mdw@git.distorted.org.uk Git - sgt/tweak/blob - curses.c

   1 #include "tweak.h"
   2
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <ctype.h>
   7 #include <assert.h>
   8 #include <curses.h>
   9
  10 int display_rows, display_cols;
  11
  12 void display_beep(void)
  13 {
  14     beep();
  15 }
  16
  17 static void get_screen_size (void) {
  18     getmaxyx(stdscr, display_rows, display_cols);
  19 }
  20
  21 void display_setup(void)
  22 {
  23     initscr();
  24     noecho();
  25     keypad(stdscr, 0);
  26     raw();
  27     move(0,0);
  28     refresh();
  29     get_screen_size();
  30     if (has_colors()) {
  31         start_color();
  32         use_default_colors();
  33     }
  34 }
  35
  36 void display_cleanup(void)
  37 {
  38     endwin();
  39 }
  40
  41 void display_moveto(int y, int x)
  42 {
  43     wmove(stdscr, y, x);
  44 }
  45
  46 void display_refresh(void)
  47 {
  48     refresh();
  49 }
  50
  51 void display_write_str(char *str)
  52 {
  53     waddstr(stdscr, str);
  54 }
  55
  56 void display_write_chars(char *str, int len)
  57 {
  58     waddnstr(stdscr, str, len);
  59 }
  60
  61 #define MAXCOLOURS 32
  62 int attrs[MAXCOLOURS];
  63
  64 void display_define_colour(int colour, int fg, int bg, int reverse)
  65 {
  66     static int colours[8] = {
  67         COLOR_BLACK,
  68         COLOR_RED,
  69         COLOR_GREEN,
  70         COLOR_YELLOW,
  71         COLOR_BLUE,
  72         COLOR_MAGENTA,
  73         COLOR_CYAN,
  74         COLOR_WHITE,
  75     };
  76
  77     if (fg < 0 && bg < 0) {
  78         attrs[colour] = 0;
  79     } else {
  80         assert(colour >= 0 && colour < MAXCOLOURS);
  81         assert(!(bg & ~7));            /* bold backgrounds are nonportable */
  82         if (colour < COLOR_PAIRS-2) {
  83             init_pair(colour+1, colours[fg & 7], colours[bg]);
  84             attrs[colour] = (fg & 8 ? A_BOLD : 0) | COLOR_PAIR(colour+1);
  85         } else {
  86             /* can't allocate a colour pair, so we just use b&w attrs */
  87             attrs[colour] = (fg & 8 ? A_BOLD : 0) | (reverse ? A_REVERSE : 0);
  88         }
  89     }
  90 }
  91
  92 void display_set_colour(int colour)
  93 {
  94     wattrset(stdscr, attrs[colour]);
  95 }
  96
  97 void display_clear_to_eol(void)
  98 {
  99     wclrtoeol(stdscr);
 100 }
 101
 102 int last_getch = ERR;
 103
 104 int display_getkey(void)
 105 {
 106     int ret;
 107     extern void schedule_update(void);
 108
 109     if (last_getch != ERR) {
 110         int ret = last_getch;
 111         last_getch = ERR;
 112         return ret;
 113     }
 114     while (1) {
 115         ret = getch();
 116         if (ret == KEY_RESIZE) {
 117             schedule_update();
 118             continue;
 119         }
 120         return ret;
 121     }
 122 }
 123
 124 int display_input_to_flush(void)
 125 {
 126     int ret;
 127     if (last_getch != ERR)
 128         return TRUE;
 129
 130     nodelay(stdscr, 1);
 131     ret = getch();
 132     nodelay(stdscr, 0);
 133     if (ret == ERR)
 134         return FALSE;
 135
 136     last_getch = ret;
 137     return TRUE;
 138 }
 139
 140 void display_post_error(void)
 141 {
 142     /* I don't _think_ we need do anything here */
 143 }
 144
 145 void display_recheck_size(void)
 146 {
 147     get_screen_size ();
 148 }