diff options
Diffstat (limited to 'program/lib/html2text.php')
| -rw-r--r-- | program/lib/html2text.php | 413 |
1 files changed, 225 insertions, 188 deletions
diff --git a/program/lib/html2text.php b/program/lib/html2text.php index b476555ba..ee7b0dc40 100644 --- a/program/lib/html2text.php +++ b/program/lib/html2text.php @@ -1,78 +1,109 @@ <?php /************************************************************************* -* * -* class.html2text.inc * -* * -************************************************************************* -* * -* Converts HTML to formatted plain text * -* * -* Copyright (c) 2005 Jon Abernathy <jon@chuggnutt.com> * -* All rights reserved. * -* * -* This script is free software; you can redistribute it and/or modify * -* it under the terms of the GNU General Public License as published by * -* the Free Software Foundation; either version 2 of the License, or * -* (at your option) any later version. * -* * -* The GNU General Public License can be found at * -* http://www.gnu.org/copyleft/gpl.html. * -* * -* This script is distributed in the hope that it will be useful, * -* but WITHOUT ANY WARRANTY; without even the implied warranty of * -* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * -* GNU General Public License for more details. * -* * -* Author(s): Jon Abernathy <jon@chuggnutt.com> * -* * -* Last modified: 04/06/05 * -* Modified: 2004/05/19 (tbr) * -* * -*************************************************************************/ - -/* 2008/08/29: Added PRE handling by A.L.E.C <alec@alec.pl> */ + * * + * class.html2text.inc * + * * + ************************************************************************* + * * + * Converts HTML to formatted plain text * + * * + * Copyright (c) 2005-2007 Jon Abernathy <jon@chuggnutt.com> * + * All rights reserved. * + * * + * This script is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * The GNU General Public License can be found at * + * http://www.gnu.org/copyleft/gpl.html. * + * * + * This script is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * Author(s): Jon Abernathy <jon@chuggnutt.com> * + * * + * Last modified: 08/08/07 * + * * + *************************************************************************/ + /** -* Takes HTML and converts it to formatted, plain text. -* -* Thanks to Alexander Krug (http://www.krugar.de/) to pointing out and -* correcting an error in the regexp search array. Fixed 7/30/03. -* -* Updated set_html() function's file reading mechanism, 9/25/03. -* -* Thanks to Joss Sanglier (http://www.dancingbear.co.uk/) for adding -* several more HTML entity codes to the $search and $replace arrays. -* Updated 11/7/03. -* -* Thanks to Darius Kasperavicius (http://www.dar.dar.lt/) for -* suggesting the addition of $allowed_tags and its supporting function -* (which I slightly modified). Updated 3/12/04. -* -* Thanks to Justin Dearing for pointing out that a replacement for the -* <TH> tag was missing, and suggesting an appropriate fix. -* Updated 8/25/04. -* -* Thanks to Mathieu Collas (http://www.myefarm.com/) for finding a -* display/formatting bug in the _build_link_list() function: email -* readers would show the left bracket and number ("[1") as part of the -* rendered email address. -* Updated 12/16/04. -* -* Thanks to Wojciech Bajon (http://histeria.pl/) for submitting code -* to handle relative links, which I hadn't considered. I modified his -* code a bit to handle normal HTTP links and MAILTO links. Also for -* suggesting three additional HTML entity codes to search for. -* Updated 03/02/05. -* -* Thanks to Jacob Chandler for pointing out another link condition -* for the _build_link_list() function: "https". -* Updated 04/06/05. -* -* @author Jon Abernathy <jon@chuggnutt.com> -* @version 0.6.1 -* @since PHP 4.0.2 -*/ + * Takes HTML and converts it to formatted, plain text. + * + * Thanks to Alexander Krug (http://www.krugar.de/) to pointing out and + * correcting an error in the regexp search array. Fixed 7/30/03. + * + * Updated set_html() function's file reading mechanism, 9/25/03. + * + * Thanks to Joss Sanglier (http://www.dancingbear.co.uk/) for adding + * several more HTML entity codes to the $search and $replace arrays. + * Updated 11/7/03. + * + * Thanks to Darius Kasperavicius (http://www.dar.dar.lt/) for + * suggesting the addition of $allowed_tags and its supporting function + * (which I slightly modified). Updated 3/12/04. + * + * Thanks to Justin Dearing for pointing out that a replacement for the + * <TH> tag was missing, and suggesting an appropriate fix. + * Updated 8/25/04. + * + * Thanks to Mathieu Collas (http://www.myefarm.com/) for finding a + * display/formatting bug in the _build_link_list() function: email + * readers would show the left bracket and number ("[1") as part of the + * rendered email address. + * Updated 12/16/04. + * + * Thanks to Wojciech Bajon (http://histeria.pl/) for submitting code + * to handle relative links, which I hadn't considered. I modified his + * code a bit to handle normal HTTP links and MAILTO links. Also for + * suggesting three additional HTML entity codes to search for. + * Updated 03/02/05. + * + * Thanks to Jacob Chandler for pointing out another link condition + * for the _build_link_list() function: "https". + * Updated 04/06/05. + * + * Thanks to Marc Bertrand (http://www.dresdensky.com/) for + * suggesting a revision to the word wrapping functionality; if you + * specify a $width of 0 or less, word wrapping will be ignored. + * Updated 11/02/06. + * + * *** Big housecleaning updates below: + * + * Thanks to Colin Brown (http://www.sparkdriver.co.uk/) for + * suggesting the fix to handle </li> and blank lines (whitespace). + * Christian Basedau (http://www.movetheweb.de/) also suggested the + * blank lines fix. + * + * Special thanks to Marcus Bointon (http://www.synchromedia.co.uk/), + * Christian Basedau, Norbert Laposa (http://ln5.co.uk/), + * Bas van de Weijer, and Marijn van Butselaar + * for pointing out my glaring error in the <th> handling. Marcus also + * supplied a host of fixes. + * + * Thanks to Jeffrey Silverman (http://www.newtnotes.com/) for pointing + * out that extra spaces should be compressed--a problem addressed with + * Marcus Bointon's fixes but that I had not yet incorporated. + * + * Thanks to Daniel Schledermann (http://www.typoconsult.dk/) for + * suggesting a valuable fix with <a> tag handling. + * + * Thanks to Wojciech Bajon (again!) for suggesting fixes and additions, + * including the <a> tag handling that Daniel Schledermann pointed + * out but that I had not yet incorporated. I haven't (yet) + * incorporated all of Wojciech's changes, though I may at some + * future time. + * + * *** End of the housecleaning updates. Updated 08/08/07. + * + * @author Jon Abernathy <jon@chuggnutt.com> + * @version 1.0.0 + * @since PHP 4.0.2 + */ class html2text { @@ -95,6 +126,9 @@ class html2text /** * Maximum width of the formatted text, in columns. * + * Set this value to 0 (or less) to ignore word wrapping + * and not constrain text to a fixed-width column. + * * @var integer $width * @access public */ @@ -111,43 +145,46 @@ class html2text var $search = array( "/\r/", // Non-legal carriage return "/[\n\t]+/", // Newlines and tabs + '/[ ]{2,}/', // Runs of spaces, pre-handling '/<script[^>]*>.*?<\/script>/i', // <script>s -- which strip_tags supposedly has problems with + '/<style[^>]*>.*?<\/style>/i', // <style>s -- which strip_tags supposedly has problems with //'/<!-- .* -->/', // Comments -- which strip_tags might have problem a with - '/<a [^>]*href=("|\')([^"\']+)\1[^>]*>(.+?)<\/a>/ie', // <a href=""> - '/<h[123][^>]*>(.+?)<\/h[123]>/ie', // H1 - H3 - '/<h[456][^>]*>(.+?)<\/h[456]>/ie', // H4 - H6 + '/<h[123][^>]*>(.*?)<\/h[123]>/ie', // H1 - H3 + '/<h[456][^>]*>(.*?)<\/h[456]>/ie', // H4 - H6 '/<p[^>]*>/i', // <P> '/<br[^>]*>/i', // <br> - '/<b[^>]*>(.+?)<\/b>/ie', // <b> - '/<i[^>]*>(.+?)<\/i>/i', // <i> + '/<b[^>]*>(.*?)<\/b>/ie', // <b> + '/<strong[^>]*>(.*?)<\/strong>/ie', // <strong> + '/<i[^>]*>(.*?)<\/i>/i', // <i> + '/<em[^>]*>(.*?)<\/em>/i', // <em> '/(<ul[^>]*>|<\/ul>)/i', // <ul> and </ul> '/(<ol[^>]*>|<\/ol>)/i', // <ol> and </ol> + '/<li[^>]*>(.*?)<\/li>/i', // <li> and </li> '/<li[^>]*>/i', // <li> + '/<a [^>]*href=("|\')([^"\']+)\1[^>]*>(.*?)<\/a>/ie', + // <a href=""> '/<hr[^>]*>/i', // <hr> '/(<table[^>]*>|<\/table>)/i', // <table> and </table> '/(<tr[^>]*>|<\/tr>)/i', // <tr> and </tr> - '/<td[^>]*>(.+?)<\/td>/i', // <td> and </td> - '/<th[^>]*>(.+?)<\/th>/ie', // <th> and </th> - '/ /i', - '/"/i', - '/>/i', - '/</i', - '/&(amp|#38);/i', - '/©/i', - '/™/i', - '/“/', - '/”/', - '/–/', - '/&#(8217|39);/', - '/©/', - '/™/', - '/—/', - '/“/', - '/”/', - '/•/', - '/®/i', - '/•/i', - '/&[&;]+;/i' + '/<td[^>]*>(.*?)<\/td>/i', // <td> and </td> + '/<th[^>]*>(.*?)<\/th>/ie', // <th> and </th> + '/&(nbsp|#160);/i', // Non-breaking space + '/&(quot|rdquo|ldquo|#8220|#8221|#147|#148);/i', + // Double quotes + '/&(apos|rsquo|lsquo|#8216|#8217);/i', // Single quotes + '/>/i', // Greater-than + '/</i', // Less-than + '/&(amp|#38);/i', // Ampersand + '/&(copy|#169);/i', // Copyright + '/&(trade|#8482|#153);/i', // Trademark + '/&(reg|#174);/i', // Registered + '/&(mdash|#151|#8212);/i', // mdash + '/&(ndash|minus|#8211|#8722);/i', // ndash + '/&(bull|#149|#8226);/i', // Bullet + '/&(pound|#163);/i', // Pound sign + '/&(euro|#8364);/i', // Euro sign + '/&[^&;]+;/i', // Unknown/unhandled entities + '/[ ]{2,}/' // Runs of spaces, post-handling ); /** @@ -160,53 +197,55 @@ class html2text var $replace = array( '', // Non-legal carriage return ' ', // Newlines and tabs + ' ', // Runs of spaces, pre-handling '', // <script>s -- which strip_tags supposedly has problems with - //'', // Comments -- which strip_tags might have problem a with - '$this->_build_link_list("\\2", "\\3")', // <a href=""> + '', // <style>s -- which strip_tags supposedly has problems with + //'', // Comments -- which strip_tags might have problem a with "strtoupper(\"\n\n\\1\n\n\")", // H1 - H3 - "ucwords(\"\n\n\\1\n\")", // H4 - H6 - "\n\n", // <P> + "ucwords(\"\n\n\\1\n\")", // H4 - H6 + "\n\n", // <P> "\n", // <br> 'strtoupper("\\1")', // <b> + 'strtoupper("\\1")', // <strong> '_\\1_', // <i> + '_\\1_', // <em> "\n\n", // <ul> and </ul> "\n\n", // <ol> and </ol> - "\t*", // <li> - "\n-------------------------\n", // <hr> - "\n\n", // <table> and </table> + "\t* \\1\n", // <li> and </li> + "\n\t* ", // <li> + '$this->_build_link_list("\\2", "\\3")', + // <a href=""> + "\n-------------------------\n", // <hr> + "\n\n", // <table> and </table> "\n", // <tr> and </tr> "\t\t\\1\n", // <td> and </td> "strtoupper(\"\t\t\\1\n\")", // <th> and </th> - ' ', - '"', + ' ', // Non-breaking space + '"', // Double quotes + "'", // Single quotes '>', '<', '&', '(c)', '(tm)', - '"', - '"', - '-', - "'", - '(c)', - '(tm)', - '--', - '"', - '"', - '*', '(R)', + '--', + '-', '*', - '' + '£', + 'EUR', // Euro sign. € ? + '', // Unknown/unhandled entities + ' ' // Runs of spaces, post-handling ); - /** - * List of preg* regular expression patterns to search for in PRE body, - * used in conjunction with $pre_replace. - * - * @var array $pre_search - * @access public - * @see $pre_replace - */ + /** + * List of preg* regular expression patterns to search for in PRE body, + * used in conjunction with $pre_replace. + * + * @var array $pre_search + * @access public + * @see $pre_replace + */ var $pre_search = array( "/\n/", "/\t/", @@ -250,7 +289,7 @@ class html2text /** * Indicates whether content in the $html variable has been converted yet. * - * @var boolean $converted + * @var boolean $_converted * @access private * @see $html, $text */ @@ -259,20 +298,21 @@ class html2text /** * Contains URL addresses from links to be rendered in plain text. * - * @var string $link_list + * @var string $_link_list * @access private * @see _build_link_list() */ - var $_link_list = array(); + var $_link_list = ''; /** - * Boolean flag, true if a table of link URLs should be listed after the text. - * - * @var boolean $_do_links - * @access private - * @see html2text() + * Number of valid links detected in the text, used for plain text + * display (rendered similar to footnotes). + * + * @var integer $_link_count + * @access private + * @see _build_link_list() */ - var $_do_links = true; + var $_link_count = 0; /** * Constructor. @@ -283,17 +323,15 @@ class html2text * * @param string $source HTML content * @param boolean $from_file Indicates $source is a file to pull content from - * @param boolean $do_link_table indicate whether a table of link URLs is desired * @access public * @return void */ - function html2text( $source = '', $from_file = false, $produce_link_table = true ) + function html2text( $source = '', $from_file = false ) { if ( !empty($source) ) { $this->set_html($source, $from_file); } $this->set_base_url(); - $this->_do_links = $produce_link_table; } /** @@ -307,10 +345,11 @@ class html2text function set_html( $source, $from_file = false ) { if ( $from_file && file_exists($source) ) { - $this->html = file_get_contents($source); + $this->html = file_get_contents($source); } - else - $this->html = $source; + else + $this->html = $source; + $this->_converted = false; } @@ -377,7 +416,11 @@ class html2text function set_base_url( $url = '' ) { if ( empty($url) ) { - $this->url = 'http://' . $_SERVER['HTTP_HOST']; + if ( !empty($_SERVER['HTTP_HOST']) ) { + $this->url = 'http://' . $_SERVER['HTTP_HOST']; + } else { + $this->url = ''; + } } else { // Strip any trailing slashes for consistency (relative // URLs may already start with a slash like "/file.html") @@ -402,14 +445,14 @@ class html2text function _convert() { // Variables used for building the link list - //$link_count = 1; - //$this->_link_list = ''; + $this->_link_count = 0; + $this->_link_list = ''; $text = trim(stripslashes($this->html)); // Convert <PRE> - $this->_convert_pre($text); - + $this->_convert_pre($text); + // Run our defined search-and-replace $text = preg_replace($this->search, $this->replace, $text); @@ -417,20 +460,20 @@ class html2text $text = strip_tags($text, $this->allowed_tags); // Bring down number of empty lines to 2 max - $text = preg_replace("/\n\s+\n/", "\n", $text); + $text = preg_replace("/\n\s+\n/", "\n\n", $text); $text = preg_replace("/[\n]{3,}/", "\n\n", $text); // Add link list - if ( sizeof($this->_link_list) ) { - $text .= "\n\nLinks:\n------\n"; - foreach ($this->_link_list as $id => $link) { - $text .= '[' . ($id+1) . '] ' . $link . "\n"; - } + if ( !empty($this->_link_list) ) { + $text .= "\n\nLinks:\n------\n" . $this->_link_list; } // Wrap the text to a readable format // for PHP versions >= 4.0.2. Default width is 75 - $text = wordwrap($text, $this->width); + // If width is 0 or less, don't wrap the text. + if ( $this->width > 0 ) { + $text = wordwrap($text, $this->width); + } $this->text = $text; @@ -445,55 +488,49 @@ class html2text * appeared. Also makes an effort at identifying and handling absolute * and relative links. * - * @param integer $link_count Counter tracking current link number * @param string $link URL of the link * @param string $display Part of the text to associate number with * @access private * @return string - */ - function _build_link_list($link, $display) - { - if (! $this->_do_links) return $display; - - $link_lc = strtolower($link); - - if (substr($link_lc, 0, 7) == 'http://' || substr($link_lc, 0, 8) == 'https://' || substr($link_lc, 0, 7) == 'mailto:') - { - $url = $link; - } - else - { - $url = $this->url; - if ($link{0} != '/') { - $url .= '/'; + */ + function _build_link_list( $link, $display ) + { + if ( substr($link, 0, 7) == 'http://' || substr($link, 0, 8) == 'https://' || + substr($link, 0, 7) == 'mailto:' ) { + $this->_link_count++; + $this->_link_list .= "[" . $this->_link_count . "] $link\n"; + $additional = ' [' . $this->_link_count . ']'; + } elseif ( substr($link, 0, 11) == 'javascript:' ) { + // Don't count the link; ignore it + $additional = ''; + // what about href="#anchor" ? + } else { + $this->_link_count++; + $this->_link_list .= "[" . $this->_link_count . "] " . $this->url; + if ( substr($link, 0, 1) != '/' ) { + $this->_link_list .= '/'; } - $url .= $link; + $this->_link_list .= "$link\n"; + $additional = ' [' . $this->_link_count . ']'; } - $index = array_search($url, $this->_link_list); - if ($index===FALSE) - { - $index = sizeof($this->_link_list); - $this->_link_list[$index] = $url; - } - - return $display . ' [' . ($index+1) . ']'; - } - + return $display . $additional; + } + /** * Helper function for PRE body conversion. * * @param string HTML content * @access private - */ + */ function _convert_pre(&$text) - { - while(preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches)) - { - $result = preg_replace($this->pre_search, $this->pre_replace, $matches[1]); - $text = preg_replace('/<pre[^>]*>.*<\/pre>/ismU', '<div><br>' . $result . '<br></div>', $text); - } - } + { + while(preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches)) + { + $result = preg_replace($this->pre_search, $this->pre_replace, $matches[1]); + $text = preg_replace('/<pre[^>]*>.*<\/pre>/ismU', '<div><br>' . $result . '<br></div>', $text); + } + } } ?> |