lib/curses/curses.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Curses for Nit
  16 module curses is pkgconfig("ncurses")
  17
  18 in "C header" `{
  19         #include <ncurses.h>
  20 `}
  21
  22 # A curse windows
  23 extern class Window `{WINDOW *`}
  24         # Initialize the screen
  25         new `{
  26                 WINDOW *res;
  27                 res = initscr();
  28                 if (res == NULL) {
  29                         fprintf(stderr, "Error initialising ncurses.\n");
  30                         exit(EXIT_FAILURE);
  31                 }
  32                 raw();
  33                 keypad(res, TRUE);
  34                 noecho();
  35                 return res;
  36         `}
  37
  38         # Move the cursor at the position (y,x) and print a string
  39         # NOTE: as with the curses API, the position is (y,x)
  40         fun mvaddstr(y,x: Int, str: String) import String.to_cstring `{
  41                 char *c_string = String_to_cstring( str );
  42                 mvaddstr(y, x, c_string);
  43         `}
  44
  45         # Update the window
  46         fun refresh `{
  47                 refresh();
  48         `}
  49
  50         # Clear the entire window so it can be repainted from scratch with a refresh
  51         fun wclear `{
  52                 wclear(self);
  53         `}
  54
  55         # Delete the window
  56         fun delwin `{
  57                 delwin(self);
  58         `}
  59
  60         # Suspend the curses session and restore the previous terminal
  61         fun endwin `{
  62                 endwin();
  63         `}
  64 end