install.packages

@@ -1,3 +1,6 @@
+gui-apps/swayidle
 gui-wm/sway
-net-wireless/wpa_supplicant
+media-gfx/feh
 media-video/pipewire
+net-misc/curl
+net-wireless/wpa_supplicant

overlay/etc/sway/kiosk.conf

@@ -7,5 +7,13 @@ input * {
 }
 
 exec /usr/lib64/firefox/firefox
+exec /usr/bin/photoframe stream
+
+exec swayidle -w \
+    timeout 120 'photoframe show' resume 'photoframe hide'
 
 for_window [title="Mozilla Firefox"] fullscreen
+for_window [class="photoframe"] fullscreen
+
+assign [title="Mozilla Firefox"] 1
+assign [class="photoframe"] 2

overlay/usr/bin/photoframe

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+photoframe_hide() {
+    swaymsg 'workspace 1'
+}
+
+photoframe_show() {
+    # Run on a separate workspace so Firefox can stay fullscreen, too
+    swaymsg 'workspace 2'
+    if [ -f /tmp/photoframe.pid ]; then
+        # feh is already running
+        return 0
+    fi
+    if [ ! -f /tmp/photoframe-current ]; then
+        cp /usr/share/feh/images/feh.png /tmp/photoframe-current
+    fi
+    feh -FZ --draw-exif --class photoframe /tmp/photoframe-current &
+    # Wait for the feh window to actually appear ...
+    swaymsg -t subscribe '["window"]'
+    # Sometimes, Sway's `for_window ... fullscreen` doesn't work?
+    swaymsg fullscreen
+    echo $! > /tmp/photoframe.pid
+}
+
+photoframe_stream() {
+    while :; do
+        curl -NsS https://photos.pyrocufflink.blue/stream |
+            while read url; do
+                curl -fsL -o /tmp/photoframe-next "${url}" || continue
+                mv /tmp/photoframe-next /tmp/photoframe-current
+            done
+        sleep 30
+    done
+}
+
+case $1 in
+show)
+    photoframe_show
+    ;;
+hide)
+    photoframe_hide
+    ;;
+stream)
+    photoframe_stream
+    ;;
+esac

portage/package.use/photoframe

@@ -0,0 +1,5 @@
+gui-apps/swayidle -systemd
+gui-libs/wlroots X
+gui-wm/sway X
+media-gfx/feh exif inotify
+net-misc/curl -alt-svc -ftp -hsts -http3 -imap -pop3 -progress-meter -psl -quic -smtp -tftp -websockets -adns -http2 CURL_QUIC: -*