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annotate src/extents.c @ 5132:e84ee15ca495 ben-lisp-object
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| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Sun, 07 Mar 2010 06:45:45 -0600 |
| parents | a9c41067dd88 |
| children | f965e31a35f0 |
| rev | line source |
|---|---|
| 428 | 1 /* Copyright (c) 1994, 1995 Free Software Foundation, Inc. |
| 2 Copyright (c) 1995 Sun Microsystems, Inc. | |
|
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3 Copyright (c) 1995, 1996, 2000, 2002, 2003, 2004, 2005, 2010 Ben Wing. |
| 428 | 4 |
| 5 This file is part of XEmacs. | |
| 6 | |
| 7 XEmacs is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 9 Free Software Foundation; either version 2, or (at your option) any | |
| 10 later version. | |
| 11 | |
| 12 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with XEmacs; see the file COPYING. If not, write to | |
| 19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 20 Boston, MA 02111-1307, USA. */ | |
| 21 | |
| 22 /* Synched up with: Not in FSF. */ | |
| 23 | |
| 24 /* This file has been Mule-ized. */ | |
| 25 | |
| 26 /* Written by Ben Wing <ben@xemacs.org>. | |
| 27 | |
| 28 [Originally written by some people at Lucid. | |
| 29 Hacked on by jwz. | |
| 30 Start/end-open stuff added by John Rose (john.rose@eng.sun.com). | |
| 31 Rewritten from scratch by Ben Wing, December 1994.] */ | |
| 32 | |
| 33 /* Commentary: | |
| 34 | |
| 35 Extents are regions over a buffer, with a start and an end position | |
| 36 denoting the region of the buffer included in the extent. In | |
| 37 addition, either end can be closed or open, meaning that the endpoint | |
| 38 is or is not logically included in the extent. Insertion of a character | |
| 39 at a closed endpoint causes the character to go inside the extent; | |
| 40 insertion at an open endpoint causes the character to go outside. | |
| 41 | |
| 42 Extent endpoints are stored using memory indices (see insdel.c), | |
| 43 to minimize the amount of adjusting that needs to be done when | |
| 44 characters are inserted or deleted. | |
| 45 | |
| 46 (Formerly, extent endpoints at the gap could be either before or | |
| 47 after the gap, depending on the open/closedness of the endpoint. | |
| 48 The intent of this was to make it so that insertions would | |
| 49 automatically go inside or out of extents as necessary with no | |
| 50 further work needing to be done. It didn't work out that way, | |
| 51 however, and just ended up complexifying and buggifying all the | |
| 52 rest of the code.) | |
| 53 | |
| 54 Extents are compared using memory indices. There are two orderings | |
| 55 for extents and both orders are kept current at all times. The normal | |
| 56 or "display" order is as follows: | |
| 57 | |
| 58 Extent A is "less than" extent B, that is, earlier in the display order, | |
| 59 if: A-start < B-start, | |
| 60 or if: A-start = B-start, and A-end > B-end | |
| 61 | |
| 62 So if two extents begin at the same position, the larger of them is the | |
| 63 earlier one in the display order (EXTENT_LESS is true). | |
| 64 | |
| 65 For the e-order, the same thing holds: Extent A is "less than" extent B | |
| 66 in e-order, that is, later in the buffer, | |
| 67 if: A-end < B-end, | |
| 68 or if: A-end = B-end, and A-start > B-start | |
| 69 | |
| 70 So if two extents end at the same position, the smaller of them is the | |
| 71 earlier one in the e-order (EXTENT_E_LESS is true). | |
| 72 | |
| 73 The display order and the e-order are complementary orders: any | |
| 74 theorem about the display order also applies to the e-order if you | |
| 75 swap all occurrences of "display order" and "e-order", "less than" | |
| 76 and "greater than", and "extent start" and "extent end". | |
| 77 | |
| 78 Extents can be zero-length, and will end up that way if their endpoints | |
| 79 are explicitly set that way or if their detachable property is nil | |
| 80 and all the text in the extent is deleted. (The exception is open-open | |
| 81 zero-length extents, which are barred from existing because there is | |
| 82 no sensible way to define their properties. Deletion of the text in | |
| 83 an open-open extent causes it to be converted into a closed-open | |
| 84 extent.) Zero-length extents are primarily used to represent | |
| 85 annotations, and behave as follows: | |
| 86 | |
| 87 1) Insertion at the position of a zero-length extent expands the extent | |
| 88 if both endpoints are closed; goes after the extent if it is closed-open; | |
| 89 and goes before the extent if it is open-closed. | |
| 90 | |
| 91 2) Deletion of a character on a side of a zero-length extent whose | |
| 92 corresponding endpoint is closed causes the extent to be detached if | |
| 93 it is detachable; if the extent is not detachable or the corresponding | |
| 94 endpoint is open, the extent remains in the buffer, moving as necessary. | |
| 95 | |
| 96 Note that closed-open, non-detachable zero-length extents behave exactly | |
| 97 like markers and that open-closed, non-detachable zero-length extents | |
| 98 behave like the "point-type" marker in Mule. | |
| 99 | |
| 100 | |
| 101 #### The following information is wrong in places. | |
| 102 | |
| 103 More about the different orders: | |
| 104 -------------------------------- | |
| 105 | |
| 106 The extents in a buffer are ordered by "display order" because that | |
| 107 is that order that the redisplay mechanism needs to process them in. | |
| 108 The e-order is an auxiliary ordering used to facilitate operations | |
| 109 over extents. The operations that can be performed on the ordered | |
| 110 list of extents in a buffer are | |
| 111 | |
| 112 1) Locate where an extent would go if inserted into the list. | |
| 113 2) Insert an extent into the list. | |
| 114 3) Remove an extent from the list. | |
| 115 4) Map over all the extents that overlap a range. | |
| 116 | |
| 117 (4) requires being able to determine the first and last extents | |
| 118 that overlap a range. | |
| 119 | |
| 120 NOTE: "overlap" is used as follows: | |
| 121 | |
| 122 -- two ranges overlap if they have at least one point in common. | |
| 123 Whether the endpoints are open or closed makes a difference here. | |
| 124 -- a point overlaps a range if the point is contained within the | |
| 125 range; this is equivalent to treating a point P as the range | |
| 126 [P, P]. | |
| 127 -- In the case of an *extent* overlapping a point or range, the | |
| 128 extent is normally treated as having closed endpoints. This | |
| 129 applies consistently in the discussion of stacks of extents | |
| 130 and such below. Note that this definition of overlap is not | |
| 131 necessarily consistent with the extents that `map-extents' | |
| 132 maps over, since `map-extents' sometimes pays attention to | |
| 133 whether the endpoints of an extents are open or closed. | |
| 134 But for our purposes, it greatly simplifies things to treat | |
| 135 all extents as having closed endpoints. | |
| 136 | |
| 137 First, define >, <, <=, etc. as applied to extents to mean | |
| 138 comparison according to the display order. Comparison between an | |
| 139 extent E and an index I means comparison between E and the range | |
| 140 [I, I]. | |
| 141 Also define e>, e<, e<=, etc. to mean comparison according to the | |
| 142 e-order. | |
| 143 For any range R, define R(0) to be the starting index of the range | |
| 144 and R(1) to be the ending index of the range. | |
| 145 For any extent E, define E(next) to be the extent directly following | |
| 146 E, and E(prev) to be the extent directly preceding E. Assume | |
| 147 E(next) and E(prev) can be determined from E in constant time. | |
| 148 (This is because we store the extent list as a doubly linked | |
| 149 list.) | |
| 150 Similarly, define E(e-next) and E(e-prev) to be the extents | |
| 151 directly following and preceding E in the e-order. | |
| 152 | |
| 153 Now: | |
| 154 | |
| 155 Let R be a range. | |
| 156 Let F be the first extent overlapping R. | |
| 157 Let L be the last extent overlapping R. | |
| 158 | |
| 159 Theorem 1: R(1) lies between L and L(next), i.e. L <= R(1) < L(next). | |
| 160 | |
| 161 This follows easily from the definition of display order. The | |
| 162 basic reason that this theorem applies is that the display order | |
| 163 sorts by increasing starting index. | |
| 164 | |
| 165 Therefore, we can determine L just by looking at where we would | |
| 166 insert R(1) into the list, and if we know F and are moving forward | |
| 167 over extents, we can easily determine when we've hit L by comparing | |
| 168 the extent we're at to R(1). | |
| 169 | |
| 170 Theorem 2: F(e-prev) e< [1, R(0)] e<= F. | |
| 171 | |
| 172 This is the analog of Theorem 1, and applies because the e-order | |
| 173 sorts by increasing ending index. | |
| 174 | |
| 175 Therefore, F can be found in the same amount of time as operation (1), | |
| 176 i.e. the time that it takes to locate where an extent would go if | |
| 177 inserted into the e-order list. | |
| 178 | |
| 179 If the lists were stored as balanced binary trees, then operation (1) | |
| 180 would take logarithmic time, which is usually quite fast. However, | |
| 181 currently they're stored as simple doubly-linked lists, and instead | |
| 182 we do some caching to try to speed things up. | |
| 183 | |
| 184 Define a "stack of extents" (or "SOE") as the set of extents | |
| 185 (ordered in the display order) that overlap an index I, together with | |
| 186 the SOE's "previous" extent, which is an extent that precedes I in | |
| 187 the e-order. (Hopefully there will not be very many extents between | |
| 188 I and the previous extent.) | |
| 189 | |
| 190 Now: | |
| 191 | |
| 192 Let I be an index, let S be the stack of extents on I, let F be | |
| 193 the first extent in S, and let P be S's previous extent. | |
| 194 | |
| 195 Theorem 3: The first extent in S is the first extent that overlaps | |
| 196 any range [I, J]. | |
| 197 | |
| 198 Proof: Any extent that overlaps [I, J] but does not include I must | |
| 199 have a start index > I, and thus be greater than any extent in S. | |
| 200 | |
| 201 Therefore, finding the first extent that overlaps a range R is the | |
| 202 same as finding the first extent that overlaps R(0). | |
| 203 | |
| 204 Theorem 4: Let I2 be an index such that I2 > I, and let F2 be the | |
| 205 first extent that overlaps I2. Then, either F2 is in S or F2 is | |
| 206 greater than any extent in S. | |
| 207 | |
| 208 Proof: If F2 does not include I then its start index is greater | |
| 209 than I and thus it is greater than any extent in S, including F. | |
| 210 Otherwise, F2 includes I and thus is in S, and thus F2 >= F. | |
| 211 | |
| 212 */ | |
| 213 | |
| 214 #include <config.h> | |
| 215 #include "lisp.h" | |
| 216 | |
| 217 #include "buffer.h" | |
| 218 #include "debug.h" | |
| 219 #include "device.h" | |
| 220 #include "elhash.h" | |
| 872 | 221 #include "extents-impl.h" |
| 428 | 222 #include "faces.h" |
| 223 #include "frame.h" | |
| 224 #include "glyphs.h" | |
| 225 #include "insdel.h" | |
| 226 #include "keymap.h" | |
| 227 #include "opaque.h" | |
| 228 #include "process.h" | |
| 1292 | 229 #include "profile.h" |
| 428 | 230 #include "redisplay.h" |
| 442 | 231 #include "gutter.h" |
| 428 | 232 |
| 233 /* ------------------------------- */ | |
| 234 /* gap array */ | |
| 235 /* ------------------------------- */ | |
| 236 | |
| 237 /* Note that this object is not extent-specific and should perhaps be | |
| 238 moved into another file. */ | |
| 239 | |
| 240 /* Holds a marker that moves as elements in the array are inserted and | |
| 241 deleted, similar to standard markers. */ | |
| 242 | |
| 243 typedef struct gap_array_marker | |
| 244 { | |
| 3092 | 245 #ifdef NEW_GC |
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246 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 247 #endif /* NEW_GC */ |
| 428 | 248 int pos; |
| 249 struct gap_array_marker *next; | |
| 250 } Gap_Array_Marker; | |
| 251 | |
| 1204 | 252 |
| 428 | 253 /* Holds a "gap array", which is an array of elements with a gap located |
| 254 in it. Insertions and deletions with a high degree of locality | |
| 255 are very fast, essentially in constant time. Array positions as | |
| 256 used and returned in the gap array functions are independent of | |
| 257 the gap. */ | |
| 258 | |
| 1204 | 259 /* Layout of gap array: |
| 260 | |
| 261 <------ gap ------><---- gapsize ----><----- numels - gap ----> | |
| 262 <---------------------- numels + gapsize ---------------------> | |
| 263 | |
| 264 For marking purposes, we use two extra variables computed from | |
| 265 the others -- the offset to the data past the gap, plus the number | |
| 266 of elements in that data: | |
| 267 | |
| 268 offset_past_gap = elsize * (gap + gapsize) | |
| 269 els_past_gap = numels - gap | |
| 270 */ | |
| 271 | |
| 272 | |
| 428 | 273 typedef struct gap_array |
| 274 { | |
| 3092 | 275 #ifdef NEW_GC |
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276 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 277 #endif /* NEW_GC */ |
| 1204 | 278 Elemcount gap; |
| 279 Elemcount gapsize; | |
| 280 Elemcount numels; | |
| 281 Bytecount elsize; | |
| 282 /* Redundant numbers computed from the others, for marking purposes */ | |
| 283 Bytecount offset_past_gap; | |
| 284 Elemcount els_past_gap; | |
| 428 | 285 Gap_Array_Marker *markers; |
| 1204 | 286 /* this is a stretchy array */ |
| 287 char array[1]; | |
| 428 | 288 } Gap_Array; |
| 289 | |
| 3092 | 290 #ifndef NEW_GC |
| 428 | 291 static Gap_Array_Marker *gap_array_marker_freelist; |
| 3092 | 292 #endif /* not NEW_GC */ |
| 428 | 293 |
| 294 /* Convert a "memory position" (i.e. taking the gap into account) into | |
| 295 the address of the element at (i.e. after) that position. "Memory | |
| 826 | 296 positions" are only used internally and are of type Memxpos. |
| 428 | 297 "Array positions" are used externally and are of type int. */ |
| 298 #define GAP_ARRAY_MEMEL_ADDR(ga, memel) ((ga)->array + (ga)->elsize*(memel)) | |
| 299 | |
| 300 /* Number of elements currently in a gap array */ | |
| 301 #define GAP_ARRAY_NUM_ELS(ga) ((ga)->numels) | |
| 302 | |
| 303 #define GAP_ARRAY_ARRAY_TO_MEMORY_POS(ga, pos) \ | |
| 304 ((pos) <= (ga)->gap ? (pos) : (pos) + (ga)->gapsize) | |
| 305 | |
| 306 #define GAP_ARRAY_MEMORY_TO_ARRAY_POS(ga, pos) \ | |
| 307 ((pos) <= (ga)->gap ? (pos) : (pos) - (ga)->gapsize) | |
| 308 | |
| 309 /* Convert an array position into the address of the element at | |
| 310 (i.e. after) that position. */ | |
| 311 #define GAP_ARRAY_EL_ADDR(ga, pos) ((pos) < (ga)->gap ? \ | |
| 312 GAP_ARRAY_MEMEL_ADDR(ga, pos) : \ | |
| 313 GAP_ARRAY_MEMEL_ADDR(ga, (pos) + (ga)->gapsize)) | |
| 314 | |
| 315 /* ------------------------------- */ | |
| 316 /* extent list */ | |
| 317 /* ------------------------------- */ | |
| 318 | |
| 319 typedef struct extent_list_marker | |
| 320 { | |
| 3092 | 321 #ifdef NEW_GC |
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322 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 323 #endif /* NEW_GC */ |
| 428 | 324 Gap_Array_Marker *m; |
| 325 int endp; | |
| 326 struct extent_list_marker *next; | |
| 327 } Extent_List_Marker; | |
| 328 | |
| 329 typedef struct extent_list | |
| 330 { | |
| 3092 | 331 #ifdef NEW_GC |
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332 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 333 #endif /* NEW_GC */ |
| 428 | 334 Gap_Array *start; |
| 335 Gap_Array *end; | |
| 336 Extent_List_Marker *markers; | |
| 337 } Extent_List; | |
| 338 | |
| 3092 | 339 #ifndef NEW_GC |
| 428 | 340 static Extent_List_Marker *extent_list_marker_freelist; |
| 3092 | 341 #endif /* not NEW_GC */ |
| 428 | 342 |
| 343 #define EXTENT_LESS_VALS(e,st,nd) ((extent_start (e) < (st)) || \ | |
| 344 ((extent_start (e) == (st)) && \ | |
| 345 (extent_end (e) > (nd)))) | |
| 346 | |
| 347 #define EXTENT_EQUAL_VALS(e,st,nd) ((extent_start (e) == (st)) && \ | |
| 348 (extent_end (e) == (nd))) | |
| 349 | |
| 350 #define EXTENT_LESS_EQUAL_VALS(e,st,nd) ((extent_start (e) < (st)) || \ | |
| 351 ((extent_start (e) == (st)) && \ | |
| 352 (extent_end (e) >= (nd)))) | |
| 353 | |
| 354 /* Is extent E1 less than extent E2 in the display order? */ | |
| 355 #define EXTENT_LESS(e1,e2) \ | |
| 356 EXTENT_LESS_VALS (e1, extent_start (e2), extent_end (e2)) | |
| 357 | |
| 358 /* Is extent E1 equal to extent E2? */ | |
| 359 #define EXTENT_EQUAL(e1,e2) \ | |
| 360 EXTENT_EQUAL_VALS (e1, extent_start (e2), extent_end (e2)) | |
| 361 | |
| 362 /* Is extent E1 less than or equal to extent E2 in the display order? */ | |
| 363 #define EXTENT_LESS_EQUAL(e1,e2) \ | |
| 364 EXTENT_LESS_EQUAL_VALS (e1, extent_start (e2), extent_end (e2)) | |
| 365 | |
| 366 #define EXTENT_E_LESS_VALS(e,st,nd) ((extent_end (e) < (nd)) || \ | |
| 367 ((extent_end (e) == (nd)) && \ | |
| 368 (extent_start (e) > (st)))) | |
| 369 | |
| 370 #define EXTENT_E_LESS_EQUAL_VALS(e,st,nd) ((extent_end (e) < (nd)) || \ | |
| 371 ((extent_end (e) == (nd)) && \ | |
| 372 (extent_start (e) >= (st)))) | |
| 373 | |
| 374 /* Is extent E1 less than extent E2 in the e-order? */ | |
| 375 #define EXTENT_E_LESS(e1,e2) \ | |
| 376 EXTENT_E_LESS_VALS(e1, extent_start (e2), extent_end (e2)) | |
| 377 | |
| 378 /* Is extent E1 less than or equal to extent E2 in the e-order? */ | |
| 379 #define EXTENT_E_LESS_EQUAL(e1,e2) \ | |
| 380 EXTENT_E_LESS_EQUAL_VALS (e1, extent_start (e2), extent_end (e2)) | |
| 381 | |
| 382 #define EXTENT_GAP_ARRAY_AT(ga, pos) (* (EXTENT *) GAP_ARRAY_EL_ADDR(ga, pos)) | |
| 383 | |
| 384 /* ------------------------------- */ | |
| 385 /* buffer-extent primitives */ | |
| 386 /* ------------------------------- */ | |
| 387 | |
| 388 typedef struct stack_of_extents | |
| 389 { | |
| 3092 | 390 #ifdef NEW_GC |
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391 NORMAL_LISP_OBJECT_HEADER header; |
| 3092 | 392 #endif /* NEW_GC */ |
| 428 | 393 Extent_List *extents; |
| 826 | 394 Memxpos pos; /* Position of stack of extents. EXTENTS is the list of |
| 428 | 395 all extents that overlap this position. This position |
| 396 can be -1 if the stack of extents is invalid (this | |
| 397 happens when a buffer is first created or a string's | |
| 398 stack of extents is created [a string's stack of extents | |
| 399 is nuked when a GC occurs, to conserve memory]). */ | |
| 400 } Stack_Of_Extents; | |
| 401 | |
| 402 /* ------------------------------- */ | |
| 403 /* map-extents */ | |
| 404 /* ------------------------------- */ | |
| 405 | |
| 826 | 406 typedef int (*map_extents_fun) (EXTENT extent, void *arg); |
| 407 | |
| 428 | 408 typedef int Endpoint_Index; |
| 409 | |
| 826 | 410 #define memxpos_to_startind(x, start_open) \ |
| 428 | 411 ((Endpoint_Index) (((x) << 1) + !!(start_open))) |
| 826 | 412 #define memxpos_to_endind(x, end_open) \ |
| 428 | 413 ((Endpoint_Index) (((x) << 1) - !!(end_open))) |
| 414 | |
| 415 /* ------------------------------- */ | |
| 416 /* buffer-or-string primitives */ | |
| 417 /* ------------------------------- */ | |
| 418 | |
| 826 | 419 /* Similar for Bytebpos's and start/end indices. */ |
| 420 | |
| 421 #define buffer_or_string_bytexpos_to_startind(obj, ind, start_open) \ | |
| 422 memxpos_to_startind (buffer_or_string_bytexpos_to_memxpos (obj, ind), \ | |
| 428 | 423 start_open) |
| 424 | |
| 826 | 425 #define buffer_or_string_bytexpos_to_endind(obj, ind, end_open) \ |
| 426 memxpos_to_endind (buffer_or_string_bytexpos_to_memxpos (obj, ind), \ | |
| 428 | 427 end_open) |
| 428 | |
| 429 /* ------------------------------- */ | |
| 430 /* Lisp-level functions */ | |
| 431 /* ------------------------------- */ | |
| 432 | |
| 433 /* flags for decode_extent() */ | |
| 434 #define DE_MUST_HAVE_BUFFER 1 | |
| 435 #define DE_MUST_BE_ATTACHED 2 | |
| 436 | |
| 437 Lisp_Object Vlast_highlighted_extent; | |
| 1292 | 438 |
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439 Lisp_Object Vextent_auxiliary_defaults; |
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440 |
| 1292 | 441 Lisp_Object QSin_map_extents_internal; |
| 442 | |
| 458 | 443 Fixnum mouse_highlight_priority; |
| 428 | 444 |
| 445 Lisp_Object Qextentp; | |
| 446 Lisp_Object Qextent_live_p; | |
| 447 | |
| 448 Lisp_Object Qall_extents_closed; | |
| 449 Lisp_Object Qall_extents_open; | |
| 450 Lisp_Object Qall_extents_closed_open; | |
| 451 Lisp_Object Qall_extents_open_closed; | |
| 452 Lisp_Object Qstart_in_region; | |
| 453 Lisp_Object Qend_in_region; | |
| 454 Lisp_Object Qstart_and_end_in_region; | |
| 455 Lisp_Object Qstart_or_end_in_region; | |
| 456 Lisp_Object Qnegate_in_region; | |
| 457 | |
| 458 Lisp_Object Qdetached; | |
| 459 Lisp_Object Qdestroyed; | |
| 460 Lisp_Object Qbegin_glyph; | |
| 461 Lisp_Object Qend_glyph; | |
| 462 Lisp_Object Qstart_open; | |
| 463 Lisp_Object Qend_open; | |
| 464 Lisp_Object Qstart_closed; | |
| 465 Lisp_Object Qend_closed; | |
| 466 Lisp_Object Qread_only; | |
| 467 /* Qhighlight defined in general.c */ | |
| 468 Lisp_Object Qunique; | |
| 469 Lisp_Object Qduplicable; | |
| 470 Lisp_Object Qdetachable; | |
| 471 Lisp_Object Qpriority; | |
| 472 Lisp_Object Qmouse_face; | |
| 473 Lisp_Object Qinitial_redisplay_function; | |
| 474 | |
| 475 Lisp_Object Qglyph_layout; /* This exists only for backwards compatibility. */ | |
| 476 Lisp_Object Qbegin_glyph_layout, Qend_glyph_layout; | |
| 477 Lisp_Object Qoutside_margin; | |
| 478 Lisp_Object Qinside_margin; | |
| 479 Lisp_Object Qwhitespace; | |
| 480 /* Qtext defined in general.c */ | |
| 481 | |
| 482 Lisp_Object Qcopy_function; | |
| 483 Lisp_Object Qpaste_function; | |
| 484 | |
| 485 static Lisp_Object canonicalize_extent_property (Lisp_Object prop, | |
| 486 Lisp_Object value); | |
| 826 | 487 |
| 488 typedef struct | |
| 489 { | |
| 490 Lisp_Object key, value; | |
| 491 } Lisp_Object_pair; | |
| 492 typedef struct | |
| 493 { | |
| 494 Dynarr_declare (Lisp_Object_pair); | |
| 495 } Lisp_Object_pair_dynarr; | |
| 496 | |
| 497 static void extent_properties (EXTENT e, Lisp_Object_pair_dynarr *props); | |
| 498 | |
| 428 | 499 Lisp_Object Vextent_face_memoize_hash_table; |
| 500 Lisp_Object Vextent_face_reverse_memoize_hash_table; | |
| 501 Lisp_Object Vextent_face_reusable_list; | |
| 502 /* FSFmacs bogosity */ | |
| 503 Lisp_Object Vdefault_text_properties; | |
| 504 | |
| 442 | 505 /* if true, we don't want to set any redisplay flags on modeline extent |
| 506 changes */ | |
| 507 int in_modeline_generation; | |
| 508 | |
| 428 | 509 |
| 510 /************************************************************************/ | |
| 511 /* Generalized gap array */ | |
| 512 /************************************************************************/ | |
| 513 | |
| 514 /* This generalizes the "array with a gap" model used to store buffer | |
| 515 characters. This is based on the stuff in insdel.c and should | |
| 516 probably be merged with it. This is not extent-specific and should | |
| 517 perhaps be moved into a separate file. */ | |
| 518 | |
| 519 /* ------------------------------- */ | |
| 520 /* internal functions */ | |
| 521 /* ------------------------------- */ | |
| 522 | |
| 523 /* Adjust the gap array markers in the range (FROM, TO]. Parallel to | |
| 524 adjust_markers() in insdel.c. */ | |
| 525 | |
| 526 static void | |
| 826 | 527 gap_array_adjust_markers (Gap_Array *ga, Memxpos from, |
| 1204 | 528 Memxpos to, Elemcount amount) |
| 428 | 529 { |
| 530 Gap_Array_Marker *m; | |
| 531 | |
| 532 for (m = ga->markers; m; m = m->next) | |
| 533 m->pos = do_marker_adjustment (m->pos, from, to, amount); | |
| 534 } | |
| 535 | |
| 1204 | 536 static void |
| 537 gap_array_recompute_derived_values (Gap_Array *ga) | |
| 538 { | |
| 539 ga->offset_past_gap = ga->elsize * (ga->gap + ga->gapsize); | |
| 540 ga->els_past_gap = ga->numels - ga->gap; | |
| 541 } | |
| 542 | |
| 428 | 543 /* Move the gap to array position POS. Parallel to move_gap() in |
| 544 insdel.c but somewhat simplified. */ | |
| 545 | |
| 546 static void | |
| 1204 | 547 gap_array_move_gap (Gap_Array *ga, Elemcount pos) |
| 548 { | |
| 549 Elemcount gap = ga->gap; | |
| 550 Elemcount gapsize = ga->gapsize; | |
| 551 | |
| 428 | 552 if (pos < gap) |
| 553 { | |
| 554 memmove (GAP_ARRAY_MEMEL_ADDR (ga, pos + gapsize), | |
| 555 GAP_ARRAY_MEMEL_ADDR (ga, pos), | |
| 556 (gap - pos)*ga->elsize); | |
| 826 | 557 gap_array_adjust_markers (ga, (Memxpos) pos, (Memxpos) gap, |
| 428 | 558 gapsize); |
| 559 } | |
| 560 else if (pos > gap) | |
| 561 { | |
| 562 memmove (GAP_ARRAY_MEMEL_ADDR (ga, gap), | |
| 563 GAP_ARRAY_MEMEL_ADDR (ga, gap + gapsize), | |
| 564 (pos - gap)*ga->elsize); | |
| 826 | 565 gap_array_adjust_markers (ga, (Memxpos) (gap + gapsize), |
| 566 (Memxpos) (pos + gapsize), - gapsize); | |
| 428 | 567 } |
| 568 ga->gap = pos; | |
| 1204 | 569 |
| 570 gap_array_recompute_derived_values (ga); | |
| 428 | 571 } |
| 572 | |
| 573 /* Make the gap INCREMENT characters longer. Parallel to make_gap() in | |
| 1204 | 574 insdel.c. The gap array may be moved, so assign the return value back |
| 575 to the array pointer. */ | |
| 576 | |
| 577 static Gap_Array * | |
| 578 gap_array_make_gap (Gap_Array *ga, Elemcount increment) | |
| 579 { | |
| 580 Elemcount real_gap_loc; | |
| 581 Elemcount old_gap_size; | |
| 428 | 582 |
| 583 /* If we have to get more space, get enough to last a while. We use | |
| 584 a geometric progression that saves on realloc space. */ | |
| 585 increment += 100 + ga->numels / 8; | |
| 586 | |
| 3092 | 587 #ifdef NEW_GC |
| 588 ga = (Gap_Array *) mc_realloc (ga, | |
| 589 offsetof (Gap_Array, array) + | |
| 590 (ga->numels + ga->gapsize + increment) * | |
| 591 ga->elsize); | |
| 592 #else /* not NEW_GC */ | |
| 1204 | 593 ga = (Gap_Array *) xrealloc (ga, |
| 594 offsetof (Gap_Array, array) + | |
| 595 (ga->numels + ga->gapsize + increment) * | |
| 596 ga->elsize); | |
| 3092 | 597 #endif /* not NEW_GC */ |
| 1204 | 598 if (ga == 0) |
| 428 | 599 memory_full (); |
| 600 | |
| 601 real_gap_loc = ga->gap; | |
| 602 old_gap_size = ga->gapsize; | |
| 603 | |
| 604 /* Call the newly allocated space a gap at the end of the whole space. */ | |
| 605 ga->gap = ga->numels + ga->gapsize; | |
| 606 ga->gapsize = increment; | |
| 607 | |
| 608 /* Move the new gap down to be consecutive with the end of the old one. | |
| 609 This adjusts the markers properly too. */ | |
| 610 gap_array_move_gap (ga, real_gap_loc + old_gap_size); | |
| 611 | |
| 612 /* Now combine the two into one large gap. */ | |
| 613 ga->gapsize += old_gap_size; | |
| 614 ga->gap = real_gap_loc; | |
| 1204 | 615 |
| 616 gap_array_recompute_derived_values (ga); | |
| 617 | |
| 618 return ga; | |
| 428 | 619 } |
| 620 | |
| 621 /* ------------------------------- */ | |
| 622 /* external functions */ | |
| 623 /* ------------------------------- */ | |
| 624 | |
| 625 /* Insert NUMELS elements (pointed to by ELPTR) into the specified | |
| 1204 | 626 gap array at POS. The gap array may be moved, so assign the |
| 627 return value back to the array pointer. */ | |
| 628 | |
| 629 static Gap_Array * | |
| 630 gap_array_insert_els (Gap_Array *ga, Elemcount pos, void *elptr, | |
| 631 Elemcount numels) | |
| 428 | 632 { |
| 633 assert (pos >= 0 && pos <= ga->numels); | |
| 634 if (ga->gapsize < numels) | |
| 1204 | 635 ga = gap_array_make_gap (ga, numels - ga->gapsize); |
| 428 | 636 if (pos != ga->gap) |
| 637 gap_array_move_gap (ga, pos); | |
| 638 | |
| 639 memcpy (GAP_ARRAY_MEMEL_ADDR (ga, ga->gap), (char *) elptr, | |
| 640 numels*ga->elsize); | |
| 641 ga->gapsize -= numels; | |
| 642 ga->gap += numels; | |
| 643 ga->numels += numels; | |
| 1204 | 644 gap_array_recompute_derived_values (ga); |
| 428 | 645 /* This is the equivalent of insert-before-markers. |
| 646 | |
| 647 #### Should only happen if marker is "moves forward at insert" type. | |
| 648 */ | |
| 649 | |
| 650 gap_array_adjust_markers (ga, pos - 1, pos, numels); | |
| 1204 | 651 return ga; |
| 428 | 652 } |
| 653 | |
| 654 /* Delete NUMELS elements from the specified gap array, starting at FROM. */ | |
| 655 | |
| 656 static void | |
| 1204 | 657 gap_array_delete_els (Gap_Array *ga, Elemcount from, Elemcount numdel) |
| 658 { | |
| 659 Elemcount to = from + numdel; | |
| 660 Elemcount gapsize = ga->gapsize; | |
| 428 | 661 |
| 662 assert (from >= 0); | |
| 663 assert (numdel >= 0); | |
| 664 assert (to <= ga->numels); | |
| 665 | |
| 666 /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
| 667 if (to < ga->gap) | |
| 668 gap_array_move_gap (ga, to); | |
| 669 if (from > ga->gap) | |
| 670 gap_array_move_gap (ga, from); | |
| 671 | |
| 672 /* Relocate all markers pointing into the new, larger gap | |
| 673 to point at the end of the text before the gap. */ | |
| 674 gap_array_adjust_markers (ga, to + gapsize, to + gapsize, | |
| 675 - numdel - gapsize); | |
| 676 | |
| 677 ga->gapsize += numdel; | |
| 678 ga->numels -= numdel; | |
| 679 ga->gap = from; | |
| 1204 | 680 gap_array_recompute_derived_values (ga); |
| 428 | 681 } |
| 682 | |
| 683 static Gap_Array_Marker * | |
| 1204 | 684 gap_array_make_marker (Gap_Array *ga, Elemcount pos) |
| 428 | 685 { |
| 686 Gap_Array_Marker *m; | |
| 687 | |
| 688 assert (pos >= 0 && pos <= ga->numels); | |
| 3092 | 689 #ifdef NEW_GC |
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690 m = XGAP_ARRAY_MARKER (ALLOC_NORMAL_LISP_OBJECT (gap_array_marker)); |
| 3092 | 691 #else /* not NEW_GC */ |
| 428 | 692 if (gap_array_marker_freelist) |
| 693 { | |
| 694 m = gap_array_marker_freelist; | |
| 695 gap_array_marker_freelist = gap_array_marker_freelist->next; | |
| 696 } | |
| 697 else | |
| 698 m = xnew (Gap_Array_Marker); | |
| 3092 | 699 #endif /* not NEW_GC */ |
| 428 | 700 |
| 701 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos); | |
| 702 m->next = ga->markers; | |
| 703 ga->markers = m; | |
| 704 return m; | |
| 705 } | |
| 706 | |
| 707 static void | |
| 708 gap_array_delete_marker (Gap_Array *ga, Gap_Array_Marker *m) | |
| 709 { | |
| 710 Gap_Array_Marker *p, *prev; | |
| 711 | |
| 712 for (prev = 0, p = ga->markers; p && p != m; prev = p, p = p->next) | |
| 713 ; | |
| 714 assert (p); | |
| 715 if (prev) | |
| 716 prev->next = p->next; | |
| 717 else | |
| 718 ga->markers = p->next; | |
| 4117 | 719 #ifndef NEW_GC |
| 428 | 720 m->next = gap_array_marker_freelist; |
| 1204 | 721 m->pos = 0xDEADBEEF; /* -559038737 base 10 */ |
| 428 | 722 gap_array_marker_freelist = m; |
| 3092 | 723 #endif /* not NEW_GC */ |
| 724 } | |
| 725 | |
| 726 #ifndef NEW_GC | |
| 428 | 727 static void |
| 728 gap_array_delete_all_markers (Gap_Array *ga) | |
| 729 { | |
| 730 Gap_Array_Marker *p, *next; | |
| 731 | |
| 732 for (p = ga->markers; p; p = next) | |
| 733 { | |
| 734 next = p->next; | |
| 735 p->next = gap_array_marker_freelist; | |
| 736 p->pos = 0xDEADBEEF; /* -559038737 as an int */ | |
| 737 gap_array_marker_freelist = p; | |
| 738 } | |
| 739 } | |
| 3092 | 740 #endif /* not NEW_GC */ |
| 428 | 741 |
| 742 static void | |
| 1204 | 743 gap_array_move_marker (Gap_Array *ga, Gap_Array_Marker *m, Elemcount pos) |
| 428 | 744 { |
| 745 assert (pos >= 0 && pos <= ga->numels); | |
| 746 m->pos = GAP_ARRAY_ARRAY_TO_MEMORY_POS (ga, pos); | |
| 747 } | |
| 748 | |
| 749 #define gap_array_marker_pos(ga, m) \ | |
| 750 GAP_ARRAY_MEMORY_TO_ARRAY_POS (ga, (m)->pos) | |
| 751 | |
| 752 static Gap_Array * | |
| 1204 | 753 make_gap_array (Elemcount elsize) |
| 428 | 754 { |
| 3092 | 755 #ifdef NEW_GC |
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756 Gap_Array *ga = XGAP_ARRAY (ALLOC_SIZED_LISP_OBJECT (sizeof (Gap_Array), |
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757 gap_array)); |
| 3092 | 758 #else /* not NEW_GC */ |
| 428 | 759 Gap_Array *ga = xnew_and_zero (Gap_Array); |
| 3092 | 760 #endif /* not NEW_GC */ |
| 428 | 761 ga->elsize = elsize; |
| 762 return ga; | |
| 763 } | |
| 764 | |
| 3092 | 765 #ifndef NEW_GC |
| 428 | 766 static void |
| 767 free_gap_array (Gap_Array *ga) | |
| 768 { | |
| 769 gap_array_delete_all_markers (ga); | |
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770 xfree (ga); |
| 428 | 771 } |
| 3092 | 772 #endif /* not NEW_GC */ |
| 428 | 773 |
| 774 | |
| 775 /************************************************************************/ | |
| 776 /* Extent list primitives */ | |
| 777 /************************************************************************/ | |
| 778 | |
| 779 /* A list of extents is maintained as a double gap array: one gap array | |
| 780 is ordered by start index (the "display order") and the other is | |
| 781 ordered by end index (the "e-order"). Note that positions in an | |
| 782 extent list should logically be conceived of as referring *to* | |
| 783 a particular extent (as is the norm in programs) rather than | |
| 784 sitting between two extents. Note also that callers of these | |
| 785 functions should not be aware of the fact that the extent list is | |
| 786 implemented as an array, except for the fact that positions are | |
| 787 integers (this should be generalized to handle integers and linked | |
| 788 list equally well). | |
| 789 */ | |
| 790 | |
| 791 /* Number of elements in an extent list */ | |
| 1204 | 792 #define extent_list_num_els(el) GAP_ARRAY_NUM_ELS (el->start) |
| 428 | 793 |
| 794 /* Return the position at which EXTENT is located in the specified extent | |
| 795 list (in the display order if ENDP is 0, in the e-order otherwise). | |
| 796 If the extent is not found, the position where the extent would | |
| 797 be inserted is returned. If ENDP is 0, the insertion would go after | |
| 798 all other equal extents. If ENDP is not 0, the insertion would go | |
| 799 before all other equal extents. If FOUNDP is not 0, then whether | |
| 800 the extent was found will get written into it. */ | |
| 801 | |
| 802 static int | |
| 803 extent_list_locate (Extent_List *el, EXTENT extent, int endp, int *foundp) | |
| 804 { | |
| 805 Gap_Array *ga = endp ? el->end : el->start; | |
| 806 int left = 0, right = GAP_ARRAY_NUM_ELS (ga); | |
| 807 int oldfoundpos, foundpos; | |
| 808 int found; | |
| 809 | |
| 810 while (left != right) | |
| 811 { | |
| 812 /* RIGHT might not point to a valid extent (i.e. it's at the end | |
| 813 of the list), so NEWPOS must round down. */ | |
| 647 | 814 int newpos = (left + right) >> 1; |
| 428 | 815 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, (int) newpos); |
| 816 | |
| 817 if (endp ? EXTENT_E_LESS (e, extent) : EXTENT_LESS (e, extent)) | |
| 647 | 818 left = newpos + 1; |
| 428 | 819 else |
| 820 right = newpos; | |
| 821 } | |
| 822 | |
| 823 /* Now we're at the beginning of all equal extents. */ | |
| 824 found = 0; | |
| 825 oldfoundpos = foundpos = left; | |
| 826 while (foundpos < GAP_ARRAY_NUM_ELS (ga)) | |
| 827 { | |
| 828 EXTENT e = EXTENT_GAP_ARRAY_AT (ga, foundpos); | |
| 829 if (e == extent) | |
| 830 { | |
| 831 found = 1; | |
| 832 break; | |
| 833 } | |
| 834 if (!EXTENT_EQUAL (e, extent)) | |
| 835 break; | |
| 836 foundpos++; | |
| 837 } | |
| 838 if (foundp) | |
| 839 *foundp = found; | |
| 840 if (found || !endp) | |
| 841 return foundpos; | |
| 842 else | |
| 843 return oldfoundpos; | |
| 844 } | |
| 845 | |
| 846 /* Return the position of the first extent that begins at or after POS | |
| 847 (or ends at or after POS, if ENDP is not 0). | |
| 848 | |
| 849 An out-of-range value for POS is allowed, and guarantees that the | |
| 850 position at the beginning or end of the extent list is returned. */ | |
| 851 | |
| 852 static int | |
| 826 | 853 extent_list_locate_from_pos (Extent_List *el, Memxpos pos, int endp) |
| 428 | 854 { |
| 855 struct extent fake_extent; | |
| 856 /* | |
| 857 | |
| 858 Note that if we search for [POS, POS], then we get the following: | |
| 859 | |
| 860 -- if ENDP is 0, then all extents whose start position is <= POS | |
| 861 lie before the returned position, and all extents whose start | |
| 862 position is > POS lie at or after the returned position. | |
| 863 | |
| 864 -- if ENDP is not 0, then all extents whose end position is < POS | |
| 865 lie before the returned position, and all extents whose end | |
| 866 position is >= POS lie at or after the returned position. | |
| 867 | |
| 868 */ | |
| 869 set_extent_start (&fake_extent, endp ? pos : pos-1); | |
| 870 set_extent_end (&fake_extent, endp ? pos : pos-1); | |
| 871 return extent_list_locate (el, &fake_extent, endp, 0); | |
| 872 } | |
| 873 | |
| 874 /* Return the extent at POS. */ | |
| 875 | |
| 876 static EXTENT | |
| 826 | 877 extent_list_at (Extent_List *el, Memxpos pos, int endp) |
| 428 | 878 { |
| 879 Gap_Array *ga = endp ? el->end : el->start; | |
| 880 | |
| 881 assert (pos >= 0 && pos < GAP_ARRAY_NUM_ELS (ga)); | |
| 882 return EXTENT_GAP_ARRAY_AT (ga, pos); | |
| 883 } | |
| 884 | |
| 885 /* Insert an extent into an extent list. */ | |
| 886 | |
| 887 static void | |
| 888 extent_list_insert (Extent_List *el, EXTENT extent) | |
| 889 { | |
| 890 int pos, foundp; | |
| 891 | |
| 892 pos = extent_list_locate (el, extent, 0, &foundp); | |
| 893 assert (!foundp); | |
| 1204 | 894 el->start = gap_array_insert_els (el->start, pos, &extent, 1); |
| 428 | 895 pos = extent_list_locate (el, extent, 1, &foundp); |
| 896 assert (!foundp); | |
| 1204 | 897 el->end = gap_array_insert_els (el->end, pos, &extent, 1); |
| 428 | 898 } |
| 899 | |
| 900 /* Delete an extent from an extent list. */ | |
| 901 | |
| 902 static void | |
| 903 extent_list_delete (Extent_List *el, EXTENT extent) | |
| 904 { | |
| 905 int pos, foundp; | |
| 906 | |
| 907 pos = extent_list_locate (el, extent, 0, &foundp); | |
| 908 assert (foundp); | |
| 909 gap_array_delete_els (el->start, pos, 1); | |
| 910 pos = extent_list_locate (el, extent, 1, &foundp); | |
| 911 assert (foundp); | |
| 912 gap_array_delete_els (el->end, pos, 1); | |
| 913 } | |
| 914 | |
| 915 static void | |
| 916 extent_list_delete_all (Extent_List *el) | |
| 917 { | |
| 918 gap_array_delete_els (el->start, 0, GAP_ARRAY_NUM_ELS (el->start)); | |
| 919 gap_array_delete_els (el->end, 0, GAP_ARRAY_NUM_ELS (el->end)); | |
| 920 } | |
| 921 | |
| 922 static Extent_List_Marker * | |
| 923 extent_list_make_marker (Extent_List *el, int pos, int endp) | |
| 924 { | |
| 925 Extent_List_Marker *m; | |
| 926 | |
| 3092 | 927 #ifdef NEW_GC |
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928 m = XEXTENT_LIST_MARKER (ALLOC_NORMAL_LISP_OBJECT (extent_list_marker)); |
| 3092 | 929 #else /* not NEW_GC */ |
| 428 | 930 if (extent_list_marker_freelist) |
| 931 { | |
| 932 m = extent_list_marker_freelist; | |
| 933 extent_list_marker_freelist = extent_list_marker_freelist->next; | |
| 934 } | |
| 935 else | |
| 936 m = xnew (Extent_List_Marker); | |
| 3092 | 937 #endif /* not NEW_GC */ |
| 428 | 938 |
| 939 m->m = gap_array_make_marker (endp ? el->end : el->start, pos); | |
| 940 m->endp = endp; | |
| 941 m->next = el->markers; | |
| 942 el->markers = m; | |
| 943 return m; | |
| 944 } | |
| 945 | |
| 946 #define extent_list_move_marker(el, mkr, pos) \ | |
| 947 gap_array_move_marker((mkr)->endp ? (el)->end : (el)->start, (mkr)->m, pos) | |
| 948 | |
| 949 static void | |
| 950 extent_list_delete_marker (Extent_List *el, Extent_List_Marker *m) | |
| 951 { | |
| 952 Extent_List_Marker *p, *prev; | |
| 953 | |
| 954 for (prev = 0, p = el->markers; p && p != m; prev = p, p = p->next) | |
| 955 ; | |
| 956 assert (p); | |
| 957 if (prev) | |
| 958 prev->next = p->next; | |
| 959 else | |
| 960 el->markers = p->next; | |
| 3092 | 961 #ifdef NEW_GC |
| 962 gap_array_delete_marker (m->endp ? el->end : el->start, m->m); | |
| 963 #else /* not NEW_GC */ | |
| 428 | 964 m->next = extent_list_marker_freelist; |
| 965 extent_list_marker_freelist = m; | |
| 966 gap_array_delete_marker (m->endp ? el->end : el->start, m->m); | |
| 3092 | 967 #endif /* not NEW_GC */ |
| 428 | 968 } |
| 969 | |
| 970 #define extent_list_marker_pos(el, mkr) \ | |
| 971 gap_array_marker_pos ((mkr)->endp ? (el)->end : (el)->start, (mkr)->m) | |
| 972 | |
| 973 static Extent_List * | |
| 974 allocate_extent_list (void) | |
| 975 { | |
| 3092 | 976 #ifdef NEW_GC |
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977 Extent_List *el = XEXTENT_LIST (ALLOC_NORMAL_LISP_OBJECT (extent_list)); |
| 3092 | 978 #else /* not NEW_GC */ |
| 428 | 979 Extent_List *el = xnew (Extent_List); |
| 3092 | 980 #endif /* not NEW_GC */ |
| 440 | 981 el->start = make_gap_array (sizeof (EXTENT)); |
| 982 el->end = make_gap_array (sizeof (EXTENT)); | |
| 428 | 983 el->markers = 0; |
| 984 return el; | |
| 985 } | |
| 986 | |
| 3092 | 987 #ifndef NEW_GC |
| 428 | 988 static void |
| 989 free_extent_list (Extent_List *el) | |
| 990 { | |
| 991 free_gap_array (el->start); | |
| 992 free_gap_array (el->end); | |
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993 xfree (el); |
| 428 | 994 } |
| 3092 | 995 #endif /* not NEW_GC */ |
| 428 | 996 |
| 997 | |
| 998 /************************************************************************/ | |
| 999 /* Auxiliary extent structure */ | |
| 1000 /************************************************************************/ | |
| 1001 | |
| 1204 | 1002 static const struct memory_description extent_auxiliary_description[] ={ |
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1003 #define SLOT(x) \ |
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1004 { XD_LISP_OBJECT, offsetof (struct extent_auxiliary, x) }, |
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1005 EXTENT_AUXILIARY_SLOTS |
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1006 #undef SLOT |
| 934 | 1007 { XD_END } |
| 1008 }; | |
| 428 | 1009 static Lisp_Object |
| 1010 mark_extent_auxiliary (Lisp_Object obj) | |
| 1011 { | |
| 1012 struct extent_auxiliary *data = XEXTENT_AUXILIARY (obj); | |
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1013 #define SLOT(x) mark_object (data->x); |
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1014 EXTENT_AUXILIARY_SLOTS |
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1015 #undef SLOT |
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1016 |
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1017 return Qnil; |
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1018 } |
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1019 |
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1020 DEFINE_DUMPABLE_INTERNAL_LISP_OBJECT ("extent-auxiliary", |
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1021 extent_auxiliary, |
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1022 mark_extent_auxiliary, |
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1023 extent_auxiliary_description, |
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1024 struct extent_auxiliary); |
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1025 |
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1026 |
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1027 static Lisp_Object |
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1028 allocate_extent_auxiliary (void) |
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1029 { |
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1030 Lisp_Object obj = ALLOC_NORMAL_LISP_OBJECT (extent_auxiliary); |
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1031 struct extent_auxiliary *data = XEXTENT_AUXILIARY (obj); |
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1032 |
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1033 #define SLOT(x) data->x = Qnil; |
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1034 EXTENT_AUXILIARY_SLOTS |
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1035 #undef SLOT |
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1036 |
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1037 return obj; |
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1038 } |
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1039 |
| 428 | 1040 void |
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1041 attach_extent_auxiliary (EXTENT ext) |
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1042 { |
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1043 Lisp_Object obj = allocate_extent_auxiliary (); |
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1044 |
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1045 ext->plist = Fcons (obj, ext->plist); |
| 428 | 1046 ext->flags.has_aux = 1; |
| 1047 } | |
| 1048 | |
| 1049 | |
| 1050 /************************************************************************/ | |
| 1051 /* Extent info structure */ | |
| 1052 /************************************************************************/ | |
| 1053 | |
| 1054 /* An extent-info structure consists of a list of the buffer or string's | |
| 1055 extents and a "stack of extents" that lists all of the extents over | |
| 1056 a particular position. The stack-of-extents info is used for | |
| 1057 optimization purposes -- it basically caches some info that might | |
| 1058 be expensive to compute. Certain otherwise hard computations are easy | |
| 1059 given the stack of extents over a particular position, and if the | |
| 1060 stack of extents over a nearby position is known (because it was | |
| 1061 calculated at some prior point in time), it's easy to move the stack | |
| 1062 of extents to the proper position. | |
| 1063 | |
| 1064 Given that the stack of extents is an optimization, and given that | |
| 1065 it requires memory, a string's stack of extents is wiped out each | |
| 1066 time a garbage collection occurs. Therefore, any time you retrieve | |
| 1067 the stack of extents, it might not be there. If you need it to | |
| 1068 be there, use the _force version. | |
| 1069 | |
| 1070 Similarly, a string may or may not have an extent_info structure. | |
| 1071 (Generally it won't if there haven't been any extents added to the | |
| 1072 string.) So use the _force version if you need the extent_info | |
| 1073 structure to be there. */ | |
| 1074 | |
| 1075 static struct stack_of_extents *allocate_soe (void); | |
| 3092 | 1076 #ifndef NEW_GC |
| 428 | 1077 static void free_soe (struct stack_of_extents *soe); |
| 3092 | 1078 #endif /* not NEW_GC */ |
| 428 | 1079 static void soe_invalidate (Lisp_Object obj); |
| 1080 | |
| 1204 | 1081 extern const struct sized_memory_description gap_array_marker_description; |
| 1082 | |
| 1083 static const struct memory_description gap_array_marker_description_1[] = { | |
| 3092 | 1084 #ifdef NEW_GC |
| 1085 { XD_LISP_OBJECT, offsetof (Gap_Array_Marker, next) }, | |
| 1086 #else /* not NEW_GC */ | |
| 2367 | 1087 { XD_BLOCK_PTR, offsetof (Gap_Array_Marker, next), 1, |
| 2551 | 1088 { &gap_array_marker_description } }, |
| 3092 | 1089 #endif /* not NEW_GC */ |
| 1204 | 1090 { XD_END } |
| 1091 }; | |
| 1092 | |
| 3092 | 1093 #ifdef NEW_GC |
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1094 DEFINE_NODUMP_INTERNAL_LISP_OBJECT ("gap-array-marker", gap_array_marker, |
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1095 0, gap_array_marker_description_1, |
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1096 struct gap_array_marker); |
| 3092 | 1097 #else /* not NEW_GC */ |
| 1204 | 1098 const struct sized_memory_description gap_array_marker_description = { |
| 1099 sizeof (Gap_Array_Marker), | |
| 1100 gap_array_marker_description_1 | |
| 934 | 1101 }; |
| 3092 | 1102 #endif /* not NEW_GC */ |
| 934 | 1103 |
| 1204 | 1104 static const struct memory_description lispobj_gap_array_description_1[] = { |
| 2881 | 1105 { XD_ELEMCOUNT, offsetof (Gap_Array, gap) }, |
| 1106 { XD_BYTECOUNT, offsetof (Gap_Array, offset_past_gap) }, | |
| 1107 { XD_ELEMCOUNT, offsetof (Gap_Array, els_past_gap) }, | |
| 3092 | 1108 #ifdef NEW_GC |
| 1109 { XD_LISP_OBJECT, offsetof (Gap_Array, markers) }, | |
| 1110 #else /* not NEW_GC */ | |
| 2367 | 1111 { XD_BLOCK_PTR, offsetof (Gap_Array, markers), 1, |
| 2551 | 1112 { &gap_array_marker_description }, XD_FLAG_NO_KKCC }, |
| 3092 | 1113 #endif /* not NEW_GC */ |
| 2367 | 1114 { XD_BLOCK_ARRAY, offsetof (Gap_Array, array), XD_INDIRECT (0, 0), |
| 2551 | 1115 { &lisp_object_description } }, |
| 2367 | 1116 { XD_BLOCK_ARRAY, XD_INDIRECT (1, offsetof (Gap_Array, array)), |
| 2551 | 1117 XD_INDIRECT (2, 0), { &lisp_object_description } }, |
| 934 | 1118 { XD_END } |
| 1119 }; | |
| 1204 | 1120 |
| 3092 | 1121 #ifdef NEW_GC |
| 1122 | |
| 1123 static Bytecount | |
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1124 size_gap_array (Lisp_Object obj) |
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1125 { |
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1126 Gap_Array *ga = XGAP_ARRAY (obj); |
| 3092 | 1127 return offsetof (Gap_Array, array) + (ga->numels + ga->gapsize) * ga->elsize; |
| 1128 } | |
| 1129 | |
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1130 DEFINE_NODUMP_SIZABLE_INTERNAL_LISP_OBJECT ("gap-array", gap_array, |
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1131 0, |
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1132 lispobj_gap_array_description_1, |
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1133 size_gap_array, |
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1134 struct gap_array); |
| 3092 | 1135 #else /* not NEW_GC */ |
| 1204 | 1136 static const struct sized_memory_description lispobj_gap_array_description = { |
| 1137 sizeof (Gap_Array), | |
| 1138 lispobj_gap_array_description_1 | |
| 1139 }; | |
| 1140 | |
| 1141 extern const struct sized_memory_description extent_list_marker_description; | |
| 3092 | 1142 #endif /* not NEW_GC */ |
| 1204 | 1143 |
| 1144 static const struct memory_description extent_list_marker_description_1[] = { | |
| 3092 | 1145 #ifdef NEW_GC |
| 1146 { XD_LISP_OBJECT, offsetof (Extent_List_Marker, m) }, | |
| 1147 { XD_LISP_OBJECT, offsetof (Extent_List_Marker, next) }, | |
| 1148 #else /* not NEW_GC */ | |
| 2367 | 1149 { XD_BLOCK_PTR, offsetof (Extent_List_Marker, m), 1, |
| 2551 | 1150 { &gap_array_marker_description } }, |
| 2367 | 1151 { XD_BLOCK_PTR, offsetof (Extent_List_Marker, next), 1, |
| 2551 | 1152 { &extent_list_marker_description } }, |
| 3092 | 1153 #endif /* not NEW_GC */ |
| 1204 | 1154 { XD_END } |
| 1155 }; | |
| 1156 | |
| 3092 | 1157 #ifdef NEW_GC |
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1158 DEFINE_NODUMP_INTERNAL_LISP_OBJECT ("extent-list-marker", |
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1159 extent_list_marker, |
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1160 0, extent_list_marker_description_1, |
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1161 struct extent_list_marker); |
| 3092 | 1162 #else /* not NEW_GC */ |
| 1204 | 1163 const struct sized_memory_description extent_list_marker_description = { |
| 1164 sizeof (Extent_List_Marker), | |
| 1165 extent_list_marker_description_1 | |
| 1166 }; | |
| 3092 | 1167 #endif /* not NEW_GC */ |
| 1204 | 1168 |
| 1169 static const struct memory_description extent_list_description_1[] = { | |
| 3092 | 1170 #ifdef NEW_GC |
| 1171 { XD_LISP_OBJECT, offsetof (Extent_List, start) }, | |
| 1172 { XD_LISP_OBJECT, offsetof (Extent_List, end) }, | |
| 1173 { XD_LISP_OBJECT, offsetof (Extent_List, markers) }, | |
| 1174 #else /* not NEW_GC */ | |
| 2551 | 1175 { XD_BLOCK_PTR, offsetof (Extent_List, start), 1, |
| 1176 { &lispobj_gap_array_description } }, | |
| 1177 { XD_BLOCK_PTR, offsetof (Extent_List, end), 1, | |
| 1178 { &lispobj_gap_array_description }, XD_FLAG_NO_KKCC }, | |
| 1179 { XD_BLOCK_PTR, offsetof (Extent_List, markers), 1, | |
| 1180 { &extent_list_marker_description }, XD_FLAG_NO_KKCC }, | |
| 3092 | 1181 #endif /* not NEW_GC */ |
| 1204 | 1182 { XD_END } |
| 1183 }; | |
| 1184 | |
| 3092 | 1185 #ifdef NEW_GC |
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1186 DEFINE_NODUMP_INTERNAL_LISP_OBJECT ("extent-list", extent_list, |
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1187 0, extent_list_description_1, |
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1188 struct extent_list); |
| 3092 | 1189 #else /* not NEW_GC */ |
| 1204 | 1190 static const struct sized_memory_description extent_list_description = { |
| 1191 sizeof (Extent_List), | |
| 1192 extent_list_description_1 | |
| 1193 }; | |
| 3092 | 1194 #endif /* not NEW_GC */ |
| 1204 | 1195 |
| 1196 static const struct memory_description stack_of_extents_description_1[] = { | |
| 3092 | 1197 #ifdef NEW_GC |
| 1198 { XD_LISP_OBJECT, offsetof (Stack_Of_Extents, extents) }, | |
| 1199 #else /* not NEW_GC */ | |
| 2551 | 1200 { XD_BLOCK_PTR, offsetof (Stack_Of_Extents, extents), 1, |
| 1201 { &extent_list_description } }, | |
| 3092 | 1202 #endif /* not NEW_GC */ |
| 1204 | 1203 { XD_END } |
| 1204 }; | |
| 1205 | |
| 3092 | 1206 #ifdef NEW_GC |
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1207 DEFINE_NODUMP_INTERNAL_LISP_OBJECT ("stack-of-extents", stack_of_extents, |
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1208 0, stack_of_extents_description_1, |
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1209 struct stack_of_extents); |
| 3092 | 1210 #else /* not NEW_GC */ |
| 1204 | 1211 static const struct sized_memory_description stack_of_extents_description = { |
| 1212 sizeof (Stack_Of_Extents), | |
| 1213 stack_of_extents_description_1 | |
| 1214 }; | |
| 3092 | 1215 #endif /* not NEW_GC */ |
| 1204 | 1216 |
| 1217 static const struct memory_description extent_info_description [] = { | |
| 3092 | 1218 #ifdef NEW_GC |
| 1219 { XD_LISP_OBJECT, offsetof (struct extent_info, extents) }, | |
| 1220 { XD_LISP_OBJECT, offsetof (struct extent_info, soe) }, | |
| 1221 #else /* not NEW_GC */ | |
| 2367 | 1222 { XD_BLOCK_PTR, offsetof (struct extent_info, extents), 1, |
| 2551 | 1223 { &extent_list_description } }, |
| 2367 | 1224 { XD_BLOCK_PTR, offsetof (struct extent_info, soe), 1, |
| 2551 | 1225 { &stack_of_extents_description }, XD_FLAG_NO_KKCC }, |
| 3092 | 1226 #endif /* not NEW_GC */ |
| 1204 | 1227 { XD_END } |
| 1228 }; | |
| 934 | 1229 |
| 428 | 1230 static Lisp_Object |
| 1231 mark_extent_info (Lisp_Object obj) | |
| 1232 { | |
| 1233 struct extent_info *data = (struct extent_info *) XEXTENT_INFO (obj); | |
| 1234 int i; | |
| 1235 Extent_List *list = data->extents; | |
| 1236 | |
| 1237 /* Vbuffer_defaults and Vbuffer_local_symbols are buffer-like | |
| 1238 objects that are created specially and never have their extent | |
| 1239 list initialized (or rather, it is set to zero in | |
| 1240 nuke_all_buffer_slots()). However, these objects get | |
| 1241 garbage-collected so we have to deal. | |
| 1242 | |
| 1243 (Also the list can be zero when we're dealing with a destroyed | |
| 1244 buffer.) */ | |
| 1245 | |
| 1246 if (list) | |
| 1247 { | |
| 1248 for (i = 0; i < extent_list_num_els (list); i++) | |
| 1249 { | |
| 1250 struct extent *extent = extent_list_at (list, i, 0); | |
| 793 | 1251 Lisp_Object exobj = wrap_extent (extent); |
| 1252 | |
| 428 | 1253 mark_object (exobj); |
| 1254 } | |
| 1255 } | |
| 1256 | |
| 1257 return Qnil; | |
| 1258 } | |
| 1259 | |
| 3263 | 1260 #ifdef NEW_GC |
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1261 DEFINE_NODUMP_INTERNAL_LISP_OBJECT ("extent-info", extent_info, |
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1262 mark_extent_info, |
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1263 extent_info_description, |
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1264 struct extent_info); |
| 3263 | 1265 #else /* not NEW_GC */ |
| 428 | 1266 static void |
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1267 finalize_extent_info (Lisp_Object obj) |
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1268 { |
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1269 struct extent_info *data = XEXTENT_INFO (obj); |
| 428 | 1270 |
| 3092 | 1271 data->soe = 0; |
| 1272 data->extents = 0; | |
| 428 | 1273 if (data->soe) |
| 1274 { | |
| 1275 free_soe (data->soe); | |
| 1276 data->soe = 0; | |
| 1277 } | |
| 1278 if (data->extents) | |
| 1279 { | |
| 1280 free_extent_list (data->extents); | |
| 1281 data->extents = 0; | |
| 1282 } | |
| 1283 } | |
| 1284 | |
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1285 DEFINE_NODUMP_LISP_OBJECT ("extent-info", extent_info, |
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1286 mark_extent_info, internal_object_printer, |
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1287 finalize_extent_info, 0, 0, |
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1288 extent_info_description, |
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1289 struct extent_info); |
| 3263 | 1290 #endif /* not NEW_GC */ |
| 428 | 1291 |
| 1292 static Lisp_Object | |
| 1293 allocate_extent_info (void) | |
| 1294 { | |
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1295 Lisp_Object obj = ALLOC_NORMAL_LISP_OBJECT (extent_info); |
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1296 struct extent_info *data = XEXTENT_INFO (obj); |
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1297 |
| 428 | 1298 data->extents = allocate_extent_list (); |
| 1299 data->soe = 0; | |
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1300 return obj; |
| 428 | 1301 } |
| 1302 | |
| 1303 void | |
| 1304 flush_cached_extent_info (Lisp_Object extent_info) | |
| 1305 { | |
| 1306 struct extent_info *data = XEXTENT_INFO (extent_info); | |
| 1307 | |
| 1308 if (data->soe) | |
| 1309 { | |
| 3092 | 1310 #ifndef NEW_GC |
| 428 | 1311 free_soe (data->soe); |
| 3092 | 1312 #endif /* not NEW_GC */ |
| 428 | 1313 data->soe = 0; |
| 1314 } | |
| 1315 } | |
| 1316 | |
| 1317 | |
| 1318 /************************************************************************/ | |
| 1319 /* Buffer/string extent primitives */ | |
| 1320 /************************************************************************/ | |
| 1321 | |
| 1322 /* The functions in this section are the ONLY ones that should know | |
| 1323 about the internal implementation of the extent lists. Other functions | |
| 1324 should only know that there are two orderings on extents, the "display" | |
| 1325 order (sorted by start position, basically) and the e-order (sorted | |
| 1326 by end position, basically), and that certain operations are provided | |
| 1327 to manipulate the list. */ | |
| 1328 | |
| 1329 /* ------------------------------- */ | |
| 1330 /* basic primitives */ | |
| 1331 /* ------------------------------- */ | |
| 1332 | |
| 1333 static Lisp_Object | |
| 1334 decode_buffer_or_string (Lisp_Object object) | |
| 1335 { | |
| 1336 if (NILP (object)) | |
| 793 | 1337 object = wrap_buffer (current_buffer); |
| 428 | 1338 else if (BUFFERP (object)) |
| 1339 CHECK_LIVE_BUFFER (object); | |
| 1340 else if (STRINGP (object)) | |
| 1341 ; | |
| 1342 else | |
| 1343 dead_wrong_type_argument (Qbuffer_or_string_p, object); | |
| 1344 | |
| 1345 return object; | |
| 1346 } | |
| 1347 | |
| 1348 EXTENT | |
| 1349 extent_ancestor_1 (EXTENT e) | |
| 1350 { | |
| 1351 while (e->flags.has_parent) | |
| 1352 { | |
| 1353 /* There should be no circularities except in case of a logic | |
| 1354 error somewhere in the extent code */ | |
| 1355 e = XEXTENT (XEXTENT_AUXILIARY (XCAR (e->plist))->parent); | |
| 1356 } | |
| 1357 return e; | |
| 1358 } | |
| 1359 | |
| 1360 /* Given an extent object (string or buffer or nil), return its extent info. | |
| 1361 This may be 0 for a string. */ | |
| 1362 | |
| 1363 static struct extent_info * | |
| 1364 buffer_or_string_extent_info (Lisp_Object object) | |
| 1365 { | |
| 1366 if (STRINGP (object)) | |
| 1367 { | |
| 793 | 1368 Lisp_Object plist = XSTRING_PLIST (object); |
| 428 | 1369 if (!CONSP (plist) || !EXTENT_INFOP (XCAR (plist))) |
| 1370 return 0; | |
| 1371 return XEXTENT_INFO (XCAR (plist)); | |
| 1372 } | |
| 1373 else if (NILP (object)) | |
| 1374 return 0; | |
| 1375 else | |
| 1376 return XEXTENT_INFO (XBUFFER (object)->extent_info); | |
| 1377 } | |
| 1378 | |
| 1379 /* Given a string or buffer, return its extent list. This may be | |
| 1380 0 for a string. */ | |
| 1381 | |
| 1382 static Extent_List * | |
| 1383 buffer_or_string_extent_list (Lisp_Object object) | |
| 1384 { | |
| 1385 struct extent_info *info = buffer_or_string_extent_info (object); | |
| 1386 | |
| 1387 if (!info) | |
| 1388 return 0; | |
| 1389 return info->extents; | |
| 1390 } | |
| 1391 | |
| 1392 /* Given a string or buffer, return its extent info. If it's not there, | |
| 1393 create it. */ | |
| 1394 | |
| 1395 static struct extent_info * | |
| 1396 buffer_or_string_extent_info_force (Lisp_Object object) | |
| 1397 { | |
| 1398 struct extent_info *info = buffer_or_string_extent_info (object); | |
| 1399 | |
| 1400 if (!info) | |
| 1401 { | |
| 1402 Lisp_Object extent_info; | |
| 1403 | |
| 1404 assert (STRINGP (object)); /* should never happen for buffers -- | |
| 1405 the only buffers without an extent | |
| 1406 info are those after finalization, | |
| 1407 destroyed buffers, or special | |
| 1408 Lisp-inaccessible buffer objects. */ | |
| 1409 extent_info = allocate_extent_info (); | |
| 793 | 1410 XSTRING_PLIST (object) = Fcons (extent_info, XSTRING_PLIST (object)); |
| 428 | 1411 return XEXTENT_INFO (extent_info); |
| 1412 } | |
| 1413 | |
| 1414 return info; | |
| 1415 } | |
| 1416 | |
| 1417 /* Detach all the extents in OBJECT. Called from redisplay. */ | |
| 1418 | |
| 1419 void | |
| 1420 detach_all_extents (Lisp_Object object) | |
| 1421 { | |
| 1422 struct extent_info *data = buffer_or_string_extent_info (object); | |
| 1423 | |
| 1424 if (data) | |
| 1425 { | |
| 1426 if (data->extents) | |
| 1427 { | |
| 1428 int i; | |
| 1429 | |
| 1430 for (i = 0; i < extent_list_num_els (data->extents); i++) | |
| 1431 { | |
| 1432 EXTENT e = extent_list_at (data->extents, i, 0); | |
| 1433 /* No need to do detach_extent(). Just nuke the damn things, | |
| 1434 which results in the equivalent but faster. */ | |
| 1435 set_extent_start (e, -1); | |
| 1436 set_extent_end (e, -1); | |
| 1437 } | |
| 3466 | 1438 |
| 1439 /* But we need to clear all the lists containing extents or | |
| 1440 havoc will result. */ | |
| 1441 extent_list_delete_all (data->extents); | |
| 428 | 1442 } |
| 1443 soe_invalidate (object); | |
| 1444 } | |
| 1445 } | |
| 1446 | |
| 1447 | |
| 1448 void | |
| 1449 init_buffer_extents (struct buffer *b) | |
| 1450 { | |
| 1451 b->extent_info = allocate_extent_info (); | |
| 1452 } | |
| 1453 | |
| 1454 void | |
| 1455 uninit_buffer_extents (struct buffer *b) | |
| 1456 { | |
| 1457 /* Don't destroy the extents here -- there may still be children | |
| 1458 extents pointing to the extents. */ | |
| 771 | 1459 detach_all_extents (wrap_buffer (b)); |
| 3092 | 1460 #ifndef NEW_GC |
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1461 finalize_extent_info (b->extent_info); |
| 3092 | 1462 #endif /* not NEW_GC */ |
| 428 | 1463 } |
| 1464 | |
| 1465 /* Retrieve the extent list that an extent is a member of; the | |
| 1466 return value will never be 0 except in destroyed buffers (in which | |
| 1467 case the only extents that can refer to this buffer are detached | |
| 1468 ones). */ | |
| 1469 | |
| 1470 #define extent_extent_list(e) buffer_or_string_extent_list (extent_object (e)) | |
| 1471 | |
| 1472 /* ------------------------------- */ | |
| 1473 /* stack of extents */ | |
| 1474 /* ------------------------------- */ | |
| 1475 | |
| 1476 #ifdef ERROR_CHECK_EXTENTS | |
| 1477 | |
| 771 | 1478 /* See unicode.c for more about sledgehammer checks */ |
| 1479 | |
| 428 | 1480 void |
| 1481 sledgehammer_extent_check (Lisp_Object object) | |
| 1482 { | |
| 1483 int i; | |
| 1484 int endp; | |
| 1485 Extent_List *el = buffer_or_string_extent_list (object); | |
| 1486 struct buffer *buf = 0; | |
| 1487 | |
| 1488 if (!el) | |
| 1489 return; | |
| 1490 | |
| 1491 if (BUFFERP (object)) | |
| 1492 buf = XBUFFER (object); | |
| 1493 | |
| 1494 for (endp = 0; endp < 2; endp++) | |
| 1495 for (i = 1; i < extent_list_num_els (el); i++) | |
| 1496 { | |
| 1497 EXTENT e1 = extent_list_at (el, i-1, endp); | |
| 1498 EXTENT e2 = extent_list_at (el, i, endp); | |
| 1499 if (buf) | |
| 1500 { | |
| 1501 assert (extent_start (e1) <= buf->text->gpt || | |
| 1502 extent_start (e1) > buf->text->gpt + buf->text->gap_size); | |
| 1503 assert (extent_end (e1) <= buf->text->gpt || | |
| 1504 extent_end (e1) > buf->text->gpt + buf->text->gap_size); | |
| 1505 } | |
| 1506 assert (extent_start (e1) <= extent_end (e1)); | |
| 1507 assert (endp ? (EXTENT_E_LESS_EQUAL (e1, e2)) : | |
| 1508 (EXTENT_LESS_EQUAL (e1, e2))); | |
| 1509 } | |
| 1510 } | |
| 1511 | |
| 1512 #endif | |
| 1513 | |
| 1514 static Stack_Of_Extents * | |
| 1515 buffer_or_string_stack_of_extents (Lisp_Object object) | |
| 1516 { | |
| 1517 struct extent_info *info = buffer_or_string_extent_info (object); | |
| 1518 if (!info) | |
| 1519 return 0; | |
| 1520 return info->soe; | |
| 1521 } | |
| 1522 | |
| 1523 static Stack_Of_Extents * | |
| 1524 buffer_or_string_stack_of_extents_force (Lisp_Object object) | |
| 1525 { | |
| 1526 struct extent_info *info = buffer_or_string_extent_info_force (object); | |
| 1527 if (!info->soe) | |
| 1528 info->soe = allocate_soe (); | |
| 1529 return info->soe; | |
| 1530 } | |
| 1531 | |
| 983 | 1532 /* #### don't even think of #define'ing this, the prototype of |
| 1533 print_extent_1 has changed! */ | |
| 428 | 1534 /* #define SOE_DEBUG */ |
| 1535 | |
| 1536 #ifdef SOE_DEBUG | |
| 1537 | |
| 1538 static void print_extent_1 (char *buf, Lisp_Object extent); | |
| 1539 | |
| 1540 static void | |
| 1541 print_extent_2 (EXTENT e) | |
| 1542 { | |
| 1543 Lisp_Object extent; | |
| 1544 char buf[200]; | |
| 1545 | |
| 793 | 1546 extent = wrap_extent (e); |
| 428 | 1547 print_extent_1 (buf, extent); |
| 1548 fputs (buf, stdout); | |
| 1549 } | |
| 1550 | |
| 1551 static void | |
| 1552 soe_dump (Lisp_Object obj) | |
| 1553 { | |
| 1554 int i; | |
| 1555 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj); | |
| 1556 Extent_List *sel; | |
| 1557 int endp; | |
| 1558 | |
| 1559 if (!soe) | |
| 1560 { | |
| 1561 printf ("No SOE"); | |
| 1562 return; | |
| 1563 } | |
| 1564 sel = soe->extents; | |
| 826 | 1565 printf ("SOE pos is %d (memxpos %d)\n", |
| 428 | 1566 soe->pos < 0 ? soe->pos : |
| 826 | 1567 buffer_or_string_memxpos_to_bytexpos (obj, soe->pos), |
| 428 | 1568 soe->pos); |
| 1569 for (endp = 0; endp < 2; endp++) | |
| 1570 { | |
| 1571 printf (endp ? "SOE end:" : "SOE start:"); | |
| 1572 for (i = 0; i < extent_list_num_els (sel); i++) | |
| 1573 { | |
| 1574 EXTENT e = extent_list_at (sel, i, endp); | |
| 1575 putchar ('\t'); | |
| 1576 print_extent_2 (e); | |
| 1577 } | |
| 1578 putchar ('\n'); | |
| 1579 } | |
| 1580 putchar ('\n'); | |
| 1581 } | |
| 1582 | |
| 1583 #endif | |
| 1584 | |
| 1585 /* Insert EXTENT into OBJ's stack of extents, if necessary. */ | |
| 1586 | |
| 1587 static void | |
| 1588 soe_insert (Lisp_Object obj, EXTENT extent) | |
| 1589 { | |
| 1590 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj); | |
| 1591 | |
| 1592 #ifdef SOE_DEBUG | |
| 1593 printf ("Inserting into SOE: "); | |
| 1594 print_extent_2 (extent); | |
| 1595 putchar ('\n'); | |
| 1596 #endif | |
| 1597 if (!soe || soe->pos < extent_start (extent) || | |
| 1598 soe->pos > extent_end (extent)) | |
| 1599 { | |
| 1600 #ifdef SOE_DEBUG | |
| 1601 printf ("(not needed)\n\n"); | |
| 1602 #endif | |
| 1603 return; | |
| 1604 } | |
| 1605 extent_list_insert (soe->extents, extent); | |
| 1606 #ifdef SOE_DEBUG | |
| 1607 puts ("SOE afterwards is:"); | |
| 1608 soe_dump (obj); | |
| 1609 #endif | |
| 1610 } | |
| 1611 | |
| 1612 /* Delete EXTENT from OBJ's stack of extents, if necessary. */ | |
| 1613 | |
| 1614 static void | |
| 1615 soe_delete (Lisp_Object obj, EXTENT extent) | |
| 1616 { | |
| 1617 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj); | |
| 1618 | |
| 1619 #ifdef SOE_DEBUG | |
| 1620 printf ("Deleting from SOE: "); | |
| 1621 print_extent_2 (extent); | |
| 1622 putchar ('\n'); | |
| 1623 #endif | |
| 1624 if (!soe || soe->pos < extent_start (extent) || | |
| 1625 soe->pos > extent_end (extent)) | |
| 1626 { | |
| 1627 #ifdef SOE_DEBUG | |
| 1628 puts ("(not needed)\n"); | |
| 1629 #endif | |
| 1630 return; | |
| 1631 } | |
| 1632 extent_list_delete (soe->extents, extent); | |
| 1633 #ifdef SOE_DEBUG | |
| 1634 puts ("SOE afterwards is:"); | |
| 1635 soe_dump (obj); | |
| 1636 #endif | |
| 1637 } | |
| 1638 | |
| 1639 /* Move OBJ's stack of extents to lie over the specified position. */ | |
| 1640 | |
| 1641 static void | |
| 826 | 1642 soe_move (Lisp_Object obj, Memxpos pos) |
| 428 | 1643 { |
| 1644 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents_force (obj); | |
| 1645 Extent_List *sel = soe->extents; | |
| 1646 int numsoe = extent_list_num_els (sel); | |
| 1647 Extent_List *bel = buffer_or_string_extent_list (obj); | |
| 1648 int direction; | |
| 1649 int endp; | |
| 1650 | |
| 1651 #ifdef ERROR_CHECK_EXTENTS | |
| 1652 assert (bel); | |
| 1653 #endif | |
| 1654 | |
| 1655 #ifdef SOE_DEBUG | |
| 826 | 1656 printf ("Moving SOE from %d (memxpos %d) to %d (memxpos %d)\n", |
| 428 | 1657 soe->pos < 0 ? soe->pos : |
| 826 | 1658 buffer_or_string_memxpos_to_bytexpos (obj, soe->pos), soe->pos, |
| 1659 buffer_or_string_memxpos_to_bytexpos (obj, pos), pos); | |
| 428 | 1660 #endif |
| 1661 if (soe->pos < pos) | |
| 1662 { | |
| 1663 direction = 1; | |
| 1664 endp = 0; | |
| 1665 } | |
| 1666 else if (soe->pos > pos) | |
| 1667 { | |
| 1668 direction = -1; | |
| 1669 endp = 1; | |
| 1670 } | |
| 1671 else | |
| 1672 { | |
| 1673 #ifdef SOE_DEBUG | |
| 1674 puts ("(not needed)\n"); | |
| 1675 #endif | |
| 1676 return; | |
| 1677 } | |
| 1678 | |
| 1679 /* For DIRECTION = 1: Any extent that overlaps POS is either in the | |
| 1680 SOE (if the extent starts at or before SOE->POS) or is greater | |
| 1681 (in the display order) than any extent in the SOE (if it starts | |
| 1682 after SOE->POS). | |
| 1683 | |
| 1684 For DIRECTION = -1: Any extent that overlaps POS is either in the | |
| 1685 SOE (if the extent ends at or after SOE->POS) or is less (in the | |
| 1686 e-order) than any extent in the SOE (if it ends before SOE->POS). | |
| 1687 | |
| 1688 We proceed in two stages: | |
| 1689 | |
| 1690 1) delete all extents in the SOE that don't overlap POS. | |
| 1691 2) insert all extents into the SOE that start (or end, when | |
| 1692 DIRECTION = -1) in (SOE->POS, POS] and that overlap | |
| 1693 POS. (Don't include SOE->POS in the range because those | |
| 1694 extents would already be in the SOE.) | |
| 1695 */ | |
| 1696 | |
| 1697 /* STAGE 1. */ | |
| 1698 | |
| 1699 if (numsoe > 0) | |
| 1700 { | |
| 1701 /* Delete all extents in the SOE that don't overlap POS. | |
| 1702 This is all extents that end before (or start after, | |
| 1703 if DIRECTION = -1) POS. | |
| 1704 */ | |
| 1705 | |
| 1706 /* Deleting extents from the SOE is tricky because it changes | |
| 1707 the positions of extents. If we are deleting in the forward | |
| 1708 direction we have to call extent_list_at() on the same position | |
| 1709 over and over again because positions after the deleted element | |
| 1710 get shifted back by 1. To make life simplest, we delete forward | |
| 1711 irrespective of DIRECTION. | |
| 1712 */ | |
| 1713 int start, end; | |
| 1714 int i; | |
| 1715 | |
| 1716 if (direction > 0) | |
| 1717 { | |
| 1718 start = 0; | |
| 1719 end = extent_list_locate_from_pos (sel, pos, 1); | |
| 1720 } | |
| 1721 else | |
| 1722 { | |
| 1723 start = extent_list_locate_from_pos (sel, pos+1, 0); | |
| 1724 end = numsoe; | |
| 1725 } | |
| 1726 | |
| 1727 for (i = start; i < end; i++) | |
| 1728 extent_list_delete (sel, extent_list_at (sel, start /* see above */, | |
| 1729 !endp)); | |
| 1730 } | |
| 1731 | |
| 1732 /* STAGE 2. */ | |
| 1733 | |
| 1734 { | |
| 1735 int start_pos; | |
| 1736 | |
| 1737 if (direction < 0) | |
| 1738 start_pos = extent_list_locate_from_pos (bel, soe->pos, endp) - 1; | |
| 1739 else | |
| 1740 start_pos = extent_list_locate_from_pos (bel, soe->pos + 1, endp); | |
| 1741 | |
| 1742 for (; start_pos >= 0 && start_pos < extent_list_num_els (bel); | |
| 1743 start_pos += direction) | |
| 1744 { | |
| 1745 EXTENT e = extent_list_at (bel, start_pos, endp); | |
| 1746 if ((direction > 0) ? | |
| 1747 (extent_start (e) > pos) : | |
| 1748 (extent_end (e) < pos)) | |
| 1749 break; /* All further extents lie on the far side of POS | |
| 1750 and thus can't overlap. */ | |
| 1751 if ((direction > 0) ? | |
| 1752 (extent_end (e) >= pos) : | |
| 1753 (extent_start (e) <= pos)) | |
| 1754 extent_list_insert (sel, e); | |
| 1755 } | |
| 1756 } | |
| 1757 | |
| 1758 soe->pos = pos; | |
| 1759 #ifdef SOE_DEBUG | |
| 1760 puts ("SOE afterwards is:"); | |
| 1761 soe_dump (obj); | |
| 1762 #endif | |
| 1763 } | |
| 1764 | |
| 1765 static void | |
| 1766 soe_invalidate (Lisp_Object obj) | |
| 1767 { | |
| 1768 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (obj); | |
| 1769 | |
| 1770 if (soe) | |
| 1771 { | |
| 1772 extent_list_delete_all (soe->extents); | |
| 1773 soe->pos = -1; | |
| 1774 } | |
| 1775 } | |
| 1776 | |
| 1777 static struct stack_of_extents * | |
| 1778 allocate_soe (void) | |
| 1779 { | |
| 3092 | 1780 #ifdef NEW_GC |
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1781 struct stack_of_extents *soe = |
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1782 XSTACK_OF_EXTENTS (ALLOC_NORMAL_LISP_OBJECT (stack_of_extents)); |
| 3092 | 1783 #else /* not NEW_GC */ |
| 428 | 1784 struct stack_of_extents *soe = xnew_and_zero (struct stack_of_extents); |
| 3092 | 1785 #endif /* not NEW_GC */ |
| 428 | 1786 soe->extents = allocate_extent_list (); |
| 1787 soe->pos = -1; | |
| 1788 return soe; | |
| 1789 } | |
| 1790 | |
| 3092 | 1791 #ifndef NEW_GC |
| 428 | 1792 static void |
| 1793 free_soe (struct stack_of_extents *soe) | |
| 1794 { | |
| 1795 free_extent_list (soe->extents); | |
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1796 xfree (soe); |
| 428 | 1797 } |
| 3092 | 1798 #endif /* not NEW_GC */ |
| 428 | 1799 |
| 1800 /* ------------------------------- */ | |
| 1801 /* other primitives */ | |
| 1802 /* ------------------------------- */ | |
| 1803 | |
| 1804 /* Return the start (endp == 0) or end (endp == 1) of an extent as | |
| 1805 a byte index. If you want the value as a memory index, use | |
| 1806 extent_endpoint(). If you want the value as a buffer position, | |
| 826 | 1807 use extent_endpoint_char(). */ |
| 1808 | |
| 1809 Bytexpos | |
| 1810 extent_endpoint_byte (EXTENT extent, int endp) | |
| 1811 { | |
| 1812 assert (EXTENT_LIVE_P (extent)); | |
| 1813 assert (!extent_detached_p (extent)); | |
| 1814 { | |
| 1815 Memxpos i = endp ? extent_end (extent) : extent_start (extent); | |
| 1816 Lisp_Object obj = extent_object (extent); | |
| 1817 return buffer_or_string_memxpos_to_bytexpos (obj, i); | |
| 1818 } | |
| 1819 } | |
| 1820 | |
| 1821 Charxpos | |
| 1822 extent_endpoint_char (EXTENT extent, int endp) | |
| 428 | 1823 { |
| 1824 assert (EXTENT_LIVE_P (extent)); | |
| 1825 assert (!extent_detached_p (extent)); | |
| 1826 { | |
| 826 | 1827 Memxpos i = endp ? extent_end (extent) : extent_start (extent); |
| 428 | 1828 Lisp_Object obj = extent_object (extent); |
| 826 | 1829 return buffer_or_string_memxpos_to_charxpos (obj, i); |
| 428 | 1830 } |
| 1831 } | |
| 1832 | |
| 1833 static void | |
| 826 | 1834 signal_single_extent_changed (EXTENT extent, Lisp_Object property, |
| 2286 | 1835 Bytexpos UNUSED (old_start), |
| 1836 Bytexpos UNUSED (old_end)) | |
| 826 | 1837 { |
| 1838 EXTENT anc = extent_ancestor (extent); | |
| 1839 /* Redisplay checks */ | |
| 1840 if (NILP (property) ? | |
| 1841 (!NILP (extent_face (anc)) || | |
| 1842 !NILP (extent_begin_glyph (anc)) || | |
| 1843 !NILP (extent_end_glyph (anc)) || | |
| 1844 !NILP (extent_mouse_face (anc)) || | |
| 1845 !NILP (extent_invisible (anc)) || | |
| 1846 !NILP (extent_initial_redisplay_function (anc))) : | |
| 1847 EQ (property, Qface) || | |
| 1848 EQ (property, Qmouse_face) || | |
| 1849 EQ (property, Qbegin_glyph) || | |
| 1850 EQ (property, Qend_glyph) || | |
| 1851 EQ (property, Qbegin_glyph_layout) || | |
| 1852 EQ (property, Qend_glyph_layout) || | |
| 1853 EQ (property, Qinvisible) || | |
| 1854 EQ (property, Qinitial_redisplay_function) || | |
| 1855 EQ (property, Qpriority)) | |
| 1856 { | |
| 1857 Lisp_Object object = extent_object (extent); | |
| 1858 | |
| 1859 if (extent_detached_p (extent)) | |
| 1860 return; | |
| 1861 | |
| 1862 else if (STRINGP (object)) | |
| 1863 { | |
| 1864 /* #### Changes to string extents can affect redisplay if they are | |
| 1865 in the modeline or in the gutters. | |
| 1866 | |
| 1867 If the extent is in some generated-modeline-string: when we | |
| 1868 change an extent in generated-modeline-string, this changes its | |
| 1869 parent, which is in `modeline-format', so we should force the | |
| 1870 modeline to be updated. But how to determine whether a string | |
| 1871 is a `generated-modeline-string'? Looping through all buffers | |
| 1872 is not very efficient. Should we add all | |
| 1873 `generated-modeline-string' strings to a hash table? Maybe | |
| 1874 efficiency is not the greatest concern here and there's no big | |
| 1875 loss in looping over the buffers. | |
| 1876 | |
| 1877 If the extent is in a gutter we mark the gutter as | |
| 1878 changed. This means (a) we can update extents in the gutters | |
| 1879 when we need it. (b) we don't have to update the gutters when | |
| 1880 only extents attached to buffers have changed. */ | |
| 1881 | |
| 1882 if (!in_modeline_generation) | |
| 1883 MARK_EXTENTS_CHANGED; | |
| 1884 gutter_extent_signal_changed_region_maybe | |
| 1885 (object, extent_endpoint_char (extent, 0), | |
| 1886 extent_endpoint_char (extent, 1)); | |
| 1887 } | |
| 1888 else if (BUFFERP (object)) | |
| 1889 { | |
| 1890 struct buffer *b; | |
| 1891 b = XBUFFER (object); | |
| 1892 BUF_FACECHANGE (b)++; | |
| 1893 MARK_EXTENTS_CHANGED; | |
| 1894 if (NILP (property) ? !NILP (extent_invisible (anc)) : | |
| 1895 EQ (property, Qinvisible)) | |
| 1896 MARK_CLIP_CHANGED; | |
| 1897 buffer_extent_signal_changed_region | |
| 1898 (b, extent_endpoint_char (extent, 0), | |
| 1899 extent_endpoint_char (extent, 1)); | |
| 1900 } | |
| 1901 } | |
| 1902 | |
| 1903 /* Check for syntax table property change */ | |
| 1904 if (NILP (property) ? !NILP (Fextent_property (wrap_extent (extent), | |
| 1905 Qsyntax_table, Qnil)) : | |
| 1906 EQ (property, Qsyntax_table)) | |
| 3250 | 1907 signal_syntax_cache_extent_changed (extent); |
| 826 | 1908 } |
| 1909 | |
| 1910 /* Make note that a change has happened in EXTENT. The change was either | |
| 1911 to a property or to the endpoints (but not both at once). If PROPERTY | |
| 1912 is non-nil, the change happened to that property; otherwise, the change | |
| 1913 happened to the endpoints, and the old ones are given. Currently, all | |
| 1914 endpoints changes are in the form of two signals, a detach followed by | |
| 1915 an attach, and when detaching, we are signalled before the extent is | |
| 1916 detached. (You can distinguish a detach from an attach because the | |
| 1917 latter has old_start == -1 and old_end == -1.) (#### We don't currently | |
| 1918 give the old property. If someone needs that, this will have to | |
| 1919 change.) KLUDGE: If PROPERTY is Qt, all properties may have changed | |
| 1920 because the parent was changed. #### We need to handle this properly, by | |
| 1921 mapping over properties. */ | |
| 1922 | |
| 1923 static void | |
| 1924 signal_extent_changed (EXTENT extent, Lisp_Object property, | |
| 1925 Bytexpos old_start, Bytexpos old_end, | |
| 1926 int descendants_too) | |
| 1927 { | |
| 428 | 1928 /* we could easily encounter a detached extent while traversing the |
| 1929 children, but we should never be able to encounter a dead extent. */ | |
| 1930 assert (EXTENT_LIVE_P (extent)); | |
| 1931 | |
| 1932 if (descendants_too) | |
| 1933 { | |
| 1934 Lisp_Object children = extent_children (extent); | |
| 1935 | |
| 1936 if (!NILP (children)) | |
| 1937 { | |
| 826 | 1938 /* first process all of the extent's children. We will lose |
| 1939 big-time if there are any circularities here, so we sure as | |
| 1940 hell better ensure that there aren't. */ | |
| 831 | 1941 LIST_LOOP_2 (child, XWEAK_LIST_LIST (children)) |
| 1942 signal_extent_changed (XEXTENT (child), property, old_start, | |
| 840 | 1943 old_end, descendants_too); |
| 428 | 1944 } |
| 1945 } | |
| 1946 | |
| 826 | 1947 /* now process the extent itself. */ |
| 1948 signal_single_extent_changed (extent, property, old_start, old_end); | |
| 1949 } | |
| 428 | 1950 |
| 1951 static void | |
| 826 | 1952 signal_extent_property_changed (EXTENT extent, Lisp_Object property, |
| 1953 int descendants_too) | |
| 1954 { | |
| 1955 signal_extent_changed (extent, property, 0, 0, descendants_too); | |
| 428 | 1956 } |
| 1957 | |
| 1958 static EXTENT | |
| 1959 make_extent_detached (Lisp_Object object) | |
| 1960 { | |
| 1961 EXTENT extent = allocate_extent (); | |
| 1962 | |
| 1963 assert (NILP (object) || STRINGP (object) || | |
| 1964 (BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object)))); | |
| 1965 extent_object (extent) = object; | |
| 1966 /* Now make sure the extent info exists. */ | |
| 1967 if (!NILP (object)) | |
| 1968 buffer_or_string_extent_info_force (object); | |
| 1969 return extent; | |
| 1970 } | |
| 1971 | |
| 1972 /* A "real" extent is any extent other than the internal (not-user-visible) | |
| 1973 extents used by `map-extents'. */ | |
| 1974 | |
| 1975 static EXTENT | |
| 1976 real_extent_at_forward (Extent_List *el, int pos, int endp) | |
| 1977 { | |
| 1978 for (; pos < extent_list_num_els (el); pos++) | |
| 1979 { | |
| 1980 EXTENT e = extent_list_at (el, pos, endp); | |
| 1981 if (!extent_internal_p (e)) | |
| 1982 return e; | |
| 1983 } | |
| 1984 return 0; | |
| 1985 } | |
| 1986 | |
| 1987 static EXTENT | |
| 1988 real_extent_at_backward (Extent_List *el, int pos, int endp) | |
| 1989 { | |
| 1990 for (; pos >= 0; pos--) | |
| 1991 { | |
| 1992 EXTENT e = extent_list_at (el, pos, endp); | |
| 1993 if (!extent_internal_p (e)) | |
| 1994 return e; | |
| 1995 } | |
| 1996 return 0; | |
| 1997 } | |
| 1998 | |
| 1999 static EXTENT | |
| 2000 extent_first (Lisp_Object obj) | |
| 2001 { | |
| 2002 Extent_List *el = buffer_or_string_extent_list (obj); | |
| 2003 | |
| 2004 if (!el) | |
| 2005 return 0; | |
| 2006 return real_extent_at_forward (el, 0, 0); | |
| 2007 } | |
| 2008 | |
| 2009 #ifdef DEBUG_XEMACS | |
| 2010 static EXTENT | |
| 2011 extent_e_first (Lisp_Object obj) | |
| 2012 { | |
| 2013 Extent_List *el = buffer_or_string_extent_list (obj); | |
| 2014 | |
| 2015 if (!el) | |
| 2016 return 0; | |
| 2017 return real_extent_at_forward (el, 0, 1); | |
| 2018 } | |
| 2019 #endif | |
| 2020 | |
| 2021 static EXTENT | |
| 2022 extent_next (EXTENT e) | |
| 2023 { | |
| 2024 Extent_List *el = extent_extent_list (e); | |
| 2025 int foundp; | |
| 2026 int pos = extent_list_locate (el, e, 0, &foundp); | |
| 2027 assert (foundp); | |
| 2028 return real_extent_at_forward (el, pos+1, 0); | |
| 2029 } | |
| 2030 | |
| 2031 #ifdef DEBUG_XEMACS | |
| 2032 static EXTENT | |
| 2033 extent_e_next (EXTENT e) | |
| 2034 { | |
| 2035 Extent_List *el = extent_extent_list (e); | |
| 2036 int foundp; | |
| 2037 int pos = extent_list_locate (el, e, 1, &foundp); | |
| 2038 assert (foundp); | |
| 2039 return real_extent_at_forward (el, pos+1, 1); | |
| 2040 } | |
| 2041 #endif | |
| 2042 | |
| 2043 static EXTENT | |
| 2044 extent_last (Lisp_Object obj) | |
| 2045 { | |
| 2046 Extent_List *el = buffer_or_string_extent_list (obj); | |
| 2047 | |
| 2048 if (!el) | |
| 2049 return 0; | |
| 2050 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 0); | |
| 2051 } | |
| 2052 | |
| 2053 #ifdef DEBUG_XEMACS | |
| 2054 static EXTENT | |
| 2055 extent_e_last (Lisp_Object obj) | |
| 2056 { | |
| 2057 Extent_List *el = buffer_or_string_extent_list (obj); | |
| 2058 | |
| 2059 if (!el) | |
| 2060 return 0; | |
| 2061 return real_extent_at_backward (el, extent_list_num_els (el) - 1, 1); | |
| 2062 } | |
| 2063 #endif | |
| 2064 | |
| 2065 static EXTENT | |
| 2066 extent_previous (EXTENT e) | |
| 2067 { | |
| 2068 Extent_List *el = extent_extent_list (e); | |
| 2069 int foundp; | |
| 2070 int pos = extent_list_locate (el, e, 0, &foundp); | |
| 2071 assert (foundp); | |
| 2072 return real_extent_at_backward (el, pos-1, 0); | |
| 2073 } | |
| 2074 | |
| 2075 #ifdef DEBUG_XEMACS | |
| 2076 static EXTENT | |
| 2077 extent_e_previous (EXTENT e) | |
| 2078 { | |
| 2079 Extent_List *el = extent_extent_list (e); | |
| 2080 int foundp; | |
| 2081 int pos = extent_list_locate (el, e, 1, &foundp); | |
| 2082 assert (foundp); | |
| 2083 return real_extent_at_backward (el, pos-1, 1); | |
| 2084 } | |
| 2085 #endif | |
| 2086 | |
| 2087 static void | |
| 2088 extent_attach (EXTENT extent) | |
| 2089 { | |
| 2090 Extent_List *el = extent_extent_list (extent); | |
| 2091 | |
| 2092 extent_list_insert (el, extent); | |
| 2093 soe_insert (extent_object (extent), extent); | |
| 2094 /* only this extent changed */ | |
| 826 | 2095 signal_extent_changed (extent, Qnil, -1, -1, 0); |
| 428 | 2096 } |
| 2097 | |
| 2098 static void | |
| 2099 extent_detach (EXTENT extent) | |
| 2100 { | |
| 2101 Extent_List *el; | |
| 2102 | |
| 2103 if (extent_detached_p (extent)) | |
| 2104 return; | |
| 2105 el = extent_extent_list (extent); | |
| 2106 | |
| 2107 /* call this before messing with the extent. */ | |
| 826 | 2108 signal_extent_changed (extent, Qnil, |
| 2109 extent_endpoint_byte (extent, 0), | |
| 2110 extent_endpoint_char (extent, 0), | |
| 2111 0); | |
| 428 | 2112 extent_list_delete (el, extent); |
| 2113 soe_delete (extent_object (extent), extent); | |
| 2114 set_extent_start (extent, -1); | |
| 2115 set_extent_end (extent, -1); | |
| 2116 } | |
| 2117 | |
| 2118 /* ------------------------------- */ | |
| 2119 /* map-extents et al. */ | |
| 2120 /* ------------------------------- */ | |
| 2121 | |
| 2122 /* Returns true iff map_extents() would visit the given extent. | |
| 2123 See the comments at map_extents() for info on the overlap rule. | |
| 2124 Assumes that all validation on the extent and buffer positions has | |
| 2125 already been performed (see Fextent_in_region_p ()). | |
| 2126 */ | |
| 2127 static int | |
| 826 | 2128 extent_in_region_p (EXTENT extent, Bytexpos from, Bytexpos to, |
| 428 | 2129 unsigned int flags) |
| 2130 { | |
| 2131 Lisp_Object obj = extent_object (extent); | |
| 2132 Endpoint_Index start, end, exs, exe; | |
| 2133 int start_open, end_open; | |
| 2134 unsigned int all_extents_flags = flags & ME_ALL_EXTENTS_MASK; | |
| 2135 unsigned int in_region_flags = flags & ME_IN_REGION_MASK; | |
| 2136 int retval; | |
| 2137 | |
| 2138 /* A zero-length region is treated as closed-closed. */ | |
| 2139 if (from == to) | |
| 2140 { | |
| 2141 flags |= ME_END_CLOSED; | |
| 2142 flags &= ~ME_START_OPEN; | |
| 2143 } | |
| 2144 | |
| 2145 /* So is a zero-length extent. */ | |
| 2146 if (extent_start (extent) == extent_end (extent)) | |
| 2147 start_open = 0, end_open = 0; | |
| 2148 /* `all_extents_flags' will almost always be zero. */ | |
| 2149 else if (all_extents_flags == 0) | |
| 2150 { | |
| 2151 start_open = extent_start_open_p (extent); | |
| 2152 end_open = extent_end_open_p (extent); | |
| 2153 } | |
| 2154 else | |
| 2155 switch (all_extents_flags) | |
| 2156 { | |
| 2157 case ME_ALL_EXTENTS_CLOSED: start_open = 0, end_open = 0; break; | |
| 2158 case ME_ALL_EXTENTS_OPEN: start_open = 1, end_open = 1; break; | |
| 2159 case ME_ALL_EXTENTS_CLOSED_OPEN: start_open = 0, end_open = 1; break; | |
| 2160 case ME_ALL_EXTENTS_OPEN_CLOSED: start_open = 1, end_open = 0; break; | |
| 2500 | 2161 default: ABORT(); return 0; |
| 428 | 2162 } |
| 2163 | |
| 826 | 2164 start = buffer_or_string_bytexpos_to_startind (obj, from, |
| 428 | 2165 flags & ME_START_OPEN); |
| 826 | 2166 end = buffer_or_string_bytexpos_to_endind (obj, to, |
| 2167 ! (flags & ME_END_CLOSED)); | |
| 2168 exs = memxpos_to_startind (extent_start (extent), start_open); | |
| 2169 exe = memxpos_to_endind (extent_end (extent), end_open); | |
| 428 | 2170 |
| 2171 /* It's easy to determine whether an extent lies *outside* the | |
| 2172 region -- just determine whether it's completely before | |
| 2173 or completely after the region. Reject all such extents, so | |
| 2174 we're now left with only the extents that overlap the region. | |
| 2175 */ | |
| 2176 | |
| 2177 if (exs > end || exe < start) | |
| 2178 return 0; | |
| 2179 | |
| 2180 /* See if any further restrictions are called for. */ | |
| 2181 /* in_region_flags will almost always be zero. */ | |
| 2182 if (in_region_flags == 0) | |
| 2183 retval = 1; | |
| 2184 else | |
| 2185 switch (in_region_flags) | |
| 2186 { | |
| 2187 case ME_START_IN_REGION: | |
| 2188 retval = start <= exs && exs <= end; break; | |
| 2189 case ME_END_IN_REGION: | |
| 2190 retval = start <= exe && exe <= end; break; | |
| 2191 case ME_START_AND_END_IN_REGION: | |
| 2192 retval = start <= exs && exe <= end; break; | |
| 2193 case ME_START_OR_END_IN_REGION: | |
| 2194 retval = (start <= exs && exs <= end) || (start <= exe && exe <= end); | |
| 2195 break; | |
| 2196 default: | |
| 2500 | 2197 ABORT(); return 0; |
| 428 | 2198 } |
| 2199 return flags & ME_NEGATE_IN_REGION ? !retval : retval; | |
| 2200 } | |
| 2201 | |
| 2202 struct map_extents_struct | |
| 2203 { | |
| 2204 Extent_List *el; | |
| 2205 Extent_List_Marker *mkr; | |
| 2206 EXTENT range; | |
| 2207 }; | |
| 2208 | |
| 2209 static Lisp_Object | |
| 2210 map_extents_unwind (Lisp_Object obj) | |
| 2211 { | |
| 2212 struct map_extents_struct *closure = | |
| 2213 (struct map_extents_struct *) get_opaque_ptr (obj); | |
| 2214 free_opaque_ptr (obj); | |
| 2215 if (closure->range) | |
| 2216 extent_detach (closure->range); | |
| 2217 if (closure->mkr) | |
| 2218 extent_list_delete_marker (closure->el, closure->mkr); | |
| 2219 return Qnil; | |
| 2220 } | |
| 2221 | |
| 2222 /* This is the guts of `map-extents' and the other functions that | |
| 2223 map over extents. In theory the operation of this function is | |
| 2224 simple: just figure out what extents we're mapping over, and | |
| 2225 call the function on each one of them in the range. Unfortunately | |
| 2226 there are a wide variety of things that the mapping function | |
| 2227 might do, and we have to be very tricky to avoid getting messed | |
| 2228 up. Furthermore, this function needs to be very fast (it is | |
| 2229 called multiple times every time text is inserted or deleted | |
| 2230 from a buffer), and so we can't always afford the overhead of | |
| 2231 dealing with all the possible things that the mapping function | |
| 2232 might do; thus, there are many flags that can be specified | |
| 2233 indicating what the mapping function might or might not do. | |
| 2234 | |
| 2235 The result of all this is that this is the most complicated | |
| 2236 function in this file. Change it at your own risk! | |
| 2237 | |
| 2238 A potential simplification to the logic below is to determine | |
| 2239 all the extents that the mapping function should be called on | |
| 2240 before any calls are actually made and save them in an array. | |
| 2241 That introduces its own complications, however (the array | |
| 2242 needs to be marked for garbage-collection, and a static array | |
| 2243 cannot be used because map_extents() needs to be reentrant). | |
| 2244 Furthermore, the results might be a little less sensible than | |
| 2245 the logic below. */ | |
| 2246 | |
| 2247 | |
| 2248 static void | |
| 826 | 2249 map_extents (Bytexpos from, Bytexpos to, map_extents_fun fn, |
| 2250 void *arg, Lisp_Object obj, EXTENT after, | |
| 2251 unsigned int flags) | |
| 2252 { | |
| 2253 Memxpos st, en; /* range we're mapping over */ | |
| 428 | 2254 EXTENT range = 0; /* extent for this, if ME_MIGHT_MODIFY_TEXT */ |
| 2255 Extent_List *el = 0; /* extent list we're iterating over */ | |
| 2256 Extent_List_Marker *posm = 0; /* marker for extent list, | |
| 2257 if ME_MIGHT_MODIFY_EXTENTS */ | |
| 2258 /* count and struct for unwind-protect, if ME_MIGHT_THROW */ | |
| 1292 | 2259 int count = specpdl_depth (); |
| 428 | 2260 struct map_extents_struct closure; |
| 1292 | 2261 PROFILE_DECLARE (); |
| 428 | 2262 |
| 2263 #ifdef ERROR_CHECK_EXTENTS | |
| 2264 assert (from <= to); | |
| 2265 assert (from >= buffer_or_string_absolute_begin_byte (obj) && | |
| 2266 from <= buffer_or_string_absolute_end_byte (obj) && | |
| 2267 to >= buffer_or_string_absolute_begin_byte (obj) && | |
| 2268 to <= buffer_or_string_absolute_end_byte (obj)); | |
| 2269 #endif | |
| 2270 | |
| 2271 if (after) | |
| 2272 { | |
| 2273 assert (EQ (obj, extent_object (after))); | |
| 2274 assert (!extent_detached_p (after)); | |
| 2275 } | |
| 2276 | |
| 2277 el = buffer_or_string_extent_list (obj); | |
| 1292 | 2278 if (!el || !extent_list_num_els (el)) |
| 428 | 2279 return; |
| 2280 el = 0; | |
| 2281 | |
| 1292 | 2282 PROFILE_RECORD_ENTERING_SECTION (QSin_map_extents_internal); |
| 2283 | |
| 826 | 2284 st = buffer_or_string_bytexpos_to_memxpos (obj, from); |
| 2285 en = buffer_or_string_bytexpos_to_memxpos (obj, to); | |
| 428 | 2286 |
| 2287 if (flags & ME_MIGHT_MODIFY_TEXT) | |
| 2288 { | |
| 2289 /* The mapping function might change the text in the buffer, | |
| 2290 so make an internal extent to hold the range we're mapping | |
| 2291 over. */ | |
| 2292 range = make_extent_detached (obj); | |
| 2293 set_extent_start (range, st); | |
| 2294 set_extent_end (range, en); | |
| 2295 range->flags.start_open = flags & ME_START_OPEN; | |
| 2296 range->flags.end_open = !(flags & ME_END_CLOSED); | |
| 2297 range->flags.internal = 1; | |
| 2298 range->flags.detachable = 0; | |
| 2299 extent_attach (range); | |
| 2300 } | |
| 2301 | |
| 2302 if (flags & ME_MIGHT_THROW) | |
| 2303 { | |
| 2304 /* The mapping function might throw past us so we need to use an | |
| 2305 unwind_protect() to eliminate the internal extent and range | |
| 2306 that we use. */ | |
| 2307 closure.range = range; | |
| 2308 closure.mkr = 0; | |
| 2309 record_unwind_protect (map_extents_unwind, | |
| 2310 make_opaque_ptr (&closure)); | |
| 2311 } | |
| 2312 | |
| 2313 /* ---------- Figure out where we start and what direction | |
| 2314 we move in. This is the trickiest part of this | |
| 2315 function. ---------- */ | |
| 2316 | |
| 2317 /* If ME_START_IN_REGION, ME_END_IN_REGION or ME_START_AND_END_IN_REGION | |
| 2318 was specified and ME_NEGATE_IN_REGION was not specified, our job | |
| 2319 is simple because of the presence of the display order and e-order. | |
| 2320 (Note that theoretically do something similar for | |
| 2321 ME_START_OR_END_IN_REGION, but that would require more trickiness | |
| 2322 than it's worth to avoid hitting the same extent twice.) | |
| 2323 | |
| 2324 In the general case, all the extents that overlap a range can be | |
| 2325 divided into two classes: those whose start position lies within | |
| 2326 the range (including the range's end but not including the | |
| 2327 range's start), and those that overlap the start position, | |
| 2328 i.e. those in the SOE for the start position. Or equivalently, | |
| 2329 the extents can be divided into those whose end position lies | |
| 2330 within the range and those in the SOE for the end position. Note | |
| 2331 that for this purpose we treat both the range and all extents in | |
| 2332 the buffer as closed on both ends. If this is not what the ME_ | |
| 2333 flags specified, then we've mapped over a few too many extents, | |
| 2334 but no big deal because extent_in_region_p() will filter them | |
| 2335 out. Ideally, we could move the SOE to the closer of the range's | |
| 2336 two ends and work forwards or backwards from there. However, in | |
| 2337 order to make the semantics of the AFTER argument work out, we | |
| 2338 have to always go in the same direction; so we choose to always | |
| 2339 move the SOE to the start position. | |
| 2340 | |
| 2341 When it comes time to do the SOE stage, we first call soe_move() | |
| 2342 so that the SOE gets set up. Note that the SOE might get | |
| 2343 changed while we are mapping over its contents. If we can | |
| 2344 guarantee that the SOE won't get moved to a new position, we | |
| 2345 simply need to put a marker in the SOE and we will track deletions | |
| 2346 and insertions of extents in the SOE. If the SOE might get moved, | |
| 2347 however (this would happen as a result of a recursive invocation | |
| 2348 of map-extents or a call to a redisplay-type function), then | |
| 2349 trying to track its changes is hopeless, so we just keep a | |
| 2350 marker to the first (or last) extent in the SOE and use that as | |
| 2351 our bound. | |
| 2352 | |
| 2353 Finally, if DONT_USE_SOE is defined, we don't use the SOE at all | |
| 2354 and instead just map from the beginning of the buffer. This is | |
| 2355 used for testing purposes and allows the SOE to be calculated | |
| 2356 using map_extents() instead of the other way around. */ | |
| 2357 | |
| 2358 { | |
| 2359 int range_flag; /* ME_*_IN_REGION subset of flags */ | |
| 2360 int do_soe_stage = 0; /* Are we mapping over the SOE? */ | |
| 2361 /* Does the range stage map over start or end positions? */ | |
| 2362 int range_endp; | |
| 2363 /* If type == 0, we include the start position in the range stage mapping. | |
| 2364 If type == 1, we exclude the start position in the range stage mapping. | |
| 2365 If type == 2, we begin at range_start_pos, an extent-list position. | |
| 2366 */ | |
| 2367 int range_start_type = 0; | |
| 2368 int range_start_pos = 0; | |
| 2369 int stage; | |
| 2370 | |
| 2371 range_flag = flags & ME_IN_REGION_MASK; | |
| 2372 if ((range_flag == ME_START_IN_REGION || | |
| 2373 range_flag == ME_START_AND_END_IN_REGION) && | |
| 2374 !(flags & ME_NEGATE_IN_REGION)) | |
| 2375 { | |
| 2376 /* map over start position in [range-start, range-end]. No SOE | |
| 2377 stage. */ | |
| 2378 range_endp = 0; | |
| 2379 } | |
| 2380 else if (range_flag == ME_END_IN_REGION && !(flags & ME_NEGATE_IN_REGION)) | |
| 2381 { | |
| 2382 /* map over end position in [range-start, range-end]. No SOE | |
| 2383 stage. */ | |
| 2384 range_endp = 1; | |
| 2385 } | |
| 2386 else | |
| 2387 { | |
| 2388 /* Need to include the SOE extents. */ | |
| 2389 #ifdef DONT_USE_SOE | |
| 2390 /* Just brute-force it: start from the beginning. */ | |
| 2391 range_endp = 0; | |
| 2392 range_start_type = 2; | |
| 2393 range_start_pos = 0; | |
| 2394 #else | |
| 2395 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents_force (obj); | |
| 2396 int numsoe; | |
| 2397 | |
| 2398 /* Move the SOE to the closer end of the range. This dictates | |
| 2399 whether we map over start positions or end positions. */ | |
| 2400 range_endp = 0; | |
| 2401 soe_move (obj, st); | |
| 2402 numsoe = extent_list_num_els (soe->extents); | |
| 2403 if (numsoe) | |
| 2404 { | |
| 2405 if (flags & ME_MIGHT_MOVE_SOE) | |
| 2406 { | |
| 2407 int foundp; | |
| 2408 /* Can't map over SOE, so just extend range to cover the | |
| 2409 SOE. */ | |
| 2410 EXTENT e = extent_list_at (soe->extents, 0, 0); | |
| 2411 range_start_pos = | |
| 2412 extent_list_locate (buffer_or_string_extent_list (obj), e, 0, | |
| 2413 &foundp); | |
| 2414 assert (foundp); | |
| 2415 range_start_type = 2; | |
| 2416 } | |
| 2417 else | |
| 2418 { | |
| 2419 /* We can map over the SOE. */ | |
| 2420 do_soe_stage = 1; | |
| 2421 range_start_type = 1; | |
| 2422 } | |
| 2423 } | |
| 2424 else | |
| 2425 { | |
| 2426 /* No extents in the SOE to map over, so we act just as if | |
| 2427 ME_START_IN_REGION or ME_END_IN_REGION was specified. | |
| 2428 RANGE_ENDP already specified so no need to do anything else. */ | |
| 2429 } | |
| 2430 } | |
| 2431 #endif | |
| 2432 | |
| 2433 /* ---------- Now loop over the extents. ---------- */ | |
| 2434 | |
| 2435 /* We combine the code for the two stages because much of it | |
| 2436 overlaps. */ | |
| 2437 for (stage = 0; stage < 2; stage++) | |
| 2438 { | |
| 2439 int pos = 0; /* Position in extent list */ | |
| 2440 | |
| 2441 /* First set up start conditions */ | |
| 2442 if (stage == 0) | |
| 2443 { /* The SOE stage */ | |
| 2444 if (!do_soe_stage) | |
| 2445 continue; | |
| 2446 el = buffer_or_string_stack_of_extents_force (obj)->extents; | |
| 2447 /* We will always be looping over start extents here. */ | |
| 2448 assert (!range_endp); | |
| 2449 pos = 0; | |
| 2450 } | |
| 2451 else | |
| 2452 { /* The range stage */ | |
| 2453 el = buffer_or_string_extent_list (obj); | |
| 2454 switch (range_start_type) | |
| 2455 { | |
| 2456 case 0: | |
| 2457 pos = extent_list_locate_from_pos (el, st, range_endp); | |
| 2458 break; | |
| 2459 case 1: | |
| 2460 pos = extent_list_locate_from_pos (el, st + 1, range_endp); | |
| 2461 break; | |
| 2462 case 2: | |
| 2463 pos = range_start_pos; | |
| 2464 break; | |
| 2465 } | |
| 2466 } | |
| 2467 | |
| 2468 if (flags & ME_MIGHT_MODIFY_EXTENTS) | |
| 2469 { | |
| 2470 /* Create a marker to track changes to the extent list */ | |
| 2471 if (posm) | |
| 2472 /* Delete the marker used in the SOE stage. */ | |
| 2473 extent_list_delete_marker | |
| 2474 (buffer_or_string_stack_of_extents_force (obj)->extents, posm); | |
| 2475 posm = extent_list_make_marker (el, pos, range_endp); | |
| 2476 /* tell the unwind function about the marker. */ | |
| 2477 closure.el = el; | |
| 2478 closure.mkr = posm; | |
| 2479 } | |
| 2480 | |
| 2481 /* Now loop! */ | |
| 2482 for (;;) | |
| 2483 { | |
| 2484 EXTENT e; | |
| 2485 Lisp_Object obj2; | |
| 2486 | |
| 2487 /* ----- update position in extent list | |
| 2488 and fetch next extent ----- */ | |
| 2489 | |
| 2490 if (posm) | |
| 2491 /* fetch POS again to track extent insertions or deletions */ | |
| 2492 pos = extent_list_marker_pos (el, posm); | |
| 2493 if (pos >= extent_list_num_els (el)) | |
| 2494 break; | |
| 2495 e = extent_list_at (el, pos, range_endp); | |
| 2496 pos++; | |
| 2497 if (posm) | |
| 2498 /* now point the marker to the next one we're going to process. | |
| 2499 This ensures graceful behavior if this extent is deleted. */ | |
| 2500 extent_list_move_marker (el, posm, pos); | |
| 2501 | |
| 2502 /* ----- deal with internal extents ----- */ | |
| 2503 | |
| 2504 if (extent_internal_p (e)) | |
| 2505 { | |
| 2506 if (!(flags & ME_INCLUDE_INTERNAL)) | |
| 2507 continue; | |
| 2508 else if (e == range) | |
| 2509 { | |
| 2510 /* We're processing internal extents and we've | |
| 2511 come across our own special range extent. | |
| 2512 (This happens only in adjust_extents*() and | |
| 2513 process_extents*(), which handle text | |
| 2514 insertion and deletion.) We need to omit | |
| 2515 processing of this extent; otherwise | |
| 2516 we will probably end up prematurely | |
| 2517 terminating this loop. */ | |
| 2518 continue; | |
| 2519 } | |
| 2520 } | |
| 2521 | |
| 2522 /* ----- deal with AFTER condition ----- */ | |
| 2523 | |
| 2524 if (after) | |
| 2525 { | |
| 2526 /* if e > after, then we can stop skipping extents. */ | |
| 2527 if (EXTENT_LESS (after, e)) | |
| 2528 after = 0; | |
| 2529 else /* otherwise, skip this extent. */ | |
| 2530 continue; | |
| 2531 } | |
| 2532 | |
| 2533 /* ----- stop if we're completely outside the range ----- */ | |
| 2534 | |
| 2535 /* fetch ST and EN again to track text insertions or deletions */ | |
| 2536 if (range) | |
| 2537 { | |
| 2538 st = extent_start (range); | |
| 2539 en = extent_end (range); | |
| 2540 } | |
| 2541 if (extent_endpoint (e, range_endp) > en) | |
| 2542 { | |
| 2543 /* Can't be mapping over SOE because all extents in | |
| 2544 there should overlap ST */ | |
| 2545 assert (stage == 1); | |
| 2546 break; | |
| 2547 } | |
| 2548 | |
| 2549 /* ----- Now actually call the function ----- */ | |
| 2550 | |
| 2551 obj2 = extent_object (e); | |
| 2552 if (extent_in_region_p (e, | |
| 826 | 2553 buffer_or_string_memxpos_to_bytexpos (obj2, |
| 2554 st), | |
| 2555 buffer_or_string_memxpos_to_bytexpos (obj2, | |
| 2556 en), | |
| 428 | 2557 flags)) |
| 2558 { | |
| 2559 if ((*fn)(e, arg)) | |
| 2560 { | |
| 2561 /* Function wants us to stop mapping. */ | |
| 2562 stage = 1; /* so outer for loop will terminate */ | |
| 2563 break; | |
| 2564 } | |
| 2565 } | |
| 2566 } | |
| 2567 } | |
| 2568 /* ---------- Finished looping. ---------- */ | |
| 2569 } | |
| 2570 | |
| 1292 | 2571 if (!(flags & ME_MIGHT_THROW)) |
| 428 | 2572 { |
| 2573 /* Delete them ourselves */ | |
| 2574 if (range) | |
| 2575 extent_detach (range); | |
| 2576 if (posm) | |
| 2577 extent_list_delete_marker (el, posm); | |
| 2578 } | |
| 1292 | 2579 |
| 2580 /* This deletes the range extent and frees the marker, if ME_MIGHT_THROW. */ | |
| 2581 unbind_to (count); | |
| 2582 | |
| 2583 PROFILE_RECORD_EXITING_SECTION (QSin_map_extents_internal); | |
| 428 | 2584 } |
| 2585 | |
| 2586 /* ------------------------------- */ | |
| 2587 /* adjust_extents() */ | |
| 2588 /* ------------------------------- */ | |
| 2589 | |
| 2590 /* Add AMOUNT to all extent endpoints in the range (FROM, TO]. This | |
| 2591 happens whenever the gap is moved or (under Mule) a character in a | |
| 2592 string is substituted for a different-length one. The reason for | |
| 2593 this is that extent endpoints behave just like markers (all memory | |
| 2594 indices do) and this adjustment correct for markers -- see | |
| 2595 adjust_markers(). Note that it is important that we visit all | |
| 2596 extent endpoints in the range, irrespective of whether the | |
| 2597 endpoints are open or closed. | |
| 2598 | |
| 2599 We could use map_extents() for this (and in fact the function | |
| 2600 was originally written that way), but the gap is in an incoherent | |
| 2601 state when this function is called and this function plays | |
| 2602 around with extent endpoints without detaching and reattaching | |
| 2603 the extents (this is provably correct and saves lots of time), | |
| 2604 so for safety we make it just look at the extent lists directly. */ | |
| 2605 | |
| 2606 void | |
| 826 | 2607 adjust_extents (Lisp_Object obj, Memxpos from, Memxpos to, int amount) |
| 428 | 2608 { |
| 2609 int endp; | |
| 2610 int pos; | |
| 2611 int startpos[2]; | |
| 2612 Extent_List *el; | |
| 2613 Stack_Of_Extents *soe; | |
| 2614 | |
| 2615 #ifdef ERROR_CHECK_EXTENTS | |
| 2616 sledgehammer_extent_check (obj); | |
| 2617 #endif | |
| 2618 el = buffer_or_string_extent_list (obj); | |
| 2619 | |
| 2620 if (!el || !extent_list_num_els(el)) | |
| 2621 return; | |
| 2622 | |
| 2623 /* IMPORTANT! Compute the starting positions of the extents to | |
| 2624 modify BEFORE doing any modification! Otherwise the starting | |
| 2625 position for the second time through the loop might get | |
| 2626 incorrectly calculated (I got bit by this bug real bad). */ | |
| 2627 startpos[0] = extent_list_locate_from_pos (el, from+1, 0); | |
| 2628 startpos[1] = extent_list_locate_from_pos (el, from+1, 1); | |
| 2629 for (endp = 0; endp < 2; endp++) | |
| 2630 { | |
| 2631 for (pos = startpos[endp]; pos < extent_list_num_els (el); | |
| 2632 pos++) | |
| 2633 { | |
| 2634 EXTENT e = extent_list_at (el, pos, endp); | |
| 2635 if (extent_endpoint (e, endp) > to) | |
| 2636 break; | |
| 2637 set_extent_endpoint (e, | |
| 2638 do_marker_adjustment (extent_endpoint (e, endp), | |
| 2639 from, to, amount), | |
| 2640 endp); | |
| 2641 } | |
| 2642 } | |
| 2643 | |
| 2644 /* The index for the buffer's SOE is a memory index and thus | |
| 2645 needs to be adjusted like a marker. */ | |
| 2646 soe = buffer_or_string_stack_of_extents (obj); | |
| 2647 if (soe && soe->pos >= 0) | |
| 2648 soe->pos = do_marker_adjustment (soe->pos, from, to, amount); | |
| 2649 } | |
| 2650 | |
| 2651 /* ------------------------------- */ | |
| 2652 /* adjust_extents_for_deletion() */ | |
| 2653 /* ------------------------------- */ | |
| 2654 | |
| 2655 struct adjust_extents_for_deletion_arg | |
| 2656 { | |
| 2657 EXTENT_dynarr *list; | |
| 2658 }; | |
| 2659 | |
| 2660 static int | |
| 2661 adjust_extents_for_deletion_mapper (EXTENT extent, void *arg) | |
| 2662 { | |
| 2663 struct adjust_extents_for_deletion_arg *closure = | |
| 2664 (struct adjust_extents_for_deletion_arg *) arg; | |
| 2665 | |
| 2666 Dynarr_add (closure->list, extent); | |
| 2667 return 0; /* continue mapping */ | |
| 2668 } | |
| 2669 | |
| 2670 /* For all extent endpoints in the range (FROM, TO], move them to the beginning | |
| 2671 of the new gap. Note that it is important that we visit all extent | |
| 2672 endpoints in the range, irrespective of whether the endpoints are open or | |
| 2673 closed. | |
| 2674 | |
| 2675 This function deals with weird stuff such as the fact that extents | |
| 2676 may get reordered. | |
| 2677 | |
| 2678 There is no string correspondent for this because you can't | |
| 2679 delete characters from a string. | |
| 2680 */ | |
| 2681 | |
| 2682 void | |
| 826 | 2683 adjust_extents_for_deletion (Lisp_Object object, Bytexpos from, |
| 2684 Bytexpos to, int gapsize, int numdel, | |
| 428 | 2685 int movegapsize) |
| 2686 { | |
| 2687 struct adjust_extents_for_deletion_arg closure; | |
| 2688 int i; | |
| 826 | 2689 Memxpos adjust_to = (Memxpos) (to + gapsize); |
| 428 | 2690 Bytecount amount = - numdel - movegapsize; |
| 826 | 2691 Memxpos oldsoe = 0, newsoe = 0; |
| 428 | 2692 Stack_Of_Extents *soe = buffer_or_string_stack_of_extents (object); |
| 2693 | |
| 2694 #ifdef ERROR_CHECK_EXTENTS | |
| 2695 sledgehammer_extent_check (object); | |
| 2696 #endif | |
| 2697 closure.list = Dynarr_new (EXTENT); | |
| 2698 | |
| 2699 /* We're going to be playing weird games below with extents and the SOE | |
| 2700 and such, so compute the list now of all the extents that we're going | |
| 2701 to muck with. If we do the mapping and adjusting together, things can | |
| 2702 get all screwed up. */ | |
| 2703 | |
| 826 | 2704 map_extents (from, to, adjust_extents_for_deletion_mapper, |
| 2705 (void *) &closure, object, 0, | |
| 2706 /* extent endpoints move like markers regardless | |
| 2707 of their open/closeness. */ | |
| 2708 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED | | |
| 2709 ME_START_OR_END_IN_REGION | ME_INCLUDE_INTERNAL); | |
| 428 | 2710 |
| 2711 /* | |
| 2712 Old and new values for the SOE's position. (It gets adjusted | |
| 2713 like a marker, just like extent endpoints.) | |
| 2714 */ | |
| 2715 | |
| 2716 if (soe) | |
| 2717 { | |
| 2718 oldsoe = soe->pos; | |
| 2719 if (soe->pos >= 0) | |
| 2720 newsoe = do_marker_adjustment (soe->pos, | |
| 2721 adjust_to, adjust_to, | |
| 2722 amount); | |
| 2723 else | |
| 2724 newsoe = soe->pos; | |
| 2725 } | |
| 2726 | |
| 2727 for (i = 0; i < Dynarr_length (closure.list); i++) | |
| 2728 { | |
| 2729 EXTENT extent = Dynarr_at (closure.list, i); | |
| 826 | 2730 Memxpos new_start = extent_start (extent); |
| 2731 Memxpos new_end = extent_end (extent); | |
| 428 | 2732 |
| 2733 /* do_marker_adjustment() will not adjust values that should not be | |
| 2734 adjusted. We're passing the same funky arguments to | |
| 2735 do_marker_adjustment() as buffer_delete_range() does. */ | |
| 2736 new_start = | |
| 2737 do_marker_adjustment (new_start, | |
| 2738 adjust_to, adjust_to, | |
| 2739 amount); | |
| 2740 new_end = | |
| 2741 do_marker_adjustment (new_end, | |
| 2742 adjust_to, adjust_to, | |
| 2743 amount); | |
| 2744 | |
| 2745 /* We need to be very careful here so that the SOE doesn't get | |
| 2746 corrupted. We are shrinking extents out of the deleted region | |
| 2747 and simultaneously moving the SOE's pos out of the deleted | |
| 2748 region, so the SOE should contain the same extents at the end | |
| 2749 as at the beginning. However, extents may get reordered | |
| 2750 by this process, so we have to operate by pulling the extents | |
| 2751 out of the buffer and SOE, changing their bounds, and then | |
| 2752 reinserting them. In order for the SOE not to get screwed up, | |
| 2753 we have to make sure that the SOE's pos points to its old | |
| 2754 location whenever we pull an extent out, and points to its | |
| 2755 new location whenever we put the extent back in. | |
| 2756 */ | |
| 2757 | |
| 2758 if (new_start != extent_start (extent) || | |
| 2759 new_end != extent_end (extent)) | |
| 2760 { | |
| 2761 extent_detach (extent); | |
| 2762 set_extent_start (extent, new_start); | |
| 2763 set_extent_end (extent, new_end); | |
| 2764 if (soe) | |
| 2765 soe->pos = newsoe; | |
| 2766 extent_attach (extent); | |
| 2767 if (soe) | |
| 2768 soe->pos = oldsoe; | |
| 2769 } | |
| 2770 } | |
| 2771 | |
| 2772 if (soe) | |
| 2773 soe->pos = newsoe; | |
| 2774 | |
| 2775 #ifdef ERROR_CHECK_EXTENTS | |
| 2776 sledgehammer_extent_check (object); | |
| 2777 #endif | |
| 2778 Dynarr_free (closure.list); | |
| 2779 } | |
| 2780 | |
| 2781 /* ------------------------------- */ | |
| 2782 /* extent fragments */ | |
| 2783 /* ------------------------------- */ | |
| 2784 | |
| 2785 /* Imagine that the buffer is divided up into contiguous, | |
| 2786 nonoverlapping "runs" of text such that no extent | |
| 2787 starts or ends within a run (extents that abut the | |
| 2788 run don't count). | |
| 2789 | |
| 2790 An extent fragment is a structure that holds data about | |
| 2791 the run that contains a particular buffer position (if | |
| 2792 the buffer position is at the junction of two runs, the | |
| 2793 run after the position is used) -- the beginning and | |
| 2794 end of the run, a list of all of the extents in that | |
| 2795 run, the "merged face" that results from merging all of | |
| 2796 the faces corresponding to those extents, the begin and | |
| 2797 end glyphs at the beginning of the run, etc. This is | |
| 2798 the information that redisplay needs in order to | |
| 2799 display this run. | |
| 2800 | |
| 2801 Extent fragments have to be very quick to update to | |
| 2802 a new buffer position when moving linearly through | |
| 2803 the buffer. They rely on the stack-of-extents code, | |
| 2804 which does the heavy-duty algorithmic work of determining | |
| 2805 which extents overly a particular position. */ | |
| 2806 | |
| 2807 /* This function returns the position of the beginning of | |
| 2808 the first run that begins after POS, or returns POS if | |
| 2809 there are no such runs. */ | |
| 2810 | |
| 826 | 2811 static Bytexpos |
| 2812 extent_find_end_of_run (Lisp_Object obj, Bytexpos pos, int outside_accessible) | |
| 428 | 2813 { |
| 2814 Extent_List *sel; | |
| 2815 Extent_List *bel = buffer_or_string_extent_list (obj); | |
| 826 | 2816 Bytexpos pos1, pos2; |
| 428 | 2817 int elind1, elind2; |
| 826 | 2818 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (obj, pos); |
| 2819 Bytexpos limit = outside_accessible ? | |
| 428 | 2820 buffer_or_string_absolute_end_byte (obj) : |
| 826 | 2821 buffer_or_string_accessible_end_byte (obj); |
| 2822 | |
| 2823 if (!bel || !extent_list_num_els (bel)) | |
| 428 | 2824 return limit; |
| 2825 | |
| 2826 sel = buffer_or_string_stack_of_extents_force (obj)->extents; | |
| 2827 soe_move (obj, mempos); | |
| 2828 | |
| 2829 /* Find the first start position after POS. */ | |
| 2830 elind1 = extent_list_locate_from_pos (bel, mempos+1, 0); | |
| 2831 if (elind1 < extent_list_num_els (bel)) | |
| 826 | 2832 pos1 = buffer_or_string_memxpos_to_bytexpos |
| 428 | 2833 (obj, extent_start (extent_list_at (bel, elind1, 0))); |
| 2834 else | |
| 2835 pos1 = limit; | |
| 2836 | |
| 2837 /* Find the first end position after POS. The extent corresponding | |
| 2838 to this position is either in the SOE or is greater than or | |
| 2839 equal to POS1, so we just have to look in the SOE. */ | |
| 2840 elind2 = extent_list_locate_from_pos (sel, mempos+1, 1); | |
| 2841 if (elind2 < extent_list_num_els (sel)) | |
| 826 | 2842 pos2 = buffer_or_string_memxpos_to_bytexpos |
| 428 | 2843 (obj, extent_end (extent_list_at (sel, elind2, 1))); |
| 2844 else | |
| 2845 pos2 = limit; | |
| 2846 | |
| 2847 return min (min (pos1, pos2), limit); | |
| 2848 } | |
| 2849 | |
| 826 | 2850 static Bytexpos |
| 2851 extent_find_beginning_of_run (Lisp_Object obj, Bytexpos pos, | |
| 428 | 2852 int outside_accessible) |
| 2853 { | |
| 2854 Extent_List *sel; | |
| 2855 Extent_List *bel = buffer_or_string_extent_list (obj); | |
| 826 | 2856 Bytexpos pos1, pos2; |
| 428 | 2857 int elind1, elind2; |
| 826 | 2858 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (obj, pos); |
| 2859 Bytexpos limit = outside_accessible ? | |
| 428 | 2860 buffer_or_string_absolute_begin_byte (obj) : |
| 826 | 2861 buffer_or_string_accessible_begin_byte (obj); |
| 428 | 2862 |
| 2863 if (!bel || !extent_list_num_els(bel)) | |
| 2864 return limit; | |
| 2865 | |
| 2866 sel = buffer_or_string_stack_of_extents_force (obj)->extents; | |
| 2867 soe_move (obj, mempos); | |
| 2868 | |
| 2869 /* Find the first end position before POS. */ | |
| 2870 elind1 = extent_list_locate_from_pos (bel, mempos, 1); | |
| 2871 if (elind1 > 0) | |
| 826 | 2872 pos1 = buffer_or_string_memxpos_to_bytexpos |
| 428 | 2873 (obj, extent_end (extent_list_at (bel, elind1 - 1, 1))); |
| 2874 else | |
| 2875 pos1 = limit; | |
| 2876 | |
| 2877 /* Find the first start position before POS. The extent corresponding | |
| 2878 to this position is either in the SOE or is less than or | |
| 2879 equal to POS1, so we just have to look in the SOE. */ | |
| 2880 elind2 = extent_list_locate_from_pos (sel, mempos, 0); | |
| 2881 if (elind2 > 0) | |
| 826 | 2882 pos2 = buffer_or_string_memxpos_to_bytexpos |
| 428 | 2883 (obj, extent_start (extent_list_at (sel, elind2 - 1, 0))); |
| 2884 else | |
| 2885 pos2 = limit; | |
| 2886 | |
| 2887 return max (max (pos1, pos2), limit); | |
| 2888 } | |
| 2889 | |
| 2890 struct extent_fragment * | |
| 2891 extent_fragment_new (Lisp_Object buffer_or_string, struct frame *frm) | |
| 2892 { | |
| 2893 struct extent_fragment *ef = xnew_and_zero (struct extent_fragment); | |
| 2894 | |
| 2895 ef->object = buffer_or_string; | |
| 2896 ef->frm = frm; | |
| 2897 ef->extents = Dynarr_new (EXTENT); | |
| 2898 ef->begin_glyphs = Dynarr_new (glyph_block); | |
| 2899 ef->end_glyphs = Dynarr_new (glyph_block); | |
| 2900 | |
| 2901 return ef; | |
| 2902 } | |
| 2903 | |
| 2904 void | |
| 2905 extent_fragment_delete (struct extent_fragment *ef) | |
| 2906 { | |
| 2907 Dynarr_free (ef->extents); | |
| 2908 Dynarr_free (ef->begin_glyphs); | |
| 2909 Dynarr_free (ef->end_glyphs); | |
|
4976
16112448d484
Rename xfree(FOO, TYPE) -> xfree(FOO)
Ben Wing <ben@xemacs.org>
parents:
4967
diff
changeset
|
2910 xfree (ef); |
| 428 | 2911 } |
| 2912 | |
| 2913 static int | |
| 2914 extent_priority_sort_function (const void *humpty, const void *dumpty) | |
| 2915 { | |
| 442 | 2916 const EXTENT foo = * (const EXTENT *) humpty; |
| 2917 const EXTENT bar = * (const EXTENT *) dumpty; | |
| 428 | 2918 if (extent_priority (foo) < extent_priority (bar)) |
| 2919 return -1; | |
| 2920 return extent_priority (foo) > extent_priority (bar); | |
| 2921 } | |
| 2922 | |
| 2923 static void | |
| 2924 extent_fragment_sort_by_priority (EXTENT_dynarr *extarr) | |
| 2925 { | |
| 2926 int i; | |
| 2927 | |
| 2928 /* Sort our copy of the stack by extent_priority. We use a bubble | |
| 2929 sort here because it's going to be faster than qsort() for small | |
| 2930 numbers of extents (less than 10 or so), and 99.999% of the time | |
| 2931 there won't ever be more extents than this in the stack. */ | |
| 2932 if (Dynarr_length (extarr) < 10) | |
| 2933 { | |
| 2934 for (i = 1; i < Dynarr_length (extarr); i++) | |
| 2935 { | |
| 2936 int j = i - 1; | |
| 2937 while (j >= 0 && | |
| 2938 (extent_priority (Dynarr_at (extarr, j)) > | |
| 2939 extent_priority (Dynarr_at (extarr, j+1)))) | |
| 2940 { | |
| 2941 EXTENT tmp = Dynarr_at (extarr, j); | |
| 2942 Dynarr_at (extarr, j) = Dynarr_at (extarr, j+1); | |
| 2943 Dynarr_at (extarr, j+1) = tmp; | |
| 2944 j--; | |
| 2945 } | |
| 2946 } | |
| 2947 } | |
| 2948 else | |
| 2949 /* But some loser programs mess up and may create a large number | |
| 2950 of extents overlapping the same spot. This will result in | |
| 2951 catastrophic behavior if we use the bubble sort above. */ | |
| 4967 | 2952 qsort (Dynarr_begin (extarr), Dynarr_length (extarr), |
| 428 | 2953 sizeof (EXTENT), extent_priority_sort_function); |
| 2954 } | |
| 2955 | |
| 2956 /* If PROP is the `invisible' property of an extent, | |
| 2957 this is 1 if the extent should be treated as invisible. */ | |
| 2958 | |
| 2959 #define EXTENT_PROP_MEANS_INVISIBLE(buf, prop) \ | |
| 2960 (EQ (buf->invisibility_spec, Qt) \ | |
| 2961 ? ! NILP (prop) \ | |
| 2962 : invisible_p (prop, buf->invisibility_spec)) | |
| 2963 | |
| 2964 /* If PROP is the `invisible' property of a extent, | |
| 2965 this is 1 if the extent should be treated as invisible | |
| 2966 and should have an ellipsis. */ | |
| 2967 | |
| 2968 #define EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS(buf, prop) \ | |
| 2969 (EQ (buf->invisibility_spec, Qt) \ | |
| 2970 ? 0 \ | |
| 2971 : invisible_ellipsis_p (prop, buf->invisibility_spec)) | |
| 2972 | |
| 2973 /* This is like a combination of memq and assq. | |
| 2974 Return 1 if PROPVAL appears as an element of LIST | |
| 2975 or as the car of an element of LIST. | |
| 2976 If PROPVAL is a list, compare each element against LIST | |
| 2977 in that way, and return 1 if any element of PROPVAL is found in LIST. | |
| 2978 Otherwise return 0. | |
| 2979 This function cannot quit. */ | |
| 2980 | |
| 2981 static int | |
| 2982 invisible_p (REGISTER Lisp_Object propval, Lisp_Object list) | |
| 2983 { | |
| 2984 REGISTER Lisp_Object tail, proptail; | |
| 2985 for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
| 2986 { | |
| 2987 REGISTER Lisp_Object tem; | |
| 2988 tem = XCAR (tail); | |
| 2989 if (EQ (propval, tem)) | |
| 2990 return 1; | |
| 2991 if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
| 2992 return 1; | |
| 2993 } | |
| 2994 if (CONSP (propval)) | |
| 2995 for (proptail = propval; CONSP (proptail); | |
| 2996 proptail = XCDR (proptail)) | |
| 2997 { | |
| 2998 Lisp_Object propelt; | |
| 2999 propelt = XCAR (proptail); | |
| 3000 for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
| 3001 { | |
| 3002 REGISTER Lisp_Object tem; | |
| 3003 tem = XCAR (tail); | |
| 3004 if (EQ (propelt, tem)) | |
| 3005 return 1; | |
| 3006 if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
| 3007 return 1; | |
| 3008 } | |
| 3009 } | |
| 3010 return 0; | |
| 3011 } | |
| 3012 | |
| 3013 /* Return 1 if PROPVAL appears as the car of an element of LIST | |
| 3014 and the cdr of that element is non-nil. | |
| 3015 If PROPVAL is a list, check each element of PROPVAL in that way, | |
| 3016 and the first time some element is found, | |
| 3017 return 1 if the cdr of that element is non-nil. | |
| 3018 Otherwise return 0. | |
| 3019 This function cannot quit. */ | |
| 3020 | |
| 3021 static int | |
| 3022 invisible_ellipsis_p (REGISTER Lisp_Object propval, Lisp_Object list) | |
| 3023 { | |
| 3024 REGISTER Lisp_Object tail, proptail; | |
| 3025 for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
| 3026 { | |
| 3027 REGISTER Lisp_Object tem; | |
| 3028 tem = XCAR (tail); | |
| 3029 if (CONSP (tem) && EQ (propval, XCAR (tem))) | |
| 3030 return ! NILP (XCDR (tem)); | |
| 3031 } | |
| 3032 if (CONSP (propval)) | |
| 3033 for (proptail = propval; CONSP (proptail); | |
| 3034 proptail = XCDR (proptail)) | |
| 3035 { | |
| 3036 Lisp_Object propelt; | |
| 3037 propelt = XCAR (proptail); | |
| 3038 for (tail = list; CONSP (tail); tail = XCDR (tail)) | |
| 3039 { | |
| 3040 REGISTER Lisp_Object tem; | |
| 3041 tem = XCAR (tail); | |
| 3042 if (CONSP (tem) && EQ (propelt, XCAR (tem))) | |
| 3043 return ! NILP (XCDR (tem)); | |
| 3044 } | |
| 3045 } | |
| 3046 return 0; | |
| 3047 } | |
| 3048 | |
| 3049 face_index | |
| 3050 extent_fragment_update (struct window *w, struct extent_fragment *ef, | |
| 826 | 3051 Bytexpos pos, Lisp_Object last_glyph) |
| 428 | 3052 { |
| 3053 int i; | |
| 819 | 3054 int seen_glyph = NILP (last_glyph) ? 1 : 0; |
| 428 | 3055 Extent_List *sel = |
| 3056 buffer_or_string_stack_of_extents_force (ef->object)->extents; | |
| 3057 EXTENT lhe = 0; | |
| 3058 struct extent dummy_lhe_extent; | |
| 826 | 3059 Memxpos mempos = buffer_or_string_bytexpos_to_memxpos (ef->object, pos); |
| 428 | 3060 |
| 3061 #ifdef ERROR_CHECK_EXTENTS | |
| 3062 assert (pos >= buffer_or_string_accessible_begin_byte (ef->object) | |
| 3063 && pos <= buffer_or_string_accessible_end_byte (ef->object)); | |
| 3064 #endif | |
| 3065 | |
| 3066 Dynarr_reset (ef->extents); | |
| 3067 Dynarr_reset (ef->begin_glyphs); | |
| 3068 Dynarr_reset (ef->end_glyphs); | |
| 3069 | |
| 3070 ef->previously_invisible = ef->invisible; | |
| 3071 if (ef->invisible) | |
| 3072 { | |
| 3073 if (ef->invisible_ellipses) | |
| 3074 ef->invisible_ellipses_already_displayed = 1; | |
| 3075 } | |
| 3076 else | |
| 3077 ef->invisible_ellipses_already_displayed = 0; | |
| 3078 ef->invisible = 0; | |
| 3079 ef->invisible_ellipses = 0; | |
| 3080 | |
| 3081 /* Set up the begin and end positions. */ | |
| 3082 ef->pos = pos; | |
| 3083 ef->end = extent_find_end_of_run (ef->object, pos, 0); | |
| 3084 | |
| 3085 /* Note that extent_find_end_of_run() already moved the SOE for us. */ | |
| 3086 /* soe_move (ef->object, mempos); */ | |
| 3087 | |
| 3088 /* Determine the begin glyphs at POS. */ | |
| 3089 for (i = 0; i < extent_list_num_els (sel); i++) | |
| 3090 { | |
| 3091 EXTENT e = extent_list_at (sel, i, 0); | |
| 3092 if (extent_start (e) == mempos && !NILP (extent_begin_glyph (e))) | |
| 3093 { | |
| 3094 Lisp_Object glyph = extent_begin_glyph (e); | |
| 4932 | 3095 if (seen_glyph) |
| 3096 { | |
| 3097 struct glyph_block gb; | |
| 3098 | |
| 3099 xzero (gb); | |
| 3100 gb.glyph = glyph; | |
| 3101 gb.extent = wrap_extent (e); | |
| 3102 Dynarr_add (ef->begin_glyphs, gb); | |
| 3103 } | |
| 819 | 3104 else if (EQ (glyph, last_glyph)) |
| 3105 seen_glyph = 1; | |
| 428 | 3106 } |
| 3107 } | |
| 3108 | |
| 3109 /* Determine the end glyphs at POS. */ | |
| 3110 for (i = 0; i < extent_list_num_els (sel); i++) | |
| 3111 { | |
| 3112 EXTENT e = extent_list_at (sel, i, 1); | |
| 3113 if (extent_end (e) == mempos && !NILP (extent_end_glyph (e))) | |
| 3114 { | |
| 3115 Lisp_Object glyph = extent_end_glyph (e); | |
| 4932 | 3116 if (seen_glyph) |
| 3117 { | |
| 3118 struct glyph_block gb; | |
| 3119 | |
| 3120 xzero (gb); | |
| 3121 gb.glyph = glyph; | |
| 3122 gb.extent = wrap_extent (e); | |
| 3123 Dynarr_add (ef->end_glyphs, gb); | |
| 3124 } | |
| 819 | 3125 else if (EQ (glyph, last_glyph)) |
| 3126 seen_glyph = 1; | |
| 428 | 3127 } |
| 3128 } | |
| 3129 | |
| 3130 /* We tried determining all the charsets used in the run here, | |
| 3131 but that fails even if we only do the current line -- display | |
| 3132 tables or non-printable characters might cause other charsets | |
| 3133 to be used. */ | |
| 3134 | |
| 3135 /* Determine whether the last-highlighted-extent is present. */ | |
| 3136 if (EXTENTP (Vlast_highlighted_extent)) | |
| 3137 lhe = XEXTENT (Vlast_highlighted_extent); | |
| 3138 | |
| 3139 /* Now add all extents that overlap the character after POS and | |
| 3140 have a non-nil face. Also check if the character is invisible. */ | |
| 3141 for (i = 0; i < extent_list_num_els (sel); i++) | |
| 3142 { | |
| 3143 EXTENT e = extent_list_at (sel, i, 0); | |
| 3144 if (extent_end (e) > mempos) | |
| 3145 { | |
| 3146 Lisp_Object invis_prop = extent_invisible (e); | |
| 3147 | |
| 3148 if (!NILP (invis_prop)) | |
| 3149 { | |
| 3150 if (!BUFFERP (ef->object)) | |
| 3151 /* #### no `string-invisibility-spec' */ | |
| 3152 ef->invisible = 1; | |
| 3153 else | |
| 3154 { | |
| 3155 if (!ef->invisible_ellipses_already_displayed && | |
| 3156 EXTENT_PROP_MEANS_INVISIBLE_WITH_ELLIPSIS | |
| 3157 (XBUFFER (ef->object), invis_prop)) | |
| 3158 { | |
| 3159 ef->invisible = 1; | |
| 3160 ef->invisible_ellipses = 1; | |
| 3161 } | |
| 3162 else if (EXTENT_PROP_MEANS_INVISIBLE | |
| 3163 (XBUFFER (ef->object), invis_prop)) | |
| 3164 ef->invisible = 1; | |
| 3165 } | |
| 3166 } | |
| 3167 | |
| 3168 /* Remember that one of the extents in the list might be our | |
| 3169 dummy extent representing the highlighting that is | |
| 3170 attached to some other extent that is currently | |
| 3171 mouse-highlighted. When an extent is mouse-highlighted, | |
| 3172 it is as if there are two extents there, of potentially | |
| 3173 different priorities: the extent being highlighted, with | |
| 3174 whatever face and priority it has; and an ephemeral | |
| 3175 extent in the `mouse-face' face with | |
| 3176 `mouse-highlight-priority'. | |
| 3177 */ | |
| 3178 | |
| 3179 if (!NILP (extent_face (e))) | |
| 3180 Dynarr_add (ef->extents, e); | |
| 3181 if (e == lhe) | |
| 3182 { | |
| 3183 Lisp_Object f; | |
| 3184 /* zeroing isn't really necessary; we only deref `priority' | |
| 3185 and `face' */ | |
| 3186 xzero (dummy_lhe_extent); | |
| 3187 set_extent_priority (&dummy_lhe_extent, | |
| 3188 mouse_highlight_priority); | |
| 3189 /* Need to break up the following expression, due to an */ | |
| 3190 /* error in the Digital UNIX 3.2g C compiler (Digital */ | |
| 3191 /* UNIX Compiler Driver 3.11). */ | |
| 3192 f = extent_mouse_face (lhe); | |
| 3193 extent_face (&dummy_lhe_extent) = f; | |
| 3194 Dynarr_add (ef->extents, &dummy_lhe_extent); | |
| 3195 } | |
| 3196 /* since we are looping anyway, we might as well do this here */ | |
| 3197 if ((!NILP(extent_initial_redisplay_function (e))) && | |
| 3198 !extent_in_red_event_p(e)) | |
| 3199 { | |
| 3200 Lisp_Object function = extent_initial_redisplay_function (e); | |
| 3201 Lisp_Object obj; | |
| 3202 | |
| 3203 /* printf ("initial redisplay function called!\n "); */ | |
| 3204 | |
| 3205 /* print_extent_2 (e); | |
| 3206 printf ("\n"); */ | |
| 3207 | |
| 3208 /* FIXME: One should probably inhibit the displaying of | |
| 3209 this extent to reduce flicker */ | |
| 793 | 3210 extent_in_red_event_p (e) = 1; |
| 428 | 3211 |
| 3212 /* call the function */ | |
| 793 | 3213 obj = wrap_extent (e); |
| 3214 if (!NILP (function)) | |
| 3215 Fenqueue_eval_event (function, obj); | |
| 428 | 3216 } |
| 3217 } | |
| 3218 } | |
| 3219 | |
| 3220 extent_fragment_sort_by_priority (ef->extents); | |
| 3221 | |
| 3222 /* Now merge the faces together into a single face. The code to | |
| 3223 do this is in faces.c because it involves manipulating faces. */ | |
| 3224 return get_extent_fragment_face_cache_index (w, ef); | |
| 3225 } | |
| 3226 | |
| 3227 | |
| 3228 /************************************************************************/ | |
| 3229 /* extent-object methods */ | |
| 3230 /************************************************************************/ | |
| 3231 | |
| 3232 /* These are the basic helper functions for handling the allocation of | |
| 3233 extent objects. They are similar to the functions for other | |
| 3234 lrecord objects. allocate_extent() is in alloc.c, not here. */ | |
| 3235 | |
| 3236 static Lisp_Object | |
| 3237 mark_extent (Lisp_Object obj) | |
| 3238 { | |
| 3239 struct extent *extent = XEXTENT (obj); | |
| 3240 | |
| 3241 mark_object (extent_object (extent)); | |
| 3242 mark_object (extent_no_chase_normal_field (extent, face)); | |
| 3243 return extent->plist; | |
| 3244 } | |
| 3245 | |
| 3246 static void | |
| 2286 | 3247 print_extent_1 (Lisp_Object obj, Lisp_Object printcharfun, |
| 3248 int UNUSED (escapeflag)) | |
| 428 | 3249 { |
| 3250 EXTENT ext = XEXTENT (obj); | |
| 3251 EXTENT anc = extent_ancestor (ext); | |
| 3252 Lisp_Object tail; | |
|
4952
19a72041c5ed
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4932
diff
changeset
|
3253 Ascbyte buf[64], *bp = buf; |
| 428 | 3254 |
| 3255 /* Retrieve the ancestor and use it, for faster retrieval of properties */ | |
| 3256 | |
| 3257 if (!NILP (extent_begin_glyph (anc))) *bp++ = '*'; | |
| 3258 *bp++ = (extent_start_open_p (anc) ? '(': '['); | |
| 3259 if (extent_detached_p (ext)) | |
| 3260 strcpy (bp, "detached"); | |
| 3261 else | |
| 826 | 3262 sprintf (bp, "%ld, %ld", |
| 819 | 3263 XINT (Fextent_start_position (obj)), |
| 3264 XINT (Fextent_end_position (obj))); | |
| 428 | 3265 bp += strlen (bp); |
| 3266 *bp++ = (extent_end_open_p (anc) ? ')': ']'); | |
| 3267 if (!NILP (extent_end_glyph (anc))) *bp++ = '*'; | |
| 3268 *bp++ = ' '; | |
| 3269 | |
| 3270 if (!NILP (extent_read_only (anc))) *bp++ = '%'; | |
| 3271 if (!NILP (extent_mouse_face (anc))) *bp++ = 'H'; | |
| 3272 if (extent_unique_p (anc)) *bp++ = 'U'; | |
| 3273 else if (extent_duplicable_p (anc)) *bp++ = 'D'; | |
| 3274 if (!NILP (extent_invisible (anc))) *bp++ = 'I'; | |
| 3275 | |
| 3276 if (!NILP (extent_read_only (anc)) || !NILP (extent_mouse_face (anc)) || | |
| 3277 extent_unique_p (anc) || | |
| 3278 extent_duplicable_p (anc) || !NILP (extent_invisible (anc))) | |
| 3279 *bp++ = ' '; | |
| 3280 *bp = '\0'; | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4932
diff
changeset
|
3281 write_ascstring (printcharfun, buf); |
| 428 | 3282 |
| 3283 tail = extent_plist_slot (anc); | |
| 3284 | |
| 3285 for (; !NILP (tail); tail = Fcdr (Fcdr (tail))) | |
| 3286 { | |
| 3287 Lisp_Object v = XCAR (XCDR (tail)); | |
| 3288 if (NILP (v)) continue; | |
| 800 | 3289 write_fmt_string_lisp (printcharfun, "%S ", 1, XCAR (tail)); |
| 428 | 3290 } |
| 3291 | |
| 800 | 3292 write_fmt_string (printcharfun, "0x%lx", (long) ext); |
| 428 | 3293 } |
| 3294 | |
| 3295 static void | |
| 3296 print_extent (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag) | |
| 3297 { | |
| 3298 if (escapeflag) | |
| 3299 { | |
| 442 | 3300 const char *title = ""; |
| 3301 const char *name = ""; | |
| 3302 const char *posttitle = ""; | |
| 428 | 3303 Lisp_Object obj2 = Qnil; |
| 3304 | |
| 3305 /* Destroyed extents have 't' in the object field, causing | |
| 2500 | 3306 extent_object() to ABORT (maybe). */ |
| 428 | 3307 if (EXTENT_LIVE_P (XEXTENT (obj))) |
| 3308 obj2 = extent_object (XEXTENT (obj)); | |
| 3309 | |
| 3310 if (NILP (obj2)) | |
| 3311 title = "no buffer"; | |
| 3312 else if (BUFFERP (obj2)) | |
| 3313 { | |
| 3314 if (BUFFER_LIVE_P (XBUFFER (obj2))) | |
| 3315 { | |
| 3316 title = "buffer "; | |
| 3317 name = (char *) XSTRING_DATA (XBUFFER (obj2)->name); | |
| 3318 } | |
| 3319 else | |
| 3320 { | |
| 3321 title = "Killed Buffer"; | |
| 3322 name = ""; | |
| 3323 } | |
| 3324 } | |
| 3325 else | |
| 3326 { | |
| 3327 assert (STRINGP (obj2)); | |
| 3328 title = "string \""; | |
| 3329 posttitle = "\""; | |
| 3330 name = (char *) XSTRING_DATA (obj2); | |
| 3331 } | |
| 3332 | |
| 3333 if (print_readably) | |
| 3334 { | |
| 3335 if (!EXTENT_LIVE_P (XEXTENT (obj))) | |
| 563 | 3336 printing_unreadable_object ("#<destroyed extent>"); |
| 428 | 3337 else |
| 563 | 3338 printing_unreadable_object ("#<extent 0x%lx>", |
| 428 | 3339 (long) XEXTENT (obj)); |
| 3340 } | |
| 3341 | |
| 3342 if (!EXTENT_LIVE_P (XEXTENT (obj))) | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4932
diff
changeset
|
3343 write_ascstring (printcharfun, "#<destroyed extent"); |
| 428 | 3344 else |
| 3345 { | |
|
4952
19a72041c5ed
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Ben Wing <ben@xemacs.org>
parents:
4932
diff
changeset
|
3346 write_ascstring (printcharfun, "#<extent "); |
| 428 | 3347 print_extent_1 (obj, printcharfun, escapeflag); |
|
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diff
changeset
|
3348 write_ascstring (printcharfun, extent_detached_p (XEXTENT (obj)) |
| 826 | 3349 ? " from " : " in "); |
| 800 | 3350 write_fmt_string (printcharfun, "%s%s%s", title, name, posttitle); |
| 428 | 3351 } |
| 3352 } | |
| 3353 else | |
| 3354 { | |
| 3355 if (print_readably) | |
| 563 | 3356 printing_unreadable_object ("#<extent>"); |
|
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|
3357 write_ascstring (printcharfun, "#<extent"); |
|
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|
3358 } |
|
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diff
changeset
|
3359 write_ascstring (printcharfun, ">"); |
| 428 | 3360 } |
| 3361 | |
| 3362 static int | |
| 3363 properties_equal (EXTENT e1, EXTENT e2, int depth) | |
| 3364 { | |
| 3365 /* When this function is called, all indirections have been followed. | |
| 3366 Thus, the indirection checks in the various macros below will not | |
| 3367 amount to anything, and could be removed. However, the time | |
| 3368 savings would probably not be significant. */ | |
| 3369 if (!(EQ (extent_face (e1), extent_face (e2)) && | |
| 3370 extent_priority (e1) == extent_priority (e2) && | |
| 3371 internal_equal (extent_begin_glyph (e1), extent_begin_glyph (e2), | |
| 3372 depth + 1) && | |
| 3373 internal_equal (extent_end_glyph (e1), extent_end_glyph (e2), | |
| 3374 depth + 1))) | |
| 3375 return 0; | |
| 3376 | |
| 3377 /* compare the bit flags. */ | |
| 3378 { | |
| 3379 /* The has_aux field should not be relevant. */ | |
| 3380 int e1_has_aux = e1->flags.has_aux; | |
| 3381 int e2_has_aux = e2->flags.has_aux; | |
| 3382 int value; | |
| 3383 | |
| 3384 e1->flags.has_aux = e2->flags.has_aux = 0; | |
| 3385 value = memcmp (&e1->flags, &e2->flags, sizeof (e1->flags)); | |
| 3386 e1->flags.has_aux = e1_has_aux; | |
| 3387 e2->flags.has_aux = e2_has_aux; | |
| 3388 if (value) | |
| 3389 return 0; | |
| 3390 } | |
| 3391 | |
| 3392 /* compare the random elements of the plists. */ | |
| 3393 return !plists_differ (extent_no_chase_plist (e1), | |
| 3394 extent_no_chase_plist (e2), | |
|
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parents:
4117
diff
changeset
|
3395 0, 0, depth + 1, 0); |
| 428 | 3396 } |
| 3397 | |
| 3398 static int | |
|
4906
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Ben Wing <ben@xemacs.org>
parents:
4117
diff
changeset
|
3399 extent_equal (Lisp_Object obj1, Lisp_Object obj2, int depth, |
|
6ef8256a020a
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diff
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|
3400 int UNUSED (foldcase)) |
| 428 | 3401 { |
| 3402 struct extent *e1 = XEXTENT (obj1); | |
| 3403 struct extent *e2 = XEXTENT (obj2); | |
| 3404 return | |
| 3405 (extent_start (e1) == extent_start (e2) && | |
| 3406 extent_end (e1) == extent_end (e2) && | |
| 3407 internal_equal (extent_object (e1), extent_object (e2), depth + 1) && | |
| 3408 properties_equal (extent_ancestor (e1), extent_ancestor (e2), | |
| 3409 depth)); | |
| 3410 } | |
| 3411 | |
| 665 | 3412 static Hashcode |
| 428 | 3413 extent_hash (Lisp_Object obj, int depth) |
| 3414 { | |
| 3415 struct extent *e = XEXTENT (obj); | |
| 3416 /* No need to hash all of the elements; that would take too long. | |
| 3417 Just hash the most common ones. */ | |
| 3418 return HASH3 (extent_start (e), extent_end (e), | |
| 3419 internal_hash (extent_object (e), depth + 1)); | |
| 3420 } | |
| 3421 | |
| 1204 | 3422 static const struct memory_description extent_description[] = { |
| 442 | 3423 { XD_LISP_OBJECT, offsetof (struct extent, object) }, |
| 3424 { XD_LISP_OBJECT, offsetof (struct extent, flags.face) }, | |
| 3425 { XD_LISP_OBJECT, offsetof (struct extent, plist) }, | |
| 3426 { XD_END } | |
| 3427 }; | |
| 3428 | |
| 428 | 3429 static Lisp_Object |
| 3430 extent_getprop (Lisp_Object obj, Lisp_Object prop) | |
| 3431 { | |
| 3432 return Fextent_property (obj, prop, Qunbound); | |
| 3433 } | |
| 3434 | |
| 3435 static int | |
| 3436 extent_putprop (Lisp_Object obj, Lisp_Object prop, Lisp_Object value) | |
| 3437 { | |
| 3438 Fset_extent_property (obj, prop, value); | |
| 3439 return 1; | |
| 3440 } | |
| 3441 | |
| 3442 static int | |
| 3443 extent_remprop (Lisp_Object obj, Lisp_Object prop) | |
| 3444 { | |
| 826 | 3445 Lisp_Object retval = Fset_extent_property (obj, prop, Qunbound); |
| 3446 if (UNBOUNDP (retval)) | |
| 3447 return -1; | |
| 3448 else if (!NILP (retval)) | |
| 3449 return 1; | |
| 3450 else | |
| 3451 return 0; | |
| 428 | 3452 } |
| 3453 | |
| 3454 static Lisp_Object | |
| 3455 extent_plist (Lisp_Object obj) | |
| 3456 { | |
| 3457 return Fextent_properties (obj); | |
| 3458 } | |
| 3459 | |
|
5124
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Ben Wing <ben@xemacs.org>
parents:
5120
diff
changeset
|
3460 DEFINE_DUMPABLE_FROB_BLOCK_GENERAL_LISP_OBJECT ("extent", extent, |
| 934 | 3461 mark_extent, |
| 3462 print_extent, | |
| 3463 /* NOTE: If you declare a | |
| 3464 finalization method here, | |
| 3465 it will NOT be called. | |
| 3466 Shaft city. */ | |
| 3467 0, | |
| 3468 extent_equal, extent_hash, | |
| 3469 extent_description, | |
| 3470 extent_getprop, extent_putprop, | |
| 3471 extent_remprop, extent_plist, | |
|
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5120
diff
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|
3472 0 /* no disksaver */, |
| 934 | 3473 struct extent); |
| 428 | 3474 |
| 3475 /************************************************************************/ | |
| 3476 /* basic extent accessors */ | |
| 3477 /************************************************************************/ | |
| 3478 | |
| 3479 /* These functions are for checking externally-passed extent objects | |
| 3480 and returning an extent's basic properties, which include the | |
| 3481 buffer the extent is associated with, the endpoints of the extent's | |
| 3482 range, the open/closed-ness of those endpoints, and whether the | |
| 3483 extent is detached. Manipulating these properties requires | |
| 3484 manipulating the ordered lists that hold extents; thus, functions | |
| 3485 to do that are in a later section. */ | |
| 3486 | |
| 3487 /* Given a Lisp_Object that is supposed to be an extent, make sure it | |
| 3488 is OK and return an extent pointer. Extents can be in one of four | |
| 3489 states: | |
| 3490 | |
| 3491 1) destroyed | |
| 3492 2) detached and not associated with a buffer | |
| 3493 3) detached and associated with a buffer | |
| 3494 4) attached to a buffer | |
| 3495 | |
| 3496 If FLAGS is 0, types 2-4 are allowed. If FLAGS is DE_MUST_HAVE_BUFFER, | |
| 3497 types 3-4 are allowed. If FLAGS is DE_MUST_BE_ATTACHED, only type 4 | |
| 3498 is allowed. | |
| 3499 */ | |
| 3500 | |
| 3501 static EXTENT | |
| 3502 decode_extent (Lisp_Object extent_obj, unsigned int flags) | |
| 3503 { | |
| 3504 EXTENT extent; | |
| 3505 Lisp_Object obj; | |
| 3506 | |
| 3507 CHECK_LIVE_EXTENT (extent_obj); | |
| 3508 extent = XEXTENT (extent_obj); | |
| 3509 obj = extent_object (extent); | |
| 3510 | |
| 3511 /* the following condition will fail if we're dealing with a freed extent */ | |
| 3512 assert (NILP (obj) || BUFFERP (obj) || STRINGP (obj)); | |
| 3513 | |
| 3514 if (flags & DE_MUST_BE_ATTACHED) | |
| 3515 flags |= DE_MUST_HAVE_BUFFER; | |
| 3516 | |
| 3517 /* if buffer is dead, then convert extent to have no buffer. */ | |
| 3518 if (BUFFERP (obj) && !BUFFER_LIVE_P (XBUFFER (obj))) | |
| 3519 obj = extent_object (extent) = Qnil; | |
| 3520 | |
| 3521 assert (!NILP (obj) || extent_detached_p (extent)); | |
| 3522 | |
| 3523 if ((NILP (obj) && (flags & DE_MUST_HAVE_BUFFER)) | |
| 3524 || (extent_detached_p (extent) && (flags & DE_MUST_BE_ATTACHED))) | |
| 3525 { | |
| 442 | 3526 invalid_argument ("extent doesn't belong to a buffer or string", |
| 3527 extent_obj); | |
| 428 | 3528 } |
| 3529 | |
| 3530 return extent; | |
| 3531 } | |
| 3532 | |
| 826 | 3533 /* Note that the returned value is a char position, not a byte position. */ |
| 428 | 3534 |
| 3535 static Lisp_Object | |
| 3536 extent_endpoint_external (Lisp_Object extent_obj, int endp) | |
| 3537 { | |
| 3538 EXTENT extent = decode_extent (extent_obj, 0); | |
| 3539 | |
| 3540 if (extent_detached_p (extent)) | |
| 3541 return Qnil; | |
| 3542 else | |
| 826 | 3543 return make_int (extent_endpoint_char (extent, endp)); |
| 428 | 3544 } |
| 3545 | |
| 3546 DEFUN ("extentp", Fextentp, 1, 1, 0, /* | |
| 3547 Return t if OBJECT is an extent. | |
| 3548 */ | |
| 3549 (object)) | |
| 3550 { | |
| 3551 return EXTENTP (object) ? Qt : Qnil; | |
| 3552 } | |
| 3553 | |
| 3554 DEFUN ("extent-live-p", Fextent_live_p, 1, 1, 0, /* | |
| 3555 Return t if OBJECT is an extent that has not been destroyed. | |
| 3556 */ | |
| 3557 (object)) | |
| 3558 { | |
| 3559 return EXTENTP (object) && EXTENT_LIVE_P (XEXTENT (object)) ? Qt : Qnil; | |
| 3560 } | |
| 3561 | |
| 3562 DEFUN ("extent-detached-p", Fextent_detached_p, 1, 1, 0, /* | |
| 3563 Return t if EXTENT is detached. | |
| 3564 */ | |
| 3565 (extent)) | |
| 3566 { | |
| 3567 return extent_detached_p (decode_extent (extent, 0)) ? Qt : Qnil; | |
| 3568 } | |
| 3569 | |
| 3570 DEFUN ("extent-object", Fextent_object, 1, 1, 0, /* | |
| 3571 Return object (buffer or string) that EXTENT refers to. | |
| 3572 */ | |
| 3573 (extent)) | |
| 3574 { | |
| 3575 return extent_object (decode_extent (extent, 0)); | |
| 3576 } | |
| 3577 | |
| 3578 DEFUN ("extent-start-position", Fextent_start_position, 1, 1, 0, /* | |
| 3579 Return start position of EXTENT, or nil if EXTENT is detached. | |
| 3580 */ | |
| 3581 (extent)) | |
| 3582 { | |
| 3583 return extent_endpoint_external (extent, 0); | |
| 3584 } | |
| 3585 | |
| 3586 DEFUN ("extent-end-position", Fextent_end_position, 1, 1, 0, /* | |
| 3587 Return end position of EXTENT, or nil if EXTENT is detached. | |
| 3588 */ | |
| 3589 (extent)) | |
| 3590 { | |
| 3591 return extent_endpoint_external (extent, 1); | |
| 3592 } | |
| 3593 | |
| 3594 DEFUN ("extent-length", Fextent_length, 1, 1, 0, /* | |
| 3595 Return length of EXTENT in characters. | |
| 3596 */ | |
| 3597 (extent)) | |
| 3598 { | |
| 3599 EXTENT e = decode_extent (extent, DE_MUST_BE_ATTACHED); | |
| 826 | 3600 return make_int (extent_endpoint_char (e, 1) |
| 3601 - extent_endpoint_char (e, 0)); | |
| 428 | 3602 } |
| 3603 | |
| 3604 DEFUN ("next-extent", Fnext_extent, 1, 1, 0, /* | |
| 3605 Find next extent after EXTENT. | |
| 3606 If EXTENT is a buffer return the first extent in the buffer; likewise | |
| 3607 for strings. | |
| 3608 Extents in a buffer are ordered in what is called the "display" | |
| 3609 order, which sorts by increasing start positions and then by *decreasing* | |
| 3610 end positions. | |
| 3611 If you want to perform an operation on a series of extents, use | |
| 3612 `map-extents' instead of this function; it is much more efficient. | |
| 3613 The primary use of this function should be to enumerate all the | |
| 3614 extents in a buffer. | |
| 3615 Note: The display order is not necessarily the order that `map-extents' | |
| 3616 processes extents in! | |
| 3617 */ | |
| 3618 (extent)) | |
| 3619 { | |
| 3620 EXTENT next; | |
| 3621 | |
| 3622 if (EXTENTP (extent)) | |
| 3623 next = extent_next (decode_extent (extent, DE_MUST_BE_ATTACHED)); | |
| 3624 else | |
| 3625 next = extent_first (decode_buffer_or_string (extent)); | |
| 3626 | |
| 3627 if (!next) | |
| 3628 return Qnil; | |
| 793 | 3629 return wrap_extent (next); |
| 428 | 3630 } |
| 3631 | |
| 3632 DEFUN ("previous-extent", Fprevious_extent, 1, 1, 0, /* | |
| 3633 Find last extent before EXTENT. | |
| 3634 If EXTENT is a buffer return the last extent in the buffer; likewise | |
| 3635 for strings. | |
| 3636 This function is analogous to `next-extent'. | |
| 3637 */ | |
| 3638 (extent)) | |
| 3639 { | |
| 3640 EXTENT prev; | |
| 3641 | |
| 3642 if (EXTENTP (extent)) | |
| 3643 prev = extent_previous (decode_extent (extent, DE_MUST_BE_ATTACHED)); | |
| 3644 else | |
| 3645 prev = extent_last (decode_buffer_or_string (extent)); | |
| 3646 | |
| 3647 if (!prev) | |
| 3648 return Qnil; | |
| 793 | 3649 return wrap_extent (prev); |
| 428 | 3650 } |
| 3651 | |
| 3652 #ifdef DEBUG_XEMACS | |
| 3653 | |
| 3654 DEFUN ("next-e-extent", Fnext_e_extent, 1, 1, 0, /* | |
| 3655 Find next extent after EXTENT using the "e" order. | |
| 3656 If EXTENT is a buffer return the first extent in the buffer; likewise | |
| 3657 for strings. | |
| 3658 */ | |
| 3659 (extent)) | |
| 3660 { | |
| 3661 EXTENT next; | |
| 3662 | |
| 3663 if (EXTENTP (extent)) | |
| 3664 next = extent_e_next (decode_extent (extent, DE_MUST_BE_ATTACHED)); | |
| 3665 else | |
| 3666 next = extent_e_first (decode_buffer_or_string (extent)); | |
| 3667 | |
| 3668 if (!next) | |
| 3669 return Qnil; | |
| 793 | 3670 return wrap_extent (next); |
| 428 | 3671 } |
| 3672 | |
| 3673 DEFUN ("previous-e-extent", Fprevious_e_extent, 1, 1, 0, /* | |
| 3674 Find last extent before EXTENT using the "e" order. | |
| 3675 If EXTENT is a buffer return the last extent in the buffer; likewise | |
| 3676 for strings. | |
| 3677 This function is analogous to `next-e-extent'. | |
| 3678 */ | |
| 3679 (extent)) | |
| 3680 { | |
| 3681 EXTENT prev; | |
| 3682 | |
| 3683 if (EXTENTP (extent)) | |
| 3684 prev = extent_e_previous (decode_extent (extent, DE_MUST_BE_ATTACHED)); | |
| 3685 else | |
| 3686 prev = extent_e_last (decode_buffer_or_string (extent)); | |
| 3687 | |
| 3688 if (!prev) | |
| 3689 return Qnil; | |
| 793 | 3690 return wrap_extent (prev); |
| 428 | 3691 } |
| 3692 | |
| 3693 #endif | |
| 3694 | |
| 3695 DEFUN ("next-extent-change", Fnext_extent_change, 1, 2, 0, /* | |
| 3696 Return the next position after POS where an extent begins or ends. | |
| 3697 If POS is at the end of the buffer or string, POS will be returned; | |
| 3698 otherwise a position greater than POS will always be returned. | |
| 444 | 3699 If OBJECT is nil, the current buffer is assumed. |
| 428 | 3700 */ |
| 3701 (pos, object)) | |
| 3702 { | |
| 3703 Lisp_Object obj = decode_buffer_or_string (object); | |
| 826 | 3704 Bytexpos xpos; |
| 3705 | |
| 3706 xpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE); | |
| 3707 xpos = extent_find_end_of_run (obj, xpos, 1); | |
| 3708 return make_int (buffer_or_string_bytexpos_to_charxpos (obj, xpos)); | |
| 428 | 3709 } |
| 3710 | |
| 3711 DEFUN ("previous-extent-change", Fprevious_extent_change, 1, 2, 0, /* | |
| 3712 Return the last position before POS where an extent begins or ends. | |
| 3713 If POS is at the beginning of the buffer or string, POS will be returned; | |
| 3714 otherwise a position less than POS will always be returned. | |
| 3715 If OBJECT is nil, the current buffer is assumed. | |
| 3716 */ | |
| 3717 (pos, object)) | |
| 3718 { | |
| 3719 Lisp_Object obj = decode_buffer_or_string (object); | |
| 826 | 3720 Bytexpos xpos; |
| 3721 | |
| 3722 xpos = get_buffer_or_string_pos_byte (obj, pos, GB_ALLOW_PAST_ACCESSIBLE); | |
| 3723 xpos = extent_find_beginning_of_run (obj, xpos, 1); | |
| 3724 return make_int (buffer_or_string_bytexpos_to_charxpos (obj, xpos)); | |
| 428 | 3725 } |
| 3726 | |
| 3727 | |
| 3728 /************************************************************************/ | |
| 3729 /* parent and children stuff */ | |
| 3730 /************************************************************************/ | |
| 3731 | |
| 3732 DEFUN ("extent-parent", Fextent_parent, 1, 1, 0, /* | |
| 3733 Return the parent (if any) of EXTENT. | |
| 3734 If an extent has a parent, it derives all its properties from that extent | |
| 3735 and has no properties of its own. (The only "properties" that the | |
| 3736 extent keeps are the buffer/string it refers to and the start and end | |
| 3737 points.) It is possible for an extent's parent to itself have a parent. | |
| 3738 */ | |
| 3739 (extent)) | |
| 3740 /* do I win the prize for the strangest split infinitive? */ | |
| 3741 { | |
| 3742 EXTENT e = decode_extent (extent, 0); | |
| 3743 return extent_parent (e); | |
| 3744 } | |
| 3745 | |
| 3746 DEFUN ("extent-children", Fextent_children, 1, 1, 0, /* | |
| 3747 Return a list of the children (if any) of EXTENT. | |
| 3748 The children of an extent are all those extents whose parent is that extent. | |
| 3749 This function does not recursively trace children of children. | |
| 3750 \(To do that, use `extent-descendants'.) | |
| 3751 */ | |
| 3752 (extent)) | |
| 3753 { | |
| 3754 EXTENT e = decode_extent (extent, 0); | |
| 3755 Lisp_Object children = extent_children (e); | |
| 3756 | |
| 3757 if (!NILP (children)) | |
| 3758 return Fcopy_sequence (XWEAK_LIST_LIST (children)); | |
| 3759 else | |
| 3760 return Qnil; | |
| 3761 } | |
| 3762 | |
| 3763 static void | |
| 3764 remove_extent_from_children_list (EXTENT e, Lisp_Object child) | |
| 3765 { | |
| 3766 Lisp_Object children = extent_children (e); | |
| 3767 | |
| 3768 #ifdef ERROR_CHECK_EXTENTS | |
| 3769 assert (!NILP (memq_no_quit (child, XWEAK_LIST_LIST (children)))); | |
| 3770 #endif | |
| 3771 XWEAK_LIST_LIST (children) = | |
| 3772 delq_no_quit (child, XWEAK_LIST_LIST (children)); | |
| 3773 } | |
| 3774 | |
| 3775 static void | |
| 3776 add_extent_to_children_list (EXTENT e, Lisp_Object child) | |
| 3777 { | |
| 3778 Lisp_Object children = extent_children (e); | |
| 3779 | |
| 3780 if (NILP (children)) | |
| 3781 { | |
| 3782 children = make_weak_list (WEAK_LIST_SIMPLE); | |
| 3783 set_extent_no_chase_aux_field (e, children, children); | |
| 3784 } | |
| 3785 | |
| 3786 #ifdef ERROR_CHECK_EXTENTS | |
| 3787 assert (NILP (memq_no_quit (child, XWEAK_LIST_LIST (children)))); | |
| 3788 #endif | |
| 3789 XWEAK_LIST_LIST (children) = Fcons (child, XWEAK_LIST_LIST (children)); | |
| 3790 } | |
| 3791 | |
| 826 | 3792 |
| 3793 static int | |
| 3794 compare_key_value_pairs (const void *humpty, const void *dumpty) | |
| 3795 { | |
| 3796 Lisp_Object_pair *foo = (Lisp_Object_pair *) humpty; | |
| 3797 Lisp_Object_pair *bar = (Lisp_Object_pair *) dumpty; | |
| 3798 if (EQ (foo->key, bar->key)) | |
| 3799 return 0; | |
| 3800 return !NILP (Fstring_lessp (foo->key, bar->key)) ? -1 : 1; | |
| 3801 } | |
| 3802 | |
| 428 | 3803 DEFUN ("set-extent-parent", Fset_extent_parent, 2, 2, 0, /* |
| 3804 Set the parent of EXTENT to PARENT (may be nil). | |
| 3805 See `extent-parent'. | |
| 3806 */ | |
| 3807 (extent, parent)) | |
| 3808 { | |
| 3809 EXTENT e = decode_extent (extent, 0); | |
| 3810 Lisp_Object cur_parent = extent_parent (e); | |
| 3811 Lisp_Object rest; | |
| 3812 | |
| 793 | 3813 extent = wrap_extent (e); |
| 428 | 3814 if (!NILP (parent)) |
| 3815 CHECK_LIVE_EXTENT (parent); | |
| 3816 if (EQ (parent, cur_parent)) | |
| 3817 return Qnil; | |
| 3818 for (rest = parent; !NILP (rest); rest = extent_parent (XEXTENT (rest))) | |
| 3819 if (EQ (rest, extent)) | |
| 563 | 3820 signal_error (Qinvalid_change, |
| 442 | 3821 "Circular parent chain would result", |
| 3822 extent); | |
| 428 | 3823 if (NILP (parent)) |
| 3824 { | |
| 3825 remove_extent_from_children_list (XEXTENT (cur_parent), extent); | |
| 3826 set_extent_no_chase_aux_field (e, parent, Qnil); | |
| 3827 e->flags.has_parent = 0; | |
| 3828 } | |
| 3829 else | |
| 3830 { | |
| 3831 add_extent_to_children_list (XEXTENT (parent), extent); | |
| 3832 set_extent_no_chase_aux_field (e, parent, parent); | |
| 3833 e->flags.has_parent = 1; | |
| 3834 } | |
| 3835 /* changing the parent also changes the properties of all children. */ | |
| 3836 { | |
| 826 | 3837 Lisp_Object_pair_dynarr *oldprops, *newprops; |
| 3838 int i, orignewlength; | |
| 3839 | |
| 3840 /* perhaps there's a smarter way, but the following will work, | |
| 3841 and it's O(N*log N): | |
| 3842 | |
| 3843 (1) get the old props. | |
| 3844 (2) get the new props. | |
| 3845 (3) sort both. | |
| 3846 (4) loop through old props; if key not in new, add it, with value | |
| 3847 Qunbound. | |
| 3848 (5) vice-versa for new props. | |
| 3849 (6) sort both again. | |
| 3850 (7) now we have identical lists of keys; we run through and compare | |
| 3851 the values. | |
| 3852 | |
| 3853 Of course in reality the number of properties will be low, so | |
| 3854 an N^2 algorithm wouldn't be a problem, but the stuff below is just | |
| 3855 as easy to write given the existence of qsort and bsearch. | |
| 3856 */ | |
| 3857 | |
| 3858 oldprops = Dynarr_new (Lisp_Object_pair); | |
| 3859 newprops = Dynarr_new (Lisp_Object_pair); | |
| 3860 if (!NILP (cur_parent)) | |
| 3861 extent_properties (XEXTENT (cur_parent), oldprops); | |
| 3862 if (!NILP (parent)) | |
| 3863 extent_properties (XEXTENT (parent), newprops); | |
| 3864 | |
| 4967 | 3865 qsort (Dynarr_begin (oldprops), Dynarr_length (oldprops), |
| 826 | 3866 sizeof (Lisp_Object_pair), compare_key_value_pairs); |
| 4967 | 3867 qsort (Dynarr_begin (newprops), Dynarr_length (newprops), |
| 826 | 3868 sizeof (Lisp_Object_pair), compare_key_value_pairs); |
| 3869 orignewlength = Dynarr_length (newprops); | |
| 3870 for (i = 0; i < Dynarr_length (oldprops); i++) | |
| 3871 { | |
| 4967 | 3872 if (!bsearch (Dynarr_atp (oldprops, i), Dynarr_begin (newprops), |
| 826 | 3873 Dynarr_length (newprops), sizeof (Lisp_Object_pair), |
| 3874 compare_key_value_pairs)) | |
| 3875 { | |
| 3025 | 3876 Lisp_Object_pair new_; |
| 3877 new_.key = Dynarr_at (oldprops, i).key; | |
| 3878 new_.value = Qunbound; | |
| 3879 Dynarr_add (newprops, new_); | |
| 826 | 3880 } |
| 3881 } | |
| 3882 for (i = 0; i < orignewlength; i++) | |
| 3883 { | |
| 859 | 3884 if (!Dynarr_length (oldprops) || !bsearch (Dynarr_atp (newprops, i), |
| 4967 | 3885 Dynarr_begin (oldprops), |
| 859 | 3886 Dynarr_length (oldprops), |
| 3887 sizeof (Lisp_Object_pair), | |
| 3888 compare_key_value_pairs)) | |
| 826 | 3889 { |
| 3025 | 3890 Lisp_Object_pair new_; |
| 3891 new_.key = Dynarr_at (newprops, i).key; | |
| 3892 new_.value = Qunbound; | |
| 3893 Dynarr_add (oldprops, new_); | |
| 826 | 3894 } |
| 3895 } | |
| 4967 | 3896 qsort (Dynarr_begin (oldprops), Dynarr_length (oldprops), |
| 826 | 3897 sizeof (Lisp_Object_pair), compare_key_value_pairs); |
| 4967 | 3898 qsort (Dynarr_begin (newprops), Dynarr_length (newprops), |
| 826 | 3899 sizeof (Lisp_Object_pair), compare_key_value_pairs); |
| 3900 for (i = 0; i < Dynarr_length (oldprops); i++) | |
| 3901 { | |
| 3902 assert (EQ (Dynarr_at (oldprops, i).key, Dynarr_at (newprops, i).key)); | |
| 3903 if (!EQ (Dynarr_at (oldprops, i).value, Dynarr_at (newprops, i).value)) | |
| 3904 signal_extent_property_changed (e, Dynarr_at (oldprops, i).key, 1); | |
| 3905 } | |
| 3906 | |
| 3907 Dynarr_free (oldprops); | |
| 3908 Dynarr_free (newprops); | |
| 3909 #if 0 | |
| 3910 { | |
| 428 | 3911 int old_invis = (!NILP (cur_parent) && |
| 3912 !NILP (extent_invisible (XEXTENT (cur_parent)))); | |
| 3913 int new_invis = (!NILP (parent) && | |
| 3914 !NILP (extent_invisible (XEXTENT (parent)))); | |
| 3915 | |
| 3916 extent_maybe_changed_for_redisplay (e, 1, new_invis != old_invis); | |
| 3917 } | |
| 826 | 3918 #endif /* 0 */ |
| 3919 } | |
| 428 | 3920 return Qnil; |
| 3921 } | |
| 3922 | |
| 3923 | |
| 3924 /************************************************************************/ | |
| 3925 /* basic extent mutators */ | |
| 3926 /************************************************************************/ | |
| 3927 | |
| 3928 /* Note: If you track non-duplicable extents by undo, you'll get bogus | |
| 3929 undo records for transient extents via update-extent. | |
| 3930 For example, query-replace will do this. | |
| 3931 */ | |
| 3932 | |
| 3933 static void | |
| 826 | 3934 set_extent_endpoints_1 (EXTENT extent, Memxpos start, Memxpos end) |
| 428 | 3935 { |
| 3936 #ifdef ERROR_CHECK_EXTENTS | |
| 3937 Lisp_Object obj = extent_object (extent); | |
| 3938 | |
| 3939 assert (start <= end); | |
| 3940 if (BUFFERP (obj)) | |
| 3941 { | |
| 665 | 3942 assert (valid_membpos_p (XBUFFER (obj), start)); |
| 3943 assert (valid_membpos_p (XBUFFER (obj), end)); | |
| 428 | 3944 } |
| 3945 #endif | |
| 3946 | |
| 3947 /* Optimization: if the extent is already where we want it to be, | |
| 3948 do nothing. */ | |
| 3949 if (!extent_detached_p (extent) && extent_start (extent) == start && | |
| 3950 extent_end (extent) == end) | |
| 3951 return; | |
| 3952 | |
| 3953 if (extent_detached_p (extent)) | |
| 3954 { | |
| 3955 if (extent_duplicable_p (extent)) | |
| 3956 { | |
| 793 | 3957 Lisp_Object extent_obj = wrap_extent (extent); |
| 3958 | |
| 428 | 3959 record_extent (extent_obj, 1); |
| 3960 } | |
| 3961 } | |
| 3962 else | |
| 3963 extent_detach (extent); | |
| 3964 | |
| 3965 set_extent_start (extent, start); | |
| 3966 set_extent_end (extent, end); | |
| 3967 extent_attach (extent); | |
| 3968 } | |
| 3969 | |
| 3970 /* Set extent's endpoints to S and E, and put extent in buffer or string | |
| 3971 OBJECT. (If OBJECT is nil, do not change the extent's object.) */ | |
| 3972 | |
| 3973 void | |
| 826 | 3974 set_extent_endpoints (EXTENT extent, Bytexpos s, Bytexpos e, |
| 3975 Lisp_Object object) | |
| 3976 { | |
| 3977 Memxpos start, end; | |
| 428 | 3978 |
| 3979 if (NILP (object)) | |
| 3980 { | |
| 3981 object = extent_object (extent); | |
| 3982 assert (!NILP (object)); | |
| 3983 } | |
| 3984 else if (!EQ (object, extent_object (extent))) | |
| 3985 { | |
| 3986 extent_detach (extent); | |
| 3987 extent_object (extent) = object; | |
| 3988 } | |
| 3989 | |
| 3990 start = s < 0 ? extent_start (extent) : | |
| 826 | 3991 buffer_or_string_bytexpos_to_memxpos (object, s); |
| 428 | 3992 end = e < 0 ? extent_end (extent) : |
| 826 | 3993 buffer_or_string_bytexpos_to_memxpos (object, e); |
| 428 | 3994 set_extent_endpoints_1 (extent, start, end); |
| 3995 } | |
| 3996 | |
| 3997 static void | |
| 3998 set_extent_openness (EXTENT extent, int start_open, int end_open) | |
| 3999 { | |
| 4000 if (start_open != -1) | |
| 826 | 4001 { |
| 4002 extent_start_open_p (extent) = start_open; | |
| 4003 signal_extent_property_changed (extent, Qstart_open, 1); | |
| 4004 } | |
| 428 | 4005 if (end_open != -1) |
| 826 | 4006 { |
| 4007 extent_end_open_p (extent) = end_open; | |
| 4008 signal_extent_property_changed (extent, Qend_open, 1); | |
| 4009 } | |
| 428 | 4010 } |
| 4011 | |
| 4012 static EXTENT | |
| 826 | 4013 make_extent (Lisp_Object object, Bytexpos from, Bytexpos to) |
| 428 | 4014 { |
| 4015 EXTENT extent; | |
| 4016 | |
| 4017 extent = make_extent_detached (object); | |
| 4018 set_extent_endpoints (extent, from, to, Qnil); | |
| 4019 return extent; | |
| 4020 } | |
| 4021 | |
| 826 | 4022 /* Copy ORIGINAL, changing it to span FROM,TO in OBJECT. */ |
| 4023 | |
| 428 | 4024 static EXTENT |
| 826 | 4025 copy_extent (EXTENT original, Bytexpos from, Bytexpos to, Lisp_Object object) |
| 428 | 4026 { |
| 4027 EXTENT e; | |
| 4028 | |
| 4029 e = make_extent_detached (object); | |
| 4030 if (from >= 0) | |
| 4031 set_extent_endpoints (e, from, to, Qnil); | |
| 4032 | |
| 4033 e->plist = Fcopy_sequence (original->plist); | |
| 4034 memcpy (&e->flags, &original->flags, sizeof (e->flags)); | |
| 4035 if (e->flags.has_aux) | |
| 4036 { | |
| 4037 /* also need to copy the aux struct. It won't work for | |
| 4038 this extent to share the same aux struct as the original | |
| 4039 one. */ | |
|
5127
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|
4040 Lisp_Object ea = ALLOC_NORMAL_LISP_OBJECT (extent_auxiliary); |
|
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|
4041 |
|
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|
4042 copy_lisp_object (ea, XCAR (original->plist)); |
|
5117
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|
4043 XCAR (e->plist) = ea; |
| 428 | 4044 } |
| 4045 | |
| 4046 { | |
| 4047 /* we may have just added another child to the parent extent. */ | |
| 4048 Lisp_Object parent = extent_parent (e); | |
| 4049 if (!NILP (parent)) | |
| 4050 { | |
| 793 | 4051 Lisp_Object extent = wrap_extent (e); |
| 4052 | |
| 428 | 4053 add_extent_to_children_list (XEXTENT (parent), extent); |
| 4054 } | |
| 4055 } | |
| 4056 | |
| 4057 return e; | |
| 4058 } | |
| 4059 | |
| 4060 static void | |
| 4061 destroy_extent (EXTENT extent) | |
| 4062 { | |
| 4063 Lisp_Object rest, nextrest, children; | |
| 4064 Lisp_Object extent_obj; | |
| 4065 | |
| 4066 if (!extent_detached_p (extent)) | |
| 4067 extent_detach (extent); | |
| 4068 /* disassociate the extent from its children and parent */ | |
| 4069 children = extent_children (extent); | |
| 4070 if (!NILP (children)) | |
| 4071 { | |
| 4072 LIST_LOOP_DELETING (rest, nextrest, XWEAK_LIST_LIST (children)) | |
| 4073 Fset_extent_parent (XCAR (rest), Qnil); | |
| 4074 } | |
| 793 | 4075 extent_obj = wrap_extent (extent); |
| 428 | 4076 Fset_extent_parent (extent_obj, Qnil); |
| 4077 /* mark the extent as destroyed */ | |
| 4078 extent_object (extent) = Qt; | |
| 4079 } | |
| 4080 | |
| 4081 DEFUN ("make-extent", Fmake_extent, 2, 3, 0, /* | |
| 4082 Make an extent for the range [FROM, TO) in BUFFER-OR-STRING. | |
| 4083 BUFFER-OR-STRING defaults to the current buffer. Insertions at point | |
| 4084 TO will be outside of the extent; insertions at FROM will be inside the | |
| 4085 extent, causing the extent to grow. (This is the same way that markers | |
| 4086 behave.) You can change the behavior of insertions at the endpoints | |
| 4087 using `set-extent-property'. The extent is initially detached if both | |
| 4088 FROM and TO are nil, and in this case BUFFER-OR-STRING defaults to nil, | |
| 4089 meaning the extent is in no buffer and no string. | |
| 4090 */ | |
| 4091 (from, to, buffer_or_string)) | |
| 4092 { | |
| 4093 Lisp_Object extent_obj; | |
| 4094 Lisp_Object obj; | |
| 4095 | |
| 4096 obj = decode_buffer_or_string (buffer_or_string); | |
| 4097 if (NILP (from) && NILP (to)) | |
| 4098 { | |
| 4099 if (NILP (buffer_or_string)) | |
| 4100 obj = Qnil; | |
| 793 | 4101 extent_obj = wrap_extent (make_extent_detached (obj)); |
| 428 | 4102 } |
| 4103 else | |
| 4104 { | |
| 826 | 4105 Bytexpos start, end; |
| 428 | 4106 |
| 4107 get_buffer_or_string_range_byte (obj, from, to, &start, &end, | |
| 4108 GB_ALLOW_PAST_ACCESSIBLE); | |
| 826 | 4109 extent_obj = wrap_extent (make_extent (obj, start, end)); |
| 428 | 4110 } |
| 4111 return extent_obj; | |
| 4112 } | |
| 4113 | |
| 4114 DEFUN ("copy-extent", Fcopy_extent, 1, 2, 0, /* | |
| 4115 Make a copy of EXTENT. It is initially detached. | |
| 4116 Optional argument BUFFER-OR-STRING defaults to EXTENT's buffer or string. | |
| 4117 */ | |
| 4118 (extent, buffer_or_string)) | |
| 4119 { | |
| 4120 EXTENT ext = decode_extent (extent, 0); | |
| 4121 | |
| 4122 if (NILP (buffer_or_string)) | |
| 4123 buffer_or_string = extent_object (ext); | |
| 4124 else | |
| 4125 buffer_or_string = decode_buffer_or_string (buffer_or_string); | |
| 4126 | |
| 793 | 4127 return wrap_extent (copy_extent (ext, -1, -1, buffer_or_string)); |
| 428 | 4128 } |
| 4129 | |
| 4130 DEFUN ("delete-extent", Fdelete_extent, 1, 1, 0, /* | |
| 4131 Remove EXTENT from its buffer and destroy it. | |
| 4132 This does not modify the buffer's text, only its display properties. | |
| 4133 The extent cannot be used thereafter. | |
| 4134 */ | |
| 4135 (extent)) | |
| 4136 { | |
| 4137 EXTENT ext; | |
| 4138 | |
| 4139 /* We do not call decode_extent() here because already-destroyed | |
| 4140 extents are OK. */ | |
| 4141 CHECK_EXTENT (extent); | |
| 4142 ext = XEXTENT (extent); | |
| 4143 | |
| 4144 if (!EXTENT_LIVE_P (ext)) | |
| 4145 return Qnil; | |
| 4146 destroy_extent (ext); | |
| 4147 return Qnil; | |
| 4148 } | |
| 4149 | |
| 4150 DEFUN ("detach-extent", Fdetach_extent, 1, 1, 0, /* | |
| 4151 Remove EXTENT from its buffer in such a way that it can be re-inserted. | |
| 4152 An extent is also detached when all of its characters are all killed by a | |
| 4153 deletion, unless its `detachable' property has been unset. | |
| 4154 | |
| 4155 Extents which have the `duplicable' attribute are tracked by the undo | |
| 4156 mechanism. Detachment via `detach-extent' and string deletion is recorded, | |
| 4157 as is attachment via `insert-extent' and string insertion. Extent motion, | |
| 4158 face changes, and attachment via `make-extent' and `set-extent-endpoints' | |
| 4159 are not recorded. This means that extent changes which are to be undo-able | |
| 4160 must be performed by character editing, or by insertion and detachment of | |
| 4161 duplicable extents. | |
| 4162 */ | |
| 4163 (extent)) | |
| 4164 { | |
| 4165 EXTENT ext = decode_extent (extent, 0); | |
| 4166 | |
| 4167 if (extent_detached_p (ext)) | |
| 4168 return extent; | |
| 4169 if (extent_duplicable_p (ext)) | |
| 4170 record_extent (extent, 0); | |
| 4171 extent_detach (ext); | |
| 4172 | |
| 4173 return extent; | |
| 4174 } | |
| 4175 | |
| 4176 DEFUN ("set-extent-endpoints", Fset_extent_endpoints, 3, 4, 0, /* | |
| 4177 Set the endpoints of EXTENT to START, END. | |
| 4178 If START and END are null, call detach-extent on EXTENT. | |
| 4179 BUFFER-OR-STRING specifies the new buffer or string that the extent should | |
| 4180 be in, and defaults to EXTENT's buffer or string. (If nil, and EXTENT | |
| 4181 is in no buffer and no string, it defaults to the current buffer.) | |
| 4182 See documentation on `detach-extent' for a discussion of undo recording. | |
| 4183 */ | |
| 4184 (extent, start, end, buffer_or_string)) | |
| 4185 { | |
| 4186 EXTENT ext; | |
| 826 | 4187 Bytexpos s, e; |
| 428 | 4188 |
| 4189 ext = decode_extent (extent, 0); | |
| 4190 | |
| 4191 if (NILP (buffer_or_string)) | |
| 4192 { | |
| 4193 buffer_or_string = extent_object (ext); | |
| 4194 if (NILP (buffer_or_string)) | |
| 4195 buffer_or_string = Fcurrent_buffer (); | |
| 4196 } | |
| 4197 else | |
| 4198 buffer_or_string = decode_buffer_or_string (buffer_or_string); | |
| 4199 | |
| 4200 if (NILP (start) && NILP (end)) | |
| 4201 return Fdetach_extent (extent); | |
| 4202 | |
| 4203 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e, | |
| 4204 GB_ALLOW_PAST_ACCESSIBLE); | |
| 4205 | |
| 468 | 4206 buffer_or_string_extent_info_force (buffer_or_string); |
| 428 | 4207 set_extent_endpoints (ext, s, e, buffer_or_string); |
| 4208 return extent; | |
| 4209 } | |
| 4210 | |
| 4211 | |
| 4212 /************************************************************************/ | |
| 4213 /* mapping over extents */ | |
| 4214 /************************************************************************/ | |
| 4215 | |
| 4216 static unsigned int | |
| 4217 decode_map_extents_flags (Lisp_Object flags) | |
| 4218 { | |
| 4219 unsigned int retval = 0; | |
| 4220 unsigned int all_extents_specified = 0; | |
| 4221 unsigned int in_region_specified = 0; | |
| 4222 | |
| 4223 if (EQ (flags, Qt)) /* obsoleteness compatibility */ | |
| 4224 return ME_END_CLOSED; | |
| 4225 if (NILP (flags)) | |
| 4226 return 0; | |
| 4227 if (SYMBOLP (flags)) | |
| 4228 flags = Fcons (flags, Qnil); | |
| 4229 while (!NILP (flags)) | |
| 4230 { | |
| 4231 Lisp_Object sym; | |
| 4232 CHECK_CONS (flags); | |
| 4233 sym = XCAR (flags); | |
| 4234 CHECK_SYMBOL (sym); | |
| 4235 if (EQ (sym, Qall_extents_closed) || EQ (sym, Qall_extents_open) || | |
| 4236 EQ (sym, Qall_extents_closed_open) || | |
| 4237 EQ (sym, Qall_extents_open_closed)) | |
| 4238 { | |
| 4239 if (all_extents_specified) | |
| 563 | 4240 invalid_argument ("Only one `all-extents-*' flag may be specified", Qunbound); |
| 428 | 4241 all_extents_specified = 1; |
| 4242 } | |
| 4243 if (EQ (sym, Qstart_in_region) || EQ (sym, Qend_in_region) || | |
| 4244 EQ (sym, Qstart_and_end_in_region) || | |
| 4245 EQ (sym, Qstart_or_end_in_region)) | |
| 4246 { | |
| 4247 if (in_region_specified) | |
| 563 | 4248 invalid_argument ("Only one `*-in-region' flag may be specified", Qunbound); |
| 428 | 4249 in_region_specified = 1; |
| 4250 } | |
| 4251 | |
| 4252 /* I do so love that conditional operator ... */ | |
| 4253 retval |= | |
| 4254 EQ (sym, Qend_closed) ? ME_END_CLOSED : | |
| 4255 EQ (sym, Qstart_open) ? ME_START_OPEN : | |
| 4256 EQ (sym, Qall_extents_closed) ? ME_ALL_EXTENTS_CLOSED : | |
| 4257 EQ (sym, Qall_extents_open) ? ME_ALL_EXTENTS_OPEN : | |
| 4258 EQ (sym, Qall_extents_closed_open) ? ME_ALL_EXTENTS_CLOSED_OPEN : | |
| 4259 EQ (sym, Qall_extents_open_closed) ? ME_ALL_EXTENTS_OPEN_CLOSED : | |
| 4260 EQ (sym, Qstart_in_region) ? ME_START_IN_REGION : | |
| 4261 EQ (sym, Qend_in_region) ? ME_END_IN_REGION : | |
| 4262 EQ (sym, Qstart_and_end_in_region) ? ME_START_AND_END_IN_REGION : | |
| 4263 EQ (sym, Qstart_or_end_in_region) ? ME_START_OR_END_IN_REGION : | |
| 4264 EQ (sym, Qnegate_in_region) ? ME_NEGATE_IN_REGION : | |
| 563 | 4265 (invalid_constant ("Invalid `map-extents' flag", sym), 0); |
| 428 | 4266 |
| 4267 flags = XCDR (flags); | |
| 4268 } | |
| 4269 return retval; | |
| 4270 } | |
| 4271 | |
| 4272 DEFUN ("extent-in-region-p", Fextent_in_region_p, 1, 4, 0, /* | |
| 4273 Return whether EXTENT overlaps a specified region. | |
| 4274 This is equivalent to whether `map-extents' would visit EXTENT when called | |
| 4275 with these args. | |
| 4276 */ | |
| 4277 (extent, from, to, flags)) | |
| 4278 { | |
| 826 | 4279 Bytexpos start, end; |
| 428 | 4280 EXTENT ext = decode_extent (extent, DE_MUST_BE_ATTACHED); |
| 4281 Lisp_Object obj = extent_object (ext); | |
| 4282 | |
| 4283 get_buffer_or_string_range_byte (obj, from, to, &start, &end, GB_ALLOW_NIL | | |
| 4284 GB_ALLOW_PAST_ACCESSIBLE); | |
| 4285 | |
| 4286 return extent_in_region_p (ext, start, end, decode_map_extents_flags (flags)) ? | |
| 4287 Qt : Qnil; | |
| 4288 } | |
| 4289 | |
| 4290 struct slow_map_extents_arg | |
| 4291 { | |
| 4292 Lisp_Object map_arg; | |
| 4293 Lisp_Object map_routine; | |
| 4294 Lisp_Object result; | |
| 4295 Lisp_Object property; | |
| 4296 Lisp_Object value; | |
| 4297 }; | |
| 4298 | |
| 4299 static int | |
| 4300 slow_map_extents_function (EXTENT extent, void *arg) | |
| 4301 { | |
| 4302 /* This function can GC */ | |
| 4303 struct slow_map_extents_arg *closure = (struct slow_map_extents_arg *) arg; | |
| 793 | 4304 Lisp_Object extent_obj = wrap_extent (extent); |
| 4305 | |
| 428 | 4306 |
| 4307 /* make sure this extent qualifies according to the PROPERTY | |
| 4308 and VALUE args */ | |
| 4309 | |
| 4310 if (!NILP (closure->property)) | |
| 4311 { | |
| 4312 Lisp_Object value = Fextent_property (extent_obj, closure->property, | |
| 4313 Qnil); | |
| 4314 if ((NILP (closure->value) && NILP (value)) || | |
| 4315 (!NILP (closure->value) && !EQ (value, closure->value))) | |
| 4316 return 0; | |
| 4317 } | |
| 4318 | |
| 4319 closure->result = call2 (closure->map_routine, extent_obj, | |
| 4320 closure->map_arg); | |
| 4321 return !NILP (closure->result); | |
| 4322 } | |
| 4323 | |
| 4324 DEFUN ("map-extents", Fmap_extents, 1, 8, 0, /* | |
| 4325 Map FUNCTION over the extents which overlap a region in OBJECT. | |
| 4326 OBJECT is normally a buffer or string but could be an extent (see below). | |
| 4327 The region is normally bounded by [FROM, TO) (i.e. the beginning of the | |
| 4328 region is closed and the end of the region is open), but this can be | |
| 4329 changed with the FLAGS argument (see below for a complete discussion). | |
| 4330 | |
| 4331 FUNCTION is called with the arguments (extent, MAPARG). The arguments | |
| 4332 OBJECT, FROM, TO, MAPARG, and FLAGS are all optional and default to | |
| 4333 the current buffer, the beginning of OBJECT, the end of OBJECT, nil, | |
| 4334 and nil, respectively. `map-extents' returns the first non-nil result | |
| 4335 produced by FUNCTION, and no more calls to FUNCTION are made after it | |
| 4336 returns non-nil. | |
| 4337 | |
| 4338 If OBJECT is an extent, FROM and TO default to the extent's endpoints, | |
| 4339 and the mapping omits that extent and its predecessors. This feature | |
| 4340 supports restarting a loop based on `map-extents'. Note: OBJECT must | |
| 4341 be attached to a buffer or string, and the mapping is done over that | |
| 4342 buffer or string. | |
| 4343 | |
| 4344 An extent overlaps the region if there is any point in the extent that is | |
| 4345 also in the region. (For the purpose of overlap, zero-length extents and | |
| 4346 regions are treated as closed on both ends regardless of their endpoints' | |
| 4347 specified open/closedness.) Note that the endpoints of an extent or region | |
| 4348 are considered to be in that extent or region if and only if the | |
| 4349 corresponding end is closed. For example, the extent [5,7] overlaps the | |
| 4350 region [2,5] because 5 is in both the extent and the region. However, (5,7] | |
| 4351 does not overlap [2,5] because 5 is not in the extent, and neither [5,7] nor | |
| 4352 \(5,7] overlaps the region [2,5) because 5 is not in the region. | |
| 4353 | |
| 4354 The optional FLAGS can be a symbol or a list of one or more symbols, | |
| 4355 modifying the behavior of `map-extents'. Allowed symbols are: | |
| 4356 | |
| 4357 end-closed The region's end is closed. | |
| 4358 | |
| 4359 start-open The region's start is open. | |
| 4360 | |
| 4361 all-extents-closed Treat all extents as closed on both ends for the | |
| 4362 purpose of determining whether they overlap the | |
| 4363 region, irrespective of their actual open- or | |
| 4364 closedness. | |
| 4365 all-extents-open Treat all extents as open on both ends. | |
| 4366 all-extents-closed-open Treat all extents as start-closed, end-open. | |
| 4367 all-extents-open-closed Treat all extents as start-open, end-closed. | |
| 4368 | |
| 4369 start-in-region In addition to the above conditions for extent | |
| 4370 overlap, the extent's start position must lie within | |
| 4371 the specified region. Note that, for this | |
| 4372 condition, open start positions are treated as if | |
| 4373 0.5 was added to the endpoint's value, and open | |
| 4374 end positions are treated as if 0.5 was subtracted | |
| 4375 from the endpoint's value. | |
| 4376 end-in-region The extent's end position must lie within the | |
| 4377 region. | |
| 4378 start-and-end-in-region Both the extent's start and end positions must lie | |
| 4379 within the region. | |
| 4380 start-or-end-in-region Either the extent's start or end position must lie | |
| 4381 within the region. | |
| 4382 | |
| 4383 negate-in-region The condition specified by a `*-in-region' flag | |
| 4384 must NOT hold for the extent to be considered. | |
| 4385 | |
| 4386 | |
| 4387 At most one of `all-extents-closed', `all-extents-open', | |
| 4388 `all-extents-closed-open', and `all-extents-open-closed' may be specified. | |
| 4389 | |
| 4390 At most one of `start-in-region', `end-in-region', | |
| 4391 `start-and-end-in-region', and `start-or-end-in-region' may be specified. | |
| 4392 | |
| 4393 If optional arg PROPERTY is non-nil, only extents with that property set | |
| 4394 on them will be visited. If optional arg VALUE is non-nil, only extents | |
| 4395 whose value for that property is `eq' to VALUE will be visited. | |
| 4396 */ | |
| 4397 (function, object, from, to, maparg, flags, property, value)) | |
| 4398 { | |
| 4399 /* This function can GC */ | |
| 4400 struct slow_map_extents_arg closure; | |
| 4401 unsigned int me_flags; | |
| 826 | 4402 Bytexpos start, end; |
| 428 | 4403 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 4404 EXTENT after = 0; | |
| 4405 | |
| 4406 if (EXTENTP (object)) | |
| 4407 { | |
| 4408 after = decode_extent (object, DE_MUST_BE_ATTACHED); | |
| 4409 if (NILP (from)) | |
| 4410 from = Fextent_start_position (object); | |
| 4411 if (NILP (to)) | |
| 4412 to = Fextent_end_position (object); | |
| 4413 object = extent_object (after); | |
| 4414 } | |
| 4415 else | |
| 4416 object = decode_buffer_or_string (object); | |
| 4417 | |
| 4418 get_buffer_or_string_range_byte (object, from, to, &start, &end, | |
| 4419 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE); | |
| 4420 | |
| 4421 me_flags = decode_map_extents_flags (flags); | |
| 4422 | |
| 4423 if (!NILP (property)) | |
| 4424 { | |
| 4425 if (!NILP (value)) | |
| 4426 value = canonicalize_extent_property (property, value); | |
| 4427 } | |
| 4428 | |
| 4429 GCPRO5 (function, maparg, object, property, value); | |
| 4430 | |
| 4431 closure.map_arg = maparg; | |
| 4432 closure.map_routine = function; | |
| 4433 closure.result = Qnil; | |
| 4434 closure.property = property; | |
| 4435 closure.value = value; | |
| 4436 | |
| 826 | 4437 map_extents (start, end, slow_map_extents_function, |
| 4438 (void *) &closure, object, after, | |
| 4439 /* You never know what the user might do ... */ | |
| 4440 me_flags | ME_MIGHT_CALL_ELISP); | |
| 428 | 4441 |
| 4442 UNGCPRO; | |
| 4443 return closure.result; | |
| 4444 } | |
| 4445 | |
| 4446 | |
| 4447 /************************************************************************/ | |
| 4448 /* mapping over extents -- other functions */ | |
| 4449 /************************************************************************/ | |
| 4450 | |
| 4451 /* ------------------------------- */ | |
| 4452 /* map-extent-children */ | |
| 4453 /* ------------------------------- */ | |
| 4454 | |
| 4455 struct slow_map_extent_children_arg | |
| 4456 { | |
| 4457 Lisp_Object map_arg; | |
| 4458 Lisp_Object map_routine; | |
| 4459 Lisp_Object result; | |
| 4460 Lisp_Object property; | |
| 4461 Lisp_Object value; | |
| 826 | 4462 Bytexpos start_min; |
| 4463 Bytexpos prev_start; | |
| 4464 Bytexpos prev_end; | |
| 428 | 4465 }; |
| 4466 | |
| 4467 static int | |
| 4468 slow_map_extent_children_function (EXTENT extent, void *arg) | |
| 4469 { | |
| 4470 /* This function can GC */ | |
| 4471 struct slow_map_extent_children_arg *closure = | |
| 4472 (struct slow_map_extent_children_arg *) arg; | |
| 4473 Lisp_Object extent_obj; | |
| 826 | 4474 Bytexpos start = extent_endpoint_byte (extent, 0); |
| 4475 Bytexpos end = extent_endpoint_byte (extent, 1); | |
| 428 | 4476 /* Make sure the extent starts inside the region of interest, |
| 4477 rather than just overlaps it. | |
| 4478 */ | |
| 4479 if (start < closure->start_min) | |
| 4480 return 0; | |
| 4481 /* Make sure the extent is not a child of a previous visited one. | |
| 4482 We know already, because of extent ordering, | |
| 4483 that start >= prev_start, and that if | |
| 4484 start == prev_start, then end <= prev_end. | |
| 4485 */ | |
| 4486 if (start == closure->prev_start) | |
| 4487 { | |
| 4488 if (end < closure->prev_end) | |
| 4489 return 0; | |
| 4490 } | |
| 4491 else /* start > prev_start */ | |
| 4492 { | |
| 4493 if (start < closure->prev_end) | |
| 4494 return 0; | |
| 4495 /* corner case: prev_end can be -1 if there is no prev */ | |
| 4496 } | |
| 793 | 4497 extent_obj = wrap_extent (extent); |
| 428 | 4498 |
| 4499 /* make sure this extent qualifies according to the PROPERTY | |
| 4500 and VALUE args */ | |
| 4501 | |
| 4502 if (!NILP (closure->property)) | |
| 4503 { | |
| 4504 Lisp_Object value = Fextent_property (extent_obj, closure->property, | |
| 4505 Qnil); | |
| 4506 if ((NILP (closure->value) && NILP (value)) || | |
| 4507 (!NILP (closure->value) && !EQ (value, closure->value))) | |
| 4508 return 0; | |
| 4509 } | |
| 4510 | |
| 4511 closure->result = call2 (closure->map_routine, extent_obj, | |
| 4512 closure->map_arg); | |
| 4513 | |
| 4514 /* Since the callback may change the buffer, compute all stored | |
| 4515 buffer positions here. | |
| 4516 */ | |
| 4517 closure->start_min = -1; /* no need for this any more */ | |
| 826 | 4518 closure->prev_start = extent_endpoint_byte (extent, 0); |
| 4519 closure->prev_end = extent_endpoint_byte (extent, 1); | |
| 428 | 4520 |
| 4521 return !NILP (closure->result); | |
| 4522 } | |
| 4523 | |
| 4524 DEFUN ("map-extent-children", Fmap_extent_children, 1, 8, 0, /* | |
| 4525 Map FUNCTION over the extents in the region from FROM to TO. | |
| 4526 FUNCTION is called with arguments (extent, MAPARG). See `map-extents' | |
| 4527 for a full discussion of the arguments FROM, TO, and FLAGS. | |
| 4528 | |
| 4529 The arguments are the same as for `map-extents', but this function differs | |
| 4530 in that it only visits extents which start in the given region, and also | |
| 4531 in that, after visiting an extent E, it skips all other extents which start | |
| 4532 inside E but end before E's end. | |
| 4533 | |
| 4534 Thus, this function may be used to walk a tree of extents in a buffer: | |
| 4535 (defun walk-extents (buffer &optional ignore) | |
| 4536 (map-extent-children 'walk-extents buffer)) | |
| 4537 */ | |
| 4538 (function, object, from, to, maparg, flags, property, value)) | |
| 4539 { | |
| 4540 /* This function can GC */ | |
| 4541 struct slow_map_extent_children_arg closure; | |
| 4542 unsigned int me_flags; | |
| 826 | 4543 Bytexpos start, end; |
| 428 | 4544 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 4545 EXTENT after = 0; | |
| 4546 | |
| 4547 if (EXTENTP (object)) | |
| 4548 { | |
| 4549 after = decode_extent (object, DE_MUST_BE_ATTACHED); | |
| 4550 if (NILP (from)) | |
| 4551 from = Fextent_start_position (object); | |
| 4552 if (NILP (to)) | |
| 4553 to = Fextent_end_position (object); | |
| 4554 object = extent_object (after); | |
| 4555 } | |
| 4556 else | |
| 4557 object = decode_buffer_or_string (object); | |
| 4558 | |
| 4559 get_buffer_or_string_range_byte (object, from, to, &start, &end, | |
| 4560 GB_ALLOW_NIL | GB_ALLOW_PAST_ACCESSIBLE); | |
| 4561 | |
| 4562 me_flags = decode_map_extents_flags (flags); | |
| 4563 | |
| 4564 if (!NILP (property)) | |
| 4565 { | |
| 4566 if (!NILP (value)) | |
| 4567 value = canonicalize_extent_property (property, value); | |
| 4568 } | |
| 4569 | |
| 4570 GCPRO5 (function, maparg, object, property, value); | |
| 4571 | |
| 4572 closure.map_arg = maparg; | |
| 4573 closure.map_routine = function; | |
| 4574 closure.result = Qnil; | |
| 4575 closure.property = property; | |
| 4576 closure.value = value; | |
| 4577 closure.start_min = start; | |
| 4578 closure.prev_start = -1; | |
| 4579 closure.prev_end = -1; | |
| 826 | 4580 map_extents (start, end, slow_map_extent_children_function, |
| 4581 (void *) &closure, object, after, | |
| 4582 /* You never know what the user might do ... */ | |
| 4583 me_flags | ME_MIGHT_CALL_ELISP); | |
| 428 | 4584 |
| 4585 UNGCPRO; | |
| 4586 return closure.result; | |
| 4587 } | |
| 4588 | |
| 4589 /* ------------------------------- */ | |
| 4590 /* extent-at */ | |
| 4591 /* ------------------------------- */ | |
| 4592 | |
| 4593 /* find "smallest" matching extent containing pos -- (flag == 0) means | |
| 4594 all extents match, else (EXTENT_FLAGS (extent) & flag) must be true; | |
| 4595 for more than one matching extent with precisely the same endpoints, | |
| 4596 we choose the last extent in the extents_list. | |
| 4597 The search stops just before "before", if that is non-null. | |
| 4598 */ | |
| 4599 | |
| 4600 struct extent_at_arg | |
| 4601 { | |
| 442 | 4602 Lisp_Object best_match; /* or list of extents */ |
| 826 | 4603 Memxpos best_start; |
| 4604 Memxpos best_end; | |
| 428 | 4605 Lisp_Object prop; |
| 4606 EXTENT before; | |
| 442 | 4607 int all_extents; |
| 428 | 4608 }; |
| 4609 | |
| 4610 static enum extent_at_flag | |
| 4611 decode_extent_at_flag (Lisp_Object at_flag) | |
| 4612 { | |
| 4613 if (NILP (at_flag)) | |
| 4614 return EXTENT_AT_AFTER; | |
| 4615 | |
| 4616 CHECK_SYMBOL (at_flag); | |
| 4617 if (EQ (at_flag, Qafter)) return EXTENT_AT_AFTER; | |
| 4618 if (EQ (at_flag, Qbefore)) return EXTENT_AT_BEFORE; | |
| 4619 if (EQ (at_flag, Qat)) return EXTENT_AT_AT; | |
| 4620 | |
| 563 | 4621 invalid_constant ("Invalid AT-FLAG in `extent-at'", at_flag); |
| 1204 | 4622 RETURN_NOT_REACHED (EXTENT_AT_AFTER); |
| 428 | 4623 } |
| 4624 | |
| 4625 static int | |
| 4626 extent_at_mapper (EXTENT e, void *arg) | |
| 4627 { | |
| 4628 struct extent_at_arg *closure = (struct extent_at_arg *) arg; | |
| 4629 | |
| 4630 if (e == closure->before) | |
| 4631 return 1; | |
| 4632 | |
| 4633 /* If closure->prop is non-nil, then the extent is only acceptable | |
| 4634 if it has a non-nil value for that property. */ | |
| 4635 if (!NILP (closure->prop)) | |
| 4636 { | |
| 793 | 4637 Lisp_Object extent = wrap_extent (e); |
| 4638 | |
| 428 | 4639 if (NILP (Fextent_property (extent, closure->prop, Qnil))) |
| 4640 return 0; | |
| 4641 } | |
| 4642 | |
| 442 | 4643 if (!closure->all_extents) |
| 428 | 4644 { |
| 442 | 4645 EXTENT current; |
| 4646 | |
| 4647 if (NILP (closure->best_match)) | |
| 428 | 4648 goto accept; |
| 442 | 4649 current = XEXTENT (closure->best_match); |
| 428 | 4650 /* redundant but quick test */ |
| 442 | 4651 if (extent_start (current) > extent_start (e)) |
| 428 | 4652 return 0; |
| 4653 | |
| 4654 /* we return the "last" best fit, instead of the first -- | |
| 4655 this is because then the glyph closest to two equivalent | |
| 4656 extents corresponds to the "extent-at" the text just past | |
| 4657 that same glyph */ | |
| 4658 else if (!EXTENT_LESS_VALS (e, closure->best_start, | |
| 4659 closure->best_end)) | |
| 4660 goto accept; | |
| 4661 else | |
| 4662 return 0; | |
| 4663 accept: | |
| 793 | 4664 closure->best_match = wrap_extent (e); |
| 428 | 4665 closure->best_start = extent_start (e); |
| 4666 closure->best_end = extent_end (e); | |
| 4667 } | |
| 442 | 4668 else |
| 4669 { | |
| 793 | 4670 Lisp_Object extent = wrap_extent (e); |
| 4671 | |
| 442 | 4672 closure->best_match = Fcons (extent, closure->best_match); |
| 4673 } | |
| 428 | 4674 |
| 4675 return 0; | |
| 4676 } | |
| 4677 | |
| 826 | 4678 Lisp_Object |
| 4679 extent_at (Bytexpos position, Lisp_Object object, | |
| 4680 Lisp_Object property, EXTENT before, | |
| 4681 enum extent_at_flag at_flag, int all_extents) | |
| 428 | 4682 { |
| 4683 struct extent_at_arg closure; | |
| 442 | 4684 struct gcpro gcpro1; |
| 428 | 4685 |
| 4686 /* it might be argued that invalid positions should cause | |
| 4687 errors, but the principle of least surprise dictates that | |
| 4688 nil should be returned (extent-at is often used in | |
| 4689 response to a mouse event, and in many cases previous events | |
| 4690 have changed the buffer contents). | |
| 4691 | |
| 4692 Also, the openness stuff in the text-property code currently | |
| 4693 does not check its limits and might go off the end. */ | |
| 4694 if ((at_flag == EXTENT_AT_BEFORE | |
| 4695 ? position <= buffer_or_string_absolute_begin_byte (object) | |
| 4696 : position < buffer_or_string_absolute_begin_byte (object)) | |
| 4697 || (at_flag == EXTENT_AT_AFTER | |
| 4698 ? position >= buffer_or_string_absolute_end_byte (object) | |
| 4699 : position > buffer_or_string_absolute_end_byte (object))) | |
| 4700 return Qnil; | |
| 4701 | |
| 442 | 4702 closure.best_match = Qnil; |
| 428 | 4703 closure.prop = property; |
| 4704 closure.before = before; | |
| 442 | 4705 closure.all_extents = all_extents; |
| 4706 | |
| 4707 GCPRO1 (closure.best_match); | |
| 826 | 4708 map_extents (at_flag == EXTENT_AT_BEFORE ? prev_bytexpos (object, position) : |
| 4709 position, | |
| 4710 at_flag == EXTENT_AT_AFTER ? next_bytexpos (object, position) : | |
| 4711 position, | |
| 4712 extent_at_mapper, (void *) &closure, object, 0, | |
| 4713 ME_START_OPEN | ME_ALL_EXTENTS_CLOSED); | |
| 442 | 4714 if (all_extents) |
| 4715 closure.best_match = Fnreverse (closure.best_match); | |
| 4716 UNGCPRO; | |
| 4717 | |
| 4718 return closure.best_match; | |
| 428 | 4719 } |
| 4720 | |
| 4721 DEFUN ("extent-at", Fextent_at, 1, 5, 0, /* | |
| 4722 Find "smallest" extent at POS in OBJECT having PROPERTY set. | |
| 4723 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1); | |
| 4724 i.e. if it covers the character after POS. (However, see the definition | |
| 4725 of AT-FLAG.) "Smallest" means the extent that comes last in the display | |
| 4726 order; this normally means the extent whose start position is closest to | |
| 4727 POS. See `next-extent' for more information. | |
| 4728 OBJECT specifies a buffer or string and defaults to the current buffer. | |
| 4729 PROPERTY defaults to nil, meaning that any extent will do. | |
| 4730 Properties are attached to extents with `set-extent-property', which see. | |
| 4731 Returns nil if POS is invalid or there is no matching extent at POS. | |
| 4732 If the fourth argument BEFORE is not nil, it must be an extent; any returned | |
| 4733 extent will precede that extent. This feature allows `extent-at' to be | |
| 4734 used by a loop over extents. | |
| 4735 AT-FLAG controls how end cases are handled, and should be one of: | |
| 4736 | |
| 4737 nil or `after' An extent is at POS if it covers the character | |
| 4738 after POS. This is consistent with the way | |
| 4739 that text properties work. | |
| 4740 `before' An extent is at POS if it covers the character | |
| 4741 before POS. | |
| 4742 `at' An extent is at POS if it overlaps or abuts POS. | |
| 4743 This includes all zero-length extents at POS. | |
| 4744 | |
| 4745 Note that in all cases, the start-openness and end-openness of the extents | |
| 4746 considered is ignored. If you want to pay attention to those properties, | |
| 4747 you should use `map-extents', which gives you more control. | |
| 4748 */ | |
| 4749 (pos, object, property, before, at_flag)) | |
| 4750 { | |
| 826 | 4751 Bytexpos position; |
| 428 | 4752 EXTENT before_extent; |
| 4753 enum extent_at_flag fl; | |
| 4754 | |
| 4755 object = decode_buffer_or_string (object); | |
| 4756 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD); | |
| 4757 if (NILP (before)) | |
| 4758 before_extent = 0; | |
| 4759 else | |
| 4760 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED); | |
| 4761 if (before_extent && !EQ (object, extent_object (before_extent))) | |
| 442 | 4762 invalid_argument ("extent not in specified buffer or string", object); |
| 428 | 4763 fl = decode_extent_at_flag (at_flag); |
| 4764 | |
| 826 | 4765 return extent_at (position, object, property, before_extent, fl, 0); |
| 442 | 4766 } |
| 4767 | |
| 4768 DEFUN ("extents-at", Fextents_at, 1, 5, 0, /* | |
| 4769 Find all extents at POS in OBJECT having PROPERTY set. | |
| 4770 Normally, an extent is "at" POS if it overlaps the region (POS, POS+1); | |
| 4771 i.e. if it covers the character after POS. (However, see the definition | |
| 4772 of AT-FLAG.) | |
| 4773 This provides similar functionality to `extent-list', but does so in a way | |
| 4774 that is compatible with `extent-at'. (For example, errors due to POS out of | |
| 4775 range are ignored; this makes it safer to use this function in response to | |
| 4776 a mouse event, because in many cases previous events have changed the buffer | |
| 4777 contents.) | |
| 4778 OBJECT specifies a buffer or string and defaults to the current buffer. | |
| 4779 PROPERTY defaults to nil, meaning that any extent will do. | |
| 4780 Properties are attached to extents with `set-extent-property', which see. | |
| 4781 Returns nil if POS is invalid or there is no matching extent at POS. | |
| 4782 If the fourth argument BEFORE is not nil, it must be an extent; any returned | |
| 4783 extent will precede that extent. This feature allows `extents-at' to be | |
| 4784 used by a loop over extents. | |
| 4785 AT-FLAG controls how end cases are handled, and should be one of: | |
| 4786 | |
| 4787 nil or `after' An extent is at POS if it covers the character | |
| 4788 after POS. This is consistent with the way | |
| 4789 that text properties work. | |
| 4790 `before' An extent is at POS if it covers the character | |
| 4791 before POS. | |
| 4792 `at' An extent is at POS if it overlaps or abuts POS. | |
| 4793 This includes all zero-length extents at POS. | |
| 4794 | |
| 4795 Note that in all cases, the start-openness and end-openness of the extents | |
| 4796 considered is ignored. If you want to pay attention to those properties, | |
| 4797 you should use `map-extents', which gives you more control. | |
| 4798 */ | |
| 4799 (pos, object, property, before, at_flag)) | |
| 4800 { | |
| 826 | 4801 Bytexpos position; |
| 442 | 4802 EXTENT before_extent; |
| 4803 enum extent_at_flag fl; | |
| 4804 | |
| 4805 object = decode_buffer_or_string (object); | |
| 4806 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD); | |
| 4807 if (NILP (before)) | |
| 4808 before_extent = 0; | |
| 4809 else | |
| 4810 before_extent = decode_extent (before, DE_MUST_BE_ATTACHED); | |
| 4811 if (before_extent && !EQ (object, extent_object (before_extent))) | |
| 4812 invalid_argument ("extent not in specified buffer or string", object); | |
| 4813 fl = decode_extent_at_flag (at_flag); | |
| 4814 | |
| 826 | 4815 return extent_at (position, object, property, before_extent, fl, 1); |
| 428 | 4816 } |
| 4817 | |
| 4818 /* ------------------------------- */ | |
| 4819 /* verify_extent_modification() */ | |
| 4820 /* ------------------------------- */ | |
| 4821 | |
| 4822 /* verify_extent_modification() is called when a buffer or string is | |
| 4823 modified to check whether the modification is occuring inside a | |
| 4824 read-only extent. | |
| 4825 */ | |
| 4826 | |
| 4827 struct verify_extents_arg | |
| 4828 { | |
| 4829 Lisp_Object object; | |
| 826 | 4830 Memxpos start; |
| 4831 Memxpos end; | |
| 428 | 4832 Lisp_Object iro; /* value of inhibit-read-only */ |
| 4833 }; | |
| 4834 | |
| 4835 static int | |
| 4836 verify_extent_mapper (EXTENT extent, void *arg) | |
| 4837 { | |
| 4838 struct verify_extents_arg *closure = (struct verify_extents_arg *) arg; | |
| 4839 Lisp_Object prop = extent_read_only (extent); | |
| 4840 | |
| 4841 if (NILP (prop)) | |
| 4842 return 0; | |
| 4843 | |
| 4844 if (CONSP (closure->iro) && !NILP (Fmemq (prop, closure->iro))) | |
| 4845 return 0; | |
| 4846 | |
| 4847 #if 0 /* Nobody seems to care for this any more -sb */ | |
| 4848 /* Allow deletion if the extent is completely contained in | |
| 4849 the region being deleted. | |
| 4850 This is important for supporting tokens which are internally | |
| 4851 write-protected, but which can be killed and yanked as a whole. | |
| 4852 Ignore open/closed distinctions at this point. | |
| 4853 -- Rose | |
| 4854 */ | |
| 4855 if (closure->start != closure->end && | |
| 4856 extent_start (extent) >= closure->start && | |
| 4857 extent_end (extent) <= closure->end) | |
| 4858 return 0; | |
| 4859 #endif | |
| 4860 | |
| 4861 while (1) | |
| 4862 Fsignal (Qbuffer_read_only, (list1 (closure->object))); | |
| 4863 | |
| 1204 | 4864 RETURN_NOT_REACHED(0); |
| 428 | 4865 } |
| 4866 | |
| 4867 /* Value of Vinhibit_read_only is precomputed and passed in for | |
| 4868 efficiency */ | |
| 4869 | |
| 4870 void | |
| 826 | 4871 verify_extent_modification (Lisp_Object object, Bytexpos from, Bytexpos to, |
| 428 | 4872 Lisp_Object inhibit_read_only_value) |
| 4873 { | |
| 4874 int closed; | |
| 4875 struct verify_extents_arg closure; | |
| 4876 | |
| 4877 /* If insertion, visit closed-endpoint extents touching the insertion | |
| 4878 point because the text would go inside those extents. If deletion, | |
| 4879 treat the range as open on both ends so that touching extents are not | |
| 4880 visited. Note that we assume that an insertion is occurring if the | |
| 4881 changed range has zero length, and a deletion otherwise. This | |
| 4882 fails if a change (i.e. non-insertion, non-deletion) is happening. | |
| 4883 As far as I know, this doesn't currently occur in XEmacs. --ben */ | |
| 4884 closed = (from==to); | |
| 4885 closure.object = object; | |
| 826 | 4886 closure.start = buffer_or_string_bytexpos_to_memxpos (object, from); |
| 4887 closure.end = buffer_or_string_bytexpos_to_memxpos (object, to); | |
| 428 | 4888 closure.iro = inhibit_read_only_value; |
| 4889 | |
| 826 | 4890 map_extents (from, to, verify_extent_mapper, (void *) &closure, |
| 4891 object, 0, closed ? ME_END_CLOSED : ME_START_OPEN); | |
| 428 | 4892 } |
| 4893 | |
| 4894 /* ------------------------------------ */ | |
| 4895 /* process_extents_for_insertion() */ | |
| 4896 /* ------------------------------------ */ | |
| 4897 | |
| 4898 struct process_extents_for_insertion_arg | |
| 4899 { | |
| 826 | 4900 Bytexpos opoint; |
| 428 | 4901 int length; |
| 4902 Lisp_Object object; | |
| 4903 }; | |
| 4904 | |
| 4905 /* A region of length LENGTH was just inserted at OPOINT. Modify all | |
| 4906 of the extents as required for the insertion, based on their | |
| 4907 start-open/end-open properties. | |
| 4908 */ | |
| 4909 | |
| 4910 static int | |
| 4911 process_extents_for_insertion_mapper (EXTENT extent, void *arg) | |
| 4912 { | |
| 4913 struct process_extents_for_insertion_arg *closure = | |
| 4914 (struct process_extents_for_insertion_arg *) arg; | |
| 826 | 4915 Memxpos indice = buffer_or_string_bytexpos_to_memxpos (closure->object, |
| 4916 closure->opoint); | |
| 428 | 4917 |
| 4918 /* When this function is called, one end of the newly-inserted text should | |
| 4919 be adjacent to some endpoint of the extent, or disjoint from it. If | |
| 4920 the insertion overlaps any existing extent, something is wrong. | |
| 4921 */ | |
| 4922 #ifdef ERROR_CHECK_EXTENTS | |
|
5053
0e803dc6f096
fix to assert in extents.c, so `make check' works
Ben Wing <ben@xemacs.org>
parents:
5050
diff
changeset
|
4923 assert (extent_start (extent) <= indice || extent_start (extent) >= indice + closure->length); |
|
0e803dc6f096
fix to assert in extents.c, so `make check' works
Ben Wing <ben@xemacs.org>
parents:
5050
diff
changeset
|
4924 assert (extent_end (extent) <= indice || extent_end (extent) >= indice + closure->length); |
| 428 | 4925 #endif |
| 4926 | |
| 4927 /* The extent-adjustment code adjusted the extent's endpoints as if | |
| 468 | 4928 all extents were closed-open -- endpoints at the insertion point |
| 4929 remain unchanged. We need to fix the other kinds of extents: | |
| 4930 | |
| 4931 1. Start position of start-open extents needs to be moved. | |
| 4932 | |
| 4933 2. End position of end-closed extents needs to be moved. | |
| 4934 | |
| 4935 Note that both conditions hold for zero-length (] extents at the | |
| 4936 insertion point. But under these rules, zero-length () extents | |
| 4937 would get adjusted such that their start is greater than their | |
| 4938 end; instead of allowing that, we treat them as [) extents by | |
| 4939 modifying condition #1 to not fire nothing when dealing with a | |
| 4940 zero-length open-open extent. | |
| 4941 | |
| 4942 Existence of zero-length open-open extents is unfortunately an | |
| 4943 inelegant part of the extent model, but there is no way around | |
| 4944 it. */ | |
| 428 | 4945 |
| 4946 { | |
| 826 | 4947 Memxpos new_start = extent_start (extent); |
| 4948 Memxpos new_end = extent_end (extent); | |
| 468 | 4949 |
| 4950 if (indice == extent_start (extent) && extent_start_open_p (extent) | |
| 4951 /* zero-length () extents are exempt; see comment above. */ | |
| 4952 && !(new_start == new_end && extent_end_open_p (extent)) | |
| 4953 ) | |
| 428 | 4954 new_start += closure->length; |
| 4955 if (indice == extent_end (extent) && !extent_end_open_p (extent)) | |
| 4956 new_end += closure->length; | |
| 468 | 4957 |
| 428 | 4958 set_extent_endpoints_1 (extent, new_start, new_end); |
| 4959 } | |
| 4960 | |
| 4961 return 0; | |
| 4962 } | |
| 4963 | |
| 4964 void | |
| 826 | 4965 process_extents_for_insertion (Lisp_Object object, Bytexpos opoint, |
| 428 | 4966 Bytecount length) |
| 4967 { | |
| 4968 struct process_extents_for_insertion_arg closure; | |
| 4969 | |
| 4970 closure.opoint = opoint; | |
| 4971 closure.length = length; | |
| 4972 closure.object = object; | |
| 4973 | |
| 826 | 4974 map_extents (opoint, opoint + length, |
| 4975 process_extents_for_insertion_mapper, | |
| 4976 (void *) &closure, object, 0, | |
| 4977 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS | | |
| 4978 ME_INCLUDE_INTERNAL); | |
| 428 | 4979 } |
| 4980 | |
| 4981 /* ------------------------------------ */ | |
| 4982 /* process_extents_for_deletion() */ | |
| 4983 /* ------------------------------------ */ | |
| 4984 | |
| 4985 struct process_extents_for_deletion_arg | |
| 4986 { | |
| 826 | 4987 Memxpos start, end; |
| 428 | 4988 int destroy_included_extents; |
| 4989 }; | |
| 4990 | |
| 4991 /* This function is called when we're about to delete the range [from, to]. | |
| 4992 Detach all of the extents that are completely inside the range [from, to], | |
| 4993 if they're detachable or open-open. */ | |
| 4994 | |
| 4995 static int | |
| 4996 process_extents_for_deletion_mapper (EXTENT extent, void *arg) | |
| 4997 { | |
| 4998 struct process_extents_for_deletion_arg *closure = | |
| 4999 (struct process_extents_for_deletion_arg *) arg; | |
| 5000 | |
| 5001 /* If the extent lies completely within the range that | |
| 5002 is being deleted, then nuke the extent if it's detachable | |
| 5003 (otherwise, it will become a zero-length extent). */ | |
| 5004 | |
| 5005 if (closure->start <= extent_start (extent) && | |
| 5006 extent_end (extent) <= closure->end) | |
| 5007 { | |
| 5008 if (extent_detachable_p (extent)) | |
| 5009 { | |
| 5010 if (closure->destroy_included_extents) | |
| 5011 destroy_extent (extent); | |
| 5012 else | |
| 5013 extent_detach (extent); | |
| 5014 } | |
| 5015 } | |
| 5016 | |
| 5017 return 0; | |
| 5018 } | |
| 5019 | |
| 5020 /* DESTROY_THEM means destroy the extents instead of just deleting them. | |
| 5021 It is unused currently, but perhaps might be used (there used to | |
| 5022 be a function process_extents_for_destruction(), #if 0'd out, | |
| 5023 that did the equivalent). */ | |
| 5024 void | |
| 826 | 5025 process_extents_for_deletion (Lisp_Object object, Bytexpos from, |
| 5026 Bytexpos to, int destroy_them) | |
| 428 | 5027 { |
| 5028 struct process_extents_for_deletion_arg closure; | |
| 5029 | |
| 826 | 5030 closure.start = buffer_or_string_bytexpos_to_memxpos (object, from); |
| 5031 closure.end = buffer_or_string_bytexpos_to_memxpos (object, to); | |
| 428 | 5032 closure.destroy_included_extents = destroy_them; |
| 5033 | |
| 826 | 5034 map_extents (from, to, process_extents_for_deletion_mapper, |
| 5035 (void *) &closure, object, 0, | |
| 5036 ME_END_CLOSED | ME_MIGHT_MODIFY_EXTENTS); | |
| 428 | 5037 } |
| 5038 | |
| 5039 /* ------------------------------- */ | |
| 5040 /* report_extent_modification() */ | |
| 5041 /* ------------------------------- */ | |
| 826 | 5042 |
| 5043 struct report_extent_modification_closure | |
| 5044 { | |
| 428 | 5045 Lisp_Object buffer; |
| 826 | 5046 Charxpos start, end; |
| 428 | 5047 int afterp; |
| 5048 int speccount; | |
| 5049 }; | |
| 5050 | |
| 5051 static Lisp_Object | |
| 5052 report_extent_modification_restore (Lisp_Object buffer) | |
| 5053 { | |
| 5054 if (current_buffer != XBUFFER (buffer)) | |
| 5055 Fset_buffer (buffer); | |
| 5056 return Qnil; | |
| 5057 } | |
| 5058 | |
| 5059 static int | |
| 5060 report_extent_modification_mapper (EXTENT extent, void *arg) | |
| 5061 { | |
| 5062 struct report_extent_modification_closure *closure = | |
| 5063 (struct report_extent_modification_closure *)arg; | |
| 5064 Lisp_Object exobj, startobj, endobj; | |
| 5065 Lisp_Object hook = (closure->afterp | |
| 5066 ? extent_after_change_functions (extent) | |
| 5067 : extent_before_change_functions (extent)); | |
| 5068 if (NILP (hook)) | |
| 5069 return 0; | |
| 5070 | |
| 793 | 5071 exobj = wrap_extent (extent); |
| 5072 startobj = make_int (closure->start); | |
| 5073 endobj = make_int (closure->end); | |
| 428 | 5074 |
| 5075 /* Now that we are sure to call elisp, set up an unwind-protect so | |
| 5076 inside_change_hook gets restored in case we throw. Also record | |
| 5077 the current buffer, in case we change it. Do the recording only | |
| 438 | 5078 once. |
| 5079 | |
| 5080 One confusing thing here is that our caller never actually calls | |
| 771 | 5081 unbind_to (closure.speccount). This is because |
| 826 | 5082 map_extents() unbinds before, and with a smaller |
| 771 | 5083 speccount. The additional unbind_to_1() in |
| 438 | 5084 report_extent_modification() would cause XEmacs to abort. */ |
| 428 | 5085 if (closure->speccount == -1) |
| 5086 { | |
| 5087 closure->speccount = specpdl_depth (); | |
| 5088 record_unwind_protect (report_extent_modification_restore, | |
| 5089 Fcurrent_buffer ()); | |
| 5090 } | |
| 5091 | |
| 5092 /* The functions will expect closure->buffer to be the current | |
| 5093 buffer, so change it if it isn't. */ | |
| 5094 if (current_buffer != XBUFFER (closure->buffer)) | |
| 5095 Fset_buffer (closure->buffer); | |
| 5096 | |
| 5097 /* #### It's a shame that we can't use any of the existing run_hook* | |
| 5098 functions here. This is so because all of them work with | |
| 5099 symbols, to be able to retrieve default values of local hooks. | |
| 438 | 5100 <sigh> |
| 5101 | |
| 5102 #### Idea: we could set up a dummy symbol, and call the hook | |
| 5103 functions on *that*. */ | |
| 428 | 5104 |
| 5105 if (!CONSP (hook) || EQ (XCAR (hook), Qlambda)) | |
| 5106 call3 (hook, exobj, startobj, endobj); | |
| 5107 else | |
| 5108 { | |
| 2367 | 5109 EXTERNAL_LIST_LOOP_2 (elt, hook) |
| 438 | 5110 /* #### Shouldn't this perform the same Fset_buffer() check as |
| 5111 above? */ | |
| 2367 | 5112 call3 (elt, exobj, startobj, endobj); |
| 428 | 5113 } |
| 5114 return 0; | |
| 5115 } | |
| 5116 | |
| 5117 void | |
| 665 | 5118 report_extent_modification (Lisp_Object buffer, Charbpos start, Charbpos end, |
| 438 | 5119 int afterp) |
| 428 | 5120 { |
| 5121 struct report_extent_modification_closure closure; | |
| 5122 | |
| 5123 closure.buffer = buffer; | |
| 5124 closure.start = start; | |
| 5125 closure.end = end; | |
| 5126 closure.afterp = afterp; | |
| 5127 closure.speccount = -1; | |
| 5128 | |
| 826 | 5129 map_extents (charbpos_to_bytebpos (XBUFFER (buffer), start), |
| 5130 charbpos_to_bytebpos (XBUFFER (buffer), end), | |
| 5131 report_extent_modification_mapper, (void *)&closure, | |
| 428 | 5132 buffer, NULL, ME_MIGHT_CALL_ELISP); |
| 5133 } | |
| 5134 | |
| 5135 | |
| 5136 /************************************************************************/ | |
| 5137 /* extent properties */ | |
| 5138 /************************************************************************/ | |
| 5139 | |
| 5140 static void | |
| 5141 set_extent_invisible (EXTENT extent, Lisp_Object value) | |
| 5142 { | |
| 5143 if (!EQ (extent_invisible (extent), value)) | |
| 5144 { | |
| 5145 set_extent_invisible_1 (extent, value); | |
| 826 | 5146 signal_extent_property_changed (extent, Qinvisible, 1); |
| 428 | 5147 } |
| 5148 } | |
| 5149 | |
| 5150 /* This function does "memoization" -- similar to the interning | |
| 5151 that happens with symbols. Given a list of faces, an equivalent | |
| 5152 list is returned such that if this function is called twice with | |
| 5153 input that is `equal', the resulting outputs will be `eq'. | |
| 5154 | |
| 5155 Note that the inputs and outputs are in general *not* `equal' -- | |
| 5156 faces in symbol form become actual face objects in the output. | |
| 5157 This is necessary so that temporary faces stay around. */ | |
| 5158 | |
| 5159 static Lisp_Object | |
| 5160 memoize_extent_face_internal (Lisp_Object list) | |
| 5161 { | |
| 5162 int len; | |
| 5163 int thelen; | |
| 5164 Lisp_Object cons, thecons; | |
| 5165 Lisp_Object oldtail, tail; | |
| 5166 struct gcpro gcpro1; | |
| 5167 | |
| 5168 if (NILP (list)) | |
| 5169 return Qnil; | |
| 5170 if (!CONSP (list)) | |
| 5171 return Fget_face (list); | |
| 5172 | |
| 5173 /* To do the memoization, we use a hash table mapping from | |
| 5174 external lists to internal lists. We do `equal' comparisons | |
| 5175 on the keys so the memoization works correctly. | |
| 5176 | |
| 5177 Note that we canonicalize things so that the keys in the | |
| 5178 hash table (the external lists) always contain symbols and | |
| 5179 the values (the internal lists) always contain face objects. | |
| 5180 | |
| 5181 We also maintain a "reverse" table that maps from the internal | |
| 5182 lists to the external equivalents. The idea here is twofold: | |
| 5183 | |
| 5184 1) `extent-face' wants to return a list containing face symbols | |
| 5185 rather than face objects. | |
| 5186 2) We don't want things to get quite so messed up if the user | |
| 5187 maliciously side-effects the returned lists. | |
| 5188 */ | |
| 5189 | |
| 5190 len = XINT (Flength (list)); | |
| 5191 thelen = XINT (Flength (Vextent_face_reusable_list)); | |
| 5192 oldtail = Qnil; | |
| 5193 tail = Qnil; | |
| 5194 GCPRO1 (oldtail); | |
| 5195 | |
| 5196 /* We canonicalize the given list into another list. | |
| 5197 We try to avoid consing except when necessary, so we have | |
| 5198 a reusable list. | |
| 5199 */ | |
| 5200 | |
| 5201 if (thelen < len) | |
| 5202 { | |
| 5203 cons = Vextent_face_reusable_list; | |
| 5204 while (!NILP (XCDR (cons))) | |
| 5205 cons = XCDR (cons); | |
| 5206 XCDR (cons) = Fmake_list (make_int (len - thelen), Qnil); | |
| 5207 } | |
| 5208 else if (thelen > len) | |
| 5209 { | |
| 5210 int i; | |
| 5211 | |
| 5212 /* Truncate the list temporarily so it's the right length; | |
| 5213 remember the old tail. */ | |
| 5214 cons = Vextent_face_reusable_list; | |
| 5215 for (i = 0; i < len - 1; i++) | |
| 5216 cons = XCDR (cons); | |
| 5217 tail = cons; | |
| 5218 oldtail = XCDR (cons); | |
| 5219 XCDR (cons) = Qnil; | |
| 5220 } | |
| 5221 | |
| 5222 thecons = Vextent_face_reusable_list; | |
| 2367 | 5223 { |
| 5224 EXTERNAL_LIST_LOOP_2 (face, list) | |
| 5225 { | |
| 5226 face = Fget_face (face); | |
| 5227 | |
| 5228 XCAR (thecons) = Fface_name (face); | |
| 5229 thecons = XCDR (thecons); | |
| 5230 } | |
| 5231 } | |
| 428 | 5232 |
| 5233 list = Fgethash (Vextent_face_reusable_list, Vextent_face_memoize_hash_table, | |
| 5234 Qnil); | |
| 5235 if (NILP (list)) | |
| 5236 { | |
| 5237 Lisp_Object symlist = Fcopy_sequence (Vextent_face_reusable_list); | |
| 5238 Lisp_Object facelist = Fcopy_sequence (Vextent_face_reusable_list); | |
| 5239 | |
| 5240 LIST_LOOP (cons, facelist) | |
| 5241 { | |
| 5242 XCAR (cons) = Fget_face (XCAR (cons)); | |
| 5243 } | |
| 5244 Fputhash (symlist, facelist, Vextent_face_memoize_hash_table); | |
| 5245 Fputhash (facelist, symlist, Vextent_face_reverse_memoize_hash_table); | |
| 5246 list = facelist; | |
| 5247 } | |
| 5248 | |
| 5249 /* Now restore the truncated tail of the reusable list, if necessary. */ | |
| 5250 if (!NILP (tail)) | |
| 5251 XCDR (tail) = oldtail; | |
| 5252 | |
| 5253 UNGCPRO; | |
| 5254 return list; | |
| 5255 } | |
| 5256 | |
| 5257 static Lisp_Object | |
| 5258 external_of_internal_memoized_face (Lisp_Object face) | |
| 5259 { | |
| 5260 if (NILP (face)) | |
| 5261 return Qnil; | |
| 5262 else if (!CONSP (face)) | |
| 5263 return XFACE (face)->name; | |
| 5264 else | |
| 5265 { | |
| 5266 face = Fgethash (face, Vextent_face_reverse_memoize_hash_table, | |
| 5267 Qunbound); | |
| 5268 assert (!UNBOUNDP (face)); | |
| 5269 return face; | |
| 5270 } | |
| 5271 } | |
| 5272 | |
| 826 | 5273 /* The idea here is that if we're given a list of faces, we |
| 5274 need to "memoize" this so that two lists of faces that are `equal' | |
| 5275 turn into the same object. When `set-extent-face' is called, we | |
| 5276 "memoize" into a list of actual faces; when `extent-face' is called, | |
| 5277 we do a reverse lookup to get the list of symbols. */ | |
| 5278 | |
| 428 | 5279 static Lisp_Object |
| 5280 canonicalize_extent_property (Lisp_Object prop, Lisp_Object value) | |
| 5281 { | |
| 5282 if (EQ (prop, Qface) || EQ (prop, Qmouse_face)) | |
| 5283 value = (external_of_internal_memoized_face | |
| 5284 (memoize_extent_face_internal (value))); | |
| 5285 return value; | |
| 5286 } | |
| 5287 | |
| 5288 /* Do we need a lisp-level function ? */ | |
| 826 | 5289 DEFUN ("set-extent-initial-redisplay-function", |
| 5290 Fset_extent_initial_redisplay_function, | |
| 444 | 5291 2,2,0, /* |
| 428 | 5292 Note: This feature is experimental! |
| 5293 | |
| 5294 Set initial-redisplay-function of EXTENT to the function | |
| 5295 FUNCTION. | |
| 5296 | |
| 5297 The first time the EXTENT is (re)displayed, an eval event will be | |
| 5298 dispatched calling FUNCTION with EXTENT as its only argument. | |
| 5299 */ | |
| 5300 (extent, function)) | |
| 5301 { | |
| 826 | 5302 /* #### This is totally broken. */ |
| 5303 EXTENT e = decode_extent (extent, DE_MUST_BE_ATTACHED); | |
| 428 | 5304 |
| 5305 e = extent_ancestor (e); /* Is this needed? Macro also does chasing!*/ | |
| 826 | 5306 set_extent_initial_redisplay_function (e, function); |
| 5307 extent_in_red_event_p (e) = 0; /* If the function changed we can spawn | |
| 428 | 5308 new events */ |
| 826 | 5309 signal_extent_property_changed (e, Qinitial_redisplay_function, 1); |
| 428 | 5310 return function; |
| 5311 } | |
| 5312 | |
| 5313 DEFUN ("extent-face", Fextent_face, 1, 1, 0, /* | |
| 5314 Return the name of the face in which EXTENT is displayed, or nil | |
| 5315 if the extent's face is unspecified. This might also return a list | |
| 5316 of face names. | |
| 5317 */ | |
| 5318 (extent)) | |
| 5319 { | |
| 5320 Lisp_Object face; | |
| 5321 | |
| 5322 CHECK_EXTENT (extent); | |
| 5323 face = extent_face (XEXTENT (extent)); | |
| 5324 | |
| 5325 return external_of_internal_memoized_face (face); | |
| 5326 } | |
| 5327 | |
| 5328 DEFUN ("set-extent-face", Fset_extent_face, 2, 2, 0, /* | |
| 5329 Make the given EXTENT have the graphic attributes specified by FACE. | |
| 5330 FACE can also be a list of faces, and all faces listed will apply, | |
| 5331 with faces earlier in the list taking priority over those later in the | |
| 5332 list. | |
| 5333 */ | |
| 5334 (extent, face)) | |
| 5335 { | |
| 5336 EXTENT e = decode_extent(extent, 0); | |
| 5337 Lisp_Object orig_face = face; | |
| 5338 | |
| 5339 /* retrieve the ancestor for efficiency and proper redisplay noting. */ | |
| 5340 e = extent_ancestor (e); | |
| 5341 | |
| 5342 face = memoize_extent_face_internal (face); | |
| 5343 | |
| 5344 extent_face (e) = face; | |
| 826 | 5345 signal_extent_property_changed (e, Qface, 1); |
| 428 | 5346 |
| 5347 return orig_face; | |
| 5348 } | |
| 5349 | |
| 5350 | |
| 5351 DEFUN ("extent-mouse-face", Fextent_mouse_face, 1, 1, 0, /* | |
| 5352 Return the face used to highlight EXTENT when the mouse passes over it. | |
| 5353 The return value will be a face name, a list of face names, or nil | |
| 5354 if the extent's mouse face is unspecified. | |
| 5355 */ | |
| 5356 (extent)) | |
| 5357 { | |
| 5358 Lisp_Object face; | |
| 5359 | |
| 5360 CHECK_EXTENT (extent); | |
| 5361 face = extent_mouse_face (XEXTENT (extent)); | |
| 5362 | |
| 5363 return external_of_internal_memoized_face (face); | |
| 5364 } | |
| 5365 | |
| 5366 DEFUN ("set-extent-mouse-face", Fset_extent_mouse_face, 2, 2, 0, /* | |
| 5367 Set the face used to highlight EXTENT when the mouse passes over it. | |
| 5368 FACE can also be a list of faces, and all faces listed will apply, | |
| 5369 with faces earlier in the list taking priority over those later in the | |
| 5370 list. | |
| 5371 */ | |
| 5372 (extent, face)) | |
| 5373 { | |
| 5374 EXTENT e; | |
| 5375 Lisp_Object orig_face = face; | |
| 5376 | |
| 5377 CHECK_EXTENT (extent); | |
| 5378 e = XEXTENT (extent); | |
| 5379 /* retrieve the ancestor for efficiency and proper redisplay noting. */ | |
| 5380 e = extent_ancestor (e); | |
| 5381 | |
| 5382 face = memoize_extent_face_internal (face); | |
| 5383 | |
| 5384 set_extent_mouse_face (e, face); | |
| 826 | 5385 signal_extent_property_changed (e, Qmouse_face, 1); |
| 428 | 5386 |
| 5387 return orig_face; | |
| 5388 } | |
| 5389 | |
| 5390 void | |
| 5391 set_extent_glyph (EXTENT extent, Lisp_Object glyph, int endp, | |
| 5392 glyph_layout layout) | |
| 5393 { | |
| 5394 extent = extent_ancestor (extent); | |
| 5395 | |
| 5396 if (!endp) | |
| 5397 { | |
| 5398 set_extent_begin_glyph (extent, glyph); | |
| 647 | 5399 set_extent_begin_glyph_layout (extent, layout); |
| 826 | 5400 signal_extent_property_changed (extent, Qbegin_glyph, 1); |
| 5401 signal_extent_property_changed (extent, Qbegin_glyph_layout, 1); | |
| 428 | 5402 } |
| 5403 else | |
| 5404 { | |
| 5405 set_extent_end_glyph (extent, glyph); | |
| 647 | 5406 set_extent_end_glyph_layout (extent, layout); |
| 826 | 5407 signal_extent_property_changed (extent, Qend_glyph, 1); |
| 5408 signal_extent_property_changed (extent, Qend_glyph_layout, 1); | |
| 428 | 5409 } |
| 5410 } | |
| 5411 | |
| 5412 static Lisp_Object | |
| 5413 glyph_layout_to_symbol (glyph_layout layout) | |
| 5414 { | |
| 5415 switch (layout) | |
| 5416 { | |
| 5417 case GL_TEXT: return Qtext; | |
| 5418 case GL_OUTSIDE_MARGIN: return Qoutside_margin; | |
| 5419 case GL_INSIDE_MARGIN: return Qinside_margin; | |
| 5420 case GL_WHITESPACE: return Qwhitespace; | |
| 5421 default: | |
| 2500 | 5422 ABORT (); |
| 428 | 5423 return Qnil; /* unreached */ |
| 5424 } | |
| 5425 } | |
| 5426 | |
| 5427 static glyph_layout | |
| 5428 symbol_to_glyph_layout (Lisp_Object layout_obj) | |
| 5429 { | |
| 5430 if (NILP (layout_obj)) | |
| 5431 return GL_TEXT; | |
| 5432 | |
| 5433 CHECK_SYMBOL (layout_obj); | |
| 5434 if (EQ (layout_obj, Qoutside_margin)) return GL_OUTSIDE_MARGIN; | |
| 5435 if (EQ (layout_obj, Qinside_margin)) return GL_INSIDE_MARGIN; | |
| 5436 if (EQ (layout_obj, Qwhitespace)) return GL_WHITESPACE; | |
| 5437 if (EQ (layout_obj, Qtext)) return GL_TEXT; | |
| 5438 | |
| 563 | 5439 invalid_constant ("Unknown glyph layout type", layout_obj); |
| 1204 | 5440 RETURN_NOT_REACHED (GL_TEXT); |
| 428 | 5441 } |
| 5442 | |
| 5443 static Lisp_Object | |
| 5444 set_extent_glyph_1 (Lisp_Object extent_obj, Lisp_Object glyph, int endp, | |
| 5445 Lisp_Object layout_obj) | |
| 5446 { | |
| 442 | 5447 EXTENT extent = decode_extent (extent_obj, 0); |
| 428 | 5448 glyph_layout layout = symbol_to_glyph_layout (layout_obj); |
| 5449 | |
| 5450 /* Make sure we've actually been given a valid glyph or it's nil | |
| 5451 (meaning we're deleting a glyph from an extent). */ | |
| 5452 if (!NILP (glyph)) | |
| 5453 CHECK_BUFFER_GLYPH (glyph); | |
| 5454 | |
| 5455 set_extent_glyph (extent, glyph, endp, layout); | |
| 5456 return glyph; | |
| 5457 } | |
| 5458 | |
| 5459 DEFUN ("set-extent-begin-glyph", Fset_extent_begin_glyph, 2, 3, 0, /* | |
| 5460 Display a bitmap, subwindow or string at the beginning of EXTENT. | |
| 5461 BEGIN-GLYPH must be a glyph object. The layout policy defaults to `text'. | |
| 5462 */ | |
| 5463 (extent, begin_glyph, layout)) | |
| 5464 { | |
| 5465 return set_extent_glyph_1 (extent, begin_glyph, 0, layout); | |
| 5466 } | |
| 5467 | |
| 5468 DEFUN ("set-extent-end-glyph", Fset_extent_end_glyph, 2, 3, 0, /* | |
| 5469 Display a bitmap, subwindow or string at the end of EXTENT. | |
| 5470 END-GLYPH must be a glyph object. The layout policy defaults to `text'. | |
| 5471 */ | |
| 5472 (extent, end_glyph, layout)) | |
| 5473 { | |
| 5474 return set_extent_glyph_1 (extent, end_glyph, 1, layout); | |
| 5475 } | |
| 5476 | |
| 5477 DEFUN ("extent-begin-glyph", Fextent_begin_glyph, 1, 1, 0, /* | |
| 5478 Return the glyph object displayed at the beginning of EXTENT. | |
| 5479 If there is none, nil is returned. | |
| 5480 */ | |
| 5481 (extent)) | |
| 5482 { | |
| 5483 return extent_begin_glyph (decode_extent (extent, 0)); | |
| 5484 } | |
| 5485 | |
| 5486 DEFUN ("extent-end-glyph", Fextent_end_glyph, 1, 1, 0, /* | |
| 5487 Return the glyph object displayed at the end of EXTENT. | |
| 5488 If there is none, nil is returned. | |
| 5489 */ | |
| 5490 (extent)) | |
| 5491 { | |
| 5492 return extent_end_glyph (decode_extent (extent, 0)); | |
| 5493 } | |
| 5494 | |
| 5495 DEFUN ("set-extent-begin-glyph-layout", Fset_extent_begin_glyph_layout, 2, 2, 0, /* | |
| 5496 Set the layout policy of EXTENT's begin glyph. | |
| 5497 Access this using the `extent-begin-glyph-layout' function. | |
| 5498 */ | |
| 5499 (extent, layout)) | |
| 5500 { | |
| 5501 EXTENT e = decode_extent (extent, 0); | |
| 5502 e = extent_ancestor (e); | |
| 647 | 5503 set_extent_begin_glyph_layout (e, symbol_to_glyph_layout (layout)); |
| 826 | 5504 signal_extent_property_changed (e, Qbegin_glyph_layout, 1); |
| 428 | 5505 return layout; |
| 5506 } | |
| 5507 | |
| 5508 DEFUN ("set-extent-end-glyph-layout", Fset_extent_end_glyph_layout, 2, 2, 0, /* | |
| 5509 Set the layout policy of EXTENT's end glyph. | |
| 5510 Access this using the `extent-end-glyph-layout' function. | |
| 5511 */ | |
| 5512 (extent, layout)) | |
| 5513 { | |
| 5514 EXTENT e = decode_extent (extent, 0); | |
| 5515 e = extent_ancestor (e); | |
| 647 | 5516 set_extent_end_glyph_layout (e, symbol_to_glyph_layout (layout)); |
| 826 | 5517 signal_extent_property_changed (e, Qend_glyph_layout, 1); |
| 428 | 5518 return layout; |
| 5519 } | |
| 5520 | |
| 5521 DEFUN ("extent-begin-glyph-layout", Fextent_begin_glyph_layout, 1, 1, 0, /* | |
| 5522 Return the layout policy associated with EXTENT's begin glyph. | |
| 5523 Set this using the `set-extent-begin-glyph-layout' function. | |
| 5524 */ | |
| 5525 (extent)) | |
| 5526 { | |
| 5527 EXTENT e = decode_extent (extent, 0); | |
| 5528 return glyph_layout_to_symbol ((glyph_layout) extent_begin_glyph_layout (e)); | |
| 5529 } | |
| 5530 | |
| 5531 DEFUN ("extent-end-glyph-layout", Fextent_end_glyph_layout, 1, 1, 0, /* | |
| 5532 Return the layout policy associated with EXTENT's end glyph. | |
| 5533 Set this using the `set-extent-end-glyph-layout' function. | |
| 5534 */ | |
| 5535 (extent)) | |
| 5536 { | |
| 5537 EXTENT e = decode_extent (extent, 0); | |
| 5538 return glyph_layout_to_symbol ((glyph_layout) extent_end_glyph_layout (e)); | |
| 5539 } | |
| 5540 | |
| 5541 DEFUN ("set-extent-priority", Fset_extent_priority, 2, 2, 0, /* | |
| 5542 Set the display priority of EXTENT to PRIORITY (an integer). | |
| 5543 When the extent attributes are being merged for display, the priority | |
| 5544 is used to determine which extent takes precedence in the event of a | |
| 5545 conflict (two extents whose faces both specify font, for example: the | |
| 5546 font of the extent with the higher priority will be used). | |
| 5547 Extents are created with priority 0; priorities may be negative. | |
| 5548 */ | |
| 5549 (extent, priority)) | |
| 5550 { | |
| 5551 EXTENT e = decode_extent (extent, 0); | |
| 5552 | |
| 5553 CHECK_INT (priority); | |
| 5554 e = extent_ancestor (e); | |
| 5555 set_extent_priority (e, XINT (priority)); | |
| 826 | 5556 signal_extent_property_changed (e, Qpriority, 1); |
| 428 | 5557 return priority; |
| 5558 } | |
| 5559 | |
| 5560 DEFUN ("extent-priority", Fextent_priority, 1, 1, 0, /* | |
| 5561 Return the display priority of EXTENT; see `set-extent-priority'. | |
| 5562 */ | |
| 5563 (extent)) | |
| 5564 { | |
| 5565 EXTENT e = decode_extent (extent, 0); | |
| 5566 return make_int (extent_priority (e)); | |
| 5567 } | |
| 5568 | |
| 5569 DEFUN ("set-extent-property", Fset_extent_property, 3, 3, 0, /* | |
| 5570 Change a property of an extent. | |
| 5571 PROPERTY may be any symbol; the value stored may be accessed with | |
| 5572 the `extent-property' function. | |
| 2758 | 5573 |
| 428 | 5574 The following symbols have predefined meanings: |
| 5575 | |
| 5576 detached Removes the extent from its buffer; setting this is | |
| 5577 the same as calling `detach-extent'. | |
| 5578 | |
| 5579 destroyed Removes the extent from its buffer, and makes it | |
| 5580 unusable in the future; this is the same calling | |
| 5581 `delete-extent'. | |
| 5582 | |
| 5583 priority Change redisplay priority; same as `set-extent-priority'. | |
| 5584 | |
| 5585 start-open Whether the set of characters within the extent is | |
| 5586 treated being open on the left, that is, whether | |
| 5587 the start position is an exclusive, rather than | |
| 5588 inclusive, boundary. If true, then characters | |
| 5589 inserted exactly at the beginning of the extent | |
| 5590 will remain outside of the extent; otherwise they | |
| 5591 will go into the extent, extending it. | |
| 5592 | |
| 5593 end-open Whether the set of characters within the extent is | |
| 5594 treated being open on the right, that is, whether | |
| 5595 the end position is an exclusive, rather than | |
| 5596 inclusive, boundary. If true, then characters | |
| 5597 inserted exactly at the end of the extent will | |
| 5598 remain outside of the extent; otherwise they will | |
| 5599 go into the extent, extending it. | |
| 5600 | |
| 5601 By default, extents have the `end-open' but not the | |
| 5602 `start-open' property set. | |
| 5603 | |
| 5604 read-only Text within this extent will be unmodifiable. | |
| 5605 | |
| 5606 initial-redisplay-function (EXPERIMENTAL) | |
| 5607 function to be called the first time (part of) the extent | |
| 5608 is redisplayed. It will be called with the extent as its | |
| 5609 first argument. | |
| 1041 | 5610 Note: The function will not be called immediately |
| 5611 during redisplay, an eval event will be dispatched. | |
| 428 | 5612 |
| 5613 detachable Whether the extent gets detached (as with | |
| 5614 `detach-extent') when all the text within the | |
| 5615 extent is deleted. This is true by default. If | |
| 5616 this property is not set, the extent becomes a | |
| 5617 zero-length extent when its text is deleted. (In | |
| 5618 such a case, the `start-open' property is | |
| 5619 automatically removed if both the `start-open' and | |
| 5620 `end-open' properties are set, since zero-length | |
| 5621 extents open on both ends are not allowed.) | |
| 5622 | |
| 5623 face The face in which to display the text. Setting | |
| 5624 this is the same as calling `set-extent-face'. | |
| 5625 | |
| 1041 | 5626 mouse-face If non-nil, the extent will be highlighted in this |
| 5627 face when the mouse moves over it. | |
| 428 | 5628 |
| 5629 pointer If non-nil, and a valid pointer glyph, this specifies | |
| 5630 the shape of the mouse pointer while over the extent. | |
| 5631 | |
| 5632 highlight Obsolete: Setting this property is equivalent to | |
| 1041 | 5633 setting a `mouse-face' property of `highlight'. |
| 5634 Reading this property returns non-nil if | |
| 5635 the extent has a non-nil `mouse-face' property. | |
| 428 | 5636 |
| 5637 duplicable Whether this extent should be copied into strings, | |
| 5638 so that kill, yank, and undo commands will restore | |
| 5639 or copy it. `duplicable' extents are copied from | |
| 5640 an extent into a string when `buffer-substring' or | |
| 5641 a similar function creates a string. The extents | |
| 5642 in a string are copied into other strings created | |
| 5643 from the string using `concat' or `substring'. | |
| 5644 When `insert' or a similar function inserts the | |
| 5645 string into a buffer, the extents are copied back | |
| 5646 into the buffer. | |
| 5647 | |
| 5648 unique Meaningful only in conjunction with `duplicable'. | |
| 5649 When this is set, there may be only one instance | |
| 5650 of this extent attached at a time: if it is copied | |
| 5651 to the kill ring and then yanked, the extent is | |
| 5652 not copied. If, however, it is killed (removed | |
| 5653 from the buffer) and then yanked, it will be | |
| 5654 re-attached at the new position. | |
| 5655 | |
| 5656 invisible If the value is non-nil, text under this extent | |
| 5657 may be treated as not present for the purpose of | |
| 5658 redisplay, or may be displayed using an ellipsis | |
| 5659 or other marker; see `buffer-invisibility-spec' | |
| 5660 and `invisible-text-glyph'. In all cases, | |
| 5661 however, the text is still visible to other | |
| 5662 functions that examine a buffer's text. | |
| 5663 | |
| 5664 keymap This keymap is consulted for mouse clicks on this | |
| 5665 extent, or keypresses made while point is within the | |
| 5666 extent. | |
| 5667 | |
| 5668 copy-function This is a hook that is run when a duplicable extent | |
| 5669 is about to be copied from a buffer to a string (or | |
| 5670 the kill ring). It is called with three arguments, | |
| 5671 the extent, and the buffer-positions within it | |
| 5672 which are being copied. If this function returns | |
| 5673 nil, then the extent will not be copied; otherwise | |
| 5674 it will. | |
| 5675 | |
| 5676 paste-function This is a hook that is run when a duplicable extent is | |
| 5677 about to be copied from a string (or the kill ring) | |
| 5678 into a buffer. It is called with three arguments, | |
| 5679 the original extent, and the buffer positions which | |
| 5680 the copied extent will occupy. (This hook is run | |
| 5681 after the corresponding text has already been | |
| 5682 inserted into the buffer.) Note that the extent | |
| 5683 argument may be detached when this function is run. | |
| 5684 If this function returns nil, no extent will be | |
| 5685 inserted. Otherwise, there will be an extent | |
| 5686 covering the range in question. | |
| 5687 | |
| 5688 If the original extent is not attached to a buffer, | |
| 5689 then it will be re-attached at this range. | |
| 5690 Otherwise, a copy will be made, and that copy | |
| 5691 attached here. | |
| 5692 | |
| 5693 The copy-function and paste-function are meaningful | |
| 5694 only for extents with the `duplicable' flag set, | |
| 5695 and if they are not specified, behave as if `t' was | |
| 5696 the returned value. When these hooks are invoked, | |
| 5697 the current buffer is the buffer which the extent | |
| 5698 is being copied from/to, respectively. | |
| 5699 | |
| 5700 begin-glyph A glyph to be displayed at the beginning of the extent, | |
| 5701 or nil. | |
| 5702 | |
| 5703 end-glyph A glyph to be displayed at the end of the extent, | |
| 5704 or nil. | |
| 5705 | |
| 5706 begin-glyph-layout The layout policy (one of `text', `whitespace', | |
| 5707 `inside-margin', or `outside-margin') of the extent's | |
| 5708 begin glyph. | |
| 5709 | |
| 1041 | 5710 end-glyph-layout The layout policy of the extent's end glyph. |
| 5711 | |
| 5712 syntax-table A cons or a syntax table object. If a cons, the car must | |
| 2767 | 5713 be an integer (interpreted as a syntax code, applicable |
| 5714 to all characters in the extent). Otherwise, syntax of | |
| 5715 characters in the extent is looked up in the syntax | |
| 5716 table. You should use the text property API to | |
| 5717 manipulate this property. (This may be required in the | |
| 5718 future.) | |
| 5719 | |
| 5720 The following property is available if `atomic-extents.el'--part of the | |
| 5721 `edit-utils' package--has been loaded: | |
| 2758 | 5722 |
| 5723 atomic When set, point will never fall inside the extent. | |
| 5724 Not as useful as you might think, as | |
| 5725 `delete-backward-char' still removes characters one by | |
| 2767 | 5726 one. This property as currently implemented is a |
| 5727 kludge, and be prepared for it to go away if and when we | |
| 5728 implement something better. | |
| 2758 | 5729 |
| 428 | 5730 */ |
| 5731 (extent, property, value)) | |
| 5732 { | |
| 5733 /* This function can GC if property is `keymap' */ | |
| 5734 EXTENT e = decode_extent (extent, 0); | |
| 826 | 5735 int signal_change = 0; |
| 5736 | |
| 5737 /* If VALUE is unbound, the property is being removed through `remprop'. | |
| 5738 Return Qunbound if removal disallowed, Qt if anything removed, | |
| 5739 Qnil otherwise. */ | |
| 5740 | |
| 5741 /* Keep in synch with stuff below. */ | |
| 5742 if (UNBOUNDP (value)) | |
| 5743 { | |
| 5744 int retval; | |
| 5745 | |
| 5746 if (EQ (property, Qread_only) | |
| 5747 || EQ (property, Qunique) | |
| 5748 || EQ (property, Qduplicable) | |
| 5749 || EQ (property, Qinvisible) | |
| 5750 || EQ (property, Qdetachable) | |
| 5751 || EQ (property, Qdetached) | |
| 5752 || EQ (property, Qdestroyed) | |
| 5753 || EQ (property, Qpriority) | |
| 5754 || EQ (property, Qface) | |
| 5755 || EQ (property, Qinitial_redisplay_function) | |
| 5756 || EQ (property, Qafter_change_functions) | |
| 5757 || EQ (property, Qbefore_change_functions) | |
| 5758 || EQ (property, Qmouse_face) | |
| 5759 || EQ (property, Qhighlight) | |
| 5760 || EQ (property, Qbegin_glyph_layout) | |
| 5761 || EQ (property, Qend_glyph_layout) | |
| 5762 || EQ (property, Qglyph_layout) | |
| 5763 || EQ (property, Qbegin_glyph) | |
| 5764 || EQ (property, Qend_glyph) | |
| 5765 || EQ (property, Qstart_open) | |
| 5766 || EQ (property, Qend_open) | |
| 5767 || EQ (property, Qstart_closed) | |
| 5768 || EQ (property, Qend_closed) | |
| 5769 || EQ (property, Qkeymap)) | |
| 5770 return Qunbound; | |
| 5771 | |
| 5772 retval = external_remprop (extent_plist_addr (e), property, 0, | |
| 5773 ERROR_ME); | |
| 5774 if (retval) | |
| 5775 signal_extent_property_changed (e, property, 1); | |
| 5776 return retval ? Qt : Qnil; | |
| 5777 } | |
| 428 | 5778 |
| 5779 if (EQ (property, Qread_only)) | |
| 826 | 5780 { |
| 5781 set_extent_read_only (e, value); | |
| 5782 signal_change = 1; | |
| 5783 } | |
| 428 | 5784 else if (EQ (property, Qunique)) |
| 826 | 5785 { |
| 5786 extent_unique_p (e) = !NILP (value); | |
| 5787 signal_change = 1; | |
| 5788 } | |
| 428 | 5789 else if (EQ (property, Qduplicable)) |
| 826 | 5790 { |
| 5791 extent_duplicable_p (e) = !NILP (value); | |
| 5792 signal_change = 1; | |
| 5793 } | |
| 428 | 5794 else if (EQ (property, Qinvisible)) |
| 5795 set_extent_invisible (e, value); | |
| 5796 else if (EQ (property, Qdetachable)) | |
| 826 | 5797 { |
| 5798 extent_detachable_p (e) = !NILP (value); | |
| 5799 signal_change = 1; | |
| 5800 } | |
| 428 | 5801 else if (EQ (property, Qdetached)) |
| 5802 { | |
| 5803 if (NILP (value)) | |
| 826 | 5804 invalid_operation ("can only set `detached' to t", Qunbound); |
| 428 | 5805 Fdetach_extent (extent); |
| 5806 } | |
| 5807 else if (EQ (property, Qdestroyed)) | |
| 5808 { | |
| 5809 if (NILP (value)) | |
| 826 | 5810 invalid_operation ("can only set `destroyed' to t", Qunbound); |
| 428 | 5811 Fdelete_extent (extent); |
| 5812 } | |
| 5813 else if (EQ (property, Qpriority)) | |
| 5814 Fset_extent_priority (extent, value); | |
| 5815 else if (EQ (property, Qface)) | |
| 5816 Fset_extent_face (extent, value); | |
| 5817 else if (EQ (property, Qinitial_redisplay_function)) | |
| 5818 Fset_extent_initial_redisplay_function (extent, value); | |
| 5819 else if (EQ (property, Qbefore_change_functions)) | |
| 826 | 5820 { |
| 5821 set_extent_before_change_functions (e, value); | |
| 5822 signal_change = 1; | |
| 5823 } | |
| 428 | 5824 else if (EQ (property, Qafter_change_functions)) |
| 826 | 5825 { |
| 5826 set_extent_after_change_functions (e, value); | |
| 5827 signal_change = 1; | |
| 5828 } | |
| 428 | 5829 else if (EQ (property, Qmouse_face)) |
| 5830 Fset_extent_mouse_face (extent, value); | |
| 5831 /* Obsolete: */ | |
| 5832 else if (EQ (property, Qhighlight)) | |
| 5833 Fset_extent_mouse_face (extent, Qhighlight); | |
| 5834 else if (EQ (property, Qbegin_glyph_layout)) | |
| 5835 Fset_extent_begin_glyph_layout (extent, value); | |
| 5836 else if (EQ (property, Qend_glyph_layout)) | |
| 5837 Fset_extent_end_glyph_layout (extent, value); | |
| 5838 /* For backwards compatibility. We use begin glyph because it is by | |
| 5839 far the more used of the two. */ | |
| 5840 else if (EQ (property, Qglyph_layout)) | |
| 5841 Fset_extent_begin_glyph_layout (extent, value); | |
| 5842 else if (EQ (property, Qbegin_glyph)) | |
| 5843 Fset_extent_begin_glyph (extent, value, Qnil); | |
| 5844 else if (EQ (property, Qend_glyph)) | |
| 5845 Fset_extent_end_glyph (extent, value, Qnil); | |
| 5846 else if (EQ (property, Qstart_open)) | |
| 5847 set_extent_openness (e, !NILP (value), -1); | |
| 5848 else if (EQ (property, Qend_open)) | |
| 5849 set_extent_openness (e, -1, !NILP (value)); | |
| 5850 /* Support (but don't document...) the obvious *_closed antonyms. */ | |
| 5851 else if (EQ (property, Qstart_closed)) | |
| 5852 set_extent_openness (e, NILP (value), -1); | |
| 5853 else if (EQ (property, Qend_closed)) | |
| 5854 set_extent_openness (e, -1, NILP (value)); | |
| 5855 else | |
| 5856 { | |
| 5857 if (EQ (property, Qkeymap)) | |
| 5858 while (!NILP (value) && NILP (Fkeymapp (value))) | |
| 5859 value = wrong_type_argument (Qkeymapp, value); | |
| 5860 | |
| 5861 external_plist_put (extent_plist_addr (e), property, value, 0, ERROR_ME); | |
| 826 | 5862 signal_change = 1; |
| 428 | 5863 } |
| 5864 | |
| 826 | 5865 if (signal_change) |
| 5866 signal_extent_property_changed (e, property, 1); | |
| 428 | 5867 return value; |
| 5868 } | |
| 5869 | |
| 5870 DEFUN ("set-extent-properties", Fset_extent_properties, 2, 2, 0, /* | |
| 5871 Change some properties of EXTENT. | |
| 5872 PLIST is a property list. | |
| 5873 For a list of built-in properties, see `set-extent-property'. | |
| 5874 */ | |
| 5875 (extent, plist)) | |
| 5876 { | |
| 5877 /* This function can GC, if one of the properties is `keymap' */ | |
| 5878 Lisp_Object property, value; | |
| 5879 struct gcpro gcpro1; | |
| 5880 GCPRO1 (plist); | |
| 5881 | |
| 5882 plist = Fcopy_sequence (plist); | |
| 5883 Fcanonicalize_plist (plist, Qnil); | |
| 5884 | |
| 5885 while (!NILP (plist)) | |
| 5886 { | |
| 5887 property = Fcar (plist); plist = Fcdr (plist); | |
| 5888 value = Fcar (plist); plist = Fcdr (plist); | |
| 5889 Fset_extent_property (extent, property, value); | |
| 5890 } | |
| 5891 UNGCPRO; | |
| 5892 return Qnil; | |
| 5893 } | |
| 5894 | |
| 5895 DEFUN ("extent-property", Fextent_property, 2, 3, 0, /* | |
| 5896 Return EXTENT's value for property PROPERTY. | |
| 444 | 5897 If no such property exists, DEFAULT is returned. |
| 428 | 5898 See `set-extent-property' for the built-in property names. |
| 5899 */ | |
| 5900 (extent, property, default_)) | |
| 5901 { | |
| 5902 EXTENT e = decode_extent (extent, 0); | |
| 5903 | |
| 5904 if (EQ (property, Qdetached)) | |
| 5905 return extent_detached_p (e) ? Qt : Qnil; | |
| 5906 else if (EQ (property, Qdestroyed)) | |
| 5907 return !EXTENT_LIVE_P (e) ? Qt : Qnil; | |
| 5908 else if (EQ (property, Qstart_open)) | |
| 5909 return extent_normal_field (e, start_open) ? Qt : Qnil; | |
| 5910 else if (EQ (property, Qend_open)) | |
| 5911 return extent_normal_field (e, end_open) ? Qt : Qnil; | |
| 5912 else if (EQ (property, Qunique)) | |
| 5913 return extent_normal_field (e, unique) ? Qt : Qnil; | |
| 5914 else if (EQ (property, Qduplicable)) | |
| 5915 return extent_normal_field (e, duplicable) ? Qt : Qnil; | |
| 5916 else if (EQ (property, Qdetachable)) | |
| 5917 return extent_normal_field (e, detachable) ? Qt : Qnil; | |
| 5918 /* Support (but don't document...) the obvious *_closed antonyms. */ | |
| 5919 else if (EQ (property, Qstart_closed)) | |
| 5920 return extent_start_open_p (e) ? Qnil : Qt; | |
| 5921 else if (EQ (property, Qend_closed)) | |
| 5922 return extent_end_open_p (e) ? Qnil : Qt; | |
| 5923 else if (EQ (property, Qpriority)) | |
| 5924 return make_int (extent_priority (e)); | |
| 5925 else if (EQ (property, Qread_only)) | |
| 5926 return extent_read_only (e); | |
| 5927 else if (EQ (property, Qinvisible)) | |
| 5928 return extent_invisible (e); | |
| 5929 else if (EQ (property, Qface)) | |
| 5930 return Fextent_face (extent); | |
| 5931 else if (EQ (property, Qinitial_redisplay_function)) | |
| 5932 return extent_initial_redisplay_function (e); | |
| 5933 else if (EQ (property, Qbefore_change_functions)) | |
| 5934 return extent_before_change_functions (e); | |
| 5935 else if (EQ (property, Qafter_change_functions)) | |
| 5936 return extent_after_change_functions (e); | |
| 5937 else if (EQ (property, Qmouse_face)) | |
| 5938 return Fextent_mouse_face (extent); | |
| 5939 /* Obsolete: */ | |
| 5940 else if (EQ (property, Qhighlight)) | |
| 5941 return !NILP (Fextent_mouse_face (extent)) ? Qt : Qnil; | |
| 5942 else if (EQ (property, Qbegin_glyph_layout)) | |
| 5943 return Fextent_begin_glyph_layout (extent); | |
| 5944 else if (EQ (property, Qend_glyph_layout)) | |
| 5945 return Fextent_end_glyph_layout (extent); | |
| 5946 /* For backwards compatibility. We use begin glyph because it is by | |
| 5947 far the more used of the two. */ | |
| 5948 else if (EQ (property, Qglyph_layout)) | |
| 5949 return Fextent_begin_glyph_layout (extent); | |
| 5950 else if (EQ (property, Qbegin_glyph)) | |
| 5951 return extent_begin_glyph (e); | |
| 5952 else if (EQ (property, Qend_glyph)) | |
| 5953 return extent_end_glyph (e); | |
| 5954 else | |
| 5955 { | |
| 5956 Lisp_Object value = external_plist_get (extent_plist_addr (e), | |
| 5957 property, 0, ERROR_ME); | |
| 5958 return UNBOUNDP (value) ? default_ : value; | |
| 5959 } | |
| 5960 } | |
| 5961 | |
| 826 | 5962 static void |
| 5963 extent_properties (EXTENT e, Lisp_Object_pair_dynarr *props) | |
| 5964 { | |
| 5965 Lisp_Object face, anc_obj; | |
| 428 | 5966 glyph_layout layout; |
| 826 | 5967 EXTENT anc; |
| 5968 | |
| 5969 #define ADD_PROP(miftaaH, maal) \ | |
| 5970 do { \ | |
| 5971 Lisp_Object_pair p; \ | |
| 5972 p.key = miftaaH; \ | |
| 5973 p.value = maal; \ | |
| 5974 Dynarr_add (props, p); \ | |
| 5975 } while (0) | |
| 5976 | |
| 428 | 5977 if (!EXTENT_LIVE_P (e)) |
| 826 | 5978 { |
| 5979 ADD_PROP (Qdestroyed, Qt); | |
| 5980 return; | |
| 5981 } | |
| 428 | 5982 |
| 5983 anc = extent_ancestor (e); | |
| 793 | 5984 anc_obj = wrap_extent (anc); |
| 428 | 5985 |
| 5986 /* For efficiency, use the ancestor for all properties except detached */ | |
| 826 | 5987 { |
| 5988 EXTERNAL_PROPERTY_LIST_LOOP_3 (key, value, extent_plist_slot (anc)) | |
| 5989 ADD_PROP (key, value); | |
| 5990 } | |
| 428 | 5991 |
| 5992 if (!NILP (face = Fextent_face (anc_obj))) | |
| 826 | 5993 ADD_PROP (Qface, face); |
| 428 | 5994 |
| 5995 if (!NILP (face = Fextent_mouse_face (anc_obj))) | |
| 826 | 5996 ADD_PROP (Qmouse_face, face); |
| 428 | 5997 |
| 5998 if ((layout = (glyph_layout) extent_begin_glyph_layout (anc)) != GL_TEXT) | |
| 5999 { | |
| 6000 Lisp_Object sym = glyph_layout_to_symbol (layout); | |
| 826 | 6001 ADD_PROP (Qglyph_layout, sym); /* compatibility */ |
| 6002 ADD_PROP (Qbegin_glyph_layout, sym); | |
| 428 | 6003 } |
| 6004 | |
| 6005 if ((layout = (glyph_layout) extent_end_glyph_layout (anc)) != GL_TEXT) | |
| 826 | 6006 ADD_PROP (Qend_glyph_layout, glyph_layout_to_symbol (layout)); |
| 428 | 6007 |
| 6008 if (!NILP (extent_end_glyph (anc))) | |
| 826 | 6009 ADD_PROP (Qend_glyph, extent_end_glyph (anc)); |
| 428 | 6010 |
| 6011 if (!NILP (extent_begin_glyph (anc))) | |
| 826 | 6012 ADD_PROP (Qbegin_glyph, extent_begin_glyph (anc)); |
| 428 | 6013 |
| 6014 if (extent_priority (anc) != 0) | |
| 826 | 6015 ADD_PROP (Qpriority, make_int (extent_priority (anc))); |
| 428 | 6016 |
| 6017 if (!NILP (extent_initial_redisplay_function (anc))) | |
| 826 | 6018 ADD_PROP (Qinitial_redisplay_function, |
| 6019 extent_initial_redisplay_function (anc)); | |
| 428 | 6020 |
| 6021 if (!NILP (extent_before_change_functions (anc))) | |
| 826 | 6022 ADD_PROP (Qbefore_change_functions, extent_before_change_functions (anc)); |
| 428 | 6023 |
| 6024 if (!NILP (extent_after_change_functions (anc))) | |
| 826 | 6025 ADD_PROP (Qafter_change_functions, extent_after_change_functions (anc)); |
| 428 | 6026 |
| 6027 if (!NILP (extent_invisible (anc))) | |
| 826 | 6028 ADD_PROP (Qinvisible, extent_invisible (anc)); |
| 428 | 6029 |
| 6030 if (!NILP (extent_read_only (anc))) | |
| 826 | 6031 ADD_PROP (Qread_only, extent_read_only (anc)); |
| 428 | 6032 |
| 6033 if (extent_normal_field (anc, end_open)) | |
| 826 | 6034 ADD_PROP (Qend_open, Qt); |
| 428 | 6035 |
| 6036 if (extent_normal_field (anc, start_open)) | |
| 826 | 6037 ADD_PROP (Qstart_open, Qt); |
| 428 | 6038 |
| 6039 if (extent_normal_field (anc, detachable)) | |
| 826 | 6040 ADD_PROP (Qdetachable, Qt); |
| 428 | 6041 |
| 6042 if (extent_normal_field (anc, duplicable)) | |
| 826 | 6043 ADD_PROP (Qduplicable, Qt); |
| 428 | 6044 |
| 6045 if (extent_normal_field (anc, unique)) | |
| 826 | 6046 ADD_PROP (Qunique, Qt); |
| 428 | 6047 |
| 6048 /* detached is not an inherited property */ | |
| 6049 if (extent_detached_p (e)) | |
| 826 | 6050 ADD_PROP (Qdetached, Qt); |
| 6051 | |
| 6052 #undef ADD_PROP | |
| 6053 } | |
| 6054 | |
| 6055 DEFUN ("extent-properties", Fextent_properties, 1, 1, 0, /* | |
| 6056 Return a property list of the attributes of EXTENT. | |
| 6057 Do not modify this list; use `set-extent-property' instead. | |
| 6058 */ | |
| 6059 (extent)) | |
| 6060 { | |
| 6061 EXTENT e; | |
| 6062 Lisp_Object result = Qnil; | |
| 6063 Lisp_Object_pair_dynarr *props; | |
| 6064 int i; | |
| 6065 | |
| 6066 CHECK_EXTENT (extent); | |
| 6067 e = XEXTENT (extent); | |
| 6068 props = Dynarr_new (Lisp_Object_pair); | |
| 6069 extent_properties (e, props); | |
| 6070 | |
| 6071 for (i = 0; i < Dynarr_length (props); i++) | |
| 6072 result = cons3 (Dynarr_at (props, i).key, Dynarr_at (props, i).value, | |
| 6073 result); | |
| 6074 | |
| 6075 Dynarr_free (props); | |
| 428 | 6076 return result; |
| 6077 } | |
| 6078 | |
| 6079 | |
| 6080 /************************************************************************/ | |
| 6081 /* highlighting */ | |
| 6082 /************************************************************************/ | |
| 6083 | |
| 6084 /* The display code looks into the Vlast_highlighted_extent variable to | |
| 6085 correctly display highlighted extents. This updates that variable, | |
| 6086 and marks the appropriate buffers as needing some redisplay. | |
| 6087 */ | |
| 6088 static void | |
| 6089 do_highlight (Lisp_Object extent_obj, int highlight_p) | |
| 6090 { | |
| 6091 if (( highlight_p && (EQ (Vlast_highlighted_extent, extent_obj))) || | |
| 6092 (!highlight_p && (EQ (Vlast_highlighted_extent, Qnil)))) | |
| 6093 return; | |
| 6094 if (EXTENTP (Vlast_highlighted_extent) && | |
| 6095 EXTENT_LIVE_P (XEXTENT (Vlast_highlighted_extent))) | |
| 6096 { | |
| 6097 /* do not recurse on descendants. Only one extent is highlighted | |
| 6098 at a time. */ | |
| 826 | 6099 /* A bit of a lie. */ |
| 6100 signal_extent_property_changed (XEXTENT (Vlast_highlighted_extent), | |
| 6101 Qface, 0); | |
| 428 | 6102 } |
| 6103 Vlast_highlighted_extent = Qnil; | |
| 6104 if (!NILP (extent_obj) | |
| 6105 && BUFFERP (extent_object (XEXTENT (extent_obj))) | |
| 6106 && highlight_p) | |
| 6107 { | |
| 826 | 6108 signal_extent_property_changed (XEXTENT (extent_obj), Qface, 0); |
| 428 | 6109 Vlast_highlighted_extent = extent_obj; |
| 6110 } | |
| 6111 } | |
| 6112 | |
| 6113 DEFUN ("force-highlight-extent", Fforce_highlight_extent, 1, 2, 0, /* | |
| 6114 Highlight or unhighlight the given extent. | |
| 6115 If the second arg is non-nil, it will be highlighted, else dehighlighted. | |
| 6116 This is the same as `highlight-extent', except that it will work even | |
| 6117 on extents without the `mouse-face' property. | |
| 6118 */ | |
| 6119 (extent, highlight_p)) | |
| 6120 { | |
| 6121 if (NILP (extent)) | |
| 6122 highlight_p = Qnil; | |
| 6123 else | |
| 793 | 6124 extent = wrap_extent (decode_extent (extent, DE_MUST_BE_ATTACHED)); |
| 428 | 6125 do_highlight (extent, !NILP (highlight_p)); |
| 6126 return Qnil; | |
| 6127 } | |
| 6128 | |
| 6129 DEFUN ("highlight-extent", Fhighlight_extent, 1, 2, 0, /* | |
| 6130 Highlight EXTENT, if it is highlightable. | |
| 6131 \(that is, if it has the `mouse-face' property). | |
| 6132 If the second arg is non-nil, it will be highlighted, else dehighlighted. | |
| 6133 Highlighted extents are displayed as if they were merged with the face | |
| 6134 or faces specified by the `mouse-face' property. | |
| 6135 */ | |
| 6136 (extent, highlight_p)) | |
| 6137 { | |
| 6138 if (EXTENTP (extent) && NILP (extent_mouse_face (XEXTENT (extent)))) | |
| 6139 return Qnil; | |
| 6140 else | |
| 6141 return Fforce_highlight_extent (extent, highlight_p); | |
| 6142 } | |
| 6143 | |
| 6144 | |
| 6145 /************************************************************************/ | |
| 6146 /* strings and extents */ | |
| 6147 /************************************************************************/ | |
| 6148 | |
| 6149 /* copy/paste hooks */ | |
| 6150 | |
| 6151 static int | |
| 826 | 6152 run_extent_copy_paste_internal (EXTENT e, Charxpos from, Charxpos to, |
| 428 | 6153 Lisp_Object object, |
| 6154 Lisp_Object prop) | |
| 6155 { | |
| 6156 /* This function can GC */ | |
| 6157 Lisp_Object extent; | |
| 6158 Lisp_Object copy_fn; | |
| 793 | 6159 extent = wrap_extent (e); |
| 428 | 6160 copy_fn = Fextent_property (extent, prop, Qnil); |
| 6161 if (!NILP (copy_fn)) | |
| 6162 { | |
| 6163 Lisp_Object flag; | |
| 6164 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 6165 GCPRO3 (extent, copy_fn, object); | |
| 6166 if (BUFFERP (object)) | |
| 6167 flag = call3_in_buffer (XBUFFER (object), copy_fn, extent, | |
| 6168 make_int (from), make_int (to)); | |
| 6169 else | |
| 6170 flag = call3 (copy_fn, extent, make_int (from), make_int (to)); | |
| 6171 UNGCPRO; | |
| 6172 if (NILP (flag) || !EXTENT_LIVE_P (XEXTENT (extent))) | |
| 6173 return 0; | |
| 6174 } | |
| 6175 return 1; | |
| 6176 } | |
| 6177 | |
| 6178 static int | |
| 826 | 6179 run_extent_copy_function (EXTENT e, Bytexpos from, Bytexpos to) |
| 428 | 6180 { |
| 6181 Lisp_Object object = extent_object (e); | |
| 6182 /* This function can GC */ | |
| 6183 return run_extent_copy_paste_internal | |
| 826 | 6184 (e, buffer_or_string_bytexpos_to_charxpos (object, from), |
| 6185 buffer_or_string_bytexpos_to_charxpos (object, to), object, | |
| 428 | 6186 Qcopy_function); |
| 6187 } | |
| 6188 | |
| 6189 static int | |
| 826 | 6190 run_extent_paste_function (EXTENT e, Bytexpos from, Bytexpos to, |
| 428 | 6191 Lisp_Object object) |
| 6192 { | |
| 6193 /* This function can GC */ | |
| 6194 return run_extent_copy_paste_internal | |
| 826 | 6195 (e, buffer_or_string_bytexpos_to_charxpos (object, from), |
| 6196 buffer_or_string_bytexpos_to_charxpos (object, to), object, | |
| 428 | 6197 Qpaste_function); |
| 6198 } | |
| 6199 | |
| 826 | 6200 static int |
| 6201 run_extent_paste_function_char (EXTENT e, Charxpos from, Charxpos to, | |
| 6202 Lisp_Object object) | |
| 6203 { | |
| 6204 /* This function can GC */ | |
| 6205 return run_extent_copy_paste_internal (e, from, to, object, Qpaste_function); | |
| 6206 } | |
| 6207 | |
| 428 | 6208 static Lisp_Object |
| 826 | 6209 insert_extent (EXTENT extent, Bytexpos new_start, Bytexpos new_end, |
| 428 | 6210 Lisp_Object object, int run_hooks) |
| 6211 { | |
| 6212 /* This function can GC */ | |
| 6213 if (!EQ (extent_object (extent), object)) | |
| 6214 goto copy_it; | |
| 6215 | |
| 6216 if (extent_detached_p (extent)) | |
| 6217 { | |
| 6218 if (run_hooks && | |
| 6219 !run_extent_paste_function (extent, new_start, new_end, object)) | |
| 6220 /* The paste-function said don't re-attach this extent here. */ | |
| 6221 return Qnil; | |
| 6222 else | |
| 826 | 6223 set_extent_endpoints (extent, new_start, new_end, Qnil); |
| 428 | 6224 } |
| 6225 else | |
| 6226 { | |
| 826 | 6227 Bytexpos exstart = extent_endpoint_byte (extent, 0); |
| 6228 Bytexpos exend = extent_endpoint_byte (extent, 1); | |
| 428 | 6229 |
| 6230 if (exend < new_start || exstart > new_end) | |
| 6231 goto copy_it; | |
| 6232 else | |
| 6233 { | |
| 6234 new_start = min (exstart, new_start); | |
| 6235 new_end = max (exend, new_end); | |
| 6236 if (exstart != new_start || exend != new_end) | |
| 826 | 6237 set_extent_endpoints (extent, new_start, new_end, Qnil); |
| 428 | 6238 } |
| 6239 } | |
| 6240 | |
| 793 | 6241 return wrap_extent (extent); |
| 428 | 6242 |
| 6243 copy_it: | |
| 6244 if (run_hooks && | |
| 6245 !run_extent_paste_function (extent, new_start, new_end, object)) | |
| 6246 /* The paste-function said don't attach a copy of the extent here. */ | |
| 6247 return Qnil; | |
| 6248 else | |
| 793 | 6249 return wrap_extent (copy_extent (extent, new_start, new_end, object)); |
| 428 | 6250 } |
| 6251 | |
| 6252 DEFUN ("insert-extent", Finsert_extent, 1, 5, 0, /* | |
| 6253 Insert EXTENT from START to END in BUFFER-OR-STRING. | |
| 6254 BUFFER-OR-STRING defaults to the current buffer if omitted. | |
| 826 | 6255 If EXTENT is already on the same object, and overlaps or is adjacent to |
| 6256 the given range, its range is merely extended to include the new range. | |
| 6257 Otherwise, a copy is made of the extent at the new position and object. | |
| 6258 When a copy is made, the new extent is returned, copy/paste hooks are run, | |
| 6259 and the change is noted for undo recording. When no copy is made, nil is | |
| 6260 returned. See documentation on `detach-extent' for a discussion of undo | |
| 6261 recording. | |
| 6262 | |
| 428 | 6263 The fourth arg, NO-HOOKS, can be used to inhibit the running of the |
| 826 | 6264 extent's `paste-function' property if it has one. |
| 6265 | |
| 6266 It's not really clear why this function exists any more. It was a holdover | |
| 6267 from a much older implementation of extents, before extents could really | |
| 6268 exist on strings. | |
| 428 | 6269 */ |
| 6270 (extent, start, end, no_hooks, buffer_or_string)) | |
| 6271 { | |
| 6272 EXTENT ext = decode_extent (extent, 0); | |
| 6273 Lisp_Object copy; | |
| 826 | 6274 Bytexpos s, e; |
| 428 | 6275 |
| 6276 buffer_or_string = decode_buffer_or_string (buffer_or_string); | |
| 6277 get_buffer_or_string_range_byte (buffer_or_string, start, end, &s, &e, | |
| 6278 GB_ALLOW_PAST_ACCESSIBLE); | |
| 6279 | |
| 6280 copy = insert_extent (ext, s, e, buffer_or_string, NILP (no_hooks)); | |
| 6281 if (EXTENTP (copy)) | |
| 6282 { | |
| 6283 if (extent_duplicable_p (XEXTENT (copy))) | |
| 6284 record_extent (copy, 1); | |
| 6285 } | |
| 6286 return copy; | |
| 6287 } | |
| 6288 | |
| 6289 | |
| 6290 /* adding buffer extents to a string */ | |
| 6291 | |
| 6292 struct add_string_extents_arg | |
| 6293 { | |
| 826 | 6294 Bytexpos from; |
| 428 | 6295 Bytecount length; |
| 6296 Lisp_Object string; | |
| 6297 }; | |
| 6298 | |
| 6299 static int | |
| 6300 add_string_extents_mapper (EXTENT extent, void *arg) | |
| 6301 { | |
| 6302 /* This function can GC */ | |
| 6303 struct add_string_extents_arg *closure = | |
| 6304 (struct add_string_extents_arg *) arg; | |
| 826 | 6305 Bytecount start = extent_endpoint_byte (extent, 0) - closure->from; |
| 6306 Bytecount end = extent_endpoint_byte (extent, 1) - closure->from; | |
| 428 | 6307 |
| 6308 if (extent_duplicable_p (extent)) | |
| 6309 { | |
| 6310 start = max (start, 0); | |
| 6311 end = min (end, closure->length); | |
| 6312 | |
| 6313 /* Run the copy-function to give an extent the option of | |
| 6314 not being copied into the string (or kill ring). | |
| 6315 */ | |
| 6316 if (extent_duplicable_p (extent) && | |
| 6317 !run_extent_copy_function (extent, start + closure->from, | |
| 6318 end + closure->from)) | |
| 6319 return 0; | |
| 6320 copy_extent (extent, start, end, closure->string); | |
| 6321 } | |
| 6322 | |
| 6323 return 0; | |
| 6324 } | |
| 6325 | |
| 826 | 6326 struct add_string_extents_the_hard_way_arg |
| 6327 { | |
| 6328 Charxpos from; | |
| 6329 Charcount length; | |
| 6330 Lisp_Object string; | |
| 6331 }; | |
| 6332 | |
| 6333 static int | |
| 6334 add_string_extents_the_hard_way_mapper (EXTENT extent, void *arg) | |
| 6335 { | |
| 6336 /* This function can GC */ | |
| 6337 struct add_string_extents_arg *closure = | |
| 6338 (struct add_string_extents_arg *) arg; | |
| 6339 Charcount start = extent_endpoint_char (extent, 0) - closure->from; | |
| 6340 Charcount end = extent_endpoint_char (extent, 1) - closure->from; | |
| 6341 | |
| 6342 if (extent_duplicable_p (extent)) | |
| 6343 { | |
| 6344 start = max (start, 0); | |
| 6345 end = min (end, closure->length); | |
| 6346 | |
| 6347 /* Run the copy-function to give an extent the option of | |
| 6348 not being copied into the string (or kill ring). | |
| 6349 */ | |
| 6350 if (extent_duplicable_p (extent) && | |
| 6351 !run_extent_copy_function (extent, start + closure->from, | |
| 6352 end + closure->from)) | |
| 6353 return 0; | |
| 6354 copy_extent (extent, | |
| 6355 string_index_char_to_byte (closure->string, start), | |
| 6356 string_index_char_to_byte (closure->string, end), | |
| 6357 closure->string); | |
| 6358 } | |
| 6359 | |
| 6360 return 0; | |
| 6361 } | |
| 6362 | |
| 428 | 6363 /* Add the extents in buffer BUF from OPOINT to OPOINT+LENGTH to |
| 6364 the string STRING. */ | |
| 6365 void | |
| 826 | 6366 add_string_extents (Lisp_Object string, struct buffer *buf, Bytexpos opoint, |
| 428 | 6367 Bytecount length) |
| 6368 { | |
| 6369 /* This function can GC */ | |
| 6370 struct gcpro gcpro1, gcpro2; | |
| 6371 Lisp_Object buffer; | |
| 6372 | |
| 771 | 6373 buffer = wrap_buffer (buf); |
| 428 | 6374 GCPRO2 (buffer, string); |
| 826 | 6375 |
| 6376 if (XSTRING_FORMAT (string) == BUF_FORMAT (buf)) | |
| 6377 { | |
| 6378 struct add_string_extents_arg closure; | |
| 6379 closure.from = opoint; | |
| 6380 closure.length = length; | |
| 6381 closure.string = string; | |
| 6382 map_extents (opoint, opoint + length, add_string_extents_mapper, | |
| 6383 (void *) &closure, buffer, 0, | |
| 6384 /* ignore extents that just abut the region */ | |
| 6385 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN | | |
| 6386 /* we are calling E-Lisp (the extent's copy function) | |
| 6387 so anything might happen */ | |
| 6388 ME_MIGHT_CALL_ELISP); | |
| 6389 } | |
| 6390 else | |
| 6391 { | |
| 6392 struct add_string_extents_the_hard_way_arg closure; | |
| 6393 closure.from = bytebpos_to_charbpos (buf, opoint); | |
| 6394 closure.length = (bytebpos_to_charbpos (buf, opoint + length) - | |
| 6395 closure.from); | |
| 6396 closure.string = string; | |
| 6397 | |
| 6398 /* If the string and buffer are in different formats, things get | |
| 6399 tricky; the only reasonable way to do the operation is entirely in | |
| 6400 char offsets, which are invariant to format changes. In practice, | |
| 6401 this won't be time-consuming because the byte/char conversions are | |
| 6402 mostly in the buffer, which will be in a fixed-width format. */ | |
| 6403 map_extents (opoint, opoint + length, | |
| 6404 add_string_extents_the_hard_way_mapper, | |
| 6405 (void *) &closure, buffer, 0, | |
| 6406 /* ignore extents that just abut the region */ | |
| 6407 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN | | |
| 6408 /* we are calling E-Lisp (the extent's copy function) | |
| 6409 so anything might happen */ | |
| 6410 ME_MIGHT_CALL_ELISP); | |
| 6411 | |
| 6412 } | |
| 6413 | |
| 428 | 6414 UNGCPRO; |
| 6415 } | |
| 6416 | |
| 6417 struct splice_in_string_extents_arg | |
| 6418 { | |
| 6419 Bytecount pos; | |
| 6420 Bytecount length; | |
| 826 | 6421 Bytexpos opoint; |
| 428 | 6422 Lisp_Object buffer; |
| 6423 }; | |
| 6424 | |
| 6425 static int | |
| 6426 splice_in_string_extents_mapper (EXTENT extent, void *arg) | |
| 6427 { | |
| 6428 /* This function can GC */ | |
| 6429 struct splice_in_string_extents_arg *closure = | |
| 6430 (struct splice_in_string_extents_arg *) arg; | |
| 6431 /* BASE_START and BASE_END are the limits in the buffer of the string | |
| 6432 that was just inserted. | |
| 826 | 6433 |
| 428 | 6434 NEW_START and NEW_END are the prospective buffer positions of the |
| 6435 extent that is going into the buffer. */ | |
| 826 | 6436 Bytexpos base_start = closure->opoint; |
| 6437 Bytexpos base_end = base_start + closure->length; | |
| 6438 Bytexpos new_start = (base_start + extent_endpoint_byte (extent, 0) - | |
| 6439 closure->pos); | |
| 6440 Bytexpos new_end = (base_start + extent_endpoint_byte (extent, 1) - | |
| 428 | 6441 closure->pos); |
| 6442 | |
| 6443 if (new_start < base_start) | |
| 6444 new_start = base_start; | |
| 6445 if (new_end > base_end) | |
| 6446 new_end = base_end; | |
| 6447 if (new_end <= new_start) | |
| 6448 return 0; | |
| 6449 | |
| 6450 if (!extent_duplicable_p (extent)) | |
| 6451 return 0; | |
| 6452 | |
| 6453 if (!inside_undo && | |
| 6454 !run_extent_paste_function (extent, new_start, new_end, | |
| 6455 closure->buffer)) | |
| 6456 return 0; | |
| 6457 copy_extent (extent, new_start, new_end, closure->buffer); | |
| 6458 | |
| 6459 return 0; | |
| 6460 } | |
| 6461 | |
| 826 | 6462 struct splice_in_string_extents_the_hard_way_arg |
| 6463 { | |
| 6464 Charcount pos; | |
| 6465 Charcount length; | |
| 6466 Charxpos opoint; | |
| 6467 Lisp_Object buffer; | |
| 6468 }; | |
| 6469 | |
| 6470 static int | |
| 6471 splice_in_string_extents_the_hard_way_mapper (EXTENT extent, void *arg) | |
| 6472 { | |
| 6473 /* This function can GC */ | |
| 6474 struct splice_in_string_extents_arg *closure = | |
| 6475 (struct splice_in_string_extents_arg *) arg; | |
| 6476 /* BASE_START and BASE_END are the limits in the buffer of the string | |
| 6477 that was just inserted. | |
| 6478 | |
| 6479 NEW_START and NEW_END are the prospective buffer positions of the | |
| 6480 extent that is going into the buffer. */ | |
| 6481 Charxpos base_start = closure->opoint; | |
| 6482 Charxpos base_end = base_start + closure->length; | |
| 6483 Charxpos new_start = (base_start + extent_endpoint_char (extent, 0) - | |
| 6484 closure->pos); | |
| 6485 Charxpos new_end = (base_start + extent_endpoint_char (extent, 1) - | |
| 6486 closure->pos); | |
| 6487 | |
| 6488 if (new_start < base_start) | |
| 6489 new_start = base_start; | |
| 6490 if (new_end > base_end) | |
| 6491 new_end = base_end; | |
| 6492 if (new_end <= new_start) | |
| 6493 return 0; | |
| 6494 | |
| 6495 if (!extent_duplicable_p (extent)) | |
| 6496 return 0; | |
| 6497 | |
| 6498 if (!inside_undo && | |
| 6499 !run_extent_paste_function_char (extent, new_start, new_end, | |
| 6500 closure->buffer)) | |
| 6501 return 0; | |
| 6502 copy_extent (extent, | |
| 6503 charbpos_to_bytebpos (XBUFFER (closure->buffer), new_start), | |
| 6504 charbpos_to_bytebpos (XBUFFER (closure->buffer), new_end), | |
| 6505 closure->buffer); | |
| 6506 | |
| 6507 return 0; | |
| 6508 } | |
| 6509 | |
| 428 | 6510 /* We have just inserted a section of STRING (starting at POS, of |
| 6511 length LENGTH) into buffer BUF at OPOINT. Do whatever is necessary | |
| 6512 to get the string's extents into the buffer. */ | |
| 6513 | |
| 6514 void | |
| 6515 splice_in_string_extents (Lisp_Object string, struct buffer *buf, | |
| 826 | 6516 Bytexpos opoint, Bytecount length, Bytecount pos) |
| 6517 { | |
| 428 | 6518 struct gcpro gcpro1, gcpro2; |
| 793 | 6519 Lisp_Object buffer = wrap_buffer (buf); |
| 6520 | |
| 428 | 6521 GCPRO2 (buffer, string); |
| 826 | 6522 if (XSTRING_FORMAT (string) == BUF_FORMAT (buf)) |
| 6523 { | |
| 6524 struct splice_in_string_extents_arg closure; | |
| 6525 closure.opoint = opoint; | |
| 6526 closure.pos = pos; | |
| 6527 closure.length = length; | |
| 6528 closure.buffer = buffer; | |
| 6529 map_extents (pos, pos + length, | |
| 6530 splice_in_string_extents_mapper, | |
| 6531 (void *) &closure, string, 0, | |
| 6532 /* ignore extents that just abut the region */ | |
| 6533 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN | | |
| 6534 /* we are calling E-Lisp (the extent's copy function) | |
| 6535 so anything might happen */ | |
| 6536 ME_MIGHT_CALL_ELISP); | |
| 6537 } | |
| 6538 else | |
| 6539 { | |
| 6540 struct splice_in_string_extents_the_hard_way_arg closure; | |
| 6541 closure.opoint = bytebpos_to_charbpos (buf, opoint); | |
| 6542 closure.pos = string_index_byte_to_char (string, pos); | |
| 6543 closure.length = string_offset_byte_to_char_len (string, pos, length); | |
| 6544 closure.buffer = buffer; | |
| 6545 | |
| 6546 /* If the string and buffer are in different formats, things get | |
| 6547 tricky; the only reasonable way to do the operation is entirely in | |
| 6548 char offsets, which are invariant to format changes. In practice, | |
| 6549 this won't be time-consuming because the byte/char conversions are | |
| 6550 mostly in the buffer, which will be in a fixed-width format. */ | |
| 6551 map_extents (pos, pos + length, | |
| 6552 splice_in_string_extents_the_hard_way_mapper, | |
| 6553 (void *) &closure, string, 0, | |
| 6554 /* ignore extents that just abut the region */ | |
| 6555 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN | | |
| 6556 /* we are calling E-Lisp (the extent's copy function) | |
| 6557 so anything might happen */ | |
| 6558 ME_MIGHT_CALL_ELISP); | |
| 6559 | |
| 6560 } | |
| 428 | 6561 UNGCPRO; |
| 6562 } | |
| 6563 | |
| 6564 struct copy_string_extents_arg | |
| 6565 { | |
| 6566 Bytecount new_pos; | |
| 6567 Bytecount old_pos; | |
| 6568 Bytecount length; | |
| 6569 Lisp_Object new_string; | |
| 6570 }; | |
| 6571 | |
| 6572 struct copy_string_extents_1_arg | |
| 6573 { | |
| 6574 Lisp_Object parent_in_question; | |
| 6575 EXTENT found_extent; | |
| 6576 }; | |
| 6577 | |
| 6578 static int | |
| 6579 copy_string_extents_mapper (EXTENT extent, void *arg) | |
| 6580 { | |
| 6581 struct copy_string_extents_arg *closure = | |
| 6582 (struct copy_string_extents_arg *) arg; | |
| 6583 Bytecount old_start, old_end, new_start, new_end; | |
| 6584 | |
| 826 | 6585 old_start = extent_endpoint_byte (extent, 0); |
| 6586 old_end = extent_endpoint_byte (extent, 1); | |
| 428 | 6587 |
| 6588 old_start = max (closure->old_pos, old_start); | |
| 6589 old_end = min (closure->old_pos + closure->length, old_end); | |
| 6590 | |
| 6591 if (old_start >= old_end) | |
| 6592 return 0; | |
| 6593 | |
| 6594 new_start = old_start + closure->new_pos - closure->old_pos; | |
| 6595 new_end = old_end + closure->new_pos - closure->old_pos; | |
| 6596 | |
| 6597 copy_extent (extent, new_start, new_end, closure->new_string); | |
| 6598 return 0; | |
| 6599 } | |
| 6600 | |
| 6601 /* The string NEW_STRING was partially constructed from OLD_STRING. | |
| 6602 In particular, the section of length LEN starting at NEW_POS in | |
| 6603 NEW_STRING came from the section of the same length starting at | |
| 6604 OLD_POS in OLD_STRING. Copy the extents as appropriate. */ | |
| 6605 | |
| 6606 void | |
| 6607 copy_string_extents (Lisp_Object new_string, Lisp_Object old_string, | |
| 6608 Bytecount new_pos, Bytecount old_pos, | |
| 6609 Bytecount length) | |
| 6610 { | |
| 6611 struct copy_string_extents_arg closure; | |
| 6612 struct gcpro gcpro1, gcpro2; | |
| 6613 | |
| 6614 closure.new_pos = new_pos; | |
| 6615 closure.old_pos = old_pos; | |
| 6616 closure.new_string = new_string; | |
| 6617 closure.length = length; | |
| 6618 GCPRO2 (new_string, old_string); | |
| 826 | 6619 map_extents (old_pos, old_pos + length, |
| 6620 copy_string_extents_mapper, | |
| 6621 (void *) &closure, old_string, 0, | |
| 6622 /* ignore extents that just abut the region */ | |
| 6623 ME_END_CLOSED | ME_ALL_EXTENTS_OPEN | | |
| 6624 /* we are calling E-Lisp (the extent's copy function) | |
| 6625 so anything might happen */ | |
| 6626 ME_MIGHT_CALL_ELISP); | |
| 428 | 6627 UNGCPRO; |
| 6628 } | |
| 6629 | |
| 6630 /* Checklist for sanity checking: | |
| 6631 - {kill, yank, copy} at {open, closed} {start, end} of {writable, read-only} extent | |
| 6632 - {kill, copy} & yank {once, repeatedly} duplicable extent in {same, different} buffer | |
| 6633 */ | |
| 6634 | |
| 6635 | |
| 6636 /************************************************************************/ | |
| 6637 /* text properties */ | |
| 6638 /************************************************************************/ | |
| 6639 | |
| 6640 /* Text properties | |
| 6641 Originally this stuff was implemented in lisp (all of the functionality | |
| 6642 exists to make that possible) but speed was a problem. | |
| 6643 */ | |
| 6644 | |
| 6645 Lisp_Object Qtext_prop; | |
| 6646 Lisp_Object Qtext_prop_extent_paste_function; | |
| 6647 | |
| 826 | 6648 /* Retrieve the value of the property PROP of the text at position POSITION |
| 6649 in OBJECT. TEXT-PROPS-ONLY means only look at extents with the | |
| 6650 `text-prop' property, i.e. extents created by the text property | |
| 6651 routines. Otherwise, all extents are examined. &&#### finish Note that | |
| 6652 the default extent_at_flag is EXTENT_AT_DEFAULT (same as | |
| 6653 EXTENT_AT_AFTER). */ | |
| 6654 Lisp_Object | |
| 6655 get_char_property (Bytexpos position, Lisp_Object prop, | |
| 6656 Lisp_Object object, enum extent_at_flag fl, | |
| 6657 int text_props_only) | |
| 428 | 6658 { |
| 6659 Lisp_Object extent; | |
| 6660 | |
| 6661 /* text_props_only specifies whether we only consider text-property | |
| 3025 | 6662 extents (those with the `text-prop' property set) or all extents. */ |
| 428 | 6663 if (!text_props_only) |
| 826 | 6664 extent = extent_at (position, object, prop, 0, fl, 0); |
| 428 | 6665 else |
| 6666 { | |
| 6667 EXTENT prior = 0; | |
| 6668 while (1) | |
| 6669 { | |
| 826 | 6670 extent = extent_at (position, object, Qtext_prop, prior, fl, 0); |
| 428 | 6671 if (NILP (extent)) |
| 6672 return Qnil; | |
| 6673 if (EQ (prop, Fextent_property (extent, Qtext_prop, Qnil))) | |
| 6674 break; | |
| 6675 prior = XEXTENT (extent); | |
| 6676 } | |
| 6677 } | |
| 6678 | |
| 6679 if (!NILP (extent)) | |
| 6680 return Fextent_property (extent, prop, Qnil); | |
| 6681 if (!NILP (Vdefault_text_properties)) | |
| 6682 return Fplist_get (Vdefault_text_properties, prop, Qnil); | |
| 6683 return Qnil; | |
| 6684 } | |
| 6685 | |
| 6686 static Lisp_Object | |
| 826 | 6687 get_char_property_char (Lisp_Object pos, Lisp_Object prop, Lisp_Object object, |
| 6688 Lisp_Object at_flag, int text_props_only) | |
| 6689 { | |
| 6690 Bytexpos position; | |
| 428 | 6691 int invert = 0; |
| 6692 | |
| 6693 object = decode_buffer_or_string (object); | |
| 6694 position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD); | |
| 6695 | |
| 6696 /* We canonicalize the start/end-open/closed properties to the | |
| 6697 non-default version -- "adding" the default property really | |
| 6698 needs to remove the non-default one. See below for more | |
| 6699 on this. */ | |
| 6700 if (EQ (prop, Qstart_closed)) | |
| 6701 { | |
| 6702 prop = Qstart_open; | |
| 6703 invert = 1; | |
| 6704 } | |
| 6705 | |
| 6706 if (EQ (prop, Qend_open)) | |
| 6707 { | |
| 6708 prop = Qend_closed; | |
| 6709 invert = 1; | |
| 6710 } | |
| 6711 | |
| 6712 { | |
| 6713 Lisp_Object val = | |
| 826 | 6714 get_char_property (position, prop, object, |
| 6715 decode_extent_at_flag (at_flag), | |
| 6716 text_props_only); | |
| 428 | 6717 if (invert) |
| 6718 val = NILP (val) ? Qt : Qnil; | |
| 6719 return val; | |
| 6720 } | |
| 6721 } | |
| 6722 | |
| 6723 DEFUN ("get-text-property", Fget_text_property, 2, 4, 0, /* | |
| 6724 Return the value of the PROP property at the given position. | |
| 6725 Optional arg OBJECT specifies the buffer or string to look in, and | |
| 6726 defaults to the current buffer. | |
| 6727 Optional arg AT-FLAG controls what it means for a property to be "at" | |
| 6728 a position, and has the same meaning as in `extent-at'. | |
| 6729 This examines only those properties added with `put-text-property'. | |
| 6730 See also `get-char-property'. | |
| 6731 */ | |
| 6732 (pos, prop, object, at_flag)) | |
| 6733 { | |
| 826 | 6734 return get_char_property_char (pos, prop, object, at_flag, 1); |
| 428 | 6735 } |
| 6736 | |
| 6737 DEFUN ("get-char-property", Fget_char_property, 2, 4, 0, /* | |
| 6738 Return the value of the PROP property at the given position. | |
| 6739 Optional arg OBJECT specifies the buffer or string to look in, and | |
| 6740 defaults to the current buffer. | |
| 6741 Optional arg AT-FLAG controls what it means for a property to be "at" | |
| 6742 a position, and has the same meaning as in `extent-at'. | |
| 6743 This examines properties on all extents. | |
| 6744 See also `get-text-property'. | |
| 6745 */ | |
| 6746 (pos, prop, object, at_flag)) | |
| 6747 { | |
| 826 | 6748 return get_char_property_char (pos, prop, object, at_flag, 0); |
| 428 | 6749 } |
| 6750 | |
| 6751 /* About start/end-open/closed: | |
| 6752 | |
| 6753 These properties have to be handled specially because of their | |
| 6754 strange behavior. If I put the "start-open" property on a region, | |
| 6755 then *all* text-property extents in the region have to have their | |
| 6756 start be open. This is unlike all other properties, which don't | |
| 6757 affect the extents of text properties other than their own. | |
| 6758 | |
| 6759 So: | |
| 6760 | |
| 6761 1) We have to map start-closed to (not start-open) and end-open | |
| 6762 to (not end-closed) -- i.e. adding the default is really the | |
| 6763 same as remove the non-default property. It won't work, for | |
| 6764 example, to have both "start-open" and "start-closed" on | |
| 6765 the same region. | |
| 6766 2) Whenever we add one of these properties, we go through all | |
| 6767 text-property extents in the region and set the appropriate | |
| 6768 open/closedness on them. | |
| 6769 3) Whenever we change a text-property extent for a property, | |
| 6770 we have to make sure we set the open/closedness properly. | |
| 6771 | |
| 6772 (2) and (3) together rely on, and maintain, the invariant | |
| 6773 that the open/closedness of text-property extents is correct | |
| 6774 at the beginning and end of each operation. | |
| 6775 */ | |
| 6776 | |
| 6777 struct put_text_prop_arg | |
| 6778 { | |
| 6779 Lisp_Object prop, value; /* The property and value we are storing */ | |
| 826 | 6780 Bytexpos start, end; /* The region into which we are storing it */ |
| 428 | 6781 Lisp_Object object; |
| 6782 Lisp_Object the_extent; /* Our chosen extent; this is used for | |
| 6783 communication between subsequent passes. */ | |
| 6784 int changed_p; /* Output: whether we have modified anything */ | |
| 6785 }; | |
| 6786 | |
| 6787 static int | |
| 6788 put_text_prop_mapper (EXTENT e, void *arg) | |
| 6789 { | |
| 6790 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg; | |
| 6791 | |
| 6792 Lisp_Object object = closure->object; | |
| 6793 Lisp_Object value = closure->value; | |
| 826 | 6794 Bytexpos e_start, e_end; |
| 6795 Bytexpos start = closure->start; | |
| 6796 Bytexpos end = closure->end; | |
| 428 | 6797 Lisp_Object extent, e_val; |
| 6798 int is_eq; | |
| 6799 | |
| 793 | 6800 extent = wrap_extent (e); |
| 428 | 6801 |
| 3025 | 6802 /* Note: in some cases when the property itself is `start-open' |
| 6803 or `end-closed', the checks to set the openness may do a bit | |
| 428 | 6804 of extra work; but it won't hurt because we then fix up the |
| 6805 openness later on in put_text_prop_openness_mapper(). */ | |
| 6806 if (!EQ (Fextent_property (extent, Qtext_prop, Qnil), closure->prop)) | |
| 6807 /* It's not for this property; do nothing. */ | |
| 6808 return 0; | |
| 6809 | |
| 826 | 6810 e_start = extent_endpoint_byte (e, 0); |
| 6811 e_end = extent_endpoint_byte (e, 1); | |
| 428 | 6812 e_val = Fextent_property (extent, closure->prop, Qnil); |
| 6813 is_eq = EQ (value, e_val); | |
| 6814 | |
| 6815 if (!NILP (value) && NILP (closure->the_extent) && is_eq) | |
| 6816 { | |
| 6817 /* We want there to be an extent here at the end, and we haven't picked | |
| 6818 one yet, so use this one. Extend it as necessary. We only reuse an | |
| 6819 extent which has an EQ value for the prop in question to avoid | |
| 6820 side-effecting the kill ring (that is, we never change the property | |
| 6821 on an extent after it has been created.) | |
| 6822 */ | |
| 6823 if (e_start != start || e_end != end) | |
| 6824 { | |
| 826 | 6825 Bytexpos new_start = min (e_start, start); |
| 6826 Bytexpos new_end = max (e_end, end); | |
| 428 | 6827 set_extent_endpoints (e, new_start, new_end, Qnil); |
| 6828 /* If we changed the endpoint, then we need to set its | |
| 6829 openness. */ | |
| 6830 set_extent_openness (e, new_start != e_start | |
| 826 | 6831 ? !NILP (get_char_property |
| 428 | 6832 (start, Qstart_open, object, |
| 6833 EXTENT_AT_AFTER, 1)) : -1, | |
| 6834 new_end != e_end | |
| 826 | 6835 ? NILP (get_char_property |
| 6836 (prev_bytexpos (object, end), | |
| 6837 Qend_closed, object, | |
| 428 | 6838 EXTENT_AT_AFTER, 1)) |
| 6839 : -1); | |
| 6840 closure->changed_p = 1; | |
| 6841 } | |
| 6842 closure->the_extent = extent; | |
| 6843 } | |
| 6844 | |
| 6845 /* Even if we're adding a prop, at this point, we want all other extents of | |
| 6846 this prop to go away (as now they overlap). So the theory here is that, | |
| 6847 when we are adding a prop to a region that has multiple (disjoint) | |
| 6848 occurrences of that prop in it already, we pick one of those and extend | |
| 6849 it, and remove the others. | |
| 6850 */ | |
| 6851 | |
| 6852 else if (EQ (extent, closure->the_extent)) | |
| 6853 { | |
| 6854 /* just in case map-extents hits it again (does that happen?) */ | |
| 6855 ; | |
| 6856 } | |
| 6857 else if (e_start >= start && e_end <= end) | |
| 6858 { | |
| 6859 /* Extent is contained in region; remove it. Don't destroy or modify | |
| 6860 it, because we don't want to change the attributes pointed to by the | |
| 6861 duplicates in the kill ring. | |
| 6862 */ | |
| 6863 extent_detach (e); | |
| 6864 closure->changed_p = 1; | |
| 6865 } | |
| 6866 else if (!NILP (closure->the_extent) && | |
| 6867 is_eq && | |
| 6868 e_start <= end && | |
| 6869 e_end >= start) | |
| 6870 { | |
| 6871 EXTENT te = XEXTENT (closure->the_extent); | |
| 6872 /* This extent overlaps, and has the same prop/value as the extent we've | |
| 6873 decided to reuse, so we can remove this existing extent as well (the | |
| 6874 whole thing, even the part outside of the region) and extend | |
| 6875 the-extent to cover it, resulting in the minimum number of extents in | |
| 6876 the buffer. | |
| 6877 */ | |
| 826 | 6878 Bytexpos the_start = extent_endpoint_byte (te, 0); |
| 6879 Bytexpos the_end = extent_endpoint_byte (te, 1); | |
| 428 | 6880 if (e_start != the_start && /* note AND not OR -- hmm, why is this |
| 6881 the case? I think it's because the | |
| 6882 assumption that the text-property | |
| 6883 extents don't overlap makes it | |
| 6884 OK; changing it to an OR would | |
| 6885 result in changed_p sometimes getting | |
| 6886 falsely marked. Is this bad? */ | |
| 6887 e_end != the_end) | |
| 6888 { | |
| 826 | 6889 Bytexpos new_start = min (e_start, the_start); |
| 6890 Bytexpos new_end = max (e_end, the_end); | |
| 428 | 6891 set_extent_endpoints (te, new_start, new_end, Qnil); |
| 6892 /* If we changed the endpoint, then we need to set its | |
| 6893 openness. We are setting the endpoint to be the same as | |
| 6894 that of the extent we're about to remove, and we assume | |
| 6895 (the invariant mentioned above) that extent has the | |
| 6896 proper endpoint setting, so we just use it. */ | |
| 6897 set_extent_openness (te, new_start != e_start ? | |
| 6898 (int) extent_start_open_p (e) : -1, | |
| 6899 new_end != e_end ? | |
| 6900 (int) extent_end_open_p (e) : -1); | |
| 6901 closure->changed_p = 1; | |
| 6902 } | |
| 6903 extent_detach (e); | |
| 6904 } | |
| 6905 else if (e_end <= end) | |
| 6906 { | |
| 6907 /* Extent begins before start but ends before end, so we can just | |
| 6908 decrease its end position. | |
| 6909 */ | |
| 6910 if (e_end != start) | |
| 6911 { | |
| 6912 set_extent_endpoints (e, e_start, start, Qnil); | |
| 826 | 6913 set_extent_openness (e, -1, |
| 6914 NILP (get_char_property | |
| 6915 (prev_bytexpos (object, start), | |
| 6916 Qend_closed, object, | |
| 6917 EXTENT_AT_AFTER, 1))); | |
| 428 | 6918 closure->changed_p = 1; |
| 6919 } | |
| 6920 } | |
| 6921 else if (e_start >= start) | |
| 6922 { | |
| 6923 /* Extent ends after end but begins after start, so we can just | |
| 6924 increase its start position. | |
| 6925 */ | |
| 6926 if (e_start != end) | |
| 6927 { | |
| 6928 set_extent_endpoints (e, end, e_end, Qnil); | |
| 826 | 6929 set_extent_openness (e, !NILP (get_char_property |
| 428 | 6930 (end, Qstart_open, object, |
| 6931 EXTENT_AT_AFTER, 1)), -1); | |
| 6932 closure->changed_p = 1; | |
| 6933 } | |
| 6934 } | |
| 6935 else | |
| 6936 { | |
| 6937 /* Otherwise, `extent' straddles the region. We need to split it. | |
| 6938 */ | |
| 6939 set_extent_endpoints (e, e_start, start, Qnil); | |
| 826 | 6940 set_extent_openness (e, -1, NILP (get_char_property |
| 6941 (prev_bytexpos (object, start), | |
| 6942 Qend_closed, object, | |
| 428 | 6943 EXTENT_AT_AFTER, 1))); |
| 6944 set_extent_openness (copy_extent (e, end, e_end, extent_object (e)), | |
| 826 | 6945 !NILP (get_char_property |
| 428 | 6946 (end, Qstart_open, object, |
| 6947 EXTENT_AT_AFTER, 1)), -1); | |
| 6948 closure->changed_p = 1; | |
| 6949 } | |
| 6950 | |
| 6951 return 0; /* to continue mapping. */ | |
| 6952 } | |
| 6953 | |
| 6954 static int | |
| 6955 put_text_prop_openness_mapper (EXTENT e, void *arg) | |
| 6956 { | |
| 6957 struct put_text_prop_arg *closure = (struct put_text_prop_arg *) arg; | |
| 826 | 6958 Bytexpos e_start, e_end; |
| 6959 Bytexpos start = closure->start; | |
| 6960 Bytexpos end = closure->end; | |
| 793 | 6961 Lisp_Object extent = wrap_extent (e); |
| 6962 | |
| 826 | 6963 e_start = extent_endpoint_byte (e, 0); |
| 6964 e_end = extent_endpoint_byte (e, 1); | |
| 428 | 6965 |
| 6966 if (NILP (Fextent_property (extent, Qtext_prop, Qnil))) | |
| 6967 { | |
| 6968 /* It's not a text-property extent; do nothing. */ | |
| 6969 ; | |
| 6970 } | |
| 6971 /* Note end conditions and NILP/!NILP's carefully. */ | |
| 6972 else if (EQ (closure->prop, Qstart_open) | |
| 6973 && e_start >= start && e_start < end) | |
| 6974 set_extent_openness (e, !NILP (closure->value), -1); | |
| 6975 else if (EQ (closure->prop, Qend_closed) | |
| 6976 && e_end > start && e_end <= end) | |
| 6977 set_extent_openness (e, -1, NILP (closure->value)); | |
| 6978 | |
| 6979 return 0; /* to continue mapping. */ | |
| 6980 } | |
| 6981 | |
| 6982 static int | |
| 826 | 6983 put_text_prop (Bytexpos start, Bytexpos end, Lisp_Object object, |
| 428 | 6984 Lisp_Object prop, Lisp_Object value, |
| 6985 int duplicable_p) | |
| 6986 { | |
| 6987 /* This function can GC */ | |
| 6988 struct put_text_prop_arg closure; | |
| 6989 | |
| 6990 if (start == end) /* There are no characters in the region. */ | |
| 6991 return 0; | |
| 6992 | |
| 6993 /* convert to the non-default versions, since a nil property is | |
| 6994 the same as it not being present. */ | |
| 6995 if (EQ (prop, Qstart_closed)) | |
| 6996 { | |
| 6997 prop = Qstart_open; | |
| 6998 value = NILP (value) ? Qt : Qnil; | |
| 6999 } | |
| 7000 else if (EQ (prop, Qend_open)) | |
| 7001 { | |
| 7002 prop = Qend_closed; | |
| 7003 value = NILP (value) ? Qt : Qnil; | |
| 7004 } | |
| 7005 | |
| 7006 value = canonicalize_extent_property (prop, value); | |
| 7007 | |
| 7008 closure.prop = prop; | |
| 7009 closure.value = value; | |
| 7010 closure.start = start; | |
| 7011 closure.end = end; | |
| 7012 closure.object = object; | |
| 7013 closure.changed_p = 0; | |
| 7014 closure.the_extent = Qnil; | |
| 7015 | |
| 826 | 7016 map_extents (start, end, |
| 7017 put_text_prop_mapper, | |
| 7018 (void *) &closure, object, 0, | |
| 7019 /* get all extents that abut the region */ | |
| 7020 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED | | |
| 7021 #if 0 | |
| 7022 /* it might move the SOE because the callback function calls | |
| 7023 get_char_property(), which calls extent_at(), which calls | |
| 7024 map_extents() | |
| 7025 | |
| 7026 #### this was comment out before, and nothing seemed broken; | |
| 7027 #### but when I added the above comment and uncommented it, | |
| 7028 #### text property operations (e.g. font-lock) suddenly | |
| 7029 #### became *WAY* slow, and dominated font-lock, when a | |
| 7030 #### single extent spanning the entire buffer | |
| 7031 #### existed. --ben */ | |
| 7032 ME_MIGHT_MOVE_SOE | | |
| 7033 #endif | |
| 7034 /* it might QUIT or error if the user has | |
| 7035 fucked with the extent plist. */ | |
| 7036 ME_MIGHT_THROW | | |
| 7037 ME_MIGHT_MODIFY_EXTENTS); | |
| 428 | 7038 |
| 7039 /* If we made it through the loop without reusing an extent | |
| 7040 (and we want there to be one) make it now. | |
| 7041 */ | |
| 7042 if (!NILP (value) && NILP (closure.the_extent)) | |
| 7043 { | |
| 826 | 7044 Lisp_Object extent = |
| 7045 wrap_extent (make_extent (object, start, end)); | |
| 793 | 7046 |
| 428 | 7047 closure.changed_p = 1; |
| 7048 Fset_extent_property (extent, Qtext_prop, prop); | |
| 7049 Fset_extent_property (extent, prop, value); | |
| 7050 if (duplicable_p) | |
| 7051 { | |
| 7052 extent_duplicable_p (XEXTENT (extent)) = 1; | |
| 7053 Fset_extent_property (extent, Qpaste_function, | |
| 7054 Qtext_prop_extent_paste_function); | |
| 7055 } | |
| 7056 set_extent_openness (XEXTENT (extent), | |
| 826 | 7057 !NILP (get_char_property |
| 428 | 7058 (start, Qstart_open, object, |
| 7059 EXTENT_AT_AFTER, 1)), | |
| 826 | 7060 NILP (get_char_property |
| 7061 (prev_bytexpos (object, end), | |
| 7062 Qend_closed, object, | |
| 428 | 7063 EXTENT_AT_AFTER, 1))); |
| 7064 } | |
| 7065 | |
| 7066 if (EQ (prop, Qstart_open) || EQ (prop, Qend_closed)) | |
| 7067 { | |
| 826 | 7068 map_extents (start, end, put_text_prop_openness_mapper, |
| 7069 (void *) &closure, object, 0, | |
| 7070 /* get all extents that abut the region */ | |
| 7071 ME_ALL_EXTENTS_CLOSED | ME_END_CLOSED | | |
| 7072 ME_MIGHT_MODIFY_EXTENTS); | |
| 428 | 7073 } |
| 7074 | |
| 7075 return closure.changed_p; | |
| 7076 } | |
| 7077 | |
| 7078 DEFUN ("put-text-property", Fput_text_property, 4, 5, 0, /* | |
| 7079 Adds the given property/value to all characters in the specified region. | |
| 7080 The property is conceptually attached to the characters rather than the | |
| 7081 region. The properties are copied when the characters are copied/pasted. | |
| 7082 Fifth argument OBJECT is the buffer or string containing the text, and | |
| 7083 defaults to the current buffer. | |
| 7084 */ | |
| 7085 (start, end, prop, value, object)) | |
| 7086 { | |
| 7087 /* This function can GC */ | |
| 826 | 7088 Bytexpos s, e; |
| 428 | 7089 |
| 7090 object = decode_buffer_or_string (object); | |
| 7091 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0); | |
| 7092 put_text_prop (s, e, object, prop, value, 1); | |
| 7093 return prop; | |
| 7094 } | |
| 7095 | |
| 7096 DEFUN ("put-nonduplicable-text-property", Fput_nonduplicable_text_property, | |
| 7097 4, 5, 0, /* | |
| 7098 Adds the given property/value to all characters in the specified region. | |
| 7099 The property is conceptually attached to the characters rather than the | |
| 7100 region, however the properties will not be copied when the characters | |
| 7101 are copied. | |
| 7102 Fifth argument OBJECT is the buffer or string containing the text, and | |
| 7103 defaults to the current buffer. | |
| 7104 */ | |
| 7105 (start, end, prop, value, object)) | |
| 7106 { | |
| 7107 /* This function can GC */ | |
| 826 | 7108 Bytexpos s, e; |
| 428 | 7109 |
| 7110 object = decode_buffer_or_string (object); | |
| 7111 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0); | |
| 7112 put_text_prop (s, e, object, prop, value, 0); | |
| 7113 return prop; | |
| 7114 } | |
| 7115 | |
| 7116 DEFUN ("add-text-properties", Fadd_text_properties, 3, 4, 0, /* | |
| 7117 Add properties to the characters from START to END. | |
| 7118 The third argument PROPS is a property list specifying the property values | |
| 7119 to add. The optional fourth argument, OBJECT, is the buffer or string | |
| 7120 containing the text and defaults to the current buffer. Returns t if | |
| 7121 any property was changed, nil otherwise. | |
| 7122 */ | |
| 7123 (start, end, props, object)) | |
| 7124 { | |
| 7125 /* This function can GC */ | |
| 7126 int changed = 0; | |
| 826 | 7127 Bytexpos s, e; |
| 428 | 7128 |
| 7129 object = decode_buffer_or_string (object); | |
| 7130 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0); | |
| 7131 CHECK_LIST (props); | |
| 7132 for (; !NILP (props); props = Fcdr (Fcdr (props))) | |
| 7133 { | |
| 7134 Lisp_Object prop = XCAR (props); | |
| 7135 Lisp_Object value = Fcar (XCDR (props)); | |
| 7136 changed |= put_text_prop (s, e, object, prop, value, 1); | |
| 7137 } | |
| 7138 return changed ? Qt : Qnil; | |
| 7139 } | |
| 7140 | |
| 7141 | |
| 7142 DEFUN ("add-nonduplicable-text-properties", Fadd_nonduplicable_text_properties, | |
| 7143 3, 4, 0, /* | |
| 7144 Add nonduplicable properties to the characters from START to END. | |
| 7145 \(The properties will not be copied when the characters are copied.) | |
| 7146 The third argument PROPS is a property list specifying the property values | |
| 7147 to add. The optional fourth argument, OBJECT, is the buffer or string | |
| 7148 containing the text and defaults to the current buffer. Returns t if | |
| 7149 any property was changed, nil otherwise. | |
| 7150 */ | |
| 7151 (start, end, props, object)) | |
| 7152 { | |
| 7153 /* This function can GC */ | |
| 7154 int changed = 0; | |
| 826 | 7155 Bytexpos s, e; |
| 428 | 7156 |
| 7157 object = decode_buffer_or_string (object); | |
| 7158 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0); | |
| 7159 CHECK_LIST (props); | |
| 7160 for (; !NILP (props); props = Fcdr (Fcdr (props))) | |
| 7161 { | |
| 7162 Lisp_Object prop = XCAR (props); | |
| 7163 Lisp_Object value = Fcar (XCDR (props)); | |
| 7164 changed |= put_text_prop (s, e, object, prop, value, 0); | |
| 7165 } | |
| 7166 return changed ? Qt : Qnil; | |
| 7167 } | |
| 7168 | |
| 7169 DEFUN ("remove-text-properties", Fremove_text_properties, 3, 4, 0, /* | |
| 7170 Remove the given properties from all characters in the specified region. | |
| 7171 PROPS should be a plist, but the values in that plist are ignored (treated | |
| 7172 as nil). Returns t if any property was changed, nil otherwise. | |
| 7173 Fourth argument OBJECT is the buffer or string containing the text, and | |
| 7174 defaults to the current buffer. | |
| 7175 */ | |
| 7176 (start, end, props, object)) | |
| 7177 { | |
| 7178 /* This function can GC */ | |
| 7179 int changed = 0; | |
| 826 | 7180 Bytexpos s, e; |
| 428 | 7181 |
| 7182 object = decode_buffer_or_string (object); | |
| 7183 get_buffer_or_string_range_byte (object, start, end, &s, &e, 0); | |
| 7184 CHECK_LIST (props); | |
| 7185 for (; !NILP (props); props = Fcdr (Fcdr (props))) | |
| 7186 { | |
| 7187 Lisp_Object prop = XCAR (props); | |
| 7188 changed |= put_text_prop (s, e, object, prop, Qnil, 1); | |
| 7189 } | |
| 7190 return changed ? Qt : Qnil; | |
| 7191 } | |
| 7192 | |
| 7193 /* Whenever a text-prop extent is pasted into a buffer (via `yank' or `insert' | |
| 7194 or whatever) we attach the properties to the buffer by calling | |
| 7195 `put-text-property' instead of by simply allowing the extent to be copied or | |
| 7196 re-attached. Then we return nil, telling the extents code not to attach it | |
| 7197 again. By handing the insertion hackery in this way, we make kill/yank | |
| 7198 behave consistently with put-text-property and not fragment the extents | |
| 7199 (since text-prop extents must partition, not overlap). | |
| 7200 | |
| 7201 The lisp implementation of this was probably fast enough, but since I moved | |
| 7202 the rest of the put-text-prop code here, I moved this as well for | |
| 7203 completeness. | |
| 7204 */ | |
| 7205 DEFUN ("text-prop-extent-paste-function", Ftext_prop_extent_paste_function, | |
| 7206 3, 3, 0, /* | |
| 7207 Used as the `paste-function' property of `text-prop' extents. | |
| 7208 */ | |
| 7209 (extent, from, to)) | |
| 7210 { | |
| 7211 /* This function can GC */ | |
| 7212 Lisp_Object prop, val; | |
| 7213 | |
| 7214 prop = Fextent_property (extent, Qtext_prop, Qnil); | |
| 7215 if (NILP (prop)) | |
| 563 | 7216 signal_error (Qinternal_error, |
| 442 | 7217 "Internal error: no text-prop", extent); |
| 428 | 7218 val = Fextent_property (extent, prop, Qnil); |
| 7219 #if 0 | |
| 7220 /* removed by bill perry, 2/9/97 | |
| 7221 ** This little bit of code would not allow you to have a text property | |
| 7222 ** with a value of Qnil. This is bad bad bad. | |
| 7223 */ | |
| 7224 if (NILP (val)) | |
| 563 | 7225 signal_error_2 (Qinternal_error, |
| 442 | 7226 "Internal error: no text-prop", |
| 7227 extent, prop); | |
| 428 | 7228 #endif |
| 7229 Fput_text_property (from, to, prop, val, Qnil); | |
| 7230 return Qnil; /* important! */ | |
| 7231 } | |
| 7232 | |
| 826 | 7233 Bytexpos |
| 2506 | 7234 next_previous_single_property_change (Bytexpos pos, Lisp_Object prop, |
| 7235 Lisp_Object object, Bytexpos limit, | |
| 7236 Boolint next, Boolint text_props_only) | |
| 826 | 7237 { |
| 7238 Lisp_Object extent, value; | |
| 7239 int limit_was_nil; | |
| 2506 | 7240 enum extent_at_flag at_flag = next ? EXTENT_AT_AFTER : EXTENT_AT_BEFORE; |
| 826 | 7241 if (limit < 0) |
| 7242 { | |
| 2506 | 7243 limit = (next ? buffer_or_string_accessible_end_byte : |
| 7244 buffer_or_string_accessible_begin_byte) (object); | |
| 826 | 7245 limit_was_nil = 1; |
| 7246 } | |
| 7247 else | |
| 7248 limit_was_nil = 0; | |
| 7249 | |
| 2506 | 7250 /* Retrieve initial property value to compare against */ |
| 7251 extent = extent_at (pos, object, prop, 0, at_flag, 0); | |
| 7252 /* If we only want text-prop extents, ignore all others */ | |
| 7253 if (text_props_only && !NILP (extent) && | |
| 7254 NILP (Fextent_property (extent, Qtext_prop, Qnil))) | |
| 7255 extent = Qnil; | |
| 826 | 7256 if (!NILP (extent)) |
| 7257 value = Fextent_property (extent, prop, Qnil); | |
| 7258 else | |
| 7259 value = Qnil; | |
| 7260 | |
| 7261 while (1) | |
| 7262 { | |
| 2506 | 7263 pos = (next ? extent_find_end_of_run : extent_find_beginning_of_run) |
| 7264 (object, pos, 1); | |
| 7265 if (next ? pos >= limit : pos <= limit) | |
| 7266 break; /* property is the same all the way to the beginning/end */ | |
| 7267 extent = extent_at (pos, object, prop, 0, at_flag, 0); | |
| 7268 /* If we only want text-prop extents, ignore all others */ | |
| 7269 if (text_props_only && !NILP (extent) && | |
| 7270 NILP (Fextent_property (extent, Qtext_prop, Qnil))) | |
| 7271 extent = Qnil; | |
| 826 | 7272 if ((NILP (extent) && !NILP (value)) || |
| 7273 (!NILP (extent) && !EQ (value, | |
| 7274 Fextent_property (extent, prop, Qnil)))) | |
| 7275 return pos; | |
| 7276 } | |
| 7277 | |
| 7278 if (limit_was_nil) | |
| 7279 return -1; | |
| 7280 else | |
| 7281 return limit; | |
| 7282 } | |
| 7283 | |
| 2506 | 7284 static Lisp_Object |
| 7285 next_previous_single_property_change_fn (Lisp_Object pos, Lisp_Object prop, | |
| 7286 Lisp_Object object, Lisp_Object limit, | |
| 7287 Boolint next, Boolint text_props_only) | |
| 7288 { | |
| 7289 Bytexpos xpos; | |
| 7290 Bytexpos blim; | |
| 7291 | |
| 7292 object = decode_buffer_or_string (object); | |
| 7293 xpos = get_buffer_or_string_pos_byte (object, pos, 0); | |
| 7294 blim = !NILP (limit) ? get_buffer_or_string_pos_byte (object, limit, 0) : -1; | |
| 7295 blim = next_previous_single_property_change (xpos, prop, object, blim, | |
| 7296 next, text_props_only); | |
| 7297 | |
| 7298 if (blim < 0) | |
| 7299 return Qnil; | |
| 826 | 7300 else |
| 2506 | 7301 return make_int (buffer_or_string_bytexpos_to_charxpos (object, blim)); |
| 826 | 7302 } |
| 428 | 7303 |
| 7304 DEFUN ("next-single-property-change", Fnext_single_property_change, | |
| 7305 2, 4, 0, /* | |
| 7306 Return the position of next property change for a specific property. | |
| 7307 Scans characters forward from POS till it finds a change in the PROP | |
| 7308 property, then returns the position of the change. The optional third | |
| 7309 argument OBJECT is the buffer or string to scan (defaults to the current | |
| 7310 buffer). | |
| 7311 The property values are compared with `eq'. | |
| 444 | 7312 Return nil if the property is constant all the way to the end of OBJECT. |
| 428 | 7313 If the value is non-nil, it is a position greater than POS, never equal. |
| 7314 | |
| 7315 If the optional fourth argument LIMIT is non-nil, don't search | |
| 7316 past position LIMIT; return LIMIT if nothing is found before LIMIT. | |
| 7317 If two or more extents with conflicting non-nil values for PROP overlap | |
| 7318 a particular character, it is undefined which value is considered to be | |
| 7319 the value of PROP. (Note that this situation will not happen if you always | |
| 7320 use the text-property primitives.) | |
| 2506 | 7321 |
| 7322 This function looks only at extents created using the text-property primitives. | |
| 7323 To look at all extents, use `next-single-char-property-change'. | |
| 428 | 7324 */ |
| 7325 (pos, prop, object, limit)) | |
| 7326 { | |
| 2506 | 7327 return next_previous_single_property_change_fn (pos, prop, object, limit, |
| 7328 1, 1); | |
| 826 | 7329 } |
| 428 | 7330 |
| 7331 DEFUN ("previous-single-property-change", Fprevious_single_property_change, | |
| 7332 2, 4, 0, /* | |
| 7333 Return the position of next property change for a specific property. | |
| 7334 Scans characters backward from POS till it finds a change in the PROP | |
| 7335 property, then returns the position of the change. The optional third | |
| 7336 argument OBJECT is the buffer or string to scan (defaults to the current | |
| 7337 buffer). | |
| 7338 The property values are compared with `eq'. | |
| 444 | 7339 Return nil if the property is constant all the way to the start of OBJECT. |
| 428 | 7340 If the value is non-nil, it is a position less than POS, never equal. |
| 7341 | |
| 7342 If the optional fourth argument LIMIT is non-nil, don't search back | |
| 7343 past position LIMIT; return LIMIT if nothing is found until LIMIT. | |
| 7344 If two or more extents with conflicting non-nil values for PROP overlap | |
| 7345 a particular character, it is undefined which value is considered to be | |
| 7346 the value of PROP. (Note that this situation will not happen if you always | |
| 7347 use the text-property primitives.) | |
| 2506 | 7348 |
| 7349 This function looks only at extents created using the text-property primitives. | |
| 7350 To look at all extents, use `next-single-char-property-change'. | |
| 7351 */ | |
| 7352 (pos, prop, object, limit)) | |
| 7353 { | |
| 7354 return next_previous_single_property_change_fn (pos, prop, object, limit, | |
| 7355 0, 1); | |
| 7356 } | |
| 7357 | |
| 7358 DEFUN ("next-single-char-property-change", Fnext_single_char_property_change, | |
| 7359 2, 4, 0, /* | |
| 7360 Return the position of next property change for a specific property. | |
| 7361 Scans characters forward from POS till it finds a change in the PROP | |
| 7362 property, then returns the position of the change. The optional third | |
| 7363 argument OBJECT is the buffer or string to scan (defaults to the current | |
| 7364 buffer). | |
| 7365 The property values are compared with `eq'. | |
| 7366 Return nil if the property is constant all the way to the end of OBJECT. | |
| 7367 If the value is non-nil, it is a position greater than POS, never equal. | |
| 7368 | |
| 7369 If the optional fourth argument LIMIT is non-nil, don't search | |
| 7370 past position LIMIT; return LIMIT if nothing is found before LIMIT. | |
| 7371 If two or more extents with conflicting non-nil values for PROP overlap | |
| 7372 a particular character, it is undefined which value is considered to be | |
| 7373 the value of PROP. (Note that this situation will not happen if you always | |
| 7374 use the text-property primitives.) | |
| 7375 | |
| 7376 This function looks at all extents. To look at only extents created using the | |
| 7377 text-property primitives, use `next-single-char-property-change'. | |
| 428 | 7378 */ |
| 7379 (pos, prop, object, limit)) | |
| 7380 { | |
| 2506 | 7381 return next_previous_single_property_change_fn (pos, prop, object, limit, |
| 7382 1, 0); | |
| 7383 } | |
| 7384 | |
| 7385 DEFUN ("previous-single-char-property-change", | |
| 7386 Fprevious_single_char_property_change, | |
| 7387 2, 4, 0, /* | |
| 7388 Return the position of next property change for a specific property. | |
| 7389 Scans characters backward from POS till it finds a change in the PROP | |
| 7390 property, then returns the position of the change. The optional third | |
| 7391 argument OBJECT is the buffer or string to scan (defaults to the current | |
| 7392 buffer). | |
| 7393 The property values are compared with `eq'. | |
| 7394 Return nil if the property is constant all the way to the start of OBJECT. | |
| 7395 If the value is non-nil, it is a position less than POS, never equal. | |
| 7396 | |
| 7397 If the optional fourth argument LIMIT is non-nil, don't search back | |
| 7398 past position LIMIT; return LIMIT if nothing is found until LIMIT. | |
| 7399 If two or more extents with conflicting non-nil values for PROP overlap | |
| 7400 a particular character, it is undefined which value is considered to be | |
| 7401 the value of PROP. (Note that this situation will not happen if you always | |
| 7402 use the text-property primitives.) | |
| 7403 | |
| 7404 This function looks at all extents. To look at only extents created using the | |
| 7405 text-property primitives, use `next-single-char-property-change'. | |
| 7406 */ | |
| 7407 (pos, prop, object, limit)) | |
| 7408 { | |
| 7409 return next_previous_single_property_change_fn (pos, prop, object, limit, | |
| 7410 0, 0); | |
| 428 | 7411 } |
| 7412 | |
| 7413 #ifdef MEMORY_USAGE_STATS | |
| 7414 | |
| 7415 int | |
| 2286 | 7416 compute_buffer_extent_usage (struct buffer *UNUSED (b), |
| 7417 struct overhead_stats *UNUSED (ovstats)) | |
| 428 | 7418 { |
| 7419 /* #### not yet written */ | |
| 7420 return 0; | |
| 7421 } | |
| 7422 | |
| 7423 #endif /* MEMORY_USAGE_STATS */ | |
| 7424 | |
| 7425 | |
| 7426 /************************************************************************/ | |
| 7427 /* initialization */ | |
| 7428 /************************************************************************/ | |
| 7429 | |
| 7430 void | |
| 7431 syms_of_extents (void) | |
| 7432 { | |
|
5117
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|
7433 INIT_LISP_OBJECT (extent); |
|
3742ea8250b5
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|
7434 INIT_LISP_OBJECT (extent_info); |
|
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|
7435 INIT_LISP_OBJECT (extent_auxiliary); |
| 3092 | 7436 #ifdef NEW_GC |
|
5118
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|
7437 INIT_LISP_OBJECT (gap_array_marker); |
|
e0db3c197671
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Ben Wing <ben@xemacs.org>
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|
7438 INIT_LISP_OBJECT (gap_array); |
|
e0db3c197671
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Ben Wing <ben@xemacs.org>
diff
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|
7439 INIT_LISP_OBJECT (extent_list_marker); |
|
e0db3c197671
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Ben Wing <ben@xemacs.org>
diff
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|
7440 INIT_LISP_OBJECT (extent_list); |
|
e0db3c197671
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|
7441 INIT_LISP_OBJECT (stack_of_extents); |
| 3263 | 7442 #endif /* NEW_GC */ |
| 442 | 7443 |
| 563 | 7444 DEFSYMBOL (Qextentp); |
| 7445 DEFSYMBOL (Qextent_live_p); | |
| 7446 | |
| 7447 DEFSYMBOL (Qall_extents_closed); | |
| 7448 DEFSYMBOL (Qall_extents_open); | |
| 7449 DEFSYMBOL (Qall_extents_closed_open); | |
| 7450 DEFSYMBOL (Qall_extents_open_closed); | |
| 7451 DEFSYMBOL (Qstart_in_region); | |
| 7452 DEFSYMBOL (Qend_in_region); | |
| 7453 DEFSYMBOL (Qstart_and_end_in_region); | |
| 7454 DEFSYMBOL (Qstart_or_end_in_region); | |
| 7455 DEFSYMBOL (Qnegate_in_region); | |
| 7456 | |
| 7457 DEFSYMBOL (Qdetached); | |
| 7458 DEFSYMBOL (Qdestroyed); | |
| 7459 DEFSYMBOL (Qbegin_glyph); | |
| 7460 DEFSYMBOL (Qend_glyph); | |
| 7461 DEFSYMBOL (Qstart_open); | |
| 7462 DEFSYMBOL (Qend_open); | |
| 7463 DEFSYMBOL (Qstart_closed); | |
| 7464 DEFSYMBOL (Qend_closed); | |
| 7465 DEFSYMBOL (Qread_only); | |
| 7466 /* DEFSYMBOL (Qhighlight); in faces.c */ | |
| 7467 DEFSYMBOL (Qunique); | |
| 7468 DEFSYMBOL (Qduplicable); | |
| 7469 DEFSYMBOL (Qdetachable); | |
| 7470 DEFSYMBOL (Qpriority); | |
| 7471 DEFSYMBOL (Qmouse_face); | |
| 7472 DEFSYMBOL (Qinitial_redisplay_function); | |
| 7473 | |
| 7474 | |
| 7475 DEFSYMBOL (Qglyph_layout); /* backwards compatibility */ | |
| 7476 DEFSYMBOL (Qbegin_glyph_layout); | |
| 7477 DEFSYMBOL (Qend_glyph_layout); | |
| 7478 DEFSYMBOL (Qoutside_margin); | |
| 7479 DEFSYMBOL (Qinside_margin); | |
| 7480 DEFSYMBOL (Qwhitespace); | |
| 428 | 7481 /* Qtext defined in general.c */ |
| 7482 | |
| 563 | 7483 DEFSYMBOL (Qpaste_function); |
| 7484 DEFSYMBOL (Qcopy_function); | |
| 7485 | |
| 7486 DEFSYMBOL (Qtext_prop); | |
| 7487 DEFSYMBOL (Qtext_prop_extent_paste_function); | |
| 428 | 7488 |
| 7489 DEFSUBR (Fextentp); | |
| 7490 DEFSUBR (Fextent_live_p); | |
| 7491 DEFSUBR (Fextent_detached_p); | |
| 7492 DEFSUBR (Fextent_start_position); | |
| 7493 DEFSUBR (Fextent_end_position); | |
| 7494 DEFSUBR (Fextent_object); | |
| 7495 DEFSUBR (Fextent_length); | |
| 7496 | |
| 7497 DEFSUBR (Fmake_extent); | |
| 7498 DEFSUBR (Fcopy_extent); | |
| 7499 DEFSUBR (Fdelete_extent); | |
| 7500 DEFSUBR (Fdetach_extent); | |
| 7501 DEFSUBR (Fset_extent_endpoints); | |
| 7502 DEFSUBR (Fnext_extent); | |
| 7503 DEFSUBR (Fprevious_extent); | |
| 1204 | 7504 #ifdef DEBUG_XEMACS |
| 428 | 7505 DEFSUBR (Fnext_e_extent); |
| 7506 DEFSUBR (Fprevious_e_extent); | |
| 7507 #endif | |
| 7508 DEFSUBR (Fnext_extent_change); | |
| 7509 DEFSUBR (Fprevious_extent_change); | |
| 7510 | |
| 7511 DEFSUBR (Fextent_parent); | |
| 7512 DEFSUBR (Fextent_children); | |
| 7513 DEFSUBR (Fset_extent_parent); | |
| 7514 | |
| 7515 DEFSUBR (Fextent_in_region_p); | |
| 7516 DEFSUBR (Fmap_extents); | |
| 7517 DEFSUBR (Fmap_extent_children); | |
| 7518 DEFSUBR (Fextent_at); | |
| 442 | 7519 DEFSUBR (Fextents_at); |
| 428 | 7520 |
| 7521 DEFSUBR (Fset_extent_initial_redisplay_function); | |
| 7522 DEFSUBR (Fextent_face); | |
| 7523 DEFSUBR (Fset_extent_face); | |
| 7524 DEFSUBR (Fextent_mouse_face); | |
| 7525 DEFSUBR (Fset_extent_mouse_face); | |
| 7526 DEFSUBR (Fset_extent_begin_glyph); | |
| 7527 DEFSUBR (Fset_extent_end_glyph); | |
| 7528 DEFSUBR (Fextent_begin_glyph); | |
| 7529 DEFSUBR (Fextent_end_glyph); | |
| 7530 DEFSUBR (Fset_extent_begin_glyph_layout); | |
| 7531 DEFSUBR (Fset_extent_end_glyph_layout); | |
| 7532 DEFSUBR (Fextent_begin_glyph_layout); | |
| 7533 DEFSUBR (Fextent_end_glyph_layout); | |
| 7534 DEFSUBR (Fset_extent_priority); | |
| 7535 DEFSUBR (Fextent_priority); | |
| 7536 DEFSUBR (Fset_extent_property); | |
| 7537 DEFSUBR (Fset_extent_properties); | |
| 7538 DEFSUBR (Fextent_property); | |
| 7539 DEFSUBR (Fextent_properties); | |
| 7540 | |
| 7541 DEFSUBR (Fhighlight_extent); | |
| 7542 DEFSUBR (Fforce_highlight_extent); | |
| 7543 | |
| 7544 DEFSUBR (Finsert_extent); | |
| 7545 | |
| 7546 DEFSUBR (Fget_text_property); | |
| 7547 DEFSUBR (Fget_char_property); | |
| 7548 DEFSUBR (Fput_text_property); | |
| 7549 DEFSUBR (Fput_nonduplicable_text_property); | |
| 7550 DEFSUBR (Fadd_text_properties); | |
| 7551 DEFSUBR (Fadd_nonduplicable_text_properties); | |
| 7552 DEFSUBR (Fremove_text_properties); | |
| 7553 DEFSUBR (Ftext_prop_extent_paste_function); | |
| 7554 DEFSUBR (Fnext_single_property_change); | |
| 7555 DEFSUBR (Fprevious_single_property_change); | |
| 2506 | 7556 DEFSUBR (Fnext_single_char_property_change); |
| 7557 DEFSUBR (Fprevious_single_char_property_change); | |
| 428 | 7558 } |
| 7559 | |
| 7560 void | |
| 7561 vars_of_extents (void) | |
| 7562 { | |
| 7563 DEFVAR_INT ("mouse-highlight-priority", &mouse_highlight_priority /* | |
| 7564 The priority to use for the mouse-highlighting pseudo-extent | |
| 7565 that is used to highlight extents with the `mouse-face' attribute set. | |
| 7566 See `set-extent-priority'. | |
| 7567 */ ); | |
| 7568 /* Set mouse-highlight-priority (which ends up being used both for the | |
| 7569 mouse-highlighting pseudo-extent and the primary selection extent) | |
| 7570 to a very high value because very few extents should override it. | |
| 7571 1000 gives lots of room below it for different-prioritized extents. | |
| 7572 10 doesn't. ediff, for example, likes to use priorities around 100. | |
| 7573 --ben */ | |
| 7574 mouse_highlight_priority = /* 10 */ 1000; | |
| 7575 | |
| 7576 DEFVAR_LISP ("default-text-properties", &Vdefault_text_properties /* | |
| 7577 Property list giving default values for text properties. | |
| 7578 Whenever a character does not specify a value for a property, the value | |
| 7579 stored in this list is used instead. This only applies when the | |
| 7580 functions `get-text-property' or `get-char-property' are called. | |
| 7581 */ ); | |
| 7582 Vdefault_text_properties = Qnil; | |
| 7583 | |
| 7584 staticpro (&Vlast_highlighted_extent); | |
| 7585 Vlast_highlighted_extent = Qnil; | |
| 7586 | |
| 7587 Vextent_face_reusable_list = Fcons (Qnil, Qnil); | |
| 7588 staticpro (&Vextent_face_reusable_list); | |
| 771 | 7589 |
| 428 | 7590 staticpro (&Vextent_face_memoize_hash_table); |
| 7591 /* The memoize hash table maps from lists of symbols to lists of | |
| 7592 faces. It needs to be `equal' to implement the memoization. | |
| 7593 The reverse table maps in the other direction and just needs | |
| 7594 to do `eq' comparison because the lists of faces are already | |
| 7595 memoized. */ | |
| 7596 Vextent_face_memoize_hash_table = | |
| 7597 make_lisp_hash_table (100, HASH_TABLE_VALUE_WEAK, HASH_TABLE_EQUAL); | |
| 7598 staticpro (&Vextent_face_reverse_memoize_hash_table); | |
| 7599 Vextent_face_reverse_memoize_hash_table = | |
| 7600 make_lisp_hash_table (100, HASH_TABLE_KEY_WEAK, HASH_TABLE_EQ); | |
| 1292 | 7601 |
|
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4932
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|
7602 QSin_map_extents_internal = build_defer_string ("(in map-extents-internal)"); |
| 1292 | 7603 staticpro (&QSin_map_extents_internal); |
|
5127
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|
7604 |
|
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
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changeset
|
7605 Vextent_auxiliary_defaults = |
|
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
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|
7606 allocate_extent_auxiliary (); |
|
a9c41067dd88
more cleanups, terminology clarification, lots of doc work
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|
7607 staticpro (&Vextent_auxiliary_defaults); |
|
a9c41067dd88
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|
7608 } |