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58 lines
1.7 KiB
58 lines
1.7 KiB
(function() {
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var L = require('./L').L,
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N = require('./N').N,
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Z = require('./Z').Z,
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M = require('./M').M,
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unorm = require('unorm');
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var _unicodeCategory = function(code) {
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if (~L.indexOf(code)) return 'L';
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if (~N.indexOf(code)) return 'N';
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if (~Z.indexOf(code)) return 'Z';
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if (~M.indexOf(code)) return 'M';
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return undefined;
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};
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module.exports = function(string, options) {
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string = string || '';
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options = options || {};
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var allowedChars = options.allowedChars || '-_~';
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var lower = typeof options.lower === 'boolean' ? options.lower : true;
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var spaces = typeof options.spaces === 'boolean' ? options.spaces : false;
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var rv = [];
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var chars = unorm.nfkc(string);
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for(var i = 0; i < chars.length; i++) {
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var c = chars[i];
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var code = c.charCodeAt(0);
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// Allow Common CJK Unified Ideographs
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// See: http://www.unicode.org/versions/Unicode6.0.0/ch12.pdf - Table 12-2
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if (0x4E00 <= code && code <= 0x9FFF) {
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rv.push(c);
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continue;
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}
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// Allow Hangul
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if (0xAC00 <= code && code <= 0xD7A3) {
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rv.push(c);
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continue;
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}
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// Japanese ideographic punctuation
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if ((0x3000 <= code && code <= 0x3002) || (0xFF01 <= code && code <= 0xFF02)) {
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rv.push(' ');
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}
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if (allowedChars.indexOf(c) != -1) {
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rv.push(c);
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continue;
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}
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var val = _unicodeCategory(code);
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if (val && ~'LNM'.indexOf(val)) rv.push(c);
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if (val && ~'Z'.indexOf(val)) rv.push(' ');
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}
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var slug = rv.join('').replace(/^\s+|\s+$/g, '').replace(/\s+/g,' ');
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if (!spaces) slug = slug.replace(/[\s\-]+/g,'-');
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if (lower) slug = slug.toLowerCase();
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return slug;
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};
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}()); |