feat(src/window/panel/notch): add CapsLockIndicator and KeyboardLayoutIndicator

Add transient indicator pages for caps lock and keyboard layout, update stack children and handling to show/hide after timeout.

src/window/panel/notch/indicators.py

@@ -0,0 +1,141 @@
+from fabric.utils import GLib, logger
+from fabric.widgets.box import Box
+from fabric.widgets.centerbox import CenterBox
+from fabric.widgets.label import Label
+
+from services.capslock import CapsLock
+from services.keyboard_layout import KeyboardLayout
+from utils.utils import svg_file
+
+DISPLAY_MS = 2000  # how long each indicator stays visible
+
+
+class KeyboardLayoutIndicator(Box):
+    def __init__(self, show_cb, hide_cb, **kwargs):
+        super().__init__(
+            name="notch-kbd-layout",
+            orientation="h",
+            h_expand=True,
+            v_align="center",
+            **kwargs,
+        )
+
+        self._show_cb = show_cb
+        self._hide_cb = hide_cb
+        self._hide_timer_id = 0
+
+        self._kbd = KeyboardLayout.get_initial()
+
+        self._icon = svg_file(
+            "misc/keyboard-layout.svg",
+            size=16,
+            name="notch-indicator-icon",
+            v_align="center",
+        )
+        self._label = Label(
+            name="notch-indicator-label",
+            label=self._kbd.current_layout.upper(),
+            v_align="center",
+        )
+
+        self.add(
+            CenterBox(
+                orientation="h",
+                h_expand=True,
+                start_children=self._icon,
+                end_children=self._label,
+            )
+        )
+
+        self._kbd.connect("layout_changed", self._on_layout_changed)
+
+    def _on_layout_changed(self, _service, layout: str):
+        self._label.set_label(layout.upper())
+        self._show_cb(self)
+        self._schedule_hide()
+
+    def _schedule_hide(self):
+        if self._hide_timer_id:
+            GLib.source_remove(self._hide_timer_id)
+        self._hide_timer_id = GLib.timeout_add(DISPLAY_MS, self._do_hide)
+
+    def _do_hide(self):
+        self._hide_timer_id = 0
+        self._hide_cb()
+        return False
+
+    def destroy(self):
+        if self._hide_timer_id:
+            GLib.source_remove(self._hide_timer_id)
+            self._hide_timer_id = 0
+        try:
+            self._kbd.disconnect_by_func(self._on_layout_changed)
+        except Exception as e:
+            logger.warning(f"[NotchIndicators] kbd disconnect: {e}")
+        super().destroy()
+
+
+class CapsLockIndicator(Box):
+    def __init__(self, show_cb, hide_cb, **kwargs):
+        super().__init__(
+            name="notch-capslock",
+            orientation="h",
+            h_expand=True,
+            v_align="center",
+            **kwargs,
+        )
+
+        self._show_cb = show_cb
+        self._hide_cb = hide_cb
+        self._hide_timer_id = 0
+
+        self._caps = CapsLock.get_initial()
+
+        self._icon = svg_file(
+            "misc/caps-lock.svg",
+            size=16,
+            name="notch-indicator-icon",
+            v_align="center",
+        )
+        self._label = Label(
+            name="notch-indicator-label",
+            label="On",
+            v_align="center",
+        )
+
+        self.add(
+            CenterBox(
+                orientation="h",
+                h_expand=True,
+                start_children=self._icon,
+                end_children=self._label,
+            )
+        )
+
+        self._caps.connect("state_changed", self._on_state_changed)
+
+    def _on_state_changed(self, _service, is_on: bool):
+        if not is_on:
+            return
+        self._show_cb(self)
+        self._schedule_hide()
+
+    def _schedule_hide(self):
+        if self._hide_timer_id:
+            GLib.source_remove(self._hide_timer_id)
+        self._hide_timer_id = GLib.timeout_add(DISPLAY_MS, self._do_hide)
+
+    def _do_hide(self):
+        self._hide_timer_id = 0
+        self._hide_cb()
+        return False
+
+    def destroy(self):
+        if self._hide_timer_id:
+            GLib.source_remove(self._hide_timer_id)
+            self._hide_timer_id = 0
+        try:
+            self._caps.disconnect_by_func(self._on_state_changed)
+        except Exception as e:
+            logger.warning(f"[NotchIndicators] caps disconnect: {e}")
+        super().destroy()