/**
 * Copyright (c) 2011-2018 by Andrew Mustun. All rights reserved.
 * 
 * This file is part of the QCAD project.
 *
 * QCAD 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 3 of the License, or
 * (at your option) any later version.
 *
 * QCAD 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 QCAD.
 */

include("scripts/Layer/Layer.js");
 
/**
 * \class ToggleLayerVisibility
 * \ingroup ecma_layer
 * \brief Toggle layer visibility.
 */
function ToggleLayerVisibility(guiAction) {
    Layer.call(this, guiAction);
}

ToggleLayerVisibility.prototype = new Layer();

ToggleLayerVisibility.prototype.beginEvent = function() {
    Layer.prototype.beginEvent.call(this);

    var layer = this.getCurrentLayer();

    var showFrozen = Layer.getShowFrozen();
    var freezeLayer = Layer.getFreezeLayer();

    // separate column for frozen is shown:
    // always toggle off:
    if (showFrozen) {
        layer.setOff(!layer.isOff());
    }
    else {
        // freeze layers:
        if (freezeLayer) {
            if (!layer.isFrozen() && !layer.isOff()) {
                layer.setFrozen(true);
            }
            else {
                layer.setFrozen(false);
                layer.setOff(false);
            }
        }

        // never freeze layers:
        else {
            layer.setFrozen(false);
            layer.setOff(!layer.isOff());
        }
    }

    var operation = new RModifyObjectOperation(layer);
    var di = this.getDocumentInterface();
    di.applyOperation(operation);

    this.terminate();
};

