57 lines
1.5 KiB
JavaScript
57 lines
1.5 KiB
JavaScript
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import mdx from 'remark-mdx';
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import parse from 'remark-parse';
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import {unified} from 'unified';
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import {visitParents as visit} from 'unist-util-visit-parents';
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const parser = unified().use(parse).use(mdx);
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function computeParams(ancestors) {
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const params = {};
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for (let i = ancestors.length - 1; i >= 0; --i) {
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const {dialogue} = ancestors[i];
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if (dialogue) {
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if (!(dialogue.name in params)) {
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params[dialogue.name] = dialogue.params;
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}
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}
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}
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return params;
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}
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export function parseLetters(source) {
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const tree = parser.parse(source);
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tree.dialogue = {
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name: 'rate',
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params: {frequency: 0.05, length: 0},
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};
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const letters = [];
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visit(tree, (node, ancestors) => {
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switch (node.type) {
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case 'mdxJsxFlowElement':
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case 'mdxJsxTextElement': {
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node.dialogue = {name: node.name, params: {length: 0}};
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for (const {name, value: {value}} of node.attributes) {
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node.dialogue.params[name] = value;
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}
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break;
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}
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case 'text': {
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const params = computeParams(ancestors);
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const split = node.value.split('');
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for (let i = 0; i < split.length; ++i) {
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const indices = {};
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for (const name in params) {
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indices[name] = i + params[name].length;
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}
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letters.push({character: split[i], indices, params});
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}
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for (const name in params) {
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params[name].length += split.length;
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}
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break;
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}
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}
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});
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return letters;
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}
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