65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
'use strict';
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var events = require('events');
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var Element = require('./Element.js');
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var ltx = require('./parsers/ltx.js');
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class Parser extends events.EventEmitter {
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constructor(options) {
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super();
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const ParserInterface = (this.Parser =
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(options && options.Parser) || this.DefaultParser);
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const ElementInterface = (this.Element =
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(options && options.Element) || this.DefaultElement);
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this.parser = new ParserInterface();
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let el;
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this.parser.on("startElement", (name, attrs) => {
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const child = new ElementInterface(name, attrs);
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el = !el ? child : el.cnode(child);
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});
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this.parser.on("endElement", (name) => {
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if (!el) ; else if (name === el.name) {
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if (el.parent) {
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el = el.parent;
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} else if (!this.tree) {
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this.tree = el;
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el = undefined;
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}
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}
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});
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this.parser.on("text", (str) => {
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if (el) {
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el.t(str);
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}
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});
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this.parser.on("error", (e) => {
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this.error = e;
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this.emit("error", e);
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});
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}
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write(data) {
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this.parser.write(data);
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}
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end(data) {
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this.parser.end(data);
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if (!this.error) {
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if (this.tree) {
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this.emit("tree", this.tree);
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} else {
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this.emit("error", new Error("Incomplete document"));
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}
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}
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}
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}
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Parser.prototype.DefaultParser = ltx;
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Parser.prototype.DefaultElement = Element;
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module.exports = Parser;
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