extension.js

/* extension.js
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

/* exported init */


const Main = imports.ui.main;
const Meta = imports.gi.Meta;

let signalId = null;

function init() {
  // Initialization code
}

function enable() {
  let topPanel = Main.panel;
  let topMonitor = global.display.get_primary_monitor(); // Get the primary monitor

  // Attach the button-press-event to the top panel
  signalId = topPanel.connect('button-press-event', function (widget, event) {
    // Check if the middle mouse button was clicked
    if (event.get_button() === 2) {
      // Middle mouse click detected

      // Get the stack of windows
      let windows = global.display.get_tab_list(Meta.TabList.NORMAL_ALL, null);
      
      // Find the topmost maximized window on the same monitor as the top panel
      let topmostMaximizedWindow = null;
      let topmostWindowLayer = -1;

      for (let i = 0; i < windows.length; i++) {
        let window = windows[i];

        // Check if the window is maximized and on the same monitor
        if (
          window.maximized_horizontally &&
          window.maximized_vertically &&
          window.get_monitor() === topMonitor
        ) {
          let windowLayer = window.get_layer();
          
          // Check if the window is at the top layer
          if (windowLayer > topmostWindowLayer) {
            topmostMaximizedWindow = window;
            topmostWindowLayer = windowLayer;
          }
        }
      }

      // Hide the topmost maximized window on the same monitor, if found
      if (topmostMaximizedWindow) {
        topmostMaximizedWindow.minimize();
      }
    }
  });
}

function disable() {
  if (signalId) {
    // Disconnect the signal connection if it exists
    Main.panel.disconnect(signalId);
    signalId = null;
  }
}