From 11bcac5802dbdd01ee37b97e84f9a91c5777d9e6 Mon Sep 17 00:00:00 2001
From: alecpl <alec@alec.pl>
Date: Wed, 29 Sep 2010 09:32:41 -0400
Subject: [PATCH] - Fix HTML to plain text conversion doesn't handle citation blocks (#1486921)
---
program/lib/html2text.php | 131 ++++++++++++++++++++++++++++++++++---------
1 files changed, 102 insertions(+), 29 deletions(-)
diff --git a/program/lib/html2text.php b/program/lib/html2text.php
index 9c5267f..aa5df0e 100644
--- a/program/lib/html2text.php
+++ b/program/lib/html2text.php
@@ -201,7 +201,7 @@
"\t* \\1\n", // <li> and </li>
"\n\t* ", // <li>
"\n-------------------------\n", // <hr>
- "<div>\n", // <div>
+ "<div>\n", // <div>
"\n\n", // <table> and </table>
"\n", // <tr> and </tr>
"\t\t\\1\n", // <td> and </td>
@@ -445,12 +445,7 @@
}
/**
- * Workhorse function that does actual conversion.
- *
- * First performs custom tag replacement specified by $search and
- * $replace arrays. Then strips any remaining HTML tags, reduces whitespace
- * and newlines to a readable format, and word wraps the text to
- * $width characters.
+ * Workhorse function that does actual conversion (calls _converter() method).
*
* @access private
* @return void
@@ -462,6 +457,37 @@
$this->_link_list = '';
$text = trim(stripslashes($this->html));
+
+ // Convert HTML to TXT
+ $this->_converter($text);
+
+ // Add link list
+ if ( !empty($this->_link_list) ) {
+ $text .= "\n\nLinks:\n------\n" . $this->_link_list;
+ }
+
+ $this->text = $text;
+
+ $this->_converted = true;
+ }
+
+ /**
+ * Workhorse function that does actual conversion.
+ *
+ * First performs custom tag replacement specified by $search and
+ * $replace arrays. Then strips any remaining HTML tags, reduces whitespace
+ * and newlines to a readable format, and word wraps the text to
+ * $width characters.
+ *
+ * @param string Reference to HTML content string
+ *
+ * @access private
+ * @return void
+ */
+ function _converter(&$text)
+ {
+ // Convert <BLOCKQUOTE> (before PRE!)
+ $this->_convert_blockquotes($text);
// Convert <PRE>
$this->_convert_pre($text);
@@ -485,21 +511,12 @@
$text = preg_replace("/\n\s+\n/", "\n\n", $text);
$text = preg_replace("/[\n]{3,}/", "\n\n", $text);
- // Add link list
- if ( !empty($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
// If width is 0 or less, don't wrap the text.
if ( $this->width > 0 ) {
$text = wordwrap($text, $this->width);
}
-
- $this->text = $text;
-
- $this->_converted = true;
}
/**
@@ -517,20 +534,22 @@
*/
function _build_link_list( $link, $display )
{
- if ( !$this->_do_links ) return $display;
-
- if ( substr($link, 0, 7) == 'http://' || substr($link, 0, 8) == 'https://' ||
- substr($link, 0, 7) == 'mailto:' ) {
+ if ( !$this->_do_links )
+ return $display;
+
+ if ( substr($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";
+ $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
- $additional = '';
+ } elseif ( substr($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;
+ $this->_link_list .= '[' . $this->_link_count . '] ' . $this->url;
if ( substr($link, 0, 1) != '/' ) {
$this->_link_list .= '/';
}
@@ -540,7 +559,7 @@
return $display . $additional;
}
-
+
/**
* Helper function for PRE body conversion.
*
@@ -549,9 +568,65 @@
*/
function _convert_pre(&$text)
{
- while(preg_match('/<pre[^>]*>(.*)<\/pre>/ismU', $text, $matches)) {
+ 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>', $text, 1);
+ }
+ }
+
+ /**
+ * Helper function for BLOCKQUOTE body conversion.
+ *
+ * @param string HTML content
+ * @access private
+ */
+ function _convert_blockquotes(&$text)
+ {
+ if (preg_match_all('/<\/*blockquote[^>]*>/i', $text, $matches, PREG_OFFSET_CAPTURE)) {
+ $level = 0;
+ $diff = 0;
+ foreach ($matches[0] as $m) {
+ if ($m[0][0] == '<' && $m[0][1] == '/') {
+ $level--;
+ if ($level < 0) {
+ $level = 0; // malformed HTML: go to next blockquote
+ }
+ else if ($level > 0) {
+ // skip inner blockquote
+ }
+ else {
+ $end = $m[1];
+ $len = $end - $taglen - $start;
+ // Get blockquote content
+ $body = substr($text, $start + $taglen - $diff, $len);
+
+ // Set text width
+ $p_width = $this->width;
+ if ($this->width > 0) $this->width -= 2;
+ // Convert blockquote content
+ $body = trim($body);
+ $this->_converter($body);
+ // Add citation markers and create PRE block
+ $body = preg_replace('/((^|\n)>*)/', '\\1> ', trim($body));
+ $body = '<pre>' . htmlspecialchars($body) . '</pre>';
+ // Re-set text width
+ $this->width = $p_width;
+ // Replace content
+ $text = substr($text, 0, $start - $diff)
+ . $body . substr($text, $end + strlen($m[0]) - $diff);
+
+ $diff = $len + $taglen + strlen($m[0]) - strlen($body);
+ unset($body);
+ }
+ }
+ else {
+ if ($level == 0) {
+ $start = $m[1];
+ $taglen = strlen($m[0]);
+ }
+ $level ++;
+ }
+ }
}
}
@@ -592,5 +667,3 @@
return strtoupper($str);
}
}
-
-?>
--
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