1 /* Interface definitions for display code.
2 Copyright (C) 1985, 1993, 1994, 1997, 1998, 1999
3 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 2, or (at your option)
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; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* New redisplay written by Gerd Moellmann <gerd@acm.org>. */
24 #ifndef DISPEXTERN_H_INCLUDED
25 #define DISPEXTERN_H_INCLUDED
43 /* Structure forward declarations. Some are here because function
44 prototypes below reference structure types before their definition
45 in this file. Some are here because not every file including
46 dispextern.h also includes frame.h and windows.h. */
57 /***********************************************************************
59 ***********************************************************************/
61 /* If GLYPH_DEBUG is non-zero, additional checks are activated. Turn
62 it off by defining the macro GLYPH_DEBUG to zero. */
68 /* Macros to include code only if GLYPH_DEBUG != 0. */
72 #define xassert(X) if (!(X)) abort (); else (void) 0
74 #define IF_DEBUG(X) (void) 0
75 #define xassert(X) (void) 0
78 /* Macro for displaying traces of redisplay. If Emacs was compiled
79 with GLYPH_DEBUG != 0, the variable trace_redisplay_p can be set to
80 a non-zero value in debugging sessions to activate traces. */
84 extern int trace_redisplay_p
;
88 if (trace_redisplay_p) \
93 #else /* GLYPH_DEBUG == 0 */
95 #define TRACE(X) (void) 0
97 #endif /* GLYPH_DEBUG == 0 */
101 /***********************************************************************
103 ***********************************************************************/
105 /* Starting with Emacs 20.3, characters from strings and buffers have
106 both a character and a byte position associated with them. The
107 following structure holds such a pair of positions. */
111 /* Character position. */
114 /* Corresponding byte position. */
118 /* Access character and byte position of POS in a functional form. */
120 #define BYTEPOS(POS) (POS).bytepos
121 #define CHARPOS(POS) (POS).charpos
123 /* Set character position of POS to CHARPOS, byte position to BYTEPOS. */
125 #define SET_TEXT_POS(POS, CHARPOS, BYTEPOS) \
126 ((POS).charpos = (CHARPOS), (POS).bytepos = BYTEPOS)
128 /* Increment text position POS. */
130 #define INC_TEXT_POS(POS) \
134 INC_POS ((POS).bytepos); \
138 /* Decrement text position POS. */
140 #define DEC_TEXT_POS(POS) \
144 DEC_POS ((POS).bytepos); \
148 /* Set text position POS from marker MARKER. */
150 #define SET_TEXT_POS_FROM_MARKER(POS, MARKER) \
151 (CHARPOS (POS) = marker_position ((MARKER)), \
152 BYTEPOS (POS) = marker_byte_position ((MARKER)))
154 /* Set marker MARKER from text position POS. */
156 #define SET_MARKER_FROM_TEXT_POS(MARKER, POS) \
157 set_marker_both ((MARKER), Qnil, CHARPOS ((POS)), BYTEPOS ((POS)))
159 /* Value is non-zero if character and byte positions of POS1 and POS2
162 #define TEXT_POS_EQUAL_P(POS1, POS2) \
163 ((POS1).charpos == (POS2).charpos \
164 && (POS1).bytepos == (POS2).bytepos)
166 /* When rendering glyphs, redisplay scans string or buffer text,
167 overlay strings in that text, and does display table or control
168 character translations. The following structure captures a
169 position taking all this into account. */
173 /* Buffer or string position. */
176 /* If this is a position in an overlay string, overlay_string_index
177 is the index of that overlay string in the sequence of overlay
178 strings at `pos' in the order redisplay processes them. A value
179 < 0 means that this is not a position in an overlay string. */
180 int overlay_string_index
;
182 /* If this is a position in an overlay string, string_pos is the
183 position within that string. */
184 struct text_pos string_pos
;
186 /* If the character at the position above is a control character or
187 has a display table entry, dpvec_index is an index in the display
188 table or control character translation of that character. A
189 value < 0 means this is not a position in such a translation. */
195 /***********************************************************************
197 ***********************************************************************/
199 /* Enumeration of glyph types. Glyph structures contain a type field
200 containing one of the enumerators defined here. */
204 /* Glyph describes a character. */
207 /* Glyph describes an image. */
210 /* Glyph is a space of fractional width and/or height. */
219 /* Position from which this glyph was drawn. If `object' below is a
220 Lisp string, this is a position in that string. If it is a
221 buffer, this is a position in that buffer. A value of -1
222 together with a null object means glyph is a truncation glyph at
223 the start of a row. */
226 /* Lisp object source of this glyph. Currently either a buffer or
230 /* Width in pixels. */
233 /* Vertical offset. If < 0, the glyph is displayed raised, if > 0
234 the glyph is displayed lowered. */
237 /* Which kind of glyph this is---character, image etc. Value
238 should be an enumerator of type enum glyph_type. */
241 /* 1 means this glyph was produced from multibyte text. Zero
242 means it was produced from unibyte text, i.e. charsets aren't
243 applicable, and encoding is not performed. */
244 unsigned multibyte_p
: 1;
246 /* Non-zero means draw a box line at the left or right side of this
247 glyph. This is part of the implementation of the face attribute
249 unsigned left_box_line_p
: 1;
250 unsigned right_box_line_p
: 1;
252 /* Non-zero means this glyph's physical ascent or descent is greater
253 than its logical ascent/descent, i.e. it may potentially overlap
254 glyphs above or below it. */
255 unsigned overlaps_vertically_p
: 1;
257 /* A union of sub-structures for different glyph types. */
260 /* Sub-structure for character glyphs (type == CHAR_GLYPH). */
263 /* Character code. */
266 /* Character's face. */
267 unsigned face_id
: 11;
269 /* 1 means glyph is a padding glyph. Padding glyphs are used
270 for characters whose visual shape consists of more than one
271 glyph (e.g. Asian characters). All but the first glyph of
272 such a glyph sequence have the padding_p flag set. Only used
273 for terminal frames, and there only to minimize code changes.
274 A better way would probably be to use the width field of
275 glyphs to express padding. */
276 unsigned padding_p
: 1;
280 /* Sub-structure for image glyphs (type == IMAGE_GLYPH). */
286 /* Face under the image. */
287 unsigned face_id
: 12;
291 /* Sub-structure for type == STRETCH_GLYPH. */
294 /* The height of the glyph. */
295 unsigned height
: 11;
297 /* The ascent of the glyph. */
298 unsigned ascent
: 10;
300 /* The face of the stretch glyph. */
301 unsigned face_id
: 11;
305 /* Used to compare all bit-fields above in one step. */
311 /* Is GLYPH a space? */
313 #define CHAR_GLYPH_SPACE_P(GLYPH) \
314 (GLYPH_FROM_CHAR_GLYPH ((GLYPH)) == SPACEGLYPH)
316 /* Are glyphs *X and *Y equal? */
318 #define GLYPH_EQUAL_P(X, Y) \
319 ((X)->type == (Y)->type \
320 && (X)->u.val == (Y)->u.val \
321 && (X)->left_box_line_p == (Y)->left_box_line_p \
322 && (X)->right_box_line_p == (Y)->right_box_line_p \
323 && (X)->voffset == (Y)->voffset)
325 /* Fill a character glyph GLYPH. CODE, FACE_ID, PADDING_P correspond
326 to the bits defined for the typedef `GLYPH' in lisp.h. */
328 #define SET_CHAR_GLYPH(GLYPH, CODE, FACE_ID, PADDING_P) \
331 (GLYPH).u.ch.code = (CODE); \
332 (GLYPH).u.ch.face_id = (FACE_ID); \
333 (GLYPH).u.ch.padding_p = (PADDING_P); \
337 /* Fill a character type glyph GLYPH from a glyph typedef FROM as
338 defined in lisp.h. */
340 #define SET_CHAR_GLYPH_FROM_GLYPH(GLYPH, FROM) \
341 SET_CHAR_GLYPH ((GLYPH), \
342 FAST_GLYPH_CHAR ((FROM)), \
343 FAST_GLYPH_FACE ((FROM)), \
344 ((FROM) & GLYPH_MASK_PADDING) != 0)
346 /* Construct a typedef'd GLYPH value from a character glyph GLYPH. */
348 #define GLYPH_FROM_CHAR_GLYPH(GLYPH) \
350 | ((GLYPH).u.ch.face_id << CHARACTERBITS) \
351 | ((GLYPH).u.ch.padding_p ? GLYPH_MASK_PADDING : 0))
353 /* Is GLYPH a padding glyph? */
355 #define CHAR_GLYPH_PADDING_P(GLYPH) (GLYPH).u.ch.padding_p
360 /***********************************************************************
362 ***********************************************************************/
366 Glyph memory for frame-based redisplay is allocated from the heap
367 in one vector kept in a glyph pool structure which is stored with
368 the frame. The size of the vector is made large enough to cover
369 all windows on the frame.
371 Both frame and window glyph matrices reference memory from a glyph
372 pool in frame-based redisplay.
374 In window-based redisplay, no glyphs pools exist; windows allocate
375 and free their glyph memory themselves. */
379 /* Vector of glyphs allocated from the heap. */
380 struct glyph
*glyphs
;
382 /* Allocated size of `glyphs'. */
385 /* Number of rows and columns in a matrix. */
391 /***********************************************************************
393 ***********************************************************************/
397 Three kinds of glyph matrices exist:
399 1. Frame glyph matrices. These are used for terminal frames whose
400 redisplay needs a view of the whole screen due to limited terminal
401 capabilities. Frame matrices are used only in the update phase
402 of redisplay. They are built in update_frame and not used after
403 the update has been performed.
405 2. Window glyph matrices on frames having frame glyph matrices.
406 Such matrices are sub-matrices of their corresponding frame matrix,
407 i.e. frame glyph matrices and window glyph matrices share the same
408 glyph memory which is allocated in form of a glyph_pool structure.
409 Glyph rows in such a window matrix are slices of frame matrix rows.
411 2. Free-standing window glyph matrices managing their own glyph
412 storage. This form is used in window-based redisplay which
413 includes variable width and height fonts etc.
415 The size of a window's row vector depends on the height of fonts
416 defined on its frame. It is chosen so that the vector is large
417 enough to describe all lines in a window when it is displayed in
418 the smallest possible character size. When new fonts are loaded,
419 or window sizes change, the row vector is adjusted accordingly. */
423 /* The pool from which glyph memory is allocated, if any. This is
424 null for frame matrices and for window matrices managing their
426 struct glyph_pool
*pool
;
428 /* Vector of glyph row structures. The row at nrows - 1 is reserved
429 for the mode line. */
430 struct glyph_row
*rows
;
432 /* Number of elements allocated for the vector rows above. */
435 /* The number of rows used by the window if all lines were displayed
436 with the smallest possible character height. */
439 /* Origin within the frame matrix if this is a window matrix on a
440 frame having a frame matrix. Both values are zero for
441 window-based redisplay. */
442 int matrix_x
, matrix_y
;
444 /* Width and height of the matrix in columns and rows. */
445 int matrix_w
, matrix_h
;
447 /* If this structure describes a window matrix, window_top_y is the
448 top-most y-position and window_height is the height of the
449 window, and window_vscroll is the vscroll at the time the matrix
450 was last adjusted. Only set for window-based redisplay. */
451 int window_top_y
, window_height
, window_width
, window_vscroll
;
453 /* Number of glyphs reserved for left and right marginal areas when
454 the matrix was last adjusted. */
455 int left_margin_glyphs
, right_margin_glyphs
;
457 /* Flag indicating that scrolling should not be tried in
458 update_window. This flag is set by functions like try_window_id
459 which do their own scrolling. */
460 unsigned no_scrolling_p
: 1;
462 /* Non-zero means window displayed in this matrix has a top mode
464 unsigned header_line_p
: 1;
467 /* A string identifying the method used to display the matrix. */
471 /* The buffer this matrix displays. Set in redisplay_internal. */
472 struct buffer
*buffer
;
474 /* Values of BEGV and ZV as of last redisplay. */
479 /* Check that glyph pointers stored in glyph rows of MATRIX are okay.
480 This aborts if any pointer is found twice. */
483 void check_matrix_pointer_lossage
P_ ((struct glyph_matrix
*));
484 #define CHECK_MATRIX(MATRIX) check_matrix_pointer_lossage ((MATRIX))
486 #define CHECK_MATRIX(MATRIX) (void) 0
491 /***********************************************************************
493 ***********************************************************************/
495 /* Area in window glyph matrix. If values are added or removed, the
496 function mark_object in alloc.c has to be changed. */
507 /* Rows of glyphs in a windows or frame glyph matrix.
509 Each row is partitioned into three areas. The start and end of
510 each area is recorded in a pointer as shown below.
512 +--------------------+-------------+---------------------+
513 | left margin area | text area | right margin area |
514 +--------------------+-------------+---------------------+
516 glyphs[LEFT_MARGIN_AREA] glyphs[RIGHT_MARGIN_AREA]
521 Rows in frame matrices reference glyph memory allocated in a frame
522 glyph pool (see the description of struct glyph_pool). Rows in
523 window matrices on frames having frame matrices reference slices of
524 the glyphs of corresponding rows in the frame matrix.
526 Rows in window matrices on frames having no frame matrices point to
527 glyphs allocated from the heap via xmalloc;
528 glyphs[LEFT_MARGIN_AREA] is the start address of the allocated
529 glyph structure array. */
533 /* Pointers to beginnings of areas. The end of an area A is found at
534 A + 1 in the vector. The last element of the vector is the end
537 Kludge alert: Even if used[TEXT_AREA] == 0, glyphs[TEXT_AREA][0]'s
538 position field is used. It is -1 if this row does not correspond
539 to any text; it is some buffer position if the row corresponds to
540 an empty display line that displays a line end. This is what old
541 redisplay used to do. (Except in code for terminal frames, this
542 kludge is no longer use, I believe. --gerd).
544 See also start, end, displays_text_p and ends_at_zv_p for cleaner
545 ways to do it. The special meaning of positions 0 and -1 will be
546 removed some day, so don't use it in new code. */
547 struct glyph
*glyphs
[1 + LAST_AREA
];
549 /* Number of glyphs actually filled in areas. */
550 short used
[LAST_AREA
];
552 /* Window-relative x and y-position of the top-left corner of this
553 row. If y < 0, this means that abs (y) pixels of the row are
554 invisible because it is partially visible at the top of a window.
555 If x < 0, this means that abs (x) pixels of the first glyph of
556 the text area of the row are invisible because the glyph is
557 partially visible. */
560 /* Width of the row in pixels without taking face extension at the
561 end of the row into account. */
564 /* Logical ascent/height of this line. The value of ascent is zero
565 and height is 1 on terminal frames. */
568 /* Physical ascent/height of this line. If max_ascent > ascent,
569 this line overlaps the line above it on the display. Otherwise,
570 if max_height > height, this line overlaps the line beneath it. */
571 int phys_ascent
, phys_height
;
573 /* Portion of row that is visible. Partially visible rows may be
574 found at the top and bottom of a window. This is 1 for tty
575 frames. It may be < 0 in case of completely invisible rows. */
578 /* Hash code. This hash code is available as soon as the row
579 is constructed, i.e. after a call to display_line. */
582 /* First position in this row. This is the text position, including
583 overlay position information etc, where the display of this row
584 started, and can thus be less the position of the first glyph
585 (e.g. due to invisible text or horizontal scrolling). */
586 struct display_pos start
;
588 /* Text position at the end of this row. This is the position after
589 the last glyph on this row. It can be greater than the last
590 glyph position + 1, due to truncation, invisible text etc. In an
591 up-to-date display, this should always be equal to the start
592 position of the next row. */
593 struct display_pos end
;
595 /* In a desired matrix, 1 means that this row must be updated. In a
596 current matrix, 0 means that the row has been invalidated, i.e.
597 the row's contents do not agree with what is visible on the
599 unsigned enabled_p
: 1;
601 /* Display this line in inverse video? Used for the mode line and
603 unsigned inverse_p
: 1;
605 /* 1 means row displays a text line that is truncated on the left or
607 unsigned truncated_on_left_p
: 1;
608 unsigned truncated_on_right_p
: 1;
610 /* 1 means the overlay arrow is on this line. */
611 unsigned overlay_arrow_p
: 1;
613 /* 1 means that this row displays a continued line, i.e. it has a
614 continuation mark at the right side. */
615 unsigned continued_p
: 1;
617 /* 0 means that this row does not contain any text, i.e. it is
618 a blank line at the window and buffer end. */
619 unsigned displays_text_p
: 1;
621 /* 1 means that this line ends at ZV. */
622 unsigned ends_at_zv_p
: 1;
624 /* 1 means the face of the last glyph in the text area is drawn to
625 the right end of the window. This flag is used in
626 update_text_area to optimize clearing to the end of the area. */
627 unsigned fill_line_p
: 1;
629 /* Non-zero means display a bitmap on X frames indicating that this
630 line contains no text and ends in ZV. */
631 unsigned indicate_empty_line_p
: 1;
633 /* 1 means this row contains glyphs that overlap each other because
634 of lbearing or rbearing. */
635 unsigned contains_overlapping_glyphs_p
: 1;
637 /* 1 means this row is a wide as the window it is displayed in, including
638 scroll bars, bitmap areas, and internal borders. This also
639 implies that the row doesn't have marginal areas. */
640 unsigned full_width_p
: 1;
642 /* Non-zero means row is a mode or top-line. */
643 unsigned mode_line_p
: 1;
645 /* 1 in a current row means this row is overlapped by another row. */
646 unsigned overlapped_p
: 1;
648 /* 1 in a current row means this row overlaps others. */
649 unsigned overlapping_p
: 1;
651 /* Continuation lines width at the start of the row. */
652 int continuation_lines_width
;
656 /* Get a pointer to row number ROW in matrix MATRIX. If GLYPH_DEBUG
657 is defined to a non-zero value, the function matrix_row checks that
658 we don't try to access rows that are out of bounds. */
661 struct glyph_row
*matrix_row
P_ ((struct glyph_matrix
*, int));
662 #define MATRIX_ROW(MATRIX, ROW) matrix_row ((MATRIX), (ROW))
664 #define MATRIX_ROW(MATRIX, ROW) ((MATRIX)->rows + (ROW))
667 /* Return a pointer to the row reserved for the mode line in MATRIX.
668 Row MATRIX->nrows - 1 is always reserved for the mode line. */
670 #define MATRIX_MODE_LINE_ROW(MATRIX) \
671 ((MATRIX)->rows + (MATRIX)->nrows - 1)
673 /* Return a pointer to the row reserved for the top line in MATRIX.
674 This is always the first row in MATRIX because that's the only
675 way that works in frame-based redisplay. */
677 #define MATRIX_HEADER_LINE_ROW(MATRIX) (MATRIX)->rows
679 /* Return a pointer to first row in MATRIX used for text display. */
681 #define MATRIX_FIRST_TEXT_ROW(MATRIX) \
682 ((MATRIX)->rows->mode_line_p ? (MATRIX)->rows + 1 : (MATRIX)->rows)
684 /* Return a pointer to the first glyph in the text area of a row.
685 MATRIX is the glyph matrix accessed, and ROW is the row index in
688 #define MATRIX_ROW_GLYPH_START(MATRIX, ROW) \
689 (MATRIX_ROW ((MATRIX), (ROW))->glyphs[TEXT_AREA])
691 /* Return the number of used glyphs in the text area of a row. */
693 #define MATRIX_ROW_USED(MATRIX, ROW) \
694 (MATRIX_ROW ((MATRIX), (ROW))->used[TEXT_AREA])
696 /* Return the character/ byte position at which the display of ROW
699 #define MATRIX_ROW_START_CHARPOS(ROW) ((ROW)->start.pos.charpos)
700 #define MATRIX_ROW_START_BYTEPOS(ROW) ((ROW)->start.pos.bytepos)
702 /* Return character/ byte position at which ROW ends. */
704 #define MATRIX_ROW_END_CHARPOS(ROW) ((ROW)->end.pos.charpos)
705 #define MATRIX_ROW_END_BYTEPOS(ROW) ((ROW)->end.pos.bytepos)
707 /* Return the vertical position of ROW in MATRIX. */
709 #define MATRIX_ROW_VPOS(ROW, MATRIX) ((ROW) - (MATRIX)->rows)
711 /* Return the last glyph row + 1 in MATRIX on window W reserved for
712 text. If W has a mode line, the last row in the matrix is reserved
715 #define MATRIX_BOTTOM_TEXT_ROW(MATRIX, W) \
718 - (WINDOW_WANTS_MODELINE_P ((W)) ? 1 : 0))
720 /* Non-zero if the face of the last glyph in ROW's text area has
721 to be drawn to the end of the text area. */
723 #define MATRIX_ROW_EXTENDS_FACE_P(ROW) ((ROW)->fill_line_p)
725 /* Set and query the enabled_p flag of glyph row ROW in MATRIX. */
727 #define SET_MATRIX_ROW_ENABLED_P(MATRIX, ROW, VALUE) \
728 (MATRIX_ROW ((MATRIX), (ROW))->enabled_p = (VALUE) != 0)
730 #define MATRIX_ROW_ENABLED_P(MATRIX, ROW) \
731 (MATRIX_ROW ((MATRIX), (ROW))->enabled_p)
733 /* Non-zero if ROW displays text. Value is non-zero if the row is
734 blank but displays a line end. */
736 #define MATRIX_ROW_DISPLAYS_TEXT_P(ROW) ((ROW)->displays_text_p)
738 /* Non-zero if ROW is not completely visible in window W. */
740 #define MATRIX_ROW_PARTIALLY_VISIBLE_P(ROW) \
741 ((ROW)->height != (ROW)->visible_height)
743 /* Non-zero if ROW is partially visible at the top of window W. */
745 #define MATRIX_ROW_PARTIALLY_VISIBLE_AT_TOP_P(W, ROW) \
746 (MATRIX_ROW_PARTIALLY_VISIBLE_P ((ROW)) \
747 && (ROW)->y < WINDOW_DISPLAY_HEADER_LINE_HEIGHT ((W)))
749 /* Non-zero if ROW is partially visible at the bottom of window W. */
751 #define MATRIX_ROW_PARTIALLY_VISIBLE_AT_BOTTOM_P(W, ROW) \
752 (MATRIX_ROW_PARTIALLY_VISIBLE_P ((ROW)) \
753 && (ROW)->y + (ROW)->height > WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE ((W)))
755 /* Return the bottom Y + 1 of ROW. */
757 #define MATRIX_ROW_BOTTOM_Y(ROW) ((ROW)->y + (ROW)->height)
759 /* Is ROW the last visible one in the display described by the
760 iterator structure pointed to by IT?. */
762 #define MATRIX_ROW_LAST_VISIBLE_P(ROW, IT) \
763 (MATRIX_ROW_BOTTOM_Y ((ROW)) >= (IT)->last_visible_y)
765 /* Non-zero if ROW displays a continuation line. */
767 #define MATRIX_ROW_CONTINUATION_LINE_P(ROW) \
768 ((ROW)->continuation_lines_width > 0)
770 /* Non-zero if ROW ends in the middle of a character. This is the
771 case for continued lines showing only part of a display table entry
772 or a control char, or an overlay string. */
774 #define MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P(ROW) \
775 ((ROW)->end.dpvec_index >= 0 \
776 || (ROW)->end.overlay_string_index >= 0)
778 /* Non-zero if ROW ends in the middle of an overlay string. */
780 #define MATRIX_ROW_ENDS_IN_OVERLAY_STRING_P(ROW) \
781 ((ROW)->end.overlay_string_index >= 0)
783 /* Non-zero if ROW starts in the middle of a character. See above. */
785 #define MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P(ROW) \
786 ((ROW)->start.dpvec_index >= 0 \
787 || ((ROW)->start.overlay_string_index >= 0 \
788 && (ROW)->start.string_pos.charpos > 0))
790 /* Non-zero means ROW overlaps its predecessor. */
792 #define MATRIX_ROW_OVERLAPS_PRED_P(ROW) \
793 ((ROW)->phys_ascent > (ROW)->ascent)
795 /* Non-zero means ROW overlaps its successor. */
797 #define MATRIX_ROW_OVERLAPS_SUCC_P(ROW) \
798 ((ROW)->phys_height - (ROW)->phys_ascent \
799 > (ROW)->height - (ROW)->ascent)
801 /* Non-zero means that fonts have been loaded since the last glyph
802 matrix adjustments. The function redisplay_internal adjusts glyph
803 matrices when this flag is non-zero. */
805 extern int fonts_changed_p
;
807 /* A glyph for a space. */
809 extern struct glyph space_glyph
;
811 /* Window being updated by update_window. This is non-null as long as
812 update_window has not finished, and null otherwise. It's role is
813 analogous to updating_frame. */
815 extern struct window
*updated_window
;
817 /* Glyph row and area updated by update_window_line. */
819 extern struct glyph_row
*updated_row
;
820 extern int updated_area
;
822 /* Non-zero means reading single-character input with prompt so put
823 cursor on mini-buffer after the prompt. Positive means at end of
824 text in echo area; negative means at beginning of line. */
826 extern int cursor_in_echo_area
;
828 /* Non-zero means last display completed. Zero means it was
831 extern int display_completed
;
833 /* Non-zero means redisplay has been performed directly (see also
834 direct_output_for_insert and direct_output_forward_char), so that
835 no further updating has to be performed. The function
836 redisplay_internal checks this flag, and does nothing but reset it
837 to zero if it is non-zero. */
839 extern int redisplay_performed_directly_p
;
841 /* A temporary storage area, including a row of glyphs. Initialized
842 in xdisp.c. Used for various purposes, as an example see
843 direct_output_for_insert. */
845 extern struct glyph_row scratch_glyph_row
;
849 /************************************************************************
851 ************************************************************************/
853 /* Return the height of the mode line in glyph matrix MATRIX, or zero
854 if not known. This macro is called under circumstances where
855 MATRIX might not have been allocated yet. */
857 #define MATRIX_MODE_LINE_HEIGHT(MATRIX) \
858 ((MATRIX) && (MATRIX)->rows \
859 ? MATRIX_MODE_LINE_ROW (MATRIX)->height \
862 /* Return the height of the top line in glyph matrix MATRIX, or zero
863 if not known. This macro is called under circumstances where
864 MATRIX might not have been allocated yet. */
866 #define MATRIX_HEADER_LINE_HEIGHT(MATRIX) \
867 ((MATRIX) && (MATRIX)->rows \
868 ? MATRIX_HEADER_LINE_ROW (MATRIX)->height \
871 /* Return the current height of the mode line of window W. If not
872 known from W's current glyph matrix, return a default based on the
873 height of the font of the face `modeline'. */
875 #define CURRENT_MODE_LINE_HEIGHT(W) \
876 (MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
877 ? MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
878 : estimate_mode_line_height (XFRAME ((W)->frame), MODE_LINE_FACE_ID))
880 /* Return the current height of the top line of window W. If not
881 known from W's current glyph matrix, return an estimation based on
882 the height of the font of the face `top-line'. */
884 #define CURRENT_HEADER_LINE_HEIGHT(W) \
885 (MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
886 ? MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
887 : estimate_mode_line_height (XFRAME ((W)->frame), HEADER_LINE_FACE_ID))
889 /* Return the height of the desired mode line of window W. */
891 #define DESIRED_MODE_LINE_HEIGHT(W) \
892 MATRIX_MODE_LINE_HEIGHT ((W)->desired_matrix)
894 /* Return the height of the desired top line of window W. */
896 #define DESIRED_HEADER_LINE_HEIGHT(W) \
897 MATRIX_HEADER_LINE_HEIGHT ((W)->desired_matrix)
899 /* Like FRAME_INTERNAL_BORDER_WIDTH but checks whether frame F is a
900 window-system frame. */
902 #define FRAME_INTERNAL_BORDER_WIDTH_SAFE(F) \
903 (FRAME_WINDOW_P (F) ? FRAME_INTERNAL_BORDER_WIDTH (F) : 0)
905 /* Width of display region of window W. For terminal frames, this
906 equals the width of W since there are no vertical scroll bars. For
907 window system frames, the value has to be corrected by the pixel
908 width of vertical scroll bars, and bitmap areas. */
910 #define WINDOW_DISPLAY_PIXEL_WIDTH(W) \
911 (((XFASTINT ((W)->width) \
912 - FRAME_SCROLL_BAR_WIDTH (XFRAME (WINDOW_FRAME ((W)))) \
913 - FRAME_FLAGS_AREA_COLS (XFRAME (WINDOW_FRAME ((W))))) \
914 * CANON_X_UNIT (XFRAME (WINDOW_FRAME ((W))))))
916 /* Height of the display region of W, including a mode line, if any. */
918 #define WINDOW_DISPLAY_PIXEL_HEIGHT(W) \
919 (XFASTINT ((W)->height) \
920 * CANON_Y_UNIT (XFRAME (WINDOW_FRAME ((W)))))
922 /* Height in pixels of the mode line. May be zero if W doesn't have a
925 #define WINDOW_DISPLAY_MODE_LINE_HEIGHT(W) \
926 (WINDOW_WANTS_MODELINE_P ((W)) \
927 ? CURRENT_MODE_LINE_HEIGHT (W) \
930 /* Height in pixels of the top line. Zero if W doesn't have a top
933 #define WINDOW_DISPLAY_HEADER_LINE_HEIGHT(W) \
934 (WINDOW_WANTS_HEADER_LINE_P ((W)) \
935 ? CURRENT_HEADER_LINE_HEIGHT (W) \
938 /* Pixel height of window W without mode line. */
940 #define WINDOW_DISPLAY_HEIGHT_NO_MODE_LINE(W) \
941 (WINDOW_DISPLAY_PIXEL_HEIGHT ((W)) \
942 - WINDOW_DISPLAY_MODE_LINE_HEIGHT ((W)))
944 /* Pixel height of window W without mode and top line. */
946 #define WINDOW_DISPLAY_TEXT_HEIGHT(W) \
947 (WINDOW_DISPLAY_PIXEL_HEIGHT ((W)) \
948 - WINDOW_DISPLAY_MODE_LINE_HEIGHT ((W)) \
949 - WINDOW_DISPLAY_HEADER_LINE_HEIGHT ((W)))
951 /* Left edge of W in pixels relative to its frame. */
953 #define WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X(W) \
954 (FRAME_INTERNAL_BORDER_WIDTH_SAFE (XFRAME (WINDOW_FRAME ((W)))) \
955 + (WINDOW_LEFT_MARGIN ((W)) \
956 * CANON_X_UNIT (XFRAME (WINDOW_FRAME ((W))))) \
957 + FRAME_LEFT_FLAGS_AREA_WIDTH (XFRAME (WINDOW_FRAME ((W)))))
959 /* Right edge of window W in pixels, relative to its frame. */
961 #define WINDOW_DISPLAY_RIGHT_EDGE_PIXEL_X(W) \
962 (WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X ((W)) \
963 + WINDOW_DISPLAY_PIXEL_WIDTH ((W)))
965 /* Top edge of W in pixels relative to its frame. */
967 #define WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y(W) \
968 (FRAME_INTERNAL_BORDER_WIDTH_SAFE (XFRAME (WINDOW_FRAME ((W)))) \
969 + (XFASTINT ((W)->top) \
970 * CANON_Y_UNIT (XFRAME (WINDOW_FRAME ((W))))))
972 /* Bottom edge of window W relative to its frame. */
974 #define WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y(W) \
975 (WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y ((W)) \
976 + WINDOW_DISPLAY_PIXEL_HEIGHT ((W)))
978 /* Convert window W relative pixel X to frame pixel coordinates. */
980 #define WINDOW_TO_FRAME_PIXEL_X(W, X) \
981 ((X) + WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X ((W)))
983 /* Convert window W relative pixel Y to frame pixel coordinates. */
985 #define WINDOW_TO_FRAME_PIXEL_Y(W, Y) \
986 ((Y) + WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y ((W)))
988 /* Convert frame relative pixel X to window relative pixel X. */
990 #define FRAME_TO_WINDOW_PIXEL_X(W, X) \
991 ((X) - WINDOW_DISPLAY_LEFT_EDGE_PIXEL_X ((W)))
993 /* Convert frame relative pixel X to window relative pixel Y. */
995 #define FRAME_TO_WINDOW_PIXEL_Y(W, Y) \
996 ((Y) - WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y ((W)))
998 /* Width of left margin area in pixels. */
1000 #define WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH(W) \
1001 (NILP ((W)->left_margin_width) \
1003 : (XINT ((W)->left_margin_width) \
1004 * CANON_X_UNIT (XFRAME (WINDOW_FRAME ((W))))))
1006 /* Width of right marginal area in pixels. */
1008 #define WINDOW_DISPLAY_RIGHT_AREA_PIXEL_WIDTH(W) \
1009 (NILP ((W)->right_margin_width) \
1011 : (XINT ((W)->right_margin_width) \
1012 * CANON_X_UNIT (XFRAME (WINDOW_FRAME ((W))))))
1014 /* Width of text area in pixels. */
1016 #define WINDOW_DISPLAY_TEXT_AREA_PIXEL_WIDTH(W) \
1017 (WINDOW_DISPLAY_PIXEL_WIDTH ((W)) \
1018 - WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH ((W)) \
1019 - WINDOW_DISPLAY_RIGHT_AREA_PIXEL_WIDTH ((W)))
1021 /* Convert a text area relative x-position in window W to frame X
1022 pixel coordinates. */
1024 #define WINDOW_TEXT_TO_FRAME_PIXEL_X(W, X) \
1025 (WINDOW_TO_FRAME_PIXEL_X ((W), (X)) \
1026 + WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH ((W)))
1028 /* Translate an x-position relative to AREA in window W to frame pixel
1031 #define WINDOW_AREA_TO_FRAME_PIXEL_X(W, AREA, X) \
1032 (WINDOW_TO_FRAME_PIXEL_X ((W), (X)) \
1033 + (((AREA) > LEFT_MARGIN_AREA) \
1034 ? WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH ((W)) \
1036 + (((AREA) > TEXT_AREA) \
1037 ? WINDOW_DISPLAY_TEXT_AREA_PIXEL_WIDTH ((W)) \
1040 /* Return the pixel width of AREA in W. */
1042 #define WINDOW_AREA_PIXEL_WIDTH(W, AREA) \
1043 (((AREA) == TEXT_AREA) \
1044 ? WINDOW_DISPLAY_TEXT_AREA_PIXEL_WIDTH ((W)) \
1045 : (((AREA) == LEFT_MARGIN_AREA) \
1046 ? WINDOW_DISPLAY_LEFT_AREA_PIXEL_WIDTH ((W)) \
1047 : WINDOW_DISPLAY_RIGHT_AREA_PIXEL_WIDTH ((W))))
1049 /* Value is non-zero if window W has a mode line. */
1051 #define WINDOW_WANTS_MODELINE_P(W) \
1052 (!MINI_WINDOW_P (W) \
1053 && !(W)->pseudo_window_p \
1054 && FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (W))) \
1055 && !NILP (XBUFFER ((W)->buffer)->mode_line_format))
1057 /* Value is non-zero if window W wants a top line. */
1059 #define WINDOW_WANTS_HEADER_LINE_P(W) \
1060 (!MINI_WINDOW_P (W) \
1061 && !(W)->pseudo_window_p \
1062 && FRAME_WANTS_MODELINE_P (XFRAME (WINDOW_FRAME (W))) \
1063 && !NILP (XBUFFER ((W)->buffer)->header_line_format))
1066 /***********************************************************************
1068 ***********************************************************************/
1070 /* Indices of face attributes in Lisp face vectors. Slot zero is the
1073 enum lface_attribute_index
1075 LFACE_FAMILY_INDEX
= 1,
1080 LFACE_UNDERLINE_INDEX
,
1081 LFACE_INVERSE_INDEX
,
1082 LFACE_FOREGROUND_INDEX
,
1083 LFACE_BACKGROUND_INDEX
,
1084 LFACE_STIPPLE_INDEX
,
1085 LFACE_OVERLINE_INDEX
,
1086 LFACE_STRIKE_THROUGH_INDEX
,
1092 /* Box types of faces. */
1096 /* No box around text. */
1099 /* Simple box of specified width and color. Default width is 1, and
1100 default color is the foreground color of the face. */
1103 /* Boxes with 3D shadows. Color equals the background color of the
1104 face. Width is specified. */
1110 /* Structure describing a realized face.
1112 For each Lisp face, 0..N realized faces can exist for different
1113 frames and different charsets. Realized faces are built from Lisp
1114 faces and text properties/overlays by merging faces and adding
1115 unspecified attributes from the `default' face. */
1119 /* The id of this face. The id equals the index of this face in the
1120 vector faces_by_id of its face cache. */
1123 #ifdef HAVE_WINDOW_SYSTEM
1125 /* If non-zero, a GC we can use without modification to draw
1126 characters in this face. */
1129 /* Font used for this face, or null if the font could not be loaded
1130 for some reason. This points to a `font' slot of a struct
1131 font_info, and we should not call XFreeFont on it because the
1132 font may still be used somewhere else. */
1135 /* Background stipple or bitmap used for this face. */
1138 #else /* not HAVE_WINDOW_SYSTEM */
1143 #endif /* not HAVE_WINDOW_SYSTEM */
1145 /* Pixel value of foreground color for X frames. Color index
1147 unsigned long foreground
;
1149 /* Pixel value or color index of background color. */
1150 unsigned long background
;
1152 /* Pixel value or color index of underline color. */
1153 unsigned long underline_color
;
1155 /* Pixel value or color index of overlined, strike-through, or box
1157 unsigned long overline_color
;
1158 unsigned long strike_through_color
;
1159 unsigned long box_color
;
1161 /* The font's name. This points to a `name' of a font_info, and it
1162 must not be freed. */
1165 /* The X font registry and encoding of font_name. */
1166 Lisp_Object registry
;
1168 /* Font info ID for this face's font. An ID is stored here because
1169 pointers to font_info structures may change. The reason is that
1170 they are pointers into a font table vector that is itself
1174 /* Fontset ID if this face uses a fontset, or -1. This is only >= 0
1175 if the face was realized for CHARSET_COMPOSITION. For all other
1176 charsets, a specific font is loaded from the set of fonts
1177 specified by the fontset given by the family attribute of the face. */
1180 /* Pixmap width and height. */
1181 unsigned int pixmap_w
, pixmap_h
;
1183 /* Non-zero means characters in this face have a box that thickness
1187 /* Type of box drawn. A value of FACE_NO_BOX means no box is drawn
1188 around text in this face. A value of FACE_SIMPLE_BOX means a box
1189 of width box_line_width is drawn in color box_color. A value of
1190 FACE_RAISED_BOX or FACE_SUNKEN_BOX means a 3D box is drawn with
1191 shadow colors derived from the background color of the face. */
1192 enum face_box_type box
;
1194 /* If `box' above specifies a 3D type, 1 means use box_color for
1196 unsigned use_box_color_for_shadows_p
: 1;
1198 /* The Lisp face attributes this face realizes. All attributes
1199 in this vector are non-nil. */
1200 Lisp_Object lface
[LFACE_VECTOR_SIZE
];
1202 /* The hash value of this face. */
1205 /* The charset for which this face was realized if it was realized
1206 for use in multibyte text. If fontset >= 0, this is
1207 CHARSET_COMPOSITION. A value of charset < 0 means the face was
1208 realized for use in unibyte text where the idea of Emacs
1209 charsets isn't applicable. */
1212 /* Non-zero if text in this face should be underlined, overlined,
1213 strike-through or have a box drawn around it. */
1214 unsigned underline_p
: 1;
1215 unsigned overline_p
: 1;
1216 unsigned strike_through_p
: 1;
1218 /* 1 means that the colors specified for this face could not be
1219 loaded, and were replaced by default colors, so they shouldn't be
1221 unsigned foreground_defaulted_p
: 1;
1222 unsigned background_defaulted_p
: 1;
1224 /* 1 means that either no color is specified for underlining or that
1225 the the specified color couldn't be loaded. Use the foreground
1226 color when drawing in that case. */
1227 unsigned underline_defaulted_p
: 1;
1229 /* 1 means that either no color is specified for the corresponding
1230 attribute or that the the specified color couldn't be loaded.
1231 Use the foreground color when drawing in that case. */
1232 unsigned overline_color_defaulted_p
: 1;
1233 unsigned strike_through_color_defaulted_p
: 1;
1234 unsigned box_color_defaulted_p
: 1;
1236 /* TTY appearances. Blinking is not yet implemented. Colors are
1237 found in `lface' with empty color string meaning the default
1238 color of the TTY. */
1239 unsigned tty_bold_p
: 1;
1240 unsigned tty_dim_p
: 1;
1241 unsigned tty_underline_p
: 1;
1242 unsigned tty_alt_charset_p
: 1;
1243 unsigned tty_reverse_p
: 1;
1244 unsigned tty_blinking_p
: 1;
1246 /* Next and previous face in hash collision list of face cache. */
1247 struct face
*next
, *prev
;
1251 /* Color index indicating that face uses a terminal's default color. */
1253 #define FACE_TTY_DEFAULT_COLOR ((unsigned long) -1)
1255 /* Non-zero if FACE was realized for unibyte use. */
1257 #define FACE_UNIBYTE_P(FACE) ((FACE)->charset < 0)
1260 /* IDs of important faces known by the C face code. These are the IDs
1261 of the faces for CHARSET_ASCII. */
1268 BITMAP_AREA_FACE_ID
,
1269 HEADER_LINE_FACE_ID
,
1274 BASIC_FACE_ID_SENTINEL
1278 /* A cache of realized faces. Each frame has its own cache because
1279 Emacs allows different frame-local face definitions. */
1283 /* Hash table of cached realized faces. */
1284 struct face
**buckets
;
1286 /* Back-pointer to the frame this cache belongs to. */
1289 /* A vector of faces so that faces can be referenced by an ID. */
1290 struct face
**faces_by_id
;
1292 /* The allocated size, and number of used slots of faces_by_id. */
1297 /* Prepare face FACE for use on frame F. This must be called before
1298 using X resources of FACE. */
1300 #define PREPARE_FACE_FOR_DISPLAY(F, FACE) \
1301 if ((FACE)->gc == 0) \
1302 prepare_face_for_display ((F), (FACE)); \
1306 /* Return a pointer to the face with ID on frame F, or null if such a
1307 face doesn't exist. */
1309 #define FACE_FROM_ID(F, ID) \
1310 (((ID) >= 0 && (ID) < FRAME_FACE_CACHE (F)->used) \
1311 ? FRAME_FACE_CACHE (F)->faces_by_id[ID] \
1314 /* Non-zero if FACE is suitable for displaying characters of CHARSET.
1315 CHARSET < 0 means unibyte text. */
1317 #define FACE_SUITABLE_FOR_CHARSET_P(FACE, CHARSET) \
1319 ? (EQ ((FACE)->registry, Vface_default_registry) \
1320 || !NILP (Fequal ((FACE)->registry, Vface_default_registry))) \
1321 : ((FACE)->charset == (CHARSET) \
1322 || ((FACE)->charset == CHARSET_ASCII \
1323 && (CHARSET) == charset_latin_iso8859_1 \
1324 && face_suitable_for_iso8859_1_p ((FACE))) \
1325 || ((FACE)->charset == charset_latin_iso8859_1 \
1326 && (CHARSET) == CHARSET_ASCII))))
1328 /* Return the id of the realized face on frame F that is like the face
1329 with id ID but is suitable for displaying characters of CHARSET.
1330 This macro is only meaningful for CHARSET >= 0, i.e. multibyte
1333 #define FACE_FOR_CHARSET(F, ID, CHARSET) \
1334 (FACE_SUITABLE_FOR_CHARSET_P (FACE_FROM_ID ((F), (ID)), (CHARSET)) \
1336 : lookup_face ((F), FACE_FROM_ID ((F), (ID))->lface, (CHARSET)))
1338 /* The default registry and encoding to use. */
1340 extern Lisp_Object Vface_default_registry
;
1342 /* Non-zero means face attributes have been changed since the last
1343 redisplay. Used in redisplay_internal. */
1345 extern int face_change_count
;
1350 /***********************************************************************
1352 ***********************************************************************/
1354 /* Iteration over things to display in current_buffer or in a string.
1356 The iterator handles:
1358 1. Overlay strings (after-string, before-string).
1360 3. Invisible text properties.
1361 4. Selective display.
1362 5. Translation of characters via display tables.
1363 6. Translation of control characters to the forms `\003' or `^C'.
1364 7. `glyph' and `space-width' properties.
1366 Iterators are initialized by calling init_iterator or one of the
1367 equivalent functions below. A call to get_next_display_element
1368 loads the iterator structure with information about what next to
1369 display. A call to set_iterator_to_next increments the iterator's
1372 Characters from overlay strings, display table entries or control
1373 character translations are returned one at a time. For example, if
1374 we have a text of `a\x01' where `a' has a display table definition
1375 of `cd' and the control character is displayed with a leading
1376 arrow, then the iterator will return:
1378 Call Return Source Call next
1379 -----------------------------------------------------------------
1380 next c display table move
1381 next d display table move
1382 next ^ control char move
1383 next A control char move
1385 The same mechanism is also used to return characters for ellipses
1386 displayed at the end of invisible text.
1388 CAVEAT: Under some circumstances, move_.* functions can be called
1389 asynchronously, e.g. when computing a buffer position from an x and
1390 y pixel position. This means that these functions and functions
1391 called from them SHOULD NOT USE xmalloc and alike. See also the
1392 comment at the start of xdisp.c. */
1394 /* Enumeration describing what kind of display element an iterator is
1395 loaded with after a call to get_next_display_element. */
1397 enum display_element_type
1399 /* A normal character. */
1405 /* A flexible width and height space. */
1408 /* End of buffer or string. */
1411 /* Truncation glyphs. Never returned by get_next_display_element.
1412 Used to get display information about truncation glyphs via
1416 /* Continuation glyphs. See the comment for IT_TRUNCATION. */
1421 /* An enumerator for each text property that has a meaning for display
1431 /* Not a property. Used to indicate changes in overlays. */
1441 /* The window in which we iterate over current_buffer (or a string). */
1445 /* The window's frame. */
1448 /* Function to call to load this structure with the next display
1450 int (* method
) P_ ((struct it
*it
));
1452 /* The next position at which to check for face changes, invisible
1453 text, overlay strings, end of text etc., which see. */
1456 /* Maximum string or buffer position + 1. ZV when iterating over
1460 /* C string to iterate over. Non-null means get characters from
1461 this string, otherwise characters are read from current_buffer
1465 /* Number of characters in the string (s, or it->string) we iterate
1469 /* Start and end of a visible region; -1 if the region is not
1470 visible in the window. */
1471 int region_beg_charpos
, region_end_charpos
;
1473 /* Position at which redisplay end trigger functions should be run. */
1474 int redisplay_end_trigger_charpos
;
1476 /* 1 means multibyte characters are enabled. */
1477 unsigned multibyte_p
: 1;
1479 /* 1 means window has a mode line at its top. */
1480 unsigned header_line_p
: 1;
1482 /* 1 means `string' is the value of a `display' property.
1483 Don't handle some `display' properties in these strings. */
1484 unsigned string_from_display_prop_p
: 1;
1486 /* Display table in effect or null for none. */
1487 struct Lisp_Char_Table
*dp
;
1489 /* Current display table vector to return characters from and its
1490 end. dpvec null means we are not returning characters from a
1491 display table entry; current.dpvec_index gives the current index
1492 into dpvec. This same mechanism is also used to return
1493 characters from translated control characters, i.e. `\003' or
1495 Lisp_Object
*dpvec
, *dpend
;
1497 /* Length in bytes of the char that filled dpvec. A value of zero
1498 means that no character such character is involved. */
1501 /* Face id of the iterator saved in case a glyph from dpvec contains
1502 a face. The face is restored when all glyphs from dpvec have
1506 /* Vector of glyphs for control character translation. The pointer
1507 dpvec is set to ctl_chars when a control character is translated.
1508 This vector is also used for incomplete multibyte character
1509 translation (e.g \222\244). Such a character is at most 3 bytes,
1510 thus we need at most 12 bytes here. */
1511 Lisp_Object ctl_chars
[12];
1513 /* Current buffer or string position of the iterator, including
1514 position in overlay strings etc. */
1515 struct display_pos current
;
1517 /* Vector of overlays to process. Overlay strings are processed
1518 OVERLAY_STRING_CHUNK_SIZE at a time. */
1519 #define OVERLAY_STRING_CHUNK_SIZE 3
1520 Lisp_Object overlay_strings
[OVERLAY_STRING_CHUNK_SIZE
];
1522 /* Total number of overlay strings to process. This can be >
1523 OVERLAY_STRING_CHUNK_SIZE. */
1524 int n_overlay_strings
;
1526 /* If non-nil, a Lisp string being processed. If
1527 current.overlay_string_index >= 0, this is an overlay string from
1531 /* Stack of saved values. New entries are pushed when we begin to
1532 process an overlay string or a string from a `glyph' property.
1533 Entries are popped when we return to deliver display elements
1534 from what we previously had. */
1535 struct iterator_stack_entry
1540 struct display_pos pos
;
1543 enum glyph_row_area area
;
1544 unsigned multibyte_p
: 1;
1545 unsigned string_from_display_prop_p
: 1;
1546 Lisp_Object space_width
;
1548 Lisp_Object font_height
;
1552 /* Stack pointer. */
1555 /* Setting of buffer-local variable selective-display-ellipsis. */
1556 unsigned selective_display_ellipsis_p
: 1;
1558 /* 1 means control characters are translated into the form `^C'
1559 where the `^' can be replaced by a display table entry. */
1560 unsigned ctl_arrow_p
: 1;
1562 /* -1 means selective display hides everything between a \r and the
1563 next newline; > 0 means hide lines indented more than that value. */
1566 /* An enumeration describing what the next display element is
1567 after a call to get_next_display_element. */
1568 enum display_element_type what
;
1573 /* Non-zero means that the current face has a box. */
1574 unsigned face_box_p
: 1;
1576 /* Non-null means that the current character is the first in a run
1577 of characters with box face. */
1578 unsigned start_of_box_run_p
: 1;
1580 /* Non-zero means that the current character is the last in a run
1581 of characters with box face. */
1582 unsigned end_of_box_run_p
: 1;
1584 /* 1 means overlay strings at end_charpos have been processed. */
1585 unsigned overlay_strings_at_end_processed_p
: 1;
1587 /* The ID of the default face to use. One of DEFAULT_FACE_ID,
1588 MODE_LINE_FACE_ID, or TOOL_BAR_FACE_ID, depending on what we
1592 /* If what == IT_CHARACTER, character and length in bytes. This is
1593 a character from a buffer or string. It may be different from
1594 the character displayed in case that
1595 unibyte_display_via_language_environment is set. */
1598 /* The character to display, possibly translated to multibyte
1599 if unibyte_display_via_language_environment is set. This
1600 is set after x_produce_glyphs has been called. */
1601 int char_to_display
;
1603 /* Charset for which face_id was computed. This is the charset
1604 of char_to_display after x_produce_glyphs has been called. */
1607 /* If what == IT_IMAGE, the id of the image to display. */
1610 /* Value of the `space-width' property, if any; nil if none. */
1611 Lisp_Object space_width
;
1613 /* Computed from the value of the `raise' property. */
1616 /* Value of the `height' property, if any; nil if none. */
1617 Lisp_Object font_height
;
1619 /* Object and position where the current display element came from.
1620 Object can be a Lisp string in case the current display element
1621 comes from an overlay string, or it is buffer. Position is
1622 a position in object. */
1624 struct text_pos position
;
1626 /* 1 means lines are truncated. */
1627 unsigned truncate_lines_p
: 1;
1629 /* Number of columns per \t. */
1632 /* Width in pixels of truncation and continuation glyphs. */
1633 short truncation_pixel_width
, continuation_pixel_width
;
1635 /* First and last visible x-position in the display area. If window
1636 is hscrolled by n columns, first_visible_x == n * CANON_X_UNIT
1637 (f), and last_visible_x == pixel width of W + first_visible_x. */
1638 int first_visible_x
, last_visible_x
;
1640 /* Last visible y-position + 1 in the display area without a mode
1641 line, if the window has one. */
1644 /* Width of a prompt in front of the line. Used to perform tab
1645 calculations. The x on which tab calculations are based is
1646 current_x - prompt_width + continuation_lines_width. */
1649 /* If non-null, glyphs are produced in glyph_row with each call to
1651 struct glyph_row
*glyph_row
;
1653 /* The area of glyph_row to which glyphs are added. */
1654 enum glyph_row_area area
;
1656 /* Number of glyphs needed for the last character requested via
1657 produce_glyphs. This is 1 except for tabs. */
1660 /* Width of the display element in pixels. Result of
1664 /* Current, maximum logical, and maximum physical line height
1665 information. Result of produce_glyphs. */
1666 int ascent
, descent
, max_ascent
, max_descent
;
1667 int phys_ascent
, phys_descent
, max_phys_ascent
, max_phys_descent
;
1669 /* Current x pixel position within the display line. This value
1670 does not include the width of continuation lines in front of the
1671 line. The value of current_x is automatically incremented by
1672 pixel_width with each call to produce_glyphs. */
1675 /* Accumulated width of continuation lines. If > 0, this means we
1676 are currently in a continuation line. This is initially zero and
1677 incremented/reset by display_line, move_it_to etc. */
1678 int continuation_lines_width
;
1680 /* Current y-position. Automatically incremented by the height of
1681 glyph_row in move_it_to and display_line. */
1684 /* Current vertical matrix position, or line number. Automatically
1685 incremented by move_it_to and display_line. */
1688 /* Horizontal matrix position reached in move_it_in_display_line.
1689 Only set there, not in display_line. */
1694 /* Access to positions of iterator IT. */
1696 #define IT_CHARPOS(IT) CHARPOS ((IT).current.pos)
1697 #define IT_BYTEPOS(IT) BYTEPOS ((IT).current.pos)
1698 #define IT_STRING_CHARPOS(IT) CHARPOS ((IT).current.string_pos)
1699 #define IT_STRING_BYTEPOS(IT) BYTEPOS ((IT).current.string_pos)
1701 /* Test if IT has reached the end of its buffer or string. This will
1702 only work after get_next_display_element has been called. */
1704 #define ITERATOR_AT_END_P(IT) ((IT)->what == IT_EOB)
1706 /* Non-zero means IT is at the end of a line. This is the case if it
1707 is either on a newline or on a carriage return and selective
1708 display hides the rest of the line. */
1710 #define ITERATOR_AT_END_OF_LINE_P(IT) \
1711 ((IT)->what == IT_CHARACTER \
1712 && ((IT)->c == '\n' \
1713 || ((IT)->c == '\r' && (IT)->selective)))
1715 /* Call produce_glyphs or produce_glyphs_hook, if set. Shortcut to
1716 avoid the function call overhead. */
1718 #define PRODUCE_GLYPHS(IT) \
1720 ? rif->produce_glyphs ((IT)) \
1721 : produce_glyphs ((IT)))
1723 /* Bit-flags indicating what operation move_it_to should perform. */
1725 enum move_operation_enum
1727 /* Stop if specified x-position is reached. */
1730 /* Stop if specified y-position is reached. */
1733 /* Stop if specified vpos is reached. */
1734 MOVE_TO_VPOS
= 0x04,
1736 /* Stop if specified buffer or string position is reached. */
1742 /***********************************************************************
1743 Window-based redisplay interface
1744 ***********************************************************************/
1746 /* Structure used to describe runs of lines that must be scrolled. */
1750 /* Source and destination y pixel position. */
1751 int desired_y
, current_y
;
1753 /* Source and destination vpos in matrix. */
1754 int desired_vpos
, current_vpos
;
1756 /* Height in pixels, number of glyph rows. */
1761 /* Structure holding system-dependent interface functions needed
1762 for window-based redisplay. */
1764 struct redisplay_interface
1766 /* Produce glyphs/get display metrics for the display element IT is
1768 void (*produce_glyphs
) P_ ((struct it
*it
));
1770 /* Write or insert LEN glyphs from STRING at the nominal output
1772 void (*write_glyphs
) P_ ((struct glyph
*string
, int len
));
1773 void (*insert_glyphs
) P_ ((struct glyph
*start
, int len
));
1775 /* Clear from nominal output position to X. X < 0 means clear
1776 to right end of display. */
1777 void (*clear_end_of_line
) P_ ((int x
));
1779 /* Function to call to scroll the display as described by RUN on
1781 void (*scroll_run_hook
) P_ ((struct window
*w
, struct run
*run
));
1783 /* Function to call after a line in a display has been completely
1784 updated. Used to draw truncation marks and alike. DESIRED_ROW
1785 is the desired row which has been updated. */
1786 void (*after_update_window_line_hook
) P_ ((struct glyph_row
*desired_row
));
1788 /* Function to call before beginning to update window W in
1789 window-based redisplay. */
1790 void (*update_window_begin_hook
) P_ ((struct window
*w
));
1792 /* Function to call after window W has been updated in window-based
1793 redisplay. CURSOR_ON_P non-zero means switch cursor on. */
1794 void (*update_window_end_hook
) P_ ((struct window
*w
, int cursor_on_p
));
1796 /* Move cursor to row/column position VPOS/HPOS, pixel coordinates
1797 Y/X. HPOS/VPOS are window-relative row and column numbers and X/Y
1798 are window-relative pixel positions. */
1799 void (*cursor_to
) P_ ((int vpos
, int hpos
, int y
, int x
));
1801 /* Flush the display of frame F. For X, this is XFlush. */
1802 void (*flush_display
) P_ ((struct frame
*f
));
1804 /* Set *LEFT and *RIGHT to the left and right overhang of GLYPH on
1806 void (*get_glyph_overhangs
) P_ ((struct glyph
*glyph
, struct frame
*f
,
1807 int *left
, int *right
));
1809 /* Fix the display of AREA of ROW in window W for overlapping rows.
1810 This function is called from redraw_overlapping_rows after
1811 desired rows have been made current. */
1812 void (*fix_overlapping_area
) P_ ((struct window
*w
, struct glyph_row
*row
,
1813 enum glyph_row_area area
));
1816 /* The current interface for window-based redisplay. */
1818 extern struct redisplay_interface
*rif
;
1820 /* Hook to call in estimate_mode_line_height. */
1822 extern int (* estimate_mode_line_height_hook
) P_ ((struct frame
*,
1826 /***********************************************************************
1828 ***********************************************************************/
1830 #ifdef HAVE_X_WINDOWS
1832 /* Structure forward declarations. */
1837 /* Each image format (JPEG, IIFF, ...) supported is described by
1838 a structure of the type below. */
1842 /* A symbol uniquely identifying the image type, .e.g `jpeg'. */
1845 /* Check that SPEC is a valid image specification for the given
1846 image type. Value is non-zero if SPEC is valid. */
1847 int (* valid_p
) P_ ((Lisp_Object spec
));
1849 /* Load IMG which is used on frame F from information contained in
1850 IMG->spec. Value is non-zero if successful. */
1851 int (* load
) P_ ((struct frame
*f
, struct image
*img
));
1853 /* Free resources of image IMG which is used on frame F. */
1854 void (* free
) P_ ((struct frame
*f
, struct image
*img
));
1856 /* Next in list of all supported image types. */
1857 struct image_type
*next
;
1861 /* Structure describing an image. Specific image formats like XBM are
1862 converted into this form, so that display only has to deal with
1863 this type of image. */
1867 /* The time in seconds at which the image was last displayed. Set
1868 in prepare_image_for_display. */
1869 unsigned long timestamp
;
1871 /* Pixmaps of the image. */
1872 Pixmap pixmap
, mask
;
1874 /* Colors allocated for this image, if any. Allocated via xmalloc. */
1875 unsigned long *colors
;
1878 /* Width and height of the image. */
1881 /* These values are used for the rectangles displayed for images
1882 that can't be loaded. */
1883 #define DEFAULT_IMAGE_WIDTH 30
1884 #define DEFAULT_IMAGE_HEIGHT 30
1886 /* Percent of image height used as ascent. */
1888 #define DEFAULT_IMAGE_ASCENT 50
1890 /* Lisp specification of this image. */
1893 /* Relief to draw around the image. */
1896 /* Optional margin around the image. This includes the relief. */
1899 /* Reference to the type of the image. */
1900 struct image_type
*type
;
1902 /* A place for image types to store additional data. The member
1903 data.lisp_val is marked during GC, so it's safe to store Lisp data
1904 there. Image types should free this data when their `free'
1905 function is called. */
1910 Lisp_Object lisp_val
;
1913 /* Hash value of image specification to speed up comparisons. */
1916 /* Image id of this image. */
1919 /* Hash collision chain. */
1920 struct image
*next
, *prev
;
1924 /* Cache of images. Each frame has a cache. X frames with the same
1925 x_display_info share their caches. */
1929 /* Hash table of images. */
1930 struct image
**buckets
;
1932 /* Vector mapping image ids to images. */
1933 struct image
**images
;
1935 /* Allocated size of `images'. */
1938 /* Number of images in the cache. */
1941 /* Reference count (number of frames sharing this cache). */
1946 /* Value is the ascent of image IMG. */
1948 #define IMAGE_ASCENT(IMG) \
1949 (((IMG)->height + (IMG)->margin) * (IMG)->ascent / 100.0)
1951 /* Value is a pointer to the image with id ID on frame F, or null if
1952 no image with that id exists. */
1954 #define IMAGE_FROM_ID(F, ID) \
1955 (((ID) >= 0 && (ID) < (FRAME_X_IMAGE_CACHE (F)->used)) \
1956 ? FRAME_X_IMAGE_CACHE (F)->images[ID] \
1959 /* Size of bucket vector of image caches. Should be prime. */
1961 #define IMAGE_CACHE_BUCKETS_SIZE 1001
1963 #endif /* HAVE_X_WINDOWS */
1967 /***********************************************************************
1969 ***********************************************************************/
1971 /* Enumeration defining where to find tool-bar item information in
1972 tool-bar items vectors stored with frames. Each tool-bar item
1973 occupies TOOL_BAR_ITEM_NSLOTS elements in such a vector. */
1975 enum tool_bar_item_idx
1977 /* The key of the tool-bar item. Used to remove items when a binding
1978 for `undefined' is found. */
1981 /* Non-nil if item is enabled. */
1982 TOOL_BAR_ITEM_ENABLED_P
,
1984 /* Non-nil if item is selected (pressed). */
1985 TOOL_BAR_ITEM_SELECTED_P
,
1988 TOOL_BAR_ITEM_CAPTION
,
1990 /* Image(s) to display. This is either a single image specification
1991 or a vector of specifications. */
1992 TOOL_BAR_ITEM_IMAGES
,
1995 TOOL_BAR_ITEM_BINDING
,
1997 /* Button type. One of nil, `:radio' or `:toggle'. */
2003 /* Sentinel = number of slots in tool_bar_items occupied by one
2005 TOOL_BAR_ITEM_NSLOTS
2009 /* An enumeration for the different images that can be specified
2010 for a tool-bar item. */
2012 enum tool_bar_item_image
2014 TOOL_BAR_IMAGE_ENABLED_SELECTED
,
2015 TOOL_BAR_IMAGE_ENABLED_DESELECTED
,
2016 TOOL_BAR_IMAGE_DISABLED_SELECTED
,
2017 TOOL_BAR_IMAGE_DISABLED_DESELECTED
2020 /* Non-zero means raise tool-bar buttons when the mouse moves over them. */
2022 extern int auto_raise_tool_bar_buttons_p
;
2024 /* Margin around tool-bar buttons in pixels. */
2026 extern int tool_bar_button_margin
;
2028 /* Thickness of relief to draw around tool-bar buttons. */
2030 extern int tool_bar_button_relief
;
2034 /***********************************************************************
2036 ***********************************************************************/
2038 /* Defined in xdisp.c */
2040 int resize_mini_window
P_ ((struct window
*));
2041 int try_window
P_ ((Lisp_Object
, struct text_pos
));
2042 void window_box
P_ ((struct window
*, int, int *, int *, int *, int *));
2043 int window_box_height
P_ ((struct window
*));
2044 int window_text_bottom_y
P_ ((struct window
*));
2045 int window_box_width
P_ ((struct window
*, int));
2046 int window_box_left
P_ ((struct window
*, int));
2047 int window_box_right
P_ ((struct window
*, int));
2048 void window_box_edges
P_ ((struct window
*, int, int *, int *, int *, int *));
2049 void mark_window_display_accurate
P_ ((Lisp_Object
, int));
2050 void redisplay_preserve_echo_area
P_ ((void));
2051 void set_cursor_from_row
P_ ((struct window
*, struct glyph_row
*,
2052 struct glyph_matrix
*, int, int, int, int));
2053 void init_iterator
P_ ((struct it
*, struct window
*, int,
2054 int, struct glyph_row
*, enum face_id
));
2055 void init_iterator_to_row_start
P_ ((struct it
*, struct window
*,
2056 struct glyph_row
*));
2057 int get_next_display_element
P_ ((struct it
*));
2058 void set_iterator_to_next
P_ ((struct it
*));
2059 void produce_glyphs
P_ ((struct it
*));
2060 void produce_special_glyphs
P_ ((struct it
*, enum display_element_type
));
2061 void start_display
P_ ((struct it
*, struct window
*, struct text_pos
));
2062 void move_it_to
P_ ((struct it
*, int, int, int, int, int));
2063 void move_it_vertically
P_ ((struct it
*, int));
2064 void move_it_by_lines
P_ ((struct it
*, int, int));
2065 int frame_mode_line_height
P_ ((struct frame
*));
2066 void highlight_trailing_whitespace
P_ ((struct frame
*, struct glyph_row
*));
2067 int tool_bar_item_info
P_ ((struct frame
*, struct glyph
*, int *));
2068 extern Lisp_Object Qtool_bar
;
2069 extern Lisp_Object Vshow_trailing_whitespace
;
2070 extern int redisplaying_p
;
2072 /* Defined in sysdep.c */
2074 void get_frame_size
P_ ((int *, int *));
2075 void request_sigio
P_ ((void));
2076 void unrequest_sigio
P_ ((void));
2077 int tabs_safe_p
P_ ((void));
2078 void init_baud_rate
P_ ((void));
2079 void init_sigio
P_ ((int));
2081 /* Defined in xface.c */
2083 void update_face_from_frame_parameter
P_ ((struct frame
*, Lisp_Object
,
2085 char *x_charset_registry
P_ ((int));
2086 void clear_face_cache
P_ ((int));
2087 unsigned long load_color
P_ ((struct frame
*, struct face
*, Lisp_Object
,
2088 enum lface_attribute_index
));
2089 void unload_color
P_ ((struct frame
*, unsigned long));
2090 int frame_update_line_height
P_ ((struct frame
*));
2091 int ascii_face_of_lisp_face
P_ ((struct frame
*, int));
2092 void prepare_face_for_display
P_ ((struct frame
*, struct face
*));
2093 int face_suitable_for_iso8859_1_p
P_ ((struct face
*));
2094 int xstricmp
P_ ((unsigned char *, unsigned char *));
2095 int lookup_face
P_ ((struct frame
*, Lisp_Object
*, int));
2096 int face_suitable_for_charset_p
P_ ((struct face
*, int));
2097 int lookup_named_face
P_ ((struct frame
*, Lisp_Object
, int));
2098 int smaller_face
P_ ((struct frame
*, int, int));
2099 int face_with_height
P_ ((struct frame
*, int, int));
2100 int lookup_derived_face
P_ ((struct frame
*, Lisp_Object
, int, int));
2101 void init_frame_faces
P_ ((struct frame
*));
2102 void free_frame_faces
P_ ((struct frame
*));
2103 void recompute_basic_faces
P_ ((struct frame
*));
2104 int face_at_buffer_position
P_ ((struct window
*, int, int, int, int *,
2106 int face_at_string_position
P_ ((struct window
*, Lisp_Object
,
2107 int, int, int, int, int *, enum face_id
));
2108 int compute_char_face
P_ ((struct frame
*, int, Lisp_Object
));
2109 void free_all_realized_faces
P_ ((Lisp_Object
));
2110 extern Lisp_Object Qforeground_color
, Qbackground_color
;
2112 /* Defined in xfns.c */
2114 #ifdef HAVE_X_WINDOWS
2116 int x_screen_planes
P_ ((struct frame
*));
2117 void x_implicitly_set_name
P_ ((struct frame
*, Lisp_Object
, Lisp_Object
));
2118 struct image_cache
*make_image_cache
P_ ((void));
2119 void free_image_cache
P_ ((struct frame
*));
2120 void clear_image_cache
P_ ((struct frame
*, int));
2121 void forall_images_in_image_cache
P_ ((struct frame
*,
2122 void (*) P_ ((struct image
*))));
2123 int valid_image_p
P_ ((Lisp_Object
));
2124 void prepare_image_for_display
P_ ((struct frame
*, struct image
*));
2125 int lookup_image
P_ ((struct frame
*, Lisp_Object
));
2126 extern struct frame
*tip_frame
;
2127 extern Window tip_window
;
2128 EXFUN (Fx_show_tip
, 4);
2129 EXFUN (Fx_hide_tip
, 0);
2130 EXFUN (Fx_show_busy_cursor
, 0);
2131 EXFUN (Fx_hide_busy_cursor
, 1);
2132 extern int inhibit_busy_cursor
;
2133 extern int display_busy_cursor_p
;
2135 #endif /* HAVE_X_WINDOWS */
2138 /* Defined in xmenu.c */
2140 int popup_activated
P_ ((void));
2142 /* Defined in dispnew.c */
2144 int estimate_mode_line_height
P_ ((struct frame
*, enum face_id
));
2145 Lisp_Object mode_line_string
P_ ((struct window
*, int, int, int, int *));
2146 extern void redraw_frame
P_ ((struct frame
*));
2147 extern void redraw_garbaged_frames
P_ ((void));
2148 extern void cancel_line
P_ ((int, struct frame
*));
2149 extern void init_desired_glyphs
P_ ((struct frame
*));
2150 extern int scroll_frame_lines
P_ ((struct frame
*, int, int, int, int));
2151 extern int direct_output_for_insert
P_ ((int));
2152 extern int direct_output_forward_char
P_ ((int));
2153 extern int update_frame
P_ ((struct frame
*, int, int));
2154 extern int scrolling
P_ ((struct frame
*));
2155 extern void bitch_at_user
P_ ((void));
2156 void adjust_glyphs
P_ ((struct frame
*));
2157 void free_glyphs
P_ ((struct frame
*));
2158 void free_window_matrices
P_ ((struct window
*));
2159 void check_glyph_memory
P_ ((void));
2160 void mirrored_line_dance
P_ ((struct glyph_matrix
*, int, int, int *, char *));
2161 void clear_glyph_matrix
P_ ((struct glyph_matrix
*));
2162 void clear_current_matrices
P_ ((struct frame
*f
));
2163 void clear_desired_matrices
P_ ((struct frame
*));
2164 void shift_glyph_matrix
P_ ((struct window
*, struct glyph_matrix
*,
2166 void rotate_matrix
P_ ((struct glyph_matrix
*, int, int, int));
2167 void increment_glyph_matrix_buffer_positions
P_ ((struct glyph_matrix
*,
2168 int, int, int, int));
2169 void blank_row
P_ ((struct window
*, struct glyph_row
*, int));
2170 void increment_glyph_row_buffer_positions
P_ ((struct glyph_row
*, int, int));
2171 void enable_glyph_matrix_rows
P_ ((struct glyph_matrix
*, int, int, int));
2172 void clear_glyph_row
P_ ((struct glyph_row
*));
2173 void prepare_desired_row
P_ ((struct glyph_row
*));
2174 int line_hash_code
P_ ((struct glyph_row
*));
2175 void set_window_update_flags
P_ ((struct window
*, int));
2176 void write_glyphs
P_ ((struct glyph
*, int));
2177 void insert_glyphs
P_ ((struct glyph
*, int));
2178 void redraw_frame
P_ ((struct frame
*));
2179 void redraw_garbaged_frames
P_ ((void));
2180 int scroll_cost
P_ ((struct frame
*, int, int, int));
2181 int direct_output_for_insert
P_ ((int));
2182 int direct_output_forward_char
P_ ((int));
2183 int update_frame
P_ ((struct frame
*, int, int));
2184 void update_single_window
P_ ((struct window
*, int));
2185 int scrolling
P_ ((struct frame
*));
2186 int buffer_posn_from_coords
P_ ((struct window
*, int *, int *));
2187 void do_pending_window_change
P_ ((int));
2188 void change_frame_size
P_ ((struct frame
*, int, int, int, int, int));
2189 void bitch_at_user
P_ ((void));
2190 Lisp_Object sit_for
P_ ((int, int, int, int, int));
2191 void init_display
P_ ((void));
2192 void syms_of_display
P_ ((void));
2194 /* Defined in term.c */
2196 extern void ring_bell
P_ ((void));
2197 extern void set_terminal_modes
P_ ((void));
2198 extern void reset_terminal_modes
P_ ((void));
2199 extern void update_begin
P_ ((struct frame
*));
2200 extern void update_end
P_ ((struct frame
*));
2201 extern void set_terminal_window
P_ ((int));
2202 extern void set_scroll_region
P_ ((int, int));
2203 extern void turn_off_insert
P_ ((void));
2204 extern void turn_off_highlight
P_ ((void));
2205 extern void background_highlight
P_ ((void));
2206 extern void reassert_line_highlight
P_ ((int, int));
2207 extern void clear_frame
P_ ((void));
2208 extern void clear_end_of_line
P_ ((int));
2209 extern void clear_end_of_line_raw
P_ ((int));
2210 extern void delete_glyphs
P_ ((int));
2211 extern void ins_del_lines
P_ ((int, int));
2212 extern int string_cost
P_ ((char *));
2213 extern int per_line_cost
P_ ((char *));
2214 extern void calculate_costs
P_ ((struct frame
*));
2215 extern void term_init
P_ ((char *));
2216 extern void fatal
P_ ((/* char *, ... */));
2217 void cursor_to
P_ ((int, int));
2218 void change_line_highlight
P_ ((int, int, int, int));
2220 /* Defined in scroll.c */
2222 extern int scrolling_max_lines_saved
P_ ((int, int, int *, int *, int *));
2223 extern int scroll_cost
P_ ((struct frame
*, int, int, int));
2224 extern void do_line_insertion_deletion_costs
P_ ((struct frame
*, char *,
2225 char *, char *, char *,
2226 char *, char *, int));
2227 void scrolling_1
P_ ((struct frame
*, int, int, int, int *, int *, int *,
2230 #endif /* not DISPEXTERN_H_INCLUDED */