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 <?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) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license   http://framework.zend.com/license/new-bsd     New BSD License
  * @version   $Id$
  */
 
 /**
  * Zend_Text_MultiByte contains multibyte safe string methods
  *
  * @category  Zend
  * @package   Zend_Text
  * @copyright  Copyright (c) 2005-2015 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;
     }
 }