58 lines
2.0 KiB
JavaScript
58 lines
2.0 KiB
JavaScript
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'use strict';
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var clear = require('es5-ext/array/#/clear')
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, assign = require('es5-ext/object/assign')
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, setPrototypeOf = require('es5-ext/object/set-prototype-of')
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, toStringTagSymbol = require('es6-symbol').toStringTag
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, d = require('d')
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, autoBind = require('d/auto-bind')
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, Iterator = require('es6-iterator')
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, kinds = require('./iterator-kinds')
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, defineProperties = Object.defineProperties, keys = Object.keys
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, unBind = Iterator.prototype._unBind
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, PrimitiveMapIterator;
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PrimitiveMapIterator = module.exports = function (map, kind) {
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if (!(this instanceof PrimitiveMapIterator)) {
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return new PrimitiveMapIterator(map, kind);
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}
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Iterator.call(this, keys(map.__mapKeysData__), map);
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if (!kind || !kinds[kind]) kind = 'key+value';
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defineProperties(this, {
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__kind__: d('', kind),
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__keysData__: d('w', map.__mapKeysData__),
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__valuesData__: d('w', map.__mapValuesData__)
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});
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};
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if (setPrototypeOf) setPrototypeOf(PrimitiveMapIterator, Iterator);
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PrimitiveMapIterator.prototype = Object.create(Iterator.prototype, assign({
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constructor: d(PrimitiveMapIterator),
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_resolve: d(function (i) {
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if (this.__kind__ === 'value') return this.__valuesData__[this.__list__[i]];
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if (this.__kind__ === 'key') return this.__keysData__[this.__list__[i]];
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return [this.__keysData__[this.__list__[i]],
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this.__valuesData__[this.__list__[i]]];
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}),
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_unBind: d(function () {
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this.__keysData__ = null;
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this.__valuesData__ = null;
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unBind.call(this);
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}),
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toString: d(function () { return '[object Map Iterator]'; })
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}, autoBind({
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_onAdd: d(function (key) { this.__list__.push(key); }),
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_onDelete: d(function (key) {
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var index = this.__list__.lastIndexOf(key);
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if (index < this.__nextIndex__) return;
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this.__list__.splice(index, 1);
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}),
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_onClear: d(function () {
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clear.call(this.__list__);
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this.__nextIndex__ = 0;
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})
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})));
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Object.defineProperty(PrimitiveMapIterator.prototype, toStringTagSymbol,
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d('c', 'Map Iterator'));
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