src/ui/console.c

   1 #include <ctype.h>
   2 #include <math.h>
   3
   4 #include "system/stacktrace.h"
   5
   6 #include "game.h"
   7 #include "game/level.h"
   8 #include "sdl/renderer.h"
   9 #include "system/log.h"
  10 #include "system/lt.h"
  11 #include "system/nth_alloc.h"
  12 #include "ui/console.h"
  13 #include "ui/console_log.h"
  14 #include "ui/edit_field.h"
  15 #include "ui/history.h"
  16 #include "math/extrema.h"
  17
  18 #define FONT_WIDTH_SCALE 3.0f
  19 #define FONT_HEIGHT_SCALE 3.0f
  20
  21 #define CONSOLE_LOG_CAPACITY 10
  22 #define HISTORY_CAPACITY 20
  23 #define PROMPT_HEIGHT (FONT_HEIGHT_SCALE * FONT_CHAR_HEIGHT)
  24 #define CONSOLE_LOG_HEIGHT (FONT_HEIGHT_SCALE * FONT_CHAR_HEIGHT * CONSOLE_LOG_CAPACITY)
  25
  26 #define CONSOLE_HEIGHT (CONSOLE_LOG_HEIGHT + PROMPT_HEIGHT)
  27
  28 #define SLIDE_DOWN_TIME 0.4f
  29
  30 #define CONSOLE_ALPHA (0.80f)
  31 #define CONSOLE_BACKGROUND (rgba(0.20f, 0.20f, 0.20f, CONSOLE_ALPHA))
  32 #define CONSOLE_FOREGROUND (rgba(0.80f, 0.80f, 0.80f, CONSOLE_ALPHA))
  33 #define CONSOLE_ERROR (rgba(0.80f, 0.50f, 0.50f, CONSOLE_ALPHA))
  34
  35 struct Console
  36 {
  37     Lt *lt;
  38     Edit_field edit_field;
  39     Console_Log *console_log;
  40     History *history;
  41     Game *game;
  42     float a;
  43 };
  44
  45 /* TODO(#356): Console does not support autocompletion */
  46
  47 Console *create_console(Game *game)
  48 {
  49     Lt *lt = create_lt();
  50
  51     Console *console = PUSH_LT(lt, nth_calloc(1, sizeof(Console)), free);
  52     if (console == NULL) {
  53         RETURN_LT(lt, NULL);
  54     }
  55     console->lt = lt;
  56
  57     console->edit_field.font_size = vec(FONT_WIDTH_SCALE, FONT_HEIGHT_SCALE);
  58     console->edit_field.font_color = CONSOLE_FOREGROUND;
  59
  60     console->console_log = PUSH_LT(
  61         lt,
  62         create_console_log(
  63             vec(FONT_WIDTH_SCALE, FONT_HEIGHT_SCALE),
  64             CONSOLE_LOG_CAPACITY),
  65         destroy_console_log);
  66
  67     console->a = 0;
  68
  69     console->history = PUSH_LT(
  70         lt,
  71         create_history(HISTORY_CAPACITY),
  72         destroy_history);
  73     if (console->history == NULL) {
  74         RETURN_LT(lt, NULL);
  75     }
  76
  77     console->game = game;
  78
  79     return console;
  80 }
  81
  82 void destroy_console(Console *console)
  83 {
  84     trace_assert(console);
  85     RETURN_LT0(console->lt);
  86 }
  87
  88 static int console_eval_input(Console *console)
  89 {
  90     const char *input_text = edit_field_as_text(&console->edit_field);
  91
  92     String input = string_nt(input_text);
  93     String command = chop_word(&input);
  94
  95     if (string_equal(command, STRING_LIT(""))) {
  96         edit_field_clean(&console->edit_field);
  97         return 0;
  98     }
  99
 100     if (history_push(console->history, input_text) < 0) {
 101         return -1;
 102     }
 103
 104     if (console_log_push_line(console->console_log, input_text, NULL, CONSOLE_FOREGROUND) < 0) {
 105         return -1;
 106     }
 107
 108     if (string_equal(command, STRING_LIT("load"))) {
 109         String level = chop_word(&input);
 110         console_log_push_line(console->console_log, "Loading level:", NULL, CONSOLE_FOREGROUND);
 111         console_log_push_line(console->console_log, level.data, level.data + level.count, CONSOLE_FOREGROUND);
 112         char level_name[256];
 113         memset(level_name, 0, 256);
 114         memcpy(level_name, level.data, min_size_t(level.count, 255));
 115
 116         if (game_load_level(console->game, level_name) < 0) {
 117             console_log_push_line(console->console_log, "Could not load level", NULL, CONSOLE_ERROR);
 118         }
 119     } else if (string_equal(command, STRING_LIT("menu"))) {
 120         console_log_push_line(console->console_log, "Loading menu", NULL, CONSOLE_FOREGROUND);
 121         game_switch_state(console->game, GAME_STATE_LEVEL_PICKER);
 122     } else {
 123         console_log_push_line(console->console_log, "Unknown command", NULL, CONSOLE_ERROR);
 124     }
 125
 126     edit_field_clean(&console->edit_field);
 127
 128     return 0;
 129 }
 130
 131 int console_handle_event(Console *console,
 132                          const SDL_Event *event)
 133 {
 134     switch(event->type) {
 135     case SDL_KEYDOWN: {
 136         switch(event->key.keysym.sym) {
 137         case SDLK_RETURN:
 138             return console_eval_input(console);
 139
 140         case SDLK_UP:
 141             edit_field_replace(
 142                 &console->edit_field,
 143                 history_current(console->history));
 144             history_prev(console->history);
 145             return 0;
 146
 147         case SDLK_p: {
 148             if (event->key.keysym.mod & KMOD_CTRL) {
 149                 edit_field_replace(
 150                     &console->edit_field,
 151                     history_current(console->history));
 152                 history_prev(console->history);
 153                 return 0;
 154             }
 155         } break;
 156
 157        case SDLK_l: {
 158             if (event->key.keysym.mod & KMOD_CTRL) {
 159                 console_log_clear(console->console_log);
 160                 return 0;
 161             }
 162         } break;
 163
 164         case SDLK_DOWN:
 165             edit_field_replace(
 166                 &console->edit_field,
 167                 history_current(console->history));
 168             history_next(console->history);
 169             return 0;
 170
 171         case SDLK_n: {
 172             if (event->key.keysym.mod & KMOD_CTRL) {
 173                 edit_field_replace(
 174                     &console->edit_field, history_current(console->history));
 175                 history_next(console->history);
 176                 return 0;
 177             }
 178         } break;
 179         }
 180     } break;
 181     }
 182
 183     return edit_field_event(&console->edit_field, event);
 184 }
 185
 186 int console_render(const Console *console,
 187                    const Camera *camera)
 188 {
 189     /* TODO(#364): console doesn't have any padding around the edit fields */
 190     SDL_Rect view_port;
 191     SDL_RenderGetViewport(camera->renderer, &view_port);
 192
 193     const float e = console->a * (2 - console->a);
 194     const float y = -(1.0f - e) * CONSOLE_HEIGHT;
 195
 196     if (camera_fill_rect_screen(
 197             camera,
 198             rect(0.0f, y,
 199                  (float) view_port.w,
 200                  CONSOLE_HEIGHT),
 201             CONSOLE_BACKGROUND) < 0) {
 202         return -1;
 203     }
 204
 205     console_log_render(console->console_log,
 206                        camera,
 207                        vec(0.0f, y));
 208
 209     if (edit_field_render_screen(&console->edit_field,
 210                                  camera,
 211                                  vec(0.0f, y + CONSOLE_LOG_HEIGHT)) < 0) {
 212         return -1;
 213     }
 214
 215     return 0;
 216 }
 217
 218 int console_update(Console *console, float delta_time)
 219 {
 220     trace_assert(console);
 221
 222     if (console->a < 1.0f) {
 223         console->a += 1.0f / SLIDE_DOWN_TIME * delta_time;
 224
 225         if (console->a > 1.0f) {
 226             console->a = 1.0f;
 227         }
 228     }
 229
 230     return 0;
 231 }
 232
 233 void console_slide_down(Console *console)
 234 {
 235     trace_assert(console);
 236     console->a = 0.0f;
 237 }