135 lines
4.7 KiB
JavaScript
135 lines
4.7 KiB
JavaScript
/*
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* Copyright (C) 2020 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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class Modal extends EventDispatcher {
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constructor(node) {
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super();
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this._node = node;
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this._eventListeners = new EventListenerCollection();
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this._mutationObserver = null;
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this._visible = false;
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this._visibleClassName = 'modal-container-open';
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this._openingClassName = 'modal-container-opening';
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this._closingClassName = 'modal-container-closing';
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this._closingAnimationDuration = 375; // Milliseconds; includes buffer
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this._closeTimer = null;
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}
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get node() {
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return this._node;
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}
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isVisible() {
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if (this._useJqueryModal()) {
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return !!(this._getWrappedNode().data('bs.modal') || {}).isShown;
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} else {
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return this._node.classList.contains(this._visibleClassName);
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}
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}
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setVisible(value) {
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value = !!value;
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if (this._useJqueryModal()) {
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this._getWrappedNode().modal(value ? 'show' : 'hide');
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} else {
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const {classList} = this._node;
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if (classList.contains(this._visibleClassName) === value) { return; }
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if (this._closeTimer !== null) {
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clearTimeout(this._closeTimer);
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this._closeTimer = null;
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}
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if (value) {
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classList.add(this._openingClassName);
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getComputedStyle(this._node).getPropertyValue('display'); // Force update of CSS display property, allowing animation
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classList.add(this._visibleClassName);
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classList.remove(this._closingClassName);
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classList.remove(this._openingClassName);
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this._node.focus();
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} else {
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classList.add(this._closingClassName);
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classList.remove(this._visibleClassName);
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this._closeTimer = setTimeout(() => {
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this._closeTimer = null;
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classList.remove(this._closingClassName);
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}, this._closingAnimationDuration);
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}
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}
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}
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on(eventName, callback) {
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if (eventName === 'visibilityChanged') {
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if (this._useJqueryModal()) {
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if (this._eventListeners.size === 0) {
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const wrappedNode = this._getWrappedNode();
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this._eventListeners.on(wrappedNode, 'hidden.bs.modal', this._onModalHide.bind(this));
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this._eventListeners.on(wrappedNode, 'shown.bs.modal', this._onModalShow.bind(this));
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}
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} else {
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if (this._mutationObserver === null) {
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this._visible = this._node.classList.contains(this._visibleClassName);
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this._mutationObserver = new MutationObserver(this._onMutation.bind(this));
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this._mutationObserver.observe(this._node, {
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attributes: true,
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attributeFilter: ['class'],
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attributeOldValue: true
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});
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}
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}
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}
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return super.on(eventName, callback);
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}
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off(eventName, callback) {
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const result = super.off(eventName, callback);
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if (eventName === 'visibilityChanged' && !this.hasListeners(eventName)) {
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if (this._mutationObserver !== null) {
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this._mutationObserver.disconnect();
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this._mutationObserver = null;
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}
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this._eventListeners.removeAllEventListeners();
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}
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return result;
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}
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// Private
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_onModalHide() {
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this.trigger('visibilityChanged', {visible: false});
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}
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_onModalShow() {
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this.trigger('visibilityChanged', {visible: true});
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}
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_onMutation() {
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const visible = this._node.classList.contains(this._visibleClassName);
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if (this._visible === visible) { return; }
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this._visible = visible;
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this.trigger('visibilityChanged', {visible});
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}
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_useJqueryModal() {
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return (typeof jQuery !== 'undefined');
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}
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_getWrappedNode() {
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return $(this._node);
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}
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}
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