add extension source and plan

hangul-overview-latin@timothykim.net/extension.js

@@ -0,0 +1,56 @@
+import IBus from 'gi://IBus';
+
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+import {Extension} from 'resource:///org/gnome/shell/extensions/extension.js';
+import {
+    getInputSourceManager,
+    INPUT_SOURCE_TYPE_XKB,
+    INPUT_SOURCE_TYPE_IBUS,
+} from 'resource:///org/gnome/shell/ui/status/keyboard.js';
+import {getIBusManager} from 'resource:///org/gnome/shell/misc/ibusManager.js';
+
+export default class HangulOverviewLatin extends Extension {
+    enable() {
+        this._showingId = Main.overview.connect('showing',
+            () => this._ensureLatin());
+    }
+
+    disable() {
+        Main.overview.disconnect(this._showingId);
+        this._showingId = null;
+    }
+
+    _ensureLatin() {
+        const ism = getInputSourceManager();
+        const src = ism.currentSource;
+        if (src?.type !== INPUT_SOURCE_TYPE_IBUS || !src.id.startsWith('hangul'))
+            return;
+
+        // ibus-hangul's InputMode handler toggles regardless of the state
+        // argument, so only activate it when currently in Hangul mode.
+        const prop = this._findProp(src.properties, 'InputMode');
+        if (prop) {
+            if (prop.get_state() === IBus.PropState.CHECKED) {
+                getIBusManager().activateProperty(
+                    prop.get_key(), IBus.PropState.UNCHECKED);
+            }
+            return;
+        }
+
+        // No InputMode property: switch to the first xkb source instead
+        for (const i of Object.keys(ism.inputSources)) {
+            if (ism.inputSources[i].type === INPUT_SOURCE_TYPE_XKB) {
+                ism.inputSources[i].activate(true);
+                return;
+            }
+        }
+    }
+
+    _findProp(props, key) {
+        for (let i = 0, prop; (prop = props?.get(i)); i++) {
+            if (prop.get_key() === key)
+                return prop;
+        }
+        return null;
+    }
+}

hangul-overview-latin@timothykim.net/metadata.json

@@ -0,0 +1,7 @@
+{
+  "uuid": "hangul-overview-latin@timothykim.net",
+  "name": "Hangul Overview Latin",
+  "description": "Switch ibus-hangul to Latin input when the Activities Overview opens, so search works immediately.",
+  "shell-version": ["50"],
+  "url": ""
+}