open windows search provider

metadata.json

{
    "description": "Searches open windows", 
    "uuid": "open-windows@exor", 
    "name": "Open Windows Search Provider"
}

search_provider.js

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

const TRACKER = Cinnamon.WindowTracker.get_default();
const DEFAULT_ICON = new St.Icon({ icon_name: 'application-default-icon', icon_type: St.IconType.FULLCOLOR, icon_size: 16 });

function perform_search(pattern){
    let results = [];
    let windows = global.display.list_windows(Meta.ListWindowsFlags.DEFAULT);
    pattern = pattern.toLowerCase();

    for (let i = 0; i < windows.length; i++) {
        if (Main.isInteresting(windows[i]) 
            && typeof windows[i].title === "string"
            && windows[i].title.toLowerCase().indexOf(pattern) >= 0) {

            let window_app = TRACKER.get_window_app(windows[i]);
            let cur_result = {type: "window",
                              label: _("Open Window: %s").format(windows[i].title),
                              metaWindow: windows[i]};
            if (window_app)
                cur_result.icon_app = window_app;
            else
                cur_result.icon = DEFAULT_ICON;

            results.push(cur_result);
        }
    }

    send_results(results);
}

function on_result_selected(result) {
    result.metaWindow.activate(global.get_current_time());
}