gnome-shell/js/ui/kbdA11yDialog.js

const Clutter = imports.gi.Clutter;
const Gio = imports.gi.Gio;
const GObject = imports.gi.GObject;
const Dialog = imports.ui.dialog;
const ModalDialog = imports.ui.modalDialog;

const KEYBOARD_A11Y_SCHEMA    = 'org.gnome.desktop.a11y.keyboard';
const KEY_STICKY_KEYS_ENABLED = 'stickykeys-enable';
const KEY_SLOW_KEYS_ENABLED   = 'slowkeys-enable';

var KbdA11yDialog = new GObject.registerClass(
class KbdA11yDialog extends GObject.Object {
    _init() {
        super._init();

        this._a11ySettings = new Gio.Settings({ schema_id: KEYBOARD_A11Y_SCHEMA });

        let deviceManager = Clutter.DeviceManager.get_default();
        deviceManager.connect('kbd-a11y-flags-changed',
                              this._showKbdA11yDialog.bind(this));
    }

    _showKbdA11yDialog(deviceManager, newFlags, whatChanged) {
        let dialog = new ModalDialog.ModalDialog();
        let title, body;
        let key, enabled;

        if (whatChanged & Clutter.KeyboardA11yFlags.SLOW_KEYS_ENABLED) {
            key = KEY_SLOW_KEYS_ENABLED;
            enabled = (newFlags & Clutter.KeyboardA11yFlags.SLOW_KEYS_ENABLED) ? true : false;
            title = enabled ?
                    _("Slow Keys Turned On") :
                    _("Slow Keys Turned Off");
            body = _("You just held down the Shift key for 8 seconds. This is the shortcut " +
                     "for the Slow Keys feature, which affects the way your keyboard works.");

        } else  if (whatChanged & Clutter.KeyboardA11yFlags.STICKY_KEYS_ENABLED) {
            key = KEY_STICKY_KEYS_ENABLED;
            enabled = (newFlags & Clutter.KeyboardA11yFlags.STICKY_KEYS_ENABLED) ? true : false;
            title = enabled ?
                    _("Sticky Keys Turned On") :
                    _("Sticky Keys Turned Off");
            body = enabled ?
                   _("You just pressed the Shift key 5 times in a row. This is the shortcut " +
                     "for the Sticky Keys feature, which affects the way your keyboard works.") :
                   _("You just pressed two keys at once, or pressed the Shift key 5 times in a row. " +
                     "This turns off the Sticky Keys feature, which affects the way your keyboard works.");
        } else {
            return;
        }

        let icon = new Gio.ThemedIcon({ name: 'preferences-desktop-accessibility-symbolic' });
        let contentParams = { icon, title, body, styleClass: 'access-dialog' };
        let content = new Dialog.MessageDialogContent(contentParams);

        dialog.contentLayout.add_actor(content);

        dialog.addButton({ label: enabled ? _("Leave On") : _("Turn On"),
                           action: () => {
                               this._a11ySettings.set_boolean(key, true);
                               dialog.close();
                           },
                           default: enabled,
                           key: !enabled ? Clutter.Escape : null });

        dialog.addButton({ label: enabled ? _("Turn Off") : _("Leave Off"),
                           action: () => {
                               this._a11ySettings.set_boolean(key, false);
                               dialog.close();
                           },
                           default: !enabled,
                           key: enabled ? Clutter.Escape : null });

        dialog.open();
    }
});