/* Buffer manipulation primitives for GNU Emacs.
- Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995
+ Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997
Free Software Foundation, Inc.
This file is part of GNU Emacs.
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 <sys/types.h>
#include "window.h"
#include "commands.h"
#include "buffer.h"
+#include "charset.h"
#include "region-cache.h"
#include "indent.h"
#include "blockinput.h"
+#include "frame.h"
struct buffer *current_buffer; /* the current buffer */
buffer_slot_type_mismatch will signal an error. */
struct buffer buffer_local_types;
+/* Flags indicating which built-in buffer-local variables
+ are permanent locals. */
+static int buffer_permanent_local_flags;
+
Lisp_Object Fset_buffer ();
void set_buffer_internal ();
void set_buffer_internal_1 ();
static void call_overlay_mod_hooks ();
static void swap_out_buffer_local_variables ();
+static void reset_buffer_local_variables ();
/* Alist of all buffer names vs the buffers. */
/* This used to be a variable, but is no longer,
error ("Invalid buffer argument");
}
\f
-DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0,
- "Return a list of all existing live buffers.")
- ()
+DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0,
+ "Return non-nil if OBJECT is a buffer which has not been killed.\n\
+Value is nil if OBJECT is not a buffer or if it has been killed.")
+ (object)
+ Lisp_Object object;
{
- return Fmapcar (Qcdr, Vbuffer_alist);
+ return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name))
+ ? Qt : Qnil);
+}
+
+DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0,
+ "Return a list of all existing live buffers.\n\
+If the optional arg FRAME is a frame, we return that frame's buffer list.")
+ (frame)
+ Lisp_Object frame;
+{
+ Lisp_Object framelist, general;
+ general = Fmapcar (Qcdr, Vbuffer_alist);
+
+ if (FRAMEP (frame))
+ {
+ Lisp_Object tail;
+
+ CHECK_FRAME (frame, 1);
+
+ framelist = Fcopy_sequence (XFRAME (frame)->buffer_list);
+
+ /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
+ tail = framelist;
+ while (! NILP (tail))
+ {
+ general = Fdelq (XCONS (tail)->car, general);
+ tail = XCONS (tail)->cdr;
+ }
+ return nconc2 (framelist, general);
+ }
+
+ return general;
}
/* Like Fassoc, but use Fstring_equal to compare
BUF_GAP_SIZE (b) = 20;
BLOCK_INPUT;
- BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b));
+ /* We allocate extra 1-byte at the tail and keep it always '\0' for
+ anchoring a search. */
+ BUFFER_ALLOC (BUF_BEG_ADDR (b), (BUF_GAP_SIZE (b) + 1));
UNBLOCK_INPUT;
if (! BUF_BEG_ADDR (b))
buffer_memory_full ();
BUF_ZV (b) = 1;
BUF_Z (b) = 1;
BUF_MODIFF (b) = 1;
+ BUF_OVERLAY_MODIFF (b) = 1;
BUF_SAVE_MODIFF (b) = 1;
BUF_INTERVALS (b) = 0;
+ *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */
b->newline_cache = 0;
b->width_run_cache = 0;
b->undo_list = Qt;
reset_buffer (b);
- reset_buffer_local_variables (b);
+ reset_buffer_local_variables (b, 1);
/* Put this in the alist of all live buffers. */
XSETBUFFER (buf, b);
return buf;
}
-DEFUN ("make-indirect-buffer",
- Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2,
+DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2,
"bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
- "Create and return an indirect buffer for buffer BASE, named NAME.\n\
-BASE should be an existing buffer (or buffer name).\n\
+ "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
+BASE-BUFFER should be an existing buffer (or buffer name).\n\
NAME should be a string which is not the name of an existing buffer.")
(base_buffer, name)
register Lisp_Object base_buffer, name;
b->name = name;
reset_buffer (b);
- reset_buffer_local_variables (b);
+ reset_buffer_local_variables (b, 1);
/* Put this in the alist of all live buffers. */
XSETBUFFER (buf, b);
b->modtime = 0;
XSETFASTINT (b->save_length, 0);
b->last_window_start = 1;
+ /* It is more conservative to start out "changed" than "unchanged". */
+ b->clip_changed = 1;
b->backed_up = Qnil;
b->auto_save_modified = 0;
b->auto_save_failure_time = -1;
b->mark_active = Qnil;
b->point_before_scroll = Qnil;
b->file_format = Qnil;
+ b->last_selected_window = Qnil;
+ XSETINT (b->display_count, 0);
+ b->extra2 = Qnil;
+ b->extra3 = Qnil;
}
/* Reset buffer B's local variables info.
Don't use this on a buffer that has already been in use;
it does not treat permanent locals consistently.
- Instead, use Fkill_all_local_variables. */
+ Instead, use Fkill_all_local_variables.
-reset_buffer_local_variables (b)
+ If PERMANENT_TOO is 1, then we reset permanent built-in
+ buffer-local variables. If PERMANENT_TOO is 0,
+ we preserve those. */
+
+static void
+reset_buffer_local_variables (b, permanent_too)
register struct buffer *b;
+ int permanent_too;
{
register int offset;
+ int dont_reset;
+
+ /* Decide which built-in local variables to reset. */
+ if (permanent_too)
+ dont_reset = 0;
+ else
+ dont_reset = buffer_permanent_local_flags;
/* Reset the major mode to Fundamental, together with all the
things that depend on the major mode.
b->abbrev_table = Vfundamental_mode_abbrev_table;
b->mode_name = QSFundamental;
b->minor_modes = Qnil;
+
+ /* If the standard case table has been altered and invalidated,
+ fix up its insides first. */
+ if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0])
+ && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1])
+ && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2])))
+ Fset_standard_case_table (Vascii_downcase_table);
+
b->downcase_table = Vascii_downcase_table;
b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0];
b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1];
b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2];
- b->buffer_file_type = Qnil;
b->invisibility_spec = Qt;
+#ifndef DOS_NT
+ b->buffer_file_type = Qnil;
+#endif
#if 0
b->sort_table = XSTRING (Vascii_sort_table);
b->folding_sort_table = XSTRING (Vascii_folding_sort_table);
#endif /* 0 */
- /* Reset all per-buffer variables to their defaults. */
+ /* Reset all (or most) per-buffer variables to their defaults. */
b->local_var_alist = Qnil;
- b->local_var_flags = 0;
+ b->local_var_flags &= dont_reset;
/* For each slot that has a default value,
copy that into the slot. */
offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */
{
int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags));
- if (flag > 0 || flag == -2)
- *(Lisp_Object *)(offset + (char *)b) =
- *(Lisp_Object *)(offset + (char *)&buffer_defaults);
+ if ((flag > 0
+ /* Don't reset a permanent local. */
+ && ! (dont_reset & flag))
+ || flag == -2)
+ *(Lisp_Object *)(offset + (char *)b)
+ = *(Lisp_Object *)(offset + (char *)&buffer_defaults);
}
}
(buffer, visible_ok)
register Lisp_Object buffer, visible_ok;
{
- register Lisp_Object tail, buf, notsogood, tem;
+ Lisp_Object Fset_buffer_major_mode ();
+ register Lisp_Object tail, buf, notsogood, tem, pred, add_ons;
notsogood = Qnil;
- for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail))
+ tail = Vbuffer_alist;
+ pred = frame_buffer_predicate ();
+
+ /* Consider buffers that have been seen in the selected frame
+ before other buffers. */
+
+ tem = frame_buffer_list ();
+ add_ons = Qnil;
+ while (CONSP (tem))
+ {
+ if (BUFFERP (XCONS (tem)->car))
+ add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons);
+ tem = XCONS (tem)->cdr;
+ }
+ tail = nconc2 (Fnreverse (add_ons), tail);
+
+ for (; !NILP (tail); tail = Fcdr (tail))
{
buf = Fcdr (Fcar (tail));
if (EQ (buf, buffer))
continue;
if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ')
continue;
-#ifdef MULTI_FRAME
/* If the selected frame has a buffer_predicate,
disregard buffers that don't fit the predicate. */
- tem = frame_buffer_predicate ();
- if (!NILP (tem))
+ if (!NILP (pred))
{
- tem = call1 (tem, buf);
+ tem = call1 (pred, buf);
if (NILP (tem))
continue;
}
-#endif
if (NILP (visible_ok))
tem = Fget_buffer_window (buf, Qt);
}
if (!NILP (notsogood))
return notsogood;
- return Fget_buffer_create (build_string ("*scratch*"));
+ buf = Fget_buffer_create (build_string ("*scratch*"));
+ Fset_buffer_major_mode (buf);
+ return buf;
}
\f
DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo,
before the buffer is actually killed. The buffer to be killed is current\n\
when the hook functions are called.\n\n\
Any processes that have this buffer as the `process-buffer' are killed\n\
-with `delete-process'.")
- (bufname)
- Lisp_Object bufname;
+with SIGHUP.")
+ (buffer)
+ Lisp_Object buffer;
{
Lisp_Object buf;
register struct buffer *b;
register struct Lisp_Marker *m;
struct gcpro gcpro1, gcpro2;
- if (NILP (bufname))
+ if (NILP (buffer))
buf = Fcurrent_buffer ();
else
- buf = Fget_buffer (bufname);
+ buf = Fget_buffer (buffer);
if (NILP (buf))
- nsberror (bufname);
+ nsberror (buffer);
b = XBUFFER (buf);
if (INTERACTIVE && !NILP (b->filename)
&& BUF_MODIFF (b) > BUF_SAVE_MODIFF (b))
{
- GCPRO2 (buf, bufname);
+ GCPRO1 (buf);
tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
XSTRING (b->name)->data));
UNGCPRO;
tem = Vinhibit_quit;
Vinhibit_quit = Qt;
+ replace_buffer_in_all_windows (buf);
Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist);
- Freplace_buffer_in_windows (buf);
+ frames_discard_buffer (buf);
Vinhibit_quit = tem;
/* Delete any auto-save file, if we saved it in this session. */
if they happened to remain encached in their symbols.
This gets rid of them for certain. */
swap_out_buffer_local_variables (b);
- reset_buffer_local_variables (b);
+ reset_buffer_local_variables (b, 1);
b->name = Qnil;
else
XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr;
- XCONS(link)->cdr = Vbuffer_alist;
+ XCONS (link)->cdr = Vbuffer_alist;
Vbuffer_alist = link;
+
+ /* Now move this buffer to the front of frame_buffer_list also. */
+
+ prev = Qnil;
+ for (link = frame_buffer_list (); CONSP (link); link = XCONS (link)->cdr)
+ {
+ if (EQ (XCONS (link)->car, buf))
+ break;
+ prev = link;
+ }
+
+ /* Effectively do delq. */
+
+ if (CONSP (link))
+ {
+ if (NILP (prev))
+ set_frame_buffer_list (XCONS (frame_buffer_list ())->cdr);
+ else
+ XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr;
+
+ XCONS (link)->cdr = frame_buffer_list ();
+ set_frame_buffer_list (link);
+ }
+ else
+ set_frame_buffer_list (Fcons (buf, frame_buffer_list ()));
}
DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0,
"Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
Use this function before selecting the buffer, since it may need to inspect\n\
the current buffer's major mode.")
- (buf)
- Lisp_Object buf;
+ (buffer)
+ Lisp_Object buffer;
{
int count;
Lisp_Object function;
record_unwind_protect (save_excursion_restore, save_excursion_save ());
- Fset_buffer (buf);
+ Fset_buffer (buffer);
call0 (function);
return unbind_to (count, Qnil);
WARNING: This is NOT the way to work on another buffer temporarily\n\
within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
the window-buffer correspondences.")
- (bufname, norecord)
- Lisp_Object bufname, norecord;
+ (buffer, norecord)
+ Lisp_Object buffer, norecord;
{
register Lisp_Object buf;
Lisp_Object tem;
if (!NILP (tem))
error ("Cannot switch buffers in a dedicated window");
- if (NILP (bufname))
+ if (NILP (buffer))
buf = Fother_buffer (Fcurrent_buffer (), Qnil);
else
{
- buf = Fget_buffer (bufname);
+ buf = Fget_buffer (buffer);
if (NILP (buf))
{
- buf = Fget_buffer_create (bufname);
+ buf = Fget_buffer_create (buffer);
Fset_buffer_major_mode (buf);
}
}
return buf;
}
-DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0,
+DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0,
"Select buffer BUFFER in some window, preferably a different one.\n\
If BUFFER is nil, then some other buffer is chosen.\n\
If `pop-up-windows' is non-nil, windows can be split to do this.\n\
If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
-window even if BUFFER is already visible in the selected window.")
- (bufname, other)
- Lisp_Object bufname, other;
+window even if BUFFER is already visible in the selected window.\n\
+This uses the function `display-buffer' as a subroutine; see the documentation\n\
+of `display-buffer' for additional customization information.\n\
+\n\
+Optional third arg NORECORD non-nil means\n\
+do not put this buffer at the front of the list of recently selected ones.")
+ (buffer, other_window, norecord)
+ Lisp_Object buffer, other_window, norecord;
{
register Lisp_Object buf;
- if (NILP (bufname))
+ if (NILP (buffer))
buf = Fother_buffer (Fcurrent_buffer (), Qnil);
else
{
- buf = Fget_buffer (bufname);
+ buf = Fget_buffer (buffer);
if (NILP (buf))
{
- buf = Fget_buffer_create (bufname);
+ buf = Fget_buffer_create (buffer);
Fset_buffer_major_mode (buf);
}
}
Fset_buffer (buf);
- record_buffer (buf);
- Fselect_window (Fdisplay_buffer (buf, other));
+ if (NILP (norecord))
+ record_buffer (buf);
+ Fselect_window (Fdisplay_buffer (buf, other_window));
return buf;
}
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf);
+ Fset_marker (old_buf->pt_marker, make_number (BUF_PT (old_buf)),
+ obuf);
}
if (! NILP (old_buf->begv_marker))
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf);
+ Fset_marker (old_buf->begv_marker, make_number (BUF_BEGV (old_buf)),
+ obuf);
}
if (! NILP (old_buf->zv_marker))
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf);
+ Fset_marker (old_buf->zv_marker, make_number (BUF_ZV (old_buf)),
+ obuf);
}
}
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->pt_marker, BUF_PT (old_buf), obuf);
+ Fset_marker (old_buf->pt_marker, make_number (BUF_PT (old_buf)),
+ obuf);
}
if (! NILP (old_buf->begv_marker))
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->begv_marker, BUF_BEGV (old_buf), obuf);
+ Fset_marker (old_buf->begv_marker, make_number (BUF_BEGV (old_buf)),
+ obuf);
}
if (! NILP (old_buf->zv_marker))
{
Lisp_Object obuf;
XSETBUFFER (obuf, old_buf);
- Fset_marker (old_buf->zv_marker, BUF_ZV (old_buf), obuf);
+ Fset_marker (old_buf->zv_marker, make_number (BUF_ZV (old_buf)),
+ obuf);
}
}
This function does not display the buffer, so its effect ends\n\
when the current command terminates.\n\
Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
- (bufname)
- register Lisp_Object bufname;
+ (buffer)
+ register Lisp_Object buffer;
{
- register Lisp_Object buffer;
- buffer = Fget_buffer (bufname);
- if (NILP (buffer))
- nsberror (bufname);
- if (NILP (XBUFFER (buffer)->name))
+ register Lisp_Object buf;
+ buf = Fget_buffer (buffer);
+ if (NILP (buf))
+ nsberror (buffer);
+ if (NILP (XBUFFER (buf)->name))
error ("Selecting deleted buffer");
- set_buffer_internal (XBUFFER (buffer));
- return buffer;
+ set_buffer_internal (XBUFFER (buf));
+ return buf;
}
\f
DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only,
If BUFFER is nil or omitted, bury the current buffer.\n\
Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
selected window if it is displayed there.")
- (buf)
- register Lisp_Object buf;
+ (buffer)
+ register Lisp_Object buffer;
{
/* Figure out what buffer we're going to bury. */
- if (NILP (buf))
+ if (NILP (buffer))
{
- XSETBUFFER (buf, current_buffer);
+ XSETBUFFER (buffer, current_buffer);
/* If we're burying the current buffer, unshow it. */
- Fswitch_to_buffer (Fother_buffer (buf, Qnil), Qnil);
+ Fswitch_to_buffer (Fother_buffer (buffer, Qnil), Qnil);
}
else
{
Lisp_Object buf1;
- buf1 = Fget_buffer (buf);
+ buf1 = Fget_buffer (buffer);
if (NILP (buf1))
- nsberror (buf);
- buf = buf1;
+ nsberror (buffer);
+ buffer = buf1;
}
- /* Move buf to the end of the buffer list. */
+ /* Move buffer to the end of the buffer list. */
{
register Lisp_Object aelt, link;
- aelt = Frassq (buf, Vbuffer_alist);
+ aelt = Frassq (buffer, Vbuffer_alist);
link = Fmemq (aelt, Vbuffer_alist);
Vbuffer_alist = Fdelq (aelt, Vbuffer_alist);
XCONS (link)->cdr = Qnil;
Vbuffer_alist = nconc2 (Vbuffer_alist, link);
}
+ frames_bury_buffer (buffer);
+
return Qnil;
}
\f
/* Actually eliminate all local bindings of this buffer. */
- reset_buffer_local_variables (current_buffer);
+ reset_buffer_local_variables (current_buffer, 0);
/* Redisplay mode lines; we are changing major mode. */
it's more efficient to hold onto the memory instead of repeatedly
allocating and freeing it. */
static struct sortstrlist overlay_heads, overlay_tails;
-static char *overlay_str_buf;
+static unsigned char *overlay_str_buf;
/* Allocated length of overlay_str_buf. */
static int overlay_str_len;
Returns the string length, and stores the contents indirectly through
PSTR, if that variable is non-null. The string may be overwritten by
subsequent calls. */
+
int
overlay_strings (pos, w, pstr)
int pos;
struct window *w;
- char **pstr;
+ unsigned char **pstr;
{
Lisp_Object ov, overlay, window, str;
int startpos, endpos;
{
Lisp_Object tem;
int i;
- char *p;
+ unsigned char *p;
int total = overlay_heads.bytes + overlay_tails.bytes;
if (total > overlay_str_len)
- overlay_str_buf = (char *)xrealloc (overlay_str_buf,
- overlay_str_len = total);
+ {
+ overlay_str_len = total;
+ overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf,
+ total);
+ }
p = overlay_str_buf;
for (i = overlay_tails.used; --i >= 0;)
{
if (startpos > endpos)
{
int tem;
- Fset_marker (OVERLAY_START (overlay), endpos, Qnil);
- Fset_marker (OVERLAY_END (overlay), startpos, Qnil);
+ Fset_marker (OVERLAY_START (overlay), make_number (endpos),
+ Qnil);
+ Fset_marker (OVERLAY_END (overlay), make_number (startpos),
+ Qnil);
tem = startpos; startpos = endpos; endpos = tem;
}
/* Add it to the end of the wrong list. Later on,
if (startpos > endpos)
{
int tem;
- Fset_marker (OVERLAY_START (overlay), endpos, Qnil);
- Fset_marker (OVERLAY_END (overlay), startpos, Qnil);
+ Fset_marker (OVERLAY_START (overlay), make_number (endpos),
+ Qnil);
+ Fset_marker (OVERLAY_END (overlay), make_number (startpos),
+ Qnil);
tem = startpos; startpos = endpos; endpos = tem;
}
if (endpos < XINT (current_buffer->overlay_center))
recenter_overlay_lists (current_buffer,
XINT (current_buffer->overlay_center));
}
+
+/* We have two types of overlay: the one whose ending marker is
+ after-insertion-marker (this is the usual case) and the one whose
+ ending marker is before-insertion-marker. When `overlays_before'
+ contains overlays of the latter type and the former type in this
+ order and both overlays end at inserting position, inserting a text
+ increases only the ending marker of the latter type, which results
+ in incorrect ordering of `overlays_before'.
+
+ This function fixes ordering of overlays in the slot
+ `overlays_before' of the buffer *BP. Before the insertion, `point'
+ was at PREV, and now is at POS. */
+
+fix_overlays_before (bp, prev, pos)
+ struct buffer *bp;
+ int prev, pos;
+{
+ Lisp_Object *tailp = &bp->overlays_before;
+ Lisp_Object *right_place;
+ int end;
+
+ /* After the insertion, the several overlays may be in incorrect
+ order. The possibility is that, in the list `overlays_before',
+ an overlay which ends at POS appears after an overlay which ends
+ at PREV. Since POS is greater than PREV, we must fix the
+ ordering of these overlays, by moving overlays ends at POS before
+ the overlays ends at PREV. */
+
+ /* At first, find a place where disordered overlays should be linked
+ in. It is where an overlay which end before POS exists. (i.e. an
+ overlay whose ending marker is after-insertion-marker if disorder
+ exists). */
+ while (!NILP (*tailp)
+ && ((end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car)))
+ >= pos))
+ tailp = &XCONS (*tailp)->cdr;
+
+ /* If we don't find such an overlay,
+ or the found one ends before PREV,
+ or the found one is the last one in the list,
+ we don't have to fix anything. */
+ if (NILP (*tailp)
+ || end < prev
+ || NILP (XCONS (*tailp)->cdr))
+ return;
+
+ right_place = tailp;
+ tailp = &XCONS (*tailp)->cdr;
+
+ /* Now, end position of overlays in the list *TAILP should be before
+ or equal to PREV. In the loop, an overlay which ends at POS is
+ moved ahead to the place pointed by RIGHT_PLACE. If we found an
+ overlay which ends before PREV, the remaining overlays are in
+ correct order. */
+ while (!NILP (*tailp))
+ {
+ end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car));
+
+ if (end == pos)
+ { /* This overlay is disordered. */
+ Lisp_Object found = *tailp;
+
+ /* Unlink the found overlay. */
+ *tailp = XCONS (found)->cdr;
+ /* Move an overlay at RIGHT_PLACE to the next of the found one. */
+ XCONS (found)->cdr = *right_place;
+ /* Link it into the right place. */
+ *right_place = found;
+ }
+ else if (end == prev)
+ tailp = &XCONS (*tailp)->cdr;
+ else /* No more disordered overlay. */
+ break;
+ }
+}
\f
DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0,
"Return t if OBJECT is an overlay.")
return (OVERLAYP (object) ? Qt : Qnil);
}
-DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 0,
+DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0,
"Create a new overlay with range BEG to END in BUFFER.\n\
If omitted, BUFFER defaults to the current buffer.\n\
-BEG and END may be integers or markers.")
- (beg, end, buffer)
+BEG and END may be integers or markers.\n\
+The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
+front delimiter advance when text is inserted there.\n\
+The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
+rear delimiter advance when text is inserted there.")
+ (beg, end, buffer, front_advance, rear_advance)
Lisp_Object beg, end, buffer;
+ Lisp_Object front_advance, rear_advance;
{
Lisp_Object overlay;
struct buffer *b;
beg = Fset_marker (Fmake_marker (), beg, buffer);
end = Fset_marker (Fmake_marker (), end, buffer);
- XMARKER (end)->insertion_type = 1;
+ if (!NILP (front_advance))
+ XMARKER (beg)->insertion_type = 1;
+ if (!NILP (rear_advance))
+ XMARKER (end)->insertion_type = 1;
overlay = allocate_misc ();
XMISCTYPE (overlay) = Lisp_Misc_Overlay;
return overlay;
}
+\f
+/* Mark a section of BUF as needing redisplay because of overlays changes. */
+
+static void
+modify_overlay (buf, start, end)
+ struct buffer *buf;
+ int start, end;
+{
+ if (start == end)
+ return;
+
+ if (start > end)
+ {
+ int temp = start;
+ start = end; end = temp;
+ }
+
+ /* If this is a buffer not in the selected window,
+ we must do other windows. */
+ if (buf != XBUFFER (XWINDOW (selected_window)->buffer))
+ windows_or_buffers_changed = 1;
+ /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */
+ else if (buf != current_buffer)
+ windows_or_buffers_changed = 1;
+ /* If multiple windows show this buffer, we must do other windows. */
+ else if (buffer_shared > 1)
+ windows_or_buffers_changed = 1;
+ else
+ {
+ if (unchanged_modified == MODIFF
+ && overlay_unchanged_modified == OVERLAY_MODIFF)
+ {
+ beg_unchanged = start - BEG;
+ end_unchanged = Z - end;
+ }
+ else
+ {
+ if (Z - end < end_unchanged)
+ end_unchanged = Z - end;
+ if (start - BEG < beg_unchanged)
+ beg_unchanged = start - BEG;
+ }
+ }
+
+ ++OVERLAY_MODIFF;
+}
+
+\f\f
+Lisp_Object Fdelete_overlay ();
DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0,
"Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
/* Redisplay where the overlay was. */
if (!NILP (obuffer))
{
- Lisp_Object o_beg;
- Lisp_Object o_end;
+ int o_beg;
+ int o_end;
- o_beg = OVERLAY_START (overlay);
- o_end = OVERLAY_END (overlay);
- o_beg = OVERLAY_POSITION (o_beg);
- o_end = OVERLAY_POSITION (o_end);
+ o_beg = OVERLAY_POSITION (OVERLAY_START (overlay));
+ o_end = OVERLAY_POSITION (OVERLAY_END (overlay));
- redisplay_region (ob, XINT (o_beg), XINT (o_end));
+ modify_overlay (ob, o_beg, o_end);
}
/* Redisplay where the overlay is going to be. */
- redisplay_region (b, XINT (beg), XINT (end));
+ modify_overlay (b, XINT (beg), XINT (end));
}
else
/* Redisplay the area the overlay has just left, or just enclosed. */
{
- Lisp_Object o_beg;
- Lisp_Object o_end;
+ int o_beg, o_end;
int change_beg, change_end;
- o_beg = OVERLAY_START (overlay);
- o_end = OVERLAY_END (overlay);
- o_beg = OVERLAY_POSITION (o_beg);
- o_end = OVERLAY_POSITION (o_end);
+ o_beg = OVERLAY_POSITION (OVERLAY_START (overlay));
+ o_end = OVERLAY_POSITION (OVERLAY_END (overlay));
- if (XINT (o_beg) == XINT (beg))
- redisplay_region (b, XINT (o_end), XINT (end));
- else if (XINT (o_end) == XINT (end))
- redisplay_region (b, XINT (o_beg), XINT (beg));
+ if (o_beg == XINT (beg))
+ modify_overlay (b, o_end, XINT (end));
+ else if (o_end == XINT (end))
+ modify_overlay (b, o_beg, XINT (beg));
else
{
- if (XINT (beg) < XINT (o_beg)) o_beg = beg;
- if (XINT (end) > XINT (o_end)) o_end = end;
- redisplay_region (b, XINT (o_beg), XINT (o_end));
+ if (XINT (beg) < o_beg) o_beg = XINT (beg);
+ if (XINT (end) > o_end) o_end = XINT (end);
+ modify_overlay (b, o_beg, o_end);
}
}
b->overlays_before = Fdelq (overlay, b->overlays_before);
b->overlays_after = Fdelq (overlay, b->overlays_after);
- redisplay_region (b,
+ modify_overlay (b,
marker_position (OVERLAY_START (overlay)),
marker_position (OVERLAY_END (overlay)));
}
\f
DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0,
- "Get the property of overlay OVERLAY with property name NAME.")
+ "Get the property of overlay OVERLAY with property name PROP.")
(overlay, prop)
Lisp_Object overlay, prop;
{
if (! NILP (buffer))
{
if (changed)
- redisplay_region (XBUFFER (buffer),
+ modify_overlay (XBUFFER (buffer),
marker_position (OVERLAY_START (overlay)),
marker_position (OVERLAY_END (overlay)));
if (EQ (prop, Qevaporate) && ! NILP (value)
old = last_overlay_modification_hooks;
last_overlay_modification_hooks
= Fmake_vector (make_number (oldsize * 2), Qnil);
- bcopy (XVECTOR (last_overlay_modification_hooks)->contents,
- XVECTOR (old)->contents,
+ bcopy (XVECTOR (old)->contents,
+ XVECTOR (last_overlay_modification_hooks)->contents,
sizeof (Lisp_Object) * oldsize);
}
XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist;
{
register Lisp_Object tem;
+ buffer_permanent_local_flags = 0;
+
/* Make sure all markable slots in buffer_defaults
are initialized reasonably, so mark_buffer won't choke. */
reset_buffer (&buffer_defaults);
- reset_buffer_local_variables (&buffer_defaults);
+ reset_buffer_local_variables (&buffer_defaults, 1);
reset_buffer (&buffer_local_symbols);
- reset_buffer_local_variables (&buffer_local_symbols);
+ reset_buffer_local_variables (&buffer_local_symbols, 1);
/* Prevent GC from getting confused. */
buffer_defaults.text = &buffer_defaults.own_text;
buffer_local_symbols.text = &buffer_local_symbols.own_text;
XSETFASTINT (buffer_defaults.tab_width, 8);
buffer_defaults.truncate_lines = Qnil;
buffer_defaults.ctl_arrow = Qt;
+ buffer_defaults.direction_reversed = Qnil;
#ifdef DOS_NT
buffer_defaults.buffer_file_type = Qnil; /* TEXT */
#endif
+ buffer_defaults.enable_multibyte_characters = Qt;
+ buffer_defaults.buffer_file_coding_system = Qnil;
XSETFASTINT (buffer_defaults.fill_column, 70);
XSETFASTINT (buffer_defaults.left_margin, 0);
buffer_defaults.cache_long_line_scans = Qnil;
buffer_defaults.file_truename = Qnil;
+ XSETFASTINT (buffer_defaults.display_count, 0);
/* Assign the local-flags to the slots that have default values.
The local flag is a bit that is used in the buffer
XSETINT (buffer_local_flags.point_before_scroll, -1);
XSETINT (buffer_local_flags.file_truename, -1);
XSETINT (buffer_local_flags.invisibility_spec, -1);
- XSETFASTINT (buffer_local_flags.file_format, -1);
+ XSETINT (buffer_local_flags.file_format, -1);
+ XSETINT (buffer_local_flags.display_count, -1);
XSETFASTINT (buffer_local_flags.mode_line_format, 1);
XSETFASTINT (buffer_local_flags.abbrev_mode, 2);
XSETFASTINT (buffer_local_flags.left_margin, 0x800);
XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000);
XSETFASTINT (buffer_local_flags.display_table, 0x2000);
- XSETFASTINT (buffer_local_flags.syntax_table, 0x8000);
- XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000);
#ifdef DOS_NT
XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000);
+ /* Make this one a permanent local. */
+ buffer_permanent_local_flags |= 0x4000;
#endif
-
+ XSETFASTINT (buffer_local_flags.syntax_table, 0x8000);
+ XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000);
+ XSETFASTINT (buffer_local_flags.category_table, 0x20000);
+ XSETFASTINT (buffer_local_flags.direction_reversed, 0x40000);
+ XSETFASTINT (buffer_local_flags.enable_multibyte_characters, 0x80000);
+ /* Make this one a permanent local. */
+ buffer_permanent_local_flags |= 0x80000;
+ XSETFASTINT (buffer_local_flags.buffer_file_coding_system, 0x100000);
+ /* Make this one a permanent local. */
+ buffer_permanent_local_flags |= 0x100000;
+
Vbuffer_alist = Qnil;
current_buffer = 0;
all_buffers = 0;
Qkill_buffer_hook = intern ("kill-buffer-hook");
Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1"));
+
/* super-magic invisible buffer */
Vbuffer_alist = Qnil;
buf[rc + 1] = '\0';
}
#endif /* not VMS */
+
current_buffer->directory = build_string (buf);
+ /* Add /: to the front of the name
+ if it would otherwise be treated as magic. */
+ temp = Ffind_file_name_handler (current_buffer->directory, Qt);
+ if (! NILP (temp))
+ current_buffer->directory
+ = concat2 (build_string ("/:"), current_buffer->directory);
+
temp = get_minibuffer (0);
XBUFFER (temp)->directory = current_buffer->directory;
}
"Default value of `ctl-arrow' for buffers that do not override it.\n\
This is the same as (default-value 'ctl-arrow).");
+ DEFVAR_LISP_NOPRO ("default-direction-reversed",
+ &buffer_defaults.direction_reversed,
+ "Default value of `direction_reversed' for buffers that do not override it.\n\
+ This is the same as (default-value 'direction-reversed).");
+
+ DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
+ &buffer_defaults.enable_multibyte_characters,
+ "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
+ This is the same as (default-value 'enable-multibyte-characters).");
+
+ DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
+ &buffer_defaults.buffer_file_coding_system,
+ "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
+ This is the same as (default-value 'buffer-file-coding-system).");
+
DEFVAR_LISP_NOPRO ("default-truncate-lines",
&buffer_defaults.truncate_lines,
"Default value of `truncate-lines' for buffers that do not override it.\n\
% means buffer is read-only and * means it is modified.\n\
For a modified read-only buffer, %* gives % and %+ gives *.\n\
%s -- print process status. %l -- print the current line number.\n\
+ %c -- print the current column number (this makes editing slower).\n\
+ To make the column number update correctly in all cases,\n\
+ `column-number-mode' must be non-nil.\n\
%p -- print percent of buffer above top of window, or Top, Bot or All.\n\
%P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
or print Bottom or All.\n\
%n -- print Narrow if appropriate.\n\
- %t -- print T if files is text, B if binary.\n\
+ %t -- print T if file is text, B if binary.\n\
%[ -- print one [ for each recursive editing level. %] similar.\n\
%% -- print %. %- -- print infinitely many dashes.\n\
Decimal digits after the % specify field width to which to pad.");
DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil,
"*Non-nil means display control chars with uparrow.\n\
-Nil means use backslash and octal digits.\n\
+A value of nil means use backslash and octal digits.\n\
Automatically becomes buffer-local when set in any fashion.\n\
This variable does not apply to characters whose display is specified\n\
in the current display table (if there is one).");
+ DEFVAR_PER_BUFFER ("enable-multibyte-characters",
+ ¤t_buffer->enable_multibyte_characters, Qnil,
+ "*Non-nil means the buffer contents are regarded as multi-byte form\n\
+of characters, not a binary code. This affects the display, file I/O,\n\
+and behaviors of various editing commands.");
+
+ DEFVAR_PER_BUFFER ("buffer-file-coding-system",
+ ¤t_buffer->buffer_file_coding_system, Qnil,
+ "Coding system to be used for encoding the buffer contents on saving.\n\
+If it is nil, the buffer is saved without any code conversion unless\n\
+some coding system is specified in file-coding-system-alist\n\
+for the buffer file.\n\
+\n\
+This variable is never applied to a way of decoding\n\
+a file while reading it.");
+
+ DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed,
+ Qnil,
+ "*Non-nil means lines in the buffer are displayed right to left.");
+
DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil,
"*Non-nil means do not display continuation lines;\n\
give each line of text one screen line.\n\
DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function,
Qnil,
"Function called (if non-nil) to perform auto-fill.\n\
-It is called after self-inserting a space at a column beyond `fill-column'.\n\
+It is called after self-inserting a space or newline.\n\
Each buffer has its own value of this variable.\n\
-NOTE: This variable is not an ordinary hook;\n\
-It may not be a list of functions.");
+NOTE: This variable is not a hook;\n\
+its value may not be a list of functions.");
DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename,
make_number (Lisp_String),
"Don't ask.");
*/
DEFVAR_LISP ("before-change-function", &Vbefore_change_function,
- "Function to call before each text change.\n\
+ "If non-nil, a function to call before each text change (obsolete).\n\
Two arguments are passed to the function: the positions of\n\
the beginning and end of the range of old text to be changed.\n\
\(For an insertion, the beginning and end are at the same place.)\n\
That's because these variables are temporarily set to nil.\n\
As a result, a hook function cannot straightforwardly alter the value of\n\
these variables. See the Emacs Lisp manual for a way of\n\
-accomplishing an equivalent result by using other variables.");
+accomplishing an equivalent result by using other variables.\n\n\
+This variable is obsolete; use `before-change-functions' instead.");
Vbefore_change_function = Qnil;
DEFVAR_LISP ("after-change-function", &Vafter_change_function,
- "Function to call after each text change.\n\
+ "If non-nil, a Function to call after each text change (obsolete).\n\
Three arguments are passed to the function: the positions of\n\
the beginning and end of the range of changed text,\n\
and the length of the pre-change text replaced by that range.\n\
That's because these variables are temporarily set to nil.\n\
As a result, a hook function cannot straightforwardly alter the value of\n\
these variables. See the Emacs Lisp manual for a way of\n\
-accomplishing an equivalent result by using other variables.");
+accomplishing an equivalent result by using other variables.\n\n\
+This variable is obsolete; use `after-change-functions' instead.");
Vafter_change_function = Qnil;
DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions,
was modified between BEG and END. PROPERTY is the property name,\n\
and VALUE is the old value.\n\
\n\
+An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
+was adjusted in position by the offset DISTANCE (an integer).\n\
+\n\
An entry of the form POSITION indicates that point was at the buffer\n\
location given by the integer. Undoing an entry of this form places\n\
point at POSITION.\n\
then characters with property value PROP are invisible,\n\
and they have an ellipsis as well if ELLIPSIS is non-nil.");
+ DEFVAR_PER_BUFFER ("buffer-display-count",
+ ¤t_buffer->display_count, Qnil,
+ "A number incremented each time the buffer is displayed in a window.");
+
DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode,
- "*Non-nil means deactivate the mark when the buffer contents change.");
+ "*Non-nil means deactivate the mark when the buffer contents change.\n\
+Non-nil also enables highlighting of the region whenever the mark is active.\n\
+The variable `highlight-nonselected-windows' controls whether to highlight\n\
+all windows or just the selected window.");
Vtransient_mark_mode = Qnil;
DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only,
"List of functions called with no args to query before killing a buffer.");
Vkill_buffer_query_functions = Qnil;
+ defsubr (&Sbuffer_live_p);
defsubr (&Sbuffer_list);
defsubr (&Sget_buffer);
defsubr (&Sget_file_buffer);