sortedlist.js

初学者

/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/



dojo.provide("dojo.collections.SortedList");
dojo.require("dojo.collections.Collections");
dojo.collections.SortedList = function (dictionary) {
	var _this = this;
	var items = {};
	var q = [];
	var sorter = function (a, b) {
		if (a.key > b.key) {
			return 1;
		}
		if (a.key < b.key) {
			return -1;
		}
		return 0;
	};
	var build = function () {
		q = [];
		var e = _this.getIterator();
		while (!e.atEnd()) {
			q.push(e.get());
		}
		q.sort(sorter);
	};
	var testObject = {};
	this.count = q.length;
	this.add = function (k, v) {
		if (!items[k]) {
			items[k] = new dojo.collections.DictionaryEntry(k, v);
			this.count = q.push(items[k]);
			q.sort(sorter);
		}
	};
	this.clear = function () {
		items = {};
		q = [];
		this.count = q.length;
	};
	this.clone = function () {
		return new dojo.collections.SortedList(this);
	};
	this.contains = this.containsKey = function (k) {
		if (testObject[k]) {
			return false;
		}
		return (items[k] != null);
	};
	this.containsValue = function (o) {
		var e = this.getIterator();
		while (!e.atEnd()) {
			var item = e.get();
			if (item.value == o) {
				return true;
			}
		}
		return false;
	};
	this.copyTo = function (arr, i) {
		var e = this.getIterator();
		var idx = i;
		while (!e.atEnd()) {
			arr.splice(idx, 0, e.get());
			idx++;
		}
	};
	this.entry = function (k) {
		return items[k];
	};
	this.forEach = function (fn, scope) {
		var s = scope || dj_global;
		if (Array.forEach) {
			Array.forEach(q, fn, s);
		} else {
			for (var i = 0; i < q.length; i++) {
				fn.call(s, q[i], i, q);
			}
		}
	};
	this.getByIndex = function (i) {
		return q[i].valueOf();
	};
	this.getIterator = function () {
		return new dojo.collections.DictionaryIterator(items);
	};
	this.getKey = function (i) {
		return q[i].key;
	};
	this.getKeyList = function () {
		var arr = [];
		var e = this.getIterator();
		while (!e.atEnd()) {
			arr.push(e.get().key);
		}
		return arr;
	};
	this.getValueList = function () {
		var arr = [];
		var e = this.getIterator();
		while (!e.atEnd()) {
			arr.push(e.get().value);
		}
		return arr;
	};
	this.indexOfKey = function (k) {
		for (var i = 0; i < q.length; i++) {
			if (q[i].key == k) {
				return i;
			}
		}
		return -1;
	};
	this.indexOfValue = function (o) {
		for (var i = 0; i < q.length; i++) {
			if (q[i].value == o) {
				return i;
			}
		}
		return -1;
	};
	this.item = function (k) {
		if (k in items && !testObject[k]) {
			return items[k].valueOf();
		}
		return undefined;
	};
	this.remove = function (k) {
		delete items[k];
		build();
		this.count = q.length;
	};
	this.removeAt = function (i) {
		delete items[q[i].key];
		build();
		this.count = q.length;
	};
	this.replace = function (k, v) {
		if (!items[k]) {
			this.add(k, v);
			return false;
		} else {
			items[k] = new dojo.collections.DictionaryEntry(k, v);
			q.sort(sorter);
			return true;
		}
	};
	this.setByIndex = function (i, o) {
		items[q[i].key].value = o;
		build();
		this.count = q.length;
	};
	if (dictionary) {
		var e = dictionary.getIterator();
		while (!e.atEnd()) {
			var item = e.get();
			q[q.length] = items[item.key] = new dojo.collections.DictionaryEntry(item.key, item.value);
		}
		q.sort(sorter);
	}
};