Fix tabbing bug

terminalframebuffer.cpp

@@ -236,3 +236,16 @@ int DrawState::limit_bottom( void )
 {
   return origin_mode ? scrolling_region_bottom_row : height - 1;
 }
+
+std::vector<int> DrawState::get_tabs( void )
+{
+  std::vector<int> ret;
+
+  for ( int i = 0; i < width; i++ ) {
+    if ( tabs[ i ] ) {
+      ret.push_back( i );
+    }
+  }
+
+  return ret;
+}

terminalframebuffer.hpp

@@ -65,6 +65,8 @@ namespace Terminal {
     void clear_tab( int col );
     int get_next_tab( void );
 
+    std::vector<int> get_tabs( void );
+
     void set_scrolling_region( int top, int bottom );
 
     int limit_top( void );

terminalfunctions.cpp

@@ -163,12 +163,16 @@ static Function func_Ctrl_HTS( CONTROL, "\x88", Ctrl_HTS );
 
 void CSI_TBC( Framebuffer *fb, Dispatcher *dispatch )
 {
-  if ( dispatch->getparam( 0, 0 ) == 3 ) { /* clear all tab stops */
+  int param = dispatch->getparam( 0, 0 );
+  switch ( param ) {
+  case 0: /* clear this tab stop */
+    fb->ds.clear_tab( fb->ds.get_cursor_col() );    
+    break;
+  case 3: /* clear all tab stops */
     for ( int x = 0; x < fb->ds.get_width(); x++ ) {
       fb->ds.clear_tab( x );
     }
-  } else {
-    fb->ds.clear_tab( fb->ds.get_cursor_col() );
+    break;
   }
 }