87 lines
3 KiB
TypeScript
87 lines
3 KiB
TypeScript
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/*************************************************************
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*
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* Copyright (c) 2019-2022 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 CommonMtext wrapper mixin for the MmlMtext object
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*
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* @author dpvc@mathjax.org (Davide Cervone)
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*/
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import {AnyWrapper, WrapperConstructor, Constructor} from '../Wrapper.js';
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/*****************************************************************/
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/**
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* The CommonMtext interface
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*/
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export interface CommonMtext extends AnyWrapper {
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}
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/**
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* Shorthand for the CommonMtext constructor
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*/
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export type MtextConstructor = Constructor<CommonMtext>;
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/*****************************************************************/
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/**
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* The CommonMtext wrapper mixin for the MmlMtext object
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*
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* @template T The Wrapper class constructor type
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*/
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export function CommonMtextMixin<T extends WrapperConstructor>(Base: T): MtextConstructor & T {
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return class extends Base {
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/**
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* The font-family, weight, and style to use for the variants when mtextInheritFont
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* is true or mtextFont is specified. If not in this list, then the font's
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* getCssFont() is called. When the font family is not specified (as in these four),
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* the inherited or specified font is used.
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*/
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public static INHERITFONTS = {
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normal: ['', false, false],
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bold: ['', false, true],
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italic: ['', true, false],
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'bold-italic': ['', true, true]
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};
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/**
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* @override
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*/
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protected getVariant() {
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const options = this.jax.options;
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const data = this.jax.math.outputData;
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//
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// If the font is to be inherited from the surrounding text, check the mathvariant
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// and see if it allows for inheritance. If so, set the variant appropriately,
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// otherwise get the usual variant.
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//
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const merror = ((!!data.merrorFamily || !!options.merrorFont) && this.node.Parent.isKind('merror'));
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if (!!data.mtextFamily || !!options.mtextFont || merror) {
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const variant = this.node.attributes.get('mathvariant') as string;
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const font = (this.constructor as any).INHERITFONTS[variant] || this.jax.font.getCssFont(variant);
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const family = font[0] || (merror ? data.merrorFamily || options.merrorFont :
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data.mtextFamily || options.mtextFont);
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this.variant = this.explicitVariant(family, font[2] ? 'bold' : '', font[1] ? 'italic' : '');
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return;
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}
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super.getVariant();
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}
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};
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}
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