<?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>

 * Params:

 * <pre>

 * - style         - string (email)

 * - indent        - integer (0)

 * - wrap          - integer (80)

 * - wrap_char     - string ("\n")

 * - indent_char   - string (" ")

 * - wrap_boundary - boolean (true)

 * </pre>

 *

 * @link   http://www.smarty.net/manual/en/language.function.textformat.php {textformat}

 *         (Smarty online manual)

 *

 * @param array $params parameters

 * @param string $content contents of the block

 * @param Smarty_Internal_Template $template template object

 * @param boolean &$repeat repeat flag

 *

 * @return string content re-formatted

 * @author Monte Ohrt <monte at ohrt dot com>

 */

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]{2}!', $content);

    foreach ($_paragraphs as &$_paragraph) {

        if (!$_paragraph) {

            continue;

        }

        // convert mult. spaces & special chars to single space

        $_paragraph = preg_replace(array('!\s+!' . Smarty::$_UTF8_MODIFIER, '!(^\s+)|(\s+$)!' . Smarty::$_UTF8_MODIFIER), array(' ', ''), $_paragraph);

        // indent first line

        if ($indent_first > 0) {

            $_paragraph = str_repeat($indent_char, $indent_first) . $_paragraph;

        }

        // wordwrap sentences

        if (Smarty::$_MBSTRING) {

            require_once(SMARTY_PLUGINS_DIR . 'shared.mb_wordwrap.php');

            $_paragraph = smarty_mb_wordwrap($_paragraph, $wrap - $indent, $wrap_char, $wrap_cut);

        } else {

            $_paragraph = wordwrap($_paragraph, $wrap - $indent, $wrap_char, $wrap_cut);

        }

        // indent lines

        if ($indent > 0) {

            $_paragraph = preg_replace('!^!m', str_repeat($indent_char, $indent), $_paragraph);

        }

    }

    $_output = implode($wrap_char . $wrap_char, $_paragraphs);

    if ($assign) {

        $template->assign($assign, $_output);

    } else {

        return $_output;

    }

}