Changeset 20493 for branches/3.3/wp-includes/formatting.php

Timestamp:

04/17/2012 08:02:49 PM (13 years ago)

Author:

ryan

Message:

Don't attempt to make links inside attributes clickable.

Location:

branches/3.3

Files:

• . (modified) (1 prop)
• wp-includes/formatting.php (modified) (2 diffs)

branches/3.3/wp-includes/formatting.php

@@ -1351 +1351 @@
 function _make_url_clickable_cb($matches) {
     $url = $matches[2];
-    $suffix = '';
-
-    /** Include parentheses in the URL only if paired **/
+
+    if ( ')' == $matches[3] && strpos( $url, '(' ) ) {
+        // If the trailing character is a closing parethesis, and the URL has an opening parenthesis in it, add the closing parenthesis to the URL.
+        // Then we can let the parenthesis balancer do its thing below.
+        $url .= $matches[3];
+        $suffix = '';
+    } else {
+        $suffix = $matches[3];
+    }
+
+    // Include parentheses in the URL only if paired
     while ( substr_count( $url, '(' ) < substr_count( $url, ')' ) ) {
         $suffix = strrchr( $url, ')' ) . $suffix;
@@ -1419 +1427 @@
  * @since 0.71
  *
- * @param string $ret Content to convert URIs.
+ * @param string $text Content to convert URIs.
  * @return string Content with converted URIs.
  */
-function make_clickable($ret) {
-    $ret = ' ' . $ret;
-    // in testing, using arrays here was found to be faster
-    $save = @ini_set('pcre.recursion_limit', 10000);
-    $retval = preg_replace_callback('#(?<!=[\'"])(?<=[*\')+.,;:!&$\s>])(\()?([\w]+?://(?:[\w\\x80-\\xff\#%~/?@\[\]-]{1,2000}|[\'*(+.,;:!=&$](?![\b\)]|(\))?([\s]|$))|(?(1)\)(?![\s<.,;:]|$)|\)))+)#is', '_make_url_clickable_cb', $ret);
-    if (null !== $retval )
-        $ret = $retval;
-    @ini_set('pcre.recursion_limit', $save);
-    $ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret);
-    $ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret);
-    // this one is not in an array because we need it to run last, for cleanup of accidental links within links
-    $ret = preg_replace("#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i", "$1$3</a>", $ret);
-    $ret = trim($ret);
-    return $ret;
+function make_clickable( $text ) {
+    $r = '';
+    $textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags
+    foreach ( $textarr as $piece ) {
+        if ( empty( $piece ) || ( $piece[0] == '<' && ! preg_match('|^<\s*[\w]{1,20}+://|', $piece) ) ) {
+            $r .= $piece;
+            continue;
+        }
+
+        // Long strings might contain expensive edge cases ...
+        if ( 10000 < strlen( $piece ) ) {
+            // ... break it up
+            foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses
+                if ( 2101 < strlen( $chunk ) ) {
+                    $r .= $chunk; // Too big, no whitespace: bail.
+                } else {
+                    $r .= make_clickable( $chunk );
+                }
+            }
+        } else {
+            $ret = " $piece "; // Pad with whitespace to simplify the regexes
+
+            $url_clickable = '~
+                ([\\s(<.,;:!?])                                        # 1: Leading whitespace, or punctuation
+                (                                                      # 2: URL
+                    [\\w]{1,20}+://                                # Scheme and hier-part prefix
+                    (?=\S{1,2000}\s)                               # Limit to URLs less than about 2000 characters long
+                    [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+         # Non-punctuation URL character
+                    (?:                                            # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character
+                        [\'.,;:!?)]                            # Punctuation URL character
+                        [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character
+                    )*
+                )
+                (\)?)                                                  # 3: Trailing closing parenthesis (for parethesis balancing post processing)
+            ~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character.
+                  // Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times.
+
+            $ret = preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $ret );
+
+            $ret = preg_replace_callback( '#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret );
+            $ret = preg_replace_callback( '#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret );
+
+            $ret = substr( $ret, 1, -1 ); // Remove our whitespace padding.
+            $r .= $ret;
+        }
+    }
+
+    // Cleanup of accidental links within links
+    $r = preg_replace( '#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r );
+    return $r;
+}
+
+/**
+ * Breaks a string into chunks by splitting at whitespace characters.
+ * The length of each returned chunk is as close to the specified length goal as possible,
+ * with the caveat that each chunk includes its trailing delimiter.
+ * Chunks longer than the goal are guaranteed to not have any inner whitespace.
+ *
+ * Joining the returned chunks with empty delimiters reconstructs the input string losslessly.
+ *
+ * Input string must have no null characters (or eventual transformations on output chunks must not care about null characters)
+ *
+ * <code>
+ * _split_str_by_whitespace( "1234 67890 1234 67890a cd 1234   890 123456789 1234567890a    45678   1 3 5 7 90 ", 10 ) ==
+ * array (
+ *   0 => '1234 67890 ',  // 11 characters: Perfect split
+ *   1 => '1234 ',        //  5 characters: '1234 67890a' was too long
+ *   2 => '67890a cd ',   // 10 characters: '67890a cd 1234' was too long
+ *   3 => '1234   890 ',  // 11 characters: Perfect split
+ *   4 => '123456789 ',   // 10 characters: '123456789 1234567890a' was too long
+ *   5 => '1234567890a ', // 12 characters: Too long, but no inner whitespace on which to split
+ *   6 => '   45678   ',  // 11 characters: Perfect split
+ *   7 => '1 3 5 7 9',    //  9 characters: End of $string
+ * );
+ * </code>
+ *
+ * @since 3.4.0
+ * @access private
+ *
+ * @param string $string The string to split
+ * @param    int $goal   The desired chunk length.
+ * @return array Numeric array of chunks.
+ */
+function _split_str_by_whitespace( $string, $goal ) {
+    $chunks = array();
+
+    $string_nullspace = strtr( $string, "\r\n\t\v\f ", "\000\000\000\000\000\000" );
+
+    while ( $goal < strlen( $string_nullspace ) ) {
+        $pos = strrpos( substr( $string_nullspace, 0, $goal + 1 ), "\000" );
+
+        if ( false === $pos ) {
+            $pos = strpos( $string_nullspace, "\000", $goal + 1 );
+            if ( false === $pos ) {
+                break;
+            }
+        }
+
+        $chunks[] = substr( $string, 0, $pos + 1 );
+        $string = substr( $string, $pos + 1 );
+        $string_nullspace = substr( $string_nullspace, $pos + 1 );
+    }
+
+    if ( $string ) {
+        $chunks[] = $string;
+    }
+
+    return $chunks;
 }