135 lines
2.5 KiB
JavaScript
135 lines
2.5 KiB
JavaScript
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var HashListener = require('./hash-listener');
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/**
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* Class to handle the URL.
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**/
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module.exports =
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{
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_hash: null
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,_hashMap: {}
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,_listener: null
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,initialize: function() {
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this._listener = new HashListener();
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this._hashChangedHandler = this._hashChanged.bind(this);
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window.addEventListener('hashchange', this._hashChangedHandler);
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this._hashChanged();
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}
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,destroy: function() {
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window.removeEventListener('hashchange', this._hashChangedHandler);
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}
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,getListener: function() {
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return this._listener;
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}
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/**
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* Gets the hash part of the URL.
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*
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* @param {string} key The variable name
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**/
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,get: function(key) {
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return this._hashMap[key];
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}
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/**
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* Unsets a hash key.
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*
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* @param {string} key The variable name
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**/
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,unset: function(key) {
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this.add({[key]: undefined});
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}
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/**
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* Sets the hash part of the URL, respecting the current hash variables.
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*
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* @param {Object} map A key-value map
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**/
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,add: function(map) {
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var newMap = this._hashMap;
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for (var key in map)
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newMap[key] = map[key];
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this.set(newMap);
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}
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/**
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* Sets the hash part of the URL.
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*
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* @param {Object} map A key-value map
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**/
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,set: function(map) {
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if (map)
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for (var key in map)
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if (map[key] === null || map[key] === undefined)
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delete map[key];
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var newHash = this.make(map);
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if (!map)
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map = {};
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if (newHash !== this._hash) {
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this._hashMap = map;
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this._hash = newHash;
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this._blockChanged = true;
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location.hash = newHash;
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this._blockChanged = false;
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this._listener.changed();
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}
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}
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/**
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* Creates a URL with the given hash data.
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*
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* @param {Object} map A key-value map
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* @param {boolean} add %true to combine with the current map, %false otherwise
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* @return {String} The URL
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**/
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,make: function(map, add) {
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var hash = '#!';
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if (add && map)
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for (var key in this._hashMap)
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if (!map[key])
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map[key] = this._hashMap[key];
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for (var key in map) {
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if (hash.length > 2)
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hash += '&';
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hash += encodeURIComponent(key) +'='+ encodeURIComponent(map[key]);
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}
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return hash;
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}
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,_hashChanged: function() {
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var newHash = location.hash;
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if (this._blockChanged || newHash === this._hash)
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return;
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var newMap = hashMap = {};
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var kvPairs = newHash.substr(2).split('&');
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for (var i = 0; i < kvPairs.length; i++) {
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var kvPair = kvPairs[i].split('=', 2);
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if (kvPair[0])
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newMap[decodeURIComponent(kvPair[0])] = decodeURIComponent(kvPair[1]);
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}
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this._hashMap = newMap;
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this._hash = newHash;
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this._listener.changed();
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}
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};
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