<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category  Zend

 * @package   Zend_Text

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license   http://framework.zend.com/license/new-bsd     New BSD License

 * @version   $Id: MultiByte.php 24762 2012-05-06 00:06:46Z adamlundrigan $

 */

/**

 * Zend_Text_MultiByte contains multibyte safe string methods

 *

 * @category  Zend

 * @package   Zend_Text

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

 * @license   http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Text_MultiByte

{

    /**

     * Word wrap

     *

     * @param  string  $string

     * @param  integer $width

     * @param  string  $break

     * @param  boolean $cut

     * @param  string  $charset

     * @return string

     */

    public static function wordWrap($string, $width = 75, $break = "\n", $cut = false, $charset = 'utf-8')

    {

        $stringWidth = iconv_strlen($string, $charset);

        $breakWidth  = iconv_strlen($break, $charset);

        if (strlen($string) === 0) {

            return '';

        } elseif ($breakWidth === null) {

            throw new Zend_Text_Exception('Break string cannot be empty');

        } elseif ($width === 0 && $cut) {

            throw new Zend_Text_Exception('Can\'t force cut when width is zero');

        }

        $result    = '';

        $lastStart = $lastSpace = 0;

        for ($current = 0; $current < $stringWidth; $current++) {

            $char = iconv_substr($string, $current, 1, $charset);

            if ($breakWidth === 1) {

                $possibleBreak = $char;

            } else {

                $possibleBreak = iconv_substr($string, $current, $breakWidth, $charset);

            }

            if ($possibleBreak === $break) {

                $result    .= iconv_substr($string, $lastStart, $current - $lastStart + $breakWidth, $charset);

                $current   += $breakWidth - 1;

                $lastStart  = $lastSpace = $current + 1;

            } elseif ($char === ' ') {

                if ($current - $lastStart >= $width) {

                    $result    .= iconv_substr($string, $lastStart, $current - $lastStart, $charset) . $break;

                    $lastStart  = $current + 1;

                }

                $lastSpace = $current;

            } elseif ($current - $lastStart >= $width && $cut && $lastStart >= $lastSpace) {

                $result    .= iconv_substr($string, $lastStart, $current - $lastStart, $charset) . $break;

                $lastStart  = $lastSpace = $current;

            } elseif ($current - $lastStart >= $width && $lastStart < $lastSpace) {

                $result    .= iconv_substr($string, $lastStart, $lastSpace - $lastStart, $charset) . $break;

                $lastStart  = $lastSpace = $lastSpace + 1;

            }

        }

        if ($lastStart !== $current) {

            $result .= iconv_substr($string, $lastStart, $current - $lastStart, $charset);

        }

        return $result;

    }

    /**

     * String padding

     *

     * @param  string  $input

     * @param  integer $padLength

     * @param  string  $padString

     * @param  integer $padType

     * @param  string  $charset

     * @return string

     */

    public static function strPad($input, $padLength, $padString = ' ', $padType = STR_PAD_RIGHT, $charset = 'utf-8')

    {

        $return          = '';

        $lengthOfPadding = $padLength - iconv_strlen($input, $charset);

        $padStringLength = iconv_strlen($padString, $charset);

        if ($padStringLength === 0 || $lengthOfPadding <= 0) {

            $return = $input;

        } else {

            $repeatCount = floor($lengthOfPadding / $padStringLength);

            if ($padType === STR_PAD_BOTH) {

                $lastStringLeft  = '';

                $lastStringRight = '';

                $repeatCountLeft = $repeatCountRight = ($repeatCount - $repeatCount % 2) / 2;

                $lastStringLength       = $lengthOfPadding - 2 * $repeatCountLeft * $padStringLength;

                $lastStringLeftLength   = $lastStringRightLength = floor($lastStringLength / 2);

                $lastStringRightLength += $lastStringLength % 2;

                $lastStringLeft  = iconv_substr($padString, 0, $lastStringLeftLength, $charset);

                $lastStringRight = iconv_substr($padString, 0, $lastStringRightLength, $charset);

                $return = str_repeat($padString, $repeatCountLeft) . $lastStringLeft

                        . $input

                        . str_repeat($padString, $repeatCountRight) . $lastStringRight;

            } else {

                $lastString = iconv_substr($padString, 0, $lengthOfPadding % $padStringLength, $charset);

                if ($padType === STR_PAD_LEFT) {

                    $return = str_repeat($padString, $repeatCount) . $lastString . $input;

                } else {

                    $return = $input . str_repeat($padString, $repeatCount) . $lastString;

                }

            }

        }

        return $return;

    }

}