https://www.issm.info/components/com_droppics/assets/js/droppicsHelper.js

1/** 
2 * Droppics
3 * 
4 * We developed this code with our hearts and passion.
5 * We hope you found it useful, easy to understand and to customize.
6 * Otherwise, please feel free to contact us at [email protected] *
7 * @package Droppics
8 * @copyright Copyright (C) 2013 JoomUnited (http://www.joomunited.com). All rights reserved.
9 * @copyright Copyright (C) 2013 Damien Barrère (http://www.crac-design.com). All rights reserved.
10 * @license GNU General Public License version 2 or later; http://www.gnu.org/licenses/gpl-2.0.html
11 */
12
13/* Based on the work : http://www.javascriptkit.com/javatutors/loadjavascriptcss2.shtml */
14
15var filesadded = "";
16var stylesadded = "";
17window.droppicsHeadLoaded = true;
18
19function loadHeadFiles(files){
20    window.droppicsHeadLoaded = false;
21    files = eval(files);
22    for (var i = 0; i < files.length; ++i) {
23        loadHeadFile(files[i][0],files[i][1]);
24    }
25    window.droppicsHeadLoaded = true;
26}
27
28function loadHeadFile(filename, filetype){
29    if (filesadded.indexOf("["+filename+"]")>0){
30        return 1;
31    }
32    if (filetype=="js"){
33        var fileref=document.createElement('script');
34        fileref.setAttribute("type","text/javascript");
35        fileref.setAttribute("src", filename);
36    }else if (filetype=="css"){
37        var fileref=document.createElement("link");
38        fileref.setAttribute("rel", "stylesheet");
39        fileref.setAttribute("type", "text/css");
40        fileref.setAttribute("href", filename);
41    }
42    if (typeof fileref!=="undefined"){
43        document.getElementsByTagName("head")[0].appendChild(fileref);
44        filesadded+="["+filename+"]";
45        return true;
46    }
47    return false;
48}
49
50function unloadHeadFile(filename, filetype){
51    if(typeof filename==='undefined') return;
52    if(filename==='') return;
53    if(typeof filetype==='undefined'){
54        unloadHeadFile(filename,'css');
55        unloadHeadFile(filename,'js');
56    }else{
57        var targetelement=(filetype=="js")? "script" : (filetype=="css")? "link" : "none"; //determine element type to create nodelist from
58        var targetattr=(filetype=="js")? "src" : (filetype=="css")? "href" : "none"; //determine corresponding attribute to test for
59        var allsuspects=document.getElementsByTagName(targetelement);
60        for (var i=allsuspects.length; i>=0; i--){ //search backwards within nodelist for matching elements to remove
61            if (allsuspects[i] && allsuspects[i].getAttribute(targetattr)!=null && allsuspects[i].getAttribute(targetattr).indexOf(filename)!=-1){
62                allsuspects[i].parentNode.removeChild(allsuspects[i]); //remove element by calling parentNode.removeChild()
63                filesadded = filesadded.replace("["+filename+"]","");
64            }
65        }
66    }
67}
68
69function unloadHeadFiles(){
70    if(filesadded==='') return;
71    files = filesadded.split("][");
72    for (var i=0; i < files.length; i++){
73        files[i] = files[i].replace("[","");
74        files[i] = files[i].replace("]","");
75        unloadHeadFile(files[i]);
76    }
77}
78
79function loadHeadStyle(content,id){
80    var fileref=document.createElement("style");
81        fileref.setAttribute("type", "text/css");
82        fileref.setAttribute("id", id);
83        fileref.innerHTML =content;
84        document.getElementsByTagName("head")[0].appendChild(fileref);
85        stylesadded+="["+id+"]";
86}
87
88function unloadStyles(){
89    files = str.split(stylesadded);
90    for (var style in styles){
91        style = style.replace("[","");
92        style = style.replace("]","");
93        unloadStyleId(style);
94    }
95}
96
97function unloadStyleId(id){
98    elem=document.getElementById(id);
99    if(elem){
100        elem.parentNode.removeChild(elem);
101    }
102}
103
104function addParameter(parameterName, parameterValue) {
105    var url = pathname;
106    replaceDuplicates = true;
107    if (url.indexOf('#') > 0) {
108        var cl = url.indexOf('#');
109        urlhash = url.substring(url.indexOf('#'), url.length);
110        urlhash = parameterValue+'-'+ parameterName + "&"+urlhash;
111    } else {
112        urlhash = parameterValue+'-'+ parameterName;
113        cl = url.length;
114    }
115    sourceUrl = url.substring(0, cl);
116
117    return sourceUrl + '#'+ urlhash;
118
119}
120
121//if no ie support maybe see http://stackoverflow.com/questions/1184950/dynamically-loading-css-stylesheet-

121doesnt-work-on-ie