vg_console.h

   1 /* Copyright (C) 2021-2023 Harry Godden (hgn) - All Rights Reserved */
   2
   3 #ifndef VG_CONSOLE_H
   4 #define VG_CONSOLE_H
   5
   6 #ifndef VG_GAME
   7   #define VG_GAME
   8 #endif
   9
  10 #include "vg/vg_ui.h"
  11 #include "vg/vg_log.h"
  12
  13 #define VG_VAR_F32( NAME, ... ) \
  14    { u32 flags=0x00; __VA_ARGS__ ;\
  15    vg_console_reg_var( #NAME, &NAME, k_var_dtype_f32, flags ); }
  16
  17 #define VG_VAR_I32( NAME, ... ) \
  18    { u32 flags=0x00; __VA_ARGS__ ;\
  19    vg_console_reg_var( #NAME, &NAME, k_var_dtype_i32, flags ); }
  20
  21 #define VG_VAR_PERSISTENT 0x1
  22 #define VG_VAR_CHEAT      0x2
  23
  24 typedef struct vg_var vg_var;
  25 typedef struct vg_cmd vg_cmd;
  26
  27 struct vg_console{
  28         struct vg_var{
  29                 void *data;
  30                 const char *name;
  31
  32                 enum vg_var_dtype{
  33                         k_var_dtype_i32,
  34                         k_var_dtype_u32,
  35                         k_var_dtype_f32
  36                 }
  37                 data_type;
  38
  39       u32 flags;
  40         }
  41         vars[ 128 ];
  42
  43         struct vg_cmd{
  44                 int  (*function)( int argc, char const *argv[] );
  45       void (*poll_suggest)( int argc, char const *argv[] );
  46                 const char *name;
  47         }
  48         functions[ 32 ];
  49
  50    struct {
  51       const char *str;
  52       int len;
  53
  54       u32 lev_score;
  55    }
  56    suggestions[12];
  57    u32 suggestion_count;
  58    int suggestion_select,
  59        suggestion_pastepos,
  60        suggestion_maxlen;
  61
  62    u32 var_count, function_count;
  63
  64         char input[96],
  65         input_copy[96];
  66         int cursor_user, cursor_pos, string_length;
  67
  68         char history[32][96];
  69         int history_last, history_pos, history_count;
  70
  71         int enabled;
  72 }
  73 vg_console;
  74
  75
  76 VG_STATIC void _vg_console_draw( void );
  77 void           _vg_console_println( const char *str );
  78 VG_STATIC int  _vg_console_list( int argc, char const *argv[] );
  79 VG_STATIC void _vg_console_init(void);
  80 VG_STATIC void _vg_console_write_persistent(void);
  81 VG_STATIC void _vg_console_free(void);
  82 VG_STATIC void  vg_execute_console_input( const char *cmd );
  83
  84 /*
  85  * Console interface
  86  */
  87 VG_STATIC void console_make_selection( int* start, int* end );
  88 VG_STATIC void console_move_cursor( int* cursor0, int* cursor1,
  89                                     int dir, int snap_together );
  90 VG_STATIC int console_makeroom( int datastart, int length );
  91 VG_STATIC int console_delete_char( int direction );
  92 VG_STATIC void console_to_clipboard(void);
  93 VG_STATIC void console_clipboard_paste(void);
  94 VG_STATIC void console_put_char( char c );
  95 VG_STATIC void console_history_get( char* buf, int entry_num );
  96 VG_STATIC int _vg_console_enabled(void);
  97 VG_STATIC void console_proc_key( SDL_Keysym ev );
  98
  99 /*
 100  * Implementation
 101  */
 102 VG_STATIC int _vg_console_enabled(void)
 103 {
 104         return vg_console.enabled;
 105 }
 106
 107 VG_STATIC
 108 void vg_console_reg_var( const char *alias, void *ptr, enum vg_var_dtype type,
 109                          u32 flags )
 110 {
 111    if( vg_console.var_count > vg_list_size(vg_console.vars) )
 112       vg_fatal_error( "Too many vars registered" );
 113
 114    vg_var *var = &vg_console.vars[ vg_console.var_count ++ ];
 115    var->name = alias;
 116    var->data = ptr;
 117    var->data_type = type;
 118    var->flags = flags;
 119
 120    vg_info( "Console variable '%s' registered\n", alias );
 121 }
 122
 123 VG_STATIC
 124 void vg_console_reg_cmd( const char *alias,
 125                          int (*function)(int argc, const char *argv[]),
 126                          void (*poll_suggest)(int argc, const char *argv[]) )
 127 {
 128    if( vg_console.function_count > vg_list_size(vg_console.functions) )
 129       vg_fatal_error( "Too many functions registered" );
 130
 131    vg_cmd *cmd = &vg_console.functions[ vg_console.function_count ++ ];
 132
 133    cmd->function = function;
 134    cmd->poll_suggest = poll_suggest;
 135    cmd->name = alias;
 136
 137    vg_info( "Console function '%s' registered\n", alias );
 138 }
 139
 140 VG_STATIC void _vg_console_draw(void)
 141 {
 142         if( !vg_console.enabled )
 143                 return;
 144
 145    SDL_AtomicLock( &log_print_sl );
 146
 147         int ptr = vg_log.buffer_line_current;
 148    int const fh = 14,
 149              log_lines = 32;
 150    int console_lines = VG_MIN( log_lines, vg_log.buffer_line_count );
 151
 152         vg_uictx.cursor[0] = 0;
 153         vg_uictx.cursor[1] = 0;
 154         vg_uictx.cursor[3] = log_lines*fh;
 155         ui_fill_x();
 156
 157    /*
 158     * log
 159     */
 160         ui_new_node();
 161         {
 162                 ui_fill_rect( vg_uictx.cursor, 0x77181818 );
 163
 164                 vg_uictx.cursor[3] = fh;
 165                 ui_align_bottom();
 166
 167                 for( int i=0; i<console_lines; i ++ ){
 168                         ptr --;
 169
 170                         if( ptr < 0 )
 171                                 ptr = vg_list_size( vg_log.buffer )-1;
 172
 173                         ui_text( vg_uictx.cursor, vg_log.buffer[ptr], 1, 0 );
 174                         vg_uictx.cursor[1] -= fh;
 175                 }
 176
 177         }
 178         ui_end_down();
 179
 180
 181    /* Input area */
 182         vg_uictx.cursor[1] += 2;
 183         vg_uictx.cursor[3] = fh;
 184
 185         ui_new_node();
 186         {
 187                 ui_fill_rect( vg_uictx.cursor, 0x77111111 );
 188                 ui_text( vg_uictx.cursor, vg_console.input, 1, 0 );
 189
 190                 int start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user ),
 191                          end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 192
 193                 vg_uictx.cursor[0] = start * UI_GLYPH_SPACING_X;
 194                 vg_uictx.cursor[2] = (start == end? 0.5f: (float)(end-start))
 195                                              * (float)UI_GLYPH_SPACING_X;
 196
 197                 ui_fill_rect( vg_uictx.cursor, 0x66ffffff );
 198         }
 199         ui_end_down();
 200
 201
 202    /* suggestions */
 203    if( vg_console.suggestion_count ){
 204       vg_uictx.cursor[0] += UI_GLYPH_SPACING_X * vg_console.suggestion_pastepos;
 205       vg_uictx.cursor[1] += 2;
 206       vg_uictx.cursor[3] = vg_console.suggestion_count * fh;
 207       vg_uictx.cursor[2] = UI_GLYPH_SPACING_X * vg_console.suggestion_maxlen;
 208
 209       ui_new_node();
 210       {
 211          ui_fill_rect( vg_uictx.cursor, 0x77040404 );
 212
 213          vg_uictx.cursor[3] = fh;
 214          for( int i=0; i<vg_console.suggestion_count; i ++ ){
 215             if( i == vg_console.suggestion_select )
 216                ui_fill_rect( vg_uictx.cursor, 0x66a0e508 );
 217
 218             ui_text( vg_uictx.cursor, vg_console.suggestions[i].str, 1, 0 );
 219             vg_uictx.cursor[1] += fh;
 220          }
 221       }
 222       ui_end_down();
 223    }
 224
 225    SDL_AtomicUnlock( &log_print_sl );
 226 }
 227
 228 VG_STATIC int _vg_console_list( int argc, char const *argv[] )
 229 {
 230         for( int i=0; i<vg_console.function_count; i ++ ){
 231                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 232                 vg_info( "* %s\n", cmd->name );
 233         }
 234
 235         for( int i=0; i<vg_console.var_count; i ++ ){
 236                 struct vg_var *cv = &vg_console.vars[ i ];
 237                 vg_info( "%s\n", cv->name );
 238         }
 239
 240         return 0;
 241 }
 242
 243 int _test_break( int argc, const char *argv[] )
 244 {
 245    vg_fatal_error( "Test crash from main, after loading (console)" );
 246    return 0;
 247 }
 248
 249 int _vg_console_exec( int argc, const char *argv[] )
 250 {
 251    if( argc < 1 ) return 0;
 252
 253    char path[256];
 254    strcpy( path, "cfg/" );
 255    strncat( path, argv[0], 250 );
 256
 257         FILE *fp = fopen( path, "r" );
 258         if( fp ){
 259                 char line[256];
 260
 261                 while( fgets( line, sizeof( line ), fp ) ){
 262                         line[ strcspn( line, "\r\n#" ) ] = 0x00;
 263
 264                         if( line[0] != 0x00 ){
 265                                 vg_execute_console_input( line );
 266                         }
 267                 }
 268
 269                 fclose( fp );
 270         }
 271    else{
 272       vg_error( "Could not open '%s'\n", path );
 273    }
 274
 275    return 0;
 276 }
 277
 278 VG_STATIC void _vg_console_init(void)
 279 {
 280    vg_console_reg_cmd( "list", _vg_console_list, NULL );
 281    vg_console_reg_cmd( "crash", _test_break, NULL );
 282    vg_console_reg_cmd( "exec", _vg_console_exec, NULL );
 283 }
 284
 285 VG_STATIC void vg_console_load_autos(void)
 286 {
 287    _vg_console_exec( 1, (const char *[]){ "auto.conf" } );
 288 }
 289
 290 VG_STATIC void _vg_console_write_persistent(void)
 291 {
 292         FILE *fp = fopen( "cfg/auto.conf", "w" );
 293
 294         for( int i=0; i<vg_console.var_count; i ++ ){
 295                 struct vg_var *cv = &vg_console.vars[i];
 296
 297                 if( cv->flags & VG_VAR_PERSISTENT ){
 298                         switch( cv->data_type ){
 299                                 case k_var_dtype_i32:
 300                                         fprintf( fp, "%s %d\n", cv->name, *(i32 *)(cv->data) );
 301                                 break;
 302                                 case k_var_dtype_u32:
 303                                         fprintf( fp, "%s %u\n", cv->name, *(u32 *)(cv->data) );
 304                                 break;
 305                                 case k_var_dtype_f32:
 306                                         fprintf( fp, "%s %.5f\n", cv->name, *(float *)(cv->data ) );
 307                                 break;
 308                         }
 309                 }
 310         }
 311
 312         fclose( fp );
 313 }
 314
 315 VG_STATIC void _vg_console_free(void)
 316 {
 317         _vg_console_write_persistent();
 318 }
 319
 320 /*
 321  * splits src into tokens and fills out args as pointers to those tokens
 322  * returns number of tokens
 323  * dst must be as long as src
 324  */
 325 VG_STATIC int vg_console_tokenize( const char *src, char *dst,
 326                                    const char *args[8] )
 327 {
 328         int arg_count = 0,
 329        in_token = 0;
 330
 331         for( int i=0;; i ++ ){
 332                 if( src[i] ){
 333                         if( src[i] == ' ' || src[i] == '\t' ){
 334             if( in_token )
 335                dst[i] = '\0';
 336
 337                                 in_token = 0;
 338
 339                                 if( arg_count == 8 )
 340                                         break;
 341                         }
 342                         else{
 343                                 dst[i] = src[i];
 344
 345                                 if( !in_token ){
 346                                         args[ arg_count ++ ] = &dst[i];
 347                                         in_token = 1;
 348                                 }
 349                         }
 350                 }
 351                 else{
 352                         dst[i] = '\0';
 353                         break;
 354                 }
 355         }
 356
 357    return arg_count;
 358 }
 359
 360 VG_STATIC vg_var *vg_console_match_var( const char *kw )
 361 {
 362         for( int i=0; i<vg_console.var_count; i ++ ){
 363                 struct vg_var *cv = &vg_console.vars[ i ];
 364                 if( !strcmp( cv->name, kw ) ){
 365          return cv;
 366       }
 367    }
 368
 369    return NULL;
 370 }
 371
 372 VG_STATIC vg_cmd *vg_console_match_cmd( const char *kw )
 373 {
 374         for( int i=0; i<vg_console.function_count; i ++ ){
 375                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 376                 if( !strcmp( cmd->name, kw ) ){
 377          return cmd;
 378       }
 379    }
 380
 381    return NULL;
 382 }
 383
 384 VG_STATIC void vg_execute_console_input( const char *cmd )
 385 {
 386         char temp[512];
 387         char const *args[8];
 388         int arg_count = vg_console_tokenize( cmd, temp, args );
 389
 390         if( arg_count == 0 )
 391                 return;
 392
 393    vg_var *cv = vg_console_match_var( args[0] );
 394    vg_cmd *fn = vg_console_match_cmd( args[0] );
 395
 396    assert( !(cv && fn) );
 397
 398    if( cv ){
 399       /* Cvar Matched, try get value */
 400       if( arg_count >= 2 ){
 401          if( (cv->data_type == k_var_dtype_u32) ||
 402              (cv->data_type == k_var_dtype_i32) )
 403          {
 404             int *ptr = cv->data;
 405             *ptr = atoi( args[1] );
 406          }
 407          else if( cv->data_type == k_var_dtype_f32 ){
 408             float *ptr = cv->data;
 409             *ptr = atof( args[1] );
 410          }
 411       }
 412       else{
 413          if( cv->data_type == k_var_dtype_i32 )
 414             vg_info( "= %d\n", *((int *)cv->data) );
 415          else if( cv->data_type == k_var_dtype_u32 )
 416             vg_info( "= %u\n", *((u32 *)cv->data) );
 417          else if( cv->data_type == k_var_dtype_f32 )
 418             vg_info( "= %.4f\n", *((float *)cv->data) );
 419       }
 420
 421       return;
 422         }
 423    else if( fn ){
 424       fn->function( arg_count-1, args+1 );
 425       return;
 426    }
 427
 428         vg_error( "No command/var named '%s'. Use 'list' to view all\n", args[0] );
 429 }
 430
 431 u32 str_lev_distance( const char *s1, const char *s2 )
 432 {
 433    u32 m = strlen( s1 ),
 434        n = strlen( s2 );
 435
 436    if( m==0 ) return n;
 437    if( n==0 ) return m;
 438
 439    assert( n+1 <= 256 );
 440
 441    u32 costs[ 256 ];
 442
 443    for( u32 k=0; k<=n; k++ )
 444       costs[k] = k;
 445
 446    u32 i = 0;
 447    for( u32 i=0; i<m; i++ ){
 448       costs[0] = i+1;
 449
 450       u32 corner = i;
 451
 452       for( u32 j=0; j<n; j++ ){
 453          u32 upper = costs[j+1];
 454
 455          if( s1[i] == s2[j] )
 456             costs[ j+1 ] = corner;
 457          else{
 458             u32 t = (upper < corner)? upper: corner;
 459             costs[j+1] = ((costs[j] < t)? costs[j]: t) + 1;
 460          }
 461
 462          corner = upper;
 463       }
 464    }
 465
 466    return costs[n];
 467 }
 468
 469 u32 str_lcs( const char *s1, const char *s2 )
 470 {
 471    u32 m = VG_MIN( 31, strlen( s1 ) ),
 472        n = VG_MIN( 31, strlen( s2 ) );
 473
 474    int suff[32][32],
 475        result = 0;
 476
 477    for( int i=0; i<=m; i++ ){
 478       for( int j=0; j<=n; j++ ){
 479          if( i == 0 || j == 0 )
 480             suff[i][j] = 0;
 481          else if( s1[i-1] == s2[j-1] ){
 482             suff[i][j] = suff[i-1][j-1] + 1;
 483             result = VG_MAX( result, suff[i][j] );
 484          }
 485          else
 486             suff[i][j] = 0;
 487       }
 488    }
 489
 490    return result;
 491 }
 492
 493 /* str must not fuckoff ever! */
 494 VG_STATIC void console_suggest_score_text( const char *str, const char *input,
 495                                            int minscore )
 496 {
 497    /* filter duplicates */
 498    for( int i=0; i<vg_console.suggestion_count; i++ )
 499       if( !strcmp( vg_console.suggestions[i].str, str ) )
 500          return;
 501
 502    /* calc score */
 503    u32 score = str_lcs( str, input );
 504
 505    if( score < minscore )
 506       return;
 507
 508    int best_pos = vg_console.suggestion_count;
 509    for( int j=best_pos-1; j>=0; j -- )
 510       if( score > vg_console.suggestions[j].lev_score )
 511          best_pos = j;
 512
 513    /* insert if good score */
 514    if( best_pos < vg_list_size( vg_console.suggestions ) ){
 515       int start = VG_MIN( vg_console.suggestion_count,
 516                           vg_list_size( vg_console.suggestions )-1 );
 517       for( int j=start; j>best_pos; j -- )
 518          vg_console.suggestions[j] = vg_console.suggestions[j-1];
 519
 520       vg_console.suggestions[ best_pos ].str = str;
 521       vg_console.suggestions[ best_pos ].len = strlen( str );
 522       vg_console.suggestions[ best_pos ].lev_score = score;
 523
 524       if( vg_console.suggestion_count <
 525             vg_list_size( vg_console.suggestions ) )
 526          vg_console.suggestion_count ++;
 527    }
 528 }
 529
 530 VG_STATIC void console_update_suggestions(void)
 531 {
 532    vg_console.suggestion_count = 0;
 533    vg_console.suggestion_select = -1;
 534    vg_console.suggestion_maxlen = 0;
 535
 536    /*
 537     * - must be typing something
 538     * - must be at the end
 539     * - prev char must not be a whitespace
 540     * - cursors should match
 541     */
 542
 543    if( vg_console.cursor_pos == 0 )
 544       return;
 545
 546    if( vg_console.cursor_pos != vg_console.cursor_user )
 547       return;
 548
 549    if( vg_console.input[ vg_console.cursor_pos ] != '\0' )
 550       return;
 551
 552    if(  (vg_console.input[ vg_console.cursor_pos -1 ] == ' ') ||
 553         (vg_console.input[ vg_console.cursor_pos -1 ] == '\t') )
 554       return;
 555
 556    char temp[128];
 557    const char *args[8];
 558
 559    int token_count = vg_console_tokenize( vg_console.input, temp, args );
 560
 561    vg_console.suggestion_pastepos = args[token_count-1]-temp;
 562
 563    /* Score all our commands and cvars */
 564    if( token_count == 1 ){
 565       for( int i=0; i<vg_console.var_count; i++ ){
 566          vg_var *cvar = &vg_console.vars[i];
 567          console_suggest_score_text( cvar->name, args[0], 1 );
 568       }
 569
 570       for( int i=0; i<vg_console.function_count; i++ ){
 571          vg_cmd *cmd = &vg_console.functions[i];
 572          console_suggest_score_text( cmd->name, args[0], 1 );
 573       }
 574    }
 575    else{
 576       vg_cmd *cmd = vg_console_match_cmd( args[0] );
 577       vg_var *var = vg_console_match_var( args[0] );
 578
 579       assert( !( cmd && var ) );
 580
 581       if( cmd )
 582          if( cmd->poll_suggest )
 583             cmd->poll_suggest( token_count-1, &args[1] );
 584    }
 585
 586    /* some post processing */
 587    for( int i=0; i<vg_console.suggestion_count; i++ ){
 588       vg_console.suggestion_maxlen = VG_MAX( vg_console.suggestion_maxlen,
 589                                              vg_console.suggestions[i].len );
 590
 591       if( vg_console.suggestions[i].lev_score <
 592           vg_console.suggestions[0].lev_score/2 )
 593       {
 594          vg_console.suggestion_count = i;
 595          return;
 596       }
 597    }
 598 }
 599
 600 /*
 601  * Console Interface
 602  */
 603 VG_STATIC void console_make_selection( int* start, int* end )
 604 {
 605         *start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user );
 606         *end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 607 }
 608
 609 VG_STATIC void console_move_cursor( int* cursor0, int* cursor1,
 610                                     int dir, int snap_together )
 611 {
 612         *cursor0 = VG_MAX( 0, vg_console.cursor_user + dir );
 613         *cursor0 =
 614       VG_MIN(
 615          VG_MIN( vg_list_size(vg_console.input)-1, strlen( vg_console.input )),
 616       *cursor0 );
 617
 618         if( snap_together )
 619                 *cursor1 = *cursor0;
 620 }
 621
 622 VG_STATIC int console_makeroom( int datastart, int length )
 623 {
 624         int move_to = VG_MIN( datastart+length, vg_list_size( vg_console.input )-1 );
 625         int move_amount = strlen( vg_console.input )-datastart;
 626         int move_end =
 627       VG_MIN( move_to+move_amount, vg_list_size( vg_console.input )-1 );
 628         move_amount = move_end-move_to;
 629
 630         if( move_amount )
 631                 memmove( &vg_console.input[ move_to ],
 632                &vg_console.input[ datastart ],
 633                move_end-move_to );
 634
 635         vg_console.input[ move_end ] = '\0';
 636
 637         return VG_MIN( length, vg_list_size( vg_console.input )-datastart-1 );
 638 }
 639
 640 VG_STATIC int console_delete_char( int direction )
 641 {
 642         int start, end;
 643         console_make_selection( &start, &end );
 644
 645         /* There is no selection */
 646         if( !(end-start) ){
 647                 if( direction == 1 ) end = VG_MIN( end+1, strlen( vg_console.input ) );
 648                 else if( direction == -1 ) start = VG_MAX( start-1, 0 );
 649         }
 650
 651         /* Still no selction, no need to do anything */
 652         if( !(end-start) )
 653                 return start;
 654
 655         /* Copy the end->terminator to start */
 656         int remaining_length = strlen( vg_console.input )+1-end;
 657         memmove( &vg_console.input[ start ],
 658             &vg_console.input[ end ],
 659             remaining_length );
 660         return start;
 661 }
 662
 663 VG_STATIC void console_to_clipboard(void)
 664 {
 665         int start, end;
 666         console_make_selection( &start, &end );
 667         char buffer[512];
 668
 669         if( end-start ){
 670                 memcpy( buffer, &vg_console.input[ start ], end-start );
 671                 buffer[ end-start ] = 0x00;
 672       SDL_SetClipboardText( buffer );
 673         }
 674 }
 675
 676 VG_STATIC void console_clipboard_paste(void)
 677 {
 678    if( !SDL_HasClipboardText() )
 679       return;
 680
 681    char *text = SDL_GetClipboardText();
 682
 683    if( !text )
 684       return;
 685
 686    int datastart = console_delete_char( 0 );
 687         int length = strlen( text );
 688         int cpylength = console_makeroom( datastart, length );
 689
 690         memcpy( vg_console.input + datastart, text, cpylength);
 691         console_move_cursor( &vg_console.cursor_user,
 692                         &vg_console.cursor_pos, cpylength, 1 );
 693    SDL_free( text );
 694
 695    console_update_suggestions();
 696 }
 697
 698 VG_STATIC void console_put_char( char c )
 699 {
 700         if( !vg_console.enabled )
 701                 return;
 702
 703         vg_console.cursor_user = console_delete_char(0);
 704
 705         if( console_makeroom( vg_console.cursor_user, 1 ) )
 706                 vg_console.input[ vg_console.cursor_user ] = c;
 707
 708         console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, 1, 1 );
 709 }
 710
 711 VG_STATIC void console_history_get( char* buf, int entry_num )
 712 {
 713         if( !vg_console.history_count )
 714                 return;
 715
 716    int offset = VG_MIN( entry_num, vg_console.history_count -1 ),
 717        pick = (vg_console.history_last - offset) %
 718                vg_list_size( vg_console.history );
 719         strcpy( buf, vg_console.history[ pick ] );
 720 }
 721
 722 /* Receed secondary cursor */
 723 VG_STATIC void _console_left_select(void)
 724 {
 725    console_move_cursor( &vg_console.cursor_user, NULL, -1, 0 );
 726 }
 727
 728 /* Match and receed both cursors */
 729 VG_STATIC void _console_left(void)
 730 {
 731    int cursor_diff = vg_console.cursor_pos - vg_console.cursor_user? 0: 1;
 732
 733    console_move_cursor( &vg_console.cursor_user,
 734                         &vg_console.cursor_pos, -cursor_diff, 1 );
 735 }
 736
 737 VG_STATIC void _console_right_select(void)
 738 {
 739    console_move_cursor( &vg_console.cursor_user, NULL, 1, 0 );
 740 }
 741
 742 VG_STATIC void _console_right(void)
 743 {
 744    int cursor_diff = vg_console.cursor_pos - vg_console.cursor_user? 0: 1;
 745
 746    console_move_cursor( &vg_console.cursor_user,
 747                         &vg_console.cursor_pos, +cursor_diff, 1 );
 748 }
 749
 750 VG_STATIC void _console_down(void)
 751 {
 752    vg_console.history_pos = VG_MAX( 0, vg_console.history_pos-1 );
 753    console_history_get( vg_console.input, vg_console.history_pos );
 754
 755    console_move_cursor( &vg_console.cursor_user,
 756                         &vg_console.cursor_pos,
 757                         vg_list_size(vg_console.input)-1, 1 );
 758 }
 759
 760 VG_STATIC void _console_up(void)
 761 {
 762    vg_console.history_pos = VG_MAX
 763    (
 764       0,
 765       VG_MIN
 766       (
 767          vg_console.history_pos+1,
 768          VG_MIN
 769          (
 770             vg_list_size( vg_console.history ),
 771             vg_console.history_count - 1
 772          )
 773       )
 774    );
 775
 776    console_history_get( vg_console.input, vg_console.history_pos );
 777    console_move_cursor( &vg_console.cursor_user,
 778                         &vg_console.cursor_pos,
 779                         vg_list_size(vg_console.input)-1, 1);
 780 }
 781
 782 VG_STATIC void _console_backspace(void)
 783 {
 784    vg_console.cursor_user = console_delete_char( -1 );
 785    vg_console.cursor_pos = vg_console.cursor_user;
 786
 787    console_update_suggestions();
 788 }
 789
 790 VG_STATIC void _console_delete(void)
 791 {
 792    vg_console.cursor_user = console_delete_char( 1 );
 793    vg_console.cursor_pos = vg_console.cursor_user;
 794
 795    console_update_suggestions();
 796 }
 797
 798 VG_STATIC void _console_home_select(void)
 799 {
 800    console_move_cursor( &vg_console.cursor_user, NULL, -10000, 0 );
 801 }
 802
 803 VG_STATIC void _console_home(void)
 804 {
 805    console_move_cursor( &vg_console.cursor_user,
 806                         &vg_console.cursor_pos, -10000, 1 );
 807 }
 808
 809 VG_STATIC void _console_end_select(void)
 810 {
 811    console_move_cursor( &vg_console.cursor_user, NULL, 10000, 0 );
 812 }
 813
 814 VG_STATIC void _console_end(void)
 815 {
 816    console_move_cursor( &vg_console.cursor_user,
 817                         &vg_console.cursor_pos,
 818                         vg_list_size(vg_console.input)-1, 1 );
 819 }
 820
 821 VG_STATIC void _console_select_all(void)
 822 {
 823    console_move_cursor( &vg_console.cursor_user, NULL,  10000, 0);
 824    console_move_cursor( &vg_console.cursor_pos,  NULL, -10000, 0);
 825 }
 826
 827 VG_STATIC void _console_cut(void)
 828 {
 829    console_to_clipboard();
 830    vg_console.cursor_user = console_delete_char(0);
 831    vg_console.cursor_pos = vg_console.cursor_user;
 832 }
 833
 834 VG_STATIC void _console_enter(void)
 835 {
 836    if( !strlen( vg_console.input ) )
 837       return;
 838
 839    vg_info( "%s\n", vg_console.input );
 840
 841    if( strcmp( vg_console.input,
 842             vg_console.history[ vg_console.history_last ]) )
 843    {
 844       vg_console.history_last = ( vg_console.history_last + 1) %
 845                                  vg_list_size(vg_console.history );
 846       vg_console.history_count =
 847          VG_MIN( vg_list_size( vg_console.history ),
 848                vg_console.history_count + 1 );
 849       strcpy( vg_console.history[ vg_console.history_last ],
 850               vg_console.input );
 851    }
 852
 853    vg_console.history_pos = -1;
 854    vg_execute_console_input( vg_console.input );
 855    console_move_cursor( &vg_console.cursor_user,
 856                         &vg_console.cursor_pos, -10000, 1 );
 857    vg_console.input[0] = '\0';
 858
 859    console_update_suggestions();
 860 }
 861
 862 /*
 863  * Suggestion controls
 864  */
 865 VG_STATIC void _console_fetch_suggestion(void)
 866 {
 867    char *target = &vg_console.input[ vg_console.suggestion_pastepos ];
 868
 869    if( vg_console.suggestion_select == -1 ){
 870       strcpy( target, vg_console.input_copy );
 871       console_move_cursor( &vg_console.cursor_user,
 872                            &vg_console.cursor_pos, 10000, 1 );
 873    }
 874    else{
 875       strncpy( target,
 876             vg_console.suggestions[ vg_console.suggestion_select ].str,
 877             vg_list_size( vg_console.input )-1 );
 878
 879       console_move_cursor( &vg_console.cursor_user,
 880                            &vg_console.cursor_pos, 10000, 1 );
 881       console_put_char( ' ' );
 882    }
 883 }
 884
 885 VG_STATIC void _console_suggest_store_normal(void)
 886 {
 887    if( vg_console.suggestion_select == -1 ){
 888       char *target = &vg_console.input[ vg_console.suggestion_pastepos ];
 889       strcpy( vg_console.input_copy, target );
 890    }
 891 }
 892
 893 VG_STATIC void _console_suggest_next(void)
 894 {
 895    if( vg_console.suggestion_count ){
 896       _console_suggest_store_normal();
 897
 898       vg_console.suggestion_select ++;
 899
 900       if( vg_console.suggestion_select >= vg_console.suggestion_count )
 901          vg_console.suggestion_select = -1;
 902
 903       _console_fetch_suggestion();
 904    }
 905 }
 906
 907 VG_STATIC void _console_suggest_prev(void)
 908 {
 909    if( vg_console.suggestion_count ){
 910       _console_suggest_store_normal();
 911
 912       vg_console.suggestion_select --;
 913
 914       if( vg_console.suggestion_select < -1 )
 915          vg_console.suggestion_select = vg_console.suggestion_count-1;
 916
 917       _console_fetch_suggestion();
 918    }
 919 }
 920
 921 /*
 922  * Handles binds
 923  */
 924 VG_STATIC void console_proc_key( SDL_Keysym ev )
 925 {
 926    /* Open / close console */
 927    if( ev.sym == SDLK_BACKQUOTE ){
 928       vg_console.enabled = !vg_console.enabled;
 929
 930       if( vg_console.enabled )
 931          SDL_StartTextInput();
 932       else
 933          SDL_StopTextInput();
 934    }
 935
 936    if( !vg_console.enabled ) return;
 937
 938    struct console_mapping
 939    {
 940       u16 mod;
 941       SDL_Keycode key;
 942
 943       void (*handler)(void);
 944    }
 945    mappings[] =
 946    {
 947       { 0,              SDLK_LEFT,       _console_left              },
 948       { KMOD_SHIFT,     SDLK_LEFT,       _console_left_select       },
 949       { 0,              SDLK_RIGHT,      _console_right             },
 950       { KMOD_SHIFT,     SDLK_RIGHT,      _console_right_select      },
 951       { 0,              SDLK_DOWN,       _console_down              },
 952       { 0,              SDLK_UP,         _console_up                },
 953       { 0,              SDLK_BACKSPACE,  _console_backspace         },
 954       { 0,              SDLK_DELETE,     _console_delete            },
 955       { 0,              SDLK_HOME,       _console_home              },
 956       { KMOD_SHIFT,     SDLK_HOME,       _console_home_select       },
 957       { 0,              SDLK_END,        _console_end               },
 958       { KMOD_SHIFT,     SDLK_END,        _console_end_select        },
 959       { KMOD_CTRL,      SDLK_a,          _console_select_all        },
 960       { KMOD_CTRL,      SDLK_c,          console_to_clipboard       },
 961       { KMOD_CTRL,      SDLK_x,          _console_cut               },
 962       { KMOD_CTRL,      SDLK_v,          console_clipboard_paste    },
 963       { 0,              SDLK_RETURN,     _console_enter             },
 964       { KMOD_CTRL,      SDLK_n,          _console_suggest_next      },
 965       { KMOD_CTRL,      SDLK_p,          _console_suggest_prev      }
 966    };
 967
 968    SDL_Keymod mod = 0;
 969
 970    if( ev.mod & KMOD_SHIFT )
 971       mod |= KMOD_SHIFT;
 972
 973    if( ev.mod & KMOD_CTRL )
 974       mod |= KMOD_CTRL;
 975
 976    if( ev.mod & KMOD_ALT )
 977       mod |= KMOD_ALT;
 978
 979    for( int i=0; i<vg_list_size( mappings ); i++ ){
 980       struct console_mapping *mapping = &mappings[i];
 981
 982       if( mapping->key == ev.sym ){
 983          if( mapping->mod == 0 ){
 984             if( mod == 0 ){
 985                mapping->handler();
 986                return;
 987             }
 988          }
 989          else if( (mod & mapping->mod) == mapping->mod ){
 990             mapping->handler();
 991             return;
 992          }
 993       }
 994    }
 995 }
 996
 997 /*
 998  * Callback for text entry mode
 999  */
1000 VG_STATIC void console_proc_utf8( const char *text )
1001 {
1002    const char *ptr = text;
1003
1004    while( *ptr ){
1005       if( *ptr != '`' )
1006          console_put_char( *ptr );
1007       ptr ++;
1008    }
1009
1010    console_update_suggestions();
1011 }
1012
1013 #endif /* VG_CONSOLE_H */