Console modes: cursor style

[Thomas Wolff]

The attached patch adds two escape control sequences to the Cygwin Console:

 * Show/Hide Cursor (DECTCEM)
 * Set cursor style (DECSCUSR): block vs. underline cursor, or
   arbitrary size (as an extension, using values > 4)

Thomas


2013-01-13  Thomas Wolff  <t...@towo.net>

        * fhandler.h (class dev_console): Flag for expanded control sequence.
        * fhandler_console.cc (char_command): Supporting cursor style modes.


diff -rup sav/fhandler.h ./fhandler.h
--- sav/fhandler.h      2012-10-13 14:34:17.000000000 +0200
+++ ./fhandler.h        2013-01-08 16:02:54.601269200 +0100
@@ -1246,6 +1246,7 @@ class dev_console
   unsigned rarg;
   bool saw_question_mark;
   bool saw_greater_than_sign;
+  bool saw_space;
   bool vt100_graphics_mode_G0;
   bool vt100_graphics_mode_G1;
   bool iso_2022_G1;
diff -rup sav/fhandler_console.cc ./fhandler_console.cc
--- sav/fhandler_console.cc     2012-08-17 17:57:30.000000000 +0200
+++ ./fhandler_console.cc       2013-01-08 16:50:05.467534000 +0100
@@ -1510,6 +1510,31 @@ fhandler_console::char_command (char c)
           }
        dev_state.set_color (get_output_handle ());
       break;
+    case 'q': /* Set cursor style (DECSCUSR) */
+      if (dev_state.saw_space)
+       {
+           CONSOLE_CURSOR_INFO console_cursor_info;
+           GetConsoleCursorInfo (get_output_handle (), & console_cursor_info);
+           switch (dev_state.args_[0])
+             {
+               case 0: /* blinking block */
+               case 1: /* blinking block (default) */
+               case 2: /* steady block */
+                 console_cursor_info.dwSize = 100;
+                 SetConsoleCursorInfo (get_output_handle (), & 
console_cursor_info);
+                 break;
+               case 3: /* blinking underline */
+               case 4: /* steady underline */
+                 console_cursor_info.dwSize = 10;      /* or Windows default 
25? */
+                 SetConsoleCursorInfo (get_output_handle (), & 
console_cursor_info);
+                 break;
+               default: /* use value as percentage */
+                 console_cursor_info.dwSize = dev_state.args_[0];
+                 SetConsoleCursorInfo (get_output_handle (), & 
console_cursor_info);
+                 break;
+             }
+       }
+      break;
     case 'h':
     case 'l':
       if (!dev_state.saw_question_mark)
@@ -1525,6 +1550,17 @@ fhandler_console::char_command (char c)
        }
       switch (dev_state.args_[0])
        {
+       case 25: /* Show/Hide Cursor (DECTCEM) */
+         {
+           CONSOLE_CURSOR_INFO console_cursor_info;
+           GetConsoleCursorInfo (get_output_handle (), & console_cursor_info);
+           if (c == 'h')
+             console_cursor_info.bVisible = TRUE;
+           else
+             console_cursor_info.bVisible = FALSE;
+           SetConsoleCursorInfo (get_output_handle (), & console_cursor_info);
+           break;
+         }
        case 47:   /* Save/Restore screen */
          if (c == 'h') /* save */
            {
@@ -1752,7 +1788,7 @@ fhandler_console::char_command (char c)
          __small_sprintf (buf, "\033[%d;%dR", y + 1, x + 1);
          puts_readahead (buf);
          break;
-    default:
+      default:
          goto bad_escape;
        }
       break;
@@ -2026,6 +2062,7 @@ fhandler_console::write (const void *vsr
              dev_state.state_ = gotsquare;
              dev_state.saw_question_mark = false;
              dev_state.saw_greater_than_sign = false;
+             dev_state.saw_space = false;
              for (dev_state.nargs_ = 0; dev_state.nargs_ < MAXARGS; 
dev_state.nargs_++)
                dev_state.args_[dev_state.nargs_] = 0;
              dev_state.nargs_ = 0;
@@ -2092,6 +2129,12 @@ fhandler_console::write (const void *vsr
              if (dev_state.nargs_ >= MAXARGS)
                dev_state.nargs_--;
            }
+         else if (*src == ' ')
+           {
+             src++;
+             dev_state.saw_space = true;
+             dev_state.state_ = gotcommand;
+           }
          else
            {
              dev_state.state_ = gotcommand;