site/node_modules/mathjax-full/ts/output/svg/Wrappers/TeXAtom.ts

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/*************************************************************
*
* Copyright (c) 2018-2022 The MathJax Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Implements the SVGTeXAtom wrapper for the MmlTeXAtom object
*
* @author dpvc@mathjax.org (Davide Cervone)
*/
import {SVGWrapper, SVGConstructor} from '../Wrapper.js';
import {CommonTeXAtomMixin} from '../../common/Wrappers/TeXAtom.js';
import {TeXAtom} from '../../../core/MmlTree/MmlNodes/TeXAtom.js';
import {TEXCLASS, TEXCLASSNAMES} from '../../../core/MmlTree/MmlNode.js';
/*****************************************************************/
/**
* The SVGTeXAtom wrapper for the TeXAtom object
*
* @template N The HTMLElement node class
* @template T The Text node class
* @template D The Document class
*/
// @ts-ignore
export class SVGTeXAtom<N, T, D> extends
CommonTeXAtomMixin<SVGConstructor<any, any, any>>(SVGWrapper) {
/**
* The TeXAtom wrapper
*/
public static kind = TeXAtom.prototype.kind;
/**
* @override
*/
public toSVG(parent: N) {
super.toSVG(parent);
this.adaptor.setAttribute(this.element, 'data-mjx-texclass', TEXCLASSNAMES[this.node.texClass]);
//
// Center VCENTER atoms vertically
//
if (this.node.texClass === TEXCLASS.VCENTER) {
const bbox = this.childNodes[0].getBBox(); // get unmodified bbox of children
const {h, d} = bbox;
const a = this.font.params.axis_height;
const dh = ((h + d) / 2 + a) - h; // new height minus old height
const translate = 'translate(0 ' + this.fixed(dh) + ')';
this.adaptor.setAttribute(this.element, 'transform', translate);
}
}
}