vg/vg_console.h

   1 // Copyright (C) 2021 Harry Godden (hgn) - All Rights Reserved
   2
   3 struct vg_console
   4 {
   5         struct vg_convar
   6         {
   7                 void *data;
   8                 const char *name;
   9
  10                 enum vg_convar_dtype
  11                 {
  12                         k_convar_dtype_i32,
  13                         k_convar_dtype_u32,
  14                         k_convar_dtype_f32
  15                 }
  16                 data_type;
  17
  18                 union
  19                 {
  20                         struct
  21                         {
  22                                 int min, max, clamp;
  23                         } opt_i32;
  24                 };
  25
  26                 int persistent; // Should be stored to cfg/auto.conf
  27         }
  28         *convars;
  29
  30         struct vg_cmd
  31         {
  32                 int (*function)( int argc, char const *argv[] );
  33                 const char *name;
  34         }
  35         *functions;
  36
  37         char lines[16][512];
  38         u32 current, len;
  39
  40         char input[512];
  41         int cursor_user, cursor_pos, string_length;
  42
  43         char history[32][512];
  44         int history_last, history_pos, history_count;
  45
  46         int enabled;
  47         int scale;
  48 }
  49 vg_console = { .scale = 2 };
  50
  51 // Declerations
  52 // ------------
  53
  54 // Registration
  55 static void vg_convar_push( struct vg_convar cv );
  56 static void vg_function_push( struct vg_cmd cmd );
  57
  58 static void vg_console_draw( void );
  59 void vg_console_println( const char *str );
  60 static int vg_console_list( int argc, char const *argv[] );
  61 static void vg_console_init(void);
  62 static void vg_console_write_persistent(void);
  63 static void vg_console_free(void);
  64 static void execute_console_input( const char *cmd );
  65
  66 // Console interface
  67 // -----------------
  68
  69 static void console_make_selection( int* start, int* end );
  70 static void console_move_cursor( int* cursor0, int* cursor1, int dir, int snap_together );
  71 static int console_makeroom( int datastart, int length );
  72 static int console_delete_char( int direction );
  73 static void console_to_clipboard(void);
  74 static void console_clipboard_paste(void);
  75 static void console_put_char( char c );
  76 static void console_history_get( char* buf, int entry_num );
  77 static void console_proc_key( GLFWwindow* ptrW, int key, int scancode, int action, int mods );
  78 static void console_proc_wchar( GLFWwindow* ptrW, u32 uWchar );
  79 static int vg_console_enabled(void);
  80
  81 // =========================================================================================================
  82 // Implementation
  83
  84 static int vg_console_enabled(void)
  85 {
  86         return vg_console.enabled;
  87 }
  88
  89 static void vg_convar_push( struct vg_convar cv )
  90 {
  91         arrpush( vg_console.convars, cv );
  92 }
  93
  94 static void vg_function_push( struct vg_cmd cmd )
  95 {
  96         arrpush( vg_console.functions, cmd );
  97 }
  98
  99 static void vg_console_draw( void )
 100 {
 101         if( !vg_console.enabled )
 102                 return;
 103
 104         int ptr = vg_console.current-1;
 105
 106    int const fh = 14;
 107
 108         ui_global_ctx.cursor[0] = 0;
 109         ui_global_ctx.cursor[1] = 0;
 110         ui_global_ctx.cursor[3] = vg_list_size( vg_console.lines )*fh*vg_console.scale;
 111         ui_fill_x( &ui_global_ctx );
 112
 113         ui_new_node( &ui_global_ctx );
 114         {
 115                 ui_fill_rect( &ui_global_ctx, ui_global_ctx.cursor, 0x77333333 );
 116
 117                 ui_global_ctx.cursor[3] = fh*vg_console.scale;
 118                 ui_align_bottom( &ui_global_ctx );
 119
 120                 for( int i = 0; i < vg_console.len; i ++ )
 121                 {
 122                         if( ptr < 0 )
 123                                 ptr = vg_list_size( vg_console.lines )-1;
 124
 125                         ui_text( &ui_global_ctx, vg_console.lines[ptr], vg_console.scale );
 126                         ui_global_ctx.cursor[1] -= fh*vg_console.scale;
 127
 128                         ptr --;
 129                 }
 130         }
 131         ui_end_down( &ui_global_ctx );
 132
 133         ui_global_ctx.cursor[1] += 2;
 134         ui_global_ctx.cursor[3] = fh*vg_console.scale;
 135
 136         ui_new_node( &ui_global_ctx );
 137         {
 138                 ui_fill_rect( &ui_global_ctx, ui_global_ctx.cursor, 0x77333333 );
 139
 140                 ui_text( &ui_global_ctx, vg_console.input, vg_console.scale );
 141
 142                 int start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user ),
 143                          end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 144
 145                 ui_global_ctx.cursor[0] = (start * ui_glyph_spacing_x * vg_console.scale);
 146                 ui_global_ctx.cursor[2] = (start == end? 0.5f: (float)(end-start)) * (float)ui_glyph_spacing_x * (float)vg_console.scale;
 147
 148                 ui_fill_rect( &ui_global_ctx, ui_global_ctx.cursor, 0x66ffffff );
 149         }
 150         ui_end_down( &ui_global_ctx );
 151 }
 152
 153 void vg_console_println( const char *str )
 154 {
 155         if( vg_console.len < vg_list_size( vg_console.lines ) )
 156                 vg_console.len ++;
 157
 158         strcpy( vg_console.lines[ vg_console.current ++ ], str );
 159
 160         if( vg_console.current >= vg_list_size( vg_console.lines ) )
 161                 vg_console.current = 0;
 162 }
 163
 164 static int vg_console_list( int argc, char const *argv[] )
 165 {
 166         for( int i = 0; i < arrlen( vg_console.functions ); i ++ )
 167         {
 168                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 169                 vg_info( "* %s\n", cmd->name );
 170         }
 171
 172         vg_info( "* snowsound\n" );
 173
 174         for( int i = 0; i < arrlen( vg_console.convars ); i ++ )
 175         {
 176                 struct vg_convar *cv = &vg_console.convars[ i ];
 177                 vg_info( "%s\n", cv->name );
 178         }
 179
 180         return 0;
 181 }
 182
 183 static int vg_console_chartest( int argc, char const *argv[] )
 184 {
 185    vg_info( "\"THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG\"\n" );
 186    vg_info( "'the quick brown fox jumps over the lazy dog'\n" );
 187    vg_info( ":;!@#$%^& 0123456789 +-*/=~ ()[]{}<>\n" );
 188    return 0;
 189 }
 190
 191 static void vg_console_init(void)
 192 {
 193         vg_log_callback = vg_console_println;
 194
 195         vg_convar_push( (struct vg_convar)
 196         { .name = "console_scale", .data = &vg_console.scale, .data_type = k_convar_dtype_i32,
 197                 .opt_i32 = { .clamp = 1, .min = 1, .max = 7 } } );
 198
 199         vg_function_push( (struct vg_cmd){
 200                 .name = "list",
 201                 .function = vg_console_list
 202         });
 203
 204    vg_function_push( (struct vg_cmd){
 205       .name = "chartest",
 206       .function = vg_console_chartest
 207    });
 208
 209         // Read and exec persistent commands
 210         FILE *fp = fopen( "cfg/auto.conf", "r" );
 211         if( fp )
 212         {
 213                 char line[256];
 214
 215                 while( fgets( line, sizeof( line ), fp ) )
 216                 {
 217                         line[ strcspn( line, "\r\n#" ) ] = 0x00;
 218
 219                         if( line[0] != 0x00 )
 220                         {
 221                                 execute_console_input( line );
 222                         }
 223                 }
 224
 225                 fclose( fp );
 226         }
 227 }
 228
 229 static void vg_console_write_persistent(void)
 230 {
 231         FILE *fp = fopen( "cfg/auto.conf", "w" );
 232
 233         for( int i = 0; i < arrlen( vg_console.convars ); i ++ )
 234         {
 235                 struct vg_convar *cv = &vg_console.convars[i];
 236
 237                 if( cv->persistent )
 238                 {
 239                         switch( cv->data_type )
 240                         {
 241                                 case k_convar_dtype_i32:
 242                                         fprintf( fp, "%s %d\n", cv->name, *(i32 *)(cv->data) );
 243                                 break;
 244                                 case k_convar_dtype_u32:
 245                                         fprintf( fp, "%s %u\n", cv->name, *(u32 *)(cv->data) );
 246                                 break;
 247                                 case k_convar_dtype_f32:
 248                                         fprintf( fp, "%s %.5f\n", cv->name, *(float *)(cv->data ) );
 249                                 break;
 250                         }
 251                 }
 252         }
 253
 254         fclose( fp );
 255 }
 256
 257 static void vg_console_free(void)
 258 {
 259         vg_console_write_persistent();
 260
 261         arrfree( vg_console.convars );
 262         arrfree( vg_console.functions );
 263 }
 264
 265 static void execute_console_input( const char *cmd )
 266 {
 267         char temp[512];
 268         char const *args[9];
 269         int arg_count = 0;
 270
 271         int in_token = 0;
 272
 273         // Split string into tokens
 274         for( int i = 0; i < vg_list_size( temp ); i ++ )
 275         {
 276                 if( cmd[i] )
 277                 {
 278                         if( isspace( cmd[i] ) )
 279                         {
 280                                 temp[i] = '\0';
 281                                 in_token = 0;
 282
 283                                 if( arg_count == vg_list_size( args ) )
 284                                         break;
 285                         }
 286                         else
 287                         {
 288                                 temp[i] = cmd[i];
 289
 290                                 if( !in_token )
 291                                 {
 292                                         args[ arg_count ++ ] = temp + i;
 293                                         in_token = 1;
 294                                 }
 295                         }
 296                 }
 297                 else
 298                 {
 299                         temp[i] = '\0';
 300                         break;
 301                 }
 302         }
 303
 304         if( arg_count == 0 )
 305                 return;
 306
 307         int data_int;
 308
 309         for( int i = 0; i < arrlen( vg_console.convars ); i ++ )
 310         {
 311                 struct vg_convar *cv = &vg_console.convars[ i ];
 312                 if( !strcmp( cv->name, args[0] ) )
 313                 {
 314                         // Cvar Matched, try get value
 315                         if( arg_count >= 2 )
 316                         {
 317                                 switch( cv->data_type )
 318                                 {
 319                                         case k_convar_dtype_u32:
 320                                         case k_convar_dtype_i32:
 321
 322                                                 data_int = atoi( args[1] );
 323                                                 *((int *)cv->data) = cv->opt_i32.clamp? VG_MIN( VG_MAX(data_int, cv->opt_i32.min), cv->opt_i32.max ): data_int;
 324
 325                                         break;
 326                                         case k_convar_dtype_f32: *((float *)cv->data) = atof( temp ); break;
 327                                 }
 328                         }
 329                         else
 330                         {
 331                                 switch( cv->data_type )
 332                                 {
 333                                         case k_convar_dtype_i32: vg_info( "= %d\n", *((int *)cv->data) ); break;
 334                                         case k_convar_dtype_u32: vg_info( "= %u\n", *((u32 *)cv->data) ); break;
 335                                         case k_convar_dtype_f32: vg_info( "= %.4f\n", *((float *)cv->data) ); break;
 336                                 }
 337                         }
 338
 339                         return;
 340                 }
 341         }
 342
 343         // Try commands
 344         for( int i = 0; i < arrlen( vg_console.functions ); i ++ )
 345         {
 346                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 347                 if( !strcmp( cmd->name, args[0] ) )
 348                 {
 349                         // Call function
 350                         cmd->function( arg_count-1, args+1 );
 351                         return;
 352                 }
 353         }
 354
 355         vg_error( "No command/variable named '%s'. Use 'list' to view all\n", args[0] );
 356 }
 357
 358 // =============================================================================================================================
 359 // Console interface
 360
 361 static void console_make_selection( int* start, int* end )
 362 {
 363         *start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user );
 364         *end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 365 }
 366
 367 static void console_move_cursor( int* cursor0, int* cursor1, int dir, int snap_together )
 368 {
 369         *cursor0 = VG_MAX( 0, vg_console.cursor_user + dir );
 370         *cursor0 = VG_MIN( VG_MIN( vg_list_size( vg_console.input ), strlen( vg_console.input )), *cursor0 );
 371         if( snap_together )
 372                 *cursor1 = *cursor0;
 373 }
 374
 375 static int console_makeroom( int datastart, int length )
 376 {
 377         int move_to = VG_MIN( datastart+length, vg_list_size( vg_console.input ) );
 378         int move_amount = strlen( vg_console.input )-datastart;
 379         int move_end = VG_MIN( move_to+move_amount, vg_list_size( vg_console.input ) );
 380         move_amount = move_end-move_to;
 381
 382         if( move_amount )
 383                 memmove( &vg_console.input[ move_to ], &vg_console.input[ datastart ], move_end-move_to );
 384
 385         vg_console.input[ move_end ] = '\0';
 386
 387         return VG_MIN( length, vg_list_size( vg_console.input )-datastart );
 388 }
 389
 390 static int console_delete_char( int direction )
 391 {
 392         int start, end;
 393         console_make_selection( &start, &end );
 394
 395         // There is no selection
 396         if( !(end-start) )
 397         {
 398                 if( direction == 1 ) end = VG_MIN( end+1, strlen( vg_console.input ) );
 399                 else if( direction == -1 ) start = VG_MAX( start-1, 0 );
 400         }
 401
 402         // Still no selction, no need to do anything
 403         if( !(end-start) )
 404                 return start;
 405
 406         // Copy the end->terminator to start
 407         int remaining_length = strlen( vg_console.input )+1-end;
 408         memmove( &vg_console.input[ start ], &vg_console.input[ end ], remaining_length );
 409         return start;
 410 }
 411
 412 static void console_to_clipboard(void)
 413 {
 414         int start, end;
 415         console_make_selection( &start, &end );
 416         char buffer[512];
 417
 418         if( end-start )
 419         {
 420                 memcpy( buffer, &vg_console.input[ start ], end-start );
 421                 buffer[ end-start ] = 0x00;
 422                 glfwSetClipboardString( NULL, buffer );
 423         }
 424 }
 425
 426 static void console_clipboard_paste(void)
 427 {
 428         int datastart = console_delete_char(0);
 429         const char* clipboard = glfwGetClipboardString(NULL);
 430         int length = strlen(clipboard);
 431
 432         int cpylength = console_makeroom(datastart, length);
 433
 434         memcpy( vg_console.input + datastart, clipboard, cpylength);
 435
 436         console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, cpylength, 1 );
 437 }
 438
 439 static void console_put_char( char c )
 440 {
 441         if( !vg_console.enabled )
 442                 return;
 443
 444         vg_console.cursor_user = console_delete_char(0);
 445
 446         if( console_makeroom( vg_console.cursor_user, 1 ) )
 447                 vg_console.input[ vg_console.cursor_user ] = c;
 448
 449         console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, 1, 1 );
 450 }
 451
 452 static void console_history_get( char* buf, int entry_num )
 453 {
 454         if( !vg_console.history_count )
 455                 return;
 456
 457         int pick = (vg_console.history_last - VG_MIN( entry_num, vg_console.history_count -1 )) % vg_list_size( vg_console.history );
 458         strcpy( buf, vg_console.history[ pick ] );
 459 }
 460
 461 static void console_proc_key( GLFWwindow* ptrW, int key, int scancode, int action, int mods )
 462 {
 463         if( action )
 464         {
 465                 int cursor_diff = vg_console.cursor_pos - vg_console.cursor_user? 0: 1;
 466
 467                 if( key == GLFW_KEY_GRAVE_ACCENT )
 468                 {
 469                         vg_console.enabled = !vg_console.enabled;
 470                         return;
 471                 }
 472
 473                 if( !vg_console.enabled )
 474                         return;
 475
 476                 if( key == GLFW_KEY_LEFT )
 477                 {
 478                         if( mods & GLFW_MOD_SHIFT ) // Receed secondary cursor
 479                         {
 480                                 console_move_cursor( &vg_console.cursor_user, NULL, -1, 0 );
 481                         }
 482                         else // Match and receed both cursors
 483                         {
 484                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, -cursor_diff, 1 );
 485                         }
 486                 }
 487                 else if( key == GLFW_KEY_RIGHT ) // Advance secondary cursor
 488                 {
 489                         if( mods & GLFW_MOD_SHIFT )
 490                         {
 491                                 console_move_cursor( &vg_console.cursor_user, NULL, 1, 0 );
 492                         }
 493                         else // Match and advance both cursors
 494                         {
 495                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, +cursor_diff, 1 );
 496                         }
 497                 }
 498                 else if( key == GLFW_KEY_DOWN )
 499                 {
 500                         if( mods & GLFW_MOD_SHIFT ){}
 501                         else
 502                         {
 503                                 vg_console.history_pos = VG_MAX( 0, vg_console.history_pos-1 );
 504                                 console_history_get( vg_console.input, vg_console.history_pos );
 505                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, vg_list_size( vg_console.input ), 1 );
 506                         }
 507                 }
 508                 else if( key == GLFW_KEY_UP )
 509                 {
 510                         if( mods & GLFW_MOD_SHIFT ){}
 511                         else
 512                         {
 513                                 vg_console.history_pos = VG_MAX
 514                                 (
 515                                         0,
 516                                         VG_MIN
 517                                         (
 518                                                 vg_console.history_pos+1,
 519                                                 VG_MIN
 520                                                 (
 521                                                         vg_list_size( vg_console.history ),
 522                                                         vg_console.history_count - 1
 523                                                 )
 524                                         )
 525                                 );
 526
 527                                 console_history_get( vg_console.input, vg_console.history_pos );
 528                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, vg_list_size( vg_console.input ), 1);
 529                         }
 530                 }
 531                 else if( key == GLFW_KEY_BACKSPACE ) // Lookback delete
 532                 {
 533                         vg_console.cursor_user = console_delete_char( -1 );
 534                         vg_console.cursor_pos = vg_console.cursor_user;
 535                 }
 536                 else if( key == GLFW_KEY_DELETE ) // Lookforward delete
 537                 {
 538                         vg_console.cursor_user = console_delete_char( 1 );
 539                         vg_console.cursor_pos = vg_console.cursor_user;
 540                 }
 541                 else if( key == GLFW_KEY_HOME ) // Home key
 542                 {
 543                         if( mods & GLFW_MOD_SHIFT )
 544                                 console_move_cursor( &vg_console.cursor_user, NULL, -10000, 0 );
 545                         else
 546                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, -10000, 1 );
 547                 }
 548                 else if( key == GLFW_KEY_END ) // End key
 549                 {
 550                         if( mods & GLFW_MOD_SHIFT )
 551                                 console_move_cursor( &vg_console.cursor_user, NULL, 10000, 0 );
 552                         else
 553                                 console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, vg_list_size( vg_console.input ), 1 );
 554                 }
 555                 else if( key == GLFW_KEY_A )
 556                 {
 557                         if( mods & GLFW_MOD_CONTROL ) // Select all
 558                         {
 559                                 console_move_cursor( &vg_console.cursor_user, NULL, 10000, 0);
 560                                 console_move_cursor( &vg_console.cursor_pos, NULL, -10000, 0);
 561                         }
 562                 }
 563                 else if( key == GLFW_KEY_C ) // Copy
 564                 {
 565                         if( mods & GLFW_MOD_CONTROL )
 566                         {
 567                                 console_to_clipboard();
 568                         }
 569                 }
 570                 else if( key == GLFW_KEY_X ) // Cut
 571                 {
 572                         if( mods & GLFW_MOD_CONTROL )
 573                         {
 574                                 console_to_clipboard();
 575                                 vg_console.cursor_user = console_delete_char(0);
 576                                 vg_console.cursor_pos = vg_console.cursor_user;
 577                         }
 578                 }
 579                 else if( key == GLFW_KEY_V ) // Paste
 580                 {
 581                         if( mods & GLFW_MOD_CONTROL )
 582                         {
 583                                 console_clipboard_paste();
 584                         }
 585                 }
 586                 else if( key == GLFW_KEY_ENTER )
 587                 {
 588                         if( !strlen( vg_console.input ) )
 589                                 return;
 590
 591                         vg_info( "%s\n", vg_console.input );
 592
 593                         if( strcmp( vg_console.input, vg_console.history[ vg_console.history_last ]) )
 594                         {
 595                                 vg_console.history_last = ( vg_console.history_last + 1) % vg_list_size(vg_console.history );
 596                                 vg_console.history_count = VG_MIN( vg_list_size( vg_console.history ), vg_console.history_count + 1 );
 597                                 strcpy( vg_console.history[ vg_console.history_last ], vg_console.input );
 598                         }
 599
 600                         vg_console.history_pos = -1;
 601                         execute_console_input( vg_console.input );
 602                         console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, -10000, 1 );
 603                         vg_console.input[0] = '\0';
 604                 }
 605         }
 606 }
 607
 608 // Handle an OS based input of UTF32 character from the keyboard or such
 609 static void console_proc_wchar( GLFWwindow* ptrW, u32 uWchar )
 610 {
 611         //LOG_INFO("Recieved wchar: %u\n", uWchar);
 612         if( uWchar <= 0x7F && (char)uWchar != 0x60)
 613         {
 614                 console_put_char((char)uWchar);
 615         }
 616 }