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counterweight 2026-05-14 10:56:04 +02:00
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node_modules/mathjax-full/ts/output/chtml/Wrappers/mo.ts generated vendored Normal file
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/*************************************************************
*
* 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 CHTMLmo wrapper for the MmlMo object
*
* @author dpvc@mathjax.org (Davide Cervone)
*/
import {CHTMLWrapper, CHTMLConstructor, StringMap} from '../Wrapper.js';
import {CommonMoMixin, DirectionVH} from '../../common/Wrappers/mo.js';
import {MmlMo} from '../../../core/MmlTree/MmlNodes/mo.js';
import {StyleList} from '../../../util/StyleList.js';
import {DIRECTION} from '../FontData.js';
/*****************************************************************/
/**
* The CHTMLmo wrapper for the MmlMo object
*
* @template N The HTMLElement node class
* @template T The Text node class
* @template D The Document class
*/
// @ts-ignore
export class CHTMLmo<N, T, D> extends
CommonMoMixin<CHTMLConstructor<any, any, any>>(CHTMLWrapper) {
/**
* The mo wrapper
*/
public static kind = MmlMo.prototype.kind;
/**
* @override
*/
public static styles: StyleList = {
'mjx-stretchy-h': {
display: 'inline-table',
width: '100%'
},
'mjx-stretchy-h > *': {
display: 'table-cell',
width: 0
},
'mjx-stretchy-h > * > mjx-c': {
display: 'inline-block',
transform: 'scalex(1.0000001)' // improves blink positioning
},
'mjx-stretchy-h > * > mjx-c::before': {
display: 'inline-block',
width: 'initial'
},
'mjx-stretchy-h > mjx-ext': {
'/* IE */ overflow': 'hidden',
'/* others */ overflow': 'clip visible',
width: '100%'
},
'mjx-stretchy-h > mjx-ext > mjx-c::before': {
transform: 'scalex(500)'
},
'mjx-stretchy-h > mjx-ext > mjx-c': {
width: 0
},
'mjx-stretchy-h > mjx-beg > mjx-c': {
'margin-right': '-.1em'
},
'mjx-stretchy-h > mjx-end > mjx-c': {
'margin-left': '-.1em'
},
'mjx-stretchy-v': {
display: 'inline-block'
},
'mjx-stretchy-v > *': {
display: 'block'
},
'mjx-stretchy-v > mjx-beg': {
height: 0
},
'mjx-stretchy-v > mjx-end > mjx-c': {
display: 'block'
},
'mjx-stretchy-v > * > mjx-c': {
transform: 'scaley(1.0000001)', // improves Firefox and blink positioning
'transform-origin': 'left center',
overflow: 'hidden'
},
'mjx-stretchy-v > mjx-ext': {
display: 'block',
height: '100%',
'box-sizing': 'border-box',
border: '0px solid transparent',
'/* IE */ overflow': 'hidden',
'/* others */ overflow': 'visible clip',
},
'mjx-stretchy-v > mjx-ext > mjx-c::before': {
width: 'initial',
'box-sizing': 'border-box'
},
'mjx-stretchy-v > mjx-ext > mjx-c': {
transform: 'scaleY(500) translateY(.075em)',
overflow: 'visible'
},
'mjx-mark': {
display: 'inline-block',
height: '0px'
}
};
/**
* @override
*/
public toCHTML(parent: N) {
const attributes = this.node.attributes;
const symmetric = (attributes.get('symmetric') as boolean) && this.stretch.dir !== DIRECTION.Horizontal;
const stretchy = this.stretch.dir !== DIRECTION.None;
if (stretchy && this.size === null) {
this.getStretchedVariant([]);
}
let chtml = this.standardCHTMLnode(parent);
if (stretchy && this.size < 0) {
this.stretchHTML(chtml);
} else {
if (symmetric || attributes.get('largeop')) {
const u = this.em(this.getCenterOffset());
if (u !== '0') {
this.adaptor.setStyle(chtml, 'verticalAlign', u);
}
}
if (this.node.getProperty('mathaccent')) {
this.adaptor.setStyle(chtml, 'width', '0');
this.adaptor.setStyle(chtml, 'margin-left', this.em(this.getAccentOffset()));
}
for (const child of this.childNodes) {
child.toCHTML(chtml);
}
}
}
/**
* Create the HTML for a multi-character stretchy delimiter
*
* @param {N} chtml The parent element in which to put the delimiter
*/
protected stretchHTML(chtml: N) {
const c = this.getText().codePointAt(0);
this.font.delimUsage.add(c);
this.childNodes[0].markUsed();
const delim = this.stretch;
const stretch = delim.stretch;
const content: N[] = [];
//
// Set up the beginning, extension, and end pieces
//
if (stretch[0]) {
content.push(this.html('mjx-beg', {}, [this.html('mjx-c')]));
}
content.push(this.html('mjx-ext', {}, [this.html('mjx-c')]));
if (stretch.length === 4) {
//
// Braces have a middle and second extensible piece
//
content.push(
this.html('mjx-mid', {}, [this.html('mjx-c')]),
this.html('mjx-ext', {}, [this.html('mjx-c')])
);
}
if (stretch[2]) {
content.push(this.html('mjx-end', {}, [this.html('mjx-c')]));
}
//
// Set the styles needed
//
const styles: StringMap = {};
const {h, d, w} = this.bbox;
if (delim.dir === DIRECTION.Vertical) {
//
// Vertical needs an extra (empty) element to get vertical position right
// in some browsers (e.g., Safari)
//
content.push(this.html('mjx-mark'));
styles.height = this.em(h + d);
styles.verticalAlign = this.em(-d);
} else {
styles.width = this.em(w);
}
//
// Make the main element and add it to the parent
//
const dir = DirectionVH[delim.dir];
const properties = {class: this.char(delim.c || c), style: styles};
const html = this.html('mjx-stretchy-' + dir, properties, content);
this.adaptor.append(chtml, html);
}
}