/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985, 1986, 1993, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 1, or (at your option)
+the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
#include <config.h>
#include "lisp.h"
#include "intervals.h"
#include "buffer.h"
+#include "charset.h"
#include "window.h"
#include "blockinput.h"
-static void insert_1 ();
+#define min(x, y) ((x) < (y) ? (x) : (y))
+
static void insert_from_string_1 ();
static void insert_from_buffer_1 ();
static void gap_left ();
static void adjust_markers ();
static void adjust_point ();
+Lisp_Object Fcombine_after_change_execute ();
+
+/* Non-nil means don't call the after-change-functions right away,
+ just record an element in Vcombine_after_change_calls_list. */
+Lisp_Object Vcombine_after_change_calls;
+
+/* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT)
+ describing changes which happened while combine_after_change_calls
+ was nonzero. We use this to decide how to call them
+ once the deferral ends.
+
+ In each element.
+ BEG-UNCHANGED is the number of chars before the changed range.
+ END-UNCHANGED is the number of chars after the changed range,
+ and CHANGE-AMOUNT is the number of characters inserted by the change
+ (negative for a deletion). */
+Lisp_Object combine_after_change_list;
+
+/* Buffer which combine_after_change_list is about. */
+Lisp_Object combine_after_change_buffer;
+
/* Move gap to position `pos'.
Note that this can quit! */
+void
move_gap (pos)
int pos;
{
if (!newgap)
{
- if (unchanged_modified == MODIFF)
+ if (unchanged_modified == MODIFF
+ && overlay_unchanged_modified == OVERLAY_MODIFF)
{
beg_unchanged = pos;
end_unchanged = Z - pos - 1;
or may be where a quit was detected. */
adjust_markers (pos + 1, GPT, GAP_SIZE);
GPT = pos + 1;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
QUIT;
}
pos--;
- if (unchanged_modified == MODIFF)
+ if (unchanged_modified == MODIFF
+ && overlay_unchanged_modified == OVERLAY_MODIFF)
+
{
beg_unchanged = pos;
end_unchanged = Z - pos - 1;
adjust_markers (GPT + GAP_SIZE, pos + 1 + GAP_SIZE, - GAP_SIZE);
GPT = pos + 1;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
QUIT;
}
-/* Add `amount' to the position of every marker in the current buffer
- whose current position is between `from' (exclusive) and `to' (inclusive).
+/* Add AMOUNT to the position of every marker in the current buffer
+ whose current position is between FROM (exclusive) and TO (inclusive).
+
Also, any markers past the outside of that interval, in the direction
of adjustment, are first moved back to the near end of the interval
- and then adjusted by `amount'. */
+ and then adjusted by AMOUNT.
+
+ When the latter adjustment is done, if AMOUNT is negative,
+ we record the adjustment for undo. (This case happens only for
+ deletion.) */
static void
adjust_markers (from, to, amount)
register struct Lisp_Marker *m;
register int mpos;
- marker = current_buffer->markers;
+ marker = BUF_MARKERS (current_buffer);
while (!NILP (marker))
{
}
else
{
+ /* Here's the case where a marker is inside text being deleted.
+ AMOUNT can be negative for gap motion, too,
+ but then this range contains no markers. */
if (mpos > from + amount && mpos <= from)
- mpos = from + amount;
+ {
+ int before = mpos;
+ int after = from + amount;
+
+ mpos = after;
+
+ /* Compute the before and after positions
+ as buffer positions. */
+ if (before > GPT + GAP_SIZE)
+ before -= GAP_SIZE;
+ else if (before > GPT)
+ before = GPT;
+
+ if (after > GPT + GAP_SIZE)
+ after -= GAP_SIZE;
+ else if (after > GPT)
+ after = GPT;
+
+ record_marker_adjustment (marker, after - before);
+ }
}
if (mpos > from && mpos <= to)
mpos += amount;
}
}
+/* Adjust markers whose insertion-type is t
+ for an insertion of AMOUNT characters at POS. */
+
+static void
+adjust_markers_for_insert (pos, amount)
+ register int pos, amount;
+{
+ Lisp_Object marker;
+ int adjusted = 0;
+
+ marker = BUF_MARKERS (current_buffer);
+
+ while (!NILP (marker))
+ {
+ register struct Lisp_Marker *m = XMARKER (marker);
+ if (m->insertion_type && m->bufpos == pos)
+ {
+ m->bufpos += amount;
+ adjusted = 1;
+ }
+ marker = m->chain;
+ }
+ if (adjusted)
+ /* Adjusting only markers whose insertion-type is t may result in
+ disordered overlays in the slot `overlays_before'. */
+ fix_overlays_before (current_buffer, pos, pos + amount);
+}
+
/* Add the specified amount to point. This is used only when the value
of point changes due to an insert or delete; it does not represent
a conceptual change in point as a marker. In particular, point is
not crossing any interval boundaries, so there's no need to use the
usual SET_PT macro. In fact it would be incorrect to do so, because
- either the old or the new value of point is out of synch with the
+ either the old or the new value of point is out of sync with the
current set of intervals. */
static void
adjust_point (amount)
+ int amount;
{
- current_buffer->text.pt += amount;
+ BUF_PT (current_buffer) += amount;
}
\f
/* Make the gap INCREMENT characters longer. */
+void
make_gap (increment)
int increment;
{
/* If we have to get more space, get enough to last a while. */
increment += 2000;
+ /* Don't allow a buffer size that won't fit in an int
+ even if it will fit in a Lisp integer.
+ That won't work because so many places use `int'. */
+
+ if (Z - BEG + GAP_SIZE + increment
+ >= ((unsigned) 1 << (min (BITS_PER_INT, VALBITS) - 1)))
+ error ("Buffer exceeds maximum size");
+
BLOCK_INPUT;
- result = BUFFER_REALLOC (BEG_ADDR, (Z - BEG + GAP_SIZE + increment));
+ /* We allocate extra 1-byte `\0' at the tail for anchoring a search. */
+ result = BUFFER_REALLOC (BEG_ADDR, (Z - BEG + GAP_SIZE + increment + 1));
if (result == 0)
{
GAP_SIZE += old_gap_size;
GPT = real_gap_loc;
+ /* Put an anchor. */
+ *(Z_ADDR) = 0;
+
Vinhibit_quit = tem;
}
\f
DO NOT use this for the contents of a Lisp string or a Lisp buffer!
prepare_to_modify_buffer could relocate the text. */
+void
insert (string, length)
register unsigned char *string;
register length;
{
if (length > 0)
{
- insert_1 (string, length, 0);
+ insert_1 (string, length, 0, 1);
signal_after_change (PT-length, 0, length);
}
}
+void
insert_and_inherit (string, length)
register unsigned char *string;
register length;
{
if (length > 0)
{
- insert_1 (string, length, 1);
+ insert_1 (string, length, 1, 1);
signal_after_change (PT-length, 0, length);
}
}
-static void
-insert_1 (string, length, inherit)
+void
+insert_1 (string, length, inherit, prepare)
register unsigned char *string;
- register length;
- int inherit;
+ register int length;
+ int inherit, prepare;
{
register Lisp_Object temp;
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, length + Z);
- if (length + Z != XINT (temp))
- error ("maximum buffer size exceeded");
-
- prepare_to_modify_buffer (PT, PT);
+ if (prepare)
+ prepare_to_modify_buffer (PT, PT);
if (PT != GPT)
move_gap (PT);
bcopy (string, GPT_ADDR, length);
#ifdef USE_TEXT_PROPERTIES
- if (current_buffer->intervals != 0)
+ if (BUF_INTERVALS (current_buffer) != 0)
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */
offset_intervals (current_buffer, PT, length);
#endif
GPT += length;
ZV += length;
Z += length;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+ adjust_overlays_for_insert (PT, length);
+ adjust_markers_for_insert (PT, length);
adjust_point (length);
#ifdef USE_TEXT_PROPERTIES
- if (!inherit && current_buffer->intervals != 0)
+ if (!inherit && BUF_INTERVALS (current_buffer) != 0)
Fset_text_properties (make_number (PT - length), make_number (PT),
Qnil, Qnil);
#endif
before we bcopy the stuff into the buffer, and relocate the string
without insert noticing. */
+void
insert_from_string (string, pos, length, inherit)
Lisp_Object string;
register int pos, length;
GPT += length;
ZV += length;
Z += length;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+ adjust_overlays_for_insert (PT, length);
+ adjust_markers_for_insert (PT, length);
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
graft_intervals_into_buffer (XSTRING (string)->intervals, PT, length,
if (pos < BUF_GPT (buf))
{
- chunk = min (length, BUF_GPT (buf) - pos);
+ chunk = BUF_GPT (buf) - pos;
+ if (chunk > length)
+ chunk = length;
bcopy (BUF_CHAR_ADDRESS (buf, pos), GPT_ADDR, chunk);
}
else
GPT_ADDR + chunk, length - chunk);
#ifdef USE_TEXT_PROPERTIES
- if (current_buffer->intervals != 0)
+ if (BUF_INTERVALS (current_buffer) != 0)
offset_intervals (current_buffer, PT, length);
#endif
GPT += length;
ZV += length;
Z += length;
+ if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */
+ adjust_overlays_for_insert (PT, length);
+ adjust_markers_for_insert (PT, length);
adjust_point (length);
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- graft_intervals_into_buffer (copy_intervals (buf->intervals, pos, length),
+ graft_intervals_into_buffer (copy_intervals (BUF_INTERVALS (buf),
+ pos, length),
PT - length, length, current_buffer, inherit);
}
void
insert_char (c)
- unsigned char c;
+ int c;
{
- insert (&c, 1);
+ unsigned char workbuf[4], *str;
+ int len = CHAR_STRING (c, workbuf, str);
+
+ insert (str, len);
}
/* Insert the null-terminated string S before point */
Don't use this function to insert part of a Lisp string,
since gc could happen and relocate it. */
+void
insert_before_markers (string, length)
unsigned char *string;
register int length;
if (length > 0)
{
register int opoint = PT;
- insert_1 (string, length, 0);
+ insert_1 (string, length, 0, 1);
adjust_markers (opoint - 1, opoint, length);
signal_after_change (PT-length, 0, length);
}
}
+void
insert_before_markers_and_inherit (string, length)
unsigned char *string;
register int length;
if (length > 0)
{
register int opoint = PT;
- insert_1 (string, length, 1);
+ insert_1 (string, length, 1, 1);
adjust_markers (opoint - 1, opoint, length);
signal_after_change (PT-length, 0, length);
}
/* Insert part of a Lisp string, relocating markers after. */
+void
insert_from_string_before_markers (string, pos, length, inherit)
Lisp_Object string;
register int pos, length;
/* Delete characters in current buffer
from FROM up to (but not including) TO. */
+void
del_range (from, to)
register int from, to;
{
- return del_range_1 (from, to, 1);
+ del_range_1 (from, to, 1);
}
/* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. */
+void
del_range_1 (from, to, prepare)
register int from, to, prepare;
{
if (prepare)
prepare_to_modify_buffer (from, to);
+ /* Relocate all markers pointing into the new, larger gap
+ to point at the end of the text before the gap.
+ This has to be done before recording the deletion,
+ so undo handles this after reinserting the text. */
+ adjust_markers (to + GAP_SIZE, to + GAP_SIZE, - numdel - GAP_SIZE);
+
record_delete (from, numdel);
MODIFF++;
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
offset_intervals (current_buffer, from, - numdel);
- /* Relocate all markers pointing into the new, larger gap
- to point at the end of the text before the gap. */
- adjust_markers (to + GAP_SIZE, to + GAP_SIZE, - numdel - GAP_SIZE);
+ /* Adjust the overlay center as needed. This must be done after
+ adjusting the markers that bound the overlays. */
+ adjust_overlays_for_delete (from, numdel);
GAP_SIZE += numdel;
ZV -= numdel;
Z -= numdel;
GPT = from;
+ *(GPT_ADDR) = 0; /* Put an anchor. */
if (GPT - BEG < beg_unchanged)
beg_unchanged = GPT - BEG;
to END. This checks the read-only properties of the region, calls
the necessary modification hooks, and warns the next redisplay that
it should pay attention to that area. */
+void
modify_region (buffer, start, end)
struct buffer *buffer;
int start, end;
prepare_to_modify_buffer (start, end);
- if (start - 1 < beg_unchanged || unchanged_modified == MODIFF)
+ if (start - 1 < beg_unchanged
+ || (unchanged_modified == MODIFF
+ && overlay_unchanged_modified == OVERLAY_MODIFF))
beg_unchanged = start - 1;
if (Z - end < end_unchanged
- || unchanged_modified == MODIFF)
+ || (unchanged_modified == MODIFF
+ && overlay_unchanged_modified == OVERLAY_MODIFF))
end_unchanged = Z - end;
- if (MODIFF <= current_buffer->save_modified)
+ if (MODIFF <= SAVE_MODIFF)
record_first_change ();
MODIFF++;
+ buffer->point_before_scroll = Qnil;
+
if (buffer != old_buffer)
set_buffer_internal (old_buffer);
}
verify that the text to be modified is not read-only, and call
any modification properties the text may have. */
+void
prepare_to_modify_buffer (start, end)
- Lisp_Object start, end;
+ int start, end;
{
if (!NILP (current_buffer->read_only))
Fbarf_if_buffer_read_only ();
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
- if (current_buffer->intervals != 0)
+ if (BUF_INTERVALS (current_buffer) != 0)
verify_interval_modification (current_buffer, start, end);
- if (!NILP (current_buffer->overlays_before)
- || !NILP (current_buffer->overlays_after))
- verify_overlay_modification (start, end);
-
#ifdef CLASH_DETECTION
- if (!NILP (current_buffer->filename)
- && current_buffer->save_modified >= MODIFF)
- lock_file (current_buffer->filename);
+ if (!NILP (current_buffer->file_truename)
+ /* Make binding buffer-file-name to nil effective. */
+ && !NILP (current_buffer->filename)
+ && SAVE_MODIFF >= MODIFF)
+ lock_file (current_buffer->file_truename);
#else
/* At least warn if this file has changed on disk since it was visited. */
if (!NILP (current_buffer->filename)
- && current_buffer->save_modified >= MODIFF
+ && SAVE_MODIFF >= MODIFF
&& NILP (Fverify_visited_file_modtime (Fcurrent_buffer ()))
&& !NILP (Ffile_exists_p (current_buffer->filename)))
call1 (intern ("ask-user-about-supersession-threat"),
Vdeactivate_mark = Qt;
}
\f
-static Lisp_Object
-before_change_function_restore (value)
- Lisp_Object value;
-{
- Vbefore_change_function = value;
-}
-
-static Lisp_Object
-after_change_function_restore (value)
- Lisp_Object value;
-{
- Vafter_change_function = value;
-}
-
-static Lisp_Object
-before_change_functions_restore (value)
- Lisp_Object value;
-{
- Vbefore_change_functions = value;
-}
+/* Signal a change to the buffer immediately before it happens.
+ START_INT and END_INT are the bounds of the text to be changed. */
-static Lisp_Object
-after_change_functions_restore (value)
- Lisp_Object value;
+void
+signal_before_change (start_int, end_int)
+ int start_int, end_int;
{
- Vafter_change_functions = value;
-}
+ Lisp_Object start, end;
-/* Signal a change to the buffer immediately before it happens.
- START and END are the bounds of the text to be changed,
- as Lisp objects. */
+ start = make_number (start_int);
+ end = make_number (end_int);
-signal_before_change (start, end)
- Lisp_Object start, end;
-{
/* If buffer is unmodified, run a special hook for that case. */
- if (current_buffer->save_modified >= MODIFF
+ if (SAVE_MODIFF >= MODIFF
&& !NILP (Vfirst_change_hook)
&& !NILP (Vrun_hooks))
call1 (Vrun_hooks, Qfirst_change_hook);
- /* Now in any case run the before-change-function if any. */
+ /* Run the before-change-function if any.
+ We don't bother "binding" this variable to nil
+ because it is obsolete anyway and new code should not use it. */
if (!NILP (Vbefore_change_function))
- {
- int count = specpdl_ptr - specpdl;
- Lisp_Object function;
-
- function = Vbefore_change_function;
-
- record_unwind_protect (after_change_function_restore,
- Vafter_change_function);
- record_unwind_protect (before_change_function_restore,
- Vbefore_change_function);
- record_unwind_protect (after_change_functions_restore,
- Vafter_change_functions);
- record_unwind_protect (before_change_functions_restore,
- Vbefore_change_functions);
- Vafter_change_function = Qnil;
- Vbefore_change_function = Qnil;
- Vafter_change_functions = Qnil;
- Vbefore_change_functions = Qnil;
+ call2 (Vbefore_change_function, start, end);
- call2 (function, start, end);
- unbind_to (count, Qnil);
- }
-
- /* Now in any case run the before-change-function if any. */
+ /* Now run the before-change-functions if any. */
if (!NILP (Vbefore_change_functions))
{
- int count = specpdl_ptr - specpdl;
- Lisp_Object functions;
-
- functions = Vbefore_change_functions;
-
- record_unwind_protect (after_change_function_restore,
- Vafter_change_function);
- record_unwind_protect (before_change_function_restore,
- Vbefore_change_function);
- record_unwind_protect (after_change_functions_restore,
- Vafter_change_functions);
- record_unwind_protect (before_change_functions_restore,
- Vbefore_change_functions);
- Vafter_change_function = Qnil;
- Vbefore_change_function = Qnil;
- Vafter_change_functions = Qnil;
+ Lisp_Object args[3];
+ Lisp_Object before_change_functions;
+ Lisp_Object after_change_functions;
+ struct gcpro gcpro1, gcpro2;
+
+ /* "Bind" before-change-functions and after-change-functions
+ to nil--but in a way that errors don't know about.
+ That way, if there's an error in them, they will stay nil. */
+ before_change_functions = Vbefore_change_functions;
+ after_change_functions = Vafter_change_functions;
Vbefore_change_functions = Qnil;
-
- while (CONSP (functions))
- {
- call2 (XCONS (functions)->car, start, end);
- functions = XCONS (functions)->cdr;
- }
- unbind_to (count, Qnil);
+ Vafter_change_functions = Qnil;
+ GCPRO2 (before_change_functions, after_change_functions);
+
+ /* Actually run the hook functions. */
+ args[0] = Qbefore_change_functions;
+ args[1] = start;
+ args[2] = end;
+ run_hook_list_with_args (before_change_functions, 3, args);
+
+ /* "Unbind" the variables we "bound" to nil. */
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ UNGCPRO;
}
+
+ if (!NILP (current_buffer->overlays_before)
+ || !NILP (current_buffer->overlays_after))
+ report_overlay_modification (start, end, 0, start, end, Qnil);
}
/* Signal a change immediately after it happens.
POS is the address of the start of the changed text.
LENDEL is the number of characters of the text before the change.
(Not the whole buffer; just the part that was changed.)
- LENINS is the number of characters in the changed text. */
+ LENINS is the number of characters in that part of the text
+ after the change. */
+void
signal_after_change (pos, lendel, lenins)
int pos, lendel, lenins;
{
- if (!NILP (Vafter_change_function))
+ /* If we are deferring calls to the after-change functions
+ and there are no before-change functions,
+ just record the args that we were going to use. */
+ if (! NILP (Vcombine_after_change_calls)
+ && NILP (Vbefore_change_function) && NILP (Vbefore_change_functions)
+ && NILP (current_buffer->overlays_before)
+ && NILP (current_buffer->overlays_after))
{
- int count = specpdl_ptr - specpdl;
- Lisp_Object function;
- function = Vafter_change_function;
-
- record_unwind_protect (after_change_function_restore,
- Vafter_change_function);
- record_unwind_protect (before_change_function_restore,
- Vbefore_change_function);
- record_unwind_protect (after_change_functions_restore,
- Vafter_change_functions);
- record_unwind_protect (before_change_functions_restore,
- Vbefore_change_functions);
- Vafter_change_function = Qnil;
- Vbefore_change_function = Qnil;
- Vafter_change_functions = Qnil;
- Vbefore_change_functions = Qnil;
+ Lisp_Object elt;
+
+ if (!NILP (combine_after_change_list)
+ && current_buffer != XBUFFER (combine_after_change_buffer))
+ Fcombine_after_change_execute ();
- call3 (function, make_number (pos), make_number (pos + lenins),
- make_number (lendel));
- unbind_to (count, Qnil);
+ elt = Fcons (make_number (pos - BEG),
+ Fcons (make_number (Z - (pos - lendel + lenins)),
+ Fcons (make_number (lenins - lendel), Qnil)));
+ combine_after_change_list
+ = Fcons (elt, combine_after_change_list);
+ combine_after_change_buffer = Fcurrent_buffer ();
+
+ return;
}
+
+ if (!NILP (combine_after_change_list))
+ Fcombine_after_change_execute ();
+
+ /* Run the after-change-function if any.
+ We don't bother "binding" this variable to nil
+ because it is obsolete anyway and new code should not use it. */
+ if (!NILP (Vafter_change_function))
+ call3 (Vafter_change_function,
+ make_number (pos), make_number (pos + lenins),
+ make_number (lendel));
+
if (!NILP (Vafter_change_functions))
{
- int count = specpdl_ptr - specpdl;
- Lisp_Object functions;
- functions = Vafter_change_functions;
-
- record_unwind_protect (after_change_function_restore,
- Vafter_change_function);
- record_unwind_protect (before_change_function_restore,
- Vbefore_change_function);
- record_unwind_protect (after_change_functions_restore,
- Vafter_change_functions);
- record_unwind_protect (before_change_functions_restore,
- Vbefore_change_functions);
- Vafter_change_function = Qnil;
- Vbefore_change_function = Qnil;
- Vafter_change_functions = Qnil;
+ Lisp_Object args[4];
+ Lisp_Object before_change_functions;
+ Lisp_Object after_change_functions;
+ struct gcpro gcpro1, gcpro2;
+
+ /* "Bind" before-change-functions and after-change-functions
+ to nil--but in a way that errors don't know about.
+ That way, if there's an error in them, they will stay nil. */
+ before_change_functions = Vbefore_change_functions;
+ after_change_functions = Vafter_change_functions;
Vbefore_change_functions = Qnil;
+ Vafter_change_functions = Qnil;
+ GCPRO2 (before_change_functions, after_change_functions);
+
+ /* Actually run the hook functions. */
+ args[0] = Qafter_change_functions;
+ XSETFASTINT (args[1], pos);
+ XSETFASTINT (args[2], pos + lenins);
+ XSETFASTINT (args[3], lendel);
+ run_hook_list_with_args (after_change_functions,
+ 4, args);
+
+ /* "Unbind" the variables we "bound" to nil. */
+ Vbefore_change_functions = before_change_functions;
+ Vafter_change_functions = after_change_functions;
+ UNGCPRO;
+ }
- while (CONSP (functions))
- {
- call3 (XCONS (functions)->car,
- make_number (pos), make_number (pos + lenins),
- make_number (lendel));
- functions = XCONS (functions)->cdr;
- }
- unbind_to (count, Qnil);
+ if (!NILP (current_buffer->overlays_before)
+ || !NILP (current_buffer->overlays_after))
+ report_overlay_modification (make_number (pos),
+ make_number (pos + lenins),
+ 1,
+ make_number (pos), make_number (pos + lenins),
+ make_number (lendel));
+
+ /* After an insertion, call the text properties
+ insert-behind-hooks or insert-in-front-hooks. */
+ if (lendel == 0)
+ report_interval_modification (pos, pos + lenins);
+}
+
+Lisp_Object
+Fcombine_after_change_execute_1 (val)
+ Lisp_Object val;
+{
+ Vcombine_after_change_calls = val;
+ return val;
+}
+
+DEFUN ("combine-after-change-execute", Fcombine_after_change_execute,
+ Scombine_after_change_execute, 0, 0, 0,
+ "This function is for use internally in `combine-after-change-calls'.")
+ ()
+{
+ register Lisp_Object val;
+ int count = specpdl_ptr - specpdl;
+ int beg, end, change;
+ int begpos, endpos;
+ Lisp_Object tail;
+
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+
+ Fset_buffer (combine_after_change_buffer);
+
+ /* # chars unchanged at beginning of buffer. */
+ beg = Z - BEG;
+ /* # chars unchanged at end of buffer. */
+ end = beg;
+ /* Total amount of insertion (negative for deletion). */
+ change = 0;
+
+ /* Scan the various individual changes,
+ accumulating the range info in BEG, END and CHANGE. */
+ for (tail = combine_after_change_list; CONSP (tail);
+ tail = XCONS (tail)->cdr)
+ {
+ Lisp_Object elt;
+ int thisbeg, thisend, thischange;
+
+ /* Extract the info from the next element. */
+ elt = XCONS (tail)->car;
+ if (! CONSP (elt))
+ continue;
+ thisbeg = XINT (XCONS (elt)->car);
+
+ elt = XCONS (elt)->cdr;
+ if (! CONSP (elt))
+ continue;
+ thisend = XINT (XCONS (elt)->car);
+
+ elt = XCONS (elt)->cdr;
+ if (! CONSP (elt))
+ continue;
+ thischange = XINT (XCONS (elt)->car);
+
+ /* Merge this range into the accumulated range. */
+ change += thischange;
+ if (thisbeg < beg)
+ beg = thisbeg;
+ if (thisend < end)
+ end = thisend;
}
+
+ /* Get the current start and end positions of the range
+ that was changed. */
+ begpos = BEG + beg;
+ endpos = Z - end;
+
+ /* We are about to handle these, so discard them. */
+ combine_after_change_list = Qnil;
+
+ /* Now run the after-change functions for real.
+ Turn off the flag that defers them. */
+ record_unwind_protect (Fcombine_after_change_execute_1,
+ Vcombine_after_change_calls);
+ signal_after_change (begpos, endpos - begpos - change, endpos - begpos);
+
+ return unbind_to (count, val);
+}
+\f
+syms_of_insdel ()
+{
+ staticpro (&combine_after_change_list);
+ combine_after_change_list = Qnil;
+
+ DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls,
+ "Used internally by the `combine-after-change-calls' macro.");
+ Vcombine_after_change_calls = Qnil;
+
+ defsubr (&Scombine_after_change_execute);
}