| 1 |
<?php // -*-php-*-
|
| 2 |
/*
|
| 3 |
* Original module by Alaa Abd El Fatah.
|
| 4 |
* Mohammed Sameer: My Modifications Copyright (c) 2004 Mohammed Sameer,
|
| 5 |
* under the GNU GPL v2 or later.
|
| 6 |
* Mohammed Sameer: 2004 10 30
|
| 7 |
* * Ported to drupal 4.5 API.
|
| 8 |
*
|
| 9 |
* 04/04/2005 Ported to drupal 4.6 API by Amr Mostafa
|
| 10 |
*/
|
| 11 |
|
| 12 |
setlocale(LC_ALL, "ar_EG.UTF-8");
|
| 13 |
|
| 14 |
|
| 15 |
/**
|
| 16 |
* Implementation of hook_help()
|
| 17 |
*/
|
| 18 |
function bidi_help($section) {
|
| 19 |
$output = "";
|
| 20 |
|
| 21 |
switch ($section) {
|
| 22 |
case 'admin/modules#description':
|
| 23 |
$output = t("Automaticaly sets line direction");
|
| 24 |
break;
|
| 25 |
}
|
| 26 |
|
| 27 |
return $output;
|
| 28 |
}
|
| 29 |
|
| 30 |
/**
|
| 31 |
* Implementation of hook_filter_tips()
|
| 32 |
*/
|
| 33 |
function bidi_filter_tips($delta, $format, $long = false) {
|
| 34 |
if ($long) {
|
| 35 |
return t("You may write mixed Arabic and English freely, line direction will be computed automaticaly");
|
| 36 |
}
|
| 37 |
else {
|
| 38 |
return t("You may write mixed Arabic and English freely, line direction will be computed automaticaly");
|
| 39 |
}
|
| 40 |
}
|
| 41 |
|
| 42 |
/**
|
| 43 |
* Implementation of hook_filter()
|
| 44 |
*/
|
| 45 |
function bidi_filter($op, $delta = 0, $format = -1, $text = "") {
|
| 46 |
switch ($op) {
|
| 47 |
case 'list':
|
| 48 |
return array(0 => t('BiDi'));
|
| 49 |
case 'description':
|
| 50 |
return t("Bidi filter");
|
| 51 |
case "process":
|
| 52 |
return _bidi_filter_process($text);
|
| 53 |
default:
|
| 54 |
return $text;
|
| 55 |
}
|
| 56 |
}
|
| 57 |
|
| 58 |
/**
|
| 59 |
* Determine text language (arabic or english).
|
| 60 |
* This function needs to be split into a single include file so it can be used on theme and other places.
|
| 61 |
*
|
| 62 |
* @param $text
|
| 63 |
* The text needs to be.
|
| 64 |
* @return
|
| 65 |
* right2left or left2right depending on the detected language.
|
| 66 |
*/
|
| 67 |
function _get_dir($text) {
|
| 68 |
$text = strtolower($text);
|
| 69 |
$len = strlen($text);
|
| 70 |
|
| 71 |
$arabic = 0;
|
| 72 |
$english = 0;
|
| 73 |
|
| 74 |
// constants
|
| 75 |
$a = ord('a');
|
| 76 |
$z = ord('z');
|
| 77 |
|
| 78 |
// arabic UTF-8 letters have one of these values in the 1st byte
|
| 79 |
$ar1 = 0xd8;
|
| 80 |
$ar2 = 0xd9;
|
| 81 |
|
| 82 |
// this calculates the dominant language in the text, most bidi implementations just use the first letter (which may be more efficient)
|
| 83 |
for ($i = 0; $i < $len; ++$i) {
|
| 84 |
$bin = ord($text[$i]);
|
| 85 |
|
| 86 |
if ($bin == $ar1 || $bin == $ar2) {
|
| 87 |
++$arabic;
|
| 88 |
++$i;
|
| 89 |
}
|
| 90 |
else if ($bin >= $a && $bin <= $z) {
|
| 91 |
++$english;
|
| 92 |
}
|
| 93 |
}
|
| 94 |
|
| 95 |
// should this return a bool instead?
|
| 96 |
if ($english || $arabic) {
|
| 97 |
if ($english > $arabic)
|
| 98 |
return ' dir="LTR" ';
|
| 99 |
else
|
| 100 |
return ' dir="RTL" ';
|
| 101 |
}
|
| 102 |
else {
|
| 103 |
return "";
|
| 104 |
}
|
| 105 |
}
|
| 106 |
|
| 107 |
/**
|
| 108 |
* Sets HTML text line directions (rtl or ltr) as needed.
|
| 109 |
*
|
| 110 |
* @param $text
|
| 111 |
* The HTML text needs to be processed.
|
| 112 |
*
|
| 113 |
* @return
|
| 114 |
* The processed result, with line directions are set using css
|
| 115 |
* classes "righ2left" and "left2right".
|
| 116 |
*/
|
| 117 |
function _bidi_filter_process($text) {
|
| 118 |
$output = "";
|
| 119 |
|
| 120 |
$len = strlen($text);
|
| 121 |
$i = 0;
|
| 122 |
|
| 123 |
while ($i < $len) {
|
| 124 |
// find next tag
|
| 125 |
$e = strpos(substr($text, $i), "<");
|
| 126 |
if ($e === FALSE) {
|
| 127 |
break;
|
| 128 |
}
|
| 129 |
|
| 130 |
$output .= substr($text, $i, $e);
|
| 131 |
|
| 132 |
$i += $e;
|
| 133 |
|
| 134 |
// find end of next tag
|
| 135 |
$e = strcspn(substr($text, $i), "/> ");
|
| 136 |
$tag = substr($text, $i+1, $e-1);
|
| 137 |
|
| 138 |
$output .= substr($text, $i, $e);
|
| 139 |
$i += $e;
|
| 140 |
|
| 141 |
switch ($tag) {
|
| 142 |
// single tag entity
|
| 143 |
case "img":
|
| 144 |
case "br":
|
| 145 |
case "hr":
|
| 146 |
continue;
|
| 147 |
break;
|
| 148 |
|
| 149 |
|
| 150 |
// block elements these get out attention
|
| 151 |
case "p":
|
| 152 |
case "ul":
|
| 153 |
case "ol":
|
| 154 |
case "dl":
|
| 155 |
case "pre":
|
| 156 |
case "h1":
|
| 157 |
case "h2":
|
| 158 |
case "h3":
|
| 159 |
case "h4":
|
| 160 |
case "h5":
|
| 161 |
case "h6":
|
| 162 |
|
| 163 |
// nested lists are proken better think of a fix
|
| 164 |
case "li":
|
| 165 |
$close_tag = "</".$tag.">";
|
| 166 |
// breaks on extra whitespaces, maybe I should use regexps instead
|
| 167 |
$e = strpos(substr($text, $i), $close_tag);
|
| 168 |
$content = substr($text, $i+1, $e-1);
|
| 169 |
// calculate directions
|
| 170 |
$output.= _get_dir(strip_tags($content));
|
| 171 |
$e += strlen($close_tag);
|
| 172 |
$output.= substr($text, $i, $e);
|
| 173 |
$i += $e;
|
| 174 |
break;
|
| 175 |
|
| 176 |
// non block tags we are not handeling
|
| 177 |
default:
|
| 178 |
$close_tag = "</".$tag.">";
|
| 179 |
$e = strpos(substr($text, $i), $close_tag) + strlen($close_tag);
|
| 180 |
$output.= substr($text, $i, $e);
|
| 181 |
$i += $e;
|
| 182 |
}
|
| 183 |
}
|
| 184 |
|
| 185 |
// any missing content
|
| 186 |
$output .= substr($text, $i);
|
| 187 |
|
| 188 |
return $output;
|
| 189 |
}
|
| 190 |
|
| 191 |
?>
|
Parent Directory
| 
Revision Log
| 
Revision Graph