#458 - Issue Added RTL support for Arabic writers.

Signed-off-by: 8n-tech <8n-tech@users.noreply.github.com>

inc/functions.php

@@ -2266,8 +2266,27 @@ function markup(&$body, $track_cites = false, $op = false) {
 
 	if ($config['strip_superfluous_returns'])
 		$body = preg_replace('/\s+$/', '', $body);
-
-	$body = preg_replace("/\n/", '<br/>', $body);
+	
+	if ($config['markup_paragraphs']) {
+		$paragraphs = explode("\n", $body);
+		$bodyNew = "";
+		
+		foreach ($paragraphs as $paragraph) {
+			if (strlen(trim($paragraph)) > 0) {
+				$paragraphDirection = is_rtl($paragraph) ? "rtl" : "ltr";
+			}
+			else {
+				$paragraphDirection = "empty";
+			}
+			
+			$bodyNew .= "<p class=\"body-line {$paragraphDirection}\">" . $paragraph . "</p>";
+		}
+		
+		$body = $bodyNew;
+	}
+	else {
+		$body = preg_replace("/\n/", '<br/>', $body);
+	}
 	
 	if ($config['markup_repair_tidy']) {
 		$tidy = new tidy();
@@ -2324,6 +2343,40 @@ function ordutf8($string, &$offset) {
 	return $code;
 }
 
+function uniord($u) {
+	$k = mb_convert_encoding($u, 'UCS-2LE', 'UTF-8');
+	$k1 = ord(substr($k, 0, 1));
+	$k2 = ord(substr($k, 1, 1));
+	return $k2 * 256 + $k1;
+}
+
+function is_rtl($str) {
+	if(mb_detect_encoding($str) !== 'UTF-8') {
+		$str = mb_convert_encoding($str, mb_detect_encoding($str),'UTF-8');
+	}
+	
+	preg_match_all('/[^\n\s]+/', $str, $matches);
+	preg_match_all('/.|\n\s/u', $str, $matches);
+	$chars = $matches[0];
+	$arabic_count = 0;
+	$latin_count = 0;
+	$total_count = 0;
+	
+	foreach ($chars as $char) {
+		$pos = uniord($char);
+		
+		if ($pos >= 1536 && $pos <= 1791) {
+			$arabic_count++;
+		}
+		else if ($pos > 123 && $pos < 123) {
+			$latin_count++;
+		}
+		$total_count++;
+	}
+	
+	return (($arabic_count/$total_count) > 0.5);
+}
+
 function strip_combining_chars($str) {
 	$chars = preg_split('//u', $str, -1, PREG_SPLIT_NO_EMPTY);
 	$str = '';

inc/instance-config.php

@@ -140,6 +140,7 @@
 	$config['additional_javascript'][] = 'js/auto-scroll.js';
 	$config['additional_javascript'][] = 'js/twemoji/twemoji.js';
 	$config['additional_javascript'][] = 'js/file-selector.js';
+	$config['additional_javascript'][] = 'js/board-directory.js';
 	// Oekaki (now depends on config.oekaki so can be in all scripts)
 	$config['additional_javascript'][] = 'js/jquery-ui.custom.min.js';
 	$config['additional_javascript'][] = 'js/wPaint/8ch.js';
@@ -160,6 +161,9 @@
 	$config['markup'][] = array("/__(.+?)__/", "<u>\$1</u>");
 	$config['markup'][] = array("/###([^\s']+)###/", "<a href='/boards.html#\$1'>###\$1###</a>");
 	
+	$config['markup_paragraphs'] = true;
+	$config['markup_rtl'] = true;
+	
 	$config['boards'] = array(array('<i class="fa fa-home" title="Home"></i>' => '/', '<i class="fa fa-tags" title="Boards"></i>' => '/boards.html', '<i class="fa fa-question" title="FAQ"></i>' => '/faq.html', '<i class="fa fa-random" title="Random"></i>' => '/random.php', '<i class="fa fa-plus" title="New board"></i>' => '/create.php', '<i class="fa fa-ban" title="Public ban list"></i>' => '/bans.html', '<i class="fa fa-search" title="Search"></i>' => '/search.php', '<i class="fa fa-cog" title="Manage board"></i>' => '/mod.php', '<i class="fa fa-quote-right" title="Chat"></i>' => 'https://qchat.rizon.net/?channels=#8chan'), array('b', 'news+', 'boards'), array('operate', 'meta'), array('<i class="fa fa-twitter" title="Twitter"></i>'=>'https://twitter.com/infinitechan'));
 	//$config['boards'] = array(array('<i class="fa fa-home" title="Home"></i>' => '/', '<i class="fa fa-tags" title="Boards"></i>' => '/boards.html', '<i class="fa fa-question" title="FAQ"></i>' => '/faq.html', '<i class="fa fa-random" title="Random"></i>' => '/random.php', '<i class="fa fa-plus" title="New board"></i>' => '/create.php', '<i class="fa fa-search" title="Search"></i>' => '/search.php', '<i class="fa fa-cog" title="Manage board"></i>' => '/mod.php', '<i class="fa fa-quote-right" title="Chat"></i>' => 'https://qchat.rizon.net/?channels=#8chan'), array('b', 'meta', 'int'), array('v', 'a', 'tg', 'fit', 'pol', 'tech', 'mu', 'co', 'sp', 'boards'), array('<i class="fa fa-twitter" title="Twitter"></i>'=>'https://twitter.com/infinitechan'));
 	

post.php

@@ -643,7 +643,8 @@ elseif (isset($_POST['post'])) {
 	
 	if (mysql_version() >= 50503) {
 		$post['body_nomarkup'] = $post['body']; // Assume we're using the utf8mb4 charset
-	} else {
+	}
+	else {
 		// MySQL's `utf8` charset only supports up to 3-byte symbols
 		// Remove anything >= 0x010000
 		

stylesheets/style.css

@@ -368,7 +368,12 @@ div.delete {
 }
 
 div.post.reply p {
-  margin: 0.3em 0 0 0;
+	display: block;
+	margin: 0;
+	
+	line-height: 1.16em;
+	font-size: 13px;
+	min-height: 1.16em;
 }
 
 div.post.reply div.body {
@@ -1070,6 +1075,14 @@ span.pln {
 	min-width:  48px;
 }
 
+/* Text and accessibility */
+.ltr {
+	direction: ltr;
+}
+.rtl {
+	direction: rtl;
+	font-family: Tahoma;
+}
 
 /* Responsive helpers */
 .col {