foundFlavor;
1.252 +
1.253 + // Get a list of flavors this transferable can import
1.254 + nsCOMPtr<nsISupportsArray> flavors;
1.255 + nsresult rv;
1.256 + rv = aTransferable->FlavorsTransferableCanImport(getter_AddRefs(flavors));
1.257 + if (!flavors || NS_FAILED(rv))
1.258 + return NS_ERROR_FAILURE;
1.259 +
1.260 + uint32_t count;
1.261 + flavors->Count(&count);
1.262 + for (uint32_t i=0; i < count; i++) {
1.263 + nsCOMPtr<nsISupports> genericFlavor;
1.264 + flavors->GetElementAt(i, getter_AddRefs(genericFlavor));
1.265 +
1.266 + nsCOMPtr<nsISupportsCString> currentFlavor;
1.267 + currentFlavor = do_QueryInterface(genericFlavor);
1.268 +
1.269 + if (currentFlavor) {
1.270 + nsXPIDLCString flavorStr;
1.271 + currentFlavor->ToString(getter_Copies(flavorStr));
1.272 +
1.273 + // Special case text/unicode since we can convert any
1.274 + // string into text/unicode
1.275 + if (!strcmp(flavorStr, kUnicodeMime)) {
1.276 + gchar* new_text = wait_for_text(clipboard);
1.277 + if (new_text) {
1.278 + // Convert utf-8 into our unicode format.
1.279 + NS_ConvertUTF8toUTF16 ucs2string(new_text);
1.280 + data = (guchar *)ToNewUnicode(ucs2string);
1.281 + length = ucs2string.Length() * 2;
1.282 + g_free(new_text);
1.283 + foundData = true;
1.284 + foundFlavor = kUnicodeMime;
1.285 + break;
1.286 + }
1.287 + // If the type was text/unicode and we couldn't get
1.288 + // text off the clipboard, run the next loop
1.289 + // iteration.
1.290 + continue;
1.291 + }
1.292 +
1.293 + // For images, we must wrap the data in an nsIInputStream then return instead of break,
1.294 + // because that code below won't help us.
1.295 + if (!strcmp(flavorStr, kJPEGImageMime) ||
1.296 + !strcmp(flavorStr, kJPGImageMime) ||
1.297 + !strcmp(flavorStr, kPNGImageMime) ||
1.298 + !strcmp(flavorStr, kGIFImageMime)) {
1.299 + // Emulate support for image/jpg
1.300 + if (!strcmp(flavorStr, kJPGImageMime)) {
1.301 + flavorStr.Assign(kJPEGImageMime);
1.302 + }
1.303 +
1.304 + GdkAtom atom = gdk_atom_intern(flavorStr, FALSE);
1.305 +
1.306 + GtkSelectionData *selectionData = wait_for_contents(clipboard, atom);
1.307 + if (!selectionData)
1.308 + continue;
1.309 +
1.310 + nsCOMPtr<nsIInputStream> byteStream;
1.311 + NS_NewByteInputStream(getter_AddRefs(byteStream),
1.312 + (const char*)gtk_selection_data_get_data(selectionData),
1.313 + gtk_selection_data_get_length(selectionData),
1.314 + NS_ASSIGNMENT_COPY);
1.315 + aTransferable->SetTransferData(flavorStr, byteStream, sizeof(nsIInputStream*));
1.316 + gtk_selection_data_free(selectionData);
1.317 + return NS_OK;
1.318 + }
1.319 +
1.320 + // Get the atom for this type and try to request it off
1.321 + // the clipboard.
1.322 + GdkAtom atom = gdk_atom_intern(flavorStr, FALSE);
1.323 + GtkSelectionData *selectionData;
1.324 + selectionData = wait_for_contents(clipboard, atom);
1.325 + if (selectionData) {
1.326 + const guchar *clipboardData = gtk_selection_data_get_data(selectionData);
1.327 + length = gtk_selection_data_get_length(selectionData);
1.328 + // Special case text/html since we can convert into UCS2
1.329 + if (!strcmp(flavorStr, kHTMLMime)) {
1.330 + char16_t* htmlBody= nullptr;
1.331 + int32_t htmlBodyLen = 0;
1.332 + // Convert text/html into our unicode format
1.333 + ConvertHTMLtoUCS2(const_cast<guchar*>(clipboardData), length,
1.334 + &htmlBody, htmlBodyLen);
1.335 + // Try next data format?
1.336 + if (!htmlBodyLen)
1.337 + continue;
1.338 + data = (guchar *)htmlBody;
1.339 + length = htmlBodyLen * 2;
1.340 + } else {
1.341 + data = (guchar *)nsMemory::Alloc(length);
1.342 + if (!data)
1.343 + break;
1.344 + memcpy(data, clipboardData, length);
1.345 + }
1.346 + gtk_selection_data_free(selectionData);
1.347 + foundData = true;
1.348 + foundFlavor = flavorStr;
1.349 + break;
1.350 + }
1.351 + }
1.352 + }
1.353 +
1.354 + if (foundData) {
1.355 + nsCOMPtr<nsISupports> wrapper;
1.356 + nsPrimitiveHelpers::CreatePrimitiveForData(foundFlavor.get(),
1.357 + data, length,
1.358 + getter_AddRefs(wrapper));
1.359 + aTransferable->SetTransferData(foundFlavor.get(),
1.360 + wrapper, length);
1.361 + }
1.362 +
1.363 + if (data)
1.364 + nsMemory::Free(data);
1.365 +
1.366 + return NS_OK;
1.367 +}
1.368 +
1.369 +NS_IMETHODIMP
1.370 +nsClipboard::EmptyClipboard(int32_t aWhichClipboard)
1.371 +{
1.372 + if (aWhichClipboard == kSelectionClipboard) {
1.373 + if (mSelectionOwner) {
1.374 + mSelectionOwner->LosingOwnership(mSelectionTransferable);
1.375 + mSelectionOwner = nullptr;
1.376 + }
1.377 + mSelectionTransferable = nullptr;
1.378 + }
1.379 + else {
1.380 + if (mGlobalOwner) {
1.381 + mGlobalOwner->LosingOwnership(mGlobalTransferable);
1.382 + mGlobalOwner = nullptr;
1.383 + }
1.384 + mGlobalTransferable = nullptr;
1.385 + }
1.386 +
1.387 + return NS_OK;
1.388 +}
1.389 +
1.390 +NS_IMETHODIMP
1.391 +nsClipboard::HasDataMatchingFlavors(const char** aFlavorList, uint32_t aLength,
1.392 + int32_t aWhichClipboard, bool *_retval)
1.393 +{
1.394 + if (!aFlavorList || !_retval)
1.395 + return NS_ERROR_NULL_POINTER;
1.396 +
1.397 + *_retval = false;
1.398 +
1.399 + GtkSelectionData *selection_data =
1.400 + GetTargets(GetSelectionAtom(aWhichClipboard));
1.401 + if (!selection_data)
1.402 + return NS_OK;
1.403 +
1.404 + gint n_targets = 0;
1.405 + GdkAtom *targets = nullptr;
1.406 +
1.407 + if (!gtk_selection_data_get_targets(selection_data,
1.408 + &targets, &n_targets) ||
1.409 + !n_targets)
1.410 + return NS_OK;
1.411 +
1.412 + // Walk through the provided types and try to match it to a
1.413 + // provided type.
1.414 + for (uint32_t i = 0; i < aLength && !*_retval; i++) {
1.415 + // We special case text/unicode here.
1.416 + if (!strcmp(aFlavorList[i], kUnicodeMime) &&
1.417 + gtk_selection_data_targets_include_text(selection_data)) {
1.418 + *_retval = true;
1.419 + break;
1.420 + }
1.421 +
1.422 + for (int32_t j = 0; j < n_targets; j++) {
1.423 + gchar *atom_name = gdk_atom_name(targets[j]);
1.424 + if (!atom_name)
1.425 + continue;
1.426 +
1.427 + if (!strcmp(atom_name, aFlavorList[i]))
1.428 + *_retval = true;
1.429 +
1.430 + // X clipboard supports image/jpeg, but we want to emulate support
1.431 + // for image/jpg as well
1.432 + if (!strcmp(aFlavorList[i], kJPGImageMime) && !strcmp(atom_name, kJPEGImageMime))
1.433 + *_retval = true;
1.434 +
1.435 + g_free(atom_name);
1.436 +
1.437 + if (*_retval)
1.438 + break;
1.439 + }
1.440 + }
1.441 + gtk_selection_data_free(selection_data);
1.442 + g_free(targets);
1.443 +
1.444 + return NS_OK;
1.445 +}
1.446 +
1.447 +NS_IMETHODIMP
1.448 +nsClipboard::SupportsSelectionClipboard(bool *_retval)
1.449 +{
1.450 + *_retval = true; // yeah, unix supports the selection clipboard
1.451 + return NS_OK;
1.452 +}
1.453 +
1.454 +NS_IMETHODIMP
1.455 +nsClipboard::SupportsFindClipboard(bool* _retval)
1.456 +{
1.457 + *_retval = false;
1.458 + return NS_OK;
1.459 +}
1.460 +
1.461 +/* static */
1.462 +GdkAtom
1.463 +nsClipboard::GetSelectionAtom(int32_t aWhichClipboard)
1.464 +{
1.465 + if (aWhichClipboard == kGlobalClipboard)
1.466 + return GDK_SELECTION_CLIPBOARD;
1.467 +
1.468 + return GDK_SELECTION_PRIMARY;
1.469 +}
1.470 +
1.471 +/* static */
1.472 +GtkSelectionData *
1.473 +nsClipboard::GetTargets(GdkAtom aWhichClipboard)
1.474 +{
1.475 + GtkClipboard *clipboard = gtk_clipboard_get(aWhichClipboard);
1.476 + return wait_for_contents(clipboard, gdk_atom_intern("TARGETS", FALSE));
1.477 +}
1.478 +
1.479 +nsITransferable *
1.480 +nsClipboard::GetTransferable(int32_t aWhichClipboard)
1.481 +{
1.482 + nsITransferable *retval;
1.483 +
1.484 + if (aWhichClipboard == kSelectionClipboard)
1.485 + retval = mSelectionTransferable.get();
1.486 + else
1.487 + retval = mGlobalTransferable.get();
1.488 +
1.489 + return retval;
1.490 +}
1.491 +
1.492 +void
1.493 +nsClipboard::SelectionGetEvent(GtkClipboard *aClipboard,
1.494 + GtkSelectionData *aSelectionData)
1.495 +{
1.496 + // Someone has asked us to hand them something. The first thing
1.497 + // that we want to do is see if that something includes text. If
1.498 + // it does, try to give it text/unicode after converting it to
1.499 + // utf-8.
1.500 +
1.501 + int32_t whichClipboard;
1.502 +
1.503 + // which clipboard?
1.504 + GdkAtom selection = gtk_selection_data_get_selection(aSelectionData);
1.505 + if (selection == GDK_SELECTION_PRIMARY)
1.506 + whichClipboard = kSelectionClipboard;
1.507 + else if (selection == GDK_SELECTION_CLIPBOARD)
1.508 + whichClipboard = kGlobalClipboard;
1.509 + else
1.510 + return; // THAT AIN'T NO CLIPBOARD I EVER HEARD OF
1.511 +
1.512 + nsCOMPtr<nsITransferable> trans = GetTransferable(whichClipboard);
1.513 + if (!trans) {
1.514 + // We have nothing to serve
1.515 +#ifdef DEBUG_CLIPBOARD
1.516 + printf("nsClipboard::SelectionGetEvent() - %s clipboard is empty!\n",
1.517 + whichClipboard == kSelectionClipboard ? "Selection" : "Global");
1.518 +#endif
1.519 + return;
1.520 + }
1.521 +
1.522 + nsresult rv;
1.523 + nsCOMPtr<nsISupports> item;
1.524 + uint32_t len;
1.525 +
1.526 +
1.527 + GdkAtom selectionTarget = gtk_selection_data_get_target(aSelectionData);
1.528 +
1.529 + // Check to see if the selection data includes any of the string
1.530 + // types that we support.
1.531 + if (selectionTarget == gdk_atom_intern ("STRING", FALSE) ||
1.532 + selectionTarget == gdk_atom_intern ("TEXT", FALSE) ||
1.533 + selectionTarget == gdk_atom_intern ("COMPOUND_TEXT", FALSE) ||
1.534 + selectionTarget == gdk_atom_intern ("UTF8_STRING", FALSE)) {
1.535 + // Try to convert our internal type into a text string. Get
1.536 + // the transferable for this clipboard and try to get the
1.537 + // text/unicode type for it.
1.538 + rv = trans->GetTransferData("text/unicode", getter_AddRefs(item),
1.539 + &len);
1.540 + if (!item || NS_FAILED(rv))
1.541 + return;
1.542 +
1.543 + nsCOMPtr<nsISupportsString> wideString;
1.544 + wideString = do_QueryInterface(item);
1.545 + if (!wideString)
1.546 + return;
1.547 +
1.548 + nsAutoString ucs2string;
1.549 + wideString->GetData(ucs2string);
1.550 + char *utf8string = ToNewUTF8String(ucs2string);
1.551 + if (!utf8string)
1.552 + return;
1.553 +
1.554 + gtk_selection_data_set_text (aSelectionData, utf8string,
1.555 + strlen(utf8string));
1.556 +
1.557 + nsMemory::Free(utf8string);
1.558 + return;
1.559 + }
1.560 +
1.561 + // Check to see if the selection data is an image type
1.562 + if (gtk_targets_include_image(&selectionTarget, 1, TRUE)) {
1.563 + // Look through our transfer data for the image
1.564 + static const char* const imageMimeTypes[] = {
1.565 + kNativeImageMime, kPNGImageMime, kJPEGImageMime, kJPGImageMime, kGIFImageMime };
1.566 + nsCOMPtr<nsISupports> item;
1.567 + uint32_t len;
1.568 + nsCOMPtr<nsISupportsInterfacePointer> ptrPrimitive;
1.569 + for (uint32_t i = 0; !ptrPrimitive && i < ArrayLength(imageMimeTypes); i++) {
1.570 + rv = trans->GetTransferData(imageMimeTypes[i], getter_AddRefs(item), &len);
1.571 + ptrPrimitive = do_QueryInterface(item);
1.572 + }
1.573 + if (!ptrPrimitive)
1.574 + return;
1.575 +
1.576 + nsCOMPtr<nsISupports> primitiveData;
1.577 + ptrPrimitive->GetData(getter_AddRefs(primitiveData));
1.578 + nsCOMPtr<imgIContainer> image(do_QueryInterface(primitiveData));
1.579 + if (!image) // Not getting an image for an image mime type!?
1.580 + return;
1.581 +
1.582 + GdkPixbuf* pixbuf = nsImageToPixbuf::ImageToPixbuf(image);
1.583 + if (!pixbuf)
1.584 + return;
1.585 +
1.586 + gtk_selection_data_set_pixbuf(aSelectionData, pixbuf);
1.587 + g_object_unref(pixbuf);
1.588 + return;
1.589 + }
1.590 +
1.591 + // Try to match up the selection data target to something our
1.592 + // transferable provides.
1.593 + gchar *target_name = gdk_atom_name(selectionTarget);
1.594 + if (!target_name)
1.595 + return;
1.596 +
1.597 + rv = trans->GetTransferData(target_name, getter_AddRefs(item), &len);
1.598 + // nothing found?
1.599 + if (!item || NS_FAILED(rv)) {
1.600 + g_free(target_name);
1.601 + return;
1.602 + }
1.603 +
1.604 + void *primitive_data = nullptr;
1.605 + nsPrimitiveHelpers::CreateDataFromPrimitive(target_name, item,
1.606 + &primitive_data, len);
1.607 +
1.608 + if (primitive_data) {
1.609 + // Check to see if the selection data is text/html
1.610 + if (selectionTarget == gdk_atom_intern (kHTMLMime, FALSE)) {
1.611 + /*
1.612 + * "text/html" can be encoded UCS2. It is recommended that
1.613 + * documents transmitted as UCS2 always begin with a ZERO-WIDTH
1.614 + * NON-BREAKING SPACE character (hexadecimal FEFF, also called
1.615 + * Byte Order Mark (BOM)). Adding BOM can help other app to
1.616 + * detect mozilla use UCS2 encoding when copy-paste.
1.617 + */
1.618 + guchar *buffer = (guchar *)
1.619 + nsMemory::Alloc((len * sizeof(guchar)) + sizeof(char16_t));
1.620 + if (!buffer)
1.621 + return;
1.622 + char16_t prefix = 0xFEFF;
1.623 + memcpy(buffer, &prefix, sizeof(prefix));
1.624 + memcpy(buffer + sizeof(prefix), primitive_data, len);
1.625 + nsMemory::Free((guchar *)primitive_data);
1.626 + primitive_data = (guchar *)buffer;
1.627 + len += sizeof(prefix);
1.628 + }
1.629 +
1.630 + gtk_selection_data_set(aSelectionData, selectionTarget,
1.631 + 8, /* 8 bits in a unit */
1.632 + (const guchar *)primitive_data, len);
1.633 + nsMemory::Free(primitive_data);
1.634 + }
1.635 +
1.636 + g_free(target_name);
1.637 +
1.638 +}
1.639 +
1.640 +void
1.641 +nsClipboard::SelectionClearEvent(GtkClipboard *aGtkClipboard)
1.642 +{
1.643 + int32_t whichClipboard;
1.644 +
1.645 + // which clipboard?
1.646 + if (aGtkClipboard == gtk_clipboard_get(GDK_SELECTION_PRIMARY))
1.647 + whichClipboard = kSelectionClipboard;
1.648 + else if (aGtkClipboard == gtk_clipboard_get(GDK_SELECTION_CLIPBOARD))
1.649 + whichClipboard = kGlobalClipboard;
1.650 + else
1.651 + return; // THAT AIN'T NO CLIPBOARD I EVER HEARD OF
1.652 +
1.653 + EmptyClipboard(whichClipboard);
1.654 +}
1.655 +
1.656 +void
1.657 +clipboard_get_cb(GtkClipboard *aGtkClipboard,
1.658 + GtkSelectionData *aSelectionData,
1.659 + guint info,
1.660 + gpointer user_data)
1.661 +{
1.662 + nsClipboard *aClipboard = static_cast<nsClipboard *>(user_data);
1.663 + aClipboard->SelectionGetEvent(aGtkClipboard, aSelectionData);
1.664 +}
1.665 +
1.666 +void
1.667 +clipboard_clear_cb(GtkClipboard *aGtkClipboard,
1.668 + gpointer user_data)
1.669 +{
1.670 + nsClipboard *aClipboard = static_cast<nsClipboard *>(user_data);
1.671 + aClipboard->SelectionClearEvent(aGtkClipboard);
1.672 +}
1.673 +
1.674 +/*
1.675 + * when copy-paste, mozilla wants data encoded using UCS2,
1.676 + * other app such as StarOffice use "text/html"(RFC2854).
1.677 + * This function convert data(got from GTK clipboard)
1.678 + * to data mozilla wanted.
1.679 + *
1.680 + * data from GTK clipboard can be 3 forms:
1.681 + * 1. From current mozilla
1.682 + * "text/html", charset = utf-16
1.683 + * 2. From old version mozilla or mozilla-based app
1.684 + * content("body" only), charset = utf-16
1.685 + * 3. From other app who use "text/html" when copy-paste
1.686 + * "text/html", has "charset" info
1.687 + *
1.688 + * data : got from GTK clipboard
1.689 + * dataLength: got from GTK clipboard
1.690 + * body : pass to Mozilla
1.691 + * bodyLength: pass to Mozilla
1.692 + */
1.693 +void ConvertHTMLtoUCS2(guchar * data, int32_t dataLength,
1.694 + char16_t** unicodeData, int32_t& outUnicodeLen)
1.695 +{
1.696 + nsAutoCString charset;
1.697 + GetHTMLCharset(data, dataLength, charset);// get charset of HTML
1.698 + if (charset.EqualsLiteral("UTF-16")) {//current mozilla
1.699 + outUnicodeLen = (dataLength / 2) - 1;
1.700 + *unicodeData = reinterpret_cast<char16_t*>
1.701 + (nsMemory::Alloc((outUnicodeLen + sizeof('\0')) *
1.702 + sizeof(char16_t)));
1.703 + if (*unicodeData) {
1.704 + memcpy(*unicodeData, data + sizeof(char16_t),
1.705 + outUnicodeLen * sizeof(char16_t));
1.706 + (*unicodeData)[outUnicodeLen] = '\0';
1.707 + }
1.708 + } else if (charset.EqualsLiteral("UNKNOWN")) {
1.709 + outUnicodeLen = 0;
1.710 + return;
1.711 + } else {
1.712 + // app which use "text/html" to copy&paste
1.713 + nsCOMPtr<nsIUnicodeDecoder> decoder;
1.714 + nsresult rv;
1.715 + // get the decoder
1.716 + nsCOMPtr<nsICharsetConverterManager> ccm =
1.717 + do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &rv);
1.718 + if (NS_FAILED(rv)) {
1.719 +#ifdef DEBUG_CLIPBOARD
1.720 + g_print(" can't get CHARSET CONVERTER MANAGER service\n");
1.721 +#endif
1.722 + outUnicodeLen = 0;
1.723 + return;
1.724 + }
1.725 + rv = ccm->GetUnicodeDecoder(charset.get(), getter_AddRefs(decoder));
1.726 + if (NS_FAILED(rv)) {
1.727 +#ifdef DEBUG_CLIPBOARD
1.728 + g_print(" get unicode decoder error\n");
1.729 +#endif
1.730 + outUnicodeLen = 0;
1.731 + return;
1.732 + }
1.733 + // converting
1.734 + decoder->GetMaxLength((const char *)data, dataLength, &outUnicodeLen);
1.735 + // |outUnicodeLen| is number of chars
1.736 + if (outUnicodeLen) {
1.737 + *unicodeData = reinterpret_cast<char16_t*>
1.738 + (nsMemory::Alloc((outUnicodeLen + sizeof('\0')) *
1.739 + sizeof(char16_t)));
1.740 + if (*unicodeData) {
1.741 + int32_t numberTmp = dataLength;
1.742 + decoder->Convert((const char *)data, &numberTmp,
1.743 + *unicodeData, &outUnicodeLen);
1.744 +#ifdef DEBUG_CLIPBOARD
1.745 + if (numberTmp != dataLength)
1.746 + printf("didn't consume all the bytes\n");
1.747 +#endif
1.748 + // null terminate. Convert() doesn't do it for us
1.749 + (*unicodeData)[outUnicodeLen] = '\0';
1.750 + }
1.751 + } // if valid length
1.752 + }
1.753 +}
1.754 +
1.755 +/*
1.756 + * get "charset" information from clipboard data
1.757 + * return value can be:
1.758 + * 1. "UTF-16": mozilla or "text/html" with "charset=utf-16"
1.759 + * 2. "UNKNOWN": mozilla can't detect what encode it use
1.760 + * 3. other: "text/html" with other charset than utf-16
1.761 + */
1.762 +void GetHTMLCharset(guchar * data, int32_t dataLength, nsCString& str)
1.763 +{
1.764 + // if detect "FFFE" or "FEFF", assume UTF-16
1.765 + char16_t* beginChar = (char16_t*)data;
1.766 + if ((beginChar[0] == 0xFFFE) || (beginChar[0] == 0xFEFF)) {
1.767 + str.AssignLiteral("UTF-16");
1.768 + return;
1.769 + }
1.770 + // no "FFFE" and "FEFF", assume ASCII first to find "charset" info
1.771 + const nsDependentCString htmlStr((const char *)data, dataLength);
1.772 + nsACString::const_iterator start, end;
1.773 + htmlStr.BeginReading(start);
1.774 + htmlStr.EndReading(end);
1.775 + nsACString::const_iterator valueStart(start), valueEnd(start);
1.776 +
1.777 + if (CaseInsensitiveFindInReadable(
1.778 + NS_LITERAL_CSTRING("CONTENT=\"text/html;"),
1.779 + start, end)) {
1.780 + start = end;
1.781 + htmlStr.EndReading(end);
1.782 +
1.783 + if (CaseInsensitiveFindInReadable(
1.784 + NS_LITERAL_CSTRING("charset="),
1.785 + start, end)) {
1.786 + valueStart = end;
1.787 + start = end;
1.788 + htmlStr.EndReading(end);
1.789 +
1.790 + if (FindCharInReadable('"', start, end))
1.791 + valueEnd = start;
1.792 + }
1.793 + }
1.794 + // find "charset" in HTML
1.795 + if (valueStart != valueEnd) {
1.796 + str = Substring(valueStart, valueEnd);
1.797 + ToUpperCase(str);
1.798 +#ifdef DEBUG_CLIPBOARD
1.799 + printf("Charset of HTML = %s\n", charsetUpperStr.get());
1.800 +#endif
1.801 + return;
1.802 + }
1.803 + str.AssignLiteral("UNKNOWN");
1.804 +}
1.805 +
1.806 +static void
1.807 +DispatchSelectionNotifyEvent(GtkWidget *widget, XEvent *xevent)
1.808 +{
1.809 + GdkEvent event;
1.810 + event.selection.type = GDK_SELECTION_NOTIFY;
1.811 + event.selection.window = gtk_widget_get_window(widget);
1.812 + event.selection.selection = gdk_x11_xatom_to_atom(xevent->xselection.selection);
1.813 + event.selection.target = gdk_x11_xatom_to_atom(xevent->xselection.target);
1.814 + event.selection.property = gdk_x11_xatom_to_atom(xevent->xselection.property);
1.815 + event.selection.time = xevent->xselection.time;
1.816 +
1.817 + gtk_widget_event(widget, &event);
1.818 +}
1.819 +
1.820 +static void
1.821 +DispatchPropertyNotifyEvent(GtkWidget *widget, XEvent *xevent)
1.822 +{
1.823 + GdkWindow *window = gtk_widget_get_window(widget);
1.824 + if ((gdk_window_get_events(window)) & GDK_PROPERTY_CHANGE_MASK) {
1.825 + GdkEvent event;
1.826 + event.property.type = GDK_PROPERTY_NOTIFY;
1.827 + event.property.window = window;
1.828 + event.property.atom = gdk_x11_xatom_to_atom(xevent->xproperty.atom);
1.829 + event.property.time = xevent->xproperty.time;
1.830 + event.property.state = xevent->xproperty.state;
1.831 +
1.832 + gtk_widget_event(widget, &event);
1.833 + }
1.834 +}
1.835 +
1.836 +struct checkEventContext
1.837 +{
1.838 + GtkWidget *cbWidget;
1.839 + Atom selAtom;
1.840 +};
1.841 +
1.842 +static Bool
1.843 +checkEventProc(Display *display, XEvent *event, XPointer arg)
1.844 +{
1.845 + checkEventContext *context = (checkEventContext *) arg;
1.846 +
1.847 + if (event->xany.type == SelectionNotify ||
1.848 + (event->xany.type == PropertyNotify &&
1.849 + event->xproperty.atom == context->selAtom)) {
1.850 +
1.851 + GdkWindow *cbWindow =
1.852 + gdk_x11_window_lookup_for_display(gdk_x11_lookup_xdisplay(display),
1.853 + event->xany.window);
1.854 + if (cbWindow) {
1.855 + GtkWidget *cbWidget = nullptr;
1.856 + gdk_window_get_user_data(cbWindow, (gpointer *)&cbWidget);
1.857 + if (cbWidget && GTK_IS_WIDGET(cbWidget)) {
1.858 + context->cbWidget = cbWidget;
1.859 + return True;
1.860 + }
1.861 + }
1.862 + }
1.863 +
1.864 + return False;
1.865 +}
1.866 +
1.867 +// Idle timeout for receiving selection and property notify events (microsec)
1.868 +static const int kClipboardTimeout = 500000;
1.869 +
1.870 +static gchar* CopyRetrievedData(const gchar *aData)
1.871 +{
1.872 + return g_strdup(aData);
1.873 +}
1.874 +
1.875 +static GtkSelectionData* CopyRetrievedData(GtkSelectionData *aData)
1.876 +{
1.877 + // A negative length indicates that retrieving the data failed.
1.878 + return gtk_selection_data_get_length(aData) >= 0 ?
1.879 + gtk_selection_data_copy(aData) : nullptr;
1.880 +}
1.881 +
1.882 +class RetrievalContext {
1.883 + ~RetrievalContext()
1.884 + {
1.885 + MOZ_ASSERT(!mData, "Wait() wasn't called");
1.886 + }
1.887 +
1.888 +public:
1.889 + NS_INLINE_DECL_REFCOUNTING(RetrievalContext)
1.890 + enum State { INITIAL, COMPLETED, TIMED_OUT };
1.891 +
1.892 + RetrievalContext() : mState(INITIAL), mData(nullptr) {}
1.893 +
1.894 + /**
1.895 + * Call this when data has been retrieved.
1.896 + */
1.897 + template <class T> void Complete(T *aData)
1.898 + {
1.899 + if (mState == INITIAL) {
1.900 + mState = COMPLETED;
1.901 + mData = CopyRetrievedData(aData);
1.902 + } else {
1.903 + // Already timed out
1.904 + MOZ_ASSERT(mState == TIMED_OUT);
1.905 + }
1.906 + }
1.907 +
1.908 + /**
1.909 + * Spins X event loop until timing out or being completed. Returns
1.910 + * null if we time out, otherwise returns the completed data (passing
1.911 + * ownership to caller).
1.912 + */
1.913 + void *Wait();
1.914 +
1.915 +protected:
1.916 + State mState;
1.917 + void* mData;
1.918 +};
1.919 +
1.920 +void *
1.921 +RetrievalContext::Wait()
1.922 +{
1.923 + if (mState == COMPLETED) { // the request completed synchronously
1.924 + void *data = mData;
1.925 + mData = nullptr;
1.926 + return data;
1.927 + }
1.928 +
1.929 + Display *xDisplay = GDK_DISPLAY_XDISPLAY(gdk_display_get_default()) ;
1.930 + checkEventContext context;
1.931 + context.cbWidget = nullptr;
1.932 + context.selAtom = gdk_x11_atom_to_xatom(gdk_atom_intern("GDK_SELECTION",
1.933 + FALSE));
1.934 +
1.935 + // Send X events which are relevant to the ongoing selection retrieval
1.936 + // to the clipboard widget. Wait until either the operation completes, or
1.937 + // we hit our timeout. All other X events remain queued.
1.938 +
1.939 + int select_result;
1.940 +
1.941 + int cnumber = ConnectionNumber(xDisplay);
1.942 + fd_set select_set;
1.943 + FD_ZERO(&select_set);
1.944 + FD_SET(cnumber, &select_set);
1.945 + ++cnumber;
1.946 + TimeStamp start = TimeStamp::Now();
1.947 +
1.948 + do {
1.949 + XEvent xevent;
1.950 +
1.951 + while (XCheckIfEvent(xDisplay, &xevent, checkEventProc,
1.952 + (XPointer) &context)) {
1.953 +
1.954 + if (xevent.xany.type == SelectionNotify)
1.955 + DispatchSelectionNotifyEvent(context.cbWidget, &xevent);
1.956 + else
1.957 + DispatchPropertyNotifyEvent(context.cbWidget, &xevent);
1.958 +
1.959 + if (mState == COMPLETED) {
1.960 + void *data = mData;
1.961 + mData = nullptr;
1.962 + return data;
1.963 + }
1.964 + }
1.965 +
1.966 + TimeStamp now = TimeStamp::Now();
1.967 + struct timeval tv;
1.968 + tv.tv_sec = 0;
1.969 + tv.tv_usec = std::max<int32_t>(0,
1.970 + kClipboardTimeout - (now - start).ToMicroseconds());
1.971 + select_result = select(cnumber, &select_set, nullptr, nullptr, &tv);
1.972 + } while (select_result == 1 ||
1.973 + (select_result == -1 && errno == EINTR));
1.974 +
1.975 +#ifdef DEBUG_CLIPBOARD
1.976 + printf("exceeded clipboard timeout\n");
1.977 +#endif
1.978 + mState = TIMED_OUT;
1.979 + return nullptr;
1.980 +}
1.981 +
1.982 +static void
1.983 +clipboard_contents_received(GtkClipboard *clipboard,
1.984 + GtkSelectionData *selection_data,
1.985 + gpointer data)
1.986 +{
1.987 + RetrievalContext *context = static_cast<RetrievalContext*>(data);
1.988 + context->Complete(selection_data);
1.989 + context->Release();
1.990 +}
1.991 +
1.992 +static GtkSelectionData *
1.993 +wait_for_contents(GtkClipboard *clipboard, GdkAtom target)
1.994 +{
1.995 + RefPtr<RetrievalContext> context = new RetrievalContext();
1.996 + // Balanced by Release in clipboard_contents_received
1.997 + context->AddRef();
1.998 + gtk_clipboard_request_contents(clipboard, target,
1.999 + clipboard_contents_received,
1.1000 + context.get());
1.1001 + return static_cast<GtkSelectionData*>(context->Wait());
1.1002 +}
1.1003 +
1.1004 +static void
1.1005 +clipboard_text_received(GtkClipboard *clipboard,
1.1006 + const gchar *text,
1.1007 + gpointer data)
1.1008 +{
1.1009 + RetrievalContext *context = static_cast<RetrievalContext*>(data);
1.1010 + context->Complete(text);
1.1011 + context->Release();
1.1012 +}
1.1013 +
1.1014 +static gchar *
1.1015 +wait_for_text(GtkClipboard *clipboard)
1.1016 +{
1.1017 + RefPtr<RetrievalContext> context = new RetrievalContext();
1.1018 + // Balanced by Release in clipboard_text_received
1.1019 + context->AddRef();
1.1020 + gtk_clipboard_request_text(clipboard, clipboard_text_received, context.get());
1.1021 + return static_cast<gchar*>(context->Wait());
1.1022 +}
