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/*
* Copyright (C) 2020 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();
this._mutationObserver = null;
this._visible = false;
this._visibleClassName = 'modal-container-open';
}
get node() {
return this._node;
}
setVisible(value) {
if (this._useJqueryModal()) {
this._getWrappedNode().modal(value ? 'show' : 'hide');
} else {
this._node.classList.toggle(this._visibleClassName, value);
}
}
on(eventName, callback) {
if (eventName === 'visibilityChanged') {
if (this._useJqueryModal()) {
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));
}
} else {
if (this._mutationObserver === null) {
this._visible = this._node.classList.contains(this._visibleClassName);
this._mutationObserver = new MutationObserver(this._onMutation.bind(this));
this._mutationObserver.observe(this._node, {
attributes: true,
attributeFilter: ['class'],
attributeOldValue: true
});
}
}
}
return super.on(eventName, callback);
}
off(eventName, callback) {
const result = super.off(eventName, callback);
if (eventName === 'visibilityChanged' && !this.hasListeners(eventName)) {
if (this._mutationObserver !== null) {
this._mutationObserver.disconnect();
this._mutationObserver = null;
}
this._eventListeners.removeAllEventListeners();
}
return result;
}
// Private
_onModalHide() {
this.trigger('visibilityChanged', {visible: false});
}
_onModalShow() {
this.trigger('visibilityChanged', {visible: true});
}
_onMutation() {
const visible = this._node.classList.contains(this._visibleClassName);
if (this._visible === visible) { return; }
this._visible = visible;
this.trigger('visibilityChanged', {visible: false});
}
_useJqueryModal() {
return (typeof jQuery !== 'undefined');
}
_getWrappedNode() {
return $(this._node);
}
}
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