retrocon.h

 
#ifndef RETROCON_H
#define RETROCON_H
 
#define RETROCON_DEBOUNCE_WAIT 3
 
#define RETROCON_FLAG_ACTIVE 0x01
 
#define RETROCON_IDC_TEXTBOX  1
 
#define RETROCON_IDC_CON_BASE 10
 
#define RETROCON_IDC_CLOSE (-1)
 
#ifndef RETROCON_TRACE_LVL
#  define RETROCON_TRACE_LVL 0
#endif /* !RETROCON_TRACE_LVL */
 
#ifdef RETROCON_DISABLE
 
struct RETROCON {
   uint8_t flags;
   RETROFLAT_COLOR lbuffer_color;
   RETROFLAT_COLOR sbuffer_color;
   RETROFLAT_COLOR bg_color;
};
 
#  define retrocon_init( con, fn, x, y, w, h ) (MERROR_OK)
 
#  define retrocon_add_command( con, cmd, cb, cb_data ) (MERROR_OK)
 
#  define retrocon_display( con, display )
 
#  define retrocon_print_line( con, line )
 
#  define retrocon_exec_line( con, line, line_sz )
 
#  define retrocon_debounce( con, c )
 
#  define retrocon_input( con, p_c, input_evt, p_idc, win_stack )
 
#  define retrocon_shutdown( con )
 
#else
 
#ifndef RETROCON_TRACE_LVL
#  define RETROCON_TRACE_LVL 0
#endif /* !RETROCON_TRACE_LVL */
 
#ifndef RETROCON_SBUFFER_SZ_MAX
#  define RETROCON_SBUFFER_SZ_MAX 4096
#endif /* !RETROCON_SBUFFER_SZ_MAX */
 
#ifndef RETROCON_SBUFFER_LINES_MAX
#  define RETROCON_SBUFFER_LINES_MAX 30
#endif /* !RETROCON_SBUFFER_LINES_MAX */
 
#ifndef RETROCON_LBUFFER_SZ_MAX
#  define RETROCON_LBUFFER_SZ_MAX 256
#endif /* !RETROCON_LBUFFER_SZ_MAX */
 
#ifndef RETROCON_ACTIVE_KEY
#  define RETROCON_ACTIVE_KEY RETROFLAT_KEY_GRAVE
#endif /* !RETROCON_ACTIVE_KEY */
 
#ifndef RETROCON_CB_NAME_SZ_MAX
#  define RETROCON_CB_NAME_SZ_MAX 32
#endif /* !RETROCON_CB_NAME_SZ_MAX */
 
#ifndef RETROCON_CB_SZ_MAX
#  define RETROCON_CB_SZ_MAX 128
#endif /* !RETROCON_CB_SZ_MAX */
 
struct RETROCON;
 
typedef MERROR_RETVAL (*retrocon_cb)(
   struct RETROCON* con, const char* line, size_t line_sz, void* data );
 
struct RETROCON {
   uint8_t flags;
   struct RETROGUI gui;
   int input_prev;
   int debounce_wait;
   void* callback_data[RETROCON_CB_SZ_MAX];
   char callback_names[RETROCON_CB_SZ_MAX][RETROCON_CB_NAME_SZ_MAX + 1];
   retrocon_cb callbacks[RETROCON_CB_SZ_MAX];
   size_t callbacks_sz;
   RETROFLAT_COLOR lbuffer_color;
   RETROFLAT_COLOR sbuffer_color;
   RETROFLAT_COLOR bg_color;
   size_t sbuffer_lines;
};
 
MERROR_RETVAL retrocon_init(
   struct RETROCON* con, const char* font_name,
   size_t x, size_t y, size_t w, size_t h );
 
MERROR_RETVAL retrocon_add_command(
   struct RETROCON* con, const char* cmd, retrocon_cb cb, void* cb_data );
 
MERROR_RETVAL retrocon_print_line( struct RETROCON* con, const char* line );
 
MERROR_RETVAL retrocon_exec_line(
   struct RETROCON* con, char* line, size_t line_sz );
 
int retrocon_debounce( struct RETROCON* con, int c );
 
MERROR_RETVAL retrocon_input(
   struct RETROCON* con, RETROFLAT_IN_KEY* p_c,
   struct RETROFLAT_INPUT* input_evt,
   retrogui_idc_t* p_idc_out, struct MDATA_VECTOR* win_stack );
 
MERROR_RETVAL retrocon_display(
   struct RETROCON* con, retroflat_blit_t* gui_bmp );
 
void retrocon_shutdown( struct RETROCON* con );
 
#ifdef RETROCON_C
 
static MERROR_RETVAL retrocon_cmd_print(
   struct RETROCON* con, const char* line, size_t line_sz, void* data
) {
   MERROR_RETVAL retval = MERROR_OK;
   char* print_line = NULL;
 
   print_line = maug_strchr( line, ' ' );
   if( NULL == print_line ) {
      /* Not technically an error. */
      goto cleanup;
   }
 
   /* Skip space. */
   print_line++;
   
   retrocon_print_line( con, print_line );
 
cleanup:
 
   return retval;
}
 
static MERROR_RETVAL retrocon_cmd_quit(
   struct RETROCON* con, const char* line, size_t line_sz, void* data
) {
   MERROR_RETVAL retval = MERROR_OK;
 
   retroflat_quit( 0 );
 
   return retval;
}
 
MERROR_RETVAL retrocon_init(
   struct RETROCON* con, const char* font_name,
   size_t x, size_t y, size_t w, size_t h
) {
   MERROR_RETVAL retval = MERROR_OK;
   union RETROGUI_CTL ctl;
   size_t ctl_y_iter = 0;
 
   debug_printf( RETROCON_TRACE_LVL, "initializing console..." );
 
   retval = retrogui_init( &(con->gui) );
   maug_cleanup_if_not_ok();
 
   retval = retrogui_set_font( &(con->gui), font_name );
   maug_cleanup_if_not_ok();
 
   con->sbuffer_color = RETROFLAT_COLOR_DARKBLUE;
   con->lbuffer_color = RETROFLAT_COLOR_DARKBLUE;
   con->gui.x = x;
   con->gui.y = y;
   con->gui.w = w;
   con->gui.h = h;
 
      retrogui_init_ctl(
         &ctl, RETROGUI_CTL_TYPE_TEXTBOX, RETROCON_IDC_TEXTBOX );
 
      ctl.base.x = 5;
      ctl.base.y = 5;
      ctl.base.w = con->gui.w - 10;
      ctl.base.h = 20; /* TODO: Dynamic height based on font. */
      ctl.base.fg_color = RETROFLAT_COLOR_DARKBLUE;
 
      retval = retrogui_push_ctl( &(con->gui), &ctl );
      maug_cleanup_if_not_ok();
 
      ctl_y_iter = ctl.base.y + ctl.base.h + 1;
      while( h - 5 > ctl_y_iter + 8 + 1 ) {
         retrogui_init_ctl(
            &ctl, RETROGUI_CTL_TYPE_LABEL,
            RETROCON_IDC_CON_BASE + con->sbuffer_lines );
 
         ctl.base.x = 5;
         ctl.base.y = ctl_y_iter;
         ctl.base.w = con->gui.w - 10;
         ctl.base.h = 8; /* TODO: Dynamic height based on font. */
         ctl.base.fg_color = RETROFLAT_COLOR_DARKGRAY;
         ctl.LABEL.label = "xxxxxx";
 
         retval = retrogui_push_ctl( &(con->gui), &ctl );
         maug_cleanup_if_not_ok();
 
         ctl_y_iter += ctl.base.h + 1;
         con->sbuffer_lines++;
      }
 
   con->gui.focus_idc = RETROCON_IDC_TEXTBOX;
 
   retval = retrocon_add_command( con, "PRINT", retrocon_cmd_print, NULL );
   maug_cleanup_if_not_ok();
   retval = retrocon_add_command( con, "QUIT", retrocon_cmd_quit, NULL );
   maug_cleanup_if_not_ok();
 
cleanup:
 
   return retval;
}
 
MERROR_RETVAL retrocon_add_command(
   struct RETROCON* con, const char* cmd, retrocon_cb cb, void* cb_data
) {
   MERROR_RETVAL retval = MERROR_OK;
 
   debug_printf( RETROCON_TRACE_LVL, "adding console command: %s", cmd );
 
   maug_cleanup_if_ge_overflow( con->callbacks_sz + 1, RETROCON_CB_SZ_MAX );
 
   maug_strncpy(
      con->callback_names[con->callbacks_sz], cmd, RETROCON_CB_NAME_SZ_MAX );
 
   con->callbacks[con->callbacks_sz] = cb;
 
   con->callback_data[con->callbacks_sz] = cb_data;
 
   con->callbacks_sz++;
 
cleanup:
 
   return retval;
}
 
/* === */
 
MERROR_RETVAL retrocon_print_line( struct RETROCON* con, const char* line ) {
   char sbuffer_shift[RETROCON_LBUFFER_SZ_MAX + 1] = { 0 };
   size_t i = 0;
   MERROR_RETVAL retval = MERROR_OK;
 
   /* TODO: Escape newlines in line. */
 
   /* Shift existing screen buffer lines all down by one. */
   for( i = con->sbuffer_lines - 1 ; 0 < i ; i-- ) {
      debug_printf( RETROCON_TRACE_LVL,
         "copying sbuffer line " SIZE_T_FMT " to " SIZE_T_FMT "...",
         i - 1, i );
      maug_mzero( sbuffer_shift, RETROCON_LBUFFER_SZ_MAX + 1 );
      retval = retrogui_get_ctl_text(
         &(con->gui), RETROCON_IDC_CON_BASE + i - 1,
         sbuffer_shift, RETROCON_LBUFFER_SZ_MAX );
      maug_cleanup_if_not_ok();
      retval = retrogui_set_ctl_text(
         &(con->gui), RETROCON_IDC_CON_BASE + i,
         RETROCON_LBUFFER_SZ_MAX, sbuffer_shift );
      maug_cleanup_if_not_ok();
   }
 
   /* Put line in first sbuffer line. */
   retval = retrogui_set_ctl_text(
      &(con->gui), RETROCON_IDC_CON_BASE,
      RETROCON_LBUFFER_SZ_MAX, line );
   maug_cleanup_if_not_ok();
 
cleanup:
 
   return retval;
}
 
/* === */
 
MERROR_RETVAL retrocon_exec_line(
   struct RETROCON* con, char* line, size_t line_sz
) {
   MERROR_RETVAL retval = MERROR_OK;
   size_t i = 0;
   char line_cap[RETROCON_LBUFFER_SZ_MAX + 1];
 
   /* Create an uppercase for comparison. */
   maug_mzero( line_cap, RETROCON_LBUFFER_SZ_MAX + 1 );
   maug_strncpy( line_cap, line, RETROCON_LBUFFER_SZ_MAX );
   maug_str_upper( line_cap, line_sz );
 
   /* Find callback with name starting line. */
   for( i = 0 ; con->callbacks_sz > i ; i++ ) {
      if(
         0 == strncmp(
            /* TODO: Compare up to first space in line. */
            con->callback_names[i], line_cap,
            maug_strlen( con->callback_names[i] ) )
      ) {
         retval = con->callbacks[i](
            con, line, line_sz, con->callback_data[i] );
         goto cleanup;
      }
   }
 
   retrocon_print_line( con, "COMMAND NOT FOUND!" );
 
cleanup:
 
   return retval;
}
 
/* === */
 
MERROR_RETVAL retrocon_input(
   struct RETROCON* con, RETROFLAT_IN_KEY* p_c,
   struct RETROFLAT_INPUT* input_evt,
   retrogui_idc_t* p_idc_out, struct MDATA_VECTOR* win_stack
) {
   MERROR_RETVAL retval = MERROR_OK;
   char lbuffer[RETROCON_LBUFFER_SZ_MAX + 1] = { 0 };
 
   *p_idc_out = RETROGUI_IDC_NONE;
 
   if( *p_c == RETROCON_ACTIVE_KEY ) {
      debug_printf( RETROCON_TRACE_LVL, "active key pressed" );
      if( RETROCON_FLAG_ACTIVE != (RETROCON_FLAG_ACTIVE & (con)->flags) ) {
         debug_printf( RETROCON_TRACE_LVL, "opening console..." );
         (con)->flags |= RETROCON_FLAG_ACTIVE;
         (con)->gui.flags |= RETROGUI_FLAGS_DIRTY;
 
         if( NULL != win_stack ) {
            retval = retrowin_push_win(
               &((con)->gui), win_stack,
               /* Use the IDC provided in p_idc_out for the window IDC. */
               *p_idc_out,
               NULL, (con)->gui.x, (con)->gui.y,
               (con)->gui.w, (con)->gui.h, RETROWIN_FLAG_BORDER_BLUE );
            maug_cleanup_if_not_ok();
         }
 
         debug_printf( RETROCON_TRACE_LVL, "console open!" );
      } else {
         debug_printf( RETROCON_TRACE_LVL, "closing console..." );
         con->flags &= ~RETROCON_FLAG_ACTIVE;
 
         if( NULL != win_stack ) {
            retrowin_destroy_win( win_stack, *p_idc_out );
            debug_printf( RETROCON_TRACE_LVL, "console closed!" );
         }
 
         /* Return, in case the caller needs to do something with this. */
         *p_idc_out = RETROCON_IDC_CLOSE;
      }
      *p_c = 0;
      goto cleanup;
   } else if( RETROCON_FLAG_ACTIVE != (RETROCON_FLAG_ACTIVE & (con)->flags) ) {
      goto cleanup;
   }
 
   /* debug_printf( RETROCON_TRACE_LVL, "processing console input..." ); */
 
      *p_idc_out = retrogui_poll_ctls( &(con->gui), p_c, input_evt );
 
   *p_c = 0; /* If we got this far then don't pass keystroke back. */
 
   if( RETROCON_IDC_TEXTBOX == *p_idc_out ) {
      retval = retrogui_get_ctl_text(
         &(con->gui), RETROCON_IDC_TEXTBOX, lbuffer, RETROCON_LBUFFER_SZ_MAX );
      maug_cleanup_if_not_ok();
      retval = retrogui_set_ctl_text(
         &(con->gui), RETROCON_IDC_TEXTBOX, 1, "" );
      maug_cleanup_if_not_ok();
 
      if( 0 == maug_strlen( lbuffer ) ) {
         /* Do nothing if line is empty. */
         goto cleanup;
      }
 
      /* Execute/reset line. */
      retval = retrocon_exec_line( con, lbuffer, maug_strlen( lbuffer ) );
   }
 
#if 0
   /* Debounce retrocon track only! */
   if( !retrocon_debounce( con, c ) ) {
      goto cleanup;
   }
 
   /* Process input. */
   switch( c ) {
   case RETROCON_ACTIVE_KEY:
      if( RETROCON_FLAG_ACTIVE == (RETROCON_FLAG_ACTIVE & con->flags) ) {
         con->flags &= ~RETROCON_FLAG_ACTIVE;
      } else {
         con->flags |= RETROCON_FLAG_ACTIVE;
      }
      break;
 
   case 0:
      break;
 
   case 0x08:
      /* Backspace. */
      if( 0 < con->lbuffer_sz ) {
         con->lbuffer_sz--;
         con->lbuffer[con->lbuffer_sz] = '\0';
      }
      break;
 
   case '\r':
   case '\n':
      if( 0 == con->lbuffer_sz ) {
         /* Do nothing if line is empty. */
         break;
      }
 
      /* Execute/reset line. */
      retval = retrocon_exec_line( con, con->lbuffer, con->lbuffer_sz );
      con->lbuffer_sz = 0;
      con->lbuffer[con->lbuffer_sz] = '\0';
      break;
 
   default:
      c = retroflat_vk_to_ascii(
         c, input_evt->key_flags | RETROFLAT_INPUT_FORCE_UPPER );
      if(
         /* Active and printable chars get added to line buffer. */
         RETROCON_FLAG_ACTIVE == (RETROCON_FLAG_ACTIVE & con->flags)  &&
         0 < c
      ) {
         con->lbuffer[con->lbuffer_sz++] = c;
         con->lbuffer[con->lbuffer_sz] = '\0';
      }
      break;
   }
#endif
 
cleanup:
 
   return retval;
}
 
/* === */
 
MERROR_RETVAL retrocon_display(
   struct RETROCON* con, retroflat_blit_t* gui_bmp
) {
   MERROR_RETVAL retval = MERROR_OK;
 
   if( RETROCON_FLAG_ACTIVE != (RETROCON_FLAG_ACTIVE & (con)->flags) ) {
      goto cleanup;
   }
 
   (con)->gui.draw_bmp = (gui_bmp);
   (con)->gui.flags |= RETROGUI_FLAGS_DIRTY;
 
   retrogui_redraw_ctls( &((con)->gui) );
 
cleanup:
 
   return retval;
}
 
/* === */
 
void retrocon_shutdown( struct RETROCON* con ) {
#ifndef RETROGXC_PRESENT
   retrofont_free( &(con->gui.font.handle) );
#endif /* !RETROGXC_PRESENT */
   retrogui_destroy( &(con->gui) );
}
 
#endif /* RETROCON_C */
 /* maug_console */
 
#endif /* RETROCON_DISABLE */
 
#endif /* !RETROCON_H */