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new faster, smarter, utf-8 aware html_truncate()

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secretr 2010-01-09 13:17:45 +00:00
parent 1d7546f0cf
commit a686b662b6
1 changed files with 107 additions and 4 deletions
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111
e107_handlers/e_parse_class.php
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@ -9,9 +9,9 @@
* Text processing and parsing functions
*
* $Source: /cvs_backup/e107_0.8/e107_handlers/e_parse_class.php,v $
* $Revision: 1.89 $
* $Date: 2010-01-02 21:42:51 $
* $Author: e107steved $
* $Revision: 1.90 $
* $Date: 2010-01-09 13:17:45 $
* $Author: secretr $
*
*/
if (!defined('e107_INIT')) { exit(); }
@ -771,6 +771,109 @@ class e_parse
// Return contents of the drain
return $drain;
}
/**
* CakePHP(tm) : Rapid Development Framework (http://www.cakephp.org)
* Copyright 2005-2008, Cake Software Foundation, Inc. (http://www.cakefoundation.org)
*
* Truncate a HTML string
*
* Cuts a string to the length of $length and adds the value of $ending if the text is longer than length.
*
* @param string $text String to truncate.
* @param integer $length Length of returned string, including ellipsis.
* @param string $ending It will be used as Ending and appended to the trimmed string.
* @param boolean $exact If false, $text will not be cut mid-word
* @return string Trimmed string.
*/
function html_truncate($text, $length = 100, $ending = '...', $exact = true)
{
if($this->uStrLen(preg_replace('/<.*?>/', '', $text)) <= $length)
{
return $text;
}
$totalLength = 0;
$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/si', $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 = $this->uStrLen(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 += $this->uStrLen($entity[0]);
}
else
{
break;
}
}
}
$truncate .= $this->uSubStr($tag[3], 0, $left + $entitiesLength);
break;
}
else
{
$truncate .= $tag[3];
$totalLength += $contentLength;
}
if($totalLength >= $length)
{
break;
}
}
if(!$exact)
{
$spacepos = $this->uStrrPos($truncate, ' ');
if(isset($spacepos))
{
$bits = $this->uSubStr($truncate, $spacepos);
preg_match_all('/<\/([a-z]+)>/i', $bits, $droppedTags, PREG_SET_ORDER);
if(!empty($droppedTags))
{
foreach($droppedTags as $closingTag)
{
if(!in_array($closingTag[1], $openTags))
{
array_unshift($openTags, $closingTag[1]);
}
}
}
$truncate = $this->uSubStr($truncate, 0, $spacepos);
}
}
$truncate .= $ending;
foreach($openTags as $tag)
{
$truncate .= '</' . $tag . '>';
}
return $truncate;
}
/**
* Truncate a HTML string to a maximum length $len ­ append the string $more if it was truncated
@ -780,7 +883,7 @@ class e_parse
* @param string $more [optional] String which will be added if truncation - default ' ... '
* @return string
*/
public function html_truncate ($text, $len = 200, $more = ' ... ')
public function html_truncate_old ($text, $len = 200, $more = ' ... ')
{
$pos = 0;
$curlen = 0;