User:Anomie/reftooltip.js

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/* Script to footnote text to the tooltips on footnote links. Adapted from http://en.wikipedia.org/w/index.php?title=Wikipedia:Village_pump_%28proposals%29&diff=171682254&oldid=171670562
 
If you want to use this script, simply add the following line to your monobook.js:
 
importScript('User:Anomie/reftooltip.js'); // Linkback: [[User:Anomie/reftooltip.js]]
 
(Please keep the comment so I can see how many people use this). */
 
function RefTooltips(){
    // Get list of footnote links (they all have class: 'reference')
    var r=getElementsByClassName(document.body, "SUP", "reference");
    var a, r, n;
    for(var i=r.length-1; i>=0; i--){
        if(a=r[i].getElementsByTagName("a")[0]){
            if(n=document.getElementById(a.href.substr(a.href.indexOf("#")+1))){
                n=n.textContent || n.innerText || "";
                // Strip the "^" linkback indicator
                if(n.substr(0,2)=='^ ') n=n.substr(2);
                // Multiply used refs have letters for each use. Strip them too, or at least the first 701 of them.
                loop: do {
                    for(var c1=97; c1<123; c1++){
                        if(n.charCodeAt(0)!=c1 || n.charAt(1)!=' ') break loop;
                        n=n.substr(2);
                    }
                    for(var c1=97; c1<123; c1++){
                        for(var c2=97; c2<123; c2++){
                            if(n.charCodeAt(0)!=c1 || n.charCodeAt(1)!=c2 || n.charAt(2)!=' ') break loop;
                            n=n.substr(3);
                        }
                    }
                } while(false);
                a.title=n;
            }
        }
    }
}
 
if(doneOnloadHook) RefTooltips(); //if imported dynamically
else addOnloadHook(RefTooltips);