clav.c

   1 #include <locale.h>
   2 #include <stdint.h>
   3 #include <stdio.h>
   4
   5 #include "macros.h"
   6 #include "quiver.h"
   7 #include "ui.h"
   8
   9 /* The general state of the application */
  10 static enum {
  11         ST_DEFAULT = 0,
  12         ST_ASKING_QUIT,
  13         ST_SHOULD_QUIT
  14 } state;
  15
  16 /* Having received some kind of input, change state accordingly */
  17 static int state_transition(struct ui_event *e)
  18 {
  19         int ret = 0;
  20
  21         switch (state) {
  22         case ST_SHOULD_QUIT:
  23                 break;
  24         case ST_DEFAULT:
  25
  26                 switch (e->type) {
  27                 case ET_INITIAL_QUIT:
  28                         ret = ui_confirm_deny("Quit?");
  29                         state = ST_ASKING_QUIT;
  30                         break;
  31                 case ET_FORCE_QUIT:
  32                         state = ST_SHOULD_QUIT;
  33                         break;
  34                 case ET_NONE:
  35                 case ET_CONFIRM:
  36                 case ET_DENY:
  37                         break;
  38                 }
  39
  40                 break;
  41         case ST_ASKING_QUIT:
  42
  43                 switch (e->type) {
  44                 case ET_CONFIRM:
  45                 case ET_FORCE_QUIT:
  46                         state = ST_SHOULD_QUIT;
  47                         break;
  48                 case ET_DENY:
  49                         state = ST_DEFAULT;
  50                         break;
  51                 case ET_NONE:
  52                 case ET_INITIAL_QUIT:
  53                         break;
  54                 }
  55
  56                 break;
  57         }
  58
  59         if (ret) {
  60                 state = ST_SHOULD_QUIT;
  61         }
  62
  63         return ret;
  64 }
  65
  66 /* Main loop */
  67 int main(int argc, char **argv)
  68 {
  69         int ret;
  70         uint_fast8_t more_evs = 0;
  71         struct ui_event e = { 0 };
  72         struct quiver q = { 0 };
  73         size_t v0, vinf, v1, v2, v1b, v2b, v12, v21, v23, v32, v30, v03, v10,
  74                v01;
  75
  76         UNUSED(argc);
  77         UNUSED(argv);
  78         setlocale(LC_ALL, "");
  79
  80         if ((ret = ui_init(&q))) {
  81                 goto done;
  82         }
  83
  84         {
  85                 /* XXX: rem (this is C2 U_{02} C2) */
  86                 quiver_add_vertex(&q, &v0,   "0",      1,    0, -170, 0);
  87                 quiver_add_vertex(&q, &vinf, "\u221e", 2,    0,  170, 0);
  88                 quiver_add_vertex(&q, &v1,   "1",      2,  100,  100, 0);
  89                 quiver_add_vertex(&q, &v2,   "2",      1,  170,  -70, 0);
  90                 quiver_add_vertex(&q, &v1b,  "1'",     2, -140,  100, 0);
  91                 quiver_add_vertex(&q, &v2b,  "2'",     1, -110,  -70, 0);
  92                 quiver_add_vertex(&q, &v12,  "12",     2, -350, -150, 0);
  93                 quiver_add_vertex(&q, &v21,  "21",     1, -150, -350, 0);
  94                 quiver_add_vertex(&q, &v32,  "32",     1,  350, -150, 0);
  95                 quiver_add_vertex(&q, &v23,  "23",     2,  150, -350, 0);
  96                 quiver_add_vertex(&q, &v30,  "30",     2,  350,  150, 0);
  97                 quiver_add_vertex(&q, &v03,  "03",     1,  150,  350, 0);
  98                 quiver_add_vertex(&q, &v10,  "10",     1, -350,  150, 0);
  99                 quiver_add_vertex(&q, &v01,  "01",     2, -150,  350, 0);
 100                 /* edges */
 101                 quiver_add_to_edge(&q, v12,  v21,  1, 2, 0);
 102                 quiver_add_to_edge(&q, v23,  v32,  1, 2, 0);
 103                 quiver_add_to_edge(&q, v10,  v01,  1, 2, 0);
 104                 quiver_add_to_edge(&q, v30,  v03,  1, 2, 0);
 105                 quiver_add_to_edge(&q, v21,  v2b,  1, 1, 0);
 106                 quiver_add_to_edge(&q, v23,  v1,   1, 1, 0);
 107                 quiver_add_to_edge(&q, v12,  v1b,  1, 1, 0);
 108                 quiver_add_to_edge(&q, v2b,  v12,  1, 1, 0);
 109                 quiver_add_to_edge(&q, v2b,  v0,   1, 1, 0);
 110                 quiver_add_to_edge(&q, v2b,  v10,  1, 1, 0);
 111                 quiver_add_to_edge(&q, v0,   v32,  1, 1, 0);
 112                 quiver_add_to_edge(&q, v0,   v1b,  1, 1, 0);
 113                 quiver_add_to_edge(&q, v32,  v2,   1, 1, 0);
 114                 quiver_add_to_edge(&q, v1b,  vinf, 1, 1, 0);
 115                 quiver_add_to_edge(&q, v1,   v30,  1, 1, 0);
 116                 quiver_add_to_edge(&q, v1,   v2,   1, 1, 0);
 117                 quiver_add_to_edge(&q, v2,   v0,   1, 1, 0);
 118                 quiver_add_to_edge(&q, v2,   v23,  1, 1, 0);
 119                 quiver_add_to_edge(&q, v2,   v03,  1, 1, 0);
 120                 quiver_add_to_edge(&q, v10,  v21,  1, 1, 0);
 121                 quiver_add_to_edge(&q, vinf, v1,   1, 1, 0);
 122                 quiver_add_to_edge(&q, vinf, v01,  1, 1, 0);
 123                 quiver_add_to_edge(&q, v30,  vinf, 1, 1, 0);
 124                 quiver_add_to_edge(&q, v01,  v1b,  1, 1, 0);
 125                 quiver_add_to_edge(&q, v03,  v1,   1, 1, 0);
 126
 127
 128                 if ((ret = ui_respond_quiver_change())) {
 129                         goto done;
 130                 }
 131         }
 132
 133         if ((ret = ui_start_frame())) {
 134                 goto done;
 135         }
 136
 137         while (state != ST_SHOULD_QUIT) {
 138                 /* includes framelimiting delay */
 139                 if ((ret = ui_finish_frame())) {
 140                         goto done;
 141                 }
 142
 143                 more_evs = 1;
 144
 145                 while (more_evs) {
 146                         if ((ret = ui_get_event(&e, &more_evs))) {
 147                                 goto done;
 148                         }
 149
 150                         if (e.type) {
 151                                 state_transition(&e);
 152                         }
 153                 }
 154
 155                 if ((ret = ui_start_frame())) {
 156                         goto done;
 157                 }
 158         }
 159
 160 done:
 161         ui_teardown();
 162
 163         return ret;
 164 }