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Diffstat (limited to '')
| -rw-r--r-- | widget/gtk/nsClipboard.cpp | 822 |
1 files changed, 822 insertions, 0 deletions
diff --git a/widget/gtk/nsClipboard.cpp b/widget/gtk/nsClipboard.cpp new file mode 100644 index 0000000000..42807845fb --- /dev/null +++ b/widget/gtk/nsClipboard.cpp @@ -0,0 +1,822 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:expandtab:shiftwidth=4:tabstop=4: + */ +/* 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 "nsContentUtils.h" +#include "HeadlessClipboard.h" +#include "nsSupportsPrimitives.h" +#include "nsString.h" +#include "nsReadableUtils.h" +#include "nsPrimitiveHelpers.h" +#include "nsImageToPixbuf.h" +#include "nsStringStream.h" +#include "nsIObserverService.h" +#include "mozilla/Services.h" +#include "mozilla/RefPtr.h" +#include "mozilla/SchedulerGroup.h" +#include "mozilla/TimeStamp.h" +#include "gfxPlatformGtk.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) +const int kClipboardTimeout = 500000; + +// 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">)"; + +// 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(const char* data, int32_t dataLength, + nsCString& charset, char16_t** unicodeData, + int32_t& outUnicodeLen); + +static bool GetHTMLCharset(const char* data, int32_t dataLength, + nsCString& str); + +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; + else + 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 (gfxPlatformGtk::GetPlatform()->IsX11Display()) { + mContext = MakeUnique<nsRetrievalContextX11>(); +#if defined(MOZ_WAYLAND) + } else { + mContext = MakeUnique<nsRetrievalContextWayland>(); +#endif + } + NS_ASSERTION(mContext, "Missing nsRetrievalContext for nsClipboard!"); + + 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()", []() { + 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]; + + // Special case text/unicode since we can handle all of the string types. + if (flavorStr.EqualsLiteral(kUnicodeMime)) { + LOGCLIP((" 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((" image targets\n")); + gtk_target_list_add_image_targets(list, 0, TRUE); + imagesAdded = true; + } + continue; + } + + // Add this to our list of valid targets + 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; + GtkTargetEntry* gtkTargets = + gtk_target_table_new_from_list(list, &numTargets); + + LOGCLIP((" gtk_target_table_new_from_list() = %p\n", (void*)gtkTargets)); + + // Set getcallback and request to store data after an application exit + if (gtkTargets && + gtk_clipboard_set_with_data(gtkClipboard, gtkTargets, numTargets, + clipboard_get_cb, clipboard_clear_cb, this)) { + LOGCLIP((" gtk_clipboard_set_with_data() is ok\n")); + // 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")); + // Clear references to the any old data and let GTK know that it is no + // longer available. + 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); +} + +NS_IMETHODIMP +nsClipboard::GetData(nsITransferable* aTransferable, int32_t aWhichClipboard) { + if (!aTransferable) return NS_ERROR_FAILURE; + + LOGCLIP(("nsClipboard::GetData (%s)\n", + aWhichClipboard == kSelectionClipboard ? "primary" : "clipboard")); + + // 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:\n")); + for (uint32_t i = 0; i < flavors.Length(); i++) { + LOGCLIP((" %s\n", flavors[i].get())); + } +#endif + + 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())); + + uint32_t clipboardDataLength; + const char* clipboardData = mContext->GetClipboardData( + flavorStr.get(), aWhichClipboard, &clipboardDataLength); + if (!clipboardData) { + LOGCLIP((" %s type is missing\n", flavorStr.get())); + continue; + } + + nsCOMPtr<nsIInputStream> byteStream; + NS_NewByteInputStream(getter_AddRefs(byteStream), + Span(clipboardData, clipboardDataLength), + NS_ASSIGNMENT_COPY); + aTransferable->SetTransferData(flavorStr.get(), byteStream); + LOGCLIP((" got %s MIME data\n", flavorStr.get())); + + mContext->ReleaseClipboardData(clipboardData); + 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())); + + const char* 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); + const char* unicodeData = (const char*)ToNewUnicode(ucs2string); + uint32_t unicodeDataLength = ucs2string.Length() * 2; + SetTransferableData(aTransferable, flavorStr, unicodeData, + unicodeDataLength); + free((void*)unicodeData); + + LOGCLIP((" got unicode data, length %d\n", ucs2string.Length())); + + mContext->ReleaseClipboardData(clipboardData); + return NS_OK; + } + + LOGCLIP((" Getting %s MIME clipboard data\n", flavorStr.get())); + + uint32_t clipboardDataLength; + const char* clipboardData = mContext->GetClipboardData( + flavorStr.get(), aWhichClipboard, &clipboardDataLength); + +#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, clipboardDataLength, 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, clipboardDataLength, charset, + &htmlBody, htmlBodyLen)) { + LOGCLIP((" failed to convert text/html to UCS2.\n")); + mContext->ReleaseClipboardData(clipboardData); + continue; + } + + SetTransferableData(aTransferable, flavorStr, (const char*)htmlBody, + htmlBodyLen * 2); + free(htmlBody); + } else { + SetTransferableData(aTransferable, flavorStr, clipboardData, + clipboardDataLength); + } + + mContext->ReleaseClipboardData(clipboardData); + 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; + + int targetNums; + GdkAtom* targets = mContext->GetTargets(aWhichClipboard, &targetNums); + if (!targets) { + LOGCLIP((" no targes at clipboard (null)\n")); + return NS_OK; + } + + // 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, targetNums)) { + *_retval = true; + LOGCLIP((" has kUnicodeMime\n")); + break; + } + + for (int32_t j = 0; j < targetNums; j++) { + gchar* atom_name = gdk_atom_name(targets[j]); + if (!atom_name) continue; + + if (flavor.Equals(atom_name)) { + *_retval = true; + LOGCLIP((" has %s\n", atom_name)); + } + // X clipboard supports image/jpeg, but we want to emulate support + // for image/jpg as well + else if (flavor.EqualsLiteral(kJPGImageMime) && + !strcmp(atom_name, kJPEGImageMime)) { + *_retval = true; + LOGCLIP((" has image/jpg\n")); + } + + g_free(atom_name); + + if (*_retval) break; + } + } + +#ifdef MOZ_LOGGING + if (!(*_retval)) { + LOGCLIP((" no targes at clipboard (bad match)\n")); + } +#endif + + g_free(targets); + return NS_OK; +} + +NS_IMETHODIMP +nsClipboard::SupportsSelectionClipboard(bool* _retval) { + *_retval = mContext->HasSelectionSupport(); + 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", gdk_atom_name(selectionTarget))); + + // 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 %d 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", + gdk_atom_name(selectionTarget))); + 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 %d bytest of %s data\n", html.Length(), + gdk_atom_name(selectionTarget))); + 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", + gdk_atom_name(selectionTarget))); + + // Try to match up the selection data target to something our + // transferable provides. + gchar* target_name = gdk_atom_name(selectionTarget); + if (!target_name) { + LOGCLIP((" Failed to get target name!\n")); + return; + } + + rv = trans->GetTransferData(target_name, getter_AddRefs(item)); + // nothing found? + if (NS_FAILED(rv) || !item) { + LOGCLIP((" Failed to get anything from GetTransferData()!\n")); + g_free(target_name); + return; + } + + void* primitive_data = nullptr; + uint32_t dataLen = 0; + nsPrimitiveHelpers::CreateDataFromPrimitive(nsDependentCString(target_name), + item, &primitive_data, &dataLen); + + if (primitive_data) { + LOGCLIP((" Setting %s as a primitive data type, %d bytes\n", target_name, + dataLen)); + gtk_selection_data_set(aSelectionData, selectionTarget, + 8, /* 8 bits in a unit */ + (const guchar*)primitive_data, dataLen); + free(primitive_data); + } else { + LOGCLIP((" Failed to get primitive data!\n")); + } + + g_free(target_name); +} + +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(const char* data, int32_t dataLength, nsCString& charset, + char16_t** unicodeData, int32_t& outUnicodeLen) { + if (charset.EqualsLiteral("UTF-16")) { // current mozilla + outUnicodeLen = (dataLength / 2) - 1; + *unicodeData = reinterpret_cast<char16_t*>( + moz_xmalloc((outUnicodeLen + sizeof('\0')) * sizeof(char16_t))); + memcpy(*unicodeData, data + sizeof(char16_t), + outUnicodeLen * sizeof(char16_t)); + (*unicodeData)[outUnicodeLen] = '\0'; + return true; + } else if (charset.EqualsLiteral("UNKNOWN")) { + outUnicodeLen = 0; + return false; + } else { + // 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; + } + + auto dataSpan = Span(data, dataLength); + // Remove kHTMLMarkupPrefix again, it won't necessarily cause any + // issues, but might confuse other users. + const size_t prefixLen = ArrayLength(kHTMLMarkupPrefix) - 1; + if (dataSpan.Length() >= prefixLen && + Substring(data, prefixLen).EqualsLiteral(kHTMLMarkupPrefix)) { + dataSpan = dataSpan.From(prefixLen); + } + + auto decoder = encoding->NewDecoder(); + CheckedInt<size_t> needed = + decoder->MaxUTF16BufferLength(dataSpan.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; + bool hadErrors; + Tie(result, read, written, hadErrors) = decoder->DecodeToUTF16( + AsBytes(dataSpan), Span(*unicodeData, needed.value()), true); + MOZ_ASSERT(result == kInputEmpty); + MOZ_ASSERT(read == size_t(dataSpan.Length())); + MOZ_ASSERT(written <= needed.value()); + Unused << hadErrors; + 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(const char* data, int32_t dataLength, nsCString& str) { + // if detect "FFFE" or "FEFF", assume UTF-16 + char16_t* beginChar = (char16_t*)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(data, dataLength); + 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; +} |