Support reverse video.

terminal.cpp

@@ -138,6 +138,11 @@ void Emulator::debug_printout( int fd )
   }
   screen.append( "\033\\" );
 
+  /* set reverse video */
+  char rev[ 8 ];
+  snprintf( rev, 8, "\033[?5%c", (fb.ds.reverse_video ? 'h' : 'l') );
+  screen.append( rev );
+
   for ( int y = 0; y < fb.ds.get_height(); y++ ) {
     for ( int x = 0; x < fb.ds.get_width(); /* let charwidth handle advance */ ) {
       char curmove[ 32 ];

terminalframebuffer.cpp

@@ -47,7 +47,8 @@ DrawState::DrawState( int s_width, int s_height )
     scrolling_region_top_row( 0 ), scrolling_region_bottom_row( height - 1 ),
     renditions(), save(),
     next_print_will_wrap( false ), origin_mode( false ), auto_wrap_mode( true ),
-    insert_mode( false ), cursor_visible( true ), application_mode_cursor_keys( false )
+    insert_mode( false ), cursor_visible( true ), reverse_video( false ),
+    application_mode_cursor_keys( false )
 {
   for ( int i = 0; i < width; i++ ) {
     tabs[ i ] = ( (i % 8) == 0 );

terminalframebuffer.hpp

@@ -69,6 +69,7 @@ namespace Terminal {
     bool auto_wrap_mode;
     bool insert_mode;
     bool cursor_visible;
+    bool reverse_video;
 
     bool application_mode_cursor_keys;
 

terminalfunctions.cpp

@@ -210,7 +210,7 @@ static bool *get_DEC_mode( int param, Framebuffer *fb ) {
   switch ( param ) {
   case 1: /* cursor key mode */
     return &(fb->ds.application_mode_cursor_keys);
-  case 3: /* 80/132 */
+  case 3: /* 80/132. Ignore but clear screen. */
     /* clear screen */
     fb->ds.move_row( 0 );
     fb->ds.move_col( 0 );
@@ -218,6 +218,8 @@ static bool *get_DEC_mode( int param, Framebuffer *fb ) {
       clearline( fb, y, 0, fb->ds.get_width() - 1 );
     }
     return NULL;
+  case 5: /* reverse video */
+    return &(fb->ds.reverse_video);
   case 6: /* origin */
     fb->ds.move_row( 0 );
     fb->ds.move_col( 0 );