Wire up the backend

kittens/choose_fonts/backend.py

@@ -0,0 +1,30 @@
+#!/usr/bin/env python
+# License: GPLv3 Copyright: 2024, Kovid Goyal <kovid at kovidgoyal.net>
+
+import json
+import sys
+from typing import Any
+
+from kitty.fonts.common import get_variable_data_for_descriptor
+from kitty.fonts.list import create_family_groups
+
+
+def send_to_kitten(x: Any) -> None:
+    sys.stdout.buffer.write(json.dumps(x).encode())
+    sys.stdout.buffer.write(b'\n')
+    sys.stdout.buffer.flush()
+
+
+def main() -> None:
+    for line in sys.stdin.buffer:
+        cmd = json.loads(line)
+        action = cmd.get('action', '')
+        if action == 'list_monospaced_fonts':
+            send_to_kitten(create_family_groups())
+        elif action == 'read_variable_data':
+            ans = []
+            for descriptor in cmd['descriptors']:
+                ans.append(get_variable_data_for_descriptor(descriptor))
+            send_to_kitten(ans)
+        else:
+            raise SystemExit(f'Unknown action: {action}')

kittens/choose_fonts/ui.go

@@ -178,7 +178,7 @@ func (h *handler) handle_listing_key_event(event *loop.KeyEvent) (err error) {
 			h.update_family_search()
 			h.draw_screen()
 		} else {
-			h.lp.Quit(1)
+			return fmt.Errorf("canceled by user")
 		}
 		return
 	}
@@ -241,7 +241,7 @@ func (h *handler) initialize() {
 	h.draw_screen()
 	initialize_variable_data_cache()
 	go func() {
-		h.set_worker_error(kitty_font_backend.query("list_all_fonts", nil, &h.fonts))
+		h.set_worker_error(kitty_font_backend.query("list_monospaced_fonts", nil, &h.fonts))
 		h.lp.WakeupMainThread()
 	}()
 }
@@ -290,8 +290,7 @@ func (h *handler) on_mouse_event(event *loop.MouseEvent) (err error) {
 func (h *handler) on_key_event(event *loop.KeyEvent) (err error) {
 	if event.MatchesPressOrRepeat("ctrl+c") {
 		event.Handled = true
-		h.lp.Quit(1)
-		return nil
+		return fmt.Errorf("canceled by user")
 	}
 	switch h.state {
 	case LISTING_FAMILIES: