Faster DiffRenderSource() when a huge number of lines is deleted or added, eg. fixing spam/deface of large pages.

git-svn-id: svn://pmwiki.org/pmwiki/trunk@2687 524c5546-5005-0410-9a3e-e25e191bd360

1 files changed, 3 insertions, 2 deletions

diff --git a/scripts/pagerev.php b/scripts/pagerev.php
index 9613fc97..f1bdbfeb 100644
--- a/scripts/pagerev.php
+++ b/scripts/pagerev.php
@@ -163,14 +163,15 @@ function DiffRenderSource($in, $out, $which) {
     $a = $which? $out : $in;
     return str_replace("\n","<br />",htmlspecialchars(join("\n",$a)));  
   }
+  $countdifflines = abs(count($in)-count($out));
   $lines = $cnt = $x2 = $y2 = array();
   foreach($in as $line) {
-    $tmp = DiffPrepareInline($line);
+    $tmp = $countdifflines>20 ? array($line) : DiffPrepareInline($line);
     if(!$which) $cnt[] = array(count($x2), count($tmp));
     $x2 = array_merge($x2, $tmp);
   }
   foreach($out as $line) {
-    $tmp = DiffPrepareInline($line);
+    $tmp = $countdifflines>20 ? array($line) : DiffPrepareInline($line);
     if($which) $cnt[] = array(count($y2), count($tmp));
     $y2 = array_merge($y2, $tmp);
   }