Lao Tzu
707 lines
14 KiB
JavaScript
707 lines
14 KiB
JavaScript
/*
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Copyright (C) 2018-2020 Dimitar Toshkov Zhekov <dimitar.zhekov@gmail.com>
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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'use strict';
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const fnutil = require('./fnutil.js');
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// -- xAvgCharWidth --
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const WEIGHT_FACTORS = [
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[ 'a', 64 ],
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[ 'b', 14 ],
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[ 'c', 27 ],
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[ 'd', 35 ],
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[ 'e', 100 ],
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[ 'f', 20 ],
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[ 'g', 14 ],
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[ 'h', 42 ],
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[ 'i', 63 ],
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[ 'j', 3 ],
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[ 'k', 6 ],
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[ 'l', 35 ],
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[ 'm', 20 ],
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[ 'n', 56 ],
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[ 'o', 56 ],
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[ 'p', 17 ],
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[ 'q', 4 ],
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[ 'r', 49 ],
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[ 's', 56 ],
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[ 't', 71 ],
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[ 'u', 31 ],
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[ 'v', 10 ],
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[ 'w', 18 ],
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[ 'x', 3 ],
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[ 'y', 18 ],
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[ 'z', 2 ],
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[ ' ', 166 ]
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];
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function xAvgCharWidth(font) {
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let xAvgTotalWidth = 0;
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for (let factor of WEIGHT_FACTORS) {
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const char = font.chars.find(_char => _char.code === factor[0].charCodeAt(0));
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if (char == null) {
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return 0;
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}
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xAvgTotalWidth += font.scaleWidth(char) * factor[1];
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}
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return fnutil.round(xAvgTotalWidth / 1000);
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}
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// -- ulCharRanges --
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const CHAR_RANGES = [
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[ 0, 0x0000, 0x007F ],
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[ 1, 0x0080, 0x00FF ],
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[ 2, 0x0100, 0x017F ],
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[ 3, 0x0180, 0x024F ],
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[ 4, 0x0250, 0x02AF ],
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[ 4, 0x1D00, 0x1D7F ],
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[ 4, 0x1D80, 0x1DBF ],
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[ 5, 0x02B0, 0x02FF ],
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[ 5, 0xA700, 0xA71F ],
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[ 6, 0x0300, 0x036F ],
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[ 6, 0x1DC0, 0x1DFF ],
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[ 7, 0x0370, 0x03FF ],
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[ 8, 0x2C80, 0x2CFF ],
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[ 9, 0x0400, 0x04FF ],
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[ 9, 0x0500, 0x052F ],
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[ 9, 0x2DE0, 0x2DFF ],
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[ 9, 0xA640, 0xA69F ],
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[ 10, 0x0530, 0x058F ],
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[ 11, 0x0590, 0x05FF ],
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[ 12, 0xA500, 0xA63F ],
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[ 13, 0x0600, 0x06FF ],
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[ 13, 0x0750, 0x077F ],
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[ 14, 0x07C0, 0x07FF ],
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[ 15, 0x0900, 0x097F ],
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[ 16, 0x0980, 0x09FF ],
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[ 17, 0x0A00, 0x0A7F ],
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[ 18, 0x0A80, 0x0AFF ],
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[ 19, 0x0B00, 0x0B7F ],
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[ 20, 0x0B80, 0x0BFF ],
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[ 21, 0x0C00, 0x0C7F ],
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[ 22, 0x0C80, 0x0CFF ],
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[ 23, 0x0D00, 0x0D7F ],
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[ 24, 0x0E00, 0x0E7F ],
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[ 25, 0x0E80, 0x0EFF ],
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[ 26, 0x10A0, 0x10FF ],
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[ 26, 0x2D00, 0x2D2F ],
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[ 27, 0x1B00, 0x1B7F ],
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[ 28, 0x1100, 0x11FF ],
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[ 29, 0x1E00, 0x1EFF ],
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[ 29, 0x2C60, 0x2C7F ],
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[ 29, 0xA720, 0xA7FF ],
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[ 30, 0x1F00, 0x1FFF ],
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[ 31, 0x2000, 0x206F ],
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[ 31, 0x2E00, 0x2E7F ],
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[ 32, 0x2070, 0x209F ],
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[ 33, 0x20A0, 0x20CF ],
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[ 34, 0x20D0, 0x20FF ],
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[ 35, 0x2100, 0x214F ],
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[ 36, 0x2150, 0x218F ],
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[ 37, 0x2190, 0x21FF ],
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[ 37, 0x27F0, 0x27FF ],
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[ 37, 0x2900, 0x297F ],
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[ 37, 0x2B00, 0x2BFF ],
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[ 38, 0x2200, 0x22FF ],
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[ 38, 0x2A00, 0x2AFF ],
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[ 38, 0x27C0, 0x27EF ],
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[ 38, 0x2980, 0x29FF ],
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[ 39, 0x2300, 0x23FF ],
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[ 40, 0x2400, 0x243F ],
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[ 41, 0x2440, 0x245F ],
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[ 42, 0x2460, 0x24FF ],
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[ 43, 0x2500, 0x257F ],
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[ 44, 0x2580, 0x259F ],
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[ 45, 0x25A0, 0x25FF ],
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[ 46, 0x2600, 0x26FF ],
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[ 47, 0x2700, 0x27BF ],
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[ 48, 0x3000, 0x303F ],
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[ 49, 0x3040, 0x309F ],
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[ 50, 0x30A0, 0x30FF ],
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[ 50, 0x31F0, 0x31FF ],
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[ 51, 0x3100, 0x312F ],
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[ 51, 0x31A0, 0x31BF ],
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[ 52, 0x3130, 0x318F ],
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[ 53, 0xA840, 0xA87F ],
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[ 54, 0x3200, 0x32FF ],
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[ 55, 0x3300, 0x33FF ],
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[ 56, 0xAC00, 0xD7AF ],
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[ 57, 0xD800, 0xDFFF ],
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[ 58, 0x10900, 0x1091F ],
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[ 59, 0x4E00, 0x9FFF ],
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[ 59, 0x2E80, 0x2EFF ],
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[ 59, 0x2F00, 0x2FDF ],
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[ 59, 0x2FF0, 0x2FFF ],
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[ 59, 0x3400, 0x4DBF ],
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[ 59, 0x20000, 0x2A6DF ],
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[ 59, 0x3190, 0x319F ],
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[ 60, 0xE000, 0xF8FF ],
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[ 61, 0x31C0, 0x31EF ],
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[ 61, 0xF900, 0xFAFF ],
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[ 61, 0x2F800, 0x2FA1F ],
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[ 62, 0xFB00, 0xFB4F ],
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[ 63, 0xFB50, 0xFDFF ],
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[ 64, 0xFE20, 0xFE2F ],
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[ 65, 0xFE10, 0xFE1F ],
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[ 65, 0xFE30, 0xFE4F ],
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[ 66, 0xFE50, 0xFE6F ],
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[ 67, 0xFE70, 0xFEFF ],
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[ 68, 0xFF00, 0xFFEF ],
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[ 69, 0xFFF0, 0xFFFF ],
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[ 70, 0x0F00, 0x0FFF ],
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[ 71, 0x0700, 0x074F ],
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[ 72, 0x0780, 0x07BF ],
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[ 73, 0x0D80, 0x0DFF ],
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[ 74, 0x1000, 0x109F ],
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[ 75, 0x1200, 0x137F ],
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[ 75, 0x1380, 0x139F ],
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[ 75, 0x2D80, 0x2DDF ],
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[ 76, 0x13A0, 0x13FF ],
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[ 77, 0x1400, 0x167F ],
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[ 78, 0x1680, 0x169F ],
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[ 79, 0x16A0, 0x16FF ],
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[ 80, 0x1780, 0x17FF ],
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[ 80, 0x19E0, 0x19FF ],
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[ 81, 0x1800, 0x18AF ],
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[ 82, 0x2800, 0x28FF ],
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[ 83, 0xA000, 0xA48F ],
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[ 83, 0xA490, 0xA4CF ],
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[ 84, 0x1700, 0x171F ],
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[ 84, 0x1720, 0x173F ],
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[ 84, 0x1740, 0x175F ],
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[ 84, 0x1760, 0x177F ],
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[ 85, 0x10300, 0x1032F ],
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[ 86, 0x10330, 0x1034F ],
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[ 87, 0x10400, 0x1044F ],
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[ 88, 0x1D000, 0x1D0FF ],
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[ 88, 0x1D100, 0x1D1FF ],
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[ 88, 0x1D200, 0x1D24F ],
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[ 89, 0x1D400, 0x1D7FF ],
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[ 90, 0xF0000, 0xFFFFD ],
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[ 90, 0x100000, 0x10FFFD ],
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[ 91, 0xFE00, 0xFE0F ],
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[ 91, 0xE0100, 0xE01EF ],
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[ 92, 0xE0000, 0xE007F ],
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[ 93, 0x1900, 0x194F ],
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[ 94, 0x1950, 0x197F ],
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[ 95, 0x1980, 0x19DF ],
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[ 96, 0x1A00, 0x1A1F ],
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[ 97, 0x2C00, 0x2C5F ],
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[ 98, 0x2D30, 0x2D7F ],
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[ 99, 0x4DC0, 0x4DFF ],
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[ 100, 0xA800, 0xA82F ],
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[ 101, 0x10000, 0x1007F ],
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[ 101, 0x10080, 0x100FF ],
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[ 101, 0x10100, 0x1013F ],
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[ 102, 0x10140, 0x1018F ],
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[ 103, 0x10380, 0x1039F ],
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[ 104, 0x103A0, 0x103DF ],
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[ 105, 0x10450, 0x1047F ],
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[ 106, 0x10480, 0x104AF ],
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[ 107, 0x10800, 0x1083F ],
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[ 108, 0x10A00, 0x10A5F ],
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[ 109, 0x1D300, 0x1D35F ],
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[ 110, 0x12000, 0x123FF ],
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[ 110, 0x12400, 0x1247F ],
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[ 111, 0x1D360, 0x1D37F ],
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[ 112, 0x1B80, 0x1BBF ],
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[ 113, 0x1C00, 0x1C4F ],
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[ 114, 0x1C50, 0x1C7F ],
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[ 115, 0xA880, 0xA8DF ],
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[ 116, 0xA900, 0xA92F ],
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[ 117, 0xA930, 0xA95F ],
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[ 118, 0xAA00, 0xAA5F ],
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[ 119, 0x10190, 0x101CF ],
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[ 120, 0x101D0, 0x101FF ],
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[ 121, 0x102A0, 0x102DF ],
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[ 121, 0x10280, 0x1029F ],
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[ 121, 0x10920, 0x1093F ],
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[ 122, 0x1F030, 0x1F09F ],
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[ 122, 0x1F000, 0x1F02F ]
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];
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function ulCharRanges(font) {
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let charRanges = [0, 0, 0, 0];
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font.chars.forEach(char => {
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const unicode = char.code;
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const range = CHAR_RANGES.find(_range => unicode >= _range[1] && unicode <= _range[2]);
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if (range != null) {
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charRanges[range[0] >> 5] |= 1 << (range[0] & 0x1F);
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}
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});
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if (font.maxCode >= 0x10000) {
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charRanges[57 >> 5] |= 1 << (57 & 0x1F);
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}
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return [ charRanges[0] >>> 0, charRanges[1] >>> 0, charRanges[2] >>> 0, charRanges[3] >>> 0 ];
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}
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// -- ulCodePages --
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function ulCodePages(font) {
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const spaceIndex = font.chars.findIndex(char => char.code === 0x20);
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const ascii = Number(spaceIndex !== -1 && font.chars[spaceIndex + 0x5E].code === 0x7E);
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const findf = (unicode) => Number(font.chars.findIndex(char => char.code === unicode) !== -1);
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const graph = findf(0x2524);
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const radic = findf(0x221A);
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let codePages = [0, 0];
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// conditions from FontForge
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font.chars.forEach(char => {
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switch (char.code) {
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case 0x00DE:
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codePages[0] |= (ascii) << 0; // 1252 Latin1
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break;
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case 0x255A:
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codePages[1] |= (ascii) << 30; // 850 WE/Latin1
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codePages[1] |= (ascii) << 31; // 437 US
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break;
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case 0x013D:
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codePages[0] |= (ascii) << 1; // 1250 Latin 2: Eastern Europe
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codePages[1] |= (ascii & graph) << 26; // 852 Latin 2
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break;
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case 0x0411:
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codePages[0] |= 1 << 2; // 1251 Cyrillic
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codePages[1] |= (findf(0x255C) & graph) << 17; // 866 MS-DOS Russian
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codePages[1] |= (findf(0x0405) & graph) << 25; // 855 IBM Cyrillic
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break;
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case 0x0386:
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codePages[0] |= 1 << 3; // 1253 Greek
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codePages[1] |= (findf(0x00BD) & graph) << 16; // 869 IBM Greek
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codePages[1] |= (graph & radic) << 28; // 737 Greek; former 437 G
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break;
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case 0x0130:
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codePages[0] |= (ascii) << 4; // 1254 Turkish
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codePages[1] |= (ascii & graph) << 24; // 857 IBM Turkish
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break;
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case 0x05D0:
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codePages[0] |= 1 << 5; // 1255 Hebrew
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codePages[1] |= (graph & radic) << 21; // 862 Hebrew
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break;
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case 0x0631:
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codePages[0] |= 1 << 6; // 1256 Arabic
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codePages[1] |= (radic) << 19; // 864 Arabic
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codePages[1] |= (graph) << 29; // 708 Arabic; ASMO 708
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break;
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case 0x0157:
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codePages[0] |= (ascii) << 7; // 1257 Windows Baltic
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codePages[1] |= (ascii & graph) << 27; // 775 MS-DOS Baltic
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break;
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case 0x20AB:
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codePages[0] |= 1 << 8; // 1258 Vietnamese
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break;
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case 0x0E45:
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codePages[0] |= 1 << 16; // 874 Thai
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break;
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case 0x30A8:
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codePages[0] |= 1 << 17; // 932 JIS/Japan
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break;
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case 0x3105:
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codePages[0] |= 1 << 18; // 936 Chinese: Simplified chars
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break;
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case 0x3131:
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codePages[0] |= 1 << 19; // 949 Korean Wansung
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break;
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case 0x592E:
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codePages[0] |= 1 << 20; // 950 Chinese: Traditional chars
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break;
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case 0xACF4:
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codePages[0] |= 1 << 21; // 1361 Korean Johab
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break;
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case 0x2030:
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codePages[0] |= (findf(0x2211) & ascii) << 29; // Macintosh Character Set (Roman)
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break;
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case 0x2665:
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codePages[0] |= (ascii) << 30; // OEM Character Set
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break;
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case 0x00C5:
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codePages[1] |= (ascii & graph & radic) << 18; // 865 MS-DOS Nordic
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break;
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case 0x00E9:
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codePages[1] |= (ascii & graph & radic) << 20; // 863 MS-DOS Canadian French
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break;
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case 0x00F5:
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codePages[1] |= (ascii & graph & radic) << 23; // 860 MS-DOS Portuguese
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break;
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case 0x00FE:
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codePages[1] |= (ascii & graph) << 22; // 861 MS-DOS Icelandic
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break;
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default :
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if (char.code >= 0xF000 && char.code <= 0xF0FF) {
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codePages[0] |= 1 << 31; // Symbol Character Set
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}
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break;
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}
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});
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return [ codePages[0] >>> 0, codePages[1] >>> 0 ];
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}
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// -- containsRTL --
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const RTL_RANGES = [
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[ 0x05BE, 0x05BE ],
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[ 0x05C0, 0x05C0 ],
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[ 0x05C3, 0x05C3 ],
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[ 0x05C6, 0x05C6 ],
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[ 0x05D0, 0x05EA ],
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[ 0x05EF, 0x05F4 ],
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[ 0x0608, 0x0608 ],
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[ 0x060B, 0x060B ],
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[ 0x060D, 0x060D ],
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[ 0x061B, 0x061C ],
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[ 0x061E, 0x064A ],
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[ 0x066D, 0x066F ],
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[ 0x0671, 0x06D5 ],
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[ 0x06E5, 0x06E6 ],
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[ 0x06EE, 0x06EF ],
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[ 0x06FA, 0x070D ],
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[ 0x070F, 0x0710 ],
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[ 0x0712, 0x072F ],
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[ 0x074D, 0x07A5 ],
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[ 0x07B1, 0x07B1 ],
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[ 0x07C0, 0x07EA ],
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[ 0x07F4, 0x07F5 ],
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[ 0x07FA, 0x07FA ],
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[ 0x07FE, 0x0815 ],
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[ 0x081A, 0x081A ],
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[ 0x0824, 0x0824 ],
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[ 0x0828, 0x0828 ],
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[ 0x0830, 0x083E ],
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[ 0x0840, 0x0858 ],
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[ 0x085E, 0x085E ],
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[ 0x0860, 0x086A ],
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[ 0x08A0, 0x08B4 ],
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[ 0x08B6, 0x08BD ],
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[ 0x200F, 0x200F ],
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[ 0x202B, 0x202B ],
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[ 0x202E, 0x202E ],
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[ 0xFB1D, 0xFB1D ],
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[ 0xFB1F, 0xFB28 ],
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[ 0xFB2A, 0xFB36 ],
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[ 0xFB38, 0xFB3C ],
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[ 0xFB3E, 0xFB3E ],
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[ 0xFB40, 0xFB41 ],
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[ 0xFB43, 0xFB44 ],
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[ 0xFB46, 0xFBC1 ],
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[ 0xFBD3, 0xFD3D ],
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[ 0xFD50, 0xFD8F ],
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[ 0xFD92, 0xFDC7 ],
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[ 0xFDF0, 0xFDFC ],
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[ 0xFE70, 0xFE74 ],
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[ 0xFE76, 0xFEFC ],
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[ 0x10800, 0x10FFF ],
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[ 0x1E800, 0x1EFFF ],
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[ -1, 0 ]
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];
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function containsRTL(font) {
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let index = 0;
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for (let char of font.chars) {
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while (char.code > RTL_RANGES[index][1]) {
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if (RTL_RANGES[++index][0] === -1) {
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break;
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}
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}
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if (char.code >= RTL_RANGES[index][0]) {
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return 0x200;
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}
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}
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return 0x000;
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}
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// -- postMacIndex --
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const POST_MAC_NAMES = [
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'.notdef',
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'.null',
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'nonmarkingreturn',
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'space',
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'exclam',
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|
'quotedbl',
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|
'numbersign',
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|
'dollar',
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|
'percent',
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|
'ampersand',
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|
'quotesingle',
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|
'parenleft',
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|
'parenright',
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|
'asterisk',
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|
'plus',
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|
'comma',
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|
'hyphen',
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|
'period',
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|
'slash',
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|
'zero',
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|
'one',
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|
'two',
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|
'three',
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|
'four',
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|
'five',
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|
'six',
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|
'seven',
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|
'eight',
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|
'nine',
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|
'colon',
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|
'semicolon',
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|
'less',
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|
'equal',
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|
'greater',
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|
'question',
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|
'at',
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|
'A',
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|
'B',
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|
'C',
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|
'D',
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|
'E',
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|
'F',
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|
'G',
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|
'H',
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|
'I',
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|
'J',
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|
'K',
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|
'L',
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|
'M',
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|
'N',
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|
'O',
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|
'P',
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|
'Q',
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|
'R',
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|
'S',
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|
'T',
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|
'U',
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|
'V',
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|
'W',
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|
'X',
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|
'Y',
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|
'Z',
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|
'bracketleft',
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|
'backslash',
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|
'bracketright',
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|
'asciicircum',
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|
'underscore',
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|
'grave',
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|
'a',
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|
'b',
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|
'c',
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|
'd',
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|
'e',
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|
'f',
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|
'g',
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|
'h',
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|
'i',
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|
'j',
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|
'k',
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|
'l',
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|
'm',
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|
'n',
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|
'o',
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|
'p',
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|
'q',
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|
'r',
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|
's',
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|
't',
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|
'u',
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|
'v',
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|
'w',
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|
'x',
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|
'y',
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|
'z',
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|
'braceleft',
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|
'bar',
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|
'braceright',
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|
'asciitilde',
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|
'Adieresis',
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|
'Aring',
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|
'Ccedilla',
|
|
'Eacute',
|
|
'Ntilde',
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|
'Odieresis',
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|
'Udieresis',
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|
'aacute',
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|
'agrave',
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|
'acircumflex',
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|
'adieresis',
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|
'atilde',
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|
'aring',
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|
'ccedilla',
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|
'eacute',
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|
'egrave',
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|
'ecircumflex',
|
|
'edieresis',
|
|
'iacute',
|
|
'igrave',
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|
'icircumflex',
|
|
'idieresis',
|
|
'ntilde',
|
|
'oacute',
|
|
'ograve',
|
|
'ocircumflex',
|
|
'odieresis',
|
|
'otilde',
|
|
'uacute',
|
|
'ugrave',
|
|
'ucircumflex',
|
|
'udieresis',
|
|
'dagger',
|
|
'degree',
|
|
'cent',
|
|
'sterling',
|
|
'section',
|
|
'bullet',
|
|
'paragraph',
|
|
'germandbls',
|
|
'registered',
|
|
'copyright',
|
|
'trademark',
|
|
'acute',
|
|
'dieresis',
|
|
'notequal',
|
|
'AE',
|
|
'Oslash',
|
|
'infinity',
|
|
'plusminus',
|
|
'lessequal',
|
|
'greaterequal',
|
|
'yen',
|
|
'mu',
|
|
'partialdiff',
|
|
'summation',
|
|
'product',
|
|
'pi',
|
|
'integral',
|
|
'ordfeminine',
|
|
'ordmasculine',
|
|
'Omega',
|
|
'ae',
|
|
'oslash',
|
|
'questiondown',
|
|
'exclamdown',
|
|
'logicalnot',
|
|
'radical',
|
|
'florin',
|
|
'approxequal',
|
|
'Delta',
|
|
'guillemotleft',
|
|
'guillemotright',
|
|
'ellipsis',
|
|
'nonbreakingspace',
|
|
'Agrave',
|
|
'Atilde',
|
|
'Otilde',
|
|
'OE',
|
|
'oe',
|
|
'endash',
|
|
'emdash',
|
|
'quotedblleft',
|
|
'quotedblright',
|
|
'quoteleft',
|
|
'quoteright',
|
|
'divide',
|
|
'lozenge',
|
|
'ydieresis',
|
|
'Ydieresis',
|
|
'fraction',
|
|
'currency',
|
|
'guilsinglleft',
|
|
'guilsinglright',
|
|
'fi',
|
|
'fl',
|
|
'daggerdbl',
|
|
'periodcentered',
|
|
'quotesinglbase',
|
|
'quotedblbase',
|
|
'perthousand',
|
|
'Acircumflex',
|
|
'Ecircumflex',
|
|
'Aacute',
|
|
'Edieresis',
|
|
'Egrave',
|
|
'Iacute',
|
|
'Icircumflex',
|
|
'Idieresis',
|
|
'Igrave',
|
|
'Oacute',
|
|
'Ocircumflex',
|
|
'apple',
|
|
'Ograve',
|
|
'Uacute',
|
|
'Ucircumflex',
|
|
'Ugrave',
|
|
'dotlessi',
|
|
'circumflex',
|
|
'tilde',
|
|
'macron',
|
|
'breve',
|
|
'dotaccent',
|
|
'ring',
|
|
'cedilla',
|
|
'hungarumlaut',
|
|
'ogonek',
|
|
'caron',
|
|
'Lslash',
|
|
'lslash',
|
|
'Scaron',
|
|
'scaron',
|
|
'Zcaron',
|
|
'zcaron',
|
|
'brokenbar',
|
|
'Eth',
|
|
'eth',
|
|
'Yacute',
|
|
'yacute',
|
|
'Thorn',
|
|
'thorn',
|
|
'minus',
|
|
'multiply',
|
|
'onesuperior',
|
|
'twosuperior',
|
|
'threesuperior',
|
|
'onehalf',
|
|
'onequarter',
|
|
'threequarters',
|
|
'franc',
|
|
'Gbreve',
|
|
'gbreve',
|
|
'Idotaccent',
|
|
'Scedilla',
|
|
'scedilla',
|
|
'Cacute',
|
|
'cacute',
|
|
'Ccaron',
|
|
'ccaron',
|
|
'dcroat'
|
|
];
|
|
|
|
function postMacNames() {
|
|
return POST_MAC_NAMES.slice();
|
|
}
|
|
|
|
// -- Export --
|
|
module.exports = Object.freeze({
|
|
xAvgCharWidth,
|
|
ulCharRanges,
|
|
ulCodePages,
|
|
containsRTL,
|
|
postMacNames
|
|
});
|