/usr/lib/xemacs-21.4.22/x86_64-linux-gnu/include/extents.h is in xemacs21-bin 21.4.22-4ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 | /* Copyright (c) 1994, 1995 Free Software Foundation.
Copyright (c) 1995 Ben Wing.
This file is part of XEmacs.
XEmacs 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.
XEmacs 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 XEmacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Synched up with: Not in FSF. */
#ifndef INCLUDED_extents_h_
#define INCLUDED_extents_h_
DECLARE_LRECORD (extent, struct extent);
#define XEXTENT(x) XRECORD (x, extent, struct extent)
#define XSETEXTENT(x, p) XSETRECORD (x, p, extent)
#define EXTENTP(x) RECORDP (x, extent)
#define CHECK_EXTENT(x) CHECK_RECORD (x, extent)
#define CONCHECK_EXTENT(x) CONCHECK_RECORD (x, extent)
/* the layouts for glyphs (extent->flags.glyph_layout). Must fit in 2 bits. */
typedef enum glyph_layout
{
GL_TEXT,
GL_OUTSIDE_MARGIN,
GL_INSIDE_MARGIN,
GL_WHITESPACE
} glyph_layout;
struct extent
{
struct lrecord_header lheader;
Memind start;
Memind end;
Lisp_Object object; /* A buffer, string, Qnil (extent detached from no
buffer), Qt (destroyed extent) */
/* Extent properties are conceptually a plist, but the most common
props are implemented as bits instead of conses. */
struct
{
Lisp_Object face;
/* These flags are simply an optimization for common boolean properties
which go onto the extent's property list. Any of them would work if
done in the normal way, but the space savings of doing these in this
way is significant. Note that if you add a flag, there are numerous
places in extents.c that need to know about it.
Another consideration is that some of these properties are accessed
during redisplay, so it's good for access to them to be fast (a bit
reference instead of a search down a plist).
`begin_glyph_layout' and `end_glyph_layout' are unusual in that
they have 4 states instead of 2.
Other special extent properties are stored in an auxiliary
structure that sits at the beginning of the plist. The has_aux
flag indicates whether this structure exists. The has_parent
flag is an optimization indicating whether the extent has a parent
(this could also be determined by looking in the aux structure). */
enum_field (glyph_layout) begin_glyph_layout :2;
/* 2 text, margins, or whitespace */
enum_field (glyph_layout) end_glyph_layout :2;
/* 4 text, margins, or whitespace */
unsigned int has_parent :1; /* 5 extent has a parent */
unsigned int has_aux :1; /* 6 extent has an aux. structure */
unsigned int start_open :1; /* 7 insertion behavior at start */
unsigned int end_open :1; /* 8 insertion behavior at end */
unsigned int unique :1; /* 9 there may be only one attached */
unsigned int duplicable :1; /* 10 copied to strings by kill/undo */
unsigned int detachable :1; /* 11 extent detaches if text deleted */
unsigned int internal :1; /* 12 used by map-extents etc. */
unsigned int in_red_event :1; /* 13 An event has been spawned for
initial redisplay.
(not exported to lisp) */
unsigned int unused16 :1; /* 16 unused bits */
/* --- Adding more flags will cause the extent struct to grow by another
word. It's not clear that this would make a difference, however,
because on 32-bit machines things tend to get allocated in chunks
of 4 bytes. */
} flags;
/* The plist may have an auxiliary structure as its first element */
Lisp_Object plist;
};
/* Basic properties of an extent (not affected by the extent's parent) */
#define extent_object(e) ((e)->object)
#define extent_start(e) ((e)->start + 0)
#define extent_end(e) ((e)->end + 0)
#define set_extent_start(e, val) ((void) ((e)->start = (val)))
#define set_extent_end(e, val) ((void) ((e)->end = (val)))
#define extent_endpoint(e, endp) ((endp) ? extent_end (e) : extent_start (e))
#define set_extent_endpoint(e, val, endp) \
((endp) ? set_extent_end (e, val) : set_extent_start (e, val))
#define extent_detached_p(e) (extent_start (e) < 0)
/* Additional information that may be present in an extent. The idea is
that fast access is provided to this information, but since (hopefully)
most extents won't have this set on them, we usually don't need to
have this structure around and thus the size of an extent is smaller. */
typedef struct extent_auxiliary extent_auxiliary;
struct extent_auxiliary
{
struct lcrecord_header header;
Lisp_Object begin_glyph;
Lisp_Object end_glyph;
Lisp_Object parent;
/* We use a weak list here. Originally I didn't do this and
depended on having the extent's finalization method remove
itself from its parent's children list. This runs into
lots and lots of problems though because everything is in
a really really bizarre state when an extent's finalization
method is called (it happens in sweep_extents() by way of
ADDITIONAL_FREE_extent()) and it's extremely difficult to
avoid getting hosed by just-freed objects. */
Lisp_Object children;
Lisp_Object invisible;
Lisp_Object read_only;
Lisp_Object mouse_face;
Lisp_Object initial_redisplay_function;
Lisp_Object before_change_functions, after_change_functions;
int priority;
};
extern struct extent_auxiliary extent_auxiliary_defaults;
DECLARE_LRECORD (extent_auxiliary, struct extent_auxiliary);
#define XEXTENT_AUXILIARY(x) \
XRECORD (x, extent_auxiliary, struct extent_auxiliary)
#define XSETEXTENT_AUXILIARY(x, p) XSETRECORD (x, p, extent_auxiliary)
#define EXTENT_AUXILIARYP(x) RECORDP (x, extent_auxiliary)
#define CHECK_EXTENT_AUXILIARY(x) CHECK_RECORD (x, extent_auxiliary)
#define CONCHECK_EXTENT_AUXILIARY(x) CONCHECK_RECORD (x, extent_auxiliary)
struct extent_info
{
struct lcrecord_header header;
struct extent_list *extents;
struct stack_of_extents *soe;
};
DECLARE_LRECORD (extent_info, struct extent_info);
#define XEXTENT_INFO(x) XRECORD (x, extent_info, struct extent_info)
#define XSETEXTENT_INFO(x, p) XSETRECORD (x, p, extent_info)
#define EXTENT_INFOP(x) RECORDP (x, extent_info)
#define CHECK_EXTENT_INFO(x) CHECK_RECORD (x, extent_info)
#define CONCHECK_EXTENT_INFO(x) CONCHECK_RECORD (x, extent_info)
void flush_cached_extent_info (Lisp_Object extent_info);
/* A "normal" field is one that is stored in the `struct flags' structure
in an extent. an "aux" field is one that is stored in the extent's
auxiliary structure.
The functions below that have `extent_no_chase' in their name operate
on an extent directly (ignoring its parent), and should normally
only be used on extents known not to have a parent. The other
versions chase down any parent links. */
#define extent_no_chase_normal_field(e, field) ((e)->flags.field)
INLINE_HEADER struct extent_auxiliary *extent_aux_or_default (EXTENT e);
INLINE_HEADER struct extent_auxiliary *
extent_aux_or_default (EXTENT e)
{
return e->flags.has_aux ?
XEXTENT_AUXILIARY (XCAR (e->plist)) :
& extent_auxiliary_defaults;
}
#define extent_no_chase_aux_field(e, field) (extent_aux_or_default(e)->field)
#define extent_normal_field(e, field) \
extent_no_chase_normal_field (extent_ancestor (e), field)
#define extent_aux_field(e, field) \
extent_no_chase_aux_field (extent_ancestor (e), field)
#define set_extent_no_chase_aux_field(e, field, value) do { \
EXTENT sencaf_e = (e); \
if (! sencaf_e->flags.has_aux) \
allocate_extent_auxiliary (sencaf_e); \
XEXTENT_AUXILIARY (XCAR (sencaf_e->plist))->field = (value);\
} while (0)
#define set_extent_no_chase_normal_field(e, field, value) \
extent_no_chase_normal_field (e, field) = (value)
#define set_extent_aux_field(e, field, value) \
set_extent_no_chase_aux_field (extent_ancestor (e), field, value)
#define set_extent_normal_field(e, field, value) \
set_extent_ancestor_normal_field (extent_no_chase (e), field, value)
/* The `parent' and `children' fields are not affected by any
parent links. We don't provide any settors for these fields
because they need special handling and it's cleaner just to
do this in the particular functions that need to do this. */
#define extent_parent(e) extent_no_chase_aux_field (e, parent)
#define extent_children(e) extent_no_chase_aux_field (e, children)
#define extent_begin_glyph(e) extent_aux_field (e, begin_glyph)
#define extent_end_glyph(e) extent_aux_field (e, end_glyph)
#define extent_priority(e) extent_aux_field (e, priority)
#define extent_invisible(e) extent_aux_field (e, invisible)
#define extent_read_only(e) extent_aux_field (e, read_only)
#define extent_mouse_face(e) extent_aux_field (e, mouse_face)
#define extent_initial_redisplay_function(e) extent_aux_field (e, initial_redisplay_function)
#define extent_before_change_functions(e) extent_aux_field (e, before_change_functions)
#define extent_after_change_functions(e) extent_aux_field (e, after_change_functions)
#define set_extent_begin_glyph(e, value) \
set_extent_aux_field (e, begin_glyph, value)
#define set_extent_end_glyph(e, value) \
set_extent_aux_field (e, end_glyph, value)
#define set_extent_priority(e, value) \
set_extent_aux_field (e, priority, value)
#define set_extent_invisible_1(e, value) \
set_extent_aux_field (e, invisible, value)
#define set_extent_read_only(e, value) \
set_extent_aux_field (e, read_only, value)
#define set_extent_mouse_face(e, value) \
set_extent_aux_field (e, mouse_face, value)
/* Use Fset_extent_initial_redisplay_function unless you know what you're doing */
#define set_extent_initial_redisplay_function(e, value) \
set_extent_aux_field (e, initial_redisplay_function, value)
#define set_extent_before_change_functions(e, value) \
set_extent_aux_field (e, before_change_functions, value)
#define set_extent_after_change_functions(e, value) \
set_extent_aux_field (e, after_change_functions, value)
#define extent_face(e) extent_normal_field (e, face)
#define extent_begin_glyph_layout(e) extent_normal_field (e, begin_glyph_layout)
#define extent_end_glyph_layout(e) extent_normal_field (e, end_glyph_layout)
#define extent_start_open_p(e) extent_normal_field (e, start_open)
#define extent_end_open_p(e) extent_normal_field (e, end_open)
#define extent_unique_p(e) extent_normal_field (e, unique)
#define extent_duplicable_p(e) extent_normal_field (e, duplicable)
#define extent_detachable_p(e) extent_normal_field (e, detachable)
#define extent_internal_p(e) extent_normal_field (e, internal)
#define extent_in_red_event_p(e) extent_normal_field (e, in_red_event)
INLINE_HEADER Lisp_Object * extent_no_chase_plist_addr (EXTENT e);
INLINE_HEADER Lisp_Object *
extent_no_chase_plist_addr (EXTENT e)
{
return e->flags.has_aux ? &XCDR (e->plist) : &e->plist;
}
#define extent_no_chase_plist(e) (*extent_no_chase_plist_addr (e))
#define extent_plist_addr(e) extent_no_chase_plist_addr (extent_ancestor (e))
#define extent_plist_slot(e) extent_no_chase_plist (extent_ancestor (e))
/* flags for map_extents() and friends */
#define ME_END_CLOSED (1 << 0)
#define ME_START_OPEN (1 << 1)
#define ME_ALL_EXTENTS_CLOSED (1 << 2)
#define ME_ALL_EXTENTS_OPEN (2 << 2)
#define ME_ALL_EXTENTS_CLOSED_OPEN (3 << 2)
#define ME_ALL_EXTENTS_OPEN_CLOSED (4 << 2)
#define ME_ALL_EXTENTS_MASK (7 << 2)
#define ME_START_IN_REGION (1 << 5)
#define ME_END_IN_REGION (2 << 5)
#define ME_START_AND_END_IN_REGION (3 << 5)
#define ME_START_OR_END_IN_REGION (4 << 5)
#define ME_IN_REGION_MASK (7 << 5)
#define ME_NEGATE_IN_REGION (1 << 8)
/* the following flags are internal-only */
#define ME_INCLUDE_INTERNAL (1 << 9)
#define ME_MIGHT_THROW (1 << 10)
#define ME_MIGHT_MODIFY_TEXT (1 << 11)
#define ME_MIGHT_MODIFY_EXTENTS (1 << 12)
#define ME_MIGHT_MOVE_SOE (1 << 13)
#define ME_MIGHT_CALL_ELISP (ME_MIGHT_THROW | ME_MIGHT_MODIFY_TEXT | \
ME_MIGHT_MODIFY_EXTENTS | ME_MIGHT_MOVE_SOE)
#define EXTENT_LIVE_P(e) (!EQ (extent_object (e), Qt))
#define CHECK_LIVE_EXTENT(x) do { \
CHECK_EXTENT (x); \
if (!EXTENT_LIVE_P (XEXTENT (x))) \
dead_wrong_type_argument (Qextent_live_p, (x)); \
} while (0)
#define CONCHECK_LIVE_EXTENT(x) do { \
CONCHECK_EXTENT (x); \
if (!EXTENT_LIVE_P (XEXTENT (x))) \
x = wrong_type_argument (Qextent_live_p, (x)); \
} while (0)
EXFUN (Fdetach_extent, 1);
EXFUN (Fextent_end_position, 1);
EXFUN (Fextent_object, 1);
EXFUN (Fextent_start_position, 1);
EXFUN (Fmake_extent, 3);
EXFUN (Fnext_single_property_change, 4);
EXFUN (Fprevious_single_property_change, 4);
EXFUN (Fset_extent_endpoints, 4);
EXFUN (Fnext_extent_change, 2);
EXFUN (Fprevious_extent_change, 2);
EXFUN (Fset_extent_parent, 2);
EXFUN (Fget_char_property, 4);
extern int inside_undo;
extern int in_modeline_generation;
struct extent_fragment *extent_fragment_new (Lisp_Object buffer_or_string,
struct frame *frm);
face_index extent_fragment_update (struct window *w,
struct extent_fragment *ef,
/* Note this is in Bytinds */
Bytind pos, Lisp_Object last_glyph);
void extent_fragment_delete (struct extent_fragment *ef);
#ifdef emacs /* things other than emacs want the structs */
/* from alloc.c */
struct extent *allocate_extent (void);
/* from extents.c */
EXTENT extent_ancestor_1 (EXTENT e);
/* extent_ancestor() chases all the parent links until there aren't any
more. extent_ancestor_1() does the same thing but it a function;
the following optimizes the most common case. */
INLINE_HEADER EXTENT extent_ancestor (EXTENT e);
INLINE_HEADER EXTENT
extent_ancestor (EXTENT e)
{
return e->flags.has_parent ? extent_ancestor_1 (e) : e;
}
void allocate_extent_auxiliary (EXTENT ext);
void init_buffer_extents (struct buffer *b);
void uninit_buffer_extents (struct buffer *b);
typedef int (*map_extents_fun) (EXTENT extent, void *arg);
void map_extents (Bufpos from, Bufpos to, map_extents_fun fn,
void *arg, Lisp_Object obj, EXTENT after,
unsigned int flags);
/* Note the following five functions are NOT in Bufpos's */
void adjust_extents (Lisp_Object object, Memind from,
Memind to, int amount);
void adjust_extents_for_deletion (Lisp_Object object, Bytind from,
Bytind to, int gapsize,
int numdel, int movegapsize);
void verify_extent_modification (Lisp_Object object, Bytind from,
Bytind to,
Lisp_Object inhibit_read_only_value);
void process_extents_for_insertion (Lisp_Object object,
Bytind opoint, Bytecount length);
void process_extents_for_deletion (Lisp_Object object, Bytind from,
Bytind to, int destroy_them);
void report_extent_modification (Lisp_Object, Bufpos, Bufpos, int);
void set_extent_glyph (EXTENT extent, Lisp_Object glyph, int endp,
glyph_layout layout);
void add_string_extents (Lisp_Object string, struct buffer *buf,
Bytind opoint, Bytecount length);
void splice_in_string_extents (Lisp_Object string, struct buffer *buf,
Bytind opoint, Bytecount length,
Bytecount pos);
void copy_string_extents (Lisp_Object new_string,
Lisp_Object old_string,
Bytecount new_pos, Bytecount old_pos,
Bytecount length);
void detach_all_extents (Lisp_Object object);
void set_extent_endpoints (EXTENT extent, Bytind s, Bytind e,
Lisp_Object object);
#ifdef ERROR_CHECK_EXTENTS
void sledgehammer_extent_check (Lisp_Object obj);
#endif
#ifdef MEMORY_USAGE_STATS
int compute_buffer_extent_usage (struct buffer *b,
struct overhead_stats *ovstats);
#endif
#endif /* emacs */
#endif /* INCLUDED_extents_h_ */
|