145 lines
4 KiB
TypeScript
145 lines
4 KiB
TypeScript
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/*************************************************************
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*
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* Copyright (c) 2018-2022 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 CommonMfenced wrapper mixin for the MmlMfenced 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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import {CommonInferredMrow} from './mrow.js';
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import {MmlNode, AbstractMmlNode} from '../../../core/MmlTree/MmlNode.js';
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import {MmlMfenced} from '../../../core/MmlTree/MmlNodes/mfenced.js';
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import {BBox} from '../../../util/BBox.js';
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/*****************************************************************/
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/**
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* The CommonMfenced interface
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*/
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export interface CommonMfenced extends AnyWrapper {
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/**
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* An mrow to use for the layout of the mfenced
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*/
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mrow: CommonInferredMrow;
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/**
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* Creates the mrow wrapper to use for the layout
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*/
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createMrow(): void;
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/**
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* Populate the mrow with wrapped mo elements interleaved
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* with the mfenced children (the mo's are already created
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* in the mfenced object)
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*/
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addMrowChildren(): void;
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/**
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* Wrap an mo element and push it onto the mrow
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*
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* @param {MmlNode} node The mo element to push on the mrow
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*/
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addMo(node: MmlNode): void;
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}
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/**
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* Shorthand for the CommonMfenced constructor
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*/
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export type MfencedConstructor = Constructor<CommonMfenced>;
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/*****************************************************************/
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/**
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* The CommonMfenced wrapper mixin for the MmlMfenced 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 CommonMfencedMixin<T extends WrapperConstructor>(Base: T): MfencedConstructor & T {
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return class extends Base {
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/**
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* An mrow to use for the layout of the mfenced
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*/
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public mrow: CommonInferredMrow = null;
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/**
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* @override
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* @constructor
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*/
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constructor(...args: any[]) {
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super(...args);
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this.createMrow();
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this.addMrowChildren();
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}
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/**
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* Creates the mrow wrapper to use for the layout
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*/
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public createMrow() {
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const mmlFactory = (this.node as AbstractMmlNode).factory;
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const mrow = mmlFactory.create('inferredMrow');
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mrow.inheritAttributesFrom(this.node);
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this.mrow = this.wrap(mrow) as CommonInferredMrow;
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this.mrow.parent = this;
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}
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/**
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* Populate the mrow with wrapped mo elements interleaved
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* with the mfenced children (the mo's are already created
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* in the mfenced object)
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*/
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public addMrowChildren() {
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const mfenced = this.node as MmlMfenced;
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const mrow = this.mrow;
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this.addMo(mfenced.open);
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if (this.childNodes.length) {
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mrow.childNodes.push(this.childNodes[0]);
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}
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let i = 0;
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for (const child of this.childNodes.slice(1)) {
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this.addMo(mfenced.separators[i++]);
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mrow.childNodes.push(child);
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}
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this.addMo(mfenced.close);
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mrow.stretchChildren();
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}
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/**
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* Wrap an mo element and push it onto the mrow
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*
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* @param {MmlNode} node The mo element to push on the mrow
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*/
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public addMo(node: MmlNode) {
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if (!node) return;
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const mo = this.wrap(node);
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this.mrow.childNodes.push(mo);
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mo.parent = this.mrow;
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}
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/**
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* @override
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*/
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public computeBBox(bbox: BBox, recompute: boolean = false) {
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bbox.updateFrom(this.mrow.getOuterBBox());
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this.setChildPWidths(recompute);
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}
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};
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}
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