https://www.colonscreen.gov.hk/sites/all/modules/kanhan_language_switcher/js/language_switcher.js

1/**
2 * @file
3 * This file controls accessibility functions on the theme layer.
4 * Based on: http://www.acfonline.org.au/sites/all/themes/acf/js/acf.accessibility.js
5 */
6
7 
8var http_check = getHTTPObject();
9
10function getHTTPObject(){ 
11  //Create a boolean variable to check for a valid Internet Explorer instance.
12	var xmlhttp = false;
13	//Check if we are using IE.
14	try {
15	  //If the Javascript version is greater than 5.
16	  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
17	} catch (e) {
18	  //If not, then use the older active x object.
19		try {
20		  //If we are using Internet Explorer.
21		  xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
22		} catch (E) {
23			//Else we must be using a non-IE browser.
24			xmlhttp = false;
25		}
26	}
27	//If we are using a non-IE browser, create a javascript instance of the object.
28	if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {
29		xmlhttp = new XMLHttpRequest();
30	}
31	 
32  return xmlhttp;
33}
34
35function check_file(path_of_file,toLang) 
36{
37	var path_of_file2=path_of_file;
38	if(path_of_file2.indexOf("?")!=-1) {
39		var checkQ=-1;
40		checkQ=path_of_file2.indexOf("?");
41		path_of_file2=path_of_file2.substring(0,checkQ);
42	} else if(path_of_file2.indexOf("#")!=-1) {
43		var checkQ=-1;
44		checkQ=path_of_file2.indexOf("#");
45		path_of_file2=path_of_file2.substring(0,checkQ);
46	} 
47
48	http_check.open("Get",path_of_file2,true);
49	
50	http_check.onreadystatechange = handleHttpResponse_check;
51	
52	http_check.send(null);
53
54	function handleHttpResponse_check()
55	{
56		if(http_check.readyState == 4){
57			if (http_check.status == 200) {
58				location.href = path_of_file;
59			}else if (http_check.status == 404) {
60				if(toLang=="tc"){
61					window.alert("這頁沒有中文版。");
62				}else if(toLang=="sc"){
63					window.alert("这页没有中文版。");
64				}else if(toLang=="en"){
65					window.alert("This webpage does not have English version.");
66				}
67			}
68		}
69	}
70}
71
72function changeVer(lang) {
73	var hanweb = 'hanweb.kanhan.com/TuniS/';
74	var langKey = ["tc", "sc", "en", "txt"];
75	var langs = ["tc", "sc", "en", "txt"];
76	var fromLang = '';
77	var toLang = '';
78	for(counter = 0; counter < langKey.length; counter++){
79		//if(location.href.search(window.location.host+'/'+langs[counter])!= -1){
80		if(location.href.search('/'+langs[counter]+'/')!= -1){
81			fromLang = langs[counter];
82		}
83	}
84	for(counter = 0; counter < langKey.length; counter++){
85		if(langKey[counter]==lang){
86			toLang = langs[counter];
87		}
88	}
89	
90	//window.alert("from "+fromLang+" version to "+toLang+".");
91	
92	if(location.href=='http://'+window.location.host||location.href=='http://'+window.location.host+'/'){ 
93		location.href = '/'+toLang+'/index.htm';
94	}else if(location.href=='http://'+window.location.host+'/'+fromLang+'/'){ 
95		check_file(location.href.replace('/'+fromLang+'/', '/'+toLang+'/index.htm'),toLang);
96	}else if(location.href=='http://'+window.location.host+'/'+fromLang){ 
97		check_file(location.href.replace('/'+fromLang, '/'+toLang+'/index.htm'),toLang); 
98	}else if(fromLang==''){ 
99		check_file(location.href.replace(window.location.host+'/', window.location.host+'/'+toLang+'/index.htm'),toLang);
100	}
101	else if (lang=='txt'){
102		
103		/* for .../textonly/...
104		if (location.href.indexOf("/"+toLang+"/") !=-1) {
105			check_file(location.href.replace('/'+toLang, ''),toLang);
106		}
107		else {
108			check_file(location.href.replace('/'+fromLang, '/'+toLang+'/'+fromLang),toLang);
109		}
110		*/
111		//var appendQStr = "textonly=1";
112		var appendQStr = "/text/";
113		if (location.href.indexOf(""+appendQStr) !=-1) {
114			//alert(1);
115			//check_file(location.href.replace(""+appendQStr, ''),toLang);
116			location.href = location.href.replace('/'+fromLang+'/text', '/'+fromLang);
117		}
118		else if (location.href.indexOf(appendQStr) !=-1) {
119			//alert(2);
120			//check_file(location.href.replace(appendQStr, ''),toLang);
121			location.href = location.href.replace('/'+fromLang+'/text', '/'+fromLang);
122		}
123		else {
124			if (location.href.indexOf("")!=-1) {
125				
126				//check_file(location.href.replace(/(#.*)/, '') + "&"+appendQStr, toLang);
127				location.href = location.href.replace('/'+fromLang, '/'+fromLang+'/text');
128				//location.href + "&"+appendQStr;
129			} else {
130				
131				//check_file(location.href.replace(/(#.*)/, '') + ""+appendQStr, toLang);
132				location.href = location.href.replace('/'+fromLang, '/'+fromLang+'/text');
133				//return location.href + "?"+appendQStr;
134			}
135		
136		}
137		
138	}
139	/*
140	//hanweb
141	else if (lang=='sc') {
142		var url = location.href.replace('/'+fromLang, '/tc');
143		//401 (Unauthorized)
144		//check_file(url.replace(/(http:\/\/)/, '$1hanweb.kanhan.com/TuniS/'),toLang);
145		location.href = url.replace(/(http:\/\/)/, '$1'+hanweb);
146	}
147	else if (fromLang=='tc' && toLang =='tc' || fromLang=='tc' && toLang =='en') {
148		location.href = location.href.replace(hanweb, '').replace('/'+fromLang, '/'+toLang);
149	}
150	//end hanweb
151	*/
152	else{
153		check_file(location.href.replace('/'+fromLang, '/'+toLang),toLang);
154	}
155}
156
157(function ($) {
158  
159/*
160 * @function languageSwitcher
161 * Controls the language switch
162 */ 
163Drupal.behaviors.languageSwitcher = {
164  attach: function (context, settings) {
165  
166	}
167};
168
169}(jQuery));