Finds paths to icon files using libsfdo. Libsfdo is currently an

optional compile time dependency. This means the former code paths are
all retained and new ones are wrapped in #if HAVE_LIBSFDO. Behavior
should be identical now between the two code paths. Later commits will
add the handling of icons specified as absolute paths which both former
swaybar code and libsfdo have thus far avoided.

common/meson.build

@@ -8,6 +8,7 @@ lib_sway_common = static_library(
 		'loop.c',
 		'list.c',
 		'pango.c',
+		'sfdo.c',
 		'stringop.c',
 		'util.c'
 	),

common/sfdo.c

@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <sfdo-basedir.h>
+#include <sfdo-desktop.h>
+#include <sfdo-icon.h>
+
+#include "log.h"
+#include "sfdo.h"
+
+char *sfdo_icon_lookup_extended(struct sfdo *sfdo, char *icon_name, int target_size, int scale) {
+	int lookup_options = SFDO_ICON_THEME_LOOKUP_OPTIONS_DEFAULT;
+	struct sfdo_icon_file *icon_file = \
+		sfdo_icon_theme_lookup(sfdo->icon_theme, icon_name, SFDO_NT, \
+			target_size, scale, lookup_options);
+	char *icon_path = NULL;
+	if (icon_file && icon_file != SFDO_ICON_FILE_INVALID) {
+		icon_path = strdup(sfdo_icon_file_get_path(icon_file, NULL));
+	}
+	sfdo_icon_file_destroy(icon_file);
+	return icon_path;
+}
+
+struct sfdo *sfdo_create(char *icon_theme) {
+	if (!icon_theme) {
+		goto error_null;
+	}
+
+	struct sfdo *sfdo = calloc(1, sizeof(struct sfdo));
+	if (!sfdo) {
+		goto error_calloc;
+	}
+
+	struct sfdo_basedir_ctx *basedir_ctx = sfdo_basedir_ctx_create();
+	if (!basedir_ctx) {
+		goto error_basedir_ctx;
+	}
+
+	sfdo->desktop_ctx = sfdo_desktop_ctx_create(basedir_ctx);
+	if (!sfdo->desktop_ctx) {
+		goto error_desktop_ctx;
+	}
+
+	sfdo->icon_ctx = sfdo_icon_ctx_create(basedir_ctx);
+	if (!sfdo->icon_ctx) {
+		goto error_icon_ctx;
+	}
+
+	sfdo->desktop_db = sfdo_desktop_db_load(sfdo->desktop_ctx, NULL);
+	if (!sfdo->desktop_db) {
+		goto error_desktop_db;
+	}
+
+	int load_options = SFDO_ICON_THEME_LOAD_OPTIONS_DEFAULT
+		| SFDO_ICON_THEME_LOAD_OPTION_ALLOW_MISSING
+		| SFDO_ICON_THEME_LOAD_OPTION_RELAXED;
+
+	sfdo->icon_theme = sfdo_icon_theme_load(sfdo->icon_ctx, icon_theme, load_options);
+	if (!sfdo->icon_theme) {
+		goto error_icon_theme;
+	}
+
+	sfdo_basedir_ctx_destroy(basedir_ctx);
+
+	sway_log(SWAY_INFO, "Successfully setup sfdo with icon theme %s", icon_theme);
+	return sfdo;
+
+error_icon_theme:
+	sfdo_desktop_db_destroy(sfdo->desktop_db);
+error_desktop_db:
+	sfdo_icon_ctx_destroy(sfdo->icon_ctx);
+error_icon_ctx:
+	sfdo_desktop_ctx_destroy(sfdo->desktop_ctx);
+error_desktop_ctx:
+	sfdo_basedir_ctx_destroy(basedir_ctx);
+error_basedir_ctx:
+	free(sfdo);
+error_calloc:
+error_null:
+	// it's safe to call with null
+	sway_log(SWAY_ERROR, "Failed to setup sfdo with icon theme %s", icon_theme);
+	return NULL;
+}
+
+void sfdo_destroy(struct sfdo *sfdo) {
+	if (!sfdo) {
+		sway_log(SWAY_DEBUG, "Null sfdo passed in");
+		return;
+	}
+
+	sfdo_desktop_ctx_destroy(sfdo->desktop_ctx);
+	sfdo_icon_ctx_destroy(sfdo->icon_ctx);
+	sfdo_desktop_db_destroy(sfdo->desktop_db);
+	sfdo_icon_theme_destroy(sfdo->icon_theme);
+	free(sfdo);
+	sway_log(SWAY_DEBUG, "Successfully destroyed sfdo");
+}

include/sfdo.h

@@ -0,0 +1,19 @@
+#ifndef _SWAY_SFDO_H
+#define _SWAY_SFDO_H
+
+#include <sfdo-desktop.h>
+#include <sfdo-icon.h>
+#include <sfdo-basedir.h>
+
+struct sfdo {
+	struct sfdo_desktop_ctx *desktop_ctx;
+	struct sfdo_icon_ctx *icon_ctx;
+	struct sfdo_desktop_db *desktop_db;
+	struct sfdo_icon_theme *icon_theme;
+};
+
+char *sfdo_icon_lookup_extended(struct sfdo *sfdo, char *icon_name, int target_size, int scale);
+struct sfdo *sfdo_create(char *icon_theme);
+void sfdo_destroy(struct sfdo *sfdo);
+
+#endif

include/sway/config.h

@@ -399,8 +399,11 @@ struct bar_config {
 		char *binding_mode_text;
 	} colors;
 
-#if HAVE_TRAY
+#if HAVE_TRAY || HAVE_LIBSFDO
 	char *icon_theme;
+#endif
+
+#if HAVE_TRAY
 	struct wl_list tray_bindings; // struct tray_binding::link
 	list_t *tray_outputs; // char *
 	int tray_padding;

include/sway/server.h

@@ -8,11 +8,11 @@
 #if WLR_HAS_XWAYLAND
 #include "sway/xwayland.h"
 #endif
+
 #if HAVE_LIBSFDO
-#include <sfdo-desktop.h>
+#include "sfdo.h"
-#include <sfdo-icon.h>
-#include <sfdo-basedir.h>
 #endif
+
 struct sway_transaction;
 
 struct sway_session_lock {
@@ -28,15 +28,6 @@ struct sway_session_lock {
 	struct wl_listener destroy;
 };
 
-#if HAVE_LIBSFDO
-struct sfdo {
-	struct sfdo_desktop_ctx *desktop_ctx;
-	struct sfdo_icon_ctx *icon_ctx;
-	struct sfdo_desktop_db *desktop_db;
-	struct sfdo_icon_theme *icon_theme;
-};
-#endif
-
 struct sway_server {
 	struct wl_display *wl_display;
 	struct wl_event_loop *wl_event_loop;
@@ -210,9 +201,4 @@ void set_rr_scheduling(void);
 
 void handle_new_tearing_hint(struct wl_listener *listener, void *data);
 
-#if HAVE_LIBSFDO
-struct sfdo *sfdo_create(char *theme);
-void sfdo_destroy(struct sfdo *sfdo);
-#endif
-
 #endif

include/swaybar/bar.h

@@ -16,6 +16,10 @@ struct swaybar_tray;
 struct swaybar_workspace;
 struct loop;
 
+#if HAVE_LIBSFDO
+struct sfdo;
+#endif
+
 struct swaybar {
 	char *id;
 	char *mode;
@@ -50,6 +54,10 @@ struct swaybar {
 	struct swaybar_tray *tray;
 #endif
 
+#if HAVE_LIBSFDO
+	struct sfdo *sfdo;
+#endif
+
 	bool running;
 };
 

include/swaybar/config.h

@@ -8,6 +8,10 @@
 #include "util.h"
 #include <pango/pangocairo.h>
 
+#if HAVE_LIBSFDO
+#include "sfdo.h"
+#endif
+
 struct box_colors {
 	uint32_t border;
 	uint32_t background;
@@ -73,13 +77,20 @@ struct swaybar_config {
 		struct box_colors binding_mode;
 	} colors;
 
-#if HAVE_TRAY
+#if HAVE_TRAY || HAVE_LIBSFDO
 	char *icon_theme;
+#endif
+
+#if HAVE_TRAY
 	struct wl_list tray_bindings; // struct tray_binding::link
 	bool tray_hidden;
 	list_t *tray_outputs; // char *
 	int tray_padding;
 #endif
+
+#if HAVE_LIBSFDO
+	struct sfdo *sfdo;
+#endif
 };
 
 #if HAVE_TRAY

sway/config/bar.c

@@ -70,6 +70,14 @@ void free_bar_config(struct bar_config *bar) {
 	free(bar->colors.binding_mode_border);
 	free(bar->colors.binding_mode_bg);
 	free(bar->colors.binding_mode_text);
+
+	// this is to cover the case where tray support is not compiled in
+	// but we have libsfdo support which implies at least a default
+	// icon_theme string was allocated
+#if HAVE_LIBSFDO && !HAVE_TRAY
+	free(bar->icone_theme);
+#endif
+
 #if HAVE_TRAY
 	list_free_items_and_destroy(bar->tray_outputs);
 	free(bar->icon_theme);
@@ -170,6 +178,13 @@ struct bar_config *default_bar_config(void) {
 	bar->colors.binding_mode_bg = NULL;
 	bar->colors.binding_mode_text = NULL;
 
+	// we need some default when we initialize sfdo
+#if HAVE_LIBSFDO
+	if (!(bar->icon_theme = strdup("Hicolor"))) {
+		goto cleanup;
+	}
+#endif
+
 #if HAVE_TRAY
 	bar->tray_padding = 2;
 	wl_list_init(&bar->tray_bindings);

sway/server.c

@@ -70,9 +70,7 @@
 #endif
 
 #if HAVE_LIBSFDO
-#include <sfdo-basedir.h>
+#include "sfdo.h"
-#include <sfdo-desktop.h>
-#include <sfdo-icon.h>
 #endif
 
 #define SWAY_XDG_SHELL_VERSION 5

swaybar/bar.c

@@ -537,6 +537,9 @@ static void free_seats(struct wl_list *list) {
 void bar_teardown(struct swaybar *bar) {
 #if HAVE_TRAY
 	destroy_tray(bar->tray);
+#endif
+#if HAVE_LIBSFDO
+	sfdo_destroy(bar->config->sfdo);
 #endif
 	free_outputs(&bar->outputs);
 	free_outputs(&bar->unused_outputs);

swaybar/config.c

@@ -7,6 +7,10 @@
 #include "list.h"
 #include "log.h"
 
+#if HAVE_LIBSFDO
+#include "sfdo.h"
+#endif
+
 uint32_t parse_position(const char *position) {
 	uint32_t horiz = ZWLR_LAYER_SURFACE_V1_ANCHOR_LEFT |
 		ZWLR_LAYER_SURFACE_V1_ANCHOR_RIGHT;
@@ -131,5 +135,15 @@ void free_config(struct swaybar_config *config) {
 
 	free(config->icon_theme);
 #endif
+
+#if HAVE_LIBSFDO && !HAVE_TRAY
+	free(config->icon_theme);
+#endif
+
+#if HAVE_LIBSFDO
+	sfdo_destroy(config->sfdo);
+	sway_log(SWAY_DEBUG, "Destroyed swaybar sfdo");
+#endif
+
 	free(config);
 }

swaybar/ipc.c

@@ -18,6 +18,10 @@
 #include "stringop.h"
 #include "util.h"
 
+#if HAVE_LIBSFDO
+#include "sfdo.h"
+#endif
+
 void ipc_send_workspace_command(struct swaybar *bar, const char *ws) {
 	uint32_t size = strlen("workspace \"\"") + strlen(ws);
 	for (size_t i = 0; i < strlen(ws); ++i) {
@@ -330,6 +334,10 @@ static bool ipc_parse_config(
 
 	if ((json_object_object_get_ex(bar_config, "icon_theme", &icon_theme))) {
 		config->icon_theme = strdup(json_object_get_string(icon_theme));
+#if HAVE_LIBSFDO
+		sfdo_destroy(config->sfdo);
+		config->sfdo = sfdo_create(config->icon_theme);
+#endif
 	}
 #endif
 

swaybar/meson.build

@@ -21,6 +21,15 @@ if have_tray
 	swaybar_deps += sdbus
 endif
 
+if have_libsfdo
+	swaybar_deps += [
+		sfdo_basedir,
+		sfdo_desktop,
+		sfdo_desktop_file,
+		sfdo_icon
+	]
+endif
+
 executable(
 	'swaybar', [
 		'bar.c',

swaybar/tray/item.c

@@ -1,6 +1,8 @@
 #include <arpa/inet.h>
 #include <cairo.h>
 #include <limits.h>
+#include <sfdo-common.h>
+#include <sfdo-icon.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -18,6 +20,10 @@
 #include "stringop.h"
 #include "wlr-layer-shell-unstable-v1-client-protocol.h"
 
+#if HAVE_LIBSFDO
+#include "sfdo.h"
+#endif
+
 // TODO menu
 
 static bool sni_ready(struct swaybar_sni *sni) {
@@ -420,15 +426,36 @@ static void reload_sni(struct swaybar_sni *sni, char *icon_theme,
 	char *icon_name = sni->status[0] == 'N' ?
 		sni->attention_icon_name : sni->icon_name;
 	if (icon_name) {
+		char *icon_path = NULL;
+#if !HAVE_LIBSFDO
 		list_t *icon_search_paths = create_list();
 		list_cat(icon_search_paths, sni->tray->basedirs);
 		if (sni->icon_theme_path) {
 			list_add(icon_search_paths, sni->icon_theme_path);
 		}
-		char *icon_path = find_icon(sni->tray->themes, icon_search_paths,
+		icon_path = find_icon(sni->tray->themes, icon_search_paths,
 				icon_name, target_size, icon_theme,
 				&sni->min_size, &sni->max_size);
+#else
+		struct sfdo *sfdo = sni->tray->bar->config->sfdo;
+		if (sfdo) {
+			int lookup_options = SFDO_ICON_THEME_LOOKUP_OPTIONS_DEFAULT;
+			int scale = 1;
+			struct sfdo_icon_file *icon_file = \
+				sfdo_icon_theme_lookup(sfdo->icon_theme, icon_name, SFDO_NT, \
+					target_size, scale, lookup_options);
+			if (!icon_file || icon_file == SFDO_ICON_FILE_INVALID) {
+				sway_log(SWAY_ERROR, "sfdo: icon %s invalid or not found in theme %s at size %d", \
+					icon_name, icon_theme, target_size);
+			} else {
+				icon_path = strdup(sfdo_icon_file_get_path(icon_file, NULL));
+			}
+			sfdo_icon_file_destroy(icon_file);
+		}
+#endif
+#if !HAVE_LIBSFDO
 		list_free(icon_search_paths);
+#endif
 		if (icon_path) {
 			cairo_surface_destroy(sni->icon);
 			sni->icon = load_image(icon_path);