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- Fix HTML to plain text conversion doesn't handle citation blocks (#1486921)

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This commit is contained in:
alecpl
2010-09-29 13:32:41 +00:00
parent b3660bbdc3
commit 11bcac5802
3 changed files with 106 additions and 32 deletions
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131
program/lib/html2text.php
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@@ -201,7 +201,7 @@ class html2text
"\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 @@ class html2text
}
/**
* 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
@@ -463,6 +458,37 @@ class html2text
$text = trim(stripslashes($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 @@ class html2text
$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 @@ class html2text
*/
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 @@ class html2text
return $display . $additional;
}
/**
* Helper function for PRE body conversion.
*
@@ -549,12 +568,68 @@ class html2text
*/
function _convert_pre(&$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]);
}
$level ++;
}
}
}
}
/**
* Callback function for preg_replace_callback use.
*
@@ -592,5 +667,3 @@ class html2text
return strtoupper($str);
}
}
?>