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 0
 143         if( !vg_console.enabled )
 144                 return;
 145
 146    SDL_AtomicLock( &log_print_sl );
 147
 148         int ptr = vg_log.buffer_line_current;
 149    int const fh = 14,
 150              log_lines = 32;
 151    int console_lines = VG_MIN( log_lines, vg_log.buffer_line_count );
 152
 153         vg_uictx.cursor[0] = 0;
 154         vg_uictx.cursor[1] = 0;
 155         vg_uictx.cursor[3] = log_lines*fh;
 156         ui_fill_x();
 157
 158    /*
 159     * log
 160     */
 161         ui_new_node();
 162         {
 163                 ui_fill_rect( vg_uictx.cursor, 0x77181818 );
 164
 165                 vg_uictx.cursor[3] = fh;
 166                 ui_align_bottom();
 167
 168                 for( int i=0; i<console_lines; i ++ ){
 169                         ptr --;
 170
 171                         if( ptr < 0 )
 172                                 ptr = vg_list_size( vg_log.buffer )-1;
 173
 174                         ui_text( vg_uictx.cursor, vg_log.buffer[ptr], 1, 0 );
 175                         vg_uictx.cursor[1] -= fh;
 176                 }
 177
 178         }
 179         ui_end_down();
 180
 181
 182    /* Input area */
 183         vg_uictx.cursor[1] += 2;
 184         vg_uictx.cursor[3] = fh;
 185
 186         ui_new_node();
 187         {
 188                 ui_fill_rect( vg_uictx.cursor, 0x77111111 );
 189                 ui_text( vg_uictx.cursor, vg_console.input, 1, 0 );
 190
 191                 int start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user ),
 192                          end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 193
 194                 vg_uictx.cursor[0] = start * UI_GLYPH_SPACING_X;
 195                 vg_uictx.cursor[2] = (start == end? 0.5f: (float)(end-start))
 196                                              * (float)UI_GLYPH_SPACING_X;
 197
 198                 ui_fill_rect( vg_uictx.cursor, 0x66ffffff );
 199         }
 200         ui_end_down();
 201
 202
 203    /* suggestions */
 204    if( vg_console.suggestion_count ){
 205       vg_uictx.cursor[0] += UI_GLYPH_SPACING_X * vg_console.suggestion_pastepos;
 206       vg_uictx.cursor[1] += 2;
 207       vg_uictx.cursor[3] = vg_console.suggestion_count * fh;
 208       vg_uictx.cursor[2] = UI_GLYPH_SPACING_X * vg_console.suggestion_maxlen;
 209
 210       ui_new_node();
 211       {
 212          ui_fill_rect( vg_uictx.cursor, 0x77040404 );
 213
 214          vg_uictx.cursor[3] = fh;
 215          for( int i=0; i<vg_console.suggestion_count; i ++ ){
 216             if( i == vg_console.suggestion_select )
 217                ui_fill_rect( vg_uictx.cursor, 0x66a0e508 );
 218
 219             ui_text( vg_uictx.cursor, vg_console.suggestions[i].str, 1, 0 );
 220             vg_uictx.cursor[1] += fh;
 221          }
 222       }
 223       ui_end_down();
 224    }
 225
 226    SDL_AtomicUnlock( &log_print_sl );
 227 #endif
 228 }
 229
 230 VG_STATIC int _vg_console_list( int argc, char const *argv[] )
 231 {
 232         for( int i=0; i<vg_console.function_count; i ++ ){
 233                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 234                 vg_info( "* %s\n", cmd->name );
 235         }
 236
 237         for( int i=0; i<vg_console.var_count; i ++ ){
 238                 struct vg_var *cv = &vg_console.vars[ i ];
 239                 vg_info( "%s\n", cv->name );
 240         }
 241
 242         return 0;
 243 }
 244
 245 int _test_break( int argc, const char *argv[] )
 246 {
 247    vg_fatal_error( "Test crash from main, after loading (console)" );
 248    return 0;
 249 }
 250
 251 int _vg_console_exec( int argc, const char *argv[] )
 252 {
 253    if( argc < 1 ) return 0;
 254
 255    char path[256];
 256    strcpy( path, "cfg/" );
 257    strncat( path, argv[0], 250 );
 258
 259         FILE *fp = fopen( path, "r" );
 260         if( fp ){
 261                 char line[256];
 262
 263                 while( fgets( line, sizeof( line ), fp ) ){
 264                         line[ strcspn( line, "\r\n#" ) ] = 0x00;
 265
 266                         if( line[0] != 0x00 ){
 267                                 vg_execute_console_input( line );
 268                         }
 269                 }
 270
 271                 fclose( fp );
 272         }
 273    else{
 274       vg_error( "Could not open '%s'\n", path );
 275    }
 276
 277    return 0;
 278 }
 279
 280 VG_STATIC void _vg_console_init(void)
 281 {
 282    vg_console_reg_cmd( "list", _vg_console_list, NULL );
 283    vg_console_reg_cmd( "crash", _test_break, NULL );
 284    vg_console_reg_cmd( "exec", _vg_console_exec, NULL );
 285 }
 286
 287 VG_STATIC void vg_console_load_autos(void)
 288 {
 289    _vg_console_exec( 1, (const char *[]){ "auto.conf" } );
 290 }
 291
 292 VG_STATIC void _vg_console_write_persistent(void)
 293 {
 294         FILE *fp = fopen( "cfg/auto.conf", "w" );
 295
 296         for( int i=0; i<vg_console.var_count; i ++ ){
 297                 struct vg_var *cv = &vg_console.vars[i];
 298
 299                 if( cv->flags & VG_VAR_PERSISTENT ){
 300                         switch( cv->data_type ){
 301                                 case k_var_dtype_i32:
 302                                         fprintf( fp, "%s %d\n", cv->name, *(i32 *)(cv->data) );
 303                                 break;
 304                                 case k_var_dtype_u32:
 305                                         fprintf( fp, "%s %u\n", cv->name, *(u32 *)(cv->data) );
 306                                 break;
 307                                 case k_var_dtype_f32:
 308                                         fprintf( fp, "%s %.5f\n", cv->name, *(float *)(cv->data ) );
 309                                 break;
 310                         }
 311                 }
 312         }
 313
 314         fclose( fp );
 315 }
 316
 317 VG_STATIC void _vg_console_free(void)
 318 {
 319         _vg_console_write_persistent();
 320 }
 321
 322 /*
 323  * splits src into tokens and fills out args as pointers to those tokens
 324  * returns number of tokens
 325  * dst must be as long as src
 326  */
 327 VG_STATIC int vg_console_tokenize( const char *src, char *dst,
 328                                    const char *args[8] )
 329 {
 330         int arg_count = 0,
 331        in_token = 0;
 332
 333         for( int i=0;; i ++ ){
 334                 if( src[i] ){
 335                         if( src[i] == ' ' || src[i] == '\t' ){
 336             if( in_token )
 337                dst[i] = '\0';
 338
 339                                 in_token = 0;
 340
 341                                 if( arg_count == 8 )
 342                                         break;
 343                         }
 344                         else{
 345                                 dst[i] = src[i];
 346
 347                                 if( !in_token ){
 348                                         args[ arg_count ++ ] = &dst[i];
 349                                         in_token = 1;
 350                                 }
 351                         }
 352                 }
 353                 else{
 354                         dst[i] = '\0';
 355                         break;
 356                 }
 357         }
 358
 359    return arg_count;
 360 }
 361
 362 VG_STATIC vg_var *vg_console_match_var( const char *kw )
 363 {
 364         for( int i=0; i<vg_console.var_count; i ++ ){
 365                 struct vg_var *cv = &vg_console.vars[ i ];
 366                 if( !strcmp( cv->name, kw ) ){
 367          return cv;
 368       }
 369    }
 370
 371    return NULL;
 372 }
 373
 374 VG_STATIC vg_cmd *vg_console_match_cmd( const char *kw )
 375 {
 376         for( int i=0; i<vg_console.function_count; i ++ ){
 377                 struct vg_cmd *cmd = &vg_console.functions[ i ];
 378                 if( !strcmp( cmd->name, kw ) ){
 379          return cmd;
 380       }
 381    }
 382
 383    return NULL;
 384 }
 385
 386 VG_STATIC void vg_execute_console_input( const char *cmd )
 387 {
 388         char temp[512];
 389         char const *args[8];
 390         int arg_count = vg_console_tokenize( cmd, temp, args );
 391
 392         if( arg_count == 0 )
 393                 return;
 394
 395    vg_var *cv = vg_console_match_var( args[0] );
 396    vg_cmd *fn = vg_console_match_cmd( args[0] );
 397
 398    assert( !(cv && fn) );
 399
 400    if( cv ){
 401       /* Cvar Matched, try get value */
 402       if( arg_count >= 2 ){
 403          if( (cv->data_type == k_var_dtype_u32) ||
 404              (cv->data_type == k_var_dtype_i32) )
 405          {
 406             int *ptr = cv->data;
 407             *ptr = atoi( args[1] );
 408          }
 409          else if( cv->data_type == k_var_dtype_f32 ){
 410             float *ptr = cv->data;
 411             *ptr = atof( args[1] );
 412          }
 413       }
 414       else{
 415          if( cv->data_type == k_var_dtype_i32 )
 416             vg_info( "= %d\n", *((int *)cv->data) );
 417          else if( cv->data_type == k_var_dtype_u32 )
 418             vg_info( "= %u\n", *((u32 *)cv->data) );
 419          else if( cv->data_type == k_var_dtype_f32 )
 420             vg_info( "= %.4f\n", *((float *)cv->data) );
 421       }
 422
 423       return;
 424         }
 425    else if( fn ){
 426       fn->function( arg_count-1, args+1 );
 427       return;
 428    }
 429
 430         vg_error( "No command/var named '%s'. Use 'list' to view all\n", args[0] );
 431 }
 432
 433 u32 str_lev_distance( const char *s1, const char *s2 )
 434 {
 435    u32 m = strlen( s1 ),
 436        n = strlen( s2 );
 437
 438    if( m==0 ) return n;
 439    if( n==0 ) return m;
 440
 441    assert( n+1 <= 256 );
 442
 443    u32 costs[ 256 ];
 444
 445    for( u32 k=0; k<=n; k++ )
 446       costs[k] = k;
 447
 448    u32 i = 0;
 449    for( u32 i=0; i<m; i++ ){
 450       costs[0] = i+1;
 451
 452       u32 corner = i;
 453
 454       for( u32 j=0; j<n; j++ ){
 455          u32 upper = costs[j+1];
 456
 457          if( s1[i] == s2[j] )
 458             costs[ j+1 ] = corner;
 459          else{
 460             u32 t = (upper < corner)? upper: corner;
 461             costs[j+1] = ((costs[j] < t)? costs[j]: t) + 1;
 462          }
 463
 464          corner = upper;
 465       }
 466    }
 467
 468    return costs[n];
 469 }
 470
 471 u32 str_lcs( const char *s1, const char *s2 )
 472 {
 473    u32 m = VG_MIN( 31, strlen( s1 ) ),
 474        n = VG_MIN( 31, strlen( s2 ) );
 475
 476    int suff[32][32],
 477        result = 0;
 478
 479    for( int i=0; i<=m; i++ ){
 480       for( int j=0; j<=n; j++ ){
 481          if( i == 0 || j == 0 )
 482             suff[i][j] = 0;
 483          else if( s1[i-1] == s2[j-1] ){
 484             suff[i][j] = suff[i-1][j-1] + 1;
 485             result = VG_MAX( result, suff[i][j] );
 486          }
 487          else
 488             suff[i][j] = 0;
 489       }
 490    }
 491
 492    return result;
 493 }
 494
 495 /* str must not fuckoff ever! */
 496 VG_STATIC void console_suggest_score_text( const char *str, const char *input,
 497                                            int minscore )
 498 {
 499    /* filter duplicates */
 500    for( int i=0; i<vg_console.suggestion_count; i++ )
 501       if( !strcmp( vg_console.suggestions[i].str, str ) )
 502          return;
 503
 504    /* calc score */
 505    u32 score = str_lcs( str, input );
 506
 507    if( score < minscore )
 508       return;
 509
 510    int best_pos = vg_console.suggestion_count;
 511    for( int j=best_pos-1; j>=0; j -- )
 512       if( score > vg_console.suggestions[j].lev_score )
 513          best_pos = j;
 514
 515    /* insert if good score */
 516    if( best_pos < vg_list_size( vg_console.suggestions ) ){
 517       int start = VG_MIN( vg_console.suggestion_count,
 518                           vg_list_size( vg_console.suggestions )-1 );
 519       for( int j=start; j>best_pos; j -- )
 520          vg_console.suggestions[j] = vg_console.suggestions[j-1];
 521
 522       vg_console.suggestions[ best_pos ].str = str;
 523       vg_console.suggestions[ best_pos ].len = strlen( str );
 524       vg_console.suggestions[ best_pos ].lev_score = score;
 525
 526       if( vg_console.suggestion_count <
 527             vg_list_size( vg_console.suggestions ) )
 528          vg_console.suggestion_count ++;
 529    }
 530 }
 531
 532 VG_STATIC void console_update_suggestions(void)
 533 {
 534    vg_console.suggestion_count = 0;
 535    vg_console.suggestion_select = -1;
 536    vg_console.suggestion_maxlen = 0;
 537
 538    /*
 539     * - must be typing something
 540     * - must be at the end
 541     * - prev char must not be a whitespace
 542     * - cursors should match
 543     */
 544
 545    if( vg_console.cursor_pos == 0 )
 546       return;
 547
 548    if( vg_console.cursor_pos != vg_console.cursor_user )
 549       return;
 550
 551    if( vg_console.input[ vg_console.cursor_pos ] != '\0' )
 552       return;
 553
 554    if(  (vg_console.input[ vg_console.cursor_pos -1 ] == ' ') ||
 555         (vg_console.input[ vg_console.cursor_pos -1 ] == '\t') )
 556       return;
 557
 558    char temp[128];
 559    const char *args[8];
 560
 561    int token_count = vg_console_tokenize( vg_console.input, temp, args );
 562
 563    vg_console.suggestion_pastepos = args[token_count-1]-temp;
 564
 565    /* Score all our commands and cvars */
 566    if( token_count == 1 ){
 567       for( int i=0; i<vg_console.var_count; i++ ){
 568          vg_var *cvar = &vg_console.vars[i];
 569          console_suggest_score_text( cvar->name, args[0], 1 );
 570       }
 571
 572       for( int i=0; i<vg_console.function_count; i++ ){
 573          vg_cmd *cmd = &vg_console.functions[i];
 574          console_suggest_score_text( cmd->name, args[0], 1 );
 575       }
 576    }
 577    else{
 578       vg_cmd *cmd = vg_console_match_cmd( args[0] );
 579       vg_var *var = vg_console_match_var( args[0] );
 580
 581       assert( !( cmd && var ) );
 582
 583       if( cmd )
 584          if( cmd->poll_suggest )
 585             cmd->poll_suggest( token_count-1, &args[1] );
 586    }
 587
 588    /* some post processing */
 589    for( int i=0; i<vg_console.suggestion_count; i++ ){
 590       vg_console.suggestion_maxlen = VG_MAX( vg_console.suggestion_maxlen,
 591                                              vg_console.suggestions[i].len );
 592
 593       if( vg_console.suggestions[i].lev_score <
 594           vg_console.suggestions[0].lev_score/2 )
 595       {
 596          vg_console.suggestion_count = i;
 597          return;
 598       }
 599    }
 600 }
 601
 602 /*
 603  * Console Interface
 604  */
 605 VG_STATIC void console_make_selection( int* start, int* end )
 606 {
 607         *start = VG_MIN( vg_console.cursor_pos, vg_console.cursor_user );
 608         *end   = VG_MAX( vg_console.cursor_pos, vg_console.cursor_user );
 609 }
 610
 611 VG_STATIC void console_move_cursor( int* cursor0, int* cursor1,
 612                                     int dir, int snap_together )
 613 {
 614         *cursor0 = VG_MAX( 0, vg_console.cursor_user + dir );
 615         *cursor0 =
 616       VG_MIN(
 617          VG_MIN( vg_list_size(vg_console.input)-1, strlen( vg_console.input )),
 618       *cursor0 );
 619
 620         if( snap_together )
 621                 *cursor1 = *cursor0;
 622 }
 623
 624 VG_STATIC int console_makeroom( int datastart, int length )
 625 {
 626         int move_to = VG_MIN( datastart+length, vg_list_size( vg_console.input )-1 );
 627         int move_amount = strlen( vg_console.input )-datastart;
 628         int move_end =
 629       VG_MIN( move_to+move_amount, vg_list_size( vg_console.input )-1 );
 630         move_amount = move_end-move_to;
 631
 632         if( move_amount )
 633                 memmove( &vg_console.input[ move_to ],
 634                &vg_console.input[ datastart ],
 635                move_end-move_to );
 636
 637         vg_console.input[ move_end ] = '\0';
 638
 639         return VG_MIN( length, vg_list_size( vg_console.input )-datastart-1 );
 640 }
 641
 642 VG_STATIC int console_delete_char( int direction )
 643 {
 644         int start, end;
 645         console_make_selection( &start, &end );
 646
 647         /* There is no selection */
 648         if( !(end-start) ){
 649                 if( direction == 1 ) end = VG_MIN( end+1, strlen( vg_console.input ) );
 650                 else if( direction == -1 ) start = VG_MAX( start-1, 0 );
 651         }
 652
 653         /* Still no selction, no need to do anything */
 654         if( !(end-start) )
 655                 return start;
 656
 657         /* Copy the end->terminator to start */
 658         int remaining_length = strlen( vg_console.input )+1-end;
 659         memmove( &vg_console.input[ start ],
 660             &vg_console.input[ end ],
 661             remaining_length );
 662         return start;
 663 }
 664
 665 VG_STATIC void console_to_clipboard(void)
 666 {
 667         int start, end;
 668         console_make_selection( &start, &end );
 669         char buffer[512];
 670
 671         if( end-start ){
 672                 memcpy( buffer, &vg_console.input[ start ], end-start );
 673                 buffer[ end-start ] = 0x00;
 674       SDL_SetClipboardText( buffer );
 675         }
 676 }
 677
 678 VG_STATIC void console_clipboard_paste(void)
 679 {
 680    if( !SDL_HasClipboardText() )
 681       return;
 682
 683    char *text = SDL_GetClipboardText();
 684
 685    if( !text )
 686       return;
 687
 688    int datastart = console_delete_char( 0 );
 689         int length = strlen( text );
 690         int cpylength = console_makeroom( datastart, length );
 691
 692         memcpy( vg_console.input + datastart, text, cpylength);
 693         console_move_cursor( &vg_console.cursor_user,
 694                         &vg_console.cursor_pos, cpylength, 1 );
 695    SDL_free( text );
 696
 697    console_update_suggestions();
 698 }
 699
 700 VG_STATIC void console_put_char( char c )
 701 {
 702         if( !vg_console.enabled )
 703                 return;
 704
 705         vg_console.cursor_user = console_delete_char(0);
 706
 707         if( console_makeroom( vg_console.cursor_user, 1 ) )
 708                 vg_console.input[ vg_console.cursor_user ] = c;
 709
 710         console_move_cursor( &vg_console.cursor_user, &vg_console.cursor_pos, 1, 1 );
 711 }
 712
 713 VG_STATIC void console_history_get( char* buf, int entry_num )
 714 {
 715         if( !vg_console.history_count )
 716                 return;
 717
 718    int offset = VG_MIN( entry_num, vg_console.history_count -1 ),
 719        pick = (vg_console.history_last - offset) %
 720                vg_list_size( vg_console.history );
 721         strcpy( buf, vg_console.history[ pick ] );
 722 }
 723
 724 /* Receed secondary cursor */
 725 VG_STATIC void _console_left_select(void)
 726 {
 727    console_move_cursor( &vg_console.cursor_user, NULL, -1, 0 );
 728 }
 729
 730 /* Match and receed both cursors */
 731 VG_STATIC void _console_left(void)
 732 {
 733    int cursor_diff = vg_console.cursor_pos - vg_console.cursor_user? 0: 1;
 734
 735    console_move_cursor( &vg_console.cursor_user,
 736                         &vg_console.cursor_pos, -cursor_diff, 1 );
 737 }
 738
 739 VG_STATIC void _console_right_select(void)
 740 {
 741    console_move_cursor( &vg_console.cursor_user, NULL, 1, 0 );
 742 }
 743
 744 VG_STATIC void _console_right(void)
 745 {
 746    int cursor_diff = vg_console.cursor_pos - vg_console.cursor_user? 0: 1;
 747
 748    console_move_cursor( &vg_console.cursor_user,
 749                         &vg_console.cursor_pos, +cursor_diff, 1 );
 750 }
 751
 752 VG_STATIC void _console_down(void)
 753 {
 754    vg_console.history_pos = VG_MAX( 0, vg_console.history_pos-1 );
 755    console_history_get( vg_console.input, vg_console.history_pos );
 756
 757    console_move_cursor( &vg_console.cursor_user,
 758                         &vg_console.cursor_pos,
 759                         vg_list_size(vg_console.input)-1, 1 );
 760 }
 761
 762 VG_STATIC void _console_up(void)
 763 {
 764    vg_console.history_pos = VG_MAX
 765    (
 766       0,
 767       VG_MIN
 768       (
 769          vg_console.history_pos+1,
 770          VG_MIN
 771          (
 772             vg_list_size( vg_console.history ),
 773             vg_console.history_count - 1
 774          )
 775       )
 776    );
 777
 778    console_history_get( vg_console.input, vg_console.history_pos );
 779    console_move_cursor( &vg_console.cursor_user,
 780                         &vg_console.cursor_pos,
 781                         vg_list_size(vg_console.input)-1, 1);
 782 }
 783
 784 VG_STATIC void _console_backspace(void)
 785 {
 786    vg_console.cursor_user = console_delete_char( -1 );
 787    vg_console.cursor_pos = vg_console.cursor_user;
 788
 789    console_update_suggestions();
 790 }
 791
 792 VG_STATIC void _console_delete(void)
 793 {
 794    vg_console.cursor_user = console_delete_char( 1 );
 795    vg_console.cursor_pos = vg_console.cursor_user;
 796
 797    console_update_suggestions();
 798 }
 799
 800 VG_STATIC void _console_home_select(void)
 801 {
 802    console_move_cursor( &vg_console.cursor_user, NULL, -10000, 0 );
 803 }
 804
 805 VG_STATIC void _console_home(void)
 806 {
 807    console_move_cursor( &vg_console.cursor_user,
 808                         &vg_console.cursor_pos, -10000, 1 );
 809 }
 810
 811 VG_STATIC void _console_end_select(void)
 812 {
 813    console_move_cursor( &vg_console.cursor_user, NULL, 10000, 0 );
 814 }
 815
 816 VG_STATIC void _console_end(void)
 817 {
 818    console_move_cursor( &vg_console.cursor_user,
 819                         &vg_console.cursor_pos,
 820                         vg_list_size(vg_console.input)-1, 1 );
 821 }
 822
 823 VG_STATIC void _console_select_all(void)
 824 {
 825    console_move_cursor( &vg_console.cursor_user, NULL,  10000, 0);
 826    console_move_cursor( &vg_console.cursor_pos,  NULL, -10000, 0);
 827 }
 828
 829 VG_STATIC void _console_cut(void)
 830 {
 831    console_to_clipboard();
 832    vg_console.cursor_user = console_delete_char(0);
 833    vg_console.cursor_pos = vg_console.cursor_user;
 834 }
 835
 836 VG_STATIC void _console_enter(void)
 837 {
 838    if( !strlen( vg_console.input ) )
 839       return;
 840
 841    vg_info( "%s\n", vg_console.input );
 842
 843    if( strcmp( vg_console.input,
 844             vg_console.history[ vg_console.history_last ]) )
 845    {
 846       vg_console.history_last = ( vg_console.history_last + 1) %
 847                                  vg_list_size(vg_console.history );
 848       vg_console.history_count =
 849          VG_MIN( vg_list_size( vg_console.history ),
 850                vg_console.history_count + 1 );
 851       strcpy( vg_console.history[ vg_console.history_last ],
 852               vg_console.input );
 853    }
 854
 855    vg_console.history_pos = -1;
 856    vg_execute_console_input( vg_console.input );
 857    console_move_cursor( &vg_console.cursor_user,
 858                         &vg_console.cursor_pos, -10000, 1 );
 859    vg_console.input[0] = '\0';
 860
 861    console_update_suggestions();
 862 }
 863
 864 /*
 865  * Suggestion controls
 866  */
 867 VG_STATIC void _console_fetch_suggestion(void)
 868 {
 869    char *target = &vg_console.input[ vg_console.suggestion_pastepos ];
 870
 871    if( vg_console.suggestion_select == -1 ){
 872       strcpy( target, vg_console.input_copy );
 873       console_move_cursor( &vg_console.cursor_user,
 874                            &vg_console.cursor_pos, 10000, 1 );
 875    }
 876    else{
 877       strncpy( target,
 878             vg_console.suggestions[ vg_console.suggestion_select ].str,
 879             vg_list_size( vg_console.input )-1 );
 880
 881       console_move_cursor( &vg_console.cursor_user,
 882                            &vg_console.cursor_pos, 10000, 1 );
 883       console_put_char( ' ' );
 884    }
 885 }
 886
 887 VG_STATIC void _console_suggest_store_normal(void)
 888 {
 889    if( vg_console.suggestion_select == -1 ){
 890       char *target = &vg_console.input[ vg_console.suggestion_pastepos ];
 891       strcpy( vg_console.input_copy, target );
 892    }
 893 }
 894
 895 VG_STATIC void _console_suggest_next(void)
 896 {
 897    if( vg_console.suggestion_count ){
 898       _console_suggest_store_normal();
 899
 900       vg_console.suggestion_select ++;
 901
 902       if( vg_console.suggestion_select >= vg_console.suggestion_count )
 903          vg_console.suggestion_select = -1;
 904
 905       _console_fetch_suggestion();
 906    }
 907 }
 908
 909 VG_STATIC void _console_suggest_prev(void)
 910 {
 911    if( vg_console.suggestion_count ){
 912       _console_suggest_store_normal();
 913
 914       vg_console.suggestion_select --;
 915
 916       if( vg_console.suggestion_select < -1 )
 917          vg_console.suggestion_select = vg_console.suggestion_count-1;
 918
 919       _console_fetch_suggestion();
 920    }
 921 }
 922
 923 /*
 924  * Handles binds
 925  */
 926 VG_STATIC void console_proc_key( SDL_Keysym ev )
 927 {
 928    /* Open / close console */
 929    if( ev.sym == SDLK_BACKQUOTE ){
 930       vg_console.enabled = !vg_console.enabled;
 931
 932       if( vg_console.enabled ){
 933          vg_info( "SDL_StartTextInput()\n" );
 934          SDL_StartTextInput();
 935       }
 936       else{
 937          SDL_StopTextInput();
 938       }
 939    }
 940
 941    if( !vg_console.enabled ) return;
 942
 943    struct console_mapping
 944    {
 945       u16 mod;
 946       SDL_Keycode key;
 947
 948       void (*handler)(void);
 949    }
 950    mappings[] =
 951    {
 952       { 0,              SDLK_LEFT,       _console_left              },
 953       { KMOD_SHIFT,     SDLK_LEFT,       _console_left_select       },
 954       { 0,              SDLK_RIGHT,      _console_right             },
 955       { KMOD_SHIFT,     SDLK_RIGHT,      _console_right_select      },
 956       { 0,              SDLK_DOWN,       _console_down              },
 957       { 0,              SDLK_UP,         _console_up                },
 958       { 0,              SDLK_BACKSPACE,  _console_backspace         },
 959       { 0,              SDLK_DELETE,     _console_delete            },
 960       { 0,              SDLK_HOME,       _console_home              },
 961       { KMOD_SHIFT,     SDLK_HOME,       _console_home_select       },
 962       { 0,              SDLK_END,        _console_end               },
 963       { KMOD_SHIFT,     SDLK_END,        _console_end_select        },
 964       { KMOD_CTRL,      SDLK_a,          _console_select_all        },
 965       { KMOD_CTRL,      SDLK_c,          console_to_clipboard       },
 966       { KMOD_CTRL,      SDLK_x,          _console_cut               },
 967       { KMOD_CTRL,      SDLK_v,          console_clipboard_paste    },
 968       { 0,              SDLK_RETURN,     _console_enter             },
 969       { KMOD_CTRL,      SDLK_n,          _console_suggest_next      },
 970       { KMOD_CTRL,      SDLK_p,          _console_suggest_prev      }
 971    };
 972
 973    SDL_Keymod mod = 0;
 974
 975    if( ev.mod & KMOD_SHIFT )
 976       mod |= KMOD_SHIFT;
 977
 978    if( ev.mod & KMOD_CTRL )
 979       mod |= KMOD_CTRL;
 980
 981    if( ev.mod & KMOD_ALT )
 982       mod |= KMOD_ALT;
 983
 984    for( int i=0; i<vg_list_size( mappings ); i++ ){
 985       struct console_mapping *mapping = &mappings[i];
 986
 987       if( mapping->key == ev.sym ){
 988          if( mapping->mod == 0 ){
 989             if( mod == 0 ){
 990                mapping->handler();
 991                return;
 992             }
 993          }
 994          else if( (mod & mapping->mod) == mapping->mod ){
 995             mapping->handler();
 996             return;
 997          }
 998       }
 999    }
1000 }
1001
1002 /*
1003  * Callback for text entry mode
1004  */
1005 VG_STATIC void console_proc_utf8( const char *text )
1006 {
1007    const char *ptr = text;
1008
1009    while( *ptr ){
1010       if( *ptr != '`' )
1011          console_put_char( *ptr );
1012       ptr ++;
1013    }
1014
1015    console_update_suggestions();
1016 }
1017
1018 #endif /* VG_CONSOLE_H */