yomichan/ext/js/settings/modal-jquery.js

/*
 * Copyright (C) 2020-2021  Yomichan Authors
 *
 * 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 3 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 <https://www.gnu.org/licenses/>.
 */

class Modal extends EventDispatcher {
    constructor(node) {
        super();
        this._node = node;
        this._eventListeners = new EventListenerCollection();
    }

    get node() {
        return this._node;
    }

    prepare() {
        // NOP
    }

    isVisible() {
        return !!(this._getWrappedNode().data('bs.modal') || {}).isShown;
    }

    setVisible(value) {
        this._getWrappedNode().modal(value ? 'show' : 'hide');
    }

    on(eventName, callback) {
        if (eventName === 'visibilityChanged') {
            if (this._eventListeners.size === 0) {
                const wrappedNode = this._getWrappedNode();
                this._eventListeners.on(wrappedNode, 'hidden.bs.modal', this._onModalHide.bind(this));
                this._eventListeners.on(wrappedNode, 'shown.bs.modal', this._onModalShow.bind(this));
            }
        }
        return super.on(eventName, callback);
    }

    off(eventName, callback) {
        const result = super.off(eventName, callback);
        if (eventName === 'visibilityChanged' && !this.hasListeners(eventName)) {
            this._eventListeners.removeAllEventListeners();
        }
        return result;
    }

    // Private

    _onModalHide() {
        this.trigger('visibilityChanged', {visible: false});
    }

    _onModalShow() {
        this.trigger('visibilityChanged', {visible: true});
    }

    _getWrappedNode() {
        return $(this._node);
    }
}