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/* Interface definitions for display code.
Copyright (C) 1985, 1993, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs. If not, see <>. */
/* New redisplay written by Gerd Moellmann <>. */
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#endif /* USE_X_TOOLKIT */
#else /* !HAVE_X_WINDOWS */
/* X-related stuff used by non-X gui code. */
typedef struct {
unsigned long pixel;
unsigned short red, green, blue;
char flags;
char pad;
} XColor;
#endif /* HAVE_X_WINDOWS */
#ifdef MSDOS
#include "msdos.h"
typedef struct x_display_info Display_Info;
typedef XImage * XImagePtr;
typedef XImagePtr XImagePtr_or_DC;
#define NativeRectangle XRectangle
#include "w32gui.h"
typedef struct w32_display_info Display_Info;
typedef XImage *XImagePtr;
typedef HDC XImagePtr_or_DC;
#ifdef HAVE_NS
#include "nsgui.h"
/* Following typedef needed to accommodate the MSDOS port, believe it or not. */
typedef struct ns_display_info Display_Info;
typedef Pixmap XImagePtr;
typedef XImagePtr XImagePtr_or_DC;
#ifndef NativeRectangle
#define NativeRectangle int
/* Structure forward declarations. Some are here because function
prototypes below reference structure types before their definition
in this file. Some are here because not every file including
dispextern.h also includes frame.h and windows.h. */
struct glyph;
struct glyph_row;
struct glyph_matrix;
struct glyph_pool;
struct frame;
struct window;
/* Values returned from coordinates_in_window. */
enum window_part
/* Number of bits allocated to store fringe bitmap numbers. */
#define FRINGE_ID_BITS 16
/* Number of bits allocated to store fringe bitmap height. */
/* If GLYPH_DEBUG is non-zero, additional checks are activated. Turn
it off by defining the macro GLYPH_DEBUG to zero. */
#define GLYPH_DEBUG 0
/* If XASSERTS is non-zero, additional consistency checks are activated.
Turn it off by defining the macro XASSERTS to zero. */
#ifndef XASSERTS
#define XASSERTS 0
/* Macros to include code only if GLYPH_DEBUG != 0. */
#define IF_DEBUG(X) X
#define IF_DEBUG(X) (void) 0
#define xassert(X) do {if (!(X)) abort ();} while (0)
#define xassert(X) (void) 0
/* Macro for displaying traces of redisplay. If Emacs was compiled
with GLYPH_DEBUG != 0, the variable trace_redisplay_p can be set to
a non-zero value in debugging sessions to activate traces. */
extern int trace_redisplay_p;
#include <stdio.h>
#define TRACE(X) \
if (trace_redisplay_p) \
fprintf X; \
else \
(void) 0
#else /* GLYPH_DEBUG == 0 */
#define TRACE(X) (void) 0
#endif /* GLYPH_DEBUG == 0 */
Text positions
/* Starting with Emacs 20.3, characters from strings and buffers have
both a character and a byte position associated with them. The
following structure holds such a pair of positions. */
struct text_pos
/* Character position. */
EMACS_INT charpos;
/* Corresponding byte position. */
EMACS_INT bytepos;
/* Access character and byte position of POS in a functional form. */
#define BYTEPOS(POS) (POS).bytepos
#define CHARPOS(POS) (POS).charpos
/* Set character position of POS to CHARPOS, byte position to BYTEPOS. */
((POS).charpos = (CHARPOS), (POS).bytepos = BYTEPOS)
/* Increment text position POS. */
do \
{ \
++(POS).charpos; \
INC_POS ((POS).bytepos); \
else \
++(POS).bytepos; \
} \
while (0)
/* Decrement text position POS. */
do \
{ \
--(POS).charpos; \
DEC_POS ((POS).bytepos); \
else \
--(POS).bytepos; \
} \
while (0)
/* Set text position POS from marker MARKER. */
(CHARPOS (POS) = marker_position ((MARKER)), \
BYTEPOS (POS) = marker_byte_position ((MARKER)))
/* Set marker MARKER from text position POS. */
set_marker_both ((MARKER), Qnil, CHARPOS ((POS)), BYTEPOS ((POS)))
/* Value is non-zero if character and byte positions of POS1 and POS2
are equal. */
#define TEXT_POS_EQUAL_P(POS1, POS2) \
((POS1).charpos == (POS2).charpos \
&& (POS1).bytepos == (POS2).bytepos)
/* When rendering glyphs, redisplay scans string or buffer text,
overlay strings in that text, and does display table or control
character translations. The following structure captures a
position taking all this into account. */
struct display_pos
/* Buffer or string position. */
struct text_pos pos;
/* If this is a position in an overlay string, overlay_string_index
is the index of that overlay string in the sequence of overlay
strings at `pos' in the order redisplay processes them. A value
< 0 means that this is not a position in an overlay string. */
int overlay_string_index;
/* If this is a position in an overlay string, string_pos is the
position within that string. */
struct text_pos string_pos;
/* If the character at the position above is a control character or
has a display table entry, dpvec_index is an index in the display
table or control character translation of that character. A
value < 0 means this is not a position in such a translation. */
int dpvec_index;
/* Enumeration of glyph types. Glyph structures contain a type field
containing one of the enumerators defined here. */
enum glyph_type
/* Glyph describes a character. */
/* Glyph describes a static composition. */
/* Glyph describes an image. */
/* Glyph is a space of fractional width and/or height. */
/* Structure describing how to use partial glyphs (images slicing) */
struct glyph_slice
unsigned x : 16;
unsigned y : 16;
unsigned width : 16;
unsigned height : 16;
/* Glyphs.
Be extra careful when changing this structure! Esp. make sure that
functions producing glyphs, like append_glyph, fill ALL of the
glyph structure, and that GLYPH_EQUAL_P compares all
display-relevant members of glyphs (not to imply that these are the
only things to check when you add a member). */
struct glyph
/* Position from which this glyph was drawn. If `object' below is a
Lisp string, this is a position in that string. If it is a
buffer, this is a position in that buffer. A value of -1
together with a null object means glyph is a truncation glyph at
the start of a row. */
EMACS_INT charpos;
/* Lisp object source of this glyph. Currently either a buffer or
a string, if the glyph was produced from characters which came from
a buffer or a string; or 0 if the glyph was inserted by redisplay
for its own purposes such as padding. */
Lisp_Object object;
/* Width in pixels. */
short pixel_width;
/* Ascent and descent in pixels. */
short ascent, descent;
/* Vertical offset. If < 0, the glyph is displayed raised, if > 0
the glyph is displayed lowered. */
short voffset;
/* Which kind of glyph this is---character, image etc. Value
should be an enumerator of type enum glyph_type. */
unsigned type : 2;
/* 1 means this glyph was produced from multibyte text. Zero
means it was produced from unibyte text, i.e. charsets aren't
applicable, and encoding is not performed. */
unsigned multibyte_p : 1;
/* Non-zero means draw a box line at the left or right side of this
glyph. This is part of the implementation of the face attribute
`:box'. */
unsigned left_box_line_p : 1;
unsigned right_box_line_p : 1;
/* Non-zero means this glyph's physical ascent or descent is greater
than its logical ascent/descent, i.e. it may potentially overlap
glyphs above or below it. */
unsigned overlaps_vertically_p : 1;
/* For terminal frames, 1 means glyph is a padding glyph. Padding
glyphs are used for characters whose visual shape consists of
more than one glyph (e.g. Asian characters). All but the first
glyph of such a glyph sequence have the padding_p flag set. This
flag is used only to minimize code changes. A better way would
probably be to use the width field of glyphs to express padding.
For graphic frames, 1 means the pixel width of the glyph in a
font is 0, but 1-pixel is padded on displaying for correct cursor
displaying. The member `pixel_width' above is set to 1. */
unsigned padding_p : 1;
/* 1 means the actual glyph is not available, draw a box instead.
This can happen when a font couldn't be loaded, or a character
doesn't have a glyph in a font. */
unsigned glyph_not_available_p : 1;
/* Non-zero means don't display cursor here. */
unsigned avoid_cursor_p : 1;
#define FACE_ID_BITS 20
/* Face of the glyph. This is a realized face ID,
an index in the face cache of the frame. */
unsigned face_id : FACE_ID_BITS;
/* Type of font used to display the character glyph. May be used to
determine which set of functions to use to obtain font metrics
for the glyph. On W32, value should be an enumerator of the type
w32_char_font_type. Otherwise it equals FONT_TYPE_UNKNOWN. */
unsigned font_type : 3;
struct glyph_slice slice;
/* A union of sub-structures for different glyph types. */
/* Character code for character glyphs (type == CHAR_GLYPH). */
unsigned ch;
/* Sub-structures for type == COMPOSITION_GLYPH. */
/* Flag to tell if the composition is automatic or not. */
unsigned automatic : 1;
/* ID of the composition. */
unsigned id : 23;
/* Start and end indices of glyphs of the composition. */
unsigned from : 4;
unsigned to : 4;
} cmp;
/* Image ID for image glyphs (type == IMAGE_GLYPH). */
unsigned img_id;
/* Sub-structure for type == STRETCH_GLYPH. */
/* The height of the glyph. */
unsigned height : 16;
/* The ascent of the glyph. */
unsigned ascent : 16;
/* Used to compare all bit-fields above in one step. */
unsigned val;
} u;
/* Default value of the glyph font_type field. */
/* Is GLYPH a space? */
/* Are glyph slices of glyphs *X and *Y equal */
((X)->slice.x == (Y)->slice.x \
&& (X)->slice.y == (Y)->slice.y \
&& (X)->slice.width == (Y)->slice.width \
&& (X)->slice.height == (Y)->slice.height)
/* Are glyphs *X and *Y displayed equal? */
#define GLYPH_EQUAL_P(X, Y) \
((X)->type == (Y)->type \
&& (X)->u.val == (Y)->u.val \
&& (X)->face_id == (Y)->face_id \
&& (X)->padding_p == (Y)->padding_p \
&& (X)->left_box_line_p == (Y)->left_box_line_p \
&& (X)->right_box_line_p == (Y)->right_box_line_p \
&& (X)->voffset == (Y)->voffset \
&& (X)->pixel_width == (Y)->pixel_width)
/* Are character codes, faces, padding_ps of glyphs *X and *Y equal? */
((X)-> == (Y)-> \
&& (X)->face_id == (Y)->face_id \
&& (X)->padding_p == (Y)->padding_p)
/* Fill a character glyph GLYPH. CODE, FACE_ID, PADDING_P correspond
to the bits defined for the typedef `GLYPH' in lisp.h. */
do \
{ \
(GLYPH) = (CODE); \
(GLYPH).face_id = (FACE_ID); \
(GLYPH).padding_p = (PADDING_P); \
} \
while (0)
/* Fill a character type glyph GLYPH from a glyph typedef FROM as
defined in lisp.h. */
/* Construct a glyph code from a character glyph GLYPH. If the
character is multibyte, return -1 as we can't use glyph table for a
multibyte character. */
do \
{ \
if ((GLYPH) < 256) \
SET_GLYPH ((G), (GLYPH), ((GLYPH).face_id)); \
else \
SET_GLYPH ((G), -1, 0); \
} \
while (0)
/* Is GLYPH a padding glyph? */
Glyph Pools
/* Glyph Pool.
Glyph memory for frame-based redisplay is allocated from the heap
in one vector kept in a glyph pool structure which is stored with
the frame. The size of the vector is made large enough to cover
all windows on the frame.
Both frame and window glyph matrices reference memory from a glyph
pool in frame-based redisplay.
In window-based redisplay, no glyphs pools exist; windows allocate
and free their glyph memory themselves. */
struct glyph_pool
/* Vector of glyphs allocated from the heap. */
struct glyph *glyphs;
/* Allocated size of `glyphs'. */
int nglyphs;
/* Number of rows and columns in a matrix. */
int nrows, ncolumns;
Glyph Matrix
/* Glyph Matrix.
Three kinds of glyph matrices exist:
1. Frame glyph matrices. These are used for terminal frames whose
redisplay needs a view of the whole screen due to limited terminal
capabilities. Frame matrices are used only in the update phase
of redisplay. They are built in update_frame and not used after
the update has been performed.
2. Window glyph matrices on frames having frame glyph matrices.
Such matrices are sub-matrices of their corresponding frame matrix,
i.e. frame glyph matrices and window glyph matrices share the same
glyph memory which is allocated in form of a glyph_pool structure.
Glyph rows in such a window matrix are slices of frame matrix rows.
2. Free-standing window glyph matrices managing their own glyph
storage. This form is used in window-based redisplay which
includes variable width and height fonts etc.
The size of a window's row vector depends on the height of fonts
defined on its frame. It is chosen so that the vector is large
enough to describe all lines in a window when it is displayed in
the smallest possible character size. When new fonts are loaded,
or window sizes change, the row vector is adjusted accordingly. */
struct glyph_matrix
/* The pool from which glyph memory is allocated, if any. This is
null for frame matrices and for window matrices managing their
own storage. */
struct glyph_pool *pool;
/* Vector of glyph row structures. The row at nrows - 1 is reserved
for the mode line. */
struct glyph_row *rows;
/* Number of elements allocated for the vector rows above. */
int rows_allocated;
/* The number of rows used by the window if all lines were displayed
with the smallest possible character height. */
int nrows;
/* Origin within the frame matrix if this is a window matrix on a
frame having a frame matrix. Both values are zero for
window-based redisplay. */
int matrix_x, matrix_y;
/* Width and height of the matrix in columns and rows. */
int matrix_w, matrix_h;
/* If this structure describes a window matrix of window W,
window_left_col is the value of W->left_col, window_top_line the
value of W->top_line, window_height and window_width are width and
height of W, as returned by window_box, and window_vscroll is the
value of W->vscroll at the time the matrix was last adjusted.
Only set for window-based redisplay. */
int window_left_col, window_top_line;
int window_height, window_width;
int window_vscroll;
/* Number of glyphs reserved for left and right marginal areas when
the matrix was last adjusted. */
int left_margin_glyphs, right_margin_glyphs;
/* Flag indicating that scrolling should not be tried in
update_window. This flag is set by functions like try_window_id
which do their own scrolling. */
unsigned no_scrolling_p : 1;
/* Non-zero means window displayed in this matrix has a top mode
line. */
unsigned header_line_p : 1;
/* A string identifying the method used to display the matrix. */
char method[512];
/* The buffer this matrix displays. Set in
mark_window_display_accurate_1. */
struct buffer *buffer;
/* Values of BEGV and ZV as of last redisplay. Set in
mark_window_display_accurate_1. */
int begv, zv;
/* Check that glyph pointers stored in glyph rows of MATRIX are okay.
This aborts if any pointer is found twice. */
void check_matrix_pointer_lossage P_ ((struct glyph_matrix *));
#define CHECK_MATRIX(MATRIX) check_matrix_pointer_lossage ((MATRIX))
#define CHECK_MATRIX(MATRIX) (void) 0
Glyph Rows
/* Area in window glyph matrix. If values are added or removed, the
function mark_object in alloc.c has to be changed. */
enum glyph_row_area
/* Rows of glyphs in a windows or frame glyph matrix.
Each row is partitioned into three areas. The start and end of
each area is recorded in a pointer as shown below.
| left margin area | text area | right margin area |
| | | |
| |
glyphs[TEXT_AREA] |
Rows in frame matrices reference glyph memory allocated in a frame
glyph pool (see the description of struct glyph_pool). Rows in
window matrices on frames having frame matrices reference slices of
the glyphs of corresponding rows in the frame matrix.
Rows in window matrices on frames having no frame matrices point to
glyphs allocated from the heap via xmalloc;
glyphs[LEFT_MARGIN_AREA] is the start address of the allocated
glyph structure array. */
struct glyph_row
/* Pointers to beginnings of areas. The end of an area A is found at
A + 1 in the vector. The last element of the vector is the end
of the whole row.
Kludge alert: Even if used[TEXT_AREA] == 0, glyphs[TEXT_AREA][0]'s
position field is used. It is -1 if this row does not correspond
to any text; it is some buffer position if the row corresponds to
an empty display line that displays a line end. This is what old
redisplay used to do. (Except in code for terminal frames, this
kludge is no longer used, I believe. --gerd).
See also start, end, displays_text_p and ends_at_zv_p for cleaner
ways to do it. The special meaning of positions 0 and -1 will be
removed some day, so don't use it in new code. */
struct glyph *glyphs[1 + LAST_AREA];
/* Number of glyphs actually filled in areas. */
short used[LAST_AREA];
/* Window-relative x and y-position of the top-left corner of this
row. If y < 0, this means that eabs (y) pixels of the row are
invisible because it is partially visible at the top of a window.
If x < 0, this means that eabs (x) pixels of the first glyph of
the text area of the row are invisible because the glyph is
partially visible. */
int x, y;
/* Width of the row in pixels without taking face extension at the
end of the row into account, and without counting truncation
and continuation glyphs at the end of a row on ttys. */
int pixel_width;
/* Logical ascent/height of this line. The value of ascent is zero
and height is 1 on terminal frames. */
int ascent, height;
/* Physical ascent/height of this line. If max_ascent > ascent,
this line overlaps the line above it on the display. Otherwise,
if max_height > height, this line overlaps the line beneath it. */
int phys_ascent, phys_height;
/* Portion of row that is visible. Partially visible rows may be
found at the top and bottom of a window. This is 1 for tty
frames. It may be < 0 in case of completely invisible rows. */
int visible_height;
/* Extra line spacing added after this row. Do not consider this
in last row when checking if row is fully visible. */
int extra_line_spacing;
/* Hash code. This hash code is available as soon as the row
is constructed, i.e. after a call to display_line. */
unsigned hash;
/* First position in this row. This is the text position, including
overlay position information etc, where the display of this row
started, and can thus be less the position of the first glyph
(e.g. due to invisible text or horizontal scrolling). */
struct display_pos start;
/* Text position at the end of this row. This is the position after
the last glyph on this row. It can be greater than the last
glyph position + 1, due to truncation, invisible text etc. In an
up-to-date display, this should always be equal to the start
position of the next row. */
struct display_pos end;
/* Non-zero means the overlay arrow bitmap is on this line.
-1 means use default overlay arrow bitmap, else
it specifies actual fringe bitmap number. */
int overlay_arrow_bitmap;
/* Left fringe bitmap number (enum fringe_bitmap_type). */
unsigned left_user_fringe_bitmap : FRINGE_ID_BITS;
/* Right fringe bitmap number (enum fringe_bitmap_type). */
unsigned right_user_fringe_bitmap : FRINGE_ID_BITS;
/* Left fringe bitmap number (enum fringe_bitmap_type). */
unsigned left_fringe_bitmap : FRINGE_ID_BITS;
/* Right fringe bitmap number (enum fringe_bitmap_type). */
unsigned right_fringe_bitmap : FRINGE_ID_BITS;
/* Face of the left fringe glyph. */
unsigned left_user_fringe_face_id : FACE_ID_BITS;
/* Face of the right fringe glyph. */
unsigned right_user_fringe_face_id : FACE_ID_BITS;
/* Face of the left fringe glyph. */
unsigned left_fringe_face_id : FACE_ID_BITS;
/* Face of the right fringe glyph. */
unsigned right_fringe_face_id : FACE_ID_BITS;
/* Vertical offset of the left fringe bitmap. */
signed left_fringe_offset : FRINGE_HEIGHT_BITS;
/* Vertical offset of the right fringe bitmap. */
signed right_fringe_offset : FRINGE_HEIGHT_BITS;
/* 1 means that at least one of the left and right fringe bitmaps is
periodic and thus depends on the y-position of the row. */
unsigned fringe_bitmap_periodic_p : 1;
/* 1 means that we must draw the bitmaps of this row. */
unsigned redraw_fringe_bitmaps_p : 1;
/* In a desired matrix, 1 means that this row must be updated. In a
current matrix, 0 means that the row has been invalidated, i.e.
the row's contents do not agree with what is visible on the
screen. */
unsigned enabled_p : 1;
/* 1 means row displays a text line that is truncated on the left or
right side. */
unsigned truncated_on_left_p : 1;
unsigned truncated_on_right_p : 1;
/* 1 means that this row displays a continued line, i.e. it has a
continuation mark at the right side. */
unsigned continued_p : 1;
/* 0 means that this row does not contain any text, i.e. it is
a blank line at the window and buffer end. */
unsigned displays_text_p : 1;
/* 1 means that this line ends at ZV. */
unsigned ends_at_zv_p : 1;
/* 1 means the face of the last glyph in the text area is drawn to
the right end of the window. This flag is used in
update_text_area to optimize clearing to the end of the area. */
unsigned fill_line_p : 1;
/* Non-zero means display a bitmap on X frames indicating that this
line contains no text and ends in ZV. */
unsigned indicate_empty_line_p : 1;
/* 1 means this row contains glyphs that overlap each other because
of lbearing or rbearing. */
unsigned contains_overlapping_glyphs_p : 1;
/* 1 means this row is as wide as the window it is displayed in, including
scroll bars, fringes, and internal borders. This also
implies that the row doesn't have marginal areas. */
unsigned full_width_p : 1;
/* Non-zero means row is a mode or header-line. */
unsigned mode_line_p : 1;
/* 1 in a current row means this row is overlapped by another row. */
unsigned overlapped_p : 1;
/* 1 means this line ends in the middle of a character consisting
of more than one glyph. Some glyphs have been put in this row,
the rest are put in rows below this one. */
unsigned ends_in_middle_of_char_p : 1;
/* 1 means this line starts in the middle of a character consisting
of more than one glyph. Some glyphs have been put in the
previous row, the rest are put in this row. */
unsigned starts_in_middle_of_char_p : 1;
/* 1 in a current row means this row overlaps others. */
unsigned overlapping_p : 1;
/* 1 means some glyphs in this row are displayed in mouse-face. */
unsigned mouse_face_p : 1;
/* 1 means this row was ended by a newline from a string. */
unsigned ends_in_newline_from_string_p : 1;
/* 1 means this row width is exactly the width of the window, and the
final newline character is hidden in the right fringe. */
unsigned exact_window_width_line_p : 1;
/* 1 means this row currently shows the cursor in the right fringe. */
unsigned cursor_in_fringe_p : 1;
/* 1 means the last glyph in the row is part of an ellipsis. */
unsigned ends_in_ellipsis_p : 1;
/* Non-zero means display a bitmap on X frames indicating that this
the first line of the buffer. */
unsigned indicate_bob_p : 1;
/* Non-zero means display a bitmap on X frames indicating that this
the top line of the window, but not start of the buffer. */
unsigned indicate_top_line_p : 1;
/* Non-zero means display a bitmap on X frames indicating that this
the last line of the buffer. */
unsigned indicate_eob_p : 1;
/* Non-zero means display a bitmap on X frames indicating that this
the bottom line of the window, but not end of the buffer. */
unsigned indicate_bottom_line_p : 1;
/* Continuation lines width at the start of the row. */
int continuation_lines_width;
/* Non-NULL means the current clipping area. This is temporarily
set while exposing a region. Coordinates are frame-relative. */
XRectangle *clip;
/* Get a pointer to row number ROW in matrix MATRIX. If GLYPH_DEBUG
is defined to a non-zero value, the function matrix_row checks that
we don't try to access rows that are out of bounds. */
struct glyph_row *matrix_row P_ ((struct glyph_matrix *, int));
#define MATRIX_ROW(MATRIX, ROW) matrix_row ((MATRIX), (ROW))
#define MATRIX_ROW(MATRIX, ROW) ((MATRIX)->rows + (ROW))
/* Return a pointer to the row reserved for the mode line in MATRIX.
Row MATRIX->nrows - 1 is always reserved for the mode line. */
((MATRIX)->rows + (MATRIX)->nrows - 1)
/* Return a pointer to the row reserved for the header line in MATRIX.
This is always the first row in MATRIX because that's the only
way that works in frame-based redisplay. */
/* Return a pointer to first row in MATRIX used for text display. */
((MATRIX)->rows->mode_line_p ? (MATRIX)->rows + 1 : (MATRIX)->rows)
/* Return a pointer to the first glyph in the text area of a row.
MATRIX is the glyph matrix accessed, and ROW is the row index in
/* Return the number of used glyphs in the text area of a row. */
/* Return the character/ byte position at which the display of ROW
starts. */
#define MATRIX_ROW_START_CHARPOS(ROW) ((ROW)->start.pos.charpos)
#define MATRIX_ROW_START_BYTEPOS(ROW) ((ROW)->start.pos.bytepos)
/* Return the character/ byte position at which ROW ends. */
#define MATRIX_ROW_END_CHARPOS(ROW) ((ROW)->end.pos.charpos)
#define MATRIX_ROW_END_BYTEPOS(ROW) ((ROW)->end.pos.bytepos)
/* Return the vertical position of ROW in MATRIX. */
/* Return the last glyph row + 1 in MATRIX on window W reserved for
text. If W has a mode line, the last row in the matrix is reserved
for it. */
((MATRIX)->rows \
+ (MATRIX)->nrows \
- (WINDOW_WANTS_MODELINE_P ((W)) ? 1 : 0))
/* Non-zero if the face of the last glyph in ROW's text area has
to be drawn to the end of the text area. */
#define MATRIX_ROW_EXTENDS_FACE_P(ROW) ((ROW)->fill_line_p)
/* Set and query the enabled_p flag of glyph row ROW in MATRIX. */
(MATRIX_ROW ((MATRIX), (ROW))->enabled_p = (VALUE) != 0)
(MATRIX_ROW ((MATRIX), (ROW))->enabled_p)
/* Non-zero if ROW displays text. Value is non-zero if the row is
blank but displays a line end. */
#define MATRIX_ROW_DISPLAYS_TEXT_P(ROW) ((ROW)->displays_text_p)
/* Helper macros */
((ROW)->height != (ROW)->visible_height)
(((ROW)->y + (ROW)->height - (ROW)->extra_line_spacing) \
/* Non-zero if ROW is not completely visible in window W. */
/* Non-zero if ROW is partially visible at the top of window W. */
/* Non-zero if ROW is partially visible at the bottom of window W. */
/* Return the bottom Y + 1 of ROW. */
#define MATRIX_ROW_BOTTOM_Y(ROW) ((ROW)->y + (ROW)->height)
/* Is ROW the last visible one in the display described by the
iterator structure pointed to by IT?. */
(MATRIX_ROW_BOTTOM_Y ((ROW)) >= (IT)->last_visible_y)
/* Non-zero if ROW displays a continuation line. */
((ROW)->continuation_lines_width > 0)
/* Non-zero if ROW ends in the middle of a character. This is the
case for continued lines showing only part of a display table entry
or a control char, or an overlay string. */
((ROW)->end.dpvec_index > 0 \
|| (ROW)->end.overlay_string_index >= 0 \
|| (ROW)->ends_in_middle_of_char_p)
/* Non-zero if ROW ends in the middle of an overlay string. */
((ROW)->end.overlay_string_index >= 0)
/* Non-zero if ROW starts in the middle of a character. See above. */
((ROW)->start.dpvec_index > 0 \
|| (ROW)->starts_in_middle_of_char_p \
|| ((ROW)->start.overlay_string_index >= 0 \
&& (ROW)->start.string_pos.charpos > 0))
/* Non-zero means ROW overlaps its predecessor. */
((ROW)->phys_ascent > (ROW)->ascent)
/* Non-zero means ROW overlaps its successor. */
((ROW)->phys_height - (ROW)->phys_ascent \
> (ROW)->height - (ROW)->ascent)
/* Non-zero means that fonts have been loaded since the last glyph
matrix adjustments. The function redisplay_internal adjusts glyph
matrices when this flag is non-zero. */
extern int fonts_changed_p;
/* A glyph for a space. */
extern struct glyph space_glyph;
/* Window being updated by update_window. This is non-null as long as
update_window has not finished, and null otherwise. */
extern struct window *updated_window;
/* Glyph row and area updated by update_window_line. */
extern struct glyph_row *updated_row;
extern int updated_area;
/* Non-zero means reading single-character input with prompt so put
cursor on mini-buffer after the prompt. Positive means at end of
text in echo area; negative means at beginning of line. */
extern int cursor_in_echo_area;
/* Non-zero means last display completed. Zero means it was
preempted. */
extern int display_completed;
/* Non-zero means redisplay has been performed directly (see also
direct_output_for_insert and direct_output_forward_char), so that
no further updating has to be performed. The function
redisplay_internal checks this flag, and does nothing but reset it
to zero if it is non-zero. */
extern int redisplay_performed_directly_p;
/* A temporary storage area, including a row of glyphs. Initialized
in xdisp.c. Used for various purposes, as an example see
direct_output_for_insert. */
extern struct glyph_row scratch_glyph_row;
Glyph Strings
/* Enumeration for overriding/changing the face to use for drawing
glyphs in draw_glyphs. */
enum draw_glyphs_face
/* A sequence of glyphs to be drawn in the same face. */
struct glyph_string
/* X-origin of the string. */
int x;
/* Y-origin and y-position of the base line of this string. */
int y, ybase;
/* The width of the string, not including a face extension. */
int width;
/* The width of the string, including a face extension. */
int background_width;
/* The height of this string. This is the height of the line this
string is drawn in, and can be different from the height of the
font the string is drawn in. */
int height;
/* Number of pixels this string overwrites in front of its x-origin.
This number is zero if the string has an lbearing >= 0; it is
-lbearing, if the string has an lbearing < 0. */
int left_overhang;
/* Number of pixels this string overwrites past its right-most
nominal x-position, i.e. x + width. Zero if the string's
rbearing is <= its nominal width, rbearing - width otherwise. */
int right_overhang;
/* The frame on which the glyph string is drawn. */
struct frame *f;
/* The window on which the glyph string is drawn. */
struct window *w;
/* X display and window for convenience. */
Display *display;
Window window;
/* The glyph row for which this string was built. It determines the
y-origin and height of the string. */
struct glyph_row *row;
/* The area within row. */
enum glyph_row_area area;
/* Characters to be drawn, and number of characters. */
XChar2b *char2b;
int nchars;
/* A face-override for drawing cursors, mouse face and similar. */
enum draw_glyphs_face hl;
/* Face in which this string is to be drawn. */
struct face *face;
/* Font in which this string is to be drawn. */
struct font *font;
/* Non-null means this string describes (part of) a static
composition. */
struct composition *cmp;
/* If not negative, this string describes a compos. */
int cmp_id;
/* Start and end glyph indices in a glyph-string. */
int cmp_from, cmp_to;
/* 1 means this glyph strings face has to be drawn to the right end
of the window's drawing area. */
unsigned extends_to_end_of_line_p : 1;
/* 1 means the background of this string has been drawn. */
unsigned background_filled_p : 1;
/* 1 means glyph string must be drawn with 16-bit functions. */
unsigned two_byte_p : 1;
/* 1 means that the original font determined for drawing this glyph
string could not be loaded. The member `font' has been set to
the frame's default font in this case. */
unsigned font_not_found_p : 1;
/* 1 means that the face in which this glyph string is drawn has a
stipple pattern. */
unsigned stippled_p : 1;
#define OVERLAPS_PRED (1 << 0)
#define OVERLAPS_SUCC (1 << 1)
/* Non-zero means only the foreground of this glyph string must be
drawn, and we should use the physical height of the line this
glyph string appears in as clip rect. If the value is
OVERLAPS_ERASED_CURSOR, the clip rect is restricted to the rect
of the erased cursor. OVERLAPS_PRED and OVERLAPS_SUCC mean we
draw overlaps with the preceding and the succeeding rows,
respectively. */
unsigned for_overlaps : 3;
/* 1 means that all glyphs in this glyph string has the flag
padding_p set, and thus must be drawn one by one to have 1-pixel
width even though the logical width in the font is zero. */
unsigned padding_p : 1;
/* The GC to use for drawing this glyph string. */
#if defined(HAVE_X_WINDOWS)
GC gc;
#if defined(HAVE_NTGUI)
XGCValues *gc;
HDC hdc;
/* A pointer to the first glyph in the string. This glyph
corresponds to char2b[0]. Needed to draw rectangles if
font_not_found_p is 1. */
struct glyph *first_glyph;
/* Image, if any. */
struct image *img;
/* Slice */
struct glyph_slice slice;
/* Non-null means the horizontal clipping region starts from the
left edge of *clip_head, and ends with the right edge of
*clip_tail, not including their overhangs. */
struct glyph_string *clip_head, *clip_tail;
/* The current clipping areas. */
NativeRectangle clip[2];
/* Number of clipping areas. */
int num_clips;
int underline_position;
int underline_thickness;
struct glyph_string *next, *prev;
Display Dimensions
/* Return the height of the mode line in glyph matrix MATRIX, or zero
if not known. This macro is called under circumstances where
MATRIX might not have been allocated yet. */
((MATRIX) && (MATRIX)->rows \
: 0)
/* Return the height of the header line in glyph matrix MATRIX, or zero
if not known. This macro is called under circumstances where
MATRIX might not have been allocated yet. */
((MATRIX) && (MATRIX)->rows \
: 0)
/* Return the desired face id for the mode line of a window, depending
on whether the window is selected or not, or if the window is the
scrolling window for the currently active minibuffer window.
Due to the way display_mode_lines manipulates with the contents of
selected_window, this macro needs three arguments: SELW which is
compared against the current value of selected_window, MBW which is
compared against minibuf_window (if SELW doesn't match), and SCRW
which is compared against minibuf_selected_window (if MBW matches). */
((!mode_line_in_non_selected_windows \
|| (SELW) == XWINDOW (selected_window) \
|| (minibuf_level > 0 \
&& !NILP (minibuf_selected_window) \
&& (MBW) == XWINDOW (minibuf_window) \
&& (SCRW) == XWINDOW (minibuf_selected_window))) \
/* Return the desired face id for the mode line of window W. */
(CURRENT_MODE_LINE_FACE_ID_3((W), XWINDOW (selected_window), (W)))
/* Return the current height of the mode line of window W. If not
known from current_mode_line_height, look at W's current glyph
matrix, or return a default based on the height of the font of the
face `mode-line'. */
(current_mode_line_height >= 0 \
? current_mode_line_height \
: (MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
? MATRIX_MODE_LINE_HEIGHT ((W)->current_matrix) \
: estimate_mode_line_height (XFRAME ((W)->frame), \
/* Return the current height of the header line of window W. If not
known from current_header_line_height, look at W's current glyph
matrix, or return an estimation based on the height of the font of
the face `header-line'. */
(current_header_line_height >= 0 \
? current_header_line_height \
: (MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
? MATRIX_HEADER_LINE_HEIGHT ((W)->current_matrix) \
: estimate_mode_line_height (XFRAME ((W)->frame), \
/* Return the height of the desired mode line of window W. */
MATRIX_MODE_LINE_HEIGHT ((W)->desired_matrix)
/* Return the height of the desired header line of window W. */
MATRIX_HEADER_LINE_HEIGHT ((W)->desired_matrix)
/* Value is non-zero if window W wants a mode line. */
&& !(W)->pseudo_window_p \
&& BUFFERP ((W)->buffer) \
&& !NILP (XBUFFER ((W)->buffer)->mode_line_format) \
extern Lisp_Object Qwindow_wants_header_line_function,
/* Value is non-zero if window W wants a header line. */
&& !(W)->pseudo_window_p \
&& BUFFERP ((W)->buffer) \
&& !NILP (XBUFFER ((W)->buffer)->header_line_format) \
&& WINDOW_TOTAL_LINES (W) > 1 + !NILP (XBUFFER ((W)->buffer)->mode_line_format) \
&& !window_header_line_inhibited_p (W))
/* Return proper value to be used as baseline offset of font that has
ASCENT and DESCENT to draw characters by the font at the vertical
center of the line of frame F.
Here, our task is to find the value of BOFF in the following figure;
-+-+---------+-+ | |
| | | | | |
| | | ASCENT | |
HEIGHT | | | | |
| | |-|-+------+-----------|------- baseline
| | | | BOFF | |
| |---------|-+-+ | |
| | | DESCENT | |
-+-+---------+-+ F_DESCENT |
DESCENT = FONT->descent
F_DESCENT = (FRAME_FONT (F)->descent
- F->terminal->output_data.x->baseline_offset)
/* Indices of face attributes in Lisp face vectors. Slot zero is the
symbol `face'. */
enum lface_attribute_index
/* Box types of faces. */
enum face_box_type
/* No box around text. */
/* Simple box of specified width and color. Default width is 1, and
default color is the foreground color of the face. */
/* Boxes with 3D shadows. Color equals the background color of the
face. Width is specified. */
/* Structure describing a realized face.
For each Lisp face, 0..N realized faces can exist for different
frames and different charsets. Realized faces are built from Lisp
faces and text properties/overlays by merging faces and adding
unspecified attributes from the `default' face. */
struct face
/* The id of this face. The id equals the index of this face in the
vector faces_by_id of its face cache. */
int id;
/* If non-zero, this is a GC that we can use without modification for
drawing the characters in this face. */
GC gc;
/* Background stipple or bitmap used for this face. This is
an id as returned from load_pixmap. */
int stipple;
#else /* not HAVE_WINDOW_SYSTEM */
/* Dummy. */
int stipple;
#endif /* not HAVE_WINDOW_SYSTEM */
/* Pixel value of foreground color for X frames. Color index
for tty frames. */
unsigned long foreground;
/* Pixel value or color index of background color. */
unsigned long background;
/* Pixel value or color index of underline color. */
unsigned long underline_color;
/* Pixel value or color index of overlined, strike-through, or box
color. */
unsigned long overline_color;
unsigned long strike_through_color;
unsigned long box_color;
struct font *font;
/* Fontset ID if for this face's fontset. Non-ASCII faces derived
from the same ASCII face have the same fontset. */
int fontset;
/* Pixmap width and height. */
unsigned int pixmap_w, pixmap_h;
/* Non-zero means characters in this face have a box that thickness
around them. If it is negative, the absolute value indicates the
thickness, and the horizontal lines of box (top and bottom) are
drawn inside of characters glyph area. The vertical lines of box
(left and right) are drawn as the same way as the case that this
value is positive. */
int box_line_width;
/* Type of box drawn. A value of FACE_NO_BOX means no box is drawn
around text in this face. A value of FACE_SIMPLE_BOX means a box
of width box_line_width is drawn in color box_color. A value of
FACE_RAISED_BOX or FACE_SUNKEN_BOX means a 3D box is drawn with
shadow colors derived from the background color of the face. */
enum face_box_type box;
/* If `box' above specifies a 3D type, 1 means use box_color for
drawing shadows. */
unsigned use_box_color_for_shadows_p : 1;
/* Non-zero if text in this face should be underlined, overlined,
strike-through or have a box drawn around it. */
unsigned underline_p : 1;
unsigned overline_p : 1;
unsigned strike_through_p : 1;
/* 1 means that the colors specified for this face could not be
loaded, and were replaced by default colors, so they shouldn't be
freed. */
unsigned foreground_defaulted_p : 1;
unsigned background_defaulted_p : 1;
/* 1 means that either no color is specified for underlining or that
the specified color couldn't be loaded. Use the foreground
color when drawing in that case. */
unsigned underline_defaulted_p : 1;
/* 1 means that either no color is specified for the corresponding
attribute or that the specified color couldn't be loaded.
Use the foreground color when drawing in that case. */
unsigned overline_color_defaulted_p : 1;
unsigned strike_through_color_defaulted_p : 1;
unsigned box_color_defaulted_p : 1;
/* TTY appearances. Blinking is not yet implemented. Colors are
found in `lface' with empty color string meaning the default
color of the TTY. */
unsigned tty_bold_p : 1;
unsigned tty_dim_p : 1;
unsigned tty_underline_p : 1;
unsigned tty_alt_charset_p : 1;
unsigned tty_reverse_p : 1;
unsigned tty_blinking_p : 1;
/* 1 means that colors of this face may not be freed because they
have been copied bitwise from a base face (see
realize_x_face). */
unsigned colors_copied_bitwise_p : 1;
/* If non-zero, use overstrike (to simulate bold-face). */
unsigned overstrike : 1;
/* NOTE: this is not used yet, but eventually this impl should be done
similarly to overstrike */
#ifdef HAVE_NS
/* If non-zero, use geometric rotation (to simulate italic). */
unsigned synth_ital : 1;
/* The Lisp face attributes this face realizes. All attributes
in this vector are non-nil. */
Lisp_Object lface[LFACE_VECTOR_SIZE];
/* The hash value of this face. */
unsigned hash;
/* Next and previous face in hash collision list of face cache. */
struct face *next, *prev;
/* If this face is an ASCII face, this points to this face itself.
Otherwise, this points to an ASCII face that has the same
attributes except the font. */
struct face *ascii_face;
/* Extra member that a font-driver uses privately. */
void *extra;
/* Color index indicating that face uses a terminal's default color. */
#define FACE_TTY_DEFAULT_COLOR ((unsigned long) -1)
/* Color index indicating that face uses an unknown foreground color. */
#define FACE_TTY_DEFAULT_FG_COLOR ((unsigned long) -2)
/* Color index indicating that face uses an unknown background color. */
#define FACE_TTY_DEFAULT_BG_COLOR ((unsigned long) -3)
/* Non-zero if FACE was realized for unibyte use. */
#define FACE_UNIBYTE_P(FACE) ((FACE)->charset < 0)
/* IDs of important faces known by the C face code. These are the IDs
of the faces for CHARSET_ASCII. */
enum face_id
#define MAX_FACE_ID ((1 << FACE_ID_BITS) - 1)
/* A cache of realized faces. Each frame has its own cache because
Emacs allows different frame-local face definitions. */
struct face_cache
/* Hash table of cached realized faces. */
struct face **buckets;
/* Back-pointer to the frame this cache belongs to. */
struct frame *f;
/* A vector of faces so that faces can be referenced by an ID. */
struct face **faces_by_id;
/* The allocated size, and number of used slots of faces_by_id. */
int size, used;
/* Flag indicating that attributes of the `menu' face have been
changed. */
unsigned menu_face_changed_p : 1;
/* Prepare face FACE for use on frame F. This must be called before
using X resources of FACE. */
if ((FACE)->gc == 0) \
prepare_face_for_display ((F), (FACE)); \
else \
(void) 0
/* Return a pointer to the face with ID on frame F, or null if such a
face doesn't exist. */
#define FACE_FROM_ID(F, ID) \
(((unsigned) (ID) < FRAME_FACE_CACHE (F)->used) \
? FRAME_FACE_CACHE (F)->faces_by_id[ID] \
/* Non-zero if FACE is suitable for displaying character CHAR. */
? (FACE) == (FACE)->ascii_face \
: face_suitable_for_char_p ((FACE), (CHAR)))
/* Return the id of the realized face on frame F that is like the face
with id ID but is suitable for displaying character CHAR.
This macro is only meaningful for multibyte character CHAR. */
? (FACE)->ascii_face->id \
: face_for_char ((F), (FACE), (CHAR), (POS), (OBJECT)))
#else /* not HAVE_WINDOW_SYSTEM */
#endif /* not HAVE_WINDOW_SYSTEM */
/* Non-zero means face attributes have been changed since the last
redisplay. Used in redisplay_internal. */
extern int face_change_count;
/* Structure used to describe where and how to draw a fringe bitmap.
WHICH is the fringe bitmap to draw. WD and H is the (adjusted)
width and height of the bitmap, DH is the height adjustment (if
bitmap is periodic). X and Y are frame coordinates of the area to
display the bitmap, DY is relative offset of the bitmap into that
area. BX, NX, BY, NY specifies the area to clear if the bitmap
does not fill the entire area. FACE is the fringe face. */
struct draw_fringe_bitmap_params
int which; /* enum fringe_bitmap_type */
unsigned short *bits;
int wd, h, dh;
int x, y;
int bx, nx, by, ny;
unsigned cursor_p : 1;
unsigned overlay_p : 1;
struct face *face;
Display Iterator
/* Iteration over things to display in current_buffer or in a string.
The iterator handles:
1. Overlay strings (after-string, before-string).
2. Face properties.
3. Invisible text properties.
4. Selective display.
5. Translation of characters via display tables.
6. Translation of control characters to the forms `\003' or `^C'.
7. `glyph' and `space-width' properties.
Iterators are initialized by calling init_iterator or one of the
equivalent functions below. A call to get_next_display_element
loads the iterator structure with information about what next to
display. A call to set_iterator_to_next increments the iterator's
Characters from overlay strings, display table entries or control
character translations are returned one at a time. For example, if
we have a text of `a\x01' where `a' has a display table definition
of `cd' and the control character is displayed with a leading
arrow, then the iterator will return:
Call Return Source Call next
next c display table move
next d display table move
next ^ control char move
next A control char move
The same mechanism is also used to return characters for ellipses
displayed at the end of invisible text.
CAVEAT: Under some circumstances, move_.* functions can be called
asynchronously, e.g. when computing a buffer position from an x and
y pixel position. This means that these functions and functions
called from them SHOULD NOT USE xmalloc and alike. See also the
comment at the start of xdisp.c. */
/* Enumeration describing what kind of display element an iterator is
loaded with after a call to get_next_display_element. */
enum display_element_type
/* A normal character. */
/* A composition (static and automatic). */
/* An image. */
/* A flexible width and height space. */
/* End of buffer or string. */
/* Truncation glyphs. Never returned by get_next_display_element.
Used to get display information about truncation glyphs via
produce_glyphs. */
/* Continuation glyphs. See the comment for IT_TRUNCATION. */
/* An enumerator for each text property that has a meaning for display
purposes. */
enum prop_idx
/* Not a property. Used to indicate changes in overlays. */
/* Sentinel. */
/* An enumerator for the method of wrapping long lines. */
enum line_wrap_method
struct it_slice
Lisp_Object x;
Lisp_Object y;
Lisp_Object width;
Lisp_Object height;
/* Input sources for fetching characters or data to display.
The input source is found in the `method' field. */
enum it_method {
#define IT_STACK_SIZE 4
/* Iterator for composition (both for static and automatic). */
struct composition_it
/* Next position at which to check the composition. */
EMACS_INT stop_pos;
/* ID number of the composition or glyph-string. If negative, we
are not iterating over a composition now. */
int id;
/* If non-negative, character that triggers the automatic
composition at `stop_pos', and this is an automatic composition.
If negative, this is a static composition. This is set to -2
temporarily if searching of composition reach a limit or a
newline. */
int ch;
/* If this an automatic composition, how many characters to look back
from the position where a character triggering the composition
exists. */
int lookback;
/* If non-negative, number of glyphs of the glyph-string. */
int nglyphs;
/* Number of characters and bytes of the current grapheme cluster. */
int nchars, nbytes;
/* Indices of the glyphs for the current grapheme cluster. */
int from, to;
/* Width of the current grapheme cluster in units of pixels on a
graphic display and in units of canonical characters on a
terminal display. */
int width;
struct it
/* The window in which we iterate over current_buffer (or a string). */
Lisp_Object window;
struct window *w;
/* The window's frame. */
struct frame *f;
/* Method to use to load this structure with the next display element. */
enum it_method method;
/* The next position at which to check for face changes, invisible
text, overlay strings, end of text etc., which see. */
EMACS_INT stop_charpos;
/* Maximum string or buffer position + 1. ZV when iterating over
current_buffer. */
EMACS_INT end_charpos;
/* C string to iterate over. Non-null means get characters from
this string, otherwise characters are read from current_buffer
or it->string. */
unsigned char *s;
/* Number of characters in the string (s, or it->string) we iterate
over. */
int string_nchars;
/* Start and end of a visible region; -1 if the region is not
visible in the window. */
EMACS_INT region_beg_charpos, region_end_charpos;
/* Position at which redisplay end trigger functions should be run. */
EMACS_INT redisplay_end_trigger_charpos;
/* 1 means multibyte characters are enabled. */
unsigned multibyte_p : 1;
/* 1 means window has a mode line at its top. */
unsigned header_line_p : 1;
/* 1 means `string' is the value of a `display' property.
Don't handle some `display' properties in these strings. */
unsigned string_from_display_prop_p : 1;
/* When METHOD == next_element_from_display_vector,
this is 1 if we're doing an ellipsis. Otherwise meaningless. */
unsigned ellipsis_p : 1;
/* True means cursor shouldn't be displayed here. */
unsigned avoid_cursor_p : 1;
/* Display table in effect or null for none. */
struct Lisp_Char_Table *dp;
/* Current display table vector to return characters from and its
end. dpvec null means we are not returning characters from a
display table entry; current.dpvec_index gives the current index
into dpvec. This same mechanism is also used to return
characters from translated control characters, i.e. `\003' or
`^C'. */
Lisp_Object *dpvec, *dpend;
/* Length in bytes of the char that filled dpvec. A value of zero
means that no such character is involved. */
int dpvec_char_len;
/* Face id to use for all characters in display vector. -1 if unused. */
int dpvec_face_id;
/* Face id of the iterator saved in case a glyph from dpvec contains
a face. The face is restored when all glyphs from dpvec have
been delivered. */
int saved_face_id;
/* Vector of glyphs for control character translation. The pointer
dpvec is set to ctl_chars when a control character is translated.
This vector is also used for incomplete multibyte character
translation (e.g \222\244). Such a character is at most 4 bytes,
thus we need at most 16 bytes here. */
Lisp_Object ctl_chars[16];
/* Initial buffer or string position of the iterator, before skipping
over display properties and invisible text. */
struct display_pos start;
/* Current buffer or string position of the iterator, including
position in overlay strings etc. */
struct display_pos current;
/* Total number of overlay strings to process. This can be >
int n_overlay_strings;
/* The charpos where n_overlay_strings was calculated. This should
be set at the same time as n_overlay_strings. It is needed
because we show before-strings at the start of invisible text;
see handle_invisible_prop in xdisp.c. */
int overlay_strings_charpos;
/* Vector of overlays to process. Overlay strings are processed
Lisp_Object overlay_strings[OVERLAY_STRING_CHUNK_SIZE];
/* For each overlay string, the overlay it came from. */
Lisp_Object string_overlays[OVERLAY_STRING_CHUNK_SIZE];
/* If non-nil, a Lisp string being processed. If
current.overlay_string_index >= 0, this is an overlay string from
pos. */
Lisp_Object string;
/* If non-nil, we are processing a string that came
from a `display' property given by an overlay. */
Lisp_Object from_overlay;
/* Stack of saved values. New entries are pushed when we begin to
process an overlay string or a string from a `glyph' property.
Entries are popped when we return to deliver display elements
from what we previously had. */
struct iterator_stack_entry
Lisp_Object string;
int string_nchars;
EMACS_INT end_charpos;
EMACS_INT stop_charpos;
struct composition_it cmp_it;
int face_id;
/* Save values specific to a given method. */
union {
/* method == GET_FROM_IMAGE */
struct {
Lisp_Object object;
struct it_slice slice;
int image_id;
} image;
/* method == GET_FROM_COMPOSITION */
struct {
Lisp_Object object;
} comp;
/* method == GET_FROM_STRETCH */
struct {
Lisp_Object object;
} stretch;
} u;
/* current text and display positions. */
struct text_pos position;
struct display_pos current;
Lisp_Object from_overlay;
enum glyph_row_area area;
enum it_method method;
unsigned multibyte_p : 1;
unsigned string_from_display_prop_p : 1;
unsigned display_ellipsis_p : 1;
unsigned avoid_cursor_p : 1;
enum line_wrap_method line_wrap;
/* properties from display property that are reset by another display property. */
short voffset;
Lisp_Object space_width;
Lisp_Object font_height;
/* Stack pointer. */
int sp;
/* -1 means selective display hides everything between a \r and the
next newline; > 0 means hide lines indented more than that value. */
int selective;
/* An enumeration describing what the next display element is
after a call to get_next_display_element. */
enum display_element_type what;
/* Face to use. */
int face_id;
/* Setting of buffer-local variable selective-display-ellipsis. */
unsigned selective_display_ellipsis_p : 1;
/* 1 means control characters are translated into the form `^C'
where the `^' can be replaced by a display table entry. */
unsigned ctl_arrow_p : 1;
/* Non-zero means that the current face has a box. */
unsigned face_box_p : 1;
/* Non-null means that the current character is the first in a run
of characters with box face. */
unsigned start_of_box_run_p : 1;
/* Non-zero means that the current character is the last in a run
of characters with box face. */
unsigned end_of_box_run_p : 1;
/* 1 means overlay strings at end_charpos have been processed. */
unsigned overlay_strings_at_end_processed_p : 1;
/* 1 means to ignore overlay strings at current pos, as they have
already been processed. */
unsigned ignore_overlay_strings_at_pos_p : 1;
/* 1 means the actual glyph is not available in the current
system. */
unsigned glyph_not_available_p : 1;
/* 1 means the next line in display_line continues a character
consisting of more than one glyph, and some glyphs of this
character have been put on the previous line. */
unsigned starts_in_middle_of_char_p : 1;
/* If 1, saved_face_id contains the id of the face in front of text
skipped due to selective display. */
unsigned face_before_selective_p : 1;
/* If 1, adjust current glyph so it does not increase current row
descent/ascent (line-height property). Reset after this glyph. */
unsigned constrain_row_ascent_descent_p : 1;
enum line_wrap_method line_wrap;
/* The ID of the default face to use. One of DEFAULT_FACE_ID,
MODE_LINE_FACE_ID, etc, depending on what we are displaying. */
int base_face_id;
/* If what == IT_CHARACTER, character and length in bytes. This is
a character from a buffer or string. It may be different from
the character displayed in case that
unibyte_display_via_language_environment is set.
If what == IT_COMPOSITION, the first component of a composition
and length in bytes of the composition. */
int c, len;
/* If what == IT_COMPOSITION, iterator substructure for the
composition. */
struct composition_it cmp_it;
/* The character to display, possibly translated to multibyte if
multibyte_p is zero or unibyte_display_via_language_environment
is set. This is set after get_next_display_element has been
called. If we are setting it->C directly before calling
PRODUCE_GLYPHS, this should be set beforehand too. */
int char_to_display;
/* If what == IT_IMAGE, the id of the image to display. */
int image_id;
/* Values from `slice' property. */
struct it_slice slice;
/* Value of the `space-width' property, if any; nil if none. */
Lisp_Object space_width;
/* Computed from the value of the `raise' property. */
short voffset;
/* Number of columns per \t. */
short tab_width;
/* Value of the `height' property, if any; nil if none. */
Lisp_Object font_height;
/* Object and position where the current display element came from.
Object can be a Lisp string in case the current display element
comes from an overlay string, or it is buffer. It may also be nil
during mode-line update. Position is a position in object. */
Lisp_Object object;
struct text_pos position;
/* Width in pixels of truncation and continuation glyphs. */
short truncation_pixel_width, continuation_pixel_width;
/* First and last visible x-position in the display area. If window
is hscrolled by n columns, first_visible_x == n * FRAME_COLUMN_WIDTH
(f), and last_visible_x == pixel width of W + first_visible_x. */
int first_visible_x, last_visible_x;
/* Last visible y-position + 1 in the display area without a mode
line, if the window has one. */
int last_visible_y;
/* Default amount of additional space in pixels between lines (for
window systems only.) */
int extra_line_spacing;
/* Max extra line spacing added in this row. */
int max_extra_line_spacing;
/* Override font height information for this glyph.
Used if override_ascent >= 0. Cleared after this glyph. */
int override_ascent, override_descent, override_boff;
/* If non-null, glyphs are produced in glyph_row with each call to
produce_glyphs. */
struct glyph_row *glyph_row;
/* The area of glyph_row to which glyphs are added. */
enum glyph_row_area area;
/* Number of glyphs needed for the last character requested via
produce_glyphs. This is 1 except for tabs. */
int nglyphs;
/* Width of the display element in pixels. Result of
produce_glyphs. */
int pixel_width;
/* Current, maximum logical, and maximum physical line height
information. Result of produce_glyphs. */
int ascent, descent, max_ascent, max_descent;
int phys_ascent, phys_descent, max_phys_ascent, max_phys_descent;
/* Current x pixel position within the display line. This value
does not include the width of continuation lines in front of the
line. The value of current_x is automatically incremented by
pixel_width with each call to produce_glyphs. */
int current_x;
/* Accumulated width of continuation lines. If > 0, this means we
are currently in a continuation line. This is initially zero and
incremented/reset by display_line, move_it_to etc. */
int continuation_lines_width;
/* Current y-position. Automatically incremented by the height of
glyph_row in move_it_to and display_line. */
int current_y;
/* Vertical matrix position of first text line in window. */
int first_vpos;
/* Current vertical matrix position, or line number. Automatically
incremented by move_it_to and display_line. */
int vpos;
/* Horizontal matrix position reached in move_it_in_display_line.
Only set there, not in display_line. */
int hpos;
/* Left fringe bitmap number (enum fringe_bitmap_type). */
unsigned left_user_fringe_bitmap : FRINGE_ID_BITS;
/* Right fringe bitmap number (enum fringe_bitmap_type). */
unsigned right_user_fringe_bitmap : FRINGE_ID_BITS;
/* Face of the left fringe glyph. */
unsigned left_user_fringe_face_id : FACE_ID_BITS;
/* Face of the right fringe glyph. */
unsigned right_user_fringe_face_id : FACE_ID_BITS;
/* Access to positions of iterator IT. */
#define IT_CHARPOS(IT) CHARPOS ((IT).current.pos)
#define IT_BYTEPOS(IT) BYTEPOS ((IT).current.pos)
#define IT_STRING_CHARPOS(IT) CHARPOS ((IT).current.string_pos)
#define IT_STRING_BYTEPOS(IT) BYTEPOS ((IT).current.string_pos)
/* Test if IT has reached the end of its buffer or string. This will
only work after get_next_display_element has been called. */
#define ITERATOR_AT_END_P(IT) ((IT)->what == IT_EOB)
/* Non-zero means IT is at the end of a line. This is the case if it
is either on a newline or on a carriage return and selective
display hides the rest of the line. */
((IT)->what == IT_CHARACTER \
&& ((IT)->c == '\n' \
|| ((IT)->c == '\r' && (IT)->selective)))
/* Call produce_glyphs or FRAME_RIF->produce_glyphs, if set. Shortcut
to avoid the function call overhead. */
do { \
extern int inhibit_free_realized_faces; \
if (FRAME_RIF ((IT)->f) != NULL) \
FRAME_RIF ((IT)->f)->produce_glyphs ((IT)); \
else \
produce_glyphs ((IT)); \
if ((IT)->glyph_row != NULL) \
inhibit_free_realized_faces = 1; \
} while (0)
/* Bit-flags indicating what operation move_it_to should perform. */
enum move_operation_enum
/* Stop if specified x-position is reached. */
MOVE_TO_X = 0x01,
/* Stop if specified y-position is reached. */
MOVE_TO_Y = 0x02,
/* Stop if specified vpos is reached. */
MOVE_TO_VPOS = 0x04,
/* Stop if specified buffer or string position is reached. */
MOVE_TO_POS = 0x08
Window-based redisplay interface
/* Structure used to describe runs of lines that must be scrolled. */
struct run
/* Source and destination y pixel position. */
int desired_y, current_y;
/* Source and destination vpos in matrix. */
int desired_vpos, current_vpos;
/* Height in pixels, number of glyph rows. */
int height, nrows;
/* Handlers for setting frame parameters. */
typedef void (*frame_parm_handler) P_ ((struct frame *, Lisp_Object, Lisp_Object));
/* Structure holding system-dependent interface functions needed
for window-based redisplay. */
struct redisplay_interface
/* Handlers for setting frame parameters. */
frame_parm_handler *frame_parm_handlers;
/* Produce glyphs/get display metrics for the display element IT is
loaded with. */
void (*produce_glyphs) P_ ((struct it *it));
/* Write or insert LEN glyphs from STRING at the nominal output
position. */
void (*write_glyphs) P_ ((struct glyph *string, int len));
void (*insert_glyphs) P_ ((struct glyph *start, int len));
/* Clear from nominal output position to X. X < 0 means clear
to right end of display. */
void (*clear_end_of_line) P_ ((int x));
/* Function to call to scroll the display as described by RUN on
window W. */
void (*scroll_run_hook) P_ ((struct window *w, struct run *run));
/* Function to call after a line in a display has been completely
updated. Used to draw truncation marks and alike. DESIRED_ROW
is the desired row which has been updated. */
void (*after_update_window_line_hook) P_ ((struct glyph_row *desired_row));
/* Function to call before beginning to update window W in
window-based redisplay. */
void (*update_window_begin_hook) P_ ((struct window *w));
/* Function to call after window W has been updated in window-based
redisplay. CURSOR_ON_P non-zero means switch cursor on.
MOUSE_FACE_OVERWRITTEN_P non-zero means that some lines in W
that contained glyphs in mouse-face were overwritten, so we
have to update the mouse highlight. */
void (*update_window_end_hook) P_ ((struct window *w, int cursor_on_p,
int mouse_face_overwritten_p));
/* Move cursor to row/column position VPOS/HPOS, pixel coordinates
Y/X. HPOS/VPOS are window-relative row and column numbers and X/Y
are window-relative pixel positions. */
void (*cursor_to) P_ ((int vpos, int hpos, int y, int x));
/* Flush the display of frame F. For X, this is XFlush. */
void (*flush_display) P_ ((struct frame *f));
/* Flush the display of frame F if non-NULL. This is called
during redisplay, and should be NULL on systems which flushes
automatically before reading input. */
void (*flush_display_optional) P_ ((struct frame *f));
/* Clear the mouse hightlight in window W, if there is any. */
void (*clear_window_mouse_face) P_ ((struct window *w));
/* Set *LEFT and *RIGHT to the left and right overhang of GLYPH on
frame F. */
void (*get_glyph_overhangs) P_ ((struct glyph *glyph, struct frame *f,
int *left, int *right));
/* Fix the display of AREA of ROW in window W for overlapping rows.
This function is called from redraw_overlapping_rows after
desired rows have been made current. */
void (*fix_overlapping_area) P_ ((struct window *w, struct glyph_row *row,
enum glyph_row_area area, int));
/* Draw a fringe bitmap in window W of row ROW using parameters P. */
void (*draw_fringe_bitmap) P_ ((struct window *w, struct glyph_row *row,
struct draw_fringe_bitmap_params *p));
/* Define and destroy fringe bitmap no. WHICH. */
void (*define_fringe_bitmap) P_ ((int which, unsigned short *bits,
int h, int wd));
void (*destroy_fringe_bitmap) P_ ((int which));
/* Compute left and right overhang of glyph string S.
A NULL pointer if platform does not support this. */
void (*compute_glyph_string_overhangs) P_ ((struct glyph_string *s));
/* Draw a glyph string S. */
void (*draw_glyph_string) P_ ((struct glyph_string *s));
/* Define cursor CURSOR on frame F. */
void (*define_frame_cursor) P_ ((struct frame *f, Cursor cursor));
/* Clear the area at (X,Y,WIDTH,HEIGHT) of frame F. */
void (*clear_frame_area) P_ ((struct frame *f, int x, int y,
int width, int height));
/* Draw specified cursor CURSOR_TYPE of width CURSOR_WIDTH
at row GLYPH_ROW on window W if ON_P is 1. If ON_P is
0, don't draw cursor. If ACTIVE_P is 1, system caret
should track this cursor (when applicable). */
void (*draw_window_cursor) P_ ((struct window *w,
struct glyph_row *glyph_row,
int x, int y,
int cursor_type, int cursor_width,
int on_p, int active_p));
/* Draw vertical border for window W from (X,Y0) to (X,Y1). */
void (*draw_vertical_window_border) P_ ((struct window *w,
int x, int y0, int y1));
/* Shift display of frame F to make room for inserted glyphs.
The area at pixel (X,Y) of width WIDTH and height HEIGHT is
shifted right by SHIFT_BY pixels. */
void (*shift_glyphs_for_insert) P_ ((struct frame *f,
int x, int y, int width,
int height, int shift_by));
/* Structure forward declarations. */
struct image;
/* Each image format (JPEG, TIFF, ...) supported is described by
a structure of the type below. */
struct image_type
/* A symbol uniquely identifying the image type, .e.g `jpeg'. */
Lisp_Object *type;
/* Check that SPEC is a valid image specification for the given
image type. Value is non-zero if SPEC is valid. */
int (* valid_p) P_ ((Lisp_Object spec));
/* Load IMG which is used on frame F from information contained in
IMG->spec. Value is non-zero if successful. */
int (* load) P_ ((struct frame *f, struct image *img));
/* Free resources of image IMG which is used on frame F. */
void (* free) P_ ((struct frame *f, struct image *img));
/* Next in list of all supported image types. */
struct image_type *next;
/* Structure describing an image. Specific image formats like XBM are
converted into this form, so that display only has to deal with
this type of image. */
struct image
/* The time in seconds at which the image was last displayed. Set
in prepare_image_for_display. */
unsigned long timestamp;
/* Pixmaps of the image. */
Pixmap pixmap, mask;
/* Colors allocated for this image, if any. Allocated via xmalloc. */
unsigned long *colors;
int ncolors;
/* A single `background color' for this image, for the use of anyone that
cares about such a thing. Only valid if the `background_valid' field
is true. This should generally be accessed by calling the accessor
macro `IMAGE_BACKGROUND', which will heuristically calculate a value
if necessary. */
unsigned long background;
/* Foreground and background colors of the frame on which the image
is created. */
unsigned long frame_foreground, frame_background;
/* True if this image has a `transparent' background -- that is, is
uses an image mask. The accessor macro for this is
unsigned background_transparent : 1;
/* True if the `background' and `background_transparent' fields are
valid, respectively. */
unsigned background_valid : 1, background_transparent_valid : 1;
/* Width and height of the image. */
int width, height;
/* These values are used for the rectangles displayed for images
that can't be loaded. */
/* Top/left and bottom/right corner pixel of actual image data.
Used by four_corners_best to consider the real image data,
rather than looking at the optional image margin. */
int corners[4];
#define TOP_CORNER 0
#define LEFT_CORNER 1
#define BOT_CORNER 2
#define RIGHT_CORNER 3
/* Percent of image height used as ascent. A value of
CENTERED_IMAGE_ASCENT means draw the image centered on the
line. */
int ascent;
/* Lisp specification of this image. */
Lisp_Object spec;
/* List of "references" followed to build the image.
Typically will just contain the name of the image file.
Used to allow fine-grained cache flushing. */
Lisp_Object dependencies;
/* Relief to draw around the image. */
int relief;
/* Optional margins around the image. This includes the relief. */
int hmargin, vmargin;
/* Reference to the type of the image. */
struct image_type *type;
/* 1 means that loading the image failed. Don't try again. */
unsigned load_failed_p;
/* A place for image types to store additional data. The member
data.lisp_val is marked during GC, so it's safe to store Lisp data
there. Image types should free this data when their `free'
function is called. */
int int_val;
void *ptr_val;
Lisp_Object lisp_val;
} data;
/* Hash value of image specification to speed up comparisons. */
unsigned hash;
/* Image id of this image. */
int id;
/* Hash collision chain. */
struct image *next, *prev;
/* Cache of images. Each frame has a cache. X frames with the same
x_display_info share their caches. */
struct image_cache
/* Hash table of images. */
struct image **buckets;
/* Vector mapping image ids to images. */
struct image **images;
/* Allocated size of `images'. */
unsigned size;
/* Number of images in the cache. */
unsigned used;
/* Reference count (number of frames sharing this cache). */
int refcount;
/* Value is a pointer to the image with id ID on frame F, or null if
no image with that id exists. */
#define IMAGE_FROM_ID(F, ID) \
(((ID) >= 0 && (ID) < (FRAME_IMAGE_CACHE (F)->used)) \
? FRAME_IMAGE_CACHE (F)->images[ID] \
/* Size of bucket vector of image caches. Should be prime. */
/* Enumeration defining where to find tool-bar item information in
tool-bar items vectors stored with frames. Each tool-bar item
occupies TOOL_BAR_ITEM_NSLOTS elements in such a vector. */
enum tool_bar_item_idx
/* The key of the tool-bar item. Used to remove items when a binding
for `undefined' is found. */
/* Non-nil if item is enabled. */
/* Non-nil if item is visible. */
/* Non-nil if item is selected (pressed). */
/* Caption. */
/* Image(s) to display. This is either a single image specification
or a vector of specifications. */
/* The binding. */
/* Button type. One of nil, `:radio' or `:toggle'. */
/* Help string. */
/* Icon file name of right to left image when an RTL locale is used. */
/* Sentinel = number of slots in tool_bar_items occupied by one
tool-bar item. */
/* An enumeration for the different images that can be specified
for a tool-bar item. */
enum tool_bar_item_image
/* Margin around tool-bar buttons in pixels. */
extern Lisp_Object Vtool_bar_button_margin;
/* Thickness of relief to draw around tool-bar buttons. */
extern EMACS_INT tool_bar_button_relief;
/* Default values of the above variables. */
/* The height in pixels of the default tool-bar images. */
Terminal Capabilities
/* Each of these is a bit representing a terminal `capability' (bold,
inverse, etc). They are or'd together to specify the set of
capabilities being queried for when calling `tty_capable_p' (which
returns true if the terminal supports all of them). */
#define TTY_CAP_INVERSE 0x01
#define TTY_CAP_UNDERLINE 0x02
#define TTY_CAP_BOLD 0x04
#define TTY_CAP_DIM 0x08
#define TTY_CAP_BLINK 0x10
#define TTY_CAP_ALT_CHARSET 0x20
Function Prototypes
/* Defined in xdisp.c */
struct glyph_row *row_containing_pos P_ ((struct window *, int,
struct glyph_row *,
struct glyph_row *, int));
int string_buffer_position P_ ((struct window *, Lisp_Object, int));
int line_bottom_y P_ ((struct it *));
int display_prop_intangible_p P_ ((Lisp_Object));
void resize_echo_area_exactly P_ ((void));
int resize_mini_window P_ ((struct window *, int));
int try_window P_ ((Lisp_Object, struct text_pos, int));
void window_box P_ ((struct window *, int, int *, int *, int *, int *));
int window_box_height P_ ((struct window *));
int window_text_bottom_y P_ ((struct window *));
int window_box_width P_ ((struct window *, int));
int window_box_left P_ ((struct window *, int));
int window_box_left_offset P_ ((struct window *, int));
int window_box_right P_ ((struct window *, int));
int window_box_right_offset P_ ((struct window *, int));
void window_box_edges P_ ((struct window *, int, int *, int *, int *, int *));
int estimate_mode_line_height P_ ((struct frame *, enum face_id));
void pixel_to_glyph_coords P_ ((struct frame *, int, int, int *, int *,
NativeRectangle *, int));
int glyph_to_pixel_coords P_ ((struct window *, int, int, int *, int *));
void remember_mouse_glyph P_ ((struct frame *, int, int, NativeRectangle *));
void mark_window_display_accurate P_ ((Lisp_Object, int));
void redisplay_preserve_echo_area P_ ((int));
int set_cursor_from_row P_ ((struct window *, struct glyph_row *,
struct glyph_matrix *, int, int, int, int));
void init_iterator P_ ((struct it *, struct window *, int,
int, struct glyph_row *, enum face_id));
void init_iterator_to_row_start P_ ((struct it *, struct window *,
struct glyph_row *));
int get_next_display_element P_ ((struct it *));
void set_iterator_to_next P_ ((struct it *, int));
void start_display P_ ((struct it *, struct window *, struct text_pos));
void move_it_to P_ ((struct it *, int, int, int, int, int));
void move_it_vertically P_ ((struct it *, int));
void move_it_vertically_backward P_ ((struct it *, int));
void move_it_by_lines P_ ((struct it *, int, int));
void move_it_past_eol P_ ((struct it *));
void move_it_in_display_line (struct it *it,
EMACS_INT to_charpos, int to_x,
enum move_operation_enum op);
int in_display_vector_p P_ ((struct it *));
int frame_mode_line_height P_ ((struct frame *));
void highlight_trailing_whitespace P_ ((struct frame *, struct glyph_row *));
extern Lisp_Object Qtool_bar;
extern Lisp_Object Vshow_trailing_whitespace;
extern int mode_line_in_non_selected_windows;
extern int redisplaying_p;
extern void add_to_log P_ ((char *, Lisp_Object, Lisp_Object));
extern int help_echo_showing_p;
extern int current_mode_line_height, current_header_line_height;
extern Lisp_Object help_echo_string, help_echo_window;
extern Lisp_Object help_echo_object, previous_help_echo_string;
extern int help_echo_pos;
extern struct frame *last_mouse_frame;
extern int last_tool_bar_item;
extern Lisp_Object Vmouse_autoselect_window;
extern int unibyte_display_via_language_environment;
extern EMACS_INT underline_minimum_offset;
extern void reseat_at_previous_visible_line_start P_ ((struct it *));
extern int calc_pixel_width_or_height P_ ((double *, struct it *, Lisp_Object,
struct font *, int, int *));
extern void dump_glyph_string P_ ((struct glyph_string *));
extern void x_get_glyph_overhangs P_ ((struct glyph *, struct frame *,
int *, int *));
extern void x_produce_glyphs P_ ((struct it *));
extern void x_write_glyphs P_ ((struct glyph *, int));
extern void x_insert_glyphs P_ ((struct glyph *, int len));
extern void x_clear_end_of_line P_ ((int));
extern int x_stretch_cursor_p;
extern struct cursor_pos output_cursor;
extern void x_fix_overlapping_area P_ ((struct window *, struct glyph_row *,
enum glyph_row_area, int));
extern void draw_phys_cursor_glyph P_ ((struct window *,
struct glyph_row *,
enum draw_glyphs_face));
extern void get_phys_cursor_geometry P_ ((struct window *, struct glyph_row *,
struct glyph *, int *, int *, int *));
extern void erase_phys_cursor P_ ((struct window *));
extern void display_and_set_cursor P_ ((struct window *,
int, int, int, int, int));
extern void set_output_cursor P_ ((struct cursor_pos *));
extern void x_cursor_to P_ ((int, int, int, int));
extern void x_update_cursor P_ ((struct frame *, int));
extern void x_clear_cursor P_ ((struct window *));
extern void x_draw_vertical_border P_ ((struct window *w));
extern void frame_to_window_pixel_xy P_ ((struct window *, int *, int *));
extern int get_glyph_string_clip_rects P_ ((struct glyph_string *,
NativeRectangle *, int));
extern void get_glyph_string_clip_rect P_ ((struct glyph_string *,
NativeRectangle *nr));
extern Lisp_Object find_hot_spot P_ ((Lisp_Object, int, int));
extern void note_mouse_highlight P_ ((struct frame *, int, int));
extern void x_clear_window_mouse_face P_ ((struct window *));
extern void cancel_mouse_face P_ ((struct frame *));
extern void handle_tool_bar_click P_ ((struct frame *,
int, int, int, unsigned int));
/* msdos.c defines its own versions of these functions. */
extern int clear_mouse_face P_ ((Display_Info *));
extern void show_mouse_face P_ ((Display_Info *, enum draw_glyphs_face));
extern int cursor_in_mouse_face_p P_ ((struct window *w));
extern void expose_frame P_ ((struct frame *, int, int, int, int));
extern int x_intersect_rectangles P_ ((XRectangle *, XRectangle *,
XRectangle *));
/* Flags passed to try_window. */
/* Defined in fringe.c */
int lookup_fringe_bitmap (Lisp_Object);
void draw_fringe_bitmap P_ ((struct window *, struct glyph_row *, int));
void draw_row_fringe_bitmaps P_ ((struct window *, struct glyph_row *));
int draw_window_fringes P_ ((struct window *, int));
int update_window_fringes P_ ((struct window *, int));
void compute_fringe_widths P_ ((struct frame *, int));
void w32_init_fringe P_ ((struct redisplay_interface *));
void w32_reset_fringes P_ ((void));
/* Defined in image.c */
extern int x_bitmap_height P_ ((struct frame *, int));
extern int x_bitmap_width P_ ((struct frame *, int));
extern int x_bitmap_pixmap P_ ((struct frame *, int));
extern void x_reference_bitmap P_ ((struct frame *, int));
extern int x_create_bitmap_from_data P_ ((struct frame *, char *,
unsigned int, unsigned int));
extern int x_create_bitmap_from_file P_ ((struct frame *, Lisp_Object));
#if defined (HAVE_XPM) && defined (HAVE_X_WINDOWS)
extern int x_create_bitmap_from_xpm_data P_ ((struct frame *f, char **bits));
#ifndef x_destroy_bitmap
extern void x_destroy_bitmap P_ ((struct frame *, int));
extern void x_destroy_all_bitmaps P_ ((Display_Info *));
extern int x_create_bitmap_mask P_ ((struct frame * , int));
extern Lisp_Object x_find_image_file P_ ((Lisp_Object));
void x_kill_gs_process P_ ((Pixmap, struct frame *));
struct image_cache *make_image_cache P_ ((void));
void free_image_cache P_ ((struct frame *));
void clear_image_caches P_ ((Lisp_Object));
void mark_image_cache P_ ((struct image_cache *));
int valid_image_p P_ ((Lisp_Object));
void prepare_image_for_display P_ ((struct frame *, struct image *));
int lookup_image P_ ((struct frame *, Lisp_Object));
unsigned long image_background P_ ((struct image *, struct frame *,
XImagePtr_or_DC ximg));
int image_background_transparent P_ ((struct image *, struct frame *,
XImagePtr_or_DC mask));
int image_ascent P_ ((struct image *, struct face *, struct glyph_slice *));
/* Defined in sysdep.c */
void get_tty_size P_ ((int, int *, int *));
void request_sigio P_ ((void));
void unrequest_sigio P_ ((void));
int tabs_safe_p P_ ((int));
void init_baud_rate P_ ((int));
void init_sigio P_ ((int));
/* Defined in xfaces.c */
void x_free_colors P_ ((struct frame *, unsigned long *, int));
void update_face_from_frame_parameter P_ ((struct frame *, Lisp_Object,
Lisp_Object tty_color_name P_ ((struct frame *, int));
void clear_face_cache P_ ((int));
unsigned long load_color P_ ((struct frame *, struct face *, Lisp_Object,
enum lface_attribute_index));
void unload_color P_ ((struct frame *, unsigned long));
char *choose_face_font P_ ((struct frame *, Lisp_Object *, Lisp_Object,
int *));
int ascii_face_of_lisp_face P_ ((struct frame *, int));
void prepare_face_for_display P_ ((struct frame *, struct face *));
int xstrcasecmp P_ ((const unsigned char *, const unsigned char *));
int lookup_face P_ ((struct frame *, Lisp_Object *));
int lookup_named_face P_ ((struct frame *, Lisp_Object, int));
int lookup_basic_face P_ ((struct frame *, int));
int smaller_face P_ ((struct frame *, int, int));
int face_with_height P_ ((struct frame *, int, int));
int lookup_derived_face P_ ((struct frame *, Lisp_Object, int, int));
void init_frame_faces P_ ((struct frame *));
void free_frame_faces P_ ((struct frame *));
void recompute_basic_faces P_ ((struct frame *));
int face_at_buffer_position P_ ((struct window *w, EMACS_INT pos,
EMACS_INT region_beg, EMACS_INT region_end,
EMACS_INT *endptr, EMACS_INT limit,
int mouse, int base_face_id));
int face_for_overlay_string P_ ((struct window *w, EMACS_INT pos,
EMACS_INT region_beg, EMACS_INT region_end,
EMACS_INT *endptr, EMACS_INT limit,
int mouse, Lisp_Object overlay));
int face_at_string_position P_ ((struct window *w, Lisp_Object string,
EMACS_INT pos, EMACS_INT bufpos,
EMACS_INT region_beg, EMACS_INT region_end,
EMACS_INT *endptr, enum face_id, int mouse));
int merge_faces P_ ((struct frame *, Lisp_Object, int, int));
int compute_char_face P_ ((struct frame *, int, Lisp_Object));
void free_all_realized_faces P_ ((Lisp_Object));
void free_realized_face P_ ((struct frame *, struct face *));
extern Lisp_Object Qforeground_color, Qbackground_color;
extern Lisp_Object Qframe_set_background_mode;
extern char unspecified_fg[], unspecified_bg[];
extern Lisp_Object Vface_remapping_alist;
/* Defined in xfns.c */
void gamma_correct P_ ((struct frame *, XColor *));
void gamma_correct P_ ((struct frame *, COLORREF *));
int x_screen_planes P_ ((struct frame *));
void x_implicitly_set_name P_ ((struct frame *, Lisp_Object, Lisp_Object));
extern Lisp_Object tip_frame;
extern Window tip_window;
EXFUN (Fx_show_tip, 6);
EXFUN (Fx_hide_tip, 0);
extern void start_hourglass P_ ((void));
extern void cancel_hourglass P_ ((void));
extern int hourglass_started P_ ((void));
extern int display_hourglass_p;
extern int hourglass_shown_p;
struct atimer; /* Defined in atimer.h. */
/* If non-null, an asynchronous timer that, when it expires, displays
an hourglass cursor on all frames. */
extern struct atimer *hourglass_atimer;
/* Each GUI implements these. FIXME: move into RIF. */
extern void show_hourglass P_ ((struct atimer *));
extern void hide_hourglass P_ ((void));
/* Returns the background color of IMG, calculating one heuristically if
necessary. If non-zero, XIMG is an existing XImage object to use for
the heuristic. */
#define IMAGE_BACKGROUND(img, f, ximg) \
((img)->background_valid \
? (img)->background \
: image_background (img, f, ximg))
/* Returns true if IMG has a `transparent' background, using heuristics
to decide if necessary. If non-zero, MASK is an existing XImage
object to use for the heuristic. */
#define IMAGE_BACKGROUND_TRANSPARENT(img, f, mask) \
((img)->background_transparent_valid \
? (img)->background_transparent \
: image_background_transparent (img, f, mask))
/* Defined in xmenu.c */
int popup_activated P_ ((void));
/* Defined in dispnew.c */
extern int inverse_video;
extern int required_matrix_width P_ ((struct window *));
extern int required_matrix_height P_ ((struct window *));
extern Lisp_Object buffer_posn_from_coords P_ ((struct window *,
int *, int *,
struct display_pos *,
Lisp_Object *,
int *, int *, int *, int *));
extern Lisp_Object mode_line_string P_ ((struct window *, enum window_part,
int *, int *, int *,
Lisp_Object *,
int *, int *, int *, int *));
extern Lisp_Object marginal_area_string P_ ((struct window *, enum window_part,
int *, int *, int *,
Lisp_Object *,
int *, int *, int *, int *));
extern void redraw_frame P_ ((struct frame *));
extern void redraw_garbaged_frames P_ ((void));
extern void cancel_line P_ ((int, struct frame *));
extern void init_desired_glyphs P_ ((struct frame *));
extern int scroll_frame_lines P_ ((struct frame *, int, int, int, int));
extern int direct_output_for_insert P_ ((int));
extern int direct_output_forward_char P_ ((int));
extern int update_frame P_ ((struct frame *, int, int));
extern int scrolling P_ ((struct frame *));
extern void bitch_at_user P_ ((void));
void adjust_glyphs P_ ((struct frame *));
void free_glyphs P_ ((struct frame *));
void free_window_matrices P_ ((struct window *));
void check_glyph_memory P_ ((void));
void mirrored_line_dance P_ ((struct glyph_matrix *, int, int, int *, char *));
void clear_glyph_matrix P_ ((struct glyph_matrix *));
void clear_current_matrices P_ ((struct frame *f));
void clear_desired_matrices P_ ((struct frame *));
void shift_glyph_matrix P_ ((struct window *, struct glyph_matrix *,
int, int, int));
void rotate_matrix P_ ((struct glyph_matrix *, int, int, int));
void increment_matrix_positions P_ ((struct glyph_matrix *,
int, int, int, int));
void blank_row P_ ((struct window *, struct glyph_row *, int));
void increment_row_positions P_ ((struct glyph_row *, int, int));
void enable_glyph_matrix_rows P_ ((struct glyph_matrix *, int, int, int));
void clear_glyph_row P_ ((struct glyph_row *));
void prepare_desired_row P_ ((struct glyph_row *));
int line_hash_code P_ ((struct glyph_row *));
void set_window_update_flags P_ ((struct window *, int));
void redraw_frame P_ ((struct frame *));
void redraw_garbaged_frames P_ ((void));
int scroll_cost P_ ((struct frame *, int, int, int));
int direct_output_for_insert P_ ((int));
int direct_output_forward_char P_ ((int));
int update_frame P_ ((struct frame *, int, int));
void update_single_window P_ ((struct window *, int));
int scrolling P_ ((struct frame *));
void do_pending_window_change P_ ((int));
void change_frame_size P_ ((struct frame *, int, int, int, int, int));
void bitch_at_user P_ ((void));
void init_display P_ ((void));
void syms_of_display P_ ((void));
extern Lisp_Object Qredisplay_dont_pause;
void spec_glyph_lookup_face P_ ((struct window *, GLYPH *));
/* Defined in terminal.c */
extern void ring_bell P_ ((struct frame *));
extern void update_begin P_ ((struct frame *));
extern void update_end P_ ((struct frame *));
extern void set_terminal_window P_ ((struct frame *, int));
extern void cursor_to P_ ((struct frame *, int, int));
extern void raw_cursor_to P_ ((struct frame *, int, int));
extern void clear_to_end P_ ((struct frame *));
extern void clear_frame P_ ((struct frame *));
extern void clear_end_of_line P_ ((struct frame *, int));
extern void write_glyphs P_ ((struct frame *, struct glyph *, int));
extern void insert_glyphs P_ ((struct frame *, struct glyph *, int));
extern void delete_glyphs P_ ((struct frame *, int));
extern void ins_del_lines P_ ((struct frame *, int, int));
extern struct terminal *init_initial_terminal P_ ((void));
/* Defined in term.c */
extern void tty_set_terminal_modes P_ ((struct terminal *));
extern void tty_reset_terminal_modes P_ ((struct terminal *));
extern void tty_turn_off_insert P_ ((struct tty_display_info *));
extern void tty_turn_off_highlight P_ ((struct tty_display_info *));
extern int string_cost P_ ((char *));
extern int per_line_cost P_ ((char *));
extern void calculate_costs P_ ((struct frame *));
extern void produce_glyphs P_ ((struct it *));
extern void produce_special_glyphs P_ ((struct it *, enum display_element_type));
extern int tty_capable_p P_ ((struct tty_display_info *, unsigned, unsigned long, unsigned long));
extern void set_tty_color_mode (struct tty_display_info *, struct frame *);
extern struct terminal *get_tty_terminal P_ ((Lisp_Object, int));
extern struct terminal *get_named_tty P_ ((char *));
EXFUN (Ftty_type, 1);
extern void create_tty_output P_ ((struct frame *));
extern struct terminal *init_tty P_ ((char *, char *, int));
/* Defined in scroll.c */
extern int scrolling_max_lines_saved P_ ((int, int, int *, int *, int *));
extern int scroll_cost P_ ((struct frame *, int, int, int));
extern void do_line_insertion_deletion_costs P_ ((struct frame *, char *,
char *, char *, char *,
char *, char *, int));
void scrolling_1 P_ ((struct frame *, int, int, int, int *, int *, int *,
int *, int));
/* Defined in frame.c */
/* Types we might convert a resource string into. */
enum resource_types
extern Lisp_Object x_get_arg P_ ((Display_Info *, Lisp_Object,
Lisp_Object, char *, char *class,
enum resource_types));
extern Lisp_Object x_frame_get_arg P_ ((struct frame *, Lisp_Object,
Lisp_Object, char *, char *,
enum resource_types));
extern Lisp_Object x_frame_get_and_record_arg P_ ((
struct frame *, Lisp_Object,
Lisp_Object, char *, char *,
enum resource_types));
extern Lisp_Object x_default_parameter P_ ((struct frame *, Lisp_Object,
Lisp_Object, Lisp_Object,
char *, char *,
enum resource_types));
#endif /* not DISPEXTERN_H_INCLUDED */
/* arch-tag: c65c475f-1c1e-4534-8795-990b8509fd65
(do not change this comment) */
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