ecmarkup/lib/formatter/text.js

Custom element definitions and core utilities for markup that specifies ECMAScript and related technologies.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.printText = void 0;
const line_builder_1 = require("./line-builder");
const entities = require('../../entities-processed.json');
function isBadNumericReference(codePoint) {
    // https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
    if (
    // NULL character
    !codePoint ||
        // out of range
        codePoint > 0x10ffff ||
        // surrogate
        (0xd800 <= codePoint && codePoint <= 0xdfff) ||
        // noncharacter
        (0xfdd0 <= codePoint && codePoint <= 0xfdef) ||
        (codePoint & 0xfffe) === 0xfffe ||
        // control character (but without exceptions for tab/line feed/form feed/space)
        (0 <= codePoint && codePoint <= 0x1f) ||
        (0x7f <= codePoint && codePoint <= 0x9f)) {
        return true;
    }
    return false;
}
function printText(text, indent) {
    const output = new line_builder_1.LineBuilder(indent);
    if (text === '') {
        return output;
    }
    text = text.replace(/&(?:[a-zA-Z0-9]+|#[Xx]([0-9a-fA-F]+)|#([0-9]+));?/g, (m, hex, decimal) => {
        if (hex || decimal) {
            // pass through bad references,
            // normalize '&' and '<' into named references,
            // and transform everything else
            const codePoint = parseInt(hex || decimal, hex ? 16 : 10);
            if (isBadNumericReference(codePoint)) {
                return m;
            }
            const ch = String.fromCodePoint(codePoint);
            if (/\p{White_Space}|\p{DI}|\p{gc=M}|\p{gc=C}/u.test(ch)) {
                return m;
            }
            if (ch === '&') {
                return '&amp;';
            }
            else if (ch === '<') {
                return '&lt;';
            }
            return ch;
        }
        // entities[m] is null if the entity expands to '&', '<', or a string which has blank/control/etc characters
        if ({}.hasOwnProperty.call(entities, m) && entities[m] !== null) {
            return entities[m];
        }
        const lower = m.toLowerCase();
        if (lower === '&lt;' || lower === '&amp;') {
            return lower;
        }
        else if (lower === '&lt' || lower === '&amp') {
            return lower + ';';
        }
        return m;
    });
    const leadingSpace = text[0] === ' ' || text[0] === '\t';
    const trailingSpace = text[text.length - 1] === ' ' || text[text.length - 1] === '\t';
    const lines = text.split('\n').map(l => l.trim());
    if (leadingSpace) {
        output.appendText(' ');
    }
    if (lines.length === 1) {
        if (lines[0] !== '') {
            output.appendText(lines[0]);
            if (trailingSpace) {
                output.appendText(' ');
            }
        }
        return output;
    }
    for (let i = 0; i < lines.length - 1; ++i) {
        output.appendText(lines[i]);
        output.linebreak();
    }
    output.appendText(lines[lines.length - 1]);
    if (trailingSpace && output.last !== '') {
        output.appendText(' ');
    }
    return output;
}
exports.printText = printText;