Minor fixes in window resizing routines and documentation update.
[emacs.git] / src / termhooks.h
blob34e1364effde5b0cdaeab3e6faa8071a65efee29
1 /* Parameters and display hooks for terminal devices.
3 Copyright (C) 1985-1986, 1993-1994, 2001-2011 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
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 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
21 /* Miscellanea. */
23 #include "systime.h" /* for Time */
25 struct glyph;
26 struct frame;
29 enum scroll_bar_part {
30 scroll_bar_above_handle,
31 scroll_bar_handle,
32 scroll_bar_below_handle,
33 scroll_bar_up_arrow,
34 scroll_bar_down_arrow,
35 scroll_bar_to_top,
36 scroll_bar_to_bottom,
37 scroll_bar_end_scroll,
38 scroll_bar_move_ratio
41 /* If the value of the frame parameter changed, whis hook is called.
42 For example, if going from fullscreen to not fullscreen this hook
43 may do something OS dependent, like extended window manager hints on X11. */
44 extern void (*fullscreen_hook) (struct frame *f);
47 /* Input queue declarations and hooks. */
49 enum event_kind
51 NO_EVENT, /* nothing happened. This should never
52 actually appear in the event queue. */
54 ASCII_KEYSTROKE_EVENT, /* The ASCII code is in .code, perhaps
55 with modifiers applied.
56 .modifiers holds the state of the
57 modifier keys.
58 .frame_or_window is the frame in
59 which the key was typed.
60 .timestamp gives a timestamp (in
61 milliseconds) for the keystroke. */
62 MULTIBYTE_CHAR_KEYSTROKE_EVENT, /* The multibyte char code is in .code,
63 perhaps with modifiers applied.
64 The others are the same as
65 ASCII_KEYSTROKE_EVENT. */
66 NON_ASCII_KEYSTROKE_EVENT, /* .code is a number identifying the
67 function key. A code N represents
68 a key whose name is
69 function_key_names[N]; function_key_names
70 is a table in keyboard.c to which you
71 should feel free to add missing keys.
72 .modifiers holds the state of the
73 modifier keys.
74 .frame_or_window is the frame in
75 which the key was typed.
76 .timestamp gives a timestamp (in
77 milliseconds) for the keystroke. */
78 TIMER_EVENT, /* A timer fired. */
79 MOUSE_CLICK_EVENT, /* The button number is in .code; it must
80 be >= 0 and < NUM_MOUSE_BUTTONS, defined
81 below.
82 .modifiers holds the state of the
83 modifier keys.
84 .x and .y give the mouse position,
85 in characters, within the window.
86 .frame_or_window gives the frame
87 the mouse click occurred in.
88 .timestamp gives a timestamp (in
89 milliseconds) for the click. */
90 WHEEL_EVENT, /* A wheel event is generated by a
91 wheel on a mouse (e.g., MS
92 Intellimouse).
93 .modifiers holds the rotate
94 direction (up or down), and the
95 state of the modifier keys.
96 .x and .y give the mouse position,
97 in characters, within the window.
98 .frame_or_window gives the frame
99 the wheel event occurred in.
100 .timestamp gives a timestamp (in
101 milliseconds) for the event. */
102 HORIZ_WHEEL_EVENT, /* A wheel event generated by a second
103 horizontal wheel that is present on some
104 mice. See WHEEL_EVENT. */
105 #if defined (WINDOWSNT)
106 LANGUAGE_CHANGE_EVENT, /* A LANGUAGE_CHANGE_EVENT is
107 generated on WINDOWSNT or Mac OS
108 when the keyboard layout or input
109 language is changed by the
110 user. */
111 #endif
112 SCROLL_BAR_CLICK_EVENT, /* .code gives the number of the mouse button
113 that was clicked.
114 .modifiers holds the state of the modifier
115 keys.
116 .part is a lisp symbol indicating which
117 part of the scroll bar got clicked.
118 .x gives the distance from the start of the
119 scroll bar of the click; .y gives the total
120 length of the scroll bar.
121 .frame_or_window gives the window
122 whose scroll bar was clicked in.
123 .timestamp gives a timestamp (in
124 milliseconds) for the click. */
125 SELECTION_REQUEST_EVENT, /* Another X client wants a selection from us.
126 See `struct selection_input_event'. */
127 SELECTION_CLEAR_EVENT, /* Another X client cleared our selection. */
128 BUFFER_SWITCH_EVENT, /* A process filter has switched buffers. */
129 DELETE_WINDOW_EVENT, /* An X client said "delete this window". */
130 MENU_BAR_EVENT, /* An event generated by the menu bar.
131 The frame_or_window field's cdr holds the
132 Lisp-level event value.
133 (Only the toolkit version uses these.) */
134 ICONIFY_EVENT, /* An X client iconified this window. */
135 DEICONIFY_EVENT, /* An X client deiconified this window. */
136 MENU_BAR_ACTIVATE_EVENT, /* A button press in the menu bar
137 (toolkit version only). */
138 DRAG_N_DROP_EVENT, /* A drag-n-drop event is generated when
139 files selected outside of Emacs are dropped
140 onto an Emacs window.
141 .modifiers holds the state of the
142 modifier keys.
143 .x and .y give the mouse position,
144 in characters, within the window.
145 .frame_or_window is the frame in
146 which the drop was made.
147 .arg is a platform-dependent
148 representation of the dropped items.
149 .timestamp gives a timestamp (in
150 milliseconds) for the click. */
151 USER_SIGNAL_EVENT, /* A user signal.
152 code is a number identifying it,
153 index into lispy_user_signals. */
155 /* Help events. Member `frame_or_window' of the input_event is the
156 frame on which the event occurred, and member `arg' contains
157 the help to show. */
158 HELP_EVENT,
160 /* An event from a tool-bar. Member `arg' of the input event
161 contains the tool-bar item selected. If `frame_or_window'
162 and `arg' are equal, this is a prefix event. */
163 TOOL_BAR_EVENT,
165 /* Queued from XTread_socket on FocusIn events. Translated into
166 `switch-frame' events in kbd_buffer_get_event, if necessary. */
167 FOCUS_IN_EVENT,
169 /* Generated when mouse moves over window not currently selected. */
170 SELECT_WINDOW_EVENT,
172 /* Queued from XTread_socket when session manager sends
173 save yourself before shutdown. */
174 SAVE_SESSION_EVENT
176 #ifdef HAVE_GPM
177 , GPM_CLICK_EVENT
178 #endif
180 #ifdef HAVE_DBUS
181 , DBUS_EVENT
182 #endif
184 , CONFIG_CHANGED_EVENT
186 #ifdef WINDOWSNT
187 /* Generated when an APPCOMMAND event is received, in response to
188 Multimedia or Internet buttons on some keyboards.
189 Such keys are available as normal function keys on X through the
190 Xkeyboard extension.
191 On Windows, some of them get mapped to normal function key events,
192 but others need to be handled by APPCOMMAND. Handling them all as
193 APPCOMMAND events means they can be disabled
194 (w32-pass-multimedia-buttons-to-system), important on Windows since
195 the system never sees these keys if Emacs claims to handle them.
196 On X, the window manager seems to grab the keys it wants
197 first, so this is not a problem there. */
198 , MULTIMEDIA_KEY_EVENT
199 #endif
201 #ifdef HAVE_NS
202 /* Generated when native multi-keystroke input method is used to modify
203 tentative or indicative text display. */
204 , NS_TEXT_EVENT
205 /* Non-key system events (e.g. application menu events) */
206 , NS_NONKEY_EVENT
207 #endif
211 /* If a struct input_event has a kind which is SELECTION_REQUEST_EVENT
212 or SELECTION_CLEAR_EVENT, then its contents are really described
213 by `struct selection_input_event'; see xterm.h. */
215 /* The keyboard input buffer is an array of these structures. Each one
216 represents some sort of input event - a keystroke, a mouse click, or
217 a window system event. These get turned into their lispy forms when
218 they are removed from the event queue. */
220 struct input_event
222 /* What kind of event was this? */
223 enum event_kind kind;
225 /* For an ASCII_KEYSTROKE_EVENT and MULTIBYTE_CHAR_KEYSTROKE_EVENT,
226 this is the character.
227 For a NON_ASCII_KEYSTROKE_EVENT, this is the keysym code.
228 For a mouse event, this is the button number.
229 For a HELP_EVENT, this is the position within the object
230 (stored in ARG below) where the help was found. */
231 /* In WindowsNT, for a mouse wheel event, this is the delta. */
232 EMACS_INT code;
233 enum scroll_bar_part part;
235 int modifiers; /* See enum below for interpretation. */
237 Lisp_Object x, y;
238 Time timestamp;
240 /* This is padding just to put the frame_or_window field
241 past the size of struct selection_input_event. */
242 int *padding[2];
244 /* This field is copied into a vector while the event is in the queue,
245 so that garbage collections won't kill it. */
246 /* In a menu_bar_event, this is a cons cell whose car is the frame
247 and whose cdr is the Lisp object that is the event's value. */
248 /* This field is last so that struct selection_input_event
249 does not overlap with it. */
250 Lisp_Object frame_or_window;
252 /* Additional event argument. This is used for TOOL_BAR_EVENTs and
253 HELP_EVENTs and avoids calling Fcons during signal handling. */
254 Lisp_Object arg;
257 #define EVENT_INIT(event) memset (&(event), 0, sizeof (struct input_event))
259 /* Bits in the modifiers member of the input_event structure.
260 Note that reorder_modifiers assumes that the bits are in canonical
261 order.
263 The modifiers applied to mouse clicks are rather ornate. The
264 window-system-specific code should store mouse clicks with
265 up_modifier or down_modifier set. Having an explicit down modifier
266 simplifies some of window-system-independent code; without it, the
267 code would have to recognize down events by checking if the event
268 is a mouse click lacking the click and drag modifiers.
270 The window-system independent code turns all up_modifier events
271 bits into drag_modifier, click_modifier, double_modifier, or
272 triple_modifier events. The click_modifier has no written
273 representation in the names of the symbols used as event heads,
274 but it does appear in the Qevent_symbol_components property of the
275 event heads. */
276 enum {
277 up_modifier = 1, /* Only used on mouse buttons - always
278 turned into a click or a drag modifier
279 before lisp code sees the event. */
280 down_modifier = 2, /* Only used on mouse buttons. */
281 drag_modifier = 4, /* This is never used in the event
282 queue; it's only used internally by
283 the window-system-independent code. */
284 click_modifier= 8, /* See drag_modifier. */
285 double_modifier= 16, /* See drag_modifier. */
286 triple_modifier= 32, /* See drag_modifier. */
288 /* The next four modifier bits are used also in keyboard events at
289 the Lisp level.
291 It's probably not the greatest idea to use the 2^23 bit for any
292 modifier. It may or may not be the sign bit, depending on
293 VALBITS, so using it to represent a modifier key means that
294 characters thus modified have different integer equivalents
295 depending on the architecture they're running on. Oh, and
296 applying XINT to a character whose 2^23 bit is set sign-extends
297 it, so you get a bunch of bits in the mask you didn't want.
299 The CHAR_ macros are defined in lisp.h. */
300 alt_modifier = CHAR_ALT, /* Under X, the XK_Alt_[LR] keysyms. */
301 super_modifier= CHAR_SUPER, /* Under X, the XK_Super_[LR] keysyms. */
302 hyper_modifier= CHAR_HYPER, /* Under X, the XK_Hyper_[LR] keysyms. */
303 shift_modifier= CHAR_SHIFT,
304 ctrl_modifier = CHAR_CTL,
305 meta_modifier = CHAR_META /* Under X, the XK_Meta_[LR] keysyms. */
308 #ifdef HAVE_GPM
309 #include <gpm.h>
310 extern int handle_one_term_event (struct tty_display_info *, Gpm_Event *, struct input_event *);
311 #ifndef HAVE_WINDOW_SYSTEM
312 extern void term_mouse_moveto (int, int);
313 #endif
315 /* The device for which we have enabled gpm support. */
316 extern struct tty_display_info *gpm_tty;
317 #endif
320 struct ns_display_info;
321 struct x_display_info;
322 struct w32_display_info;
324 /* Terminal-local parameters. */
325 struct terminal
327 /* This is for Lisp; the terminal code does not refer to it. */
328 struct vectorlike_header header;
330 /* Parameter alist of this terminal. */
331 Lisp_Object param_alist;
333 /* List of charsets supported by the terminal. It is set by
334 Fset_terminal_coding_system_internal along with
335 the member terminal_coding. */
336 Lisp_Object charset_list;
338 /* All fields before `next_terminal' should be Lisp_Object and are traced
339 by the GC. All fields afterwards are ignored by the GC. */
341 /* Chain of all terminal devices. */
342 struct terminal *next_terminal;
344 /* Unique id for this terminal device. */
345 int id;
347 /* The number of frames that are on this terminal. */
348 int reference_count;
350 /* The type of the terminal device. */
351 enum output_method type;
353 /* The name of the terminal device. Do not use this to uniquely
354 identify a terminal; the same device may be opened multiple
355 times. */
356 char *name;
358 /* The terminal's keyboard object. */
359 struct kboard *kboard;
361 #ifdef HAVE_WINDOW_SYSTEM
362 /* Cache of images. */
363 struct image_cache *image_cache;
364 #endif /* HAVE_WINDOW_SYSTEM */
366 /* Device-type dependent data shared amongst all frames on this terminal. */
367 union display_info
369 struct tty_display_info *tty; /* termchar.h */
370 struct x_display_info *x; /* xterm.h */
371 struct w32_display_info *w32; /* w32term.h */
372 struct ns_display_info *ns; /* nsterm.h */
373 } display_info;
376 /* Coding-system to be used for encoding terminal output. This
377 structure contains information of a coding-system specified by
378 the function `set-terminal-coding-system'. Also see
379 `safe_terminal_coding' in coding.h. */
380 struct coding_system *terminal_coding;
382 /* Coding-system of what is sent from terminal keyboard. This
383 structure contains information of a coding-system specified by
384 the function `set-keyboard-coding-system'. */
385 struct coding_system *keyboard_coding;
387 /* Terminal characteristics. */
388 /* XXX Are these really used on non-termcap displays? */
390 int must_write_spaces; /* Nonzero means spaces in the text must
391 actually be output; can't just skip over
392 some columns to leave them blank. */
393 int fast_clear_end_of_line; /* Nonzero means terminal has a `ce' string */
395 int line_ins_del_ok; /* Terminal can insert and delete lines */
396 int char_ins_del_ok; /* Terminal can insert and delete chars */
397 int scroll_region_ok; /* Terminal supports setting the scroll
398 window */
399 int scroll_region_cost; /* Cost of setting the scroll window,
400 measured in characters. */
401 int memory_below_frame; /* Terminal remembers lines scrolled
402 off bottom */
404 #if 0 /* These are not used anywhere. */
405 /* EMACS_INT baud_rate; */ /* Output speed in baud */
406 int min_padding_speed; /* Speed below which no padding necessary. */
407 int dont_calculate_costs; /* Nonzero means don't bother computing
408 various cost tables; we won't use them. */
409 #endif
412 /* Window-based redisplay interface for this device (0 for tty
413 devices). */
414 struct redisplay_interface *rif;
416 /* Frame-based redisplay interface. */
418 /* Text display hooks. */
420 void (*cursor_to_hook) (struct frame *f, int vpos, int hpos);
421 void (*raw_cursor_to_hook) (struct frame *, int, int);
423 void (*clear_to_end_hook) (struct frame *);
424 void (*clear_frame_hook) (struct frame *);
425 void (*clear_end_of_line_hook) (struct frame *, int);
427 void (*ins_del_lines_hook) (struct frame *f, int, int);
429 void (*insert_glyphs_hook) (struct frame *f, struct glyph *s, int n);
430 void (*write_glyphs_hook) (struct frame *f, struct glyph *s, int n);
431 void (*delete_glyphs_hook) (struct frame *, int);
433 void (*ring_bell_hook) (struct frame *f);
434 void (*toggle_invisible_pointer_hook) (struct frame *f, int invisible);
436 void (*reset_terminal_modes_hook) (struct terminal *);
437 void (*set_terminal_modes_hook) (struct terminal *);
439 void (*update_begin_hook) (struct frame *);
440 void (*update_end_hook) (struct frame *);
441 void (*set_terminal_window_hook) (struct frame *, int);
443 /* Multi-frame and mouse support hooks. */
445 /* Return the current position of the mouse.
447 Set *f to the frame the mouse is in, or zero if the mouse is in no
448 Emacs frame. If it is set to zero, all the other arguments are
449 garbage.
451 If the motion started in a scroll bar, set *bar_window to the
452 scroll bar's window, *part to the part the mouse is currently over,
453 *x to the position of the mouse along the scroll bar, and *y to the
454 overall length of the scroll bar.
456 Otherwise, set *bar_window to Qnil, and *x and *y to the column and
457 row of the character cell the mouse is over.
459 Set *time to the time the mouse was at the returned position.
461 This should clear mouse_moved until the next motion
462 event arrives. */
463 void (*mouse_position_hook) (struct frame **f, int,
464 Lisp_Object *bar_window,
465 enum scroll_bar_part *part,
466 Lisp_Object *x,
467 Lisp_Object *y,
468 Time *);
470 /* The window system handling code should set this if the mouse has
471 moved since the last call to the mouse_position_hook. Calling that
472 hook should clear this. */
473 int mouse_moved;
475 /* When a frame's focus redirection is changed, this hook tells the
476 window system code to re-decide where to put the highlight. Under
477 X, this means that Emacs lies about where the focus is. */
478 void (*frame_rehighlight_hook) (struct frame *);
480 /* If we're displaying frames using a window system that can stack
481 frames on top of each other, this hook allows you to bring a frame
482 to the front, or bury it behind all the other windows. If this
483 hook is zero, that means the terminal we're displaying on doesn't
484 support overlapping frames, so there's no need to raise or lower
485 anything.
487 If RAISE_FLAG is non-zero, F is brought to the front, before all other
488 windows. If RAISE_FLAG is zero, F is sent to the back, behind all other
489 windows. */
490 void (*frame_raise_lower_hook) (struct frame *f, int raise_flag);
492 /* If the value of the frame parameter changed, whis hook is called.
493 For example, if going from fullscreen to not fullscreen this hook
494 may do something OS dependent, like extended window manager hints on X11. */
495 void (*fullscreen_hook) (struct frame *f);
498 /* Scroll bar hooks. */
500 /* The representation of scroll bars is determined by the code which
501 implements them, except for one thing: they must be represented by
502 lisp objects. This allows us to place references to them in
503 Lisp_Windows without worrying about those references becoming
504 dangling references when the scroll bar is destroyed.
506 The window-system-independent portion of Emacs just refers to
507 scroll bars via their windows, and never looks inside the scroll bar
508 representation; it always uses hook functions to do all the
509 scroll bar manipulation it needs.
511 The `vertical_scroll_bar' field of a Lisp_Window refers to that
512 window's scroll bar, or is nil if the window doesn't have a
513 scroll bar.
515 The `scroll_bars' and `condemned_scroll_bars' fields of a Lisp_Frame
516 are free for use by the scroll bar implementation in any way it sees
517 fit. They are marked by the garbage collector. */
520 /* Set the vertical scroll bar for WINDOW to have its upper left corner
521 at (TOP, LEFT), and be LENGTH rows high. Set its handle to
522 indicate that we are displaying PORTION characters out of a total
523 of WHOLE characters, starting at POSITION. If WINDOW doesn't yet
524 have a scroll bar, create one for it. */
525 void (*set_vertical_scroll_bar_hook) (struct window *window,
526 int portion, int whole,
527 int position);
530 /* The following three hooks are used when we're doing a thorough
531 redisplay of the frame. We don't explicitly know which scroll bars
532 are going to be deleted, because keeping track of when windows go
533 away is a real pain - can you say set-window-configuration?
534 Instead, we just assert at the beginning of redisplay that *all*
535 scroll bars are to be removed, and then save scroll bars from the
536 fiery pit when we actually redisplay their window. */
538 /* Arrange for all scroll bars on FRAME to be removed at the next call
539 to `*judge_scroll_bars_hook'. A scroll bar may be spared if
540 `*redeem_scroll_bar_hook' is applied to its window before the judgement.
542 This should be applied to each frame each time its window tree is
543 redisplayed, even if it is not displaying scroll bars at the moment;
544 if the HAS_SCROLL_BARS flag has just been turned off, only calling
545 this and the judge_scroll_bars_hook will get rid of them.
547 If non-zero, this hook should be safe to apply to any frame,
548 whether or not it can support scroll bars, and whether or not it is
549 currently displaying them. */
550 void (*condemn_scroll_bars_hook) (struct frame *frame);
552 /* Unmark WINDOW's scroll bar for deletion in this judgement cycle.
553 Note that it's okay to redeem a scroll bar that is not condemned. */
554 void (*redeem_scroll_bar_hook) (struct window *window);
556 /* Remove all scroll bars on FRAME that haven't been saved since the
557 last call to `*condemn_scroll_bars_hook'.
559 This should be applied to each frame after each time its window
560 tree is redisplayed, even if it is not displaying scroll bars at the
561 moment; if the HAS_SCROLL_BARS flag has just been turned off, only
562 calling this and condemn_scroll_bars_hook will get rid of them.
564 If non-zero, this hook should be safe to apply to any frame,
565 whether or not it can support scroll bars, and whether or not it is
566 currently displaying them. */
567 void (*judge_scroll_bars_hook) (struct frame *FRAME);
570 /* Called to read input events.
572 TERMINAL indicates which terminal device to read from. Input
573 events should be read into BUF, the size of which is given in
574 SIZE. EXPECTED is non-zero if the caller suspects that new input
575 is available.
577 A positive return value indicates that that many input events
578 where read into BUF.
579 Zero means no events were immediately available.
580 A value of -1 means a transient read error, while -2 indicates
581 that the device was closed (hangup), and it should be deleted.
583 XXX Please note that a non-zero value of EXPECTED only means that
584 there is available input on at least one of the currently opened
585 terminal devices -- but not necessarily on this device.
586 Therefore, in most cases EXPECTED should be simply ignored.
588 XXX This documentation needs to be updated. */
589 int (*read_socket_hook) (struct terminal *terminal,
590 int expected,
591 struct input_event *hold_quit);
593 /* Called when a frame's display becomes entirely up to date. */
594 void (*frame_up_to_date_hook) (struct frame *);
597 /* Called to delete the device-specific portions of a frame that is
598 on this terminal device. */
599 void (*delete_frame_hook) (struct frame *);
601 /* Called after the last frame on this terminal is deleted, or when
602 the display device was closed (hangup).
604 If this is NULL, then the generic delete_terminal is called
605 instead. Otherwise the hook must call delete_terminal itself.
607 The hook must check for and close any live frames that are still
608 on the terminal. delete_frame ensures that there are no live
609 frames on the terminal when it calls this hook, so infinite
610 recursion is prevented. */
611 void (*delete_terminal_hook) (struct terminal *);
615 /* Chain of all terminal devices currently in use. */
616 extern struct terminal *terminal_list;
618 #define FRAME_MUST_WRITE_SPACES(f) ((f)->terminal->must_write_spaces)
619 #define FRAME_FAST_CLEAR_END_OF_LINE(f) ((f)->terminal->fast_clear_end_of_line)
620 #define FRAME_LINE_INS_DEL_OK(f) ((f)->terminal->line_ins_del_ok)
621 #define FRAME_CHAR_INS_DEL_OK(f) ((f)->terminal->char_ins_del_ok)
622 #define FRAME_SCROLL_REGION_OK(f) ((f)->terminal->scroll_region_ok)
623 #define FRAME_SCROLL_REGION_COST(f) ((f)->terminal->scroll_region_cost)
624 #define FRAME_MEMORY_BELOW_FRAME(f) ((f)->terminal->memory_below_frame)
626 #define FRAME_TERMINAL_CODING(f) ((f)->terminal->terminal_coding)
627 #define FRAME_KEYBOARD_CODING(f) ((f)->terminal->keyboard_coding)
629 #define TERMINAL_TERMINAL_CODING(d) ((d)->terminal_coding)
630 #define TERMINAL_KEYBOARD_CODING(d) ((d)->keyboard_coding)
632 #define FRAME_RIF(f) ((f)->terminal->rif)
634 #define FRAME_TERMINAL(f) ((f)->terminal)
636 /* Return true if the terminal device is not suspended. */
637 #define TERMINAL_ACTIVE_P(d) (((d)->type != output_termcap && (d)->type !=output_msdos_raw) || (d)->display_info.tty->input)
639 extern struct terminal *get_terminal (Lisp_Object terminal, int);
640 extern struct terminal *create_terminal (void);
641 extern void delete_terminal (struct terminal *);
643 /* The initial terminal device, created by initial_term_init. */
644 extern struct terminal *initial_terminal;
646 extern unsigned char *encode_terminal_code (struct glyph *, int,
647 struct coding_system *);
649 #ifdef HAVE_GPM
650 extern void close_gpm (int gpm_fd);
651 #endif