xterm/lib/CharWidth.js

Full xterm terminal, in your browser

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.wcwidth = (function (opts) {
    var COMBINING_BMP = [
        [0x0300, 0x036F], [0x0483, 0x0486], [0x0488, 0x0489],
        [0x0591, 0x05BD], [0x05BF, 0x05BF], [0x05C1, 0x05C2],
        [0x05C4, 0x05C5], [0x05C7, 0x05C7], [0x0600, 0x0603],
        [0x0610, 0x0615], [0x064B, 0x065E], [0x0670, 0x0670],
        [0x06D6, 0x06E4], [0x06E7, 0x06E8], [0x06EA, 0x06ED],
        [0x070F, 0x070F], [0x0711, 0x0711], [0x0730, 0x074A],
        [0x07A6, 0x07B0], [0x07EB, 0x07F3], [0x0901, 0x0902],
        [0x093C, 0x093C], [0x0941, 0x0948], [0x094D, 0x094D],
        [0x0951, 0x0954], [0x0962, 0x0963], [0x0981, 0x0981],
        [0x09BC, 0x09BC], [0x09C1, 0x09C4], [0x09CD, 0x09CD],
        [0x09E2, 0x09E3], [0x0A01, 0x0A02], [0x0A3C, 0x0A3C],
        [0x0A41, 0x0A42], [0x0A47, 0x0A48], [0x0A4B, 0x0A4D],
        [0x0A70, 0x0A71], [0x0A81, 0x0A82], [0x0ABC, 0x0ABC],
        [0x0AC1, 0x0AC5], [0x0AC7, 0x0AC8], [0x0ACD, 0x0ACD],
        [0x0AE2, 0x0AE3], [0x0B01, 0x0B01], [0x0B3C, 0x0B3C],
        [0x0B3F, 0x0B3F], [0x0B41, 0x0B43], [0x0B4D, 0x0B4D],
        [0x0B56, 0x0B56], [0x0B82, 0x0B82], [0x0BC0, 0x0BC0],
        [0x0BCD, 0x0BCD], [0x0C3E, 0x0C40], [0x0C46, 0x0C48],
        [0x0C4A, 0x0C4D], [0x0C55, 0x0C56], [0x0CBC, 0x0CBC],
        [0x0CBF, 0x0CBF], [0x0CC6, 0x0CC6], [0x0CCC, 0x0CCD],
        [0x0CE2, 0x0CE3], [0x0D41, 0x0D43], [0x0D4D, 0x0D4D],
        [0x0DCA, 0x0DCA], [0x0DD2, 0x0DD4], [0x0DD6, 0x0DD6],
        [0x0E31, 0x0E31], [0x0E34, 0x0E3A], [0x0E47, 0x0E4E],
        [0x0EB1, 0x0EB1], [0x0EB4, 0x0EB9], [0x0EBB, 0x0EBC],
        [0x0EC8, 0x0ECD], [0x0F18, 0x0F19], [0x0F35, 0x0F35],
        [0x0F37, 0x0F37], [0x0F39, 0x0F39], [0x0F71, 0x0F7E],
        [0x0F80, 0x0F84], [0x0F86, 0x0F87], [0x0F90, 0x0F97],
        [0x0F99, 0x0FBC], [0x0FC6, 0x0FC6], [0x102D, 0x1030],
        [0x1032, 0x1032], [0x1036, 0x1037], [0x1039, 0x1039],
        [0x1058, 0x1059], [0x1160, 0x11FF], [0x135F, 0x135F],
        [0x1712, 0x1714], [0x1732, 0x1734], [0x1752, 0x1753],
        [0x1772, 0x1773], [0x17B4, 0x17B5], [0x17B7, 0x17BD],
        [0x17C6, 0x17C6], [0x17C9, 0x17D3], [0x17DD, 0x17DD],
        [0x180B, 0x180D], [0x18A9, 0x18A9], [0x1920, 0x1922],
        [0x1927, 0x1928], [0x1932, 0x1932], [0x1939, 0x193B],
        [0x1A17, 0x1A18], [0x1B00, 0x1B03], [0x1B34, 0x1B34],
        [0x1B36, 0x1B3A], [0x1B3C, 0x1B3C], [0x1B42, 0x1B42],
        [0x1B6B, 0x1B73], [0x1DC0, 0x1DCA], [0x1DFE, 0x1DFF],
        [0x200B, 0x200F], [0x202A, 0x202E], [0x2060, 0x2063],
        [0x206A, 0x206F], [0x20D0, 0x20EF], [0x302A, 0x302F],
        [0x3099, 0x309A], [0xA806, 0xA806], [0xA80B, 0xA80B],
        [0xA825, 0xA826], [0xFB1E, 0xFB1E], [0xFE00, 0xFE0F],
        [0xFE20, 0xFE23], [0xFEFF, 0xFEFF], [0xFFF9, 0xFFFB],
    ];
    var COMBINING_HIGH = [
        [0x10A01, 0x10A03], [0x10A05, 0x10A06], [0x10A0C, 0x10A0F],
        [0x10A38, 0x10A3A], [0x10A3F, 0x10A3F], [0x1D167, 0x1D169],
        [0x1D173, 0x1D182], [0x1D185, 0x1D18B], [0x1D1AA, 0x1D1AD],
        [0x1D242, 0x1D244], [0xE0001, 0xE0001], [0xE0020, 0xE007F],
        [0xE0100, 0xE01EF]
    ];
    function bisearch(ucs, data) {
        var min = 0;
        var max = data.length - 1;
        var mid;
        if (ucs < data[0][0] || ucs > data[max][1])
            return false;
        while (max >= min) {
            mid = (min + max) >> 1;
            if (ucs > data[mid][1])
                min = mid + 1;
            else if (ucs < data[mid][0])
                max = mid - 1;
            else
                return true;
        }
        return false;
    }
    function wcwidthBMP(ucs) {
        if (ucs === 0)
            return opts.nul;
        if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
            return opts.control;
        if (bisearch(ucs, COMBINING_BMP))
            return 0;
        if (isWideBMP(ucs)) {
            return 2;
        }
        return 1;
    }
    function isWideBMP(ucs) {
        return (ucs >= 0x1100 && (ucs <= 0x115f ||
            ucs === 0x2329 ||
            ucs === 0x232a ||
            (ucs >= 0x2e80 && ucs <= 0xa4cf && ucs !== 0x303f) ||
            (ucs >= 0xac00 && ucs <= 0xd7a3) ||
            (ucs >= 0xf900 && ucs <= 0xfaff) ||
            (ucs >= 0xfe10 && ucs <= 0xfe19) ||
            (ucs >= 0xfe30 && ucs <= 0xfe6f) ||
            (ucs >= 0xff00 && ucs <= 0xff60) ||
            (ucs >= 0xffe0 && ucs <= 0xffe6)));
    }
    function wcwidthHigh(ucs) {
        if (bisearch(ucs, COMBINING_HIGH))
            return 0;
        if ((ucs >= 0x20000 && ucs <= 0x2fffd) || (ucs >= 0x30000 && ucs <= 0x3fffd)) {
            return 2;
        }
        return 1;
    }
    var control = opts.control | 0;
    var table = null;
    function init_table() {
        var CODEPOINTS = 65536;
        var BITWIDTH = 2;
        var ITEMSIZE = 32;
        var CONTAINERSIZE = CODEPOINTS * BITWIDTH / ITEMSIZE;
        var CODEPOINTS_PER_ITEM = ITEMSIZE / BITWIDTH;
        table = (typeof Uint32Array === 'undefined')
            ? new Array(CONTAINERSIZE)
            : new Uint32Array(CONTAINERSIZE);
        for (var i = 0; i < CONTAINERSIZE; ++i) {
            var num = 0;
            var pos = CODEPOINTS_PER_ITEM;
            while (pos--)
                num = (num << 2) | wcwidthBMP(CODEPOINTS_PER_ITEM * i + pos);
            table[i] = num;
        }
        return table;
    }
    return function (num) {
        num = num | 0;
        if (num < 32)
            return control | 0;
        if (num < 127)
            return 1;
        var t = table || init_table();
        if (num < 65536)
            return t[num >> 4] >> ((num & 15) << 1) & 3;
        return wcwidthHigh(num);
    };
})({ nul: 0, control: 0 });

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