<?php


/**
* Smarty plugin
* http://www.smarty.net/forums/viewtopic.php?t=533
-----------------------------------------------------
* File: modifier.truncate_better.php
* Type: modifier
* Name: truncate_better
* Version: 1.3
* Date: January 13th, 2010
* Modified: November 10th, 2012
* Purpose: Cut a string preserving any tag nesting and matching.
* Install: Drop into the plugin directory.
* Author: Original Javascript Code: Benjamin Lupu <lupufr@aol.com>
* Translation to PHP & Smarty: Edward Dale <scompt@scompt.com>
* Modification to add a string: Sebastian Kuhlmann <sebastiankuhlmann@web.de>
* Modification to add user defined closing text before closing tag if tag matches specified elements and added read more link with variable text:
* Avi J Liebowitz avij.com
* Clean up by Brice Favre <brice.favre@blogspirit.com>
* Add Check for naked URL by Lukas Blatter <lukas.blatter@blattertech.ch>
* Add $addstring and $link if there's no tags in string by Lukas Blatter <lukas.blatter@blattertech.ch>
* Add to ToolBox by Lukas Blatter <lukas.blatter@blattertech.ch>
* Example Usage {$htmlString|html_substr:<lengh>:<string_to_add>:<link>:<link_text>}
* 
* @param string
* @param integer
* @param string
* @param string
* @param string
* @return string
*
-------------------------------------------------------------
*/

function smarty_modifier_truncate_better($string, $length = 80, $addstring = '...', $link = '', $link_text = '') {
    // only execute if text is longer than desired length
    if (strlen($string) > $length) {
        if( !empty( $string ) && $length > 0 ) {
        	
        	if ($link != '') {
				// check for naked url
				$regexp = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>"; 
				if(preg_match_all("/$regexp/siU", $link, $matches)) 
					$link = $matches[2][0];
			} 
        	
            $isText = true;
            $ret = "";
            $i = 0;

            $lastSpacePosition = -1;

            $tagsArray = array();
            $currentTag = "";

            $noTagLength = strlen(strip_tags($string));

            // Parser loop
            $string_length = strlen($string);
            for($j = 0 ; $j < $string_length ; $j++) {

                $currentChar = substr( $string, $j, 1 );
                $ret .= $currentChar;

                // Lesser than event
                if( $currentChar == "<") $isText = false;

                // Character handler
                if( $isText ) {

                    // Memorize last space position
                    if( $currentChar == " " ) {
                        $lastSpacePosition = $j;
                    }
                    else {
                        $lastChar = $currentChar;
                    }

                    $i++;
                } else {
                    $currentTag .= $currentChar;
                }

                // Greater than event
                if( $currentChar == ">" ) {
                    $isText = true;

                    // Opening tag handler
                    if( ( strpos( $currentTag, "<" ) !== false) &&
                            ( strpos( $currentTag, "/>" ) === false) &&
                            ( strpos( $currentTag, "</") === false) ) {

                        // Tag has attribute(s)
                        if( strpos( $currentTag, " " ) !== false ) {
                            $currentTag = substr( $currentTag, 1, strpos( $currentTag, " " ) - 1 );
                        } else {
                            // Tag doesn't have attribute(s)
                            $currentTag = substr( $currentTag, 1, -1 );
                        }

                        array_push( $tagsArray, $currentTag );

                    } else if( strpos( $currentTag, "</" ) !== false ) {
                        array_pop( $tagsArray );
                    }

                    $currentTag = "";
                }

                if( $i >= $length) {
                    break;
                }
            }

            // Cut HTML string at last space position
            if( $length < $noTagLength ) {
                if( $lastSpacePosition != -1 ) {
                    $ret = substr( $string, 0, $lastSpacePosition );
                } else {
                    $ret = substr( $string, $j );
                }
            }

			// when there's no tags         
			if (count( $tagsArray ) == 0) {
				$ret .= $addstring;
				if (strlen($link))
					$ret .= " <a href=\"". $link . "\" title=\"". ($link_text != '' ? $link_text : $link) . "\">" . ($link_text != '' ? $link_text : $link) . "</a>";
			}
			// there are tags
			else {
	            // Close broken XHTML elements   
	            while( count( $tagsArray ) != 0 ) {
	                if ( count( $tagsArray ) > 1 ) {
	                    $aTag = array_pop( $tagsArray );
	                    $ret .= "</" . $aTag . ">\n";
	                }
	                // You may add more tags here to put the link and added text before the closing tag
	                elseif ($aTag = 'p' || 'div') {
	                    $aTag = array_pop( $tagsArray );
	                    $ret .= $addstring;
	                    if (strlen($link))
	                    	$ret .= " <a href=\"". $link . "\" title=\"". ($link_text != '' ? $link_text : $link) . "\">" . ($link_text != '' ? $link_text : $link) . "</a></" . $aTag . ">\n";
	                }
	                else {
	                    $aTag = array_pop( $tagsArray );
	                    $ret .= "</" . $aTag . ">" . $addstring;
	                    if (strlen($link))
	                    	$ret .= " <a href=\"". $link . "\" title=\"". ($link_text != '' ? $link_text : $link) . "\">" . ($link_text != '' ? $link_text : $link) . "</a>\n";
	                }
	            }
			}
        } 
        else {
            $ret = "";
        }

        return $ret;
    }
    else {
        return $string;
    }
} 

{$entry->content|truncate_better:'80'|regex_replace:'/<img [^>]*\/?>/':''}

{$entry->content|regex_replace:'/<img [^>]*\/?>/':''|truncate_better:'80'}

<img ... width="100%" />

{$entry->content|strip_tags:false|truncate:160}