45 lines
1.7 KiB
JavaScript
45 lines
1.7 KiB
JavaScript
import * as DomUtil from '../common/dom_util.js';
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import { SemanticType } from '../semantic_tree/semantic_meaning.js';
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import { MMLTAGS } from '../semantic_tree/semantic_util.js';
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import { AbstractEnrichCase } from './abstract_enrich_case.js';
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import * as EnrichMathml from './enrich_mathml.js';
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import { setAttributes } from './enrich_attr.js';
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export class CaseLimit extends AbstractEnrichCase {
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static test(semantic) {
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if (!semantic.mathmlTree || !semantic.childNodes.length) {
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return false;
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}
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const mmlTag = DomUtil.tagName(semantic.mathmlTree);
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const type = semantic.type;
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return (((type === SemanticType.LIMUPPER || type === SemanticType.LIMLOWER) &&
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(mmlTag === MMLTAGS.MSUBSUP || mmlTag === MMLTAGS.MUNDEROVER)) ||
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(type === SemanticType.LIMBOTH &&
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(mmlTag === MMLTAGS.MSUB ||
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mmlTag === MMLTAGS.MUNDER ||
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mmlTag === MMLTAGS.MSUP ||
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mmlTag === MMLTAGS.MOVER)));
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}
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static walkTree_(node) {
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if (node) {
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EnrichMathml.walkTree(node);
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}
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}
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constructor(semantic) {
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super(semantic);
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this.mml = semantic.mathmlTree;
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}
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getMathml() {
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const children = this.semantic.childNodes;
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if (this.semantic.type !== SemanticType.LIMBOTH &&
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this.mml.childNodes.length >= 3) {
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this.mml = EnrichMathml.introduceNewLayer([this.mml], this.semantic);
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}
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setAttributes(this.mml, this.semantic);
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if (!children[0].mathmlTree) {
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children[0].mathmlTree = this.semantic.mathmlTree;
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}
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children.forEach(CaseLimit.walkTree_);
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return this.mml;
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}
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}
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