extension.js

// SwitchFocusMode extension (c) 2014 Romano Giannetti <[email protected]>
// License: GPLv2+, see http://www.gnu.org/licenses/gpl-2.0.txt
//
// Configuration: choose the kind of FFM you like, be "sloppy" or "mouse"
const FFM_VARIANT='sloppy';

// End configuration
const St = imports.gi.St;
const Main = imports.ui.main;
const Tweener = imports.ui.tweener;
const ExtensionUtils = imports.misc.extensionUtils;
const Me = imports.misc.extensionUtils.getCurrentExtension();
const {Gio, Shell, Meta} = imports.gi;

let text, button, icon_f, icon_c, wm_prefs;

function getSettings() {
  let GioSSS = Gio.SettingsSchemaSource;
  let schemaSource = GioSSS.new_from_directory(
    Me.dir.get_child("schemas").get_path(),
    GioSSS.get_default(),
    false
  );
  let schemaObj = schemaSource.lookup(
  'org.gnome.shell.extensions.switchfocustype', true);
  if (!schemaObj) {
  throw new Error('cannot find schemas');
  }
  return new Gio.Settings({ settings_schema : schemaObj });
  }

function _hideMsg() {
    if (text) {
        Main.uiGroup.remove_actor(text);
        text = null;
    }
}

function _showMsg(what) {
    _hideMsg(); // in case it's still linging there
    if (!text) {
        text = new St.Label({ style_class: 'msg-label', text: what });
        Main.uiGroup.add_actor(text);
    }

    text.opacity = 255;
    let monitor = Main.layoutManager.primaryMonitor;
    text.set_position(Math.floor(monitor.width / 2 - text.width / 2),
            Math.floor(monitor.height / 2 - text.height / 2));
    Tweener.addTween(text,
            { opacity: 0,
                time: 3,
        transition: 'easeOutQuad',
        onComplete: _hideMsg });
}

function _switch() {
    let what=wm_prefs.get_string('focus-mode');
    if (what == 'click') {
        _showMsg("Setting Focus-follow-mouse");
        button.set_child(icon_f);
        wm_prefs.set_string('focus-mode', FFM_VARIANT);
    } else { // sloppy or mouse
        _showMsg("Setting Click-to-focus");
        button.set_child(icon_c);
        wm_prefs.set_string('focus-mode', 'click');
    }
}

function _sync() {
    let what=wm_prefs.get_string('focus-mode');
    if (what == 'click') {
        button.set_child(icon_c);
    } else { // sloppy or mouse
        button.set_child(icon_f);
    }
}

function init() {
    button = new St.Bin({ style_class: 'panel-button',
        reactive: true,
            can_focus: true,
            x_fill: true,
            y_fill: false,
            track_hover: true });
    icon_f = new St.Icon({ style_class: 'system-status-icon' });
    icon_f.gicon = Gio.icon_new_for_string(Me.path + '/icons/fmode.svg');
    icon_c = new St.Icon({ style_class: 'system-status-icon' });
    icon_c.gicon = Gio.icon_new_for_string(Me.path + '/icons/cmode.svg');
    wm_prefs=new Gio.Settings({schema: 'org.gnome.desktop.wm.preferences'});
    button.connect('button-press-event', _switch);
}

function enable() {
    // start with the current mode --- sync icon
    _sync();
    Main.panel._rightBox.insert_child_at_index(button, 0);

  let mode = Shell.ActionMode.All;

  let flag = Meta.KeyBindingFlags.NONE;

  let settings = getSettings();

  Main.wm.addKeybinding("my-shortcut", settings, flag, mode, () => {
    log('shortcut is working');
  });
}

function disable() {
    Main.panel._rightBox.remove_child(button);
    Main.wm.removeKeybinding("my-shortcut");
}