mirror of
https://github.com/Doodle3D/Doodle3D-API
synced 2024-12-23 22:13:48 +01:00
89 lines
2.3 KiB
JavaScript
89 lines
2.3 KiB
JavaScript
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/* */
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'use strict';
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var $ = require("./$"),
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safe = require("./$.uid").safe,
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assert = require("./$.assert"),
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forOf = require("./$.for-of"),
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$has = $.has,
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isObject = $.isObject,
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hide = $.hide,
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isExtensible = Object.isExtensible || isObject,
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id = 0,
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ID = safe('id'),
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WEAK = safe('weak'),
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LEAK = safe('leak'),
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method = require("./$.array-methods"),
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find = method(5),
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findIndex = method(6);
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function findFrozen(store, key) {
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return find(store.array, function(it) {
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return it[0] === key;
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});
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}
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function leakStore(that) {
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return that[LEAK] || hide(that, LEAK, {
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array: [],
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get: function(key) {
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var entry = findFrozen(this, key);
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if (entry)
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return entry[1];
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},
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has: function(key) {
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return !!findFrozen(this, key);
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},
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set: function(key, value) {
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var entry = findFrozen(this, key);
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if (entry)
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entry[1] = value;
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else
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this.array.push([key, value]);
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},
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'delete': function(key) {
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var index = findIndex(this.array, function(it) {
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return it[0] === key;
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});
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if (~index)
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this.array.splice(index, 1);
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return !!~index;
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}
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})[LEAK];
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}
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module.exports = {
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getConstructor: function(wrapper, NAME, IS_MAP, ADDER) {
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var C = wrapper(function(that, iterable) {
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$.set(assert.inst(that, C, NAME), ID, id++);
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if (iterable != undefined)
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forOf(iterable, IS_MAP, that[ADDER], that);
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});
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require("./$.mix")(C.prototype, {
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'delete': function(key) {
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if (!isObject(key))
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return false;
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if (!isExtensible(key))
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return leakStore(this)['delete'](key);
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return $has(key, WEAK) && $has(key[WEAK], this[ID]) && delete key[WEAK][this[ID]];
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},
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has: function has(key) {
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if (!isObject(key))
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return false;
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if (!isExtensible(key))
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return leakStore(this).has(key);
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return $has(key, WEAK) && $has(key[WEAK], this[ID]);
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}
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});
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return C;
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},
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def: function(that, key, value) {
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if (!isExtensible(assert.obj(key))) {
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leakStore(that).set(key, value);
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} else {
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$has(key, WEAK) || hide(key, WEAK, {});
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key[WEAK][that[ID]] = value;
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}
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return that;
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},
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leakStore: leakStore,
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WEAK: WEAK,
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ID: ID
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};
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