38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
// Thanks @mathiasbynens
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// http://mathiasbynens.be/notes/javascript-unicode#iterating-over-symbols
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'use strict';
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var setPrototypeOf = require('es5-ext/object/set-prototype-of')
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, d = require('d')
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, Iterator = require('./')
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, defineProperty = Object.defineProperty
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, StringIterator;
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StringIterator = module.exports = function (str) {
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if (!(this instanceof StringIterator)) return new StringIterator(str);
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str = String(str);
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Iterator.call(this, str);
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defineProperty(this, '__length__', d('', str.length));
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};
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if (setPrototypeOf) setPrototypeOf(StringIterator, Iterator);
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StringIterator.prototype = Object.create(Iterator.prototype, {
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constructor: d(StringIterator),
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_next: d(function () {
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if (!this.__list__) return;
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if (this.__nextIndex__ < this.__length__) return this.__nextIndex__++;
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this._unBind();
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}),
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_resolve: d(function (i) {
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var char = this.__list__[i], code;
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if (this.__nextIndex__ === this.__length__) return char;
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code = char.charCodeAt(0);
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if ((code >= 0xD800) && (code <= 0xDBFF)) return char + this.__list__[this.__nextIndex__++];
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return char;
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}),
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toString: d(function () { return '[object String Iterator]'; })
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});
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