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/* "Face" primitives.
Copyright (C) 1993, 1994 Free Software Foundation.
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 2, 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
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This is derived from work by Lucid (some parts very loosely so). */
#include <sys/types.h>
#include <sys/stat.h>
#include <config.h>
#include "lisp.h"
#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#include "buffer.h"
#include "dispextern.h"
#include "frame.h"
#include "blockinput.h"
#include "window.h"
#include "multi-frame.h"
/* Compensate for bug in Xos.h on some systems, on which it requires
time.h. On some such systems, Xos.h tries to redefine struct
timeval and struct timezone if USG is #defined while it is
#included. */
#ifdef XOS_NEEDS_TIME_H
#include <time.h>
#undef USG
#include <X11/Xos.h>
#define USG
#define __TIMEVAL__
#else
#include <X11/Xos.h>
#endif
/* An explanation of the face data structures. */
/* ========================= Face Data Structures =========================
Let FACE-NAME be a symbol naming a face.
Let FACE-VECTOR be (assq FACE-NAME (frame-face-alist FRAME))
FACE-VECTOR is either nil, or a vector of the form
[face NAME ID FONT FOREGROUND BACKGROUND BACKGROUND-PIXMAP UNDERLINE-P
FONTSIZE]
where
face is the symbol `face',
NAME is the symbol with which this vector is associated (a backpointer),
ID is the face ID, an integer used internally by the C code to identify
the face,
FONT, FOREGROUND, and BACKGROUND are strings naming the fonts and colors
to use with the face,
BACKGROUND-PIXMAP is the name of an x bitmap filename, which we don't
use right now, and
UNDERLINE-P is non-nil if the face should be underlined.
If any of these elements are nil, that parameter is considered
unspecified; parameters from faces specified by lower-priority
overlays or text properties, or the parameters of the frame itself,
can show through. (lisp/faces.el maintains these lists.)
(assq FACE-NAME global-face-data) returns a vector describing the
global parameters for that face.
Let PARAM-FACE be FRAME->display.x->param_faces[Faref (FACE-VECTOR, 2)].
PARAM_FACE is a struct x_face whose members are the Xlib analogues of
the parameters in FACE-VECTOR. If an element of FACE-VECTOR is
nil, then the corresponding member of PARAM_FACE is FACE_DEFAULT.
These faces are called "parameter faces", because they're the ones
lisp manipulates to control what gets displayed. Elements 0 and 1
of FRAME->display.x->param_faces are special - they describe the
default and mode line faces. None of the faces in param_faces have
GC's. (See src/dispextern.h for the definiton of struct x_face.
lisp/faces.el maintains the isomorphism between face_alist and
param_faces.)
The functions x_compute_char_face and x_compute_glyph_face find and
combine the parameter faces associated with overlays and text
properties. The resulting faces are called "computed faces"; none
of their members are FACE_DEFAULT; they are completely specified.
They then call intern_compute_face to search
FRAME->display.x->computed_faces for a matching face, add one if
none is found, and return the index into
FRAME->display.x->computed_faces. FRAME's glyph matrices use these
indices to record the faces of the matrix characters, and the X
display hooks consult compute_faces to decide how to display these
characters. Elements 0 and 1 of computed_faces always describe the
default and mode-line faces.
Elements 0 and 1 of computed_faces have GC's; all the other faces
in computed_faces do not. The global array face_vector contains
faces with their GC's set. Given a computed_face, the function
x_intern_face finds (or adds) an element of face_vector with
equivalent parameters, and returns a pointer to that face, whose GC
can then be used for display.
Constraints:
Symbols naming faces must have associations on all frames; for any
FRAME, for all FACE-NAME, if (assq FACE-NAME (frame-face-alist
FRAME)) is non-nil, it must be non-nil for all frames.
Analogously, indices into param_faces must be valid on all frames;
if param_faces[i] is a non-zero face pointer on one frame, then it
must be filled in on all frames. Code assumes that face ID's can
be used on any frame.
Some subtleties:
Why do we keep param_faces and computed_faces separate?
computed_faces contains an element for every combination of facial
parameters we have ever displayed. indices into param_faces have
to be valid on all frames. If they were the same array, then that
array would grow very large on all frames, because any facial
combination displayed on any frame would need to be a valid entry
on all frames.
Since face_vector is just a cache --- there are no pointers into it
from the rest of the code, and everyone accesses it through
x_intern_face --- we could just free its GC's and throw the whole
thing away without breaking anything. This gives us a simple way
to garbage-collect old GC's nobody's using any more - we can just
purge face_vector, and then let subsequent calls to x_intern_face
refill it as needed. The function clear_face_vector performs this
purge.
We're often applying x_intern_face to faces in computed_faces -
for example, we do this while sending GLYPHs from a struct
frame_glyphs to X during redisplay. It would be nice to avoid
searching all of face_vector every time we intern a frame's face.
So, when x_intern_face finds a match for FACE in face_vector, it
stores the index of the match in FACE's cached_index member, and
checks there first next time. */
/* Definitions and declarations. */
/* A table of display faces. */
static struct x_face **face_vector;
/* The length in use of the table. */
static int nfaces;
/* The allocated length of the table. */
static int nfaces_allocated;
/* The number of face-id's in use (same for all frames). */
int x_next_face_id;
/* This is what appears in a slot in a face to signify that the face
does not specify that display aspect. */
#define FACE_DEFAULT (~0)
static void build_face ( /* FRAME_PTR, struct x_face * */ );
int x_face_name_id_number ( /* FRAME_PTR, Lisp_Object name */ );
struct x_face *x_intern_face ( /* FRAME_PTR, struct x_face * */ );
static int new_computed_face ( /* FRAME_PTR, struct x_face * */ );
static int intern_computed_face ( /* FRAME_PTR, struct x_face * */ );
static void ensure_face_ready ( /* FRAME_PTR, int id */ );
void x_recompute_basic_faces ( /* FRAME_PTR f */ );
/* Allocating, copying, and comparing struct x_faces. */
/* Allocate a new face */
static struct x_face *
allocate_face ()
{
struct x_face *result = (struct x_face *) xmalloc (sizeof (struct x_face));
bzero (result, sizeof (struct x_face));
result->font = (XFontStruct *) FACE_DEFAULT;
result->foreground = FACE_DEFAULT;
result->background = FACE_DEFAULT;
result->stipple = FACE_DEFAULT;
return result;
}
/* Make a new face that's a copy of an existing one. */
static struct x_face *
copy_face (face)
struct x_face *face;
{
struct x_face *result = allocate_face ();
result->font = face->font;
result->foreground = face->foreground;
result->background = face->background;
result->stipple = face->stipple;
result->underline = face->underline;
return result;
}
static int
face_eql (face1, face2)
struct x_face *face1, *face2;
{
return ( face1->font == face2->font
&& face1->foreground == face2->foreground
&& face1->background == face2->background
&& face1->stipple == face2->stipple
&& face1->underline == face2->underline);
}
/* Interning faces in the `face_vector' cache, and clearing that cache. */
/* Return the unique display face corresponding to the user-level face FACE.
If there isn't one, make one, and find a slot in the face_vector to
put it in. */
static struct x_face *
get_cached_face (f, face)
struct frame *f;
struct x_face *face;
{
int i, empty = -1;
struct x_face *result;
/* Perhaps FACE->cached_index is valid; this could happen if FACE is
in a frame's face list. */
if (face->cached_index >= 0
&& face->cached_index < nfaces
&& face_eql (face_vector[face->cached_index], face))
return face_vector[face->cached_index];
/* Look for an existing display face that does the job.
Also find an empty slot if any. */
for (i = 0; i < nfaces; i++)
{
if (face_eql (face_vector[i], face))
{
face->cached_index = i;
return face_vector[i];
}
if (face_vector[i] == 0)
empty = i;
}
/* If no empty slots, make one. */
if (empty < 0 && nfaces == nfaces_allocated)
{
int newsize = nfaces + 20;
face_vector
= (struct x_face **) xrealloc (face_vector,
newsize * sizeof (struct x_face *));
nfaces_allocated = newsize;
}
if (empty < 0)
empty = nfaces++;
/* Put a new display face in the empty slot. */
result = copy_face (face);
face_vector[empty] = result;
/* Make a graphics context for it. */
build_face (f, result);
face->cached_index = empty;
return result;
}
/* Given a computed face, return an equivalent display face
(one which has a graphics context). */
struct x_face *
x_intern_face (f, face)
struct frame *f;
struct x_face *face;
{
/* If it's equivalent to the default face, use that. */
if (face_eql (face, FRAME_DEFAULT_FACE (f)))
{
if (!FRAME_DEFAULT_FACE (f)->gc)
build_face (f, FRAME_DEFAULT_FACE (f));
return FRAME_DEFAULT_FACE (f);
}
/* If it's equivalent to the mode line face, use that. */
if (face_eql (face, FRAME_MODE_LINE_FACE (f)))
{
if (!FRAME_MODE_LINE_FACE (f)->gc)
build_face (f, FRAME_MODE_LINE_FACE (f));
return FRAME_MODE_LINE_FACE (f);
}
/* If it's not one of the frame's default faces, it shouldn't have a GC. */
if (face->gc)
abort ();
/* Get a specialized display face. */
return get_cached_face (f, face);
}
/* Clear out face_vector and start anew.
This should be done from time to time just to avoid
keeping too many graphics contexts in face_vector
that are no longer needed. */
void
x_clear_face_vector ()
{
Lisp_Object rest;
Display *dpy = x_current_display;
int i;
BLOCK_INPUT;
/* Free the display faces in the face_vector. */
for (i = 0; i < nfaces; i++)
{
struct x_face *face = face_vector[i];
if (face->gc)
XFreeGC (dpy, face->gc);
xfree (face);
}
nfaces = 0;
UNBLOCK_INPUT;
}
/* Allocating and freeing X resources for display faces. */
/* Make a graphics context for face FACE, which is on frame F,
if that can be done. */
static void
build_face (f, face)
struct frame *f;
struct x_face *face;
{
GC gc;
XGCValues xgcv;
unsigned long mask;
BLOCK_INPUT;
if (face->foreground != FACE_DEFAULT)
xgcv.foreground = face->foreground;
else
xgcv.foreground = f->display.x->foreground_pixel;
if (face->background != FACE_DEFAULT)
xgcv.background = face->background;
else
xgcv.background = f->display.x->background_pixel;
if (face->font && (int) face->font != FACE_DEFAULT)
xgcv.font = face->font->fid;
else
xgcv.font = f->display.x->font->fid;
xgcv.graphics_exposures = 0;
mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures;
gc = XCreateGC (x_current_display, FRAME_X_WINDOW (f),
mask, &xgcv);
#if 0
if (face->stipple && face->stipple != FACE_DEFAULT)
XSetStipple (x_current_display, gc, face->stipple);
#endif
face->gc = gc;
UNBLOCK_INPUT;
}
/* Allocating, freeing, and duplicating fonts, colors, and pixmaps. */
static XFontStruct *
load_font (f, name)
struct frame *f;
Lisp_Object name;
{
XFontStruct *font;
if (NILP (name))
return (XFontStruct *) FACE_DEFAULT;
CHECK_STRING (name, 0);
BLOCK_INPUT;
font = XLoadQueryFont (x_current_display, (char *) XSTRING (name)->data);
UNBLOCK_INPUT;
if (! font)
Fsignal (Qerror, Fcons (build_string ("undefined font"),
Fcons (name, Qnil)));
return font;
}
static void
unload_font (f, font)
struct frame *f;
XFontStruct *font;
{
if (!font || font == ((XFontStruct *) FACE_DEFAULT))
return;
BLOCK_INPUT;
XFreeFont (x_current_display, font);
UNBLOCK_INPUT;
}
static unsigned long
load_color (f, name)
struct frame *f;
Lisp_Object name;
{
Display *dpy = x_current_display;
Colormap cmap;
XColor color;
int result;
if (NILP (name))
return FACE_DEFAULT;
cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display));
CHECK_STRING (name, 0);
BLOCK_INPUT;
result = XParseColor (dpy, cmap, (char *) XSTRING (name)->data, &color);
UNBLOCK_INPUT;
if (! result)
Fsignal (Qerror, Fcons (build_string ("undefined color"),
Fcons (name, Qnil)));
BLOCK_INPUT;
result = XAllocColor (dpy, cmap, &color);
UNBLOCK_INPUT;
if (! result)
Fsignal (Qerror, Fcons (build_string ("X server cannot allocate color"),
Fcons (name, Qnil)));
return (unsigned long) color.pixel;
}
static void
unload_color (f, pixel)
struct frame *f;
unsigned long pixel;
{
/* Since faces get built by copying parameters from other faces, the
allocation counts for the colors get all screwed up. I don't see
any solution that will take less than 10 minutes, and it's better
to have a color leak than a crash, so I'm just dyking this out.
This isn't really a color leak, anyway - if we ask for it again,
we'll get the same pixel. */
#if 0
Colormap cmap;
Display *dpy = x_current_display;
if (pixel == FACE_DEFAULT
|| pixel == BLACK_PIX_DEFAULT
|| pixel == WHITE_PIX_DEFAULT)
return;
cmap = DefaultColormapOfScreen (DefaultScreenOfDisplay (x_current_display));
BLOCK_INPUT;
XFreeColors (dpy, cmap, &pixel, 1, 0);
UNBLOCK_INPUT;
#endif
}
/* Managing parameter face arrays for frames. */
void
x_init_frame_faces (f)
FRAME_PTR f;
{
ensure_face_ready (f, 0);
ensure_face_ready (f, 1);
FRAME_N_COMPUTED_FACES (f) = 0;
FRAME_SIZE_COMPUTED_FACES (f) = 0;
new_computed_face (f, FRAME_PARAM_FACES (f)[0]);
new_computed_face (f, FRAME_PARAM_FACES (f)[1]);
x_recompute_basic_faces (f);
/* Find another X frame. */
{
Lisp_Object tail, frame, result;
result = Qnil;
FOR_EACH_FRAME (tail, frame)
if (FRAME_X_P (XFRAME (frame))
&& XFRAME (frame) != f)
{
result = frame;
break;
}
/* If we didn't find any X frames other than f, then we don't need
any faces other than 0 and 1, so we're okay. Otherwise, make
sure that all faces valid on the selected frame are also valid
on this new frame. */
if (FRAMEP (result))
{
int i;
int n_faces = FRAME_N_PARAM_FACES (XFRAME (result));
struct x_face **faces = FRAME_PARAM_FACES (XFRAME (result));
for (i = 2; i < n_faces; i++)
if (faces[i])
ensure_face_ready (f, i);
}
}
}
/* Called from Fdelete_frame. */
void
x_free_frame_faces (f)
struct frame *f;
{
Display *dpy = x_current_display;
int i;
BLOCK_INPUT;
for (i = 0; i < FRAME_N_PARAM_FACES (f); i++)
{
struct x_face *face = FRAME_PARAM_FACES (f) [i];
if (face)
{
if (face->gc)
XFreeGC (dpy, face->gc);
unload_font (f, face->font);
unload_color (f, face->foreground);
unload_color (f, face->background);
#if 0
unload_pixmap (f, face->stipple);
#endif
xfree (face);
}
}
xfree (FRAME_PARAM_FACES (f));
FRAME_PARAM_FACES (f) = 0;
FRAME_N_PARAM_FACES (f) = 0;
/* All faces in FRAME_COMPUTED_FACES use resources copied from
FRAME_PARAM_FACES; we can free them without fuss. */
xfree (FRAME_COMPUTED_FACES (f));
FRAME_COMPUTED_FACES (f) = 0;
FRAME_N_COMPUTED_FACES (f) = 0;
UNBLOCK_INPUT;
}
/* Interning faces in a frame's face array. */
static int
new_computed_face (f, new_face)
struct frame *f;
struct x_face *new_face;
{
int i = FRAME_N_COMPUTED_FACES (f);
if (i >= FRAME_SIZE_COMPUTED_FACES (f))
{
int new_size = i + 32;
FRAME_COMPUTED_FACES (f)
= (struct x_face **) (FRAME_SIZE_COMPUTED_FACES (f) == 0
? xmalloc (new_size * sizeof (struct x_face *))
: xrealloc (FRAME_COMPUTED_FACES (f),
new_size * sizeof (struct x_face *)));
FRAME_SIZE_COMPUTED_FACES (f) = new_size;
}
i = FRAME_N_COMPUTED_FACES (f)++;
FRAME_COMPUTED_FACES (f)[i] = copy_face (new_face);
return i;
}
/* Find a match for NEW_FACE in a FRAME's computed face array, and add
it if we don't find one. */
static int
intern_computed_face (f, new_face)
struct frame *f;
struct x_face *new_face;
{
int len = FRAME_N_COMPUTED_FACES (f);
int i;
/* Search for a computed face already on F equivalent to FACE. */
for (i = 0; i < len; i++)
{
if (! FRAME_COMPUTED_FACES (f)[i])
abort ();
if (face_eql (new_face, FRAME_COMPUTED_FACES (f)[i]))
return i;
}
/* We didn't find one; add a new one. */
return new_computed_face (f, new_face);
}
/* Make parameter face id ID valid on frame F. */
static void
ensure_face_ready (f, id)
struct frame *f;
int id;
{
if (FRAME_N_PARAM_FACES (f) <= id)
{
int n = id + 10;
int i;
if (!FRAME_N_PARAM_FACES (f))
FRAME_PARAM_FACES (f)
= (struct x_face **) xmalloc (sizeof (struct x_face *) * n);
else
FRAME_PARAM_FACES (f)
= (struct x_face **) xrealloc (FRAME_PARAM_FACES (f),
sizeof (struct x_face *) * n);
bzero (FRAME_PARAM_FACES (f) + FRAME_N_PARAM_FACES (f),
(n - FRAME_N_PARAM_FACES (f)) * sizeof (struct x_face *));
FRAME_N_PARAM_FACES (f) = n;
}
if (FRAME_PARAM_FACES (f) [id] == 0)
FRAME_PARAM_FACES (f) [id] = allocate_face ();
}
/* Return non-zero if FONT1 and FONT2 have the same width.
We do not check the height, because we can now deal with
different heights.
We assume that they're both character-cell fonts. */
int
x_same_size_fonts (font1, font2)
XFontStruct *font1, *font2;
{
XCharStruct *bounds1 = &font1->min_bounds;
XCharStruct *bounds2 = &font2->min_bounds;
return (bounds1->width == bounds2->width);
}
/* Update the line_height of frame F according to the biggest font in
any face. Return nonzero if if line_height changes. */
int
x_frame_update_line_height (f)
FRAME_PTR f;
{
int i;
int biggest = FONT_HEIGHT (f->display.x->font);
for (i = 0; i < f->display.x->n_param_faces; i++)
if (f->display.x->param_faces[i] != 0
&& f->display.x->param_faces[i]->font != (XFontStruct *) FACE_DEFAULT)
{
int height = FONT_HEIGHT (f->display.x->param_faces[i]->font);
if (height > biggest)
biggest = height;
}
if (biggest == f->display.x->line_height)
return 0;
f->display.x->line_height = biggest;
return 1;
}
/* Modify face TO by copying from FROM all properties which have
nondefault settings. */
static void
merge_faces (from, to)
struct x_face *from, *to;
{
/* Only merge the font if it's the same width as the base font.
Otherwise ignore it, since we can't handle it properly. */
if (from->font != (XFontStruct *) FACE_DEFAULT
&& x_same_size_fonts (from->font, to->font))
to->font = from->font;
if (from->foreground != FACE_DEFAULT)
to->foreground = from->foreground;
if (from->background != FACE_DEFAULT)
to->background = from->background;
if (from->stipple != FACE_DEFAULT)
to->stipple = from->stipple;
if (from->underline)
to->underline = from->underline;
}
/* Set up the basic set of facial parameters, based on the frame's
data; all faces are deltas applied to this. */
static void
compute_base_face (f, face)
FRAME_PTR f;
struct x_face *face;
{
struct x_display *d = f->display.x;
face->gc = 0;
face->foreground = d->foreground_pixel;
face->background = d->background_pixel;
face->font = d->font;
face->stipple = 0;
face->underline = 0;
/* Avoid a face comparison by making this invalid. */
face->cached_index = -1;
}
/* Return the face ID to use to display a special glyph which selects
FACE_CODE as the face ID, assuming that ordinarily the face would
be CURRENT_FACE. F is the frame. */
int
x_compute_glyph_face (f, face_code, current_face)
struct frame *f;
int face_code, current_face;
{
struct x_face face;
face = *FRAME_COMPUTED_FACES (f)[current_face];
if (face_code >= 0 && face_code < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [face_code] != 0)
merge_faces (FRAME_PARAM_FACES (f) [face_code], &face);
return intern_computed_face (f, &face);
}
/* Return the face ID to use to display a special glyph which selects
FACE_CODE as the face ID, assuming that ordinarily the face would
be CURRENT_FACE. F is the frame. */
int
x_compute_glyph_face_1 (f, face_name, current_face)
struct frame *f;
Lisp_Object face_name;
int current_face;
{
struct x_face face;
face = *FRAME_COMPUTED_FACES (f)[current_face];
if (!NILP (face_name))
{
int facecode = x_face_name_id_number (f, face_name);
if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [facecode] != 0)
merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
}
return intern_computed_face (f, &face);
}
/* Return the face ID associated with a buffer position POS.
Store into *ENDPTR the position at which a different face is needed.
This does not take account of glyphs that specify their own face codes.
F is the frame in use for display, and W is a window displaying
the current buffer.
REGION_BEG, REGION_END delimit the region, so it can be highlighted.
LIMIT is a position not to scan beyond. That is to limit
the time this function can take.
If MOUSE is nonzero, use the character's mouse-face, not its face. */
int
x_compute_char_face (f, w, pos, region_beg, region_end, endptr, limit, mouse)
struct frame *f;
struct window *w;
int pos;
int region_beg, region_end;
int *endptr;
int limit;
int mouse;
{
struct x_face face;
Lisp_Object prop, position;
int i, j, noverlays;
int facecode;
Lisp_Object *overlay_vec;
Lisp_Object frame;
int endpos;
Lisp_Object propname;
/* W must display the current buffer. We could write this function
to use the frame and buffer of W, but right now it doesn't. */
if (XBUFFER (w->buffer) != current_buffer)
abort ();
XSET (frame, Lisp_Frame, f);
endpos = ZV;
if (pos < region_beg && region_beg < endpos)
endpos = region_beg;
XFASTINT (position) = pos;
if (mouse)
propname = Qmouse_face;
else
propname = Qface;
prop = Fget_text_property (position, propname, w->buffer);
{
Lisp_Object limit1, end;
XFASTINT (limit1) = (limit < endpos ? limit : endpos);
end = Fnext_single_property_change (position, propname, w->buffer, limit1);
if (INTEGERP (end))
endpos = XINT (end);
}
{
int next_overlay;
int len;
/* First try with room for 40 overlays. */
len = 40;
overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
noverlays = overlays_at (pos, 0, &overlay_vec, &len, &next_overlay);
/* If there are more than 40,
make enough space for all, and try again. */
if (noverlays > len)
{
len = noverlays;
overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
noverlays = overlays_at (pos, 0, &overlay_vec, &len, &next_overlay);
}
if (next_overlay < endpos)
endpos = next_overlay;
}
*endptr = endpos;
/* Optimize the default case. */
if (noverlays == 0 && NILP (prop)
&& !(pos >= region_beg && pos < region_end))
return 0;
compute_base_face (f, &face);
if (!NILP (prop))
{
facecode = x_face_name_id_number (f, prop);
if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [facecode] != 0)
merge_faces (FRAME_PARAM_FACES (f) [facecode], &face);
}
noverlays = sort_overlays (overlay_vec, noverlays, w);
/* Now merge the overlay data in that order. */
for (i = 0; i < noverlays; i++)
{
prop = Foverlay_get (overlay_vec[i], propname);
if (!NILP (prop))
{
Lisp_Object oend;
int oendpos;
facecode = x_face_name_id_number (f, prop);
if (facecode >= 0 && facecode < FRAME_N_PARAM_FACES (f)
&& FRAME_PARAM_FACES (f) [facecode] != 0)
merge_faces (FRAME_PARAM_FACES (f)[facecode], &face);
oend = OVERLAY_END (overlay_vec[i]);
oendpos = OVERLAY_POSITION (oend);
if (oendpos < endpos)
endpos = oendpos;
}
}
if (pos >= region_beg && pos < region_end)
{
if (region_end < endpos)
endpos = region_end;
if (region_face >= 0 && region_face < x_next_face_id)
merge_faces (FRAME_PARAM_FACES (f)[region_face], &face);
}
*endptr = endpos;
return intern_computed_face (f, &face);
}
/* Recompute the GC's for the default and modeline faces.
We call this after changing frame parameters on which those GC's
depend. */
void
x_recompute_basic_faces (f)
FRAME_PTR f;
{
/* If the frame's faces haven't been initialized yet, don't worry about
this stuff. */
if (FRAME_N_PARAM_FACES (f) < 2)
return;
BLOCK_INPUT;
if (FRAME_DEFAULT_FACE (f)->gc)
XFreeGC (x_current_display, FRAME_DEFAULT_FACE (f)->gc);
if (FRAME_MODE_LINE_FACE (f)->gc)
XFreeGC (x_current_display, FRAME_MODE_LINE_FACE (f)->gc);
compute_base_face (f, FRAME_DEFAULT_FACE (f));
compute_base_face (f, FRAME_MODE_LINE_FACE (f));
merge_faces (FRAME_DEFAULT_PARAM_FACE (f), FRAME_DEFAULT_FACE (f));
merge_faces (FRAME_MODE_LINE_PARAM_FACE (f), FRAME_MODE_LINE_FACE (f));
build_face (f, FRAME_DEFAULT_FACE (f));
build_face (f, FRAME_MODE_LINE_FACE (f));
UNBLOCK_INPUT;
}
/* Lisp interface. */
DEFUN ("x-make-face-internal", Fx_make_face_internal, Sx_make_face_internal, 1, 1, 0,
"Create face number FACE-ID on all frames.")
(face_id)
Lisp_Object face_id;
{
Lisp_Object rest;
int id = XINT (face_id);
CHECK_NUMBER (face_id, 0);
if (id < 0 || id >= x_next_face_id)
error ("Face id out of range");
for (rest = Vframe_list; !NILP (rest); rest = XCONS (rest)->cdr)
{
struct frame *f = XFRAME (XCONS (rest)->car);
if (FRAME_X_P (f))
ensure_face_ready (f, id);
}
return Qnil;
}
DEFUN ("x-set-face-attribute-internal", Fx_set_face_attribute_internal,
Sx_set_face_attribute_internal, 4, 4, 0, "")
(face_id, attr_name, attr_value, frame)
Lisp_Object face_id, attr_name, attr_value, frame;
{
struct x_face *face;
struct frame *f;
int magic_p;
int id;
int garbaged = 0;
CHECK_FRAME (frame, 0);
CHECK_NUMBER (face_id, 0);
CHECK_SYMBOL (attr_name, 0);
f = XFRAME (frame);
id = XINT (face_id);
if (id < 0 || id >= x_next_face_id)
error ("Face id out of range");
if (! FRAME_X_P (f))
return Qnil;
ensure_face_ready (f, id);
face = FRAME_PARAM_FACES (f) [XFASTINT (face_id)];
if (EQ (attr_name, intern ("font")))
{
XFontStruct *font = load_font (f, attr_value);
if (face->font != f->display.x->font)
unload_font (f, face->font);
face->font = font;
if (x_frame_update_line_height (f))
x_set_window_size (f, 0, f->width, f->height);
/* Must clear cache, since it might contain the font
we just got rid of. */
garbaged = 1;
}
else if (EQ (attr_name, intern ("foreground")))
{
unsigned long new_color = load_color (f, attr_value);
unload_color (f, face->foreground);
face->foreground = new_color;
garbaged = 1;
}
else if (EQ (attr_name, intern ("background")))
{
unsigned long new_color = load_color (f, attr_value);
unload_color (f, face->background);
face->background = new_color;
garbaged = 1;
}
#if 0
else if (EQ (attr_name, intern ("background-pixmap")))
{
unsigned int w, h, d;
unsigned long new_pixmap = load_pixmap (f, attr_value, &w, &h, &d, 0);
unload_pixmap (f, face->stipple);
if (NILP (attr_value))
new_pixmap = 0;
face->stipple = new_pixmap;
face->pixmap_w = w;
face->pixmap_h = h;
/* face->pixmap_depth = d; */
}
#endif /* 0 */
else if (EQ (attr_name, intern ("underline")))
{
int new = !NILP (attr_value);
face->underline = new;
}
else if (EQ (attr_name, intern ("fontsize")))
{
/* XXX Just ignore fontsize for now. Other windowsystems need it. XXX */
}
else
error ("unknown face attribute");
if (id == 0 || id == 1)
x_recompute_basic_faces (f);
/* We must redraw the frame whenever any face font or color changes,
because it's possible that a merged (display) face
contains the font or color we just replaced.
And we must inhibit any Expose events until the redraw is done,
since they would try to use the invalid display faces. */
if (garbaged)
SET_FRAME_GARBAGED (f);
return Qnil;
}
DEFUN ("x-internal-next-face-id", Fx_internal_next_face_id, Sx_internal_next_face_id,
0, 0, 0, "")
()
{
return make_number (x_next_face_id++);
}
/* Return the face id for name NAME on frame FRAME.
(It should be the same for all frames,
but it's as easy to use the "right" frame to look it up
as to use any other one.) */
int
x_face_name_id_number (f, name)
FRAME_PTR f;
Lisp_Object name;
{
Lisp_Object tem;
tem = Fcdr (assq_no_quit (name, f->face_alist));
if (NILP (tem))
return 0;
CHECK_VECTOR (tem, 0);
tem = XVECTOR (tem)->contents[2];
CHECK_NUMBER (tem, 0);
return XINT (tem);
}
/* Emacs initialization. */
void
syms_of_xfaces ()
{
defsubr (&Sx_make_face_internal);
defsubr (&Sx_set_face_attribute_internal);
defsubr (&Sx_internal_next_face_id);
}
#endif /* HAVE_X_WINDOWS */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.