/* Buffer manipulation primitives for GNU Emacs.
Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994,
1995, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, Inc.
This file is part of GNU Emacs.
int last_per_buffer_idx;
-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 ();
+EXFUN (Fset_buffer, 1);
+void set_buffer_internal P_ ((struct buffer *b));
+void set_buffer_internal_1 P_ ((struct buffer *b));
+static void call_overlay_mod_hooks P_ ((Lisp_Object list, Lisp_Object overlay,
+ int after, Lisp_Object arg1,
+ Lisp_Object arg2, Lisp_Object arg3));
+static void swap_out_buffer_local_variables P_ ((struct buffer *b));
+static void reset_buffer_local_variables P_ ((struct buffer *b, int permanent_too));
/* Alist of all buffer names vs the buffers. */
/* This used to be a variable, but is no longer,
int inhibit_modification_hooks;
Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local;
+Lisp_Object Qpermanent_local_hook;
Lisp_Object Qprotected_field;
XSETBUFFER (to_buffer, to);
- for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object);
+ /* buffer-local Lisp variables start at `undo_list',
+ tho only the ones from `name' on are GC'd normally. */
+ for (offset = PER_BUFFER_VAR_OFFSET (undo_list) + sizeof (Lisp_Object);
offset < sizeof *to;
offset += sizeof (Lisp_Object))
{
it does not treat permanent locals consistently.
Instead, use Fkill_all_local_variables.
- If PERMANENT_TOO is 1, then we reset permanent built-in
+ If PERMANENT_TOO is 1, then we reset permanent
buffer-local variables. If PERMANENT_TOO is 0,
we preserve those. */
#endif
/* Reset all (or most) per-buffer variables to their defaults. */
- b->local_var_alist = Qnil;
+ if (permanent_too)
+ b->local_var_alist = Qnil;
+ else
+ {
+ Lisp_Object tmp, prop, last = Qnil;
+ for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp))
+ if (CONSP (XCAR (tmp))
+ && SYMBOLP (XCAR (XCAR (tmp)))
+ && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local)))
+ {
+ /* If permanent-local, keep it. */
+ last = tmp;
+ if (EQ (prop, Qpermanent_local_hook))
+ {
+ /* This is a partially permanent hook variable.
+ Preserve only the elements that want to be preserved. */
+ Lisp_Object list, newlist;
+ list = XCDR (XCAR (tmp));
+ if (!CONSP (list))
+ newlist = list;
+ else
+ for (newlist = Qnil; CONSP (list); list = XCDR (list))
+ {
+ Lisp_Object elt = XCAR (list);
+ /* Preserve element ELT if it's t,
+ if it is a function with a `permanent-local-hook' property,
+ or if it's not a symbol. */
+ if (! SYMBOLP (elt)
+ || EQ (elt, Qt)
+ || !NILP (Fget (elt, Qpermanent_local_hook)))
+ newlist = Fcons (elt, newlist);
+ }
+ XSETCDR (XCAR (tmp), Fnreverse (newlist));
+ }
+ }
+ /* Delete this local variable. */
+ else if (NILP (last))
+ b->local_var_alist = XCDR (tmp);
+ else
+ XSETCDR (last, XCDR (tmp));
+ }
+
for (i = 0; i < last_per_buffer_idx; ++i)
if (permanent_too || buffer_permanent_local_flags[i] == 0)
SET_PER_BUFFER_VALUE_P (b, i, 0);
/* For each slot that has a default value,
copy that into the slot. */
- for (offset = PER_BUFFER_VAR_OFFSET (name);
+ /* buffer-local Lisp variables start at `undo_list',
+ tho only the ones from `name' on are GC'd normally. */
+ for (offset = PER_BUFFER_VAR_OFFSET (undo_list);
offset < sizeof *b;
offset += sizeof (Lisp_Object))
{
int found = 0;
/* Look in special slots */
- for (offset = PER_BUFFER_VAR_OFFSET (name);
+ /* buffer-local Lisp variables start at `undo_list',
+ tho only the ones from `name' on are GC'd normally. */
+ for (offset = PER_BUFFER_VAR_OFFSET (undo_list);
offset < sizeof (struct buffer);
/* sizeof EMACS_INT == sizeof Lisp_Object */
offset += (sizeof (EMACS_INT)))
{
int offset, idx;
- for (offset = PER_BUFFER_VAR_OFFSET (name);
+ /* buffer-local Lisp variables start at `undo_list',
+ tho only the ones from `name' on are GC'd normally. */
+ for (offset = PER_BUFFER_VAR_OFFSET (undo_list);
offset < sizeof (struct buffer);
/* sizeof EMACS_INT == sizeof Lisp_Object */
offset += (sizeof (EMACS_INT)))
}
\f
DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
- "sRename buffer (to new name): \nP",
+ "(list (read-string \"Rename buffer (to new name): \" \
+ nil 'buffer-name-history (buffer-name (current-buffer))) \
+ current-prefix-arg)",
doc: /* Change current buffer's name to NEWNAME (a string).
If second arg UNIQUE is nil or omitted, it is an error if a
buffer named NEWNAME already exists.
Vbuffer_alist = link;
/* Effectively do a delq on buried_buffer_list. */
-
+
prev = Qnil;
for (link = XFRAME (frame)->buried_buffer_list; CONSP (link);
link = XCDR (link))
}
err = no_switch_window (selected_window);
- if (err) error (err);
+ if (err)
+ /* If can't display in current window, let pop-to-buffer
+ try some other window. */
+ return call3 (intern ("pop-to-buffer"), buffer, Qnil, norecord);
return switch_to_buffer_1 (buffer, norecord);
}
return byte_pos;
}
+DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
+ 1, 1, 0,
+ doc: /* Swap the text between current buffer and BUFFER. */)
+ (buffer)
+ Lisp_Object buffer;
+{
+ struct buffer *other_buffer;
+ CHECK_BUFFER (buffer);
+ other_buffer = XBUFFER (buffer);
+
+ /* Actually, it probably works just fine.
+ * if (other_buffer == current_buffer)
+ * error ("Cannot swap a buffer's text with itself"); */
+
+ /* Actually, this may be workable as well, tho probably only if they're
+ *both* indirect. */
+ if (other_buffer->base_buffer
+ || current_buffer->base_buffer)
+ error ("Cannot swap indirect buffers's text");
+
+ { /* This is probably harder to make work. */
+ struct buffer *other;
+ for (other = all_buffers; other; other = other->next)
+ if (other->base_buffer == other_buffer
+ || other->base_buffer == current_buffer)
+ error ("One of the buffers to swap has indirect buffers");
+ }
+
+#define swapfield(field, type) \
+ do { \
+ type tmp##field = other_buffer->field; \
+ other_buffer->field = current_buffer->field; \
+ current_buffer->field = tmp##field; \
+ } while (0)
+
+ swapfield (own_text, struct buffer_text);
+ eassert (current_buffer->text == ¤t_buffer->own_text);
+ eassert (other_buffer->text == &other_buffer->own_text);
+ swapfield (pt, EMACS_INT);
+ swapfield (pt_byte, EMACS_INT);
+ swapfield (begv, EMACS_INT);
+ swapfield (begv_byte, EMACS_INT);
+ swapfield (zv, EMACS_INT);
+ swapfield (zv_byte, EMACS_INT);
+ eassert (!current_buffer->base_buffer);
+ eassert (!other_buffer->base_buffer);
+ current_buffer->clip_changed = 1; other_buffer->clip_changed = 1;
+ swapfield (newline_cache, struct region_cache *);
+ swapfield (width_run_cache, struct region_cache *);
+ current_buffer->prevent_redisplay_optimizations_p = 1;
+ other_buffer->prevent_redisplay_optimizations_p = 1;
+ swapfield (overlays_before, struct Lisp_Overlay *);
+ swapfield (overlays_after, struct Lisp_Overlay *);
+ swapfield (overlay_center, EMACS_INT);
+ swapfield (undo_list, Lisp_Object);
+ swapfield (mark, Lisp_Object);
+ if (MARKERP (current_buffer->mark) && XMARKER (current_buffer->mark)->buffer)
+ XMARKER (current_buffer->mark)->buffer = current_buffer;
+ if (MARKERP (other_buffer->mark) && XMARKER (other_buffer->mark)->buffer)
+ XMARKER (other_buffer->mark)->buffer = other_buffer;
+ swapfield (enable_multibyte_characters, Lisp_Object);
+ /* FIXME: Not sure what we should do with these *_marker fields.
+ Hopefully they're just nil anyway. */
+ swapfield (pt_marker, Lisp_Object);
+ swapfield (begv_marker, Lisp_Object);
+ swapfield (zv_marker, Lisp_Object);
+ current_buffer->point_before_scroll = Qnil;
+ other_buffer->point_before_scroll = Qnil;
+
+ current_buffer->text->modiff++; other_buffer->text->modiff++;
+ current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++;
+ current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++;
+ current_buffer->text->beg_unchanged = current_buffer->text->gpt;
+ current_buffer->text->end_unchanged = current_buffer->text->gpt;
+ other_buffer->text->beg_unchanged = current_buffer->text->gpt;
+ other_buffer->text->end_unchanged = current_buffer->text->gpt;
+ {
+ struct Lisp_Marker *m;
+ for (m = BUF_MARKERS (current_buffer); m; m = m->next)
+ if (m->buffer == other_buffer)
+ m->buffer = current_buffer;
+ for (m = BUF_MARKERS (other_buffer); m; m = m->next)
+ if (m->buffer == current_buffer)
+ m->buffer = other_buffer;
+ }
+ if (current_buffer->text->intervals)
+ (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)),
+ XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer));
+ if (other_buffer->text->intervals)
+ (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())),
+ XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer));
+
+ return Qnil;
+}
+
DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte,
1, 1, 0,
doc: /* Set the multibyte flag of the current buffer to FLAG.
the normal hook `change-major-mode-hook'. */)
()
{
- register Lisp_Object alist, sym, tem;
- Lisp_Object oalist;
-
if (!NILP (Vrun_hooks))
call1 (Vrun_hooks, Qchange_major_mode_hook);
- oalist = current_buffer->local_var_alist;
- /* Make sure none of the bindings in oalist
+ /* Make sure none of the bindings in local_var_alist
remain swapped in, in their symbols. */
swap_out_buffer_local_variables (current_buffer);
reset_buffer_local_variables (current_buffer, 0);
- /* Any which are supposed to be permanent,
- make local again, with the same values they had. */
-
- for (alist = oalist; CONSP (alist); alist = XCDR (alist))
- {
- sym = XCAR (XCAR (alist));
- tem = Fget (sym, Qpermanent_local);
- if (! NILP (tem))
- {
- Fmake_local_variable (sym);
- Fset (sym, XCDR (XCAR (alist)));
- }
- }
-
/* Force mode-line redisplay. Useful here because all major mode
commands call this function. */
update_mode_lines++;
int extend;
Lisp_Object **vec_ptr;
int *len_ptr;
- int *next_ptr;
- int *prev_ptr;
+ EMACS_INT *next_ptr;
+ EMACS_INT *prev_ptr;
int change_req;
{
Lisp_Object overlay, start, end;
return idx;
}
\f
-/* Find all the overlays in the current buffer that overlap the range BEG-END
- or are empty at BEG.
+/* Find all the overlays in the current buffer that overlap the range
+ BEG-END, or are empty at BEG, or are empty at END provided END
+ denotes the position at the end of the current buffer.
Return the number found, and store them in a vector in *VEC_PTR.
Store in *LEN_PTR the size allocated for the vector.
int next = ZV;
int prev = BEGV;
int inhibit_storing = 0;
+ int end_is_Z = end == Z;
for (tail = current_buffer->overlays_before; tail; tail = tail->next)
{
break;
}
startpos = OVERLAY_POSITION (ostart);
- /* Count an interval if it either overlaps the range
- or is empty at the start of the range. */
+ /* Count an interval if it overlaps the range, is empty at the
+ start of the range, or is empty at END provided END denotes the
+ end of the buffer. */
if ((beg < endpos && startpos < end)
- || (startpos == endpos && beg == endpos))
+ || (startpos == endpos
+ && (beg == endpos || (end_is_Z && endpos == end))))
{
if (idx == len)
{
break;
}
endpos = OVERLAY_POSITION (oend);
- /* Count an interval if it either overlaps the range
- or is empty at the start of the range. */
+ /* Count an interval if it overlaps the range, is empty at the
+ start of the range, or is empty at END provided END denotes the
+ end of the buffer. */
if ((beg < endpos && startpos < end)
- || (startpos == endpos && beg == endpos))
+ || (startpos == endpos
+ && (beg == endpos || (end_is_Z && endpos == end))))
{
if (idx == len)
{
/* Put all the overlays we want in a vector in overlay_vec.
Store the length in len. */
noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
- (int *) 0, (int *) 0, 0);
+ (EMACS_INT *) 0, (EMACS_INT *) 0, 0);
/* Make a list of them all. */
result = Flist (noverlays, overlay_vec);
doc: /* Return a list of the overlays that overlap the region BEG ... END.
Overlap means that at least one character is contained within the overlay
and also contained within the specified region.
-Empty overlays are included in the result if they are located at BEG
-or between BEG and END. */)
+Empty overlays are included in the result if they are located at BEG,
+between BEG and END, or at END provided END denotes the position at the
+end of the buffer. */)
(beg, end)
Lisp_Object beg, end;
{
Lisp_Object pos;
{
int noverlays;
- int endpos;
+ EMACS_INT endpos;
Lisp_Object *overlay_vec;
int len;
int i;
Store the length in len.
endpos gets the position where the next overlay starts. */
noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
- &endpos, (int *) 0, 1);
+ &endpos, (EMACS_INT *) 0, 1);
/* If any of these overlays ends before endpos,
use its ending point instead. */
for (i = 0; i < noverlays; i++)
{
Lisp_Object oend;
- int oendpos;
+ EMACS_INT oendpos;
oend = OVERLAY_END (overlay_vec[i]);
oendpos = OVERLAY_POSITION (oend);
Lisp_Object pos;
{
int noverlays;
- int prevpos;
+ EMACS_INT prevpos;
Lisp_Object *overlay_vec;
int len;
Store the length in len.
prevpos gets the position of the previous change. */
noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len,
- (int *) 0, &prevpos, 1);
+ (EMACS_INT *) 0, &prevpos, 1);
xfree (overlay_vec);
return make_number (prevpos);
if (last_overlay_modification_hooks_used == oldsize)
last_overlay_modification_hooks = larger_vector
(last_overlay_modification_hooks, oldsize * 2, Qnil);
- AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist;
- AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay;
+ ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used,
+ functionlist); last_overlay_modification_hooks_used++;
+ ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used,
+ overlay); last_overlay_modification_hooks_used++;
}
\f
/* Run the modification-hooks of overlays that include
shrink it. */
void
-enlarge_buffer_text (b, delta)
- struct buffer *b;
- int delta;
+enlarge_buffer_text (struct buffer *b, EMACS_INT delta)
{
POINTER_TYPE *p;
size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1
staticpro (&Vbuffer_alist);
staticpro (&Qprotected_field);
staticpro (&Qpermanent_local);
+ Qpermanent_local_hook = intern ("permanent-local-hook");
+ staticpro (&Qpermanent_local_hook);
staticpro (&Qkill_buffer_hook);
Qoverlayp = intern ("overlayp");
staticpro (&Qoverlayp);
staticpro (&Qbefore_change_functions);
Qafter_change_functions = intern ("after-change-functions");
staticpro (&Qafter_change_functions);
+ /* The next one is initialized in init_buffer_once. */
staticpro (&Qucs_set_table_for_input);
Qkill_buffer_query_functions = intern ("kill-buffer-query-functions");
DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name,
Qnil,
- doc: /* Pretty name of current buffer's major mode (a string). */);
+ doc: /* Pretty name of current buffer's major mode.
+Usually a string. See `mode-line-format' for other possible forms.
+Use the function `format-mode-line' to get the value as a string. */);
DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil,
doc: /* Local (mode-specific) abbrev table of current buffer. */);
defsubr (&Sbarf_if_buffer_read_only);
defsubr (&Sbury_buffer);
defsubr (&Serase_buffer);
+ defsubr (&Sbuffer_swap_text);
defsubr (&Sset_buffer_multibyte);
defsubr (&Skill_all_local_variables);
HCoop / bpt / emacs.git / blobdiff