TouchpadOnOff extension: first commit

.gitignore

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+*~
+*.swp

README.md

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+# TouchPad On-Off
+
+By Romano Giannetti <[email protected]> , <[email protected]>
+
+### Rationale
+
+Most laptops have a key combination (usually some Fn-*thing*) to enable/disable the touchpad.
+But not all of them. My Lenovo Yoga L13, for example, doesn't have one.
+This extension just enables/disables the touchpad; 
+by default it restores the touchpad in the enabled state when you logout and login,
+but you can choose to just remember the old state in the options.
+
+### Features
+
+Click on the icon to change from Touchpad On to Off. 
+
+Each click toggle the status.
+
+### Options
+
+* You can choose to have a notification for each change of status or not.
+(default yes)
+* You can choose if the touchpad starts enabled after login (default yes) or if it remembers the last value.
+
+![screenshot](screenshot.png)
+
+### I'm stuck!
+
+If you are stuck without mouse or touchpad, open a terminal window
+or the command prompt of gnome shell (with Alt-F2) and issue 
+
+    dconf write /org/gnome/desktop/peripherals/touchpad/send-events true
+
+...and you'll have your touchpad back.
+

TouchpadOnOff@romano.rgtti.com/extension.js

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+// Touchpad On Off extension (c) 2024 Romano Giannetti <[email protected]>
+// License: GPLv2+, see http://www.gnu.org/licenses/gpl-2.0.txt
+//
+import Clutter from 'gi://Clutter';
+import St from 'gi://St';
+import Gio from 'gi://Gio';
+import * as Main from 'resource:///org/gnome/shell/ui/main.js';
+
+import {Extension} from 'resource:///org/gnome/shell/extensions/extension.js';
+
+let button, icon_on, icon_off, wm_prefs, my_prefs;
+
+function _switch() {
+    let what=wm_prefs.get_string('send-events');
+    let pNotify=my_prefs.get_boolean('show-notifications');
+    if (what == 'enabled') {
+        if (pNotify) {
+            Main.notify("Touchpad On Off", "Switching touchpad off");
+        }
+        // not needed, set by the callback
+        // button.set_child(icon_off);
+        wm_prefs.set_string('send-events', 'disabled');
+    } else {
+        if (pNotify) {
+            Main.notify("Touchpad On Off", "Switchin touchpad on");
+        }
+        // not needed, set by the callback
+        // button.set_child(icon_on);
+        wm_prefs.set_string('send-events', 'enabled');
+    }
+}
+
+function _sync() {
+    let what=wm_prefs.get_string('send-events');
+    if (what == 'enabled') {
+        button.set_child(icon_on);
+    } else {
+        button.set_child(icon_off);
+    }
+}
+
+export default class TouchpadOnOff extends Extension {
+    constructor(metadata) {
+        super(metadata);
+        this._metadata = metadata;
+        this._first_time = true;
+    }
+    enable() {
+        button = new St.Bin({ style_class: 'panel-button',
+            reactive: true,
+            can_focus: true,
+            track_hover: true });
+        let dir;
+        dir = this._metadata.path;
+        icon_on = new St.Icon({ style_class: 'system-status-icon'});
+        icon_on.gicon = Gio.icon_new_for_string(dir + '/icons/touchpadon.svg');
+        icon_off = new St.Icon({ style_class: 'system-status-icon'});
+        icon_off.gicon = Gio.icon_new_for_string(dir + '/icons/touchpadoff.svg');
+        wm_prefs=new Gio.Settings({schema: 'org.gnome.desktop.peripherals.touchpad'});
+        // get settings
+        my_prefs= this.getSettings();
+        // let activate the touchpad on login. Useful if you get stuck
+        // without any pointing device!
+        if (this._first_time) {
+            let enable_on_login=my_prefs.get_boolean('enable-on-login');
+            if (enable_on_login) {
+                wm_prefs.set_string('send-events', 'enabled');
+                this._first_time = false;
+            }
+        }
+        this._connectionId = button.connect('button-press-event', _switch);
+        this._setconnectionId = wm_prefs.connect('changed::send-events', (s, k) => { _sync() });
+        // start with the current status --- sync icon
+        _sync();
+        Main.panel._rightBox.insert_child_at_index(button, 0);
+    }
+    disable() {
+        button.disconnect(this._connectionId);
+        wm_prefs.disconnect(this._setconnectionId);
+        Main.panel._rightBox.remove_child(button);
+        button?.destroy();
+        button = null;
+        wm_prefs = null;
+        my_prefs = null;
+        icon_on = null;
+        icon_off = null;
+    }
+}
+