GRUB2/MOD_SRC/grub-2.04/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 /* Hex value is used for ESC, since '\e' is nonstandard */
  59 #define GRUB_TERM_ESC           0x1b
  60 #define GRUB_TERM_TAB           '\t'
  61 #define GRUB_TERM_BACKSPACE     '\b'
  62
  63 #define GRUB_PROGRESS_NO_UPDATE -1
  64 #define GRUB_PROGRESS_FAST      0
  65 #define GRUB_PROGRESS_SLOW      2
  66
  67 #ifndef ASM_FILE
  68
  69 #include <grub/err.h>
  70 #include <grub/symbol.h>
  71 #include <grub/types.h>
  72 #include <grub/unicode.h>
  73 #include <grub/list.h>
  74
  75 /* These are used to represent the various color states we use.  */
  76 typedef enum
  77   {
  78     /* The color used to display all text that does not use the
  79        user defined colors below.  */
  80     GRUB_TERM_COLOR_STANDARD,
  81     /* The user defined colors for normal text.  */
  82     GRUB_TERM_COLOR_NORMAL,
  83     /* The user defined colors for highlighted text.  */
  84     GRUB_TERM_COLOR_HIGHLIGHT
  85   }
  86 grub_term_color_state;
  87
  88 /* Flags for representing the capabilities of a terminal.  */
  89 /* Some notes about the flags:
  90    - These flags are used by higher-level functions but not terminals
  91    themselves.
  92    - If a terminal is dumb, you may assume that only putchar, getkey and
  93    checkkey are called.
  94    - Some fancy features (setcolorstate, setcolor and setcursor) can be set
  95    to NULL.  */
  96
  97 /* Set when input characters shouldn't be echoed back.  */
  98 #define GRUB_TERM_NO_ECHO               (1 << 0)
  99 /* Set when the editing feature should be disabled.  */
 100 #define GRUB_TERM_NO_EDIT               (1 << 1)
 101 /* Set when the terminal cannot do fancy things.  */
 102 #define GRUB_TERM_DUMB                  (1 << 2)
 103 /* Which encoding does terminal expect stream to be.  */
 104 #define GRUB_TERM_CODE_TYPE_SHIFT       3
 105 #define GRUB_TERM_CODE_TYPE_MASK                (7 << GRUB_TERM_CODE_TYPE_SHIFT)
 106 /* Only ASCII characters accepted.  */
 107 #define GRUB_TERM_CODE_TYPE_ASCII               (0 << GRUB_TERM_CODE_TYPE_SHIFT)
 108 /* Expects CP-437 characters (ASCII + pseudographics).  */
 109 #define GRUB_TERM_CODE_TYPE_CP437                       (1 << GRUB_TERM_CODE_TYPE_SHIFT)
 110 /* UTF-8 stream in logical order. Usually used for terminals
 111    which just forward the stream to another computer.  */
 112 #define GRUB_TERM_CODE_TYPE_UTF8_LOGICAL        (2 << GRUB_TERM_CODE_TYPE_SHIFT)
 113 /* UTF-8 in visual order. Like UTF-8 logical but for buggy endpoints.  */
 114 #define GRUB_TERM_CODE_TYPE_UTF8_VISUAL         (3 << GRUB_TERM_CODE_TYPE_SHIFT)
 115 /* Glyph description in visual order.  */
 116 #define GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS       (4 << GRUB_TERM_CODE_TYPE_SHIFT)
 117
 118
 119 /* Bitmasks for modifier keys returned by grub_getkeystatus.  */
 120 #define GRUB_TERM_STATUS_RSHIFT (1 << 0)
 121 #define GRUB_TERM_STATUS_LSHIFT (1 << 1)
 122 #define GRUB_TERM_STATUS_RCTRL  (1 << 2)
 123 #define GRUB_TERM_STATUS_RALT   (1 << 3)
 124 #define GRUB_TERM_STATUS_SCROLL (1 << 4)
 125 #define GRUB_TERM_STATUS_NUM    (1 << 5)
 126 #define GRUB_TERM_STATUS_CAPS   (1 << 6)
 127 #define GRUB_TERM_STATUS_LCTRL  (1 << 8)
 128 #define GRUB_TERM_STATUS_LALT   (1 << 9)
 129
 130 /* Menu-related geometrical constants.  */
 131
 132 /* The number of columns/lines between messages/borders/etc.  */
 133 #define GRUB_TERM_MARGIN        1
 134
 135 /* The number of columns of scroll information.  */
 136 #define GRUB_TERM_SCROLL_WIDTH  1
 137
 138 struct grub_term_input
 139 {
 140   /* The next terminal.  */
 141   struct grub_term_input *next;
 142   struct grub_term_input **prev;
 143
 144   /* The terminal name.  */
 145   const char *name;
 146
 147   /* Initialize the terminal.  */
 148   grub_err_t (*init) (struct grub_term_input *term);
 149
 150   /* Clean up the terminal.  */
 151   grub_err_t (*fini) (struct grub_term_input *term);
 152
 153   /* Get a character if any input character is available. Otherwise return -1  */
 154   int (*getkey) (struct grub_term_input *term);
 155
 156   /* Get keyboard modifier status.  */
 157   int (*getkeystatus) (struct grub_term_input *term);
 158
 159   void *data;
 160 };
 161 typedef struct grub_term_input *grub_term_input_t;
 162
 163 /* Made in a way to fit into uint32_t and so be passed in a register.  */
 164 struct grub_term_coordinate
 165 {
 166   grub_uint16_t x;
 167   grub_uint16_t y;
 168 };
 169
 170 struct grub_term_output
 171 {
 172   /* The next terminal.  */
 173   struct grub_term_output *next;
 174   struct grub_term_output **prev;
 175
 176   /* The terminal name.  */
 177   const char *name;
 178
 179   /* Initialize the terminal.  */
 180   grub_err_t (*init) (struct grub_term_output *term);
 181
 182   /* Clean up the terminal.  */
 183   grub_err_t (*fini) (struct grub_term_output *term);
 184
 185   /* Put a character. C is encoded in Unicode.  */
 186   void (*putchar) (struct grub_term_output *term,
 187                    const struct grub_unicode_glyph *c);
 188
 189   /* Get the number of columns occupied by a given character C. C is
 190      encoded in Unicode.  */
 191   grub_size_t (*getcharwidth) (struct grub_term_output *term,
 192                                const struct grub_unicode_glyph *c);
 193
 194   /* Get the screen size.  */
 195   struct grub_term_coordinate (*getwh) (struct grub_term_output *term);
 196
 197   /* Get the cursor position. The return value is ((X << 8) | Y).  */
 198   struct grub_term_coordinate (*getxy) (struct grub_term_output *term);
 199
 200   /* Go to the position (X, Y).  */
 201   void (*gotoxy) (struct grub_term_output *term,
 202                   struct grub_term_coordinate pos);
 203
 204   /* Clear the screen.  */
 205   void (*cls) (struct grub_term_output *term);
 206
 207   /* Set the current color to be used */
 208   void (*setcolorstate) (struct grub_term_output *term,
 209                          grub_term_color_state state);
 210
 211   /* Turn on/off the cursor.  */
 212   void (*setcursor) (struct grub_term_output *term, int on);
 213
 214   /* Update the screen.  */
 215   void (*refresh) (struct grub_term_output *term);
 216
 217   /* gfxterm only: put in fullscreen mode.  */
 218   grub_err_t (*fullscreen) (void);
 219
 220   /* The feature flags defined above.  */
 221   grub_uint32_t flags;
 222
 223   /* Progress data. */
 224   grub_uint32_t progress_update_divisor;
 225   grub_uint32_t progress_update_counter;
 226
 227   void *data;
 228 };
 229 typedef struct grub_term_output *grub_term_output_t;
 230
 231 #define GRUB_TERM_DEFAULT_NORMAL_COLOR 0x07
 232 #define GRUB_TERM_DEFAULT_HIGHLIGHT_COLOR 0x70
 233 #define GRUB_TERM_DEFAULT_STANDARD_COLOR 0x07
 234
 235 /* Current color state.  */
 236 extern grub_uint8_t EXPORT_VAR(grub_term_normal_color);
 237 extern grub_uint8_t EXPORT_VAR(grub_term_highlight_color);
 238
 239 extern struct grub_term_output *EXPORT_VAR(grub_term_outputs_disabled);
 240 extern struct grub_term_input *EXPORT_VAR(grub_term_inputs_disabled);
 241 extern struct grub_term_output *EXPORT_VAR(grub_term_outputs);
 242 extern struct grub_term_input *EXPORT_VAR(grub_term_inputs);
 243
 244 static inline void
 245 grub_term_register_input (const char *name __attribute__ ((unused)),
 246                           grub_term_input_t term)
 247 {
 248   if (grub_term_inputs)
 249     grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs_disabled),
 250                     GRUB_AS_LIST (term));
 251   else
 252     {
 253       /* If this is the first terminal, enable automatically.  */
 254       if (! term->init || term->init (term) == GRUB_ERR_NONE)
 255         grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs), GRUB_AS_LIST (term));
 256     }
 257 }
 258
 259 static inline void
 260 grub_term_register_input_inactive (const char *name __attribute__ ((unused)),
 261                                    grub_term_input_t term)
 262 {
 263   grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs_disabled),
 264                   GRUB_AS_LIST (term));
 265 }
 266
 267 static inline void
 268 grub_term_register_input_active (const char *name __attribute__ ((unused)),
 269                                  grub_term_input_t term)
 270 {
 271   if (! term->init || term->init (term) == GRUB_ERR_NONE)
 272     grub_list_push (GRUB_AS_LIST_P (&grub_term_inputs), GRUB_AS_LIST (term));
 273 }
 274
 275 static inline void
 276 grub_term_register_output (const char *name __attribute__ ((unused)),
 277                            grub_term_output_t term)
 278 {
 279   if (grub_term_outputs)
 280     grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs_disabled),
 281                     GRUB_AS_LIST (term));
 282   else
 283     {
 284       /* If this is the first terminal, enable automatically.  */
 285       if (! term->init || term->init (term) == GRUB_ERR_NONE)
 286         grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs),
 287                         GRUB_AS_LIST (term));
 288     }
 289 }
 290
 291 static inline void
 292 grub_term_register_output_inactive (const char *name __attribute__ ((unused)),
 293                                     grub_term_output_t term)
 294 {
 295   grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs_disabled),
 296                   GRUB_AS_LIST (term));
 297 }
 298
 299 static inline void
 300 grub_term_register_output_active (const char *name __attribute__ ((unused)),
 301                                   grub_term_output_t term)
 302 {
 303   if (! term->init || term->init (term) == GRUB_ERR_NONE)
 304     grub_list_push (GRUB_AS_LIST_P (&grub_term_outputs),
 305                     GRUB_AS_LIST (term));
 306 }
 307
 308 static inline void
 309 grub_term_unregister_input (grub_term_input_t term)
 310 {
 311   grub_list_remove (GRUB_AS_LIST (term));
 312   grub_list_remove (GRUB_AS_LIST (term));
 313 }
 314
 315 static inline void
 316 grub_term_unregister_output (grub_term_output_t term)
 317 {
 318   grub_list_remove (GRUB_AS_LIST (term));
 319   grub_list_remove (GRUB_AS_LIST (term));
 320 }
 321
 322 #define FOR_ACTIVE_TERM_INPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_inputs))
 323 #define FOR_DISABLED_TERM_INPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_inputs_disabled))
 324 #define FOR_ACTIVE_TERM_OUTPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_outputs))
 325 #define FOR_DISABLED_TERM_OUTPUTS(var) FOR_LIST_ELEMENTS((var), (grub_term_outputs_disabled))
 326
 327 void grub_putcode (grub_uint32_t code, struct grub_term_output *term);
 328 int EXPORT_FUNC(grub_getkey) (void);
 329 int EXPORT_FUNC(grub_getkey_noblock) (void);
 330 extern int (*EXPORT_VAR (grub_key_remap))(int key);
 331 void grub_cls (void);
 332 void EXPORT_FUNC(grub_refresh) (void);
 333 void grub_puts_terminal (const char *str, struct grub_term_output *term);
 334 struct grub_term_coordinate *grub_term_save_pos (void);
 335 void grub_term_restore_pos (struct grub_term_coordinate *pos);
 336
 337 static inline unsigned grub_term_width (struct grub_term_output *term)
 338 {
 339   return term->getwh(term).x ? : 80;
 340 }
 341
 342 static inline unsigned grub_term_height (struct grub_term_output *term)
 343 {
 344   return term->getwh(term).y ? : 24;
 345 }
 346
 347 static inline struct grub_term_coordinate
 348 grub_term_getxy (struct grub_term_output *term)
 349 {
 350   return term->getxy (term);
 351 }
 352
 353 static inline void
 354 grub_term_refresh (struct grub_term_output *term)
 355 {
 356   if (term->refresh)
 357     term->refresh (term);
 358 }
 359
 360 static inline void
 361 grub_term_gotoxy (struct grub_term_output *term, struct grub_term_coordinate pos)
 362 {
 363   term->gotoxy (term, pos);
 364 }
 365
 366 static inline void
 367 grub_term_setcolorstate (struct grub_term_output *term,
 368                          grub_term_color_state state)
 369 {
 370   if (term->setcolorstate)
 371     term->setcolorstate (term, state);
 372 }
 373
 374 static inline void
 375 grub_setcolorstate (grub_term_color_state state)
 376 {
 377   struct grub_term_output *term;
 378
 379   FOR_ACTIVE_TERM_OUTPUTS(term)
 380     grub_term_setcolorstate (term, state);
 381 }
 382
 383 /* Turn on/off the cursor.  */
 384 static inline void
 385 grub_term_setcursor (struct grub_term_output *term, int on)
 386 {
 387   if (term->setcursor)
 388     term->setcursor (term, on);
 389 }
 390
 391 static inline void
 392 grub_term_cls (struct grub_term_output *term)
 393 {
 394   if (term->cls)
 395     (term->cls) (term);
 396   else
 397     {
 398       grub_putcode ('\n', term);
 399       grub_term_refresh (term);
 400     }
 401 }
 402
 403 #if HAVE_FONT_SOURCE
 404
 405 grub_size_t
 406 grub_unicode_estimate_width (const struct grub_unicode_glyph *c);
 407
 408 #else
 409
 410 static inline grub_size_t
 411 grub_unicode_estimate_width (const struct grub_unicode_glyph *c __attribute__ ((unused)))
 412 {
 413   if (grub_unicode_get_comb_type (c->base))
 414     return 0;
 415   return 1;
 416 }
 417
 418 #endif
 419
 420 #define GRUB_TERM_TAB_WIDTH 8
 421
 422 static inline grub_size_t
 423 grub_term_getcharwidth (struct grub_term_output *term,
 424                         const struct grub_unicode_glyph *c)
 425 {
 426   if (c->base == '\t')
 427     return GRUB_TERM_TAB_WIDTH;
 428
 429   if (term->getcharwidth)
 430     return term->getcharwidth (term, c);
 431   else if (((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 432             == GRUB_TERM_CODE_TYPE_UTF8_LOGICAL)
 433            || ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 434                == GRUB_TERM_CODE_TYPE_UTF8_VISUAL)
 435            || ((term->flags & GRUB_TERM_CODE_TYPE_MASK)
 436                == GRUB_TERM_CODE_TYPE_VISUAL_GLYPHS))
 437     return grub_unicode_estimate_width (c);
 438   else
 439     return 1;
 440 }
 441
 442 struct grub_term_autoload
 443 {
 444   struct grub_term_autoload *next;
 445   char *name;
 446   char *modname;
 447 };
 448
 449 extern struct grub_term_autoload *grub_term_input_autoload;
 450 extern struct grub_term_autoload *grub_term_output_autoload;
 451
 452 static inline void
 453 grub_print_spaces (struct grub_term_output *term, int number_spaces)
 454 {
 455   while (--number_spaces >= 0)
 456     grub_putcode (' ', term);
 457 }
 458
 459 extern void (*EXPORT_VAR (grub_term_poll_usb)) (int wait_for_completion);
 460
 461 #define GRUB_TERM_REPEAT_PRE_INTERVAL 400
 462 #define GRUB_TERM_REPEAT_INTERVAL 50
 463
 464 #endif /* ! ASM_FILE */
 465
 466 #endif /* ! GRUB_TERM_HEADER */