Add libmoc playback commands and Athena widget UIHEADmaster

Extends moc_library with playlist tracking and thread-safe playback
commands (play/pause/stop/next/prev/playlist add/remove/clear), and
adds moc_xaw.c, an Athena widget UI with a directory browser and live
playlist view. Also taller default window and playlist rendering in
moc_x11.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/moc_x11.c b/moc_x11.c
index efff073..3ec7c50 100644
--- a/moc_x11.c
+++ b/moc_x11.c
@@ -93,7 +93,7 @@ int main() {
     }
 
     int s = DefaultScreen(dpy);
-    Window win = XCreateSimpleWindow(dpy, RootWindow(dpy, s), 10, 10, 660, 200, 1,
+    Window win = XCreateSimpleWindow(dpy, RootWindow(dpy, s), 10, 10, 660, 600, 1,
         BlackPixel(dpy, s), WhitePixel(dpy, s));
     XSelectInput(dpy, win, ExposureMask | ButtonPress | KeyPressMask);
     XMapWindow(dpy, win);
@@ -152,6 +152,18 @@ int main() {
 
 
       }
+
+      y_offset += 10;
+      XDrawString(dpy, win, DefaultGC(dpy, s), x, y_offset, "Playlist:", 9);
+      y_offset += 15;
+      {
+        struct moc_plist_item *item;
+        for (item = mh->playlist; item; item = item->next) {
+          const char *label = (item->title && item->title[0]) ? item->title : item->file;
+          XDrawString(dpy, win, DefaultGC(dpy, s), x, y_offset, label, strlen(label));
+          y_offset += 15;
+        }
+      }
       pthread_mutex_unlock(&mh->lock);
 
       }