<?php
/*
* Smarty plugin
* Type:		modifier
* Name:		highlight_quoted
* Version:	0.1
* Date:		2003-03-13
* Author:	Joscha Feth, hide@address.com, www.feth.com
* Purpose:	highlights a typical news message, like:
*		>>>>> Quote level 5
*		>>>> Quote level 4
*		>>> Quote level 3
*		>> Quote level 2
*		> Quote level 1
*		Quote level 0
* Usage:	In the template, use
*		{$text|highlight_quoted}	if you want to color
*						messages beginning with
*						indenters | or >
*						and output with indenter: >
*		or
*		{$text|highlight_quoted:0:"-_"} if the text is indented with - or _ and not
escaped
* Params:
*		string	text		the text to highlight
*		int	escape		determines if the HTML special chars
*					in the indented text shall be escaped, default: true
*		string	indenter	the indenter, with which the text
*					shall be indented, default: > and |
*		array	colors		the colors for highlighting the different levels.
*					array is looped through from low to high.
*					default: google groups standard
* Install:	Drop into the plugin directory
*/

function smarty_modifier_highlight_quoted($text, $escape = true, $indenter =
'|>',$colors = false)
{
    if(!is_array($colors)) {
        $colors = array();
        $colors[] = "#000000";
        $colors[] = "#0000BB";
        $colors[] = "#681E80";
        $colors[] = "#0070FF";
        $colors[] = "#C67900";
        $colors[] = "#008800";
        $colors[] = "#FF3333";
    }
    $matches = array();
    preg_match_all(    '/^([ '.preg_quote($indenter).']*)(.*)/m',
                    $text,
                    $matches,
                    PREG_SET_ORDER);
    $ret = "";
    foreach($matches AS $match) {
        if ($escape) {
            $match[2]    =    htmlspecialchars($match[2]);
        }
        $line = trim($match[2]);
        if ($line) {
            $indent =    strlen(preg_replace('/[\s]*/','',$match[1]));
            $color  =    $indent % count($colors);
            $ret   .=    '<font color="'.$colors[$color].'">';
            $ret   .=    htmlspecialchars($match[1])." ";
            $ret   .=    $line;
            $ret   .=    "</font>\n";
        } else {
            $ret   .=   "\n";
        }
    }
    return $ret;
}
?>