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

73 lines
2.1 KiB
TypeScript
Raw Permalink Normal View History

2024-10-14 06:09:33 +00:00
/*************************************************************
*
* Copyright (c) 2017-2022 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 CommonTeXAtom wrapper mixin for the MmlTeXAtom object
*
* @author dpvc@mathjax.org (Davide Cervone)
*/
import {AnyWrapper, WrapperConstructor, Constructor} from '../Wrapper.js';
import {BBox} from '../../../util/BBox.js';
import {TEXCLASS} from '../../../core/MmlTree/MmlNode.js';
/*****************************************************************/
/**
* The CommonTeXAtom interface
*/
export interface CommonTeXAtom extends AnyWrapper {
}
/**
* Shorthand for the CommonTeXAtom constructor
*/
export type TeXAtomConstructor = Constructor<CommonTeXAtom>;
/*****************************************************************/
/**
* The CommonTeXAtom wrapper mixin for the TeXAtom object
*
* @template T The Wrapper class constructor type
*/
export function CommonTeXAtomMixin<T extends WrapperConstructor>(Base: T): TeXAtomConstructor & T {
return class extends Base {
/**
* @override
*/
public computeBBox(bbox: BBox, recompute: boolean = false) {
super.computeBBox(bbox, recompute);
if (this.childNodes[0] && this.childNodes[0].bbox.ic) {
bbox.ic = this.childNodes[0].bbox.ic;
}
//
// Center VCENTER atoms vertically
//
if (this.node.texClass === TEXCLASS.VCENTER) {
const {h, d} = bbox;
const a = this.font.params.axis_height;
const dh = ((h + d) / 2 + a) - h; // new height minus old height
bbox.h += dh;
bbox.d -= dh;
}
}
};
}