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(HTML) Formatted Case Logs, Description and Notifications with inline images uploaded as Attachments. Beta Version !!
SVN:trunk[3916]
This commit is contained in:
Denis Flaven
321
application/Html2Text.php
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321
application/Html2Text.php
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<?php
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namespace Html2Text;
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/**
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* Replace all occurrences of the search string with the replacement string.
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*
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* @author Sean Murphy <sean@iamseanmurphy.com>
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* @copyright Copyright 2012 Sean Murphy. All rights reserved.
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* @license http://creativecommons.org/publicdomain/zero/1.0/
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* @link http://php.net/manual/function.str-replace.php
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*
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* @param mixed $search
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* @param mixed $replace
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* @param mixed $subject
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* @param int $count
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* @return mixed
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*/
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function mb_str_replace($search, $replace, $subject, &$count = 0) {
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if (!is_array($subject)) {
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// Normalize $search and $replace so they are both arrays of the same length
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$searches = is_array($search) ? array_values($search) : array($search);
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$replacements = is_array($replace) ? array_values($replace) : array($replace);
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$replacements = array_pad($replacements, count($searches), '');
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foreach ($searches as $key => $search) {
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$parts = mb_split(preg_quote($search), $subject);
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$count += count($parts) - 1;
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$subject = implode($replacements[$key], $parts);
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}
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} else {
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// Call mb_str_replace for each subject in array, recursively
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foreach ($subject as $key => $value) {
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$subject[$key] = mb_str_replace($search, $replace, $value, $count);
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}
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}
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return $subject;
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}
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/******************************************************************************
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* Copyright (c) 2010 Jevon Wright and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* or
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*
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* LGPL which is available at http://www.gnu.org/licenses/lgpl.html
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*
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*
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* Contributors:
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* Jevon Wright - initial API and implementation
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* Denis Flaven - some fixes for properly handling UTF-8 characters
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****************************************************************************/
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class Html2Text {
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/**
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* Tries to convert the given HTML into a plain text format - best suited for
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* e-mail display, etc.
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*
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* <p>In particular, it tries to maintain the following features:
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* <ul>
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* <li>Links are maintained, with the 'href' copied over
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* <li>Information in the <head> is lost
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* </ul>
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*
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* @param string html the input HTML
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* @return string the HTML converted, as best as possible, to text
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* @throws Html2TextException if the HTML could not be loaded as a {@link DOMDocument}
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*/
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static function convert($html) {
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// replace with spaces
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$html = str_replace(" ", " ", $html);
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$html = mb_str_replace("\xa0", " ", $html); // DO NOT USE str_replace since it breaks the "à" character which is \xc3 \xa0 in UTF-8
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$html = static::fixNewlines($html);
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$doc = new \DOMDocument();
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if (!@$doc->loadHTML('<?xml encoding="UTF-8">'.$html)) // Forces the UTF-8 character set for HTML fragments
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{
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throw new Html2TextException("Could not load HTML - badly formed?", $html);
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}
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$output = static::iterateOverNode($doc);
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// remove leading and trailing spaces on each line
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$output = preg_replace("/[ \t]*\n[ \t]*/im", "\n", $output);
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$output = preg_replace("/ *\t */im", "\t", $output);
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// remove unnecessary empty lines
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$output = preg_replace("/\n\n\n*/im", "\n\n", $output);
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// remove leading and trailing whitespace
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$output = trim($output);
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return $output;
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}
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/**
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* Unify newlines; in particular, \r\n becomes \n, and
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* then \r becomes \n. This means that all newlines (Unix, Windows, Mac)
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* all become \ns.
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*
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* @param string text text with any number of \r, \r\n and \n combinations
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* @return string the fixed text
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*/
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static function fixNewlines($text) {
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// replace \r\n to \n
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$text = str_replace("\r\n", "\n", $text);
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// remove \rs
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$text = str_replace("\r", "\n", $text);
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return $text;
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}
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static function nextChildName($node) {
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// get the next child
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$nextNode = $node->nextSibling;
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while ($nextNode != null) {
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if ($nextNode instanceof \DOMElement) {
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break;
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}
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$nextNode = $nextNode->nextSibling;
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}
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$nextName = null;
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if ($nextNode instanceof \DOMElement && $nextNode != null) {
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$nextName = strtolower($nextNode->nodeName);
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}
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return $nextName;
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}
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static function prevChildName($node) {
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// get the previous child
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$nextNode = $node->previousSibling;
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while ($nextNode != null) {
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if ($nextNode instanceof \DOMElement) {
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break;
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}
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$nextNode = $nextNode->previousSibling;
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}
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$nextName = null;
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if ($nextNode instanceof \DOMElement && $nextNode != null) {
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$nextName = strtolower($nextNode->nodeName);
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}
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return $nextName;
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}
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static function iterateOverNode($node) {
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if ($node instanceof \DOMText) {
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// Replace whitespace characters with a space (equivilant to \s)
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return preg_replace("/[\\t\\n\\f\\r ]+/im", " ", $node->wholeText);
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}
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if ($node instanceof \DOMDocumentType) {
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// ignore
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return "";
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}
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$nextName = static::nextChildName($node);
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$prevName = static::prevChildName($node);
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$name = strtolower($node->nodeName);
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// start whitespace
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switch ($name) {
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case "hr":
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return "---------------------------------------------------------------\n";
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case "style":
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case "head":
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case "title":
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case "meta":
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case "script":
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// ignore these tags
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return "";
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case "h1":
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case "h2":
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case "h3":
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case "h4":
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case "h5":
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case "h6":
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case "ol":
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case "ul":
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// add two newlines, second line is added below
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$output = "\n";
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break;
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case "td":
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case "th":
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// add tab char to separate table fields
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$output = "\t";
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break;
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case "tr":
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case "p":
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case "div":
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// add one line
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$output = "\n";
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break;
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case "li":
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$output = "- ";
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break;
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default:
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// print out contents of unknown tags
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$output = "";
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break;
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}
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// debug
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//$output .= "[$name,$nextName]";
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if (isset($node->childNodes)) {
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for ($i = 0; $i < $node->childNodes->length; $i++) {
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$n = $node->childNodes->item($i);
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$text = static::iterateOverNode($n);
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$output .= $text;
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}
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}
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// end whitespace
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switch ($name) {
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case "h1":
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case "h2":
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case "h3":
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case "h4":
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case "h5":
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case "h6":
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$output .= "\n";
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break;
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case "p":
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case "br":
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// add one line
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if ($nextName != "div")
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$output .= "\n";
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break;
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case "div":
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// add one line only if the next child isn't a div
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if ($nextName != "div" && $nextName != null)
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$output .= "\n";
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break;
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case "a":
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// links are returned in [text](link) format
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$href = $node->getAttribute("href");
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$output = trim($output);
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// remove double [[ ]] s from linking images
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if (substr($output, 0, 1) == "[" && substr($output, -1) == "]") {
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$output = substr($output, 1, strlen($output) - 2);
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// for linking images, the title of the <a> overrides the title of the <img>
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if ($node->getAttribute("title")) {
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$output = $node->getAttribute("title");
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}
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}
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// if there is no link text, but a title attr
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if (!$output && $node->getAttribute("title")) {
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$output = $node->getAttribute("title");
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}
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if ($href == null) {
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// it doesn't link anywhere
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if ($node->getAttribute("name") != null) {
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$output = "[$output]";
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}
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} else {
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if ($href == $output || $href == "mailto:$output" || $href == "http://$output" || $href == "https://$output") {
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// link to the same address: just use link
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$output;
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} else {
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// replace it
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if ($output) {
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$output = "[$output]($href)";
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} else {
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// empty string
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$output = $href;
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}
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}
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}
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// does the next node require additional whitespace?
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switch ($nextName) {
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case "h1": case "h2": case "h3": case "h4": case "h5": case "h6":
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$output .= "\n";
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break;
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}
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break;
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case "img":
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if ($node->getAttribute("title")) {
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$output = "[" . $node->getAttribute("title") . "]";
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} elseif ($node->getAttribute("alt")) {
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$output = "[" . $node->getAttribute("alt") . "]";
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} else {
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$output = "";
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}
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break;
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case "li":
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$output .= "\n";
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break;
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default:
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// do nothing
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}
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return $output;
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}
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}
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