diff options
Diffstat (limited to 'image/decoders/icon/gtk/nsIconChannel.cpp')
| -rw-r--r-- | image/decoders/icon/gtk/nsIconChannel.cpp | 483 |
1 files changed, 483 insertions, 0 deletions
diff --git a/image/decoders/icon/gtk/nsIconChannel.cpp b/image/decoders/icon/gtk/nsIconChannel.cpp new file mode 100644 index 0000000000..2b8b958b9e --- /dev/null +++ b/image/decoders/icon/gtk/nsIconChannel.cpp @@ -0,0 +1,483 @@ +/* vim:set ts=2 sw=2 sts=2 cin et: */ +/* 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 "nsIconChannel.h" + +#include <stdlib.h> +#include <unistd.h> + +#include "mozilla/DebugOnly.h" +#include "mozilla/EndianUtils.h" +#include "mozilla/NullPrincipal.h" +#include "mozilla/CheckedInt.h" +#include "mozilla/dom/ContentChild.h" +#include "mozilla/gfx/Swizzle.h" +#include "mozilla/ipc/ByteBuf.h" +#include <algorithm> + +#include <gio/gio.h> + +#include <gtk/gtk.h> + +#include "nsMimeTypes.h" +#include "nsIMIMEService.h" + +#include "nsServiceManagerUtils.h" + +#include "nsNetUtil.h" +#include "nsComponentManagerUtils.h" +#include "nsIStringStream.h" +#include "nsServiceManagerUtils.h" +#include "nsIURL.h" +#include "nsIPipe.h" +#include "nsIAsyncInputStream.h" +#include "nsIAsyncOutputStream.h" +#include "prlink.h" +#include "gfxPlatform.h" + +using mozilla::CheckedInt32; +using mozilla::ipc::ByteBuf; + +NS_IMPL_ISUPPORTS(nsIconChannel, nsIRequest, nsIChannel) + +static nsresult MozGdkPixbufToByteBuf(GdkPixbuf* aPixbuf, ByteBuf* aByteBuf) { + int width = gdk_pixbuf_get_width(aPixbuf); + int height = gdk_pixbuf_get_height(aPixbuf); + NS_ENSURE_TRUE(height < 256 && width < 256 && height > 0 && width > 0 && + gdk_pixbuf_get_colorspace(aPixbuf) == GDK_COLORSPACE_RGB && + gdk_pixbuf_get_bits_per_sample(aPixbuf) == 8 && + gdk_pixbuf_get_has_alpha(aPixbuf) && + gdk_pixbuf_get_n_channels(aPixbuf) == 4, + NS_ERROR_UNEXPECTED); + + const int n_channels = 4; + CheckedInt32 buf_size = + 4 + n_channels * CheckedInt32(height) * CheckedInt32(width); + if (!buf_size.isValid()) { + return NS_ERROR_OUT_OF_MEMORY; + } + uint8_t* const buf = (uint8_t*)moz_xmalloc(buf_size.value()); + uint8_t* out = buf; + + *(out++) = width; + *(out++) = height; + *(out++) = uint8_t(mozilla::gfx::SurfaceFormat::OS_RGBA); + + // Set all bits to ensure in nsIconDecoder we color manage and premultiply. + *(out++) = 0xFF; + + const guchar* const pixels = gdk_pixbuf_get_pixels(aPixbuf); + int instride = gdk_pixbuf_get_rowstride(aPixbuf); + int outstride = width * n_channels; + + // encode the RGB data and the A data and adjust the stride as necessary. + mozilla::gfx::SwizzleData(pixels, instride, + mozilla::gfx::SurfaceFormat::R8G8B8A8, out, + outstride, mozilla::gfx::SurfaceFormat::OS_RGBA, + mozilla::gfx::IntSize(width, height)); + + *aByteBuf = ByteBuf(buf, buf_size.value(), buf_size.value()); + return NS_OK; +} + +static nsresult ByteBufToStream(ByteBuf&& aBuf, nsIInputStream** aStream) { + nsresult rv; + nsCOMPtr<nsIStringInputStream> stream = + do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv); + + if (NS_WARN_IF(NS_FAILED(rv))) { + return rv; + } + + // stream takes ownership of buf and will free it on destruction. + // This function cannot fail. + rv = stream->AdoptData(reinterpret_cast<char*>(aBuf.mData), aBuf.mLen); + MOZ_ASSERT(CheckedInt32(aBuf.mLen).isValid(), + "aBuf.mLen should fit in int32_t"); + aBuf.mData = nullptr; + + // If this no longer holds then re-examine buf's lifetime. + MOZ_ASSERT(NS_SUCCEEDED(rv)); + NS_ENSURE_SUCCESS(rv, rv); + + stream.forget(aStream); + return NS_OK; +} + +static nsresult StreamToChannel(already_AddRefed<nsIInputStream> aStream, + nsIURI* aURI, nsIChannel** aChannel) { + // nsIconProtocolHandler::NewChannel will provide the correct loadInfo for + // this iconChannel. Use the most restrictive security settings for the + // temporary loadInfo to make sure the channel can not be opened. + nsCOMPtr<nsIPrincipal> nullPrincipal = + mozilla::NullPrincipal::CreateWithoutOriginAttributes(); + return NS_NewInputStreamChannel( + aChannel, aURI, std::move(aStream), nullPrincipal, + nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED, + nsIContentPolicy::TYPE_INTERNAL_IMAGE, nsLiteralCString(IMAGE_ICON_MS)); +} + +static GtkWidget* gProtoWindow = nullptr; +static GtkWidget* gStockImageWidget = nullptr; + +static void ensure_stock_image_widget() { + // Only the style of the GtkImage needs to be used, but the widget is kept + // to track dynamic style changes. + if (!gProtoWindow) { + gProtoWindow = gtk_window_new(GTK_WINDOW_POPUP); + GtkWidget* protoLayout = gtk_fixed_new(); + gtk_container_add(GTK_CONTAINER(gProtoWindow), protoLayout); + + gStockImageWidget = gtk_image_new(); + gtk_container_add(GTK_CONTAINER(protoLayout), gStockImageWidget); + + gtk_widget_ensure_style(gStockImageWidget); + } +} + +static GtkIconSize moz_gtk_icon_size(const char* name) { + if (strcmp(name, "button") == 0) { + return GTK_ICON_SIZE_BUTTON; + } + + if (strcmp(name, "menu") == 0) { + return GTK_ICON_SIZE_MENU; + } + + if (strcmp(name, "toolbar") == 0) { + return GTK_ICON_SIZE_LARGE_TOOLBAR; + } + + if (strcmp(name, "toolbarsmall") == 0) { + return GTK_ICON_SIZE_SMALL_TOOLBAR; + } + + if (strcmp(name, "dnd") == 0) { + return GTK_ICON_SIZE_DND; + } + + if (strcmp(name, "dialog") == 0) { + return GTK_ICON_SIZE_DIALOG; + } + + return GTK_ICON_SIZE_MENU; +} + +static int32_t GetIconSize(nsIMozIconURI* aIconURI) { + nsAutoCString iconSizeString; + + aIconURI->GetIconSize(iconSizeString); + if (iconSizeString.IsEmpty()) { + uint32_t size; + mozilla::DebugOnly<nsresult> rv = aIconURI->GetImageSize(&size); + NS_ASSERTION(NS_SUCCEEDED(rv), "GetImageSize failed"); + return size; + } + int size; + + GtkIconSize icon_size = moz_gtk_icon_size(iconSizeString.get()); + gtk_icon_size_lookup(icon_size, &size, nullptr); + return size; +} + +/* Scale icon buffer to preferred size */ +static nsresult ScaleIconBuf(GdkPixbuf** aBuf, int32_t iconSize) { + // Scale buffer only if width or height differ from preferred size + if (gdk_pixbuf_get_width(*aBuf) != iconSize && + gdk_pixbuf_get_height(*aBuf) != iconSize) { + GdkPixbuf* scaled = + gdk_pixbuf_scale_simple(*aBuf, iconSize, iconSize, GDK_INTERP_BILINEAR); + // replace original buffer by scaled + g_object_unref(*aBuf); + *aBuf = scaled; + if (!scaled) { + return NS_ERROR_OUT_OF_MEMORY; + } + } + return NS_OK; +} + +/* static */ +nsresult nsIconChannel::GetIconWithGIO(nsIMozIconURI* aIconURI, + ByteBuf* aDataOut) { + GIcon* icon = nullptr; + nsCOMPtr<nsIURL> fileURI; + + // Read icon content + aIconURI->GetIconURL(getter_AddRefs(fileURI)); + + // Get icon for file specified by URI + if (fileURI) { + nsAutoCString spec; + fileURI->GetAsciiSpec(spec); + if (fileURI->SchemeIs("file")) { + GFile* file = g_file_new_for_uri(spec.get()); + GFileInfo* fileInfo = + g_file_query_info(file, G_FILE_ATTRIBUTE_STANDARD_ICON, + G_FILE_QUERY_INFO_NONE, nullptr, nullptr); + g_object_unref(file); + if (fileInfo) { + // icon from g_content_type_get_icon doesn't need unref + icon = g_file_info_get_icon(fileInfo); + if (icon) { + g_object_ref(icon); + } + g_object_unref(fileInfo); + } + } + } + + // Try to get icon by using MIME type + if (!icon) { + nsAutoCString type; + aIconURI->GetContentType(type); + // Try to get MIME type from file extension by using nsIMIMEService + if (type.IsEmpty()) { + nsCOMPtr<nsIMIMEService> ms(do_GetService("@mozilla.org/mime;1")); + if (ms) { + nsAutoCString fileExt; + aIconURI->GetFileExtension(fileExt); + ms->GetTypeFromExtension(fileExt, type); + } + } + char* ctype = nullptr; // character representation of content type + if (!type.IsEmpty()) { + ctype = g_content_type_from_mime_type(type.get()); + } + if (ctype) { + icon = g_content_type_get_icon(ctype); + g_free(ctype); + } + } + + // Get default icon theme + GtkIconTheme* iconTheme = gtk_icon_theme_get_default(); + GtkIconInfo* iconInfo = nullptr; + // Get icon size + int32_t iconSize = GetIconSize(aIconURI); + + if (icon) { + // Use icon and theme to get GtkIconInfo + iconInfo = gtk_icon_theme_lookup_by_gicon(iconTheme, icon, iconSize, + (GtkIconLookupFlags)0); + g_object_unref(icon); + } + + if (!iconInfo) { + // Mozilla's mimetype lookup failed. Try the "unknown" icon. + iconInfo = gtk_icon_theme_lookup_icon(iconTheme, "unknown", iconSize, + (GtkIconLookupFlags)0); + if (!iconInfo) { + return NS_ERROR_NOT_AVAILABLE; + } + } + + // Create a GdkPixbuf buffer containing icon and scale it + GdkPixbuf* buf = gtk_icon_info_load_icon(iconInfo, nullptr); + gtk_icon_info_free(iconInfo); + if (!buf) { + return NS_ERROR_UNEXPECTED; + } + + nsresult rv = ScaleIconBuf(&buf, iconSize); + NS_ENSURE_SUCCESS(rv, rv); + + rv = MozGdkPixbufToByteBuf(buf, aDataOut); + g_object_unref(buf); + return rv; +} + +/* static */ +nsresult nsIconChannel::GetIcon(nsIURI* aURI, ByteBuf* aDataOut) { + nsCOMPtr<nsIMozIconURI> iconURI = do_QueryInterface(aURI); + NS_ASSERTION(iconURI, "URI is not an nsIMozIconURI"); + + if (!iconURI) { + return NS_ERROR_NOT_AVAILABLE; + } + + if (gfxPlatform::IsHeadless()) { + return NS_ERROR_NOT_AVAILABLE; + } + + nsAutoCString stockIcon; + iconURI->GetStockIcon(stockIcon); + if (stockIcon.IsEmpty()) { + return GetIconWithGIO(iconURI, aDataOut); + } + + // Search for stockIcon + nsAutoCString iconSizeString; + iconURI->GetIconSize(iconSizeString); + + nsAutoCString iconStateString; + iconURI->GetIconState(iconStateString); + + GtkIconSize icon_size = moz_gtk_icon_size(iconSizeString.get()); + GtkStateType state = iconStateString.EqualsLiteral("disabled") + ? GTK_STATE_INSENSITIVE + : GTK_STATE_NORMAL; + + // First lookup the icon by stock id and text direction. + GtkTextDirection direction = GTK_TEXT_DIR_NONE; + if (StringEndsWith(stockIcon, "-ltr"_ns)) { + direction = GTK_TEXT_DIR_LTR; + } else if (StringEndsWith(stockIcon, "-rtl"_ns)) { + direction = GTK_TEXT_DIR_RTL; + } + + bool forceDirection = direction != GTK_TEXT_DIR_NONE; + nsAutoCString stockID; + bool useIconName = false; + if (!forceDirection) { + direction = gtk_widget_get_default_direction(); + stockID = stockIcon; + } else { + // GTK versions < 2.22 use icon names from concatenating stock id with + // -(rtl|ltr), which is how the moz-icon stock name is interpreted here. + stockID = Substring(stockIcon, 0, stockIcon.Length() - 4); + // However, if we lookup bidi icons by the stock name, then GTK versions + // >= 2.22 will use a bidi lookup convention that most icon themes do not + // yet follow. Therefore, we first check to see if the theme supports the + // old icon name as this will have bidi support (if found). + GtkIconTheme* icon_theme = gtk_icon_theme_get_default(); + // Micking what gtk_icon_set_render_icon does with sizes, though it's not + // critical as icons will be scaled to suit size. It just means we follow + // the same paths and so share caches. + gint width, height; + if (gtk_icon_size_lookup(icon_size, &width, &height)) { + gint size = std::min(width, height); + // We use gtk_icon_theme_lookup_icon() without + // GTK_ICON_LOOKUP_USE_BUILTIN instead of gtk_icon_theme_has_icon() so + // we don't pick up fallback icons added by distributions for backward + // compatibility. + GtkIconInfo* icon = gtk_icon_theme_lookup_icon( + icon_theme, stockIcon.get(), size, (GtkIconLookupFlags)0); + if (icon) { + useIconName = true; + gtk_icon_info_free(icon); + } + } + } + + ensure_stock_image_widget(); + GtkStyle* style = gtk_widget_get_style(gStockImageWidget); + GtkIconSet* icon_set = nullptr; + if (!useIconName) { + icon_set = gtk_style_lookup_icon_set(style, stockID.get()); + } + + if (!icon_set) { + // Either we have chosen icon-name lookup for a bidi icon, or stockIcon is + // not a stock id so we assume it is an icon name. + useIconName = true; + // Creating a GtkIconSet is a convenient way to allow the style to + // render the icon, possibly with variations suitable for insensitive + // states. + icon_set = gtk_icon_set_new(); + GtkIconSource* icon_source = gtk_icon_source_new(); + + gtk_icon_source_set_icon_name(icon_source, stockIcon.get()); + gtk_icon_set_add_source(icon_set, icon_source); + gtk_icon_source_free(icon_source); + } + + GdkPixbuf* icon = gtk_icon_set_render_icon( + icon_set, style, direction, state, icon_size, gStockImageWidget, nullptr); + if (useIconName) { + gtk_icon_set_unref(icon_set); + } + + // According to documentation, gtk_icon_set_render_icon() never returns + // nullptr, but it does return nullptr when we have the problem reported + // here: https://bugzilla.gnome.org/show_bug.cgi?id=629878#c13 + if (!icon) { + return NS_ERROR_NOT_AVAILABLE; + } + + nsresult rv = MozGdkPixbufToByteBuf(icon, aDataOut); + + g_object_unref(icon); + + return rv; +} + +nsresult nsIconChannel::Init(nsIURI* aURI) { + nsCOMPtr<nsIInputStream> stream; + + using ContentChild = mozilla::dom::ContentChild; + if (auto* contentChild = ContentChild::GetSingleton()) { + // Get the icon via IPC and translate the promise of a ByteBuf + // into an actually-existing channel. + RefPtr<ContentChild::GetSystemIconPromise> icon = + contentChild->SendGetSystemIcon(aURI); + if (!icon) { + return NS_ERROR_UNEXPECTED; + } + + nsCOMPtr<nsIAsyncInputStream> inputStream; + nsCOMPtr<nsIAsyncOutputStream> outputStream; + NS_NewPipe2(getter_AddRefs(inputStream), getter_AddRefs(outputStream), true, + false, 0, UINT32_MAX); + + // FIXME: Bug 1718324 + // The GetSystemIcon() call will end up on the parent doing GetIcon() + // and by using ByteBuf we might not be immune to some deadlock, at least + // on paper. From analysis in + // https://phabricator.services.mozilla.com/D118596#3865440 we should be + // safe in practice, but it would be nicer to just write that differently. + + icon->Then( + mozilla::GetCurrentSerialEventTarget(), __func__, + [outputStream](std::tuple<nsresult, mozilla::Maybe<ByteBuf>>&& aArg) { + nsresult rv = std::get<0>(aArg); + mozilla::Maybe<ByteBuf> bytes = std::move(std::get<1>(aArg)); + + if (NS_SUCCEEDED(rv)) { + MOZ_RELEASE_ASSERT(bytes); + uint32_t written; + rv = outputStream->Write(reinterpret_cast<char*>(bytes->mData), + static_cast<uint32_t>(bytes->mLen), + &written); + if (NS_SUCCEEDED(rv)) { + const bool wroteAll = static_cast<size_t>(written) == bytes->mLen; + MOZ_ASSERT(wroteAll); + if (!wroteAll) { + rv = NS_ERROR_UNEXPECTED; + } + } + } else { + MOZ_ASSERT(!bytes); + } + + if (NS_FAILED(rv)) { + outputStream->CloseWithStatus(rv); + } + }, + [outputStream](mozilla::ipc::ResponseRejectReason) { + outputStream->CloseWithStatus(NS_ERROR_FAILURE); + }); + + stream = inputStream.forget(); + } else { + // Get the icon directly. + ByteBuf bytebuf; + nsresult rv = GetIcon(aURI, &bytebuf); + NS_ENSURE_SUCCESS(rv, rv); + + rv = ByteBufToStream(std::move(bytebuf), getter_AddRefs(stream)); + NS_ENSURE_SUCCESS(rv, rv); + } + + return StreamToChannel(stream.forget(), aURI, getter_AddRefs(mRealChannel)); +} + +void nsIconChannel::Shutdown() { + if (gProtoWindow) { + gtk_widget_destroy(gProtoWindow); + gProtoWindow = nullptr; + gStockImageWidget = nullptr; + } +} |