*/
/**
* Convert line breaks into in an intelligent fashion.
*
* Policy
* * Do not touch original tags that are already in the data
* * Allow duplicate line breaks (eg:
)
* * Do not touch line break inside of a HTML tag (line break between < and >)
* * Do not touch line break right after HTML tag
* * Do not convert line breaks in the following tag block
* , ,
...
* ... , ,
* * Enclose the entire text with
....
tag
*/
function _filter_brbr($text) {
// 1. cross-platform line break to UNIX line breaks
$text = str_replace(array("\r\n", "\r"), "\n", $text);
// 2. change line break inside of HTML tags to temporary line break markers
// so that step 5 does not change them to
$text = preg_replace('/<([^>\n]*)\n([^<\n]*)>/i', "<$1##!!LB!!##$2>", $text);
// 3a. change line break right after the HTML tags to temporary line break
// markers so that step 5 does not change them to
// $text = preg_replace('/>(\s*?)\n/', ">$1##!!LB!!##", $text);
// do not convert line break to after the following tags (start/end tags)
// line breaks after all the other tags are converted to
$text = preg_replace('/<(\/*?\s*?)(th|td|tr|thead|tbody|tfoot|table|address|li|ul|ol|dt|dd|dl|div|span|caption|colgroup|p|br|blockquote|hr|h[1-6]|img)(\s*?.*?)>(\s*?)\n/i', "<$1$2$3>$4##!!LB!!##", $text);
// converts line break after HTML tag to if the next line does not start with
// HTML tag
// NOTE: Problem!!!
// The following case will add before the 1st line of
contents!
//
// 1. First item
// 2. Second item
//
//
// $text = preg_replace('/>(\s*?)\n(\s*?)(<)/', ">$1##!!LB!!##$2$3", $text);
// 3b. change line break right after pseudo tag to temporary line break
// markers so that step 5 does not change them to
$text = preg_replace('/\](\s*?)\n/', "]$1##!!LB!!##", $text);
// 4. change the in the original data to temporary br tag marker
// so that step 6 does not remove them
$text = preg_replace('/<\s*br\s*\/?>/i', "##!!BR!!##", $text);
// 5. insert for each line break
$text = str_replace("\n", " \n", $text);
// 6. do not insert for the line breaks inside the
// , , , ,
// , tag block
$text = preg_replace('/()(.*?)<\/object>/ise', "_clr_br('$0')", $text);
$text = preg_replace('/()(.*?)<\/form>/ise', "_clr_br('$0')", $text);
$text = preg_replace('/()(.*?)<\/pre>/ise', "_clr_br('$0')", $text);
$text = preg_replace('/()(.*?)<\/code>/ise', "_clr_br('$0')", $text);
$text = preg_replace('/()(.*?)<\/style>/ise', "_clr_br('$0')", $text);
$text = preg_replace('/()(.*?)<\/script>/ise', "_clr_br('$0')", $text);
// do not insert for the line breaks inside the PHP code
$text = preg_replace('/(<\?php)(.*?)\?>/ise', "_clr_br('$0')", $text);
// 7. Change the temporary line break markers back to line breaks
$text = str_replace("##!!LB!!##", "\n", $text);
// 8. Change the temporary br tag marker back to the BR tag
$text = str_replace("##!!BR!!##", " ", $text);
// 9. finally, create a paragraph block that covers all the text data
$text="
\n".$text."
\n";
return $text;
}
function _clr_br($str){
$str = str_replace(" ","",$str);
$str = str_replace('\"','"',$str);
return $str;
}
/**
* Implements hook_filter_info()
*/
function brbr_filter_info() {
$filters['brbr'] = array(
'title' => t('brbr line break converter'),
'description' => t('Converts line breaks to <br /> tags. It allows multiple line breaks and converts them into multiple <br /> tags.'),
'process callback' => 'brbr_filter_process',
'tips callback' => 'brbr_filter_tips',
);
return $filters;
}
/**
* Implementation of hook_filter()
*/
function brbr_filter_process($text, $filter, $format, $langcode, $cache, $cache_id) {
if (empty($text)) return $text;
//--DEBUG
// brbr_debugout("----before filter----");
// brbr_debugout($text);
$text = _filter_brbr($text);
//--DEBUG
// brbr_debugout("----after filter----");
// brbr_debugout($text);
return $text;
}
/**
* Implements hook_filter_FILTER_tips()
*/
function brbr_filter_tips($filter, $format, $long) {
return t('Converts line breaks to <br /> tags. It allows multiple line breaks and converts them into multiple <br /> tags.');
}
/**
* Debug function
*/
function brbr_debugout($str) {
// return; // for production
$outfile = "/tmp/brbr.txt";
if(is_array($str) || is_object($str)) {
error_log(print_r($str, TRUE) . "\n", 3, $outfile);
}
else {
error_log($str . "\n", 3, $outfile);
}
}