Feature for diffing any two revisions.

diff --git a/includes/PageHistory.php b/includes/PageHistory.php
index df5a580..58a4a21 100644 (file)
--- a/includes/PageHistory.php
+++ b/includes/PageHistory.php
@@ -93,8 +93,36 @@ class PageHistory {
 
        function beginHistoryList()
        {
+               global $wgTitle;
                $this->lastdate = $this->lastline = "";
                $s = "\n<p>" . wfMsg( "histlegend" ) . "\n<ul>";
+               $url = wfLocalUrl( $wgTitle->getPrefixedText(), "dummy=1");
+               $s .= "<SCRIPT>
+                       var sel = -1;
+                       function anysel(oid){ 
+                               row = document.getElementById(\"ver\" + oid);
+                               if( row.selected ){
+                                       row.style.backgroundColor=row.oldbg; 
+                                       row.selected = 0;
+                                       sel = -1;
+                               } else {
+                                       row.oldbg = row.style.backgroundColor;
+                                       row.style.backgroundColor=\"lightgrey\"; 
+                                       row.selected = 1;
+                                       if( sel == -1){
+                                               sel = oid;
+                                       } else {
+                                               dodiff(sel, oid);
+                                       }
+                               }
+                               return false; 
+                       } 
+                       function dodiff(v1, v2){
+                               if(v2 > v1){ tmp = v1; v1 = v2; v2 = tmp; }
+                               u = \"{$url}&diff=\" + v1 + \"&oldid=\" + v2;
+                               location.href=u;
+                       }
+               </SCRIPT>";
                return $s;
        }
 
@@ -146,13 +174,13 @@ class PageHistory {
                } else {
                        $curlink = $cur;
                }
-               $s .= "({$curlink}) (!OLDID!{$oid}!) . .";
-
+               $any .= "<INPUT TYPE=CHECKBOX onClick='anysel($oid)' TITLE='Select any two versions to diff them'>";
+               $s .= "({$curlink}) (!OLDID!{$oid}!) $any. .";
                $M = wfMsg( "minoreditletter" );
                if ( $isminor ) {
                        $s .= " <strong>{$M}</strong>";
                }
-               $s .= " {$link} . . {$ul}";
+               $s .= " <span ID='ver$oid'>{$link} . . {$ul}</span>";
 
                if ( "" != $c && "*" != $c ) {
                        $s .= " <em>(" . wfEscapeHTML($c) . ")</em>";