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45 lines
1.1 KiB
45 lines
1.1 KiB
2 years ago
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"use strict";
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const htmlparser = require("htmlparser2");
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const jsTokens = require("js-tokens");
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const OPEN_BRACE = "{".charCodeAt(0);
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module.exports = class JsxLikeTokenizer extends htmlparser.Tokenizer {
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stateBeforeAttributeValue(c) {
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if (c === OPEN_BRACE) {
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const startIndex = this.index;
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const endIndex = getIndexOfExpressionEnd(this.buffer, startIndex + 1);
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if (endIndex != null) {
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this.sectionStart = startIndex;
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this.index = endIndex + 1;
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this.cbs.onattribdata(this.sectionStart, this.index);
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this.sectionStart = -1;
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this.cbs.onattribend(1 /* QuoteType.Unquoted */, this.index);
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this.state = 8 /* BeforeAttributeName */;
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this.stateBeforeAttributeName(this.buffer.charCodeAt(this.index));
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return;
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}
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}
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super.stateBeforeAttributeValue(c);
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}
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};
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function getIndexOfExpressionEnd(source, startIndex) {
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let index = startIndex;
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let braceStack = 0;
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for (const token of jsTokens(source.slice(startIndex))) {
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if (token.value === "}") {
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if (braceStack === 0) {
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return index;
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}
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braceStack--;
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} else if (token.value === "{") {
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braceStack++;
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}
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index += token.value.length;
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}
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return null;
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}
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