User:Mike.lifeguard/enhancedUndelete.js

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// Enhanced Undelete Tool
// Stolen from Wikibooks created & Maintained by [[b:User:Darklama]] and [[b:User:Mike.lifeguard]]
//
// Adds a "Select All" and "Invert Selection" button to Special:Undelete. 
// Used for administrators only.
 
function enhancedUndelete() {
	if (wgCanonicalSpecialPageName != "Undelete")
		return;
	var fi = document.getElementsByTagName("input");
	for (i = 0; i < fi.length; i++){
		if (!fi[i].hasAttribute("type")) continue;
		if (fi[i].getAttribute("type") == "reset") {
			var sa = document.createElement("input");
			sa.setAttribute("type", "button");
			sa.setAttribute("value", "Select All");
			fi[i].parentNode.insertBefore(sa, fi[i].nextSibling);
			sa.onclick = function() {
				for (var i=0;i<fi.length;i++) {
					if (fi[i].hasAttribute("type") && fi[i].getAttribute("type") == "checkbox") {
						fi[i].checked = true;
					}
				}
			};

			// add invert selection button
			var inv = document.createElement("input");
			inv.setAttribute("type", "button");
			inv.setAttribute("value", "Invert All");
			fi[i].parentNode.insertBefore(inv, fi[i].nextSibling);
			inv.onclick=function() {
				// if a deleted edit is checked, uncheck it, and vis-versa.
				for (var i=0;i<fi.length;i++) {
					if (fi[i].hasAttribute("type") && fi[i].getAttribute("type") == "checkbox") {
						fi[i].checked = !fi[i].checked;
					}
				}
			}
		}
		else if (fi[i].getAttribute("type") == "checkbox") {
			fi[i].checked = true;
		}
	}
}

if (wgCanonicalSpecialPageName == "Undelete") addOnloadHook(enhancedUndelete);