Wikipedia:WikiProject User scripts/Scripts/Compare link
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//
// Compare link
/* In addition to the GFDL:
This function (compare link) is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This function is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
A copy of the GPL is available at http://www.prism.gatech.edu/~mflaschen3/gpl.txt .
By modifying "Wikipedia:WikiProject User scripts/Scripts/Compare link":
You agree to dual-license your contributions under both the GFDL (http://en.wikipedia.org/wiki/WP:GFDL)
and version 2 of the GPL (http://www.prism.gatech.edu/~mflaschen3/gpl.txt) or any later version
of the GPL published by the FSF.
*/
function fixCompare()
{
var histForm=document.getElementsByTagName("form")[0];
var finalButton=document.getElementById("historysubmit");
var firstButton=histForm.getElementsByTagName("input")[1];
histForm.removeChild(finalButton);
histForm.removeChild(firstButton);
var compareLink=document.createElement("a");
var genLink="http://en.wikipedia.org/w/index.php?title=" + histForm.title.value + "&diff=" + histForm.diff[0].value + "&oldid=" + histForm.oldid[1].value;
compareLink.setAttribute("href", genLink);
compareLink.appendChild(document.createTextNode("Compare selected versions"));
histForm.insertBefore(compareLink, document.getElementById("pagehistory"));
var endLink=compareLink.cloneNode(true);
histForm.appendChild(endLink);
var diffList=document.getElementById("pagehistory");
diffList.setAttribute("onchange", "updateCompare()");
}
function updateCompare()
{
var histForm=document.getElementsByTagName("form")[0];
var diffList=document.getElementById("pagehistory");
var compareLink=diffList.previousSibling;
var endLink=diffList.nextSibling;
var oldInd=-1;
var i=0;
while(oldInd==-1 & i<histForm.oldid.length)
{
if(histForm.oldid[i].checked)
oldInd=i;
i++;
}
var diffInd=-1;
var j=0;
while(diffInd==-1 & j<histForm.diff.length)
{
if(histForm.diff[j].checked)
diffInd=j;
j++;
}
var genLink="http://en.wikipedia.org/w/index.php?title=" + histForm.title.value + "&diff=" + histForm.diff[diffInd].value + "&oldid=" + histForm.oldid[oldInd].value;
compareLink.setAttribute("href", genLink);
endLink.setAttribute("href", genLink);
}
if(window.location.href.indexOf("action=history")!=-1)
addOnloadHook(fixCompare);
//
