/lib/Cake/View/Helper/TextHelper.php
PHP | 376 lines | 203 code | 34 blank | 139 comment | 36 complexity | 94fe2724bd25ecbae265a3e3cfba5b91 MD5 | raw file
- <?php
- /**
- * Text Helper
- *
- * Text manipulations: Highlight, excerpt, truncate, strip of links, convert email addresses to mailto: links...
- *
- * PHP 5
- *
- * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
- * Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
- *
- * Licensed under The MIT License
- * Redistributions of files must retain the above copyright notice.
- *
- * @copyright Copyright 2005-2011, Cake Software Foundation, Inc. (http://cakefoundation.org)
- * @link http://cakephp.org CakePHP(tm) Project
- * @package Cake.View.Helper
- * @since CakePHP(tm) v 0.10.0.1076
- * @license MIT License (http://www.opensource.org/licenses/mit-license.php)
- */
- App::uses('AppHelper', 'View/Helper');
- App::uses('HtmlHelper', 'Helper');
- App::uses('Multibyte', 'I18n');
- /**
- * Text helper library.
- *
- * Text manipulations: Highlight, excerpt, truncate, strip of links, convert email addresses to mailto: links...
- *
- * @package Cake.View.Helper
- * @property HtmlHelper $Html
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html
- */
- class TextHelper extends AppHelper {
- /**
- * helpers
- *
- * @var array
- */
- public $helpers = array('Html');
- /**
- * 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.
- *
- * ### Options:
- *
- * - `format` The piece of html with that the phrase will be highlighted
- * - `html` If true, will ignore any HTML tags, ensuring that only the correct text is highlighted
- *
- * @param string $text Text to search the phrase in
- * @param string $phrase The phrase that will be searched
- * @param array $options An array of html attributes and options.
- * @return string The highlighted text
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::highlight
- */
- public function highlight($text, $phrase, $options = array()) {
- if (empty($phrase)) {
- return $text;
- }
- $default = array(
- 'format' => '<span class="highlight">\1</span>',
- 'html' => false
- );
- $options = array_merge($default, $options);
- extract($options);
- if (is_array($phrase)) {
- $replace = array();
- $with = array();
- foreach ($phrase as $key => $segment) {
- $segment = '(' . preg_quote($segment, '|') . ')';
- if ($html) {
- $segment = "(?![^<]+>)$segment(?![^<]+>)";
- }
- $with[] = (is_array($format)) ? $format[$key] : $format;
- $replace[] = "|$segment|iu";
- }
- return preg_replace($replace, $with, $text);
- } else {
- $phrase = '(' . preg_quote($phrase, '|') . ')';
- if ($html) {
- $phrase = "(?![^<]+>)$phrase(?![^<]+>)";
- }
- return preg_replace("|$phrase|iu", $format, $text);
- }
- }
- /**
- * Strips given text of all links (<a href=....)
- *
- * @param string $text Text
- * @return string The text without links
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::stripLinks
- */
- public function stripLinks($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 $htmlOptions Array of HTML options.
- * @return string The text with links
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::autoLinkUrls
- */
- public function autoLinkUrls($text, $htmlOptions = array()) {
- $this->_linkOptions = $htmlOptions;
- $text = preg_replace_callback(
- '#(?<!href="|src="|">)((?:https?|ftp|nntp)://[^\s<>()]+)#i',
- array(&$this, '_linkBareUrl'),
- $text
- );
- return preg_replace_callback(
- '#(?<!href="|">)(?<!http://|https://|ftp://|nntp://)(www\.[^\n\%\ <]+[^<\n\%\,\.\ <])(?<!\))#i',
- array(&$this, '_linkUrls'),
- $text
- );
- }
- /**
- * Links urls that include http://
- *
- * @param array $matches
- * @return string
- * @see TextHelper::autoLinkUrls()
- */
- protected function _linkBareUrl($matches) {
- return $this->Html->link($matches[0], $matches[0], $this->_linkOptions);
- }
- /**
- * Links urls missing http://
- *
- * @param array $matches
- * @return string
- * @see TextHelper::autoLinkUrls()
- */
- protected function _linkUrls($matches) {
- return $this->Html->link($matches[0], 'http://' . $matches[0], $this->_linkOptions);
- }
- /**
- * Links email addresses
- *
- * @param array $matches
- * @return string
- * @see TextHelper::autoLinkUrls()
- */
- protected function _linkEmails($matches) {
- return $this->Html->link($matches[0], 'mailto:' . $matches[0], $this->_linkOptions);
- }
- /**
- * Adds email links (<a href="mailto:....) to a given text.
- *
- * @param string $text Text
- * @param array $options Array of HTML options.
- * @return string The text with links
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::autoLinkEmails
- */
- public function autoLinkEmails($text, $options = array()) {
- $this->_linkOptions = $options;
- $atom = '[a-z0-9!#$%&\'*+\/=?^_`{|}~-]';
- return preg_replace_callback(
- '/(' . $atom . '+(?:\.' . $atom . '+)*@[a-z0-9-]+(?:\.[a-z0-9-]+)+)/i',
- array(&$this, '_linkEmails'),
- $text
- );
- }
- /**
- * Convert all links and email addresses to HTML links.
- *
- * @param string $text Text
- * @param array $options Array of HTML options.
- * @return string The text with links
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::autoLink
- */
- public function autoLink($text, $options = array()) {
- return $this->autoLinkEmails($this->autoLinkUrls($text, $options), $options);
- }
- /**
- * 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.
- *
- * ### Options:
- *
- * - `ending` Will be used as Ending and appended to the trimmed string
- * - `exact` If false, $text will not be cut mid-word
- * - `html` If true, HTML tags would be handled correctly
- *
- * @param string $text String to truncate.
- * @param integer $length Length of returned string, including ellipsis.
- * @param array $options An array of html attributes and options.
- * @return string Trimmed string.
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::truncate
- */
- public function truncate($text, $length = 100, $options = array()) {
- $default = array(
- 'ending' => '...', 'exact' => true, 'html' => false
- );
- $options = array_merge($default, $options);
- extract($options);
- if (!function_exists('mb_strlen')) {
- class_exists('Multibyte');
- }
- if ($html) {
- if (mb_strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
- return $text;
- }
- $totalLength = mb_strlen(strip_tags($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, $length - mb_strlen($ending));
- }
- }
- if (!$exact) {
- $spacepos = mb_strrpos($truncate, ' ');
- if ($html) {
- $truncateCheck = mb_substr($truncate, 0, $spacepos);
- $lastOpenTag = mb_strrpos($truncateCheck, '<');
- $lastCloseTag = mb_strrpos($truncateCheck, '>');
- if ($lastOpenTag > $lastCloseTag) {
- preg_match_all('/<[\w]+[^>]*>/s', $truncate, $lastTagMatches);
- $lastTag = array_pop($lastTagMatches[0]);
- $spacepos = mb_strrpos($truncate, $lastTag) + mb_strlen($lastTag);
- }
- $bits = mb_substr($truncate, $spacepos);
- preg_match_all('/<\/([a-z]+)>/', $bits, $droppedTags, PREG_SET_ORDER);
- if (!empty($droppedTags)) {
- if (!empty($openTags)) {
- foreach ($droppedTags as $closingTag) {
- if (!in_array($closingTag[1], $openTags)) {
- array_unshift($openTags, $closingTag[1]);
- }
- }
- } else {
- foreach ($droppedTags as $closingTag) {
- array_push($openTags, $closingTag[1]);
- }
- }
- }
- }
- $truncate = mb_substr($truncate, 0, $spacepos);
- }
- $truncate .= $ending;
- if ($html) {
- foreach ($openTags as $tag) {
- $truncate .= '</' . $tag . '>';
- }
- }
- return $truncate;
- }
- /**
- * 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 $ending Ending that will be appended
- * @return string Modified string
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::excerpt
- */
- public function excerpt($text, $phrase, $radius = 100, $ending = '...') {
- if (empty($text) or empty($phrase)) {
- return $this->truncate($text, $radius * 2, array('ending' => $ending));
- }
- $append = $prepend = $ending;
- $phraseLen = mb_strlen($phrase);
- $textLen = mb_strlen($text);
- $pos = mb_strpos(mb_strtolower($text), mb_strtolower($phrase));
- if ($pos === false) {
- return mb_substr($text, 0, $radius) . $ending;
- }
- $startPos = $pos - $radius;
- if ($startPos <= 0) {
- $startPos = 0;
- $prepend = '';
- }
- $endPos = $pos + $phraseLen + $radius;
- if ($endPos >= $textLen) {
- $endPos = $textLen;
- $append = '';
- }
- $excerpt = mb_substr($text, $startPos, $endPos - $startPos);
- $excerpt = $prepend . $excerpt . $append;
-
- 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
- * @param string $and The word used to join the last and second last items together with. Defaults to 'and'
- * @param string $separator The separator used to join all the other items together. Defaults to ', '
- * @return string The glued together string.
- * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/text.html#TextHelper::toList
- */
- public function toList($list, $and = 'and', $separator = ', ') {
- if (count($list) > 1) {
- return implode($separator, array_slice($list, null, -1)) . ' ' . $and . ' ' . array_pop($list);
- } else {
- return array_pop($list);
- }
- }
- }