87 lines
2.6 KiB
TypeScript
87 lines
2.6 KiB
TypeScript
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/*************************************************************
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*
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* Copyright (c) 2017-2022 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Implements the HTMLHandler class
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*
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* @author dpvc@mathjax.org (Davide Cervone)
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*/
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import {AbstractHandler} from '../../core/Handler.js';
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import {MinHTMLAdaptor} from '../../adaptors/HTMLAdaptor.js';
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import {HTMLDocument} from './HTMLDocument.js';
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import {OptionList} from '../../util/Options.js';
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/*****************************************************************/
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/**
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* Implements the HTMLHandler class (extends AbstractHandler)
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*
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* @template N The HTMLElement node class
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* @template T The Text node class
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* @template D The Document class
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*/
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export class HTMLHandler<N, T, D> extends AbstractHandler<N, T, D> {
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/**
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* The DOMAdaptor for the document being handled
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*/
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public adaptor: MinHTMLAdaptor<N, T, D>; // declare a more specific adaptor type
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/**
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* @override
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*/
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public documentClass = HTMLDocument;
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/**
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* @override
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*/
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public handlesDocument(document: any) {
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const adaptor = this.adaptor;
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if (typeof(document) === 'string') {
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try {
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document = adaptor.parse(document, 'text/html');
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} catch (err) {}
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}
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if (document instanceof adaptor.window.Document ||
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document instanceof adaptor.window.HTMLElement ||
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document instanceof adaptor.window.DocumentFragment) {
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return true;
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}
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return false;
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}
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/**
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* If the document isn't already a Document object, create one
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* using the given data
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*
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* @override
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*/
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public create(document: any, options: OptionList) {
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const adaptor = this.adaptor;
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if (typeof(document) === 'string') {
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document = adaptor.parse(document, 'text/html');
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} else if (document instanceof adaptor.window.HTMLElement ||
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document instanceof adaptor.window.DocumentFragment) {
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let child = document as N;
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document = adaptor.parse('', 'text/html');
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adaptor.append(adaptor.body(document), child);
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}
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return super.create(document, options) as HTMLDocument<N, T, D>;
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}
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}
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