WebSVN – lars-tiefland.cakephp – /cake/libs/view/helpers/text.php

<?php
/* SVN FILE: $Id: text.php 7945 2008-12-19 02:16:01Z gwoo $ */
/**
 * Text Helper
 *
 * Text manipulations: Highlight, excerpt, truncate, strip of links, convert email addresses to mailto: links...
 *
 * PHP versions 4 and 5
 *
 * CakePHP(tm) :  Rapid Development Framework (http://www.cakephp.org)
 * Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 *
 * Licensed under The MIT License
 * Redistributions of files must retain the above copyright notice.
 *
 * @filesource
 * @copyright     Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
 * @link          http://www.cakefoundation.org/projects/info/cakephp CakePHP(tm) Project
 * @package       cake
 * @subpackage    cake.cake.libs.view.helpers
 * @since         CakePHP(tm) v 0.10.0.1076
 * @version       $Revision: 7945 $
 * @modifiedby    $LastChangedBy: gwoo $
 * @lastmodified  $Date: 2008-12-18 18:16:01 -0800 (Thu, 18 Dec 2008) $
 * @license       http://www.opensource.org/licenses/mit-license.php The MIT License
 */
/**
 * Included libraries.
 *
 */
if (!class_exists('HtmlHelper')) {
        App::import('Helper', 'Html');
}
if (!class_exists('Multibyte')) {
        App::import('Core', 'Multibyte');
}
/**
 * Text helper library.
 *
 * Text manipulations: Highlight, excerpt, truncate, strip of links, convert email addresses to mailto: links...
 *
 * @package       cake
 * @subpackage    cake.cake.libs.view.helpers
 */
class TextHelper extends AppHelper {
/**
 * Highlights a given phrase in a text. You can specify any expression in highlighter that
 * may include the \1 expression to include the $phrase found.
 *
 * @param string $text Text to search the phrase in
 * @param string $phrase The phrase that will be searched
 * @param string $highlighter The piece of html with that the phrase will be highlighted
 * @param boolean $considerHtml If true, will ignore any HTML tags, ensuring that only the correct text is highlighted
 * @return string The highlighted text
 * @access public
 */
        function highlight($text, $phrase, $highlighter = '<span class="highlight">\1</span>', $considerHtml = false) {
                if (empty($phrase)) {
                        return $text;
                }

                if (is_array($phrase)) {
                        $replace = array();
                        $with = array();

                        foreach ($phrase as $key => $value) {
                                $key = $value;
                                $value = $highlighter;
                                $key = '(' . $key . ')';
                                if ($considerHtml) {
                                        $key = '(?![^<]+>)' . $key . '(?![^<]+>)';
                                }
                                $replace[] = '|' . $key . '|iu';
                                $with[] = empty($value) ? $highlighter : $value;
                        }

                        return preg_replace($replace, $with, $text);
                } else {
                        $phrase = '(' . $phrase . ')';
                        if ($considerHtml) {
                                $phrase = '(?![^<]+>)' . $phrase . '(?![^<]+>)';
                        }

                        return preg_replace('|'.$phrase.'|iu', $highlighter, $text);
                }
        }
/**
 * Strips given text of all links (<a href=....)
 *
 * @param string $text Text
 * @return string The text without links
 * @access public
 */
        function stripLinks($text) {
                return preg_replace('|<a\s+[^>]+>|im', '', preg_replace('|<\/a>|im', '', $text));
        }
/**
 * Adds links (<a href=....) to a given text, by finding text that begins with
 * strings like http:// and ftp://.
 *
 * @param string $text Text to add links to
 * @param array $htmlOptions Array of HTML options.
 * @return string The text with links
 * @access public
 */
        function autoLinkUrls($text, $htmlOptions = array()) {
                $options = 'array(';
                foreach ($htmlOptions as $option => $value) {
                                $value = var_export($value, true);
                                $options .= "'$option' => $value, ";
                }
                $options .= ')';

                $text = preg_replace_callback('#(?<!href="|">)((?:http|https|ftp|nntp)://[^ <]+)#i', create_function('$matches',
                        '$Html = new HtmlHelper(); $Html->tags = $Html->loadConfig(); return $Html->link($matches[0], $matches[0],' . $options . ');'), $text);

                return preg_replace_callback('#(?<!href="|">)(?<!http://|https://|ftp://|nntp://)(www\.[^\n\%\ <]+[^<\n\%\,\.\ <])(?<!\))#i',
                        create_function('$matches', '$Html = new HtmlHelper(); $Html->tags = $Html->loadConfig(); return $Html->link($matches[0], "http://" . strtolower($matches[0]),' . $options . ');'), $text);
        }
/**
 * Adds email links (<a href="mailto:....) to a given text.
 *
 * @param string $text Text
 * @param array $htmlOptions Array of HTML options.
 * @return string The text with links
 * @access public
 */
        function autoLinkEmails($text, $htmlOptions = array()) {
                $options = 'array(';

                foreach ($htmlOptions as $option => $value) {
                        $options .= "'$option' => '$value', ";
                }
                $options .= ')';

                return preg_replace_callback('#([_A-Za-z0-9+-]+(?:\.[_A-Za-z0-9+-]+)*@[A-Za-z0-9-]+(?:\.[A-Za-z0-9-]+)*)#',
                                                create_function('$matches', '$Html = new HtmlHelper(); $Html->tags = $Html->loadConfig(); return $Html->link($matches[0], "mailto:" . $matches[0],' . $options . ');'), $text);
        }
/**
 * Convert all links and email adresses to HTML links.
 *
 * @param string $text Text
 * @param array $htmlOptions Array of HTML options.
 * @return string The text with links
 * @access public
 */
        function autoLink($text, $htmlOptions = array()) {
                return $this->autoLinkEmails($this->autoLinkUrls($text, $htmlOptions), $htmlOptions);
        }
/**
 * Truncates text.
 *
 * Cuts a string to the length of $length and replaces the last characters
 * with the ending if the text is longer than length.
 *
 * @param string  $text String to truncate.
 * @param integer $length Length of returned string, including ellipsis.
 * @param mixed $ending If string, will be used as Ending and appended to the trimmed string. Can also be an associative array that can contain the last three params of this method.
 * @param boolean $exact If false, $text will not be cut mid-word
 * @param boolean $considerHtml If true, HTML tags would be handled correctly
 * @return string Trimmed string.
 */
        function truncate($text, $length = 100, $ending = '...', $exact = true, $considerHtml = false) {
                if (is_array($ending)) {
                        extract($ending);
                }
                if ($considerHtml) {
                        if (mb_strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
                                return $text;
                        }
                        $totalLength = mb_strlen($ending);
                        $openTags = array();
                        $truncate = '';
                        preg_match_all('/(<\/?([\w+]+)[^>]*>)?([^<>]*)/', $text, $tags, PREG_SET_ORDER);
                        foreach ($tags as $tag) {
                                if (!preg_match('/img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param/s', $tag[2])) {
                                        if (preg_match('/<[\w]+[^>]*>/s', $tag[0])) {
                                                array_unshift($openTags, $tag[2]);
                                        } else if (preg_match('/<\/([\w]+)[^>]*>/s', $tag[0], $closeTag)) {
                                                $pos = array_search($closeTag[1], $openTags);
                                                if ($pos !== false) {
                                                        array_splice($openTags, $pos, 1);
                                                }
                                        }
                                }
                                $truncate .= $tag[1];

                                $contentLength = mb_strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', ' ', $tag[3]));
                                if ($contentLength + $totalLength > $length) {
                                        $left = $length - $totalLength;
                                        $entitiesLength = 0;
                                        if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', $tag[3], $entities, PREG_OFFSET_CAPTURE)) {
                                                foreach ($entities[0] as $entity) {
                                                        if ($entity[1] + 1 - $entitiesLength <= $left) {
                                                                $left--;
                                                                $entitiesLength += mb_strlen($entity[0]);
                                                        } else {
                                                                break;
                                                        }
                                                }
                                        }

                                        $truncate .= mb_substr($tag[3], 0 , $left + $entitiesLength);
                                        break;
                                } else {
                                        $truncate .= $tag[3];
                                        $totalLength += $contentLength;
                                }
                                if ($totalLength >= $length) {
                                        break;
                                }
                        }

                } else {
                        if (mb_strlen($text) <= $length) {
                                return $text;
                        } else {
                                $truncate = mb_substr($text, 0, $length - strlen($ending));
                        }
                }
                if (!$exact) {
                        $spacepos = mb_strrpos($truncate, ' ');
                        if (isset($spacepos)) {
                                if ($considerHtml) {
                                        $bits = mb_substr($truncate, $spacepos);
                                        preg_match_all('/<\/([a-z]+)>/', $bits, $droppedTags, PREG_SET_ORDER);
                                        if (!empty($droppedTags)) {
                                                foreach ($droppedTags as $closingTag) {
                                                        if (!in_array($closingTag[1], $openTags)) {
                                                                array_unshift($openTags, $closingTag[1]);
                                                        }
                                                }
                                        }
                                }
                                $truncate = mb_substr($truncate, 0, $spacepos);
                        }
                }

                $truncate .= $ending;

                if ($considerHtml) {
                        foreach ($openTags as $tag) {
                                $truncate .= '</'.$tag.'>';
                        }
                }

                return $truncate;
        }
/**
 * Alias for truncate().
 *
 * @see TextHelper::truncate()
 * @access public
 */
        function trim() {
                $args = func_get_args();
                return call_user_func_array(array(&$this, 'truncate'), $args);
        }
/**
 * Extracts an excerpt from the text surrounding the phrase with a number of characters on each side determined by radius.
 *
 * @param string $text String to search the phrase in
 * @param string $phrase Phrase that will be searched for
 * @param integer $radius The amount of characters that will be returned on each side of the founded phrase
 * @param string $ending Ending that will be appended
 * @return string Modified string
 * @access public
 */
        function excerpt($text, $phrase, $radius = 100, $ending = "...") {
                if (empty($text) or empty($phrase)) {
                        return $this->truncate($text, $radius * 2, $ending);
                }

                $phraseLen = strlen($phrase);
                if ($radius < $phraseLen) {
                        $radius = $phraseLen;
                }

                $pos = strpos(strtolower($text), strtolower($phrase));
                $startPos = 0;
                if ($pos > $radius) {
                        $startPos = $pos - $radius;
                }
                $textLen = strlen($text);
                $endPos = $pos + $phraseLen + $radius;
                if ($endPos >= $textLen) {
                        $endPos = $textLen;
                }
                $excerpt = substr($text, $startPos, $endPos - $startPos);

                if ($startPos != 0) {
                        $excerpt = substr_replace($excerpt, $ending, 0, $phraseLen);
                }

                if ($endPos != $textLen) {
                        $excerpt = substr_replace($excerpt, $ending, -$phraseLen);
                }

                return $excerpt;
        }
/**
 * Creates a comma separated list where the last two items are joined with 'and', forming natural English
 *
 * @param array $list The list to be joined
 * @return string
 * @access public
 */
        function toList($list, $and = 'and') {
                $r = '';
                $c = count($list) - 1;
                foreach ($list as $i => $item) {
                        $r .= $item;
                        if ($c > 0 && $i < $c)
                        {
                                $r .= ($i < $c - 1 ? ', ' : " {$and} ");
                        }
                }
                return $r;
        }
/**
 * Text-to-html parser, similar to Textile or RedCloth, only with a little different syntax.
 *
 * @param string $text String to "flay"
 * @param boolean $allowHtml Set to true if if html is allowed
 * @return string "Flayed" text
 * @access public
 * @todo Change this. We need a real Textile parser.
 * @codeCoverageIgnoreStart
 */
        function flay($text, $allowHtml = false) {
                trigger_error(__('(TextHelper::flay) Deprecated: the Flay library is no longer supported and will be removed in a future version.', true), E_USER_WARNING);
                if (!class_exists('Flay')) {
                        uses('flay');
                }
                return Flay::toHtml($text, false, $allowHtml);
        }
/**
 * @codeCoverageIgnoreEnd
 */
}
?>
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