non-ascii support for the title editor

h-m-m

@@ -1088,16 +1088,30 @@ function insert_node(&$mm, $type)
 
 function show_line(&$mm, $title, $cursor, $shift)
 {
-	$output =
+	$output  = mb_substr($title,$shift,$mm['terminal_width']-1);
-		str_pad
+	$output .= str_repeat( ' ' ,$mm['terminal_width'] - mb_strlen($output) );
-		(
-			substr($title,$shift,$mm['terminal_width']-1),
-			$mm['terminal_width']
-		)
-	;
 
-	$output = substr_replace( $output, invert_off, $cursor-$shift  , 0);
+	// showing the cursor
-	$output = substr_replace( $output, invert_on,  $cursor-$shift-1, 0);
+	$output =
+		mb_substr
+		(
+			$output
+			,0
+			,$cursor-$shift-1
+		)
+		.invert_on
+		.mb_substr
+		(
+			$output
+			,$cursor-$shift-1
+			,1
+		)
+		.invert_off
+		.mb_substr
+		(
+			$output
+			,$cursor-$shift
+		);
 
 	put(0,$mm['terminal_height'],$mm['active_node_color'].$output);
 }
@@ -1109,7 +1123,7 @@ function edit_node(&$mm, $rewrite = false)
 	if ($mm['active_node']==0 && $title=='root') $title='';
 
 	$in = '';
-	$cursor = strlen($title)+1;
+	$cursor = mb_strlen($title)+1;
 	$shift = max( 0, $cursor - $mm['terminal_width'] );
 
 	show_line($mm, $title, $cursor, $shift);
@@ -1130,16 +1144,20 @@ function edit_node(&$mm, $rewrite = false)
 			}
 
 			// up arrow and home
-			elseif ($in=="\033\133\101" || $in=="\033\133\110")  $cursor = 1;
+			elseif ($in=="\033\133\101" || $in=="\033\133\110")
+				$cursor = 1;
 
 			// right arrow
-			elseif ($in=="\033\133\103")  $cursor = min( strlen($title)+1, $cursor+1);
+			elseif ($in=="\033\133\103")
+				$cursor = min( mb_strlen($title)+1, $cursor+1);
 
 			// down arrow and end
-			elseif ($in=="\033\133\102" || $in=="\033\133\106")  $cursor = strlen($title)+1;
+			elseif ($in=="\033\133\102" || $in=="\033\133\106")
+				$cursor = mb_strlen($title)+1;
 
 			// left arrow
-			elseif ($in=="\033\133\104")  $cursor = max(1, $cursor-1);
+			elseif ($in=="\033\133\104")
+				$cursor = max(1, $cursor-1);
 
 			// ctrl+left and shift+left
 			elseif ($in=="\033\133\061\073\065\104" || $in=="\033\133\061\073\062\104")
@@ -1150,8 +1168,8 @@ function edit_node(&$mm, $rewrite = false)
 						(
 							1,
 							(
-								strrpos($title,' ',$cursor-strlen($title)-3) !== false
+								mb_strrpos($title,' ',$cursor-mb_strlen($title)-3) !== false
-								? strrpos($title,' ',$cursor-strlen($title)-3) + 2
+								? mb_strrpos($title,' ',$cursor-mb_strlen($title)-3) + 2
 								: 1
 							)
 						);
@@ -1159,15 +1177,15 @@ function edit_node(&$mm, $rewrite = false)
 			// ctrl+right and shift+right
 			elseif ($in=="\033\133\061\073\065\103" || $in=="\033\133\061\073\062\103")
 				$cursor =
-					$cursor > strlen($title) -2
+					$cursor > mb_strlen($title) -2
-					? strlen($title) + 1
+					? mb_strlen($title) + 1
 					: min
 						(
-							strlen($title)+1,
+							mb_strlen($title)+1,
 							(
-								strpos($title,' ',$cursor+1) !== false
+								mb_strpos($title,' ',$cursor+1) !== false
-								? strpos($title,' ',$cursor+1) + 2
+								? mb_strpos($title,' ',$cursor+1) + 2
-								: strlen($title) + 1
+								: mb_strlen($title) + 1
 							)
 						);
 
@@ -1185,7 +1203,18 @@ function edit_node(&$mm, $rewrite = false)
 			{
 				if ($cursor>1)
 				{
-					$title = substr_replace($title, '',  $cursor-2, 1);
+					$title =
+						mb_substr
+						(
+							$title
+							,0
+							,$cursor-2
+						)
+						.mb_substr
+						(
+							$title
+							,$cursor-1
+						);
 					$cursor--;
 				}
 			}
@@ -1200,7 +1229,19 @@ function edit_node(&$mm, $rewrite = false)
 			// delete
 			elseif ($in=="\033\133\63\176")
 			{
-				$title = substr_replace($title, '',  $cursor-1, 1);
+				// $title = substr_replace($title, '',  $cursor-1, 1);
+				$title =
+					mb_substr
+					(
+						$title
+						,0
+						,$cursor-1
+					)
+					.mb_substr
+					(
+						$title
+						,$cursor
+					);
 			}
 
 			// enter
@@ -1215,7 +1256,7 @@ function edit_node(&$mm, $rewrite = false)
 				return;
 			}
 
-			// pasting
+			// ctrl+v
 			elseif ($in=="\026")
 			{
 				$content = 
@@ -1233,16 +1274,42 @@ function edit_node(&$mm, $rewrite = false)
 							)
 						)
 					);
-				$title = substr_replace($title, $content, $cursor-1, 0);
+
+				$title =
+					mb_substr
+					(
+						$title
+						,0
+						,$cursor-1
+					)
+					.$content
+					.mb_substr
+					(
+						$title
+						,$cursor-1
+					);
+
 				$cursor += mb_strlen($content);
 			}
 
 
 			// normal characters
-			elseif (strlen($in)==1)
+			else
 			{
 				if ($in=="\011") $in='  ';
-				$title = substr_replace($title, $in, $cursor-1, 0);
+				$title =
+					mb_substr
+					(
+						$title
+						,0
+						,$cursor-1
+					)
+					.$in
+					.mb_substr
+					(
+						$title
+						,$cursor-1
+					);
 				$cursor++;
 			}