<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

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

 * @version   $Id: MultiByte.php 21931 2010-04-18 15:25:32Z dasprid $

 */

/**

 * Zend_Text_MultiByte contains multibyte safe string methods

 *

 * @category  Zend

 * @package   Zend_Text

 * @copyright  Copyright (c) 2005-2010 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')

    {

        $result     = array();

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

        while (($stringLength = iconv_strlen($string, $charset)) > 0) {

            $breakPos = iconv_strpos($string, $break, 0, $charset);

            if ($breakPos !== false && $breakPos < $width) {

                if ($breakPos === $stringLength - $breakWidth) {

                    $subString = $string;

                    $cutLength = null;

                } else {

                    $subString = iconv_substr($string, 0, $breakPos, $charset);

                    $cutLength = $breakPos + $breakWidth;

                }

            } else {

                $subString = iconv_substr($string, 0, $width, $charset);

                if ($subString === $string) {

                    $cutLength = null;

                } else {

                    $nextChar = iconv_substr($string, $width, 1, $charset);

                    if ($breakWidth === 1) {

                        $nextBreak = $nextChar;

                    } else {

                        $nextBreak = iconv_substr($string, $breakWidth, 1, $charset);

                    }

                    if ($nextChar === ' ' || $nextBreak === $break) {

                        $afterNextChar = iconv_substr($string, $width + 1, 1, $charset);

                        if ($afterNextChar === false) {

                            $subString .= $nextChar;

                        }

                        $cutLength = iconv_strlen($subString, $charset) + 1;

                    } else {

                        $spacePos = iconv_strrpos($subString, ' ', $charset);

                        if ($spacePos !== false) {

                            $subString = iconv_substr($subString, 0, $spacePos, $charset);

                            $cutLength = $spacePos + 1;

                        } else if ($cut === false) {

                            $spacePos = iconv_strpos($string, ' ', 0, $charset);

                            if ($spacePos !== false) {

                                $subString = iconv_substr($string, 0, $spacePos, $charset);

                                $cutLength = $spacePos + 1;

                            } else {

                                $subString = $string;

                                $cutLength = null;

                            }

                        } else {

                            $subString = iconv_substr($subString, 0, $width, $charset);

                            $cutLength = $width;

                        }

                    }

                }

            }

            $result[] = $subString;

            if ($cutLength !== null) {

                $string = iconv_substr($string, $cutLength, ($stringLength - $cutLength), $charset);

            } else {

                break;

            }

        }

        return implode($break, $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;

    }

}