gpxe/src/hci/mucurses/clear.c

   1 #include <curses.h>
   2 #include "mucurses.h"
   3 #include "cursor.h"
   4
   5 /** @file
   6  *
   7  * MuCurses clearing functions
   8  *
   9  */
  10
  11 /**
  12  * Clear a window to the bottom from current cursor position
  13  *
  14  * @v *win      subject window
  15  * @ret rc      return status code
  16  */
  17 int wclrtobot ( WINDOW *win ) {
  18         struct cursor_pos pos;
  19
  20         _store_curs_pos( win, &pos );
  21         do {
  22                 _wputc( win, ' ', WRAP );
  23         } while ( win->curs_y + win->curs_x );
  24         _restore_curs_pos( win, &pos );
  25
  26         return OK;
  27 }
  28
  29 /**
  30  * Clear a window to the end of the current line
  31  *
  32  * @v *win      subject window
  33  * @ret rc      return status code
  34  */
  35 int wclrtoeol ( WINDOW *win ) {
  36         struct cursor_pos pos;
  37
  38         _store_curs_pos( win, &pos );
  39         while ( ( win->curs_y - pos.y ) == 0 ) {
  40                 _wputc( win, ' ', WRAP );
  41         }
  42         _restore_curs_pos( win, &pos );
  43
  44         return OK;
  45 }
  46
  47 /**
  48  * Delete character under the cursor in a window
  49  *
  50  * @v *win      subject window
  51  * @ret rc      return status code
  52  */
  53 int wdelch ( WINDOW *win ) {
  54         _wputc( win, ' ', NOWRAP );
  55         _wcursback( win );
  56
  57         return OK;
  58 }
  59
  60 /**
  61  * Delete line under a window's cursor
  62  *
  63  * @v *win      subject window
  64  * @ret rc      return status code
  65  */
  66 int wdeleteln ( WINDOW *win ) {
  67         struct cursor_pos pos;
  68
  69         _store_curs_pos( win, &pos );
  70         /* let's just set the cursor to the beginning of the line and
  71            let wclrtoeol do the work :) */
  72         wmove( win, win->curs_y, 0 );
  73         wclrtoeol( win );
  74         _restore_curs_pos( win, &pos );
  75         return OK;
  76 }
  77
  78 /**
  79  * Completely clear a window
  80  *
  81  * @v *win      subject window
  82  * @ret rc      return status code
  83  */
  84 int werase ( WINDOW *win ) {
  85         wmove( win, 0, 0 );
  86         wclrtobot( win );
  87         return OK;
  88 }