arch/all-pc/boot/grub2-aros/include/grub/term.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2002,2003,2005,2007,2008,2009,2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_TERM_HEADER
  20 #define GRUB_TERM_HEADER        1
  21
  22 #define GRUB_TERM_NO_KEY        0
  23
  24 /* Internal codes used by GRUB to represent terminal input.  */
  25 /* Only for keys otherwise not having shifted modification.  */
  26 #define GRUB_TERM_SHIFT         0x01000000
  27 #define GRUB_TERM_CTRL          0x02000000
  28 #define GRUB_TERM_ALT           0x04000000
  29
  30 /* Keys without associated character.  */
  31 #define GRUB_TERM_EXTENDED      0x00800000
  32 #define GRUB_TERM_KEY_MASK      0x00ffffff
  33
  34 #define GRUB_TERM_KEY_LEFT      (GRUB_TERM_EXTENDED | 0x4b)
  35 #define GRUB_TERM_KEY_RIGHT     (GRUB_TERM_EXTENDED | 0x4d)
  36 #define GRUB_TERM_KEY_UP        (GRUB_TERM_EXTENDED | 0x48)
  37 #define GRUB_TERM_KEY_DOWN      (GRUB_TERM_EXTENDED | 0x50)
  38 #define GRUB_TERM_KEY_HOME      (GRUB_TERM_EXTENDED | 0x47)
  39 #define GRUB_TERM_KEY_END       (GRUB_TERM_EXTENDED | 0x4f)
  40 #define GRUB_TERM_KEY_DC        (GRUB_TERM_EXTENDED | 0x53)
  41 #define GRUB_TERM_KEY_PPAGE     (GRUB_TERM_EXTENDED | 0x49)
  42 #define GRUB_TERM_KEY_NPAGE     (GRUB_TERM_EXTENDED | 0x51)
  43 #define GRUB_TERM_KEY_F1        (GRUB_TERM_EXTENDED | 0x3b)
  44 #define GRUB_TERM_KEY_F2        (GRUB_TERM_EXTENDED | 0x3c)
  45 #define GRUB_TERM_KEY_F3        (GRUB_TERM_EXTENDED | 0x3d)
  46 #define GRUB_TERM_KEY_F4        (GRUB_TERM_EXTENDED | 0x3e)
  47 #define GRUB_TERM_KEY_F5        (GRUB_TERM_EXTENDED | 0x3f)
  48 #define GRUB_TERM_KEY_F6        (GRUB_TERM_EXTENDED | 0x40)
  49 #define GRUB_TERM_KEY_F7        (GRUB_TERM_EXTENDED | 0x41)
  50 #define GRUB_TERM_KEY_F8        (GRUB_TERM_EXTENDED | 0x42)
  51 #define GRUB_TERM_KEY_F9        (GRUB_TERM_EXTENDED | 0x43)
  52 #define GRUB_TERM_KEY_F10       (GRUB_TERM_EXTENDED | 0x44)
  53 #define GRUB_TERM_KEY_F11       (GRUB_TERM_EXTENDED | 0x57)
  54 #define GRUB_TERM_KEY_F12       (GRUB_TERM_EXTENDED | 0x58)
  55 #define GRUB_TERM_KEY_INSERT    (GRUB_TERM_EXTENDED | 0x52)
  56 #define GRUB_TERM_KEY_CENTER    (GRUB_TERM_EXTENDED | 0x4c)
  57
  58 #define GRUB_TERM_ESC           '\e'
  59 #define GRUB_TERM_TAB           '\t'
  60 #define GRUB_TERM_BACKSPACE     '\b'
  61
  62 #define GRUB_PROGRESS_NO_UPDATE -1
  63 #define GRUB_PROGRESS_FAST      0
  64 #define GRUB_PROGRESS_SLOW      2
  65
  66 #ifndef ASM_FILE
  67
  68 #include <grub/err.h>
  69 #include <grub/symbol.h>
  70 #include <grub/types.h>
  71 #include <grub/unicode.h>
  72 #include <grub/list.h>
  73
  74 /* These are used to represent the various color states we use.  */
  75 typedef enum
  76   {
  77     /* The color used to display all text that does not use the
  78        user defined colors below.  */
  79     GRUB_TERM_COLOR_STANDARD,
  80     /* The user defined colors for normal text.  */
  81     GRUB_TERM_COLOR_NORMAL,
  82     /* The user defined colors for highlighted text.  */
  83     GRUB_TERM_COLOR_HIGHLIGHT
  84   }
  85 grub_term_color_state;
  86
  87 /* Flags for representing the capabilities of a terminal.  */
  88 /* Some notes about the flags:
  89    - These flags are used by higher-level functions but not terminals
  90    themselves.
  91    - If a terminal is dumb, you may assume that only putchar, getkey and
  92    checkkey are called.
  93    - Some fancy features (setcolorstate, setcolor and setcursor) can be set
  94    to NULL.  */
  95
  96 /* Set when input characters shouldn't be echoed back.  */
  97 #define GRUB_TERM_NO_ECHO               (1 << 0)
  98 /* Set when the editing feature should be disabled.  */
  99 #define GRUB_TERM_NO_EDIT               (1 << 1)
 100 /* Set when the terminal cannot do fancy things.  */
 101 #define GRUB_TERM_DUMB                  (1 << 2)
 102 /* Which encoding does terminal expect stream to be.  */
 103 #define GRUB_TERM_CODE_TYPE_SHIFT       3
 104 #define GRUB_TERM_CODE_TYPE_MASK                (7 << GRUB_TERM_CODE_TYPE_SHIFT)
 105 /* Only ASCII characters accepted.  */
 106 #define GRUB_TERM_CODE_TYPE_ASCII               (0 << GRUB_TERM_CODE_TYPE_SHIFT)
 107 /* Expects CP-437 characters (ASCII + pseudographics).  */
 108 #define GRUB_TERM_CODE_TYPE_CP437                       (1 << GRUB_TERM_CODE_TYPE_SHIFT)
 109 /* UTF-8 stream in logical order. Usually used for terminals
 110    which just forward the stream to another computer.  */
 111 #define GRUB_TERM_CODE_TYPE_UTF8_LOGICAL        (2 << GRUB_TERM_CODE_TYPE_SHIFT)
 112 /* UTF-8 in visual order. Like UTF-8 logical but for buggy endpoints.  */
 113 #define GRUB_TERM_CODE_TYPE_UTF8_VISUAL         (3 << GRUB_TERM_CODE_TYPE_SHIFT)
 114 /* Glyph description in visual order.  */
 115 #define GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS       (4 << GRUB_TERM_CODE_TYPE_SHIFT)
 116
 117
 118 /* Bitmasks for modifier keys returned by grub_getkeystatus.  */
 119 #define GRUB_TERM_STATUS_RSHIFT (1 << 0)
 120 #define GRUB_TERM_STATUS_LSHIFT (1 << 1)
 121 #define GRUB_TERM_STATUS_RCTRL  (1 << 2)
 122 #define GRUB_TERM_STATUS_RALT   (1 << 3)
 123 #define GRUB_TERM_STATUS_SCROLL (1 << 4)
 124 #define GRUB_TERM_STATUS_NUM    (1 << 5)
 125 #define GRUB_TERM_STATUS_CAPS   (1 << 6)
 126 #define GRUB_TERM_STATUS_LCTRL  (1 << 8)
 127 #define GRUB_TERM_STATUS_LALT   (1 << 9)
 128
 129 /* Menu-related geometrical constants.  */
 130
 131 /* The number of columns/lines between messages/borders/etc.  */
 132 #define GRUB_TERM_MARGIN        1
 133
 134 /* The number of columns of scroll information.  */
 135 #define GRUB_TERM_SCROLL_WIDTH  1
 136
 137 struct grub_term_input
 138 {
 139   /* The next terminal.  */
 140   struct grub_term_input *next;
 141   struct grub_term_input **prev;
 142
 143   /* The terminal name.  */
 144   const char *name;
 145
 146   /* Initialize the terminal.  */
 147   grub_err_t (*init) (struct grub_term_input *term);
 148
 149   /* Clean up the terminal.  */
 150   grub_err_t (*fini) (struct grub_term_input *term);
 151
 152   /* Get a character if any input character is available. Otherwise return -1  */
 153   int (*getkey) (struct grub_term_input *term);
 154
 155   /* Get keyboard modifier status.  */
 156   int (*getkeystatus) (struct grub_term_input *term);
 157
 158   void *data;
 159 };
 160 typedef struct grub_term_input *grub_term_input_t;
 161
 162 /* Made in a way to fit into uint32_t and so be passed in a register.  */
 163 struct grub_term_coordinate
 164 {
 165   grub_uint16_t x;
 166   grub_uint16_t y;
 167 };
 168
 169 struct grub_term_output
 170 {
 171   /* The next terminal.  */
 172   struct grub_term_output *next;
 173   struct grub_term_output **prev;
 174
 175   /* The terminal name.  */
 176   const char *name;
 177
 178   /* Initialize the terminal.  */
 179   grub_err_t (*init) (struct grub_term_output *term);
 180
 181   /* Clean up the terminal.  */
 182   grub_err_t (*fini) (struct grub_term_output *term);
 183
 184   /* Put a character. C is encoded in Unicode.  */
 185   void (*putchar) (struct grub_term_output *term,
 186                    const struct grub_unicode_glyph *c);
 187
 188   /* Get the number of columns occupied by a given character C. C is
 189      encoded in Unicode.  */
 190   grub_size_t (*getcharwidth) (struct grub_term_output *term,
 191                                const struct grub_unicode_glyph *c);
 192
 193   /* Get the screen size.  */
 194   struct grub_term_coordinate (*getwh) (struct grub_term_output *term);
 195
 196   /* Get the cursor position. The return value is ((X << 8) | Y).  */
 197   struct grub_term_coordinate (*getxy) (struct grub_term_output *term);
 198
 199   /* Go to the position (X, Y).  */
 200   void (*gotoxy) (struct grub_term_output *term,
 201                   struct grub_term_coordinate pos);
 202
 203   /* Clear the screen.  */
 204   void (*cls) (struct grub_term_output *term);
 205
 206   /* Set the current color to be used */
 207   void (*setcolorstate) (struct grub_term_output *term,
 208                          grub_term_color_state state);
 209
 210   /* Turn on/off the cursor.  */
 211   void (*setcursor) (struct grub_term_output *term, int on);
 212
 213   /* Update the screen.  */
 214   void (*refresh) (struct grub_term_output *term);
 215
 216   /* gfxterm only: put in fullscreen mode.  */
 217   grub_err_t (*fullscreen) (void);
 218
 219   /* The feature flags defined above.  */
 220   grub_uint32_t flags;
 221
 222   /* Progress data. */
 223   grub_uint32_t progress_update_divisor;
 224   grub_uint32_t progress_update_counter;
 225
 226   void *data;
 227 };
 228 typedef struct grub_term_output *grub_term_output_t;
 229
 230 #define GRUB_TERM_DEFAULT_NORMAL_COLOR 0x07
 231 #define GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR 0x70
 232 #define GRUB_TERM_DEFAULT_STANDARD_COLOR 0x07
 233
 234 /* Current color state.  */
 235 extern grub_uint8_t EXPORT_VAR(grub_term_normal_color);
 236 extern grub_uint8_t EXPORT_VAR(grub_term_highlight_color);
 237
 238 extern struct grub_term_output *EXPORT_VAR(grub_term_outputs_disabled);
 239 extern struct grub_term_input *EXPORT_VAR(grub_term_inputs_disabled);
 240 extern struct grub_term_output *EXPORT_VAR(grub_term_outputs);
 241 extern struct grub_term_input *EXPORT_VAR(grub_term_inputs);
 242
 243 static inline void
 244 grub_term_register_input (const char *name __attribute__ ((unused)),
 245                           grub_term_input_t term)
 246 {
 247   if (grub_term_inputs)
 248     grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs_disabled),
 249                     GRUB_AS_LIST (term));
 250   else
 251     {
 252       /* If this is the first terminal, enable automatically.  */
 253       if (! term->init || term->init (term) == GRUB_ERR_NONE)
 254         grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs), GRUB_AS_LIST (term));
 255     }
 256 }
 257
 258 static inline void
 259 grub_term_register_input_inactive (const char *name __attribute__ ((unused)),
 260                                    grub_term_input_t term)
 261 {
 262   grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs_disabled),
 263                   GRUB_AS_LIST (term));
 264 }
 265
 266 static inline void
 267 grub_term_register_input_active (const char *name __attribute__ ((unused)),
 268                                  grub_term_input_t term)
 269 {
 270   if (! term->init || term->init (term) == GRUB_ERR_NONE)
 271     grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs), GRUB_AS_LIST (term));
 272 }
 273
 274 static inline void
 275 grub_term_register_output (const char *name __attribute__ ((unused)),
 276                            grub_term_output_t term)
 277 {
 278   if (grub_term_outputs)
 279     grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs_disabled),
 280                     GRUB_AS_LIST (term));
 281   else
 282     {
 283       /* If this is the first terminal, enable automatically.  */
 284       if (! term->init || term->init (term) == GRUB_ERR_NONE)
 285         grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs),
 286                         GRUB_AS_LIST (term));
 287     }
 288 }
 289
 290 static inline void
 291 grub_term_register_output_inactive (const char *name __attribute__ ((unused)),
 292                                     grub_term_output_t term)
 293 {
 294   grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs_disabled),
 295                   GRUB_AS_LIST (term));
 296 }
 297
 298 static inline void
 299 grub_term_register_output_active (const char *name __attribute__ ((unused)),
 300                                   grub_term_output_t term)
 301 {
 302   if (! term->init || term->init (term) == GRUB_ERR_NONE)
 303     grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs),
 304                     GRUB_AS_LIST (term));
 305 }
 306
 307 static inline void
 308 grub_term_unregister_input (grub_term_input_t term)
 309 {
 310   grub_list_remove (GRUB_AS_LIST (term));
 311   grub_list_remove (GRUB_AS_LIST (term));
 312 }
 313
 314 static inline void
 315 grub_term_unregister_output (grub_term_output_t term)
 316 {
 317   grub_list_remove (GRUB_AS_LIST (term));
 318   grub_list_remove (GRUB_AS_LIST (term));
 319 }
 320
 321 #define FOR_ACTIVE_TERM_INPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_inputs))
 322 #define FOR_DISABLED_TERM_INPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_inputs_disabled))
 323 #define FOR_ACTIVE_TERM_OUTPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_outputs))
 324 #define FOR_DISABLED_TERM_OUTPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_outputs_disabled))
 325
 326 void grub_putcode (grub_uint32_t code, struct grub_term_output *term);
 327 int EXPORT_FUNC(grub_getkey) (void);
 328 int EXPORT_FUNC(grub_getkey_noblock) (void);
 329 void grub_cls (void);
 330 void EXPORT_FUNC(grub_refresh) (void);
 331 void grub_puts_terminal (const char *str, struct grub_term_output *term);
 332 struct grub_term_coordinate *grub_term_save_pos (void);
 333 void grub_term_restore_pos (struct grub_term_coordinate *pos);
 334
 335 static inline unsigned grub_term_width (struct grub_term_output *term)
 336 {
 337   return term->getwh(term).x ? : 80;
 338 }
 339
 340 static inline unsigned grub_term_height (struct grub_term_output *term)
 341 {
 342   return term->getwh(term).y ? : 24;
 343 }
 344
 345 static inline struct grub_term_coordinate
 346 grub_term_getxy (struct grub_term_output *term)
 347 {
 348   return term->getxy (term);
 349 }
 350
 351 static inline void
 352 grub_term_refresh (struct grub_term_output *term)
 353 {
 354   if (term->refresh)
 355     term->refresh (term);
 356 }
 357
 358 static inline void
 359 grub_term_gotoxy (struct grub_term_output *term, struct grub_term_coordinate pos)
 360 {
 361   term->gotoxy (term, pos);
 362 }
 363
 364 static inline void
 365 grub_term_setcolorstate (struct grub_term_output *term,
 366                          grub_term_color_state state)
 367 {
 368   if (term->setcolorstate)
 369     term->setcolorstate (term, state);
 370 }
 371
 372 static inline void
 373 grub_setcolorstate (grub_term_color_state state)
 374 {
 375   struct grub_term_output *term;
 376
 377   FOR_ACTIVE_TERM_OUTPUTS(term)
 378     grub_term_setcolorstate (term, state);
 379 }
 380
 381 /* Turn on/off the cursor.  */
 382 static inline void
 383 grub_term_setcursor (struct grub_term_output *term, int on)
 384 {
 385   if (term->setcursor)
 386     term->setcursor (term, on);
 387 }
 388
 389 static inline void
 390 grub_term_cls (struct grub_term_output *term)
 391 {
 392   if (term->cls)
 393     (term->cls) (term);
 394   else
 395     {
 396       grub_putcode ('\n', term);
 397       grub_term_refresh (term);
 398     }
 399 }
 400
 401 #if HAVE_FONT_SOURCE
 402
 403 grub_size_t
 404 grub_unicode_estimate_width (const struct grub_unicode_glyph *c);
 405
 406 #else
 407
 408 static inline grub_size_t
 409 grub_unicode_estimate_width (const struct grub_unicode_glyph *c __attribute__ ((unused)))
 410 {
 411   if (grub_unicode_get_comb_type (c->base))
 412     return 0;
 413   return 1;
 414 }
 415
 416 #endif
 417
 418 #define GRUB_TERM_TAB_WIDTH 8
 419
 420 static inline grub_size_t
 421 grub_term_getcharwidth (struct grub_term_output *term,
 422                         const struct grub_unicode_glyph *c)
 423 {
 424   if (c->base == '\t')
 425     return GRUB_TERM_TAB_WIDTH;
 426
 427   if (term->getcharwidth)
 428     return term->getcharwidth (term, c);
 429   else if (((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 430             == GRUB_TERM_CODE_TYPE_UTF8_LOGICAL)
 431            || ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 432                == GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
 433            || ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 434                == GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS))
 435     return grub_unicode_estimate_width (c);
 436   else
 437     return 1;
 438 }
 439
 440 struct grub_term_autoload
 441 {
 442   struct grub_term_autoload *next;
 443   char *name;
 444   char *modname;
 445 };
 446
 447 extern struct grub_term_autoload *grub_term_input_autoload;
 448 extern struct grub_term_autoload *grub_term_output_autoload;
 449
 450 static inline void
 451 grub_print_spaces (struct grub_term_output *term, int number_spaces)
 452 {
 453   while (--number_spaces >= 0)
 454     grub_putcode (' ', term);
 455 }
 456
 457 extern void (*EXPORT_VAR (grub_term_poll_usb)) (int wait_for_completion);
 458
 459 #define GRUB_TERM_REPEAT_PRE_INTERVAL 400
 460 #define GRUB_TERM_REPEAT_INTERVAL 50
 461
 462 #endif /* ! ASM_FILE */
 463
 464 #endif /* ! GRUB_TERM_HEADER */