Set WP-Syntax tab width

function wp_syntax_highlight($match)
{
    global $wp_syntax_matches;
 
    $i = intval($match[1]);
    $match = $wp_syntax_matches[$i];
 
    $language = strtolower(trim($match[1]));
    $line = trim($match[2]);
    $escaped = trim($match[3]);
    $code = wp_syntax_code_trim($match[4]);
 
    // INSERT JUST THIS LINE OF CODE
    $code = str_replace ( '\t' , '   ' , $code );
    .
    .
    .

4 thoughts on “Set WP-Syntax tab width”

1. Thank you so much for this! Was driving me mad!
   But after coping your code it just did not work (I have maybe a newer version) so I changed your line to this:

   $code = str_replace ( "\t", ' ' , $code );

   And it works like a charm.

2. Always glad to help. 🙂 Thanks for the hint – I updated the code snippet.

3. I had the same problem derRaab! Replace \t by fixed spaces is not really correct, tab char represent variables space char. I wrote a quickly solution making this two changes in wp-syntax/wp-syntax.php:

   Change 1:

   if ($this->header_type != GESHI_HEADER_PRE && $this->header_type != GESHI_HEADER_PRE_VALID) {
   	$this->indent($parsed_code);
   } else{
   	$this->indentPRE($parsed_code);
   }
   

   Change 2, insert a new funtion for my pre-blocks:

   function indentPRE(&$result) {
   	/// Replace tabs with the correct number of spaces
   	if (false !== strpos($result, "\t")) {
   		$lines = explode("\n", $result);
   		$result = null;//Save memory while we process the lines individually
   		$tab_width = $this->get_real_tab_width();
   		$tab_string = ' ' . str_repeat(' ', $tab_width);
   
   		for ($key = 0, $n = count($lines); $key < $n; $key++) {
   			$line = $lines[$key];
   			if (false === strpos($line, "\t")) {
   				continue;
   			}
   
   			$pos = 0;
   			$length = strlen($line);
   			$lines[$key] = ''; // reduce memory
   
   			
   			for ($i = 0; $i  ' ',
   					//  2 => '  ',
   					//  3 => '   ' etc etc
   					// to use instead of building a string every time
   					$tab_end_width = $tab_width - ($pos % $tab_width); //Moved out of the look as it doesn't change within the loop
   					if (($pos & 1) || 1 == $tab_end_width) {
   						$str .= substr($tab_string, 6, $tab_end_width);
   					} else {
   						$str .= substr($tab_string, 0, $tab_end_width+5);
   					}
   					$lines[$key] .= $str;
   					$pos += $tab_end_width;
   
   					if (false === strpos($line, "\t", $i + 1)) {
   						$lines[$key] .= substr($line, $i + 1);
   						break;
   					}
   					
   				} else if (0 == $pos && ' ' == $char) {
   					$lines[$key] .= ' ';
   					++$pos;
   				} else {
   					$lines[$key] .= $char;
   					++$pos;
   				}
   				
   			}
   		}
   		$result = implode("\n", $lines);
   		unset($lines);//We don't need the lines separated beyond this --- free them!
   	}
   }
   

   This last function is a copy-paste-modify of ident().

   If I didn’t make a mistake this corrected tab’s size (in my case 8 to 4).

4. Thanks in advance Juampa. I’ll give it a try after the next wordpress update…

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