From df6c6465fdf4b9de5fdd7845429f4e086531dbee Mon Sep 17 00:00:00 2001
From: Dries Buytaert <dries@buytaert.net>
Date: Sun, 24 May 2009 19:12:12 +0000
Subject: - Patch #133188 by John Morahan, frega: make sure that long string
 are line-break-ed correctly.

---
 modules/filter/filter.module | 3 ++-
 modules/filter/filter.test   | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

(limited to 'modules')

diff --git a/modules/filter/filter.module b/modules/filter/filter.module
index 625c28711..45c2b14e5 100644
--- a/modules/filter/filter.module
+++ b/modules/filter/filter.module
@@ -894,7 +894,8 @@ function _filter_autop($text) {
       $chunk = preg_replace('!(<' . $block . '[^>]*>)!', "\n$1", $chunk); // Space things out a little
       $chunk = preg_replace('!(</' . $block . '>)!', "$1\n\n", $chunk); // Space things out a little
       $chunk = preg_replace("/\n\n+/", "\n\n", $chunk); // take care of duplicates
-      $chunk = preg_replace('/\n?(.+?)(?:\n\s*\n|\z)/s', "<p>$1</p>\n", $chunk); // make paragraphs, including one at the end
+      $chunk = preg_replace('/^\n|\n\s*\n$/', '', $chunk);
+      $chunk = '<p>' . preg_replace('/\n\s*\n\n?(.)/', "</p>\n<p>$1", $chunk) . "</p>\n"; // make paragraphs, including one at the end
       $chunk = preg_replace("|<p>(<li.+?)</p>|", "$1", $chunk); // problem with nested lists
       $chunk = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $chunk);
       $chunk = str_replace('</blockquote></p>', '</p></blockquote>', $chunk);
diff --git a/modules/filter/filter.test b/modules/filter/filter.test
index 86e1e556a..3c13cc56d 100644
--- a/modules/filter/filter.test
+++ b/modules/filter/filter.test
@@ -208,6 +208,10 @@ class FilterTestCase extends DrupalWebTestCase {
 
     $f = _filter_autop('<blockquote><pre>aaa</pre></blockquote>');
     $this->assertEqual(substr_count($f, '<p>'), substr_count($f, '</p>'), t('Make sure line breaking produces matching paragraph tags.'));
+
+    $limit = max(ini_get('pcre.backtrack_limit'), ini_get('pcre.recursion_limit'));
+    $f = _filter_autop($this->randomName($limit));
+    $this->assertNotEqual($f, '', t('Make sure line breaking can process long strings.'));
   }
 
   /**
-- 
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