<?php

// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
//
// All Rights Reserved. See copyright.txt for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
// $Id$

/**
 * Smarty plugin
 * @package Smarty
 * @subpackage plugins
 *
 * Smarty plugin to make result HTML code smaller
 * In opposite to {strip} this plugin can be used ONCE at top level template
 * to strip all HTML at once... And it have no nasty BUG which is incorrectly
 * join some words together...
 */
function smarty_block_compact($params, $content, $smarty, &$repeat)
{
    if ($repeat) {
        return;
    }
    // Tags with uncompactable content...
    $nct = ['textarea', 'pre'];
    // Replace uncompactable content with unique marks
    $ncc = [];
    $num = 0;
    foreach ($nct as $tag) {
        if (preg_match('/<\s*' . $tag . '.*>(.*)<\/\s*' . $tag . '\s*>/Usi', $content, $ucb) != 0) {
            $mark = md5($ucb[1] . $num++ . microtime());
            $ncc[$mark] = $ucb[1];
            $content = str_replace($ucb[1], $mark, $content);
        }
    }
    // Compact the text
    $content = str_replace('> <', '><', preg_replace('/\s+/', ' ', $content));
    // Insert back all saved tags content
    $ncc = array_reverse($ncc);
    foreach ($ncc as $mark => $text) {
        $content = str_replace($mark, $text, $content);
    }
    return $content;
}