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/* -*- mode: js; js-basic-offset: 4; indent-tabs-mode: nil -*- */

const Clutter = imports.gi.Clutter;
const Lang = imports.lang;
const Meta = imports.gi.Meta;
const Shell = imports.gi.Shell;

const AltTab = imports.ui.altTab;
const Main = imports.ui.main;
const WindowManager = imports.ui.windowManager;

let injections = {};

function init(metadata) {
}

function setKeybinding(name, func) {
    Main.wm.setCustomKeybindingHandler(name, Shell.ActionMode.NORMAL, func);
}

function enable() {
    injections['_keyPressHandler'] = AltTab.WindowSwitcherPopup.prototype._keyPressHandler;
    AltTab.WindowSwitcherPopup.prototype._keyPressHandler = function(keysym, action) {
        switch(action) {
            case Meta.KeyBindingAction.SWITCH_APPLICATIONS:
            case Meta.KeyBindingAction.SWITCH_GROUP:
              action = Meta.KeyBindingAction.SWITCH_WINDOWS;
              break;
            case Meta.KeyBindingAction.SWITCH_APPLICATIONS_BACKWARD:
            case Meta.KeyBindingAction.SWITCH_GROUP_BACKWARD:
              action = Meta.KeyBindingAction.SWITCH_WINDOWS_BACKWARD;
              break;
        }
        return injections['_keyPressHandler'].call(this, keysym, action);
    };

    Main.wm._forcedWindowSwitcher = function(display, screen, window, binding) {
        /* prevent a corner case where both popups show up at once */
        if (this._workspaceSwitcherPopup != null)
            this._workspaceSwitcherPopup.destroy();

        let tabPopup = new AltTab.WindowSwitcherPopup();

        if (!tabPopup.show(binding.is_reversed(), binding.get_name(), binding.get_mask()))
            tabPopup.destroy();
    };

    setKeybinding('switch-applications', Lang.bind(Main.wm, Main.wm._forcedWindowSwitcher));
    setKeybinding('switch-group', Lang.bind(Main.wm, Main.wm._forcedWindowSwitcher));
    setKeybinding('switch-applications-backward', Lang.bind(Main.wm, Main.wm._forcedWindowSwitcher));
    setKeybinding('switch-group-backward', Lang.bind(Main.wm, Main.wm._forcedWindowSwitcher));
}

function disable() {
    var prop;

    setKeybinding('switch-applications', Lang.bind(Main.wm, Main.wm._startSwitcher));
    setKeybinding('switch-group', Lang.bind(Main.wm, Main.wm._startSwitcher));
    setKeybinding('switch-applications-backward', Lang.bind(Main.wm, Main.wm._startSwitcher));
    setKeybinding('switch-group-backward', Lang.bind(Main.wm, Main.wm._startSwitcher));

    for (prop in injections)
        AltTab.WindowSwitcherPopup.prototype[prop] = injections[prop];
    delete Main.wm._forcedWindowSwitcher;
}