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<?php
/**
 * Smarty plugin to format text blocks
 *
 * @package Smarty
 * @subpackage PluginsBlock
 */

/**
 * Smarty {textformat}{/textformat} block plugin
 * 
 * Type:     block function<br>
 * Name:     textformat<br>
 * Purpose:  format text a certain way with preset styles
 *            or custom wrap/indent settings<br>
 * 
 * @link http://smarty.php.net/manual/en/language.function.textformat.php {textformat}
 *       (Smarty online manual)
 * @param array $params parameters
 * <pre>
 * Params:   style: string (email)
 *            indent: integer (0)
 *            wrap: integer (80)
 *            wrap_char string ("\n")
 *            indent_char: string (" ")
 *            wrap_boundary: boolean (true)
 * </pre>
 * @author Monte Ohrt <monte at ohrt dot com> 
 * @param string $content contents of the block
 * @param object $template template object
 * @param boolean &$repeat repeat flag
 * @return string content re-formatted
 */
function smarty_block_textformat($params, $content, $template, &$repeat)
{
    if (is_null($content)) {
        return;
    } 

    $style = null;
    $indent = 0;
    $indent_first = 0;
    $indent_char = ' ';
    $wrap = 80;
    $wrap_char = "\n";
    $wrap_cut = false;
    $assign = null;

    foreach ($params as $_key => $_val) {
        switch ($_key) {
            case 'style':
            case 'indent_char':
            case 'wrap_char':
            case 'assign':
                $$_key = (string)$_val;
                break;

            case 'indent':
            case 'indent_first':
            case 'wrap':
                $$_key = (int)$_val;
                break;

            case 'wrap_cut':
                $$_key = (bool)$_val;
                break;

            default:
                trigger_error("textformat: unknown attribute '$_key'");
        } 
    } 

    if ($style == 'email') {
        $wrap = 72;
    } 
    // split into paragraphs
    $_paragraphs = preg_split('![\r\n][\r\n]!', $content);
    $_output = '';

    for($_x = 0, $_y = count($_paragraphs); $_x < $_y; $_x++) {
        if ($_paragraphs[$_x] == '') {
            continue;
        } 
        // convert mult. spaces & special chars to single space
        $_paragraphs[$_x] = preg_replace(array('!\s+!', '!(^\s+)|(\s+$)!'), array(' ', ''), $_paragraphs[$_x]); 
        // indent first line
        if ($indent_first > 0) {
            $_paragraphs[$_x] = str_repeat($indent_char, $indent_first) . $_paragraphs[$_x];
        } 
        // wordwrap sentences
        $_paragraphs[$_x] = wordwrap($_paragraphs[$_x], $wrap - $indent, $wrap_char, $wrap_cut); 
        // indent lines
        if ($indent > 0) {
            $_paragraphs[$_x] = preg_replace('!^!m', str_repeat($indent_char, $indent), $_paragraphs[$_x]);
        } 
    } 
    $_output = implode($wrap_char . $wrap_char, $_paragraphs);
    
    return $assign ? $template->assign($assign, $_output) : $_output;
} 

?>