code.delx.au - gnu-emacs/blob - src/termhooks.h

   1 /* Parameters and display hooks for output devices.
   2    Copyright (C) 1985, 1986, 1993, 1994, 2002, 2003, 2004,
   3                  2005 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 \f
  23 /* Miscellanea.   */
  24
  25 struct glyph;
  26 struct frame;
  27
  28 /* Only use prototypes when lisp.h has been included.  */
  29 #ifndef P_
  30 #define P_(X) ()
  31 #endif
  32 \f
  33
  34 enum scroll_bar_part {
  35   scroll_bar_above_handle,
  36   scroll_bar_handle,
  37   scroll_bar_below_handle,
  38   scroll_bar_up_arrow,
  39   scroll_bar_down_arrow,
  40   scroll_bar_to_top,
  41   scroll_bar_to_bottom,
  42   scroll_bar_end_scroll,
  43   scroll_bar_move_ratio
  44 };
  45
  46 \f
  47 /* Input queue declarations and hooks.  */
  48
  49 /* Expedient hack: only provide the below definitions to files that
  50    are prepared to handle lispy things.  CONSP is defined iff lisp.h
  51    has been included before this file.  */
  52 #ifdef CONSP
  53
  54 enum event_kind
  55 {
  56   NO_EVENT,                     /* nothing happened.  This should never
  57                                    actually appear in the event queue.  */
  58
  59   ASCII_KEYSTROKE_EVENT,        /* The ASCII code is in .code, perhaps
  60                                    with modifiers applied.
  61                                    .modifiers holds the state of the
  62                                    modifier keys.
  63                                    .frame_or_window is the frame in
  64                                    which the key was typed.
  65                                    .timestamp gives a timestamp (in
  66                                    milliseconds) for the keystroke.  */
  67   MULTIBYTE_CHAR_KEYSTROKE_EVENT,       /* The multibyte char code is in .code,
  68                                    perhaps with modifiers applied.
  69                                    The others are the same as
  70                                    ASCII_KEYSTROKE_EVENT.  */
  71   NON_ASCII_KEYSTROKE_EVENT,    /* .code is a number identifying the
  72                                    function key.  A code N represents
  73                                    a key whose name is
  74                                    function_key_names[N]; function_key_names
  75                                    is a table in keyboard.c to which you
  76                                    should feel free to add missing keys.
  77                                    .modifiers holds the state of the
  78                                    modifier keys.
  79                                    .frame_or_window is the frame in
  80                                    which the key was typed.
  81                                    .timestamp gives a timestamp (in
  82                                    milliseconds) for the keystroke.  */
  83   TIMER_EVENT,                  /* A timer fired.  */
  84   MOUSE_CLICK_EVENT,            /* The button number is in .code; it must
  85                                    be >= 0 and < NUM_MOUSE_BUTTONS, defined
  86                                    below.
  87                                    .modifiers holds the state of the
  88                                    modifier keys.
  89                                    .x and .y give the mouse position,
  90                                    in characters, within the window.
  91                                    .frame_or_window gives the frame
  92                                    the mouse click occurred in.
  93                                    .timestamp gives a timestamp (in
  94                                    milliseconds) for the click.  */
  95   WHEEL_EVENT,                  /* A wheel event is generated by a
  96                                    wheel on a mouse (e.g., MS
  97                                    Intellimouse).
  98                                    .modifiers holds the rotate
  99                                    direction (up or down), and the
 100                                    state of the modifier keys.
 101                                    .x and .y give the mouse position,
 102                                    in characters, within the window.
 103                                    .frame_or_window gives the frame
 104                                    the wheel event occurred in.
 105                                    .timestamp gives a timestamp (in
 106                                    milliseconds) for the event.  */
 107 #if defined (WINDOWSNT) || defined (MAC_OS)
 108   LANGUAGE_CHANGE_EVENT,        /* A LANGUAGE_CHANGE_EVENT is
 109                                    generated on WINDOWSNT or Mac OS
 110                                    when the keyboard layout or input
 111                                    language is changed by the
 112                                    user.  */
 113 #endif
 114   SCROLL_BAR_CLICK_EVENT,       /* .code gives the number of the mouse button
 115                                    that was clicked.
 116                                    .modifiers holds the state of the modifier
 117                                    keys.
 118                                    .part is a lisp symbol indicating which
 119                                    part of the scroll bar got clicked.
 120                                    .x gives the distance from the start of the
 121                                    scroll bar of the click; .y gives the total
 122                                    length of the scroll bar.
 123                                    .frame_or_window gives the window
 124                                    whose scroll bar was clicked in.
 125                                    .timestamp gives a timestamp (in
 126                                    milliseconds) for the click.  */
 127 #ifdef WINDOWSNT
 128   W32_SCROLL_BAR_CLICK_EVENT,   /* as for SCROLL_BAR_CLICK, but only generated
 129                                    by MS-Windows scroll bar controls. */
 130 #endif
 131   SELECTION_REQUEST_EVENT,      /* Another X client wants a selection from us.
 132                                    See `struct selection_event'.  */
 133   SELECTION_CLEAR_EVENT,        /* Another X client cleared our selection.  */
 134   BUFFER_SWITCH_EVENT,          /* A process filter has switched buffers.  */
 135   DELETE_WINDOW_EVENT,          /* An X client said "delete this window".  */
 136   MENU_BAR_EVENT,               /* An event generated by the menu bar.
 137                                    The frame_or_window field's cdr holds the
 138                                    Lisp-level event value.
 139                                    (Only the toolkit version uses these.)  */
 140   ICONIFY_EVENT,                /* An X client iconified this window.  */
 141   DEICONIFY_EVENT,              /* An X client deiconified this window.  */
 142   MENU_BAR_ACTIVATE_EVENT,      /* A button press in the menu bar
 143                                    (toolkit version only).  */
 144   DRAG_N_DROP_EVENT,            /* A drag-n-drop event is generated when
 145                                    files selected outside of Emacs are dropped
 146                                    onto an Emacs window.
 147                                    Currently used only on Windows NT.
 148                                    .modifiers holds the state of the
 149                                    modifier keys.
 150                                    .x and .y give the mouse position,
 151                                    in characters, within the window.
 152                                    .frame_or_window is a cons of the frame
 153                                    in which the drop was made and a list of
 154                                    the filenames of the dropped files.
 155                                    .timestamp gives a timestamp (in
 156                                    milliseconds) for the click.  */
 157   USER_SIGNAL_EVENT,            /* A user signal.
 158                                    code is a number identifying it,
 159                                    index into lispy_user_signals.  */
 160
 161   /* Help events.  Member `frame_or_window' of the input_event is the
 162      frame on which the event occurred, and member `arg' contains
 163      the help to show.  */
 164   HELP_EVENT,
 165
 166   /* An event from a tool-bar.  Member `arg' of the input event
 167      contains the tool-bar item selected.  If `frame_or_window'
 168      and `arg' are equal, this is a prefix event.  */
 169   TOOL_BAR_EVENT,
 170
 171   /* Queued from XTread_socket on FocusIn events.  Translated into
 172      `switch-frame' events in kbd_buffer_get_event, if necessary.  */
 173   FOCUS_IN_EVENT,
 174
 175   /* Generated when mouse moves over window not currently selected.  */
 176   SELECT_WINDOW_EVENT,
 177
 178   /* Queued from XTread_socket when session manager sends
 179      save yourself before shutdown. */
 180   SAVE_SESSION_EVENT
 181 };
 182
 183 /* If a struct input_event has a kind which is SELECTION_REQUEST_EVENT
 184    or SELECTION_CLEAR_EVENT, then its contents are really described
 185    by `struct selection_event'; see xterm.h.  */
 186
 187 /* The keyboard input buffer is an array of these structures.  Each one
 188    represents some sort of input event - a keystroke, a mouse click, or
 189    a window system event.  These get turned into their lispy forms when
 190    they are removed from the event queue.  */
 191
 192 struct input_event
 193 {
 194   /* What kind of event was this?  */
 195   enum event_kind kind;
 196
 197   /* For an ASCII_KEYSTROKE_EVENT and MULTIBYTE_CHAR_KEYSTROKE_EVENT,
 198      this is the character.
 199      For a NON_ASCII_KEYSTROKE_EVENT, this is the keysym code.
 200      For a mouse event, this is the button number.  */
 201   /* In WindowsNT, for a mouse wheel event, this is the delta.  */
 202   int code;
 203   enum scroll_bar_part part;
 204
 205   int modifiers;                /* See enum below for interpretation.  */
 206
 207   Lisp_Object x, y;
 208   unsigned long timestamp;
 209
 210   /* This is padding just to put the frame_or_window field
 211      past the size of struct selection_event.  */
 212   int *padding[2];
 213
 214   /* This field is copied into a vector while the event is in the queue,
 215      so that garbage collections won't kill it.  */
 216   /* In a menu_bar_event, this is a cons cell whose car is the frame
 217      and whose cdr is the Lisp object that is the event's value.  */
 218   /* This field is last so that struct selection_input_event
 219      does not overlap with it.  */
 220   Lisp_Object frame_or_window;
 221
 222   /* Additional event argument.  This is used for TOOL_BAR_EVENTs and
 223      HELP_EVENTs and avoids calling Fcons during signal handling.  */
 224   Lisp_Object arg;
 225 };
 226
 227 #define EVENT_INIT(event) bzero (&(event), sizeof (struct input_event))
 228
 229 /* Bits in the modifiers member of the input_event structure.
 230    Note that reorder_modifiers assumes that the bits are in canonical
 231    order.
 232
 233    The modifiers applied to mouse clicks are rather ornate.  The
 234    window-system-specific code should store mouse clicks with
 235    up_modifier or down_modifier set.  Having an explicit down modifier
 236    simplifies some of window-system-independent code; without it, the
 237    code would have to recognize down events by checking if the event
 238    is a mouse click lacking the click and drag modifiers.
 239
 240    The window-system independent code turns all up_modifier events
 241    bits into drag_modifier, click_modifier, double_modifier, or
 242    triple_modifier events.  The click_modifier has no written
 243    representation in the names of the symbols used as event heads,
 244    but it does appear in the Qevent_symbol_components property of the
 245    event heads.  */
 246 enum {
 247   up_modifier   =   1,          /* Only used on mouse buttons - always
 248                                    turned into a click or a drag modifier
 249                                    before lisp code sees the event.  */
 250   down_modifier =   2,          /* Only used on mouse buttons.  */
 251   drag_modifier =   4,          /* This is never used in the event
 252                                    queue; it's only used internally by
 253                                    the window-system-independent code.  */
 254   click_modifier=   8,          /* See drag_modifier.  */
 255   double_modifier= 16,          /* See drag_modifier.  */
 256   triple_modifier= 32,          /* See drag_modifier.  */
 257
 258   /* The next four modifier bits are used also in keyboard events at
 259      the Lisp level.
 260
 261      It's probably not the greatest idea to use the 2^23 bit for any
 262      modifier.  It may or may not be the sign bit, depending on
 263      VALBITS, so using it to represent a modifier key means that
 264      characters thus modified have different integer equivalents
 265      depending on the architecture they're running on.  Oh, and
 266      applying XINT to a character whose 2^23 bit is set sign-extends
 267      it, so you get a bunch of bits in the mask you didn't want.
 268
 269      The CHAR_ macros are defined in lisp.h.  */
 270   alt_modifier  =  CHAR_ALT,    /* Under X, the XK_Alt_[LR] keysyms.  */
 271   super_modifier=  CHAR_SUPER,  /* Under X, the XK_Super_[LR] keysyms.  */
 272   hyper_modifier=  CHAR_HYPER,  /* Under X, the XK_Hyper_[LR] keysyms.  */
 273   shift_modifier=  CHAR_SHIFT,
 274   ctrl_modifier =  CHAR_CTL,
 275   meta_modifier =  CHAR_META    /* Under X, the XK_Meta_[LR] keysyms.  */
 276 };
 277
 278 #endif /* CONSP */
 279
 280 \f
 281 /* Device-local parameters. */
 282 struct device
 283 {
 284   /* Chain of all display devices. */
 285   struct device *next_device;
 286
 287   /* Unique id for this display device. */
 288   int id;
 289
 290   /* The number of frames that are on this device. */
 291   int reference_count;
 292
 293   /* The type of the display device. */
 294   enum output_method type;
 295
 296   /* The name of the display device.  Do not use this to identify the device. */
 297   char *name;
 298
 299 #ifdef MULTI_KBOARD
 300   /* The device's keyboard object. */
 301   struct kboard *kboard;
 302 #endif
 303
 304   /* Device-type dependent data shared amongst all frames on this display. */
 305   union display_info
 306   {
 307     struct tty_display_info *tty;     /* termchar.h */
 308     struct x_display_info *x;         /* xterm.h */
 309   } display_info;
 310
 311 \f
 312   /* Coding-system to be used for encoding terminal output.  This
 313      structure contains information of a coding-system specified by
 314      the function `set-terminal-coding-system'.  Also see
 315      `safe_terminal_coding' in coding.h.  */
 316   struct coding_system *terminal_coding;
 317
 318   /* Coding-system of what is sent from terminal keyboard.  This
 319      structure contains information of a coding-system specified by
 320      the function `set-keyboard-coding-system'.  */
 321   struct coding_system *keyboard_coding;
 322
 323   /* Terminal characteristics. */
 324   /* XXX Are these really used on non-termcap displays? */
 325
 326   int must_write_spaces;        /* Nonzero means spaces in the text must
 327                                    actually be output; can't just skip over
 328                                    some columns to leave them blank.  */
 329   int fast_clear_end_of_line;   /* Nonzero means terminal has a `ce' string */
 330
 331   int line_ins_del_ok;          /* Terminal can insert and delete lines */
 332   int char_ins_del_ok;          /* Terminal can insert and delete chars */
 333   int scroll_region_ok;         /* Terminal supports setting the scroll
 334                                    window */
 335   int scroll_region_cost;       /* Cost of setting the scroll window,
 336                                    measured in characters. */
 337   int memory_below_frame;       /* Terminal remembers lines scrolled
 338                                    off bottom */
 339
 340 #if 0  /* These are not used anywhere. */
 341   /* EMACS_INT baud_rate; */    /* Output speed in baud */
 342   int min_padding_speed;        /* Speed below which no padding necessary. */
 343   int dont_calculate_costs;     /* Nonzero means don't bother computing
 344                                    various cost tables; we won't use them. */
 345 #endif
 346
 347 \f
 348   /* Window-based redisplay interface for this device (0 for tty
 349      devices). */
 350   struct redisplay_interface *rif;
 351
 352   /* Frame-based redisplay interface. */
 353
 354   /* Text display hooks.  */
 355
 356   void (*cursor_to_hook) P_ ((struct frame *f, int vpos, int hpos));
 357   void (*raw_cursor_to_hook) P_ ((struct frame *, int, int));
 358
 359   void (*clear_to_end_hook) P_ ((struct frame *));
 360   void (*clear_frame_hook) P_ ((struct frame *));
 361   void (*clear_end_of_line_hook) P_ ((struct frame *, int));
 362
 363   void (*ins_del_lines_hook) P_ ((struct frame *f, int, int));
 364
 365   void (*insert_glyphs_hook) P_ ((struct frame *f, struct glyph *s, int n));
 366   void (*write_glyphs_hook) P_ ((struct frame *f, struct glyph *s, int n));
 367   void (*delete_glyphs_hook) P_ ((struct frame *, int));
 368
 369   void (*ring_bell_hook) P_ ((struct frame *f));
 370
 371   void (*reset_terminal_modes_hook) P_ ((struct device *));
 372   void (*set_terminal_modes_hook) P_ ((struct device *));
 373
 374   void (*update_begin_hook) P_ ((struct frame *));
 375   void (*update_end_hook) P_ ((struct frame *));
 376   void (*set_terminal_window_hook) P_ ((struct frame *, int));
 377
 378   /* Multi-frame and mouse support hooks.  */
 379
 380   /* Return the current position of the mouse.
 381
 382      Set *f to the frame the mouse is in, or zero if the mouse is in no
 383      Emacs frame.  If it is set to zero, all the other arguments are
 384      garbage.
 385
 386      If the motion started in a scroll bar, set *bar_window to the
 387      scroll bar's window, *part to the part the mouse is currently over,
 388      *x to the position of the mouse along the scroll bar, and *y to the
 389      overall length of the scroll bar.
 390
 391      Otherwise, set *bar_window to Qnil, and *x and *y to the column and
 392      row of the character cell the mouse is over.
 393
 394      Set *time to the time the mouse was at the returned position.
 395
 396      This should clear mouse_moved until the next motion
 397      event arrives.  */
 398   void (*mouse_position_hook) P_ ((struct frame **f, int,
 399                                    Lisp_Object *bar_window,
 400                                    enum scroll_bar_part *part,
 401                                    Lisp_Object *x,
 402                                    Lisp_Object *y,
 403                                    unsigned long *time));
 404
 405   /* The window system handling code should set this if the mouse has
 406      moved since the last call to the mouse_position_hook.  Calling that
 407      hook should clear this.  */
 408   int mouse_moved;
 409
 410   /* When a frame's focus redirection is changed, this hook tells the
 411      window system code to re-decide where to put the highlight.  Under
 412      X, this means that Emacs lies about where the focus is.  */
 413   void (*frame_rehighlight_hook) P_ ((struct frame *));
 414
 415   /* If we're displaying frames using a window system that can stack
 416      frames on top of each other, this hook allows you to bring a frame
 417      to the front, or bury it behind all the other windows.  If this
 418      hook is zero, that means the device we're displaying on doesn't
 419      support overlapping frames, so there's no need to raise or lower
 420      anything.
 421
 422      If RAISE is non-zero, F is brought to the front, before all other
 423      windows.  If RAISE is zero, F is sent to the back, behind all other
 424      windows.  */
 425   void (*frame_raise_lower_hook) P_ ((struct frame *f, int raise));
 426
 427   \f
 428   /* Scroll bar hooks.  */
 429
 430   /* The representation of scroll bars is determined by the code which
 431      implements them, except for one thing: they must be represented by
 432      lisp objects.  This allows us to place references to them in
 433      Lisp_Windows without worrying about those references becoming
 434      dangling references when the scroll bar is destroyed.
 435
 436      The window-system-independent portion of Emacs just refers to
 437      scroll bars via their windows, and never looks inside the scroll bar
 438      representation; it always uses hook functions to do all the
 439      scroll bar manipulation it needs.
 440
 441      The `vertical_scroll_bar' field of a Lisp_Window refers to that
 442      window's scroll bar, or is nil if the window doesn't have a
 443      scroll bar.
 444
 445      The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame
 446      are free for use by the scroll bar implementation in any way it sees
 447      fit.  They are marked by the garbage collector.  */
 448
 449
 450   /* Set the vertical scroll bar for WINDOW to have its upper left corner
 451      at (TOP, LEFT), and be LENGTH rows high.  Set its handle to
 452      indicate that we are displaying PORTION characters out of a total
 453      of WHOLE characters, starting at POSITION.  If WINDOW doesn't yet
 454      have a scroll bar, create one for it.  */
 455   void (*set_vertical_scroll_bar_hook) P_ ((struct window *window,
 456                                             int portion, int whole,
 457                                             int position));
 458
 459
 460   /* The following three hooks are used when we're doing a thorough
 461      redisplay of the frame.  We don't explicitly know which scroll bars
 462      are going to be deleted, because keeping track of when windows go
 463      away is a real pain - can you say set-window-configuration?
 464      Instead, we just assert at the beginning of redisplay that *all*
 465      scroll bars are to be removed, and then save scroll bars from the
 466      fiery pit when we actually redisplay their window.  */
 467
 468   /* Arrange for all scroll bars on FRAME to be removed at the next call
 469      to `*judge_scroll_bars_hook'.  A scroll bar may be spared if
 470      `*redeem_scroll_bar_hook' is applied to its window before the judgement.
 471
 472      This should be applied to each frame each time its window tree is
 473      redisplayed, even if it is not displaying scroll bars at the moment;
 474      if the HAS_SCROLL_BARS flag has just been turned off, only calling
 475      this and the judge_scroll_bars_hook will get rid of them.
 476
 477      If non-zero, this hook should be safe to apply to any frame,
 478      whether or not it can support scroll bars, and whether or not it is
 479      currently displaying them.  */
 480   void (*condemn_scroll_bars_hook) P_ ((struct frame *frame));
 481
 482   /* Unmark WINDOW's scroll bar for deletion in this judgement cycle.
 483      Note that it's okay to redeem a scroll bar that is not condemned.  */
 484   void (*redeem_scroll_bar_hook) P_ ((struct window *window));
 485
 486   /* Remove all scroll bars on FRAME that haven't been saved since the
 487      last call to `*condemn_scroll_bars_hook'.
 488
 489      This should be applied to each frame after each time its window
 490      tree is redisplayed, even if it is not displaying scroll bars at the
 491      moment; if the HAS_SCROLL_BARS flag has just been turned off, only
 492      calling this and condemn_scroll_bars_hook will get rid of them.
 493
 494      If non-zero, this hook should be safe to apply to any frame,
 495      whether or not it can support scroll bars, and whether or not it is
 496      currently displaying them.  */
 497   void (*judge_scroll_bars_hook) P_ ((struct frame *FRAME));
 498
 499 \f
 500   /* Called to read input events.
 501
 502      DEVICE indicates which display device to read from.  Input events
 503      should be read into BUF, the size of which is given in SIZE.
 504      EXPECTED is non-zero if the caller suspects that new input is
 505      available.
 506
 507      A positive return value indicates that that many input events
 508      where read into BUF.
 509      Zero means no events were immediately available.
 510      A value of -1 means a transient read error, while -2 indicates
 511      that the device was closed (hangup), and it should be deleted.
 512
 513      XXX Please note that a non-zero value of EXPECTED only means that
 514      there is available input on at least one of the currently opened
 515      display devices -- but not necessarily on this device.
 516      Therefore, in most cases EXPECTED should be simply ignored.
 517
 518      XXX This documentation needs to be updated.  */
 519   int (*read_socket_hook) P_ ((struct device *device,
 520                                int expected,
 521                                struct input_event *hold_quit));
 522
 523   /* Called when a frame's display becomes entirely up to date.  */
 524   void (*frame_up_to_date_hook) P_ ((struct frame *));
 525
 526 \f
 527   /* Called to delete the device-specific portions of a frame that is
 528      on this display device. */
 529   void (*delete_frame_hook) P_ ((struct frame *));
 530
 531   /* Called after the last frame on this device is deleted, or when
 532      the display device was closed (hangup).
 533
 534      If this is NULL, then the generic delete_device is called
 535      instead.  Otherwise the hook must call delete_device itself.
 536
 537      The hook must check for and close any live frames that are still
 538      on the device.  Fdelete_frame ensures that there are no live
 539      frames on the device when it calls this hook, so infinite
 540      recursion is prevented.  */
 541   void (*delete_device_hook) P_ ((struct device *));
 542 };
 543
 544
 545 /* Chain of all display devices currently in use. */
 546 extern struct device *device_list;
 547
 548 #define FRAME_MUST_WRITE_SPACES(f) ((f)->device->must_write_spaces)
 549 #define FRAME_FAST_CLEAR_END_OF_LINE(f) ((f)->device->fast_clear_end_of_line)
 550 #define FRAME_LINE_INS_DEL_OK(f) ((f)->device->line_ins_del_ok)
 551 #define FRAME_CHAR_INS_DEL_OK(f) ((f)->device->char_ins_del_ok)
 552 #define FRAME_SCROLL_REGION_OK(f) ((f)->device->scroll_region_ok)
 553 #define FRAME_SCROLL_REGION_COST(f) ((f)->device->scroll_region_cost)
 554 #define FRAME_MEMORY_BELOW_FRAME(f) ((f)->device->memory_below_frame)
 555
 556 #define FRAME_TERMINAL_CODING(f) ((f)->device->terminal_coding)
 557 #define FRAME_KEYBOARD_CODING(f) ((f)->device->keyboard_coding)
 558
 559 #define DEVICE_TERMINAL_CODING(d) ((d)->terminal_coding)
 560 #define DEVICE_KEYBOARD_CODING(d) ((d)->keyboard_coding)
 561
 562 #define FRAME_RIF(f) ((f)->device->rif)
 563
 564 #define FRAME_DEVICE(f) ((f)->device)
 565
 566 /* FRAME_WINDOW_P tests whether the frame is a window, and is
 567    defined to be the predicate for the window system being used.  */
 568
 569 #ifdef HAVE_X_WINDOWS
 570 #define FRAME_WINDOW_P(f) FRAME_X_P (f)
 571 #endif
 572 #ifdef HAVE_NTGUI
 573 #define FRAME_WINDOW_P(f) FRAME_W32_P (f)
 574 #endif
 575 #ifdef MAC_OS
 576 #define FRAME_WINDOW_P(f) FRAME_MAC_P (f)
 577 #endif
 578 #ifndef FRAME_WINDOW_P
 579 #define FRAME_WINDOW_P(f) (0)
 580 #endif
 581
 582 /* Return true if the display device is not suspended. */
 583 #define DEVICE_ACTIVE_P(d) ((d)->type != output_termcap || (d)->display_info.tty->input)
 584
 585 extern struct device *create_device P_ ((void));
 586 extern void delete_device P_ ((struct device *));
 587
 588 /* The initial display device, created by initial_term_init. */
 589 extern struct device *initial_device;
 590
 591 /* arch-tag: 33a00ecc-52b5-4186-a410-8801ac9f087d
 592    (do not change this comment) */