483 lines
15 KiB
C++
483 lines
15 KiB
C++
/* vim:set ts=2 sw=2 sts=2 cin et: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsIconChannel.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include "mozilla/DebugOnly.h"
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#include "mozilla/EndianUtils.h"
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#include "mozilla/NullPrincipal.h"
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#include "mozilla/CheckedInt.h"
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#include "mozilla/dom/ContentChild.h"
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#include "mozilla/gfx/Swizzle.h"
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#include "mozilla/ipc/ByteBuf.h"
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#include <algorithm>
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#include <gio/gio.h>
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#include <gtk/gtk.h>
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#include "nsMimeTypes.h"
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#include "nsIMIMEService.h"
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#include "nsServiceManagerUtils.h"
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#include "nsNetUtil.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIStringStream.h"
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#include "nsServiceManagerUtils.h"
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#include "nsIURL.h"
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#include "nsIPipe.h"
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#include "nsIAsyncInputStream.h"
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#include "nsIAsyncOutputStream.h"
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#include "prlink.h"
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#include "gfxPlatform.h"
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using mozilla::CheckedInt32;
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using mozilla::ipc::ByteBuf;
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NS_IMPL_ISUPPORTS(nsIconChannel, nsIRequest, nsIChannel)
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static nsresult MozGdkPixbufToByteBuf(GdkPixbuf* aPixbuf, ByteBuf* aByteBuf) {
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int width = gdk_pixbuf_get_width(aPixbuf);
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int height = gdk_pixbuf_get_height(aPixbuf);
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NS_ENSURE_TRUE(height < 256 && width < 256 && height > 0 && width > 0 &&
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gdk_pixbuf_get_colorspace(aPixbuf) == GDK_COLORSPACE_RGB &&
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gdk_pixbuf_get_bits_per_sample(aPixbuf) == 8 &&
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gdk_pixbuf_get_has_alpha(aPixbuf) &&
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gdk_pixbuf_get_n_channels(aPixbuf) == 4,
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NS_ERROR_UNEXPECTED);
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const int n_channels = 4;
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CheckedInt32 buf_size =
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4 + n_channels * CheckedInt32(height) * CheckedInt32(width);
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if (!buf_size.isValid()) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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uint8_t* const buf = (uint8_t*)moz_xmalloc(buf_size.value());
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uint8_t* out = buf;
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*(out++) = width;
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*(out++) = height;
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*(out++) = uint8_t(mozilla::gfx::SurfaceFormat::OS_RGBA);
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// Set all bits to ensure in nsIconDecoder we color manage and premultiply.
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*(out++) = 0xFF;
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const guchar* const pixels = gdk_pixbuf_get_pixels(aPixbuf);
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int instride = gdk_pixbuf_get_rowstride(aPixbuf);
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int outstride = width * n_channels;
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// encode the RGB data and the A data and adjust the stride as necessary.
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mozilla::gfx::SwizzleData(pixels, instride,
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mozilla::gfx::SurfaceFormat::R8G8B8A8, out,
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outstride, mozilla::gfx::SurfaceFormat::OS_RGBA,
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mozilla::gfx::IntSize(width, height));
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*aByteBuf = ByteBuf(buf, buf_size.value(), buf_size.value());
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return NS_OK;
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}
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static nsresult ByteBufToStream(ByteBuf&& aBuf, nsIInputStream** aStream) {
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nsresult rv;
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nsCOMPtr<nsIStringInputStream> stream =
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do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return rv;
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}
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// stream takes ownership of buf and will free it on destruction.
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// This function cannot fail.
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rv = stream->AdoptData(reinterpret_cast<char*>(aBuf.mData), aBuf.mLen);
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MOZ_ASSERT(CheckedInt32(aBuf.mLen).isValid(),
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"aBuf.mLen should fit in int32_t");
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aBuf.mData = nullptr;
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// If this no longer holds then re-examine buf's lifetime.
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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NS_ENSURE_SUCCESS(rv, rv);
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stream.forget(aStream);
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return NS_OK;
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}
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static nsresult StreamToChannel(already_AddRefed<nsIInputStream> aStream,
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nsIURI* aURI, nsIChannel** aChannel) {
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// nsIconProtocolHandler::NewChannel will provide the correct loadInfo for
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// this iconChannel. Use the most restrictive security settings for the
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// temporary loadInfo to make sure the channel can not be opened.
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nsCOMPtr<nsIPrincipal> nullPrincipal =
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mozilla::NullPrincipal::CreateWithoutOriginAttributes();
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return NS_NewInputStreamChannel(
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aChannel, aURI, std::move(aStream), nullPrincipal,
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nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED,
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nsIContentPolicy::TYPE_INTERNAL_IMAGE, nsLiteralCString(IMAGE_ICON_MS));
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}
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static GtkWidget* gProtoWindow = nullptr;
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static GtkWidget* gStockImageWidget = nullptr;
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static void ensure_stock_image_widget() {
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// Only the style of the GtkImage needs to be used, but the widget is kept
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// to track dynamic style changes.
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if (!gProtoWindow) {
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gProtoWindow = gtk_window_new(GTK_WINDOW_POPUP);
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GtkWidget* protoLayout = gtk_fixed_new();
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gtk_container_add(GTK_CONTAINER(gProtoWindow), protoLayout);
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gStockImageWidget = gtk_image_new();
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gtk_container_add(GTK_CONTAINER(protoLayout), gStockImageWidget);
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gtk_widget_ensure_style(gStockImageWidget);
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}
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}
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static GtkIconSize moz_gtk_icon_size(const char* name) {
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if (strcmp(name, "button") == 0) {
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return GTK_ICON_SIZE_BUTTON;
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}
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if (strcmp(name, "menu") == 0) {
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return GTK_ICON_SIZE_MENU;
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}
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if (strcmp(name, "toolbar") == 0) {
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return GTK_ICON_SIZE_LARGE_TOOLBAR;
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}
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if (strcmp(name, "toolbarsmall") == 0) {
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return GTK_ICON_SIZE_SMALL_TOOLBAR;
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}
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if (strcmp(name, "dnd") == 0) {
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return GTK_ICON_SIZE_DND;
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}
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if (strcmp(name, "dialog") == 0) {
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return GTK_ICON_SIZE_DIALOG;
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}
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return GTK_ICON_SIZE_MENU;
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}
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static int32_t GetIconSize(nsIMozIconURI* aIconURI) {
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nsAutoCString iconSizeString;
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aIconURI->GetIconSize(iconSizeString);
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if (iconSizeString.IsEmpty()) {
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uint32_t size;
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mozilla::DebugOnly<nsresult> rv = aIconURI->GetImageSize(&size);
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NS_ASSERTION(NS_SUCCEEDED(rv), "GetImageSize failed");
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return size;
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}
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int size;
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GtkIconSize icon_size = moz_gtk_icon_size(iconSizeString.get());
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gtk_icon_size_lookup(icon_size, &size, nullptr);
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return size;
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}
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/* Scale icon buffer to preferred size */
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static nsresult ScaleIconBuf(GdkPixbuf** aBuf, int32_t iconSize) {
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// Scale buffer only if width or height differ from preferred size
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if (gdk_pixbuf_get_width(*aBuf) != iconSize &&
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gdk_pixbuf_get_height(*aBuf) != iconSize) {
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GdkPixbuf* scaled =
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gdk_pixbuf_scale_simple(*aBuf, iconSize, iconSize, GDK_INTERP_BILINEAR);
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// replace original buffer by scaled
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g_object_unref(*aBuf);
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*aBuf = scaled;
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if (!scaled) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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return NS_OK;
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}
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/* static */
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nsresult nsIconChannel::GetIconWithGIO(nsIMozIconURI* aIconURI,
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ByteBuf* aDataOut) {
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GIcon* icon = nullptr;
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nsCOMPtr<nsIURL> fileURI;
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// Read icon content
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aIconURI->GetIconURL(getter_AddRefs(fileURI));
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// Get icon for file specified by URI
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if (fileURI) {
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nsAutoCString spec;
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fileURI->GetAsciiSpec(spec);
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if (fileURI->SchemeIs("file")) {
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GFile* file = g_file_new_for_uri(spec.get());
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GFileInfo* fileInfo =
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g_file_query_info(file, G_FILE_ATTRIBUTE_STANDARD_ICON,
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G_FILE_QUERY_INFO_NONE, nullptr, nullptr);
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g_object_unref(file);
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if (fileInfo) {
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// icon from g_content_type_get_icon doesn't need unref
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icon = g_file_info_get_icon(fileInfo);
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if (icon) {
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g_object_ref(icon);
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}
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g_object_unref(fileInfo);
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}
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}
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}
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// Try to get icon by using MIME type
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if (!icon) {
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nsAutoCString type;
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aIconURI->GetContentType(type);
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// Try to get MIME type from file extension by using nsIMIMEService
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if (type.IsEmpty()) {
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nsCOMPtr<nsIMIMEService> ms(do_GetService("@mozilla.org/mime;1"));
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if (ms) {
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nsAutoCString fileExt;
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aIconURI->GetFileExtension(fileExt);
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ms->GetTypeFromExtension(fileExt, type);
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}
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}
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char* ctype = nullptr; // character representation of content type
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if (!type.IsEmpty()) {
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ctype = g_content_type_from_mime_type(type.get());
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}
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if (ctype) {
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icon = g_content_type_get_icon(ctype);
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g_free(ctype);
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}
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}
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// Get default icon theme
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GtkIconTheme* iconTheme = gtk_icon_theme_get_default();
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GtkIconInfo* iconInfo = nullptr;
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// Get icon size
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int32_t iconSize = GetIconSize(aIconURI);
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if (icon) {
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// Use icon and theme to get GtkIconInfo
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iconInfo = gtk_icon_theme_lookup_by_gicon(iconTheme, icon, iconSize,
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(GtkIconLookupFlags)0);
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g_object_unref(icon);
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}
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if (!iconInfo) {
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// Mozilla's mimetype lookup failed. Try the "unknown" icon.
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iconInfo = gtk_icon_theme_lookup_icon(iconTheme, "unknown", iconSize,
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(GtkIconLookupFlags)0);
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if (!iconInfo) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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}
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// Create a GdkPixbuf buffer containing icon and scale it
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GdkPixbuf* buf = gtk_icon_info_load_icon(iconInfo, nullptr);
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gtk_icon_info_free(iconInfo);
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if (!buf) {
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return NS_ERROR_UNEXPECTED;
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}
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nsresult rv = ScaleIconBuf(&buf, iconSize);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = MozGdkPixbufToByteBuf(buf, aDataOut);
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g_object_unref(buf);
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return rv;
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}
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/* static */
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nsresult nsIconChannel::GetIcon(nsIURI* aURI, ByteBuf* aDataOut) {
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nsCOMPtr<nsIMozIconURI> iconURI = do_QueryInterface(aURI);
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NS_ASSERTION(iconURI, "URI is not an nsIMozIconURI");
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if (!iconURI) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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if (gfxPlatform::IsHeadless()) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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nsAutoCString stockIcon;
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iconURI->GetStockIcon(stockIcon);
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if (stockIcon.IsEmpty()) {
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return GetIconWithGIO(iconURI, aDataOut);
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}
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// Search for stockIcon
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nsAutoCString iconSizeString;
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iconURI->GetIconSize(iconSizeString);
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nsAutoCString iconStateString;
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iconURI->GetIconState(iconStateString);
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GtkIconSize icon_size = moz_gtk_icon_size(iconSizeString.get());
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GtkStateType state = iconStateString.EqualsLiteral("disabled")
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? GTK_STATE_INSENSITIVE
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: GTK_STATE_NORMAL;
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// First lookup the icon by stock id and text direction.
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GtkTextDirection direction = GTK_TEXT_DIR_NONE;
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if (StringEndsWith(stockIcon, "-ltr"_ns)) {
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direction = GTK_TEXT_DIR_LTR;
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} else if (StringEndsWith(stockIcon, "-rtl"_ns)) {
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direction = GTK_TEXT_DIR_RTL;
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}
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bool forceDirection = direction != GTK_TEXT_DIR_NONE;
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nsAutoCString stockID;
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bool useIconName = false;
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if (!forceDirection) {
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direction = gtk_widget_get_default_direction();
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stockID = stockIcon;
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} else {
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// GTK versions < 2.22 use icon names from concatenating stock id with
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// -(rtl|ltr), which is how the moz-icon stock name is interpreted here.
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stockID = Substring(stockIcon, 0, stockIcon.Length() - 4);
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// However, if we lookup bidi icons by the stock name, then GTK versions
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// >= 2.22 will use a bidi lookup convention that most icon themes do not
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// yet follow. Therefore, we first check to see if the theme supports the
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// old icon name as this will have bidi support (if found).
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GtkIconTheme* icon_theme = gtk_icon_theme_get_default();
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// Micking what gtk_icon_set_render_icon does with sizes, though it's not
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// critical as icons will be scaled to suit size. It just means we follow
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// the same paths and so share caches.
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gint width, height;
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if (gtk_icon_size_lookup(icon_size, &width, &height)) {
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gint size = std::min(width, height);
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// We use gtk_icon_theme_lookup_icon() without
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// GTK_ICON_LOOKUP_USE_BUILTIN instead of gtk_icon_theme_has_icon() so
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// we don't pick up fallback icons added by distributions for backward
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// compatibility.
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GtkIconInfo* icon = gtk_icon_theme_lookup_icon(
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icon_theme, stockIcon.get(), size, (GtkIconLookupFlags)0);
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if (icon) {
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useIconName = true;
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gtk_icon_info_free(icon);
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}
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}
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}
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ensure_stock_image_widget();
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GtkStyle* style = gtk_widget_get_style(gStockImageWidget);
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GtkIconSet* icon_set = nullptr;
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if (!useIconName) {
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icon_set = gtk_style_lookup_icon_set(style, stockID.get());
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}
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if (!icon_set) {
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// Either we have chosen icon-name lookup for a bidi icon, or stockIcon is
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// not a stock id so we assume it is an icon name.
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useIconName = true;
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// Creating a GtkIconSet is a convenient way to allow the style to
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// render the icon, possibly with variations suitable for insensitive
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// states.
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icon_set = gtk_icon_set_new();
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GtkIconSource* icon_source = gtk_icon_source_new();
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gtk_icon_source_set_icon_name(icon_source, stockIcon.get());
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gtk_icon_set_add_source(icon_set, icon_source);
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gtk_icon_source_free(icon_source);
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}
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GdkPixbuf* icon = gtk_icon_set_render_icon(
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icon_set, style, direction, state, icon_size, gStockImageWidget, nullptr);
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if (useIconName) {
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gtk_icon_set_unref(icon_set);
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}
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// According to documentation, gtk_icon_set_render_icon() never returns
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// nullptr, but it does return nullptr when we have the problem reported
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// here: https://bugzilla.gnome.org/show_bug.cgi?id=629878#c13
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if (!icon) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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nsresult rv = MozGdkPixbufToByteBuf(icon, aDataOut);
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g_object_unref(icon);
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return rv;
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}
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nsresult nsIconChannel::Init(nsIURI* aURI) {
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nsCOMPtr<nsIInputStream> stream;
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using ContentChild = mozilla::dom::ContentChild;
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if (auto* contentChild = ContentChild::GetSingleton()) {
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// Get the icon via IPC and translate the promise of a ByteBuf
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// into an actually-existing channel.
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RefPtr<ContentChild::GetSystemIconPromise> icon =
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contentChild->SendGetSystemIcon(aURI);
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if (!icon) {
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return NS_ERROR_UNEXPECTED;
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}
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nsCOMPtr<nsIAsyncInputStream> inputStream;
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nsCOMPtr<nsIAsyncOutputStream> outputStream;
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NS_NewPipe2(getter_AddRefs(inputStream), getter_AddRefs(outputStream), true,
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false, 0, UINT32_MAX);
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// FIXME: Bug 1718324
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// The GetSystemIcon() call will end up on the parent doing GetIcon()
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// and by using ByteBuf we might not be immune to some deadlock, at least
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// on paper. From analysis in
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// https://phabricator.services.mozilla.com/D118596#3865440 we should be
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// safe in practice, but it would be nicer to just write that differently.
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icon->Then(
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mozilla::GetCurrentSerialEventTarget(), __func__,
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[outputStream](std::tuple<nsresult, mozilla::Maybe<ByteBuf>>&& aArg) {
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nsresult rv = std::get<0>(aArg);
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mozilla::Maybe<ByteBuf> bytes = std::move(std::get<1>(aArg));
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if (NS_SUCCEEDED(rv)) {
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MOZ_RELEASE_ASSERT(bytes);
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uint32_t written;
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rv = outputStream->Write(reinterpret_cast<char*>(bytes->mData),
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static_cast<uint32_t>(bytes->mLen),
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&written);
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if (NS_SUCCEEDED(rv)) {
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const bool wroteAll = static_cast<size_t>(written) == bytes->mLen;
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MOZ_ASSERT(wroteAll);
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if (!wroteAll) {
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rv = NS_ERROR_UNEXPECTED;
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}
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}
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} else {
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MOZ_ASSERT(!bytes);
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}
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if (NS_FAILED(rv)) {
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outputStream->CloseWithStatus(rv);
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}
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},
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[outputStream](mozilla::ipc::ResponseRejectReason) {
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outputStream->CloseWithStatus(NS_ERROR_FAILURE);
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});
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stream = inputStream.forget();
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} else {
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// Get the icon directly.
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ByteBuf bytebuf;
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nsresult rv = GetIcon(aURI, &bytebuf);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = ByteBufToStream(std::move(bytebuf), getter_AddRefs(stream));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return StreamToChannel(stream.forget(), aURI, getter_AddRefs(mRealChannel));
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}
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void nsIconChannel::Shutdown() {
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if (gProtoWindow) {
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gtk_widget_destroy(gProtoWindow);
|
|
gProtoWindow = nullptr;
|
|
gStockImageWidget = nullptr;
|
|
}
|
|
}
|