Unified emoji support across builds, fixed picker bugs, and added CI checks.

2026-10-17 18:37:14 +00:00 · 2026-09-10 07:13:41 -06:00
parent bb3893d36c
commit 8bf2caf20d
41 changed files with 40267 additions and 174 deletions
@@ -0,0 +1,115 @@
+/* ZoiteChat -- shared, process-private emoji font rendering.
+ * Distributed under GPL-2.0-or-later; see COPYING. */
+
+#include "fe-gtk.h"
+#include "emoji-font.h"
+
+#include <fontconfig/fontconfig.h>
+#include <pango/pangocairo.h>
+#include <pango/pangofc-fontmap.h>
+#ifdef G_OS_WIN32
+#include <glib/gwin32.h>
+#endif
+
+static char *
+emoji_font_path (void)
+{
+	const char *override = g_getenv ("ZOITECHAT_EMOJI_FONT");
+
+	if (override && *override)
+		return g_strdup (override);
+
+#ifdef G_OS_WIN32
+	{
+		char *base = g_win32_get_package_installation_directory_of_module (NULL);
+		char *path;
+
+		if (!base)
+			return NULL;
+		path = g_build_filename (base, "share", "fonts", "zoitechat",
+			"NotoColorEmoji.ttf", NULL);
+		g_free (base);
+		return path;
+	}
+#else
+	return g_build_filename (ZOITECHAT_DATADIR, "fonts", "zoitechat",
+		"NotoColorEmoji.ttf", NULL);
+#endif
+}
+
+PangoFontMap *
+emoji_font_get_map (void)
+{
+	static PangoFontMap *map;
+	static gboolean attempted;
+	FcConfig *config;
+	char *path, *escaped, *rules;
+	gboolean registered;
+
+	/* GTK widgets are used on the main thread. Keep the map alive for every
+	 * layout's lifetime, including detached chat windows and shutdown. */
+	if (attempted)
+		return map;
+	attempted = TRUE;
+
+	path = emoji_font_path ();
+	if (!path || !g_file_test (path, G_FILE_TEST_IS_REGULAR))
+	{
+		g_warning ("Bundled emoji font is missing: %s", path ? path : "(unknown path)");
+		g_free (path);
+		return NULL;
+	}
+
+	/* Keep the system configuration for normal fonts and user preferences.
+	 * Give ONLY our application font a private family so an older system
+	 * Noto cannot win the match. Never install fonts globally or override
+	 * digits, '#' or '*' in the widget's ordinary text font. */
+	config = FcInitLoadConfigAndFonts ();
+	if (!config)
+	{
+		g_warning ("Unable to load font configuration for emoji rendering");
+		g_free (path);
+		return NULL;
+	}
+	escaped = g_markup_escape_text (path, -1);
+	rules = g_strdup_printf (
+		"<fontconfig>"
+		"<match target='scan'><test name='file'><string>%s</string></test>"
+		"<edit name='family' mode='assign'><string>" ZOITECHAT_EMOJI_FAMILY
+		"</string></edit></match>"
+		"<match target='pattern'><test name='family'><string>emoji</string></test>"
+		"<edit name='family' mode='prepend' binding='strong'><string>"
+		ZOITECHAT_EMOJI_FAMILY "</string></edit></match>"
+		"</fontconfig>", escaped);
+	registered = FcConfigParseAndLoadFromMemory (config, (const FcChar8 *) rules, FcTrue) &&
+		FcConfigAppFontAddFile (config, (const FcChar8 *) path);
+	g_free (rules);
+	g_free (escaped);
+	g_free (path);
+
+	if (registered)
+	{
+		/* GDI cannot load Noto's CBDT/CBLC color glyphs. FreeType works on
+		 * Windows 7 too, and is shipped in all of our GTK dependency bundles. */
+		map = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT);
+		if (map && PANGO_IS_FC_FONT_MAP (map))
+			pango_fc_font_map_set_config (PANGO_FC_FONT_MAP (map), config);
+		else
+			g_clear_object (&map);
+	}
+	FcConfigDestroy (config);
+	if (!map)
+		g_warning ("Unable to initialize bundled emoji rendering; using system fonts");
+	return map;
+}
+
+void
+emoji_font_apply (GtkWidget *widget)
+{
+	PangoFontMap *map;
+
+	g_return_if_fail (GTK_IS_WIDGET (widget));
+	map = emoji_font_get_map ();
+	if (map && gtk_widget_get_font_map (widget) != map)
+		gtk_widget_set_font_map (widget, map);
+}