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311 lines
12 KiB
311 lines
12 KiB
var eaw = {}; |
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if ('undefined' == typeof module) { |
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window.eastasianwidth = eaw; |
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} else { |
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module.exports = eaw; |
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} |
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eaw.eastAsianWidth = function(character) { |
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var x = character.charCodeAt(0); |
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var y = (character.length == 2) ? character.charCodeAt(1) : 0; |
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var codePoint = x; |
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if ((0xD800 <= x && x <= 0xDBFF) && (0xDC00 <= y && y <= 0xDFFF)) { |
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x &= 0x3FF; |
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y &= 0x3FF; |
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codePoint = (x << 10) | y; |
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codePoint += 0x10000; |
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} |
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if ((0x3000 == codePoint) || |
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(0xFF01 <= codePoint && codePoint <= 0xFF60) || |
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(0xFFE0 <= codePoint && codePoint <= 0xFFE6)) { |
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return 'F'; |
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} |
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if ((0x20A9 == codePoint) || |
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(0xFF61 <= codePoint && codePoint <= 0xFFBE) || |
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(0xFFC2 <= codePoint && codePoint <= 0xFFC7) || |
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(0xFFCA <= codePoint && codePoint <= 0xFFCF) || |
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(0xFFD2 <= codePoint && codePoint <= 0xFFD7) || |
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(0xFFDA <= codePoint && codePoint <= 0xFFDC) || |
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(0xFFE8 <= codePoint && codePoint <= 0xFFEE)) { |
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return 'H'; |
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} |
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if ((0x1100 <= codePoint && codePoint <= 0x115F) || |
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(0x11A3 <= codePoint && codePoint <= 0x11A7) || |
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(0x11FA <= codePoint && codePoint <= 0x11FF) || |
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(0x2329 <= codePoint && codePoint <= 0x232A) || |
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(0x2E80 <= codePoint && codePoint <= 0x2E99) || |
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(0x2E9B <= codePoint && codePoint <= 0x2EF3) || |
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(0x2F00 <= codePoint && codePoint <= 0x2FD5) || |
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(0x2FF0 <= codePoint && codePoint <= 0x2FFB) || |
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(0x3001 <= codePoint && codePoint <= 0x303E) || |
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(0x3041 <= codePoint && codePoint <= 0x3096) || |
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(0x3099 <= codePoint && codePoint <= 0x30FF) || |
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(0x3105 <= codePoint && codePoint <= 0x312D) || |
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(0x3131 <= codePoint && codePoint <= 0x318E) || |
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(0x3190 <= codePoint && codePoint <= 0x31BA) || |
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(0x31C0 <= codePoint && codePoint <= 0x31E3) || |
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(0x31F0 <= codePoint && codePoint <= 0x321E) || |
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(0x3220 <= codePoint && codePoint <= 0x3247) || |
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(0x3250 <= codePoint && codePoint <= 0x32FE) || |
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(0x3300 <= codePoint && codePoint <= 0x4DBF) || |
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(0x4E00 <= codePoint && codePoint <= 0xA48C) || |
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(0xA490 <= codePoint && codePoint <= 0xA4C6) || |
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(0xA960 <= codePoint && codePoint <= 0xA97C) || |
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(0xAC00 <= codePoint && codePoint <= 0xD7A3) || |
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(0xD7B0 <= codePoint && codePoint <= 0xD7C6) || |
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(0xD7CB <= codePoint && codePoint <= 0xD7FB) || |
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(0xF900 <= codePoint && codePoint <= 0xFAFF) || |
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(0xFE10 <= codePoint && codePoint <= 0xFE19) || |
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(0xFE30 <= codePoint && codePoint <= 0xFE52) || |
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(0xFE54 <= codePoint && codePoint <= 0xFE66) || |
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(0xFE68 <= codePoint && codePoint <= 0xFE6B) || |
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(0x1B000 <= codePoint && codePoint <= 0x1B001) || |
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(0x1F200 <= codePoint && codePoint <= 0x1F202) || |
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(0x1F210 <= codePoint && codePoint <= 0x1F23A) || |
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(0x1F240 <= codePoint && codePoint <= 0x1F248) || |
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(0x1F250 <= codePoint && codePoint <= 0x1F251) || |
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(0x20000 <= codePoint && codePoint <= 0x2F73F) || |
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(0x2B740 <= codePoint && codePoint <= 0x2FFFD) || |
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(0x30000 <= codePoint && codePoint <= 0x3FFFD)) { |
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return 'W'; |
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} |
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if ((0x0020 <= codePoint && codePoint <= 0x007E) || |
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(0x00A2 <= codePoint && codePoint <= 0x00A3) || |
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(0x00A5 <= codePoint && codePoint <= 0x00A6) || |
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(0x00AC == codePoint) || |
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(0x00AF == codePoint) || |
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(0x27E6 <= codePoint && codePoint <= 0x27ED) || |
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(0x2985 <= codePoint && codePoint <= 0x2986)) { |
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return 'Na'; |
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} |
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if ((0x00A1 == codePoint) || |
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(0x00A4 == codePoint) || |
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(0x00A7 <= codePoint && codePoint <= 0x00A8) || |
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(0x00AA == codePoint) || |
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(0x00AD <= codePoint && codePoint <= 0x00AE) || |
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(0x00B0 <= codePoint && codePoint <= 0x00B4) || |
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(0x00B6 <= codePoint && codePoint <= 0x00BA) || |
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(0x00BC <= codePoint && codePoint <= 0x00BF) || |
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(0x00C6 == codePoint) || |
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(0x00D0 == codePoint) || |
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(0x00D7 <= codePoint && codePoint <= 0x00D8) || |
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(0x00DE <= codePoint && codePoint <= 0x00E1) || |
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(0x00E6 == codePoint) || |
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(0x00E8 <= codePoint && codePoint <= 0x00EA) || |
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(0x00EC <= codePoint && codePoint <= 0x00ED) || |
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(0x00F0 == codePoint) || |
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(0x00F2 <= codePoint && codePoint <= 0x00F3) || |
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(0x00F7 <= codePoint && codePoint <= 0x00FA) || |
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(0x00FC == codePoint) || |
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(0x00FE == codePoint) || |
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(0x0101 == codePoint) || |
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(0x0111 == codePoint) || |
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(0x0113 == codePoint) || |
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(0x011B == codePoint) || |
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(0x0126 <= codePoint && codePoint <= 0x0127) || |
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(0x012B == codePoint) || |
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(0x0131 <= codePoint && codePoint <= 0x0133) || |
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(0x0138 == codePoint) || |
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(0x013F <= codePoint && codePoint <= 0x0142) || |
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(0x0144 == codePoint) || |
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(0x0148 <= codePoint && codePoint <= 0x014B) || |
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(0x014D == codePoint) || |
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(0x0152 <= codePoint && codePoint <= 0x0153) || |
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(0x0166 <= codePoint && codePoint <= 0x0167) || |
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(0x016B == codePoint) || |
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(0x01CE == codePoint) || |
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(0x01D0 == codePoint) || |
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(0x01D2 == codePoint) || |
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(0x01D4 == codePoint) || |
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(0x01D6 == codePoint) || |
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(0x01D8 == codePoint) || |
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(0x01DA == codePoint) || |
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(0x01DC == codePoint) || |
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(0x0251 == codePoint) || |
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(0x0261 == codePoint) || |
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(0x02C4 == codePoint) || |
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(0x02C7 == codePoint) || |
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(0x02C9 <= codePoint && codePoint <= 0x02CB) || |
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(0x02CD == codePoint) || |
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(0x02D0 == codePoint) || |
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(0x02D8 <= codePoint && codePoint <= 0x02DB) || |
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(0x02DD == codePoint) || |
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(0x02DF == codePoint) || |
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(0x0300 <= codePoint && codePoint <= 0x036F) || |
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(0x0391 <= codePoint && codePoint <= 0x03A1) || |
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(0x03A3 <= codePoint && codePoint <= 0x03A9) || |
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(0x03B1 <= codePoint && codePoint <= 0x03C1) || |
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(0x03C3 <= codePoint && codePoint <= 0x03C9) || |
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(0x0401 == codePoint) || |
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(0x0410 <= codePoint && codePoint <= 0x044F) || |
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(0x0451 == codePoint) || |
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(0x2010 == codePoint) || |
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(0x2013 <= codePoint && codePoint <= 0x2016) || |
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(0x2018 <= codePoint && codePoint <= 0x2019) || |
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(0x201C <= codePoint && codePoint <= 0x201D) || |
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(0x2020 <= codePoint && codePoint <= 0x2022) || |
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(0x2024 <= codePoint && codePoint <= 0x2027) || |
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(0x2030 == codePoint) || |
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(0x2032 <= codePoint && codePoint <= 0x2033) || |
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(0x2035 == codePoint) || |
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(0x203B == codePoint) || |
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(0x203E == codePoint) || |
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(0x2074 == codePoint) || |
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(0x207F == codePoint) || |
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(0x2081 <= codePoint && codePoint <= 0x2084) || |
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(0x20AC == codePoint) || |
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(0x2103 == codePoint) || |
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(0x2105 == codePoint) || |
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(0x2109 == codePoint) || |
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(0x2113 == codePoint) || |
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(0x2116 == codePoint) || |
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(0x2121 <= codePoint && codePoint <= 0x2122) || |
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(0x2126 == codePoint) || |
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(0x212B == codePoint) || |
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(0x2153 <= codePoint && codePoint <= 0x2154) || |
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(0x215B <= codePoint && codePoint <= 0x215E) || |
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(0x2160 <= codePoint && codePoint <= 0x216B) || |
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(0x2170 <= codePoint && codePoint <= 0x2179) || |
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(0x2189 == codePoint) || |
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(0x2190 <= codePoint && codePoint <= 0x2199) || |
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(0x21B8 <= codePoint && codePoint <= 0x21B9) || |
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(0x21D2 == codePoint) || |
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(0x21D4 == codePoint) || |
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(0x21E7 == codePoint) || |
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(0x2200 == codePoint) || |
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(0x2202 <= codePoint && codePoint <= 0x2203) || |
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(0x2207 <= codePoint && codePoint <= 0x2208) || |
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(0x220B == codePoint) || |
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(0x220F == codePoint) || |
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(0x2211 == codePoint) || |
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(0x2215 == codePoint) || |
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(0x221A == codePoint) || |
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(0x221D <= codePoint && codePoint <= 0x2220) || |
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(0x2223 == codePoint) || |
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(0x2225 == codePoint) || |
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(0x2227 <= codePoint && codePoint <= 0x222C) || |
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(0x222E == codePoint) || |
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(0x2234 <= codePoint && codePoint <= 0x2237) || |
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(0x223C <= codePoint && codePoint <= 0x223D) || |
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(0x2248 == codePoint) || |
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(0x224C == codePoint) || |
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(0x2252 == codePoint) || |
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(0x2260 <= codePoint && codePoint <= 0x2261) || |
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(0x2264 <= codePoint && codePoint <= 0x2267) || |
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(0x226A <= codePoint && codePoint <= 0x226B) || |
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(0x226E <= codePoint && codePoint <= 0x226F) || |
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(0x2282 <= codePoint && codePoint <= 0x2283) || |
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(0x2286 <= codePoint && codePoint <= 0x2287) || |
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(0x2295 == codePoint) || |
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(0x2299 == codePoint) || |
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(0x22A5 == codePoint) || |
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(0x22BF == codePoint) || |
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(0x2312 == codePoint) || |
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(0x2460 <= codePoint && codePoint <= 0x24E9) || |
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(0x24EB <= codePoint && codePoint <= 0x254B) || |
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(0x2550 <= codePoint && codePoint <= 0x2573) || |
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(0x2580 <= codePoint && codePoint <= 0x258F) || |
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(0x2592 <= codePoint && codePoint <= 0x2595) || |
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(0x25A0 <= codePoint && codePoint <= 0x25A1) || |
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(0x25A3 <= codePoint && codePoint <= 0x25A9) || |
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(0x25B2 <= codePoint && codePoint <= 0x25B3) || |
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(0x25B6 <= codePoint && codePoint <= 0x25B7) || |
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(0x25BC <= codePoint && codePoint <= 0x25BD) || |
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(0x25C0 <= codePoint && codePoint <= 0x25C1) || |
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(0x25C6 <= codePoint && codePoint <= 0x25C8) || |
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(0x25CB == codePoint) || |
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(0x25CE <= codePoint && codePoint <= 0x25D1) || |
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(0x25E2 <= codePoint && codePoint <= 0x25E5) || |
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(0x25EF == codePoint) || |
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(0x2605 <= codePoint && codePoint <= 0x2606) || |
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(0x2609 == codePoint) || |
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(0x260E <= codePoint && codePoint <= 0x260F) || |
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(0x2614 <= codePoint && codePoint <= 0x2615) || |
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(0x261C == codePoint) || |
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(0x261E == codePoint) || |
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(0x2640 == codePoint) || |
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(0x2642 == codePoint) || |
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(0x2660 <= codePoint && codePoint <= 0x2661) || |
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(0x2663 <= codePoint && codePoint <= 0x2665) || |
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(0x2667 <= codePoint && codePoint <= 0x266A) || |
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(0x266C <= codePoint && codePoint <= 0x266D) || |
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(0x266F == codePoint) || |
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(0x269E <= codePoint && codePoint <= 0x269F) || |
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(0x26BE <= codePoint && codePoint <= 0x26BF) || |
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(0x26C4 <= codePoint && codePoint <= 0x26CD) || |
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(0x26CF <= codePoint && codePoint <= 0x26E1) || |
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(0x26E3 == codePoint) || |
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(0x26E8 <= codePoint && codePoint <= 0x26FF) || |
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(0x273D == codePoint) || |
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(0x2757 == codePoint) || |
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(0x2776 <= codePoint && codePoint <= 0x277F) || |
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(0x2B55 <= codePoint && codePoint <= 0x2B59) || |
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(0x3248 <= codePoint && codePoint <= 0x324F) || |
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(0xE000 <= codePoint && codePoint <= 0xF8FF) || |
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(0xFE00 <= codePoint && codePoint <= 0xFE0F) || |
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(0xFFFD == codePoint) || |
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(0x1F100 <= codePoint && codePoint <= 0x1F10A) || |
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(0x1F110 <= codePoint && codePoint <= 0x1F12D) || |
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(0x1F130 <= codePoint && codePoint <= 0x1F169) || |
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(0x1F170 <= codePoint && codePoint <= 0x1F19A) || |
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(0xE0100 <= codePoint && codePoint <= 0xE01EF) || |
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(0xF0000 <= codePoint && codePoint <= 0xFFFFD) || |
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(0x100000 <= codePoint && codePoint <= 0x10FFFD)) { |
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return 'A'; |
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} |
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return 'N'; |
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}; |
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eaw.characterLength = function(character) { |
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var code = this.eastAsianWidth(character); |
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if (code == 'F' || code == 'W' || code == 'A') { |
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return 2; |
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} else { |
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return 1; |
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} |
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}; |
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// Split a string considering surrogate-pairs. |
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function stringToArray(string) { |
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return string.match(/[\uD800-\uDBFF][\uDC00-\uDFFF]|[^\uD800-\uDFFF]/g) || []; |
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} |
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eaw.length = function(string) { |
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var characters = stringToArray(string); |
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var len = 0; |
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for (var i = 0; i < characters.length; i++) { |
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len = len + this.characterLength(characters[i]); |
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} |
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return len; |
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}; |
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eaw.slice = function(text, start, end) { |
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textLen = eaw.length(text) |
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start = start ? start : 0; |
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end = end ? end : 1; |
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if (start < 0) { |
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start = textLen + start; |
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} |
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if (end < 0) { |
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end = textLen + end; |
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} |
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var result = ''; |
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var eawLen = 0; |
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var chars = stringToArray(text); |
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for (var i = 0; i < chars.length; i++) { |
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var char = chars[i]; |
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var charLen = eaw.length(char); |
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if (eawLen >= start - (charLen == 2 ? 1 : 0)) { |
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if (eawLen + charLen <= end) { |
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result += char; |
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} else { |
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break; |
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} |
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} |
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eawLen += charLen; |
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} |
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return result; |
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};
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