usfm/lib/parser.js

A [USFM](http://paratext.org/about/usfm) parser for JavaScript (written in TypeScript).

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const arrify = require("arrify");
const pratt_1 = require("pratt");
function single(parser, bp, type) {
    parser.builder()
        .nud(type, bp, (t, bp) => [{ type }])
        .led(type, bp, (left, t, bp) => left.concat({ type }));
}
function value(parser, lex, bp, type) {
    const builder = parser.builder();
    builder.nud(type, bp, (t, bp) => [{ [type]: parser.parse(bp) }]);
    builder.led(type, bp, (left, t, bp) => left.concat({ [type]: parser.parse(bp) }));
}
function enclosed(parser, lex, bp, opener, closer = `${opener}*`, type = opener) {
    parser.builder()
        .bp(closer, -1)
        .either(opener, bp, (left, t, bp) => {
        const value = parser.parse(bp);
        lex.expect(closer);
        return arrify(left).concat({ type: opener, value });
    });
}
class UsfmParser extends pratt_1.Parser {
    constructor(lex) {
        super(lex);
        const builder = this.builder();
        builder.bp('$EOF', -1);
        builder.nud('TEXT', Number.MAX_VALUE, (t, bp) => [t.match.replace(/(^(\r?\n)+|(\r?\n)+$)/g, '')]);
        builder.led('TEXT', Number.MAX_VALUE, (left, t, bp) => left.concat(t.match.replace(/(^(\r?\n)+|(\r?\n)+$)/g, '')));
        let BP = 10;
        BP += 10;
        builder.led('c', BP, (left, t, bp) => {
            const num = parseInt(lex.expect('TEXT').match.trim());
            const content = this.parse(bp);
            return left.concat({ type: 'c', num, content });
        });
        BP += 10;
        builder.led('v', BP, (left, t, bp) => {
            const text = lex.peek().match;
            const num = /^\s*(\d+)\s*/.exec(text);
            lex.lexer.position += num[0].length;
            return left.concat({ type: 'v', num: parseInt(num[1]), value: this.parse(bp) });
        });
        BP += 10;
        single(this, BP, 'b');
        single(this, BP, 'li1');
        single(this, BP, 'm');
        single(this, BP, 'mi');
        single(this, BP, 'nb');
        single(this, BP, 'p');
        single(this, BP, 'pc');
        single(this, BP, 'pi1');
        single(this, BP, 'q1');
        single(this, BP, 'q2');
        value(this, lex, BP, 'cl');
        value(this, lex, BP, 'cp');
        value(this, lex, BP, 'd');
        value(this, lex, BP, 'h');
        value(this, lex, BP, 'id');
        value(this, lex, BP, 'ide');
        value(this, lex, BP, 'ili');
        value(this, lex, BP, 'ili2');
        value(this, lex, BP, 'ip');
        value(this, lex, BP, 'is1');
        value(this, lex, BP, 'ms1');
        value(this, lex, BP, 'mt1');
        value(this, lex, BP, 'mt2');
        value(this, lex, BP, 'mt3');
        value(this, lex, BP, 's1');
        value(this, lex, BP, 'sp');
        value(this, lex, BP, 'toc1');
        value(this, lex, BP, 'toc2');
        value(this, lex, BP, 'toc3');
        BP += 10;
        enclosed(this, lex, BP, 'add');
        enclosed(this, lex, BP, 'bk');
        enclosed(this, lex, BP, 'f');
        enclosed(this, lex, BP, 'k');
        enclosed(this, lex, BP, 'qs');
        enclosed(this, lex, BP, 'wj');
        enclosed(this, lex, BP, 'x');
        BP += 10;
        enclosed(this, lex, BP, '+bk', '+bk*', 'bk');
        value(this, lex, BP, 'fl');
        value(this, lex, BP, 'fq');
        value(this, lex, BP, 'fr');
        value(this, lex, BP, 'ft');
        value(this, lex, BP, 'fqa');
        value(this, lex, BP, 'xo');
        value(this, lex, BP, 'xt');
    }
}
exports.UsfmParser = UsfmParser;
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