swaybar: allow identifiers for output and tray

This allows `bar output` and `bar tray_output` to specify an output
identifier. Output names should still work as well.

This parses the output identifier from the xdg_output description,
which wlroots currently sets to `make model serial (name)`. Since this
could change in the future, all identifier comparisons are guarded by
NULL-checks in case the description cannot be parsed to an identifier.

1 files changed, 6 insertions, 2 deletions

diff --git a/swaybar/tray/tray.c b/swaybar/tray/tray.c
index 0c3517cb..d5d0c84e 100644
--- a/swaybar/tray/tray.c
+++ b/swaybar/tray/tray.c
@@ -101,13 +101,17 @@ void tray_in(int fd, short mask, void *data) {
 }
 
 static int cmp_output(const void *item, const void *cmp_to) {
-        return strcmp(item, cmp_to);
+        const struct swaybar_output *output = cmp_to;
+        if (output->identifier && strcmp(item, output->identifier) == 0) {
+                return 0;
+        }
+        return strcmp(item, output->name);
 }
 
 uint32_t render_tray(cairo_t *cairo, struct swaybar_output *output, double *x) {
         struct swaybar_config *config = output->bar->config;
         if (config->tray_outputs) {
-                if (list_seq_find(config->tray_outputs, cmp_output, output->name) == -1) {
+                if (list_seq_find(config->tray_outputs, cmp_output, output) == -1) {
                         return 0;
                 }
         } // else display on all