119 lines
4 KiB
TypeScript
119 lines
4 KiB
TypeScript
/*************************************************************
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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 a base class for CHTMLmsubsup, CHTMLmunderover
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* and their relatives. (Since munderover can become msubsup
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* when movablelimits is set, munderover needs to be able to
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* do the same thing as msubsup in some cases.)
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*
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* @author dpvc@mathjax.org (Davide Cervone)
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*/
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import {CHTMLWrapper, CHTMLConstructor} from '../Wrapper.js';
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import {CommonScriptbaseMixin} from '../../common/Wrappers/scriptbase.js';
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import {BBox} from '../../../util/BBox.js';
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import {StyleData} from '../../../util/StyleList.js';
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/*****************************************************************/
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/**
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* A base class for msup/msub/msubsup and munder/mover/munderover
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* wrapper implementations
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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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// @ts-ignore
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export class CHTMLscriptbase<N, T, D> extends
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CommonScriptbaseMixin<CHTMLWrapper<any, any, any>, CHTMLConstructor<any, any, any>>(CHTMLWrapper) {
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/**
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* The scriptbase wrapper
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*/
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public static kind = 'scriptbase';
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/**
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* This gives the common output for msub and msup. It is overridden
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* for all the others (msubsup, munder, mover, munderover).
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*
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* @override
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*/
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public toCHTML(parent: N) {
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this.chtml = this.standardCHTMLnode(parent);
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const [x, v] = this.getOffset();
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const dx = x - (this.baseRemoveIc ? this.baseIc : 0);
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const style: StyleData = {'vertical-align': this.em(v)};
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if (dx) {
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style['margin-left'] = this.em(dx);
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}
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this.baseChild.toCHTML(this.chtml);
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this.scriptChild.toCHTML(this.adaptor.append(this.chtml, this.html('mjx-script', {style})) as N);
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}
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/**
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* @param {N[]} nodes The HTML elements to be centered in a stack
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* @param {number[]} dx The x offsets needed to center the elements
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*/
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protected setDeltaW(nodes: N[], dx: number[]) {
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for (let i = 0; i < dx.length; i++) {
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if (dx[i]) {
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this.adaptor.setStyle(nodes[i], 'paddingLeft', this.em(dx[i]));
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}
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}
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}
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/**
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* @param {N} over The HTML element for the overscript
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* @param {BBox} overbox The bbox for the overscript
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*/
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protected adjustOverDepth(over: N, overbox: BBox) {
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if (overbox.d >= 0) return;
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this.adaptor.setStyle(over, 'marginBottom', this.em(overbox.d * overbox.rscale));
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}
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/**
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* @param {N} under The HTML element for the underscript
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* @param {BBox} underbox The bbox for the underscript
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*/
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protected adjustUnderDepth(under: N, underbox: BBox) {
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if (underbox.d >= 0) return;
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const adaptor = this.adaptor;
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const v = this.em(underbox.d);
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const box = this.html('mjx-box', {style: {'margin-bottom': v, 'vertical-align': v}});
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for (const child of adaptor.childNodes(adaptor.firstChild(under) as N) as N[]) {
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adaptor.append(box, child);
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}
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adaptor.append(adaptor.firstChild(under) as N, box);
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}
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/**
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* @param {N} base The HTML element for the base
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* @param {BBox} basebox The bbox for the base
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*/
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protected adjustBaseHeight(base: N, basebox: BBox) {
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if (this.node.attributes.get('accent')) {
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const minH = this.font.params.x_height * basebox.scale;
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if (basebox.h < minH) {
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this.adaptor.setStyle(base, 'paddingTop', this.em(minH - basebox.h));
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basebox.h = minH;
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}
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}
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}
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}
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