/* Buffer manipulation primitives for GNU Emacs.
- Copyright (C) 1985, 1986, 1987, 1988, 1989, 1992, 1993
+ Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994
Free Software Foundation, Inc.
This file is part of GNU Emacs.
#define MAXPATHLEN 1024
#endif /* not MAXPATHLEN */
-#include "config.h"
+#include <config.h>
#include "lisp.h"
#include "intervals.h"
#include "window.h"
#include "commands.h"
#include "buffer.h"
-#include "syntax.h"
#include "indent.h"
#include "blockinput.h"
Lisp_Object Fset_buffer ();
void set_buffer_internal ();
+static void call_overlay_mod_hooks ();
/* Alist of all buffer names vs the buffers. */
/* This used to be a variable, but is no longer,
/* Functions to call before and after each text change. */
Lisp_Object Vbefore_change_function;
Lisp_Object Vafter_change_function;
+Lisp_Object Vbefore_change_functions;
+Lisp_Object Vafter_change_functions;
Lisp_Object Vtransient_mark_mode;
+/* t means ignore all read-only text properties.
+ A list means ignore such a property if its value is a member of the list.
+ Any non-nil value means ignore buffer-read-only. */
+Lisp_Object Vinhibit_read_only;
+
+/* List of functions to call that can query about killing a buffer.
+ If any of these functions returns nil, we don't kill it. */
+Lisp_Object Vkill_buffer_query_functions;
+
/* List of functions to call before changing an unmodified buffer. */
Lisp_Object Vfirst_change_hook;
Lisp_Object Qfirst_change_hook;
Lisp_Object Qkill_buffer_hook;
+Lisp_Object Qget_file_buffer;
+
+Lisp_Object Qoverlayp;
+
+Lisp_Object Qpriority, Qwindow, Qevaporate;
+
+Lisp_Object Qmodification_hooks;
+Lisp_Object Qinsert_in_front_hooks;
+Lisp_Object Qinsert_behind_hooks;
+
/* For debugging; temporary. See set_buffer_internal. */
/* Lisp_Object Qlisp_mode, Vcheck_symbol; */
DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0,
"Return the buffer visiting file FILENAME (a string).\n\
+The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
If there is no such live buffer, return nil.")
(filename)
register Lisp_Object filename;
{
register Lisp_Object tail, buf, tem;
+ Lisp_Object handler;
+
CHECK_STRING (filename, 0);
filename = Fexpand_file_name (filename, Qnil);
+ /* If the file name has special constructs in it,
+ call the corresponding file handler. */
+ handler = Ffind_file_name_handler (filename, Qget_file_buffer);
+ if (!NILP (handler))
+ return call2 (handler, Qget_file_buffer, filename);
+
for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr)
{
buf = Fcdr (XCONS (tail)->car);
if (!NILP (buf))
return buf;
+ if (XSTRING (name)->size == 0)
+ error ("Empty string for buffer name is not allowed");
+
b = (struct buffer *) xmalloc (sizeof (struct buffer));
BUF_GAP_SIZE (b) = 20;
b->undo_list = Qt;
reset_buffer (b);
+ reset_buffer_local_variables (b);
/* Put this in the alist of all live buffers. */
XSET (buf, Lisp_Buffer, b);
return unbind_to (count, buf);
}
-/* Reinitialize everything about a buffer except its name and contents. */
+/* Reinitialize everything about a buffer except its name and contents
+ and local variables. */
void
reset_buffer (b)
b->last_window_start = 1;
b->backed_up = Qnil;
b->auto_save_modified = 0;
+ b->auto_save_failure_time = -1;
b->auto_save_file_name = Qnil;
b->read_only = Qnil;
b->overlays_before = Qnil;
b->overlays_after = Qnil;
XFASTINT (b->overlay_center) = 1;
+ b->mark_active = Qnil;
/* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */
INITIALIZE_INTERVAL (b, NULL_INTERVAL);
-
- reset_buffer_local_variables(b);
}
+/* 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. */
+
reset_buffer_local_variables (b)
register struct buffer *b;
{
b->minor_modes = Qnil;
b->downcase_table = Vascii_downcase_table;
b->upcase_table = Vascii_upcase_table;
- b->case_canon_table = Vascii_downcase_table;
- b->case_eqv_table = Vascii_upcase_table;
- b->mark_active = Qnil;
+ b->case_canon_table = Vascii_canon_table;
+ b->case_eqv_table = Vascii_eqv_table;
#if 0
b->sort_table = XSTRING (Vascii_sort_table);
b->folding_sort_table = XSTRING (Vascii_folding_sort_table);
for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags;
offset < sizeof (struct buffer);
- offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */
- if (*(int *)(offset + (char *) &buffer_local_flags) > 0
- || *(int *)(offset + (char *) &buffer_local_flags) == -2)
+ offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */
+ if (*(EMACS_INT *)(offset + (char *) &buffer_local_flags) > 0
+ || *(EMACS_INT *)(offset + (char *) &buffer_local_flags) == -2)
*(Lisp_Object *)(offset + (char *)b) =
*(Lisp_Object *)(offset + (char *)&buffer_defaults);
}
rename the buffer properly. */
DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name,
- 1, 1, 0,
+ 1, 2, 0,
"Return a string that is the name of no existing buffer based on NAME.\n\
If there is no live buffer named NAME, then return NAME.\n\
Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
-until an unused name is found, and then return that name.")
- (name)
- register Lisp_Object name;
+until an unused name is found, and then return that name.\n\
+Optional second argument IGNORE specifies a name that is okay to use\n\
+\(if it is in the sequence to be tried)\n\
+even if a buffer with that name exists.")
+ (name, ignore)
+ register Lisp_Object name, ignore;
{
register Lisp_Object gentemp, tem;
int count;
{
sprintf (number, "<%d>", ++count);
gentemp = concat2 (name, build_string (number));
+ tem = Fstring_equal (gentemp, ignore);
+ if (!NILP (tem))
+ return gentemp;
tem = Fget_buffer (gentemp);
if (NILP (tem))
return gentemp;
DEFUN ("buffer-local-variables", Fbuffer_local_variables,
Sbuffer_local_variables, 0, 1, 0,
"Return an alist of variables that are buffer-local in BUFFER.\n\
-Each element looks like (SYMBOL . VALUE) and describes one variable.\n\
+Most elements look like (SYMBOL . VALUE), describing one variable.\n\
+For a symbol that is locally unbound, just the symbol appears in the value.\n\
Note that storing new VALUEs in these elements doesn't change the variables.\n\
No argument or nil as argument means use current buffer as BUFFER.")
(buffer)
register Lisp_Object buffer;
{
register struct buffer *buf;
- register Lisp_Object val;
+ register Lisp_Object result;
if (NILP (buffer))
buf = current_buffer;
buf = XBUFFER (buffer);
}
+ result = Qnil;
+
{
/* Reference each variable in the alist in our current buffer.
If inquiring about the current buffer, this gets the current values,
so store them into the alist so the alist is up to date.
If inquiring about some other buffer, this swaps out any values
for that buffer, making the alist up to date automatically. */
- register Lisp_Object tem;
- for (tem = buf->local_var_alist; CONSP (tem); tem = XCONS (tem)->cdr)
+ register Lisp_Object tail;
+ for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr)
{
- Lisp_Object v1 = Fsymbol_value (XCONS (XCONS (tem)->car)->car);
+ Lisp_Object val, elt;
+
+ elt = XCONS (tail)->car;
+
if (buf == current_buffer)
- XCONS (XCONS (tem)->car)->cdr = v1;
+ val = find_symbol_value (XCONS (elt)->car);
+ else
+ val = XCONS (elt)->cdr;
+
+ /* If symbol is unbound, put just the symbol in the list. */
+ if (EQ (val, Qunbound))
+ result = Fcons (XCONS (elt)->car, result);
+ /* Otherwise, put (symbol . value) in the list. */
+ else
+ result = Fcons (Fcons (XCONS (elt)->car, val), result);
}
}
- /* Make a copy of the alist, to return it. */
- val = Fcopy_alist (buf->local_var_alist);
-
/* Add on all the variables stored in special slots. */
{
register int offset, mask;
for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols;
offset < sizeof (struct buffer);
- offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */
+ offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */
{
- mask = *(int *)(offset + (char *) &buffer_local_flags);
+ mask = *(EMACS_INT *)(offset + (char *) &buffer_local_flags);
if (mask == -1 || (buf->local_var_flags & mask))
if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols))
== Lisp_Symbol)
- val = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols),
- *(Lisp_Object *)(offset + (char *)buf)),
- val);
+ result = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols),
+ *(Lisp_Object *)(offset + (char *)buf)),
+ result);
}
}
- return (val);
+
+ return result;
}
\f
register Lisp_Object tem, buf;
CHECK_STRING (name, 0);
+
+ if (XSTRING (name)->size == 0)
+ error ("Empty string is invalid as a buffer name");
+
tem = Fget_buffer (name);
- if (XBUFFER (tem) == current_buffer)
+ /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
+ the buffer automatically so you can create another with the original name.
+ It makes UNIQUE equivalent to
+ (rename-buffer (generate-new-buffer-name NAME)). */
+ if (NILP (unique) && XBUFFER (tem) == current_buffer)
return current_buffer->name;
if (!NILP (tem))
{
if (!NILP (unique))
- name = Fgenerate_new_buffer_name (name);
+ name = Fgenerate_new_buffer_name (name, current_buffer->name);
else
error ("Buffer name \"%s\" is in use", XSTRING (name)->data);
}
XSET (buf, Lisp_Buffer, current_buffer);
Fsetcar (Frassq (buf, Vbuffer_alist), name);
- if (NILP (current_buffer->filename) && !NILP (current_buffer->auto_save_file_name))
+ if (NILP (current_buffer->filename)
+ && !NILP (current_buffer->auto_save_file_name))
call0 (intern ("rename-auto-save-file"));
- return name;
+ /* refetch since that last call may have done GC */
+ return current_buffer->name;
}
DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0,
if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ')
continue;
if (NILP (visible_ok))
- tem = Fget_buffer_window (buf, Qnil);
+ tem = Fget_buffer_window (buf, Qt);
else
tem = Qnil;
if (NILP (tem))
return Fget_buffer_create (build_string ("*scratch*"));
}
\f
-DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1,1,
+DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 0, 1,
0,
- "Make BUFFER stop keeping undo information.")
+ "Make BUFFER stop keeping undo information.\n\
+No argument or nil as argument means do this for the current buffer.")
(buffer)
register Lisp_Object buffer;
{
return Qnil;
}
- /* Run kill-buffer hook with the buffer to be killed the current buffer. */
+ /* Run hooks with the buffer to be killed the current buffer. */
{
register Lisp_Object val;
int count = specpdl_ptr - specpdl;
+ Lisp_Object list;
record_unwind_protect (save_excursion_restore, save_excursion_save ());
set_buffer_internal (b);
- call1 (Vrun_hooks, Qkill_buffer_hook);
+
+ /* First run the query functions; if any query is answered no,
+ don't kill the buffer. */
+ for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list))
+ {
+ tem = call0 (Fcar (list));
+ if (NILP (tem))
+ return unbind_to (count, Qnil);
+ }
+
+ /* Then run the hooks. */
+ if (!NILP (Vrun_hooks))
+ call1 (Vrun_hooks, Qkill_buffer_hook);
unbind_to (count, Qnil);
}
Freplace_buffer_in_windows (buf);
Vinhibit_quit = tem;
- /* Delete any auto-save file. */
- if (XTYPE (b->auto_save_file_name) == Lisp_String)
+ /* Delete any auto-save file, if we saved it in this session. */
+ if (XTYPE (b->auto_save_file_name) == Lisp_String
+ && b->auto_save_modified != 0)
{
Lisp_Object tem;
tem = Fsymbol_value (intern ("delete-auto-save-files"));
: selected_window,
buf);
- return Qnil;
+ return buf;
}
DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0,
Fset_buffer (buf);
record_buffer (buf);
Fselect_window (Fdisplay_buffer (buf, other));
- return Qnil;
+ return buf;
}
DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0,
"Signal a `buffer-read-only' error if the current buffer is read-only.")
()
{
- while (!NILP (current_buffer->read_only))
+ if (!NILP (current_buffer->read_only)
+ && NILP (Vinhibit_read_only))
Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil)));
return Qnil;
}
\f
DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*",
"Delete the entire contents of the current buffer.\n\
-Any clipping restriction in effect (see `narrow-to-region') is removed,\n\
+Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
so the buffer is truly empty after this.")
()
{
args_out_of_range (*b, *e);
}
\f
-Lisp_Object
+static Lisp_Object
list_buffers_1 (files)
Lisp_Object files;
{
register Lisp_Object tail, tem, buf;
Lisp_Object col1, col2, col3, minspace;
register struct buffer *old = current_buffer, *b;
- int desired_point = 0;
+ Lisp_Object desired_point;
Lisp_Object other_file_symbol;
+ desired_point = Qnil;
other_file_symbol = intern ("list-buffers-directory");
XFASTINT (col1) = 19;
- XFASTINT (col2) = 25;
+ XFASTINT (col2) = 26;
XFASTINT (col3) = 40;
XFASTINT (minspace) = 1;
Fset_buffer (Vstandard_output);
-
- tail = intern ("Buffer-menu-mode");
- if (!EQ (tail, current_buffer->major_mode)
- && (tem = Ffboundp (tail), !NILP (tem)))
- call0 (tail);
Fbuffer_disable_undo (Vstandard_output);
current_buffer->read_only = Qnil;
write_string ("\
- MR Buffer Size Mode File\n\
- -- ------ ---- ---- ----\n", -1);
+ MR Buffer Size Mode File\n\
+ -- ------ ---- ---- ----\n", -1);
for (tail = Vbuffer_alist; !NILP (tail); tail = Fcdr (tail))
{
continue;
/* Identify the current buffer. */
if (b == old)
- desired_point = point;
+ XFASTINT (desired_point) = point;
write_string (b == old ? "." : " ", -1);
/* Identify modified buffers */
write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1);
write_string ("\n", -1);
}
- current_buffer->read_only = Qt;
+ tail = intern ("Buffer-menu-mode");
+ if ((tem = Ffboundp (tail), !NILP (tem)))
+ call0 (tail);
set_buffer_internal (old);
-/* Foo. This doesn't work since temp_output_buffer_show sets point to 1
- if (desired_point)
- XBUFFER (Vstandard_output)->text.pointloc = desired_point;
- */
- return Qnil;
+ return desired_point;
}
DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P",
(files)
Lisp_Object files;
{
- internal_with_output_to_temp_buffer ("*Buffer List*",
- list_buffers_1, files);
+ Lisp_Object desired_point;
+
+ desired_point
+ = internal_with_output_to_temp_buffer ("*Buffer List*",
+ list_buffers_1, files);
+
+ if (NUMBERP (desired_point))
+ {
+ int count = specpdl_ptr - specpdl;
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ Fset_buffer (build_string ("*Buffer List*"));
+ SET_PT (XINT (desired_point));
+ return unbind_to (count, Qnil);
+ }
return Qnil;
}
Every function to select a new major mode starts by\n\
calling this function.\n\n\
As a special exception, local variables whose names have\n\
-a non-nil `permanent-local' property are not eliminated by this function.")
+a non-nil `permanent-local' property are not eliminated by this function.\n\
+\n\
+The first thing this function does is run\n\
+the normal hook `change-major-mode-hook'.")
()
{
register Lisp_Object alist, sym, tem;
Lisp_Object oalist;
+
+ if (!NILP (Vrun_hooks))
+ call1 (Vrun_hooks, intern ("change-major-mode-hook"));
oalist = current_buffer->local_var_alist;
/* Make sure no local variables remain set up with this buffer
it is currently set up for. This is so that, if the
local is marked permanent, and we make it local again below,
we don't lose the value. */
- XCONS (XCONS (tem)->car)->cdr = XCONS (XSYMBOL (sym)->value)->car;
+ XCONS (XCONS (tem)->car)->cdr
+ = do_symval_forwarding (XCONS (XSYMBOL (sym)->value)->car);
/* Switch to the symbol's default-value alist entry. */
XCONS (tem)->car = tem;
/* Mark it as current for the current buffer. */
/* Find all the overlays in the current buffer that contain position POS.
Return the number found, and store them in a vector in *VEC_PTR.
Store in *LEN_PTR the size allocated for the vector.
- Store in *NEXT_PTR the next position after POS where an overlay starts.
+ Store in *NEXT_PTR the next position after POS where an overlay starts,
+ or ZV if there are no more overlays.
*VEC_PTR and *LEN_PTR should contain a valid vector and size
- when this function is called. */
+ when this function is called.
+
+ If EXTEND is non-zero, we make the vector bigger if necessary.
+ If EXTEND is zero, we never extend the vector,
+ and we store only as many overlays as will fit.
+ But we still return the total number of overlays. */
int
-overlays_at (pos, vec_ptr, len_ptr, next_ptr)
+overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr)
int pos;
+ int extend;
Lisp_Object **vec_ptr;
int *len_ptr;
int *next_ptr;
int len = *len_ptr;
Lisp_Object *vec = *vec_ptr;
int next = ZV;
- int startpos;
+ int inhibit_storing = 0;
for (tail = current_buffer->overlays_before;
- CONSP (tail);
+ XGCTYPE (tail) == Lisp_Cons;
tail = XCONS (tail)->cdr)
{
+ int startpos;
+
overlay = XCONS (tail)->car;
- if (! OVERLAY_VALID (overlay))
- continue;
+ if (XGCTYPE (overlay) != Lisp_Overlay)
+ abort ();
start = OVERLAY_START (overlay);
end = OVERLAY_END (overlay);
{
if (idx == len)
{
- *len_ptr = len *= 2;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
- *vec_ptr = vec;
+ /* The supplied vector is full.
+ Either make it bigger, or don't store any more in it. */
+ if (extend)
+ {
+ *len_ptr = len *= 2;
+ vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ *vec_ptr = vec;
+ }
+ else
+ inhibit_storing = 1;
}
- vec[idx++] = overlay;
+
+ if (!inhibit_storing)
+ vec[idx] = overlay;
+ /* Keep counting overlays even if we can't return them all. */
+ idx++;
}
else if (startpos < next)
next = startpos;
}
for (tail = current_buffer->overlays_after;
- CONSP (tail);
+ XGCTYPE (tail) == Lisp_Cons;
tail = XCONS (tail)->cdr)
{
+ int startpos;
+
overlay = XCONS (tail)->car;
- if (! OVERLAY_VALID (overlay))
- continue;
+ if (XGCTYPE (overlay) != Lisp_Overlay)
+ abort ();
start = OVERLAY_START (overlay);
end = OVERLAY_END (overlay);
startpos = OVERLAY_POSITION (start);
- if (startpos > pos)
+ if (pos < startpos)
{
if (startpos < next)
next = startpos;
break;
}
- if (OVERLAY_POSITION (end) > pos)
+ if (pos < OVERLAY_POSITION (end))
{
if (idx == len)
{
- *len_ptr = len *= 2;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
- *vec_ptr = vec;
+ if (extend)
+ {
+ *len_ptr = len *= 2;
+ vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ *vec_ptr = vec;
+ }
+ else
+ inhibit_storing = 1;
}
- vec[idx++] = overlay;
+
+ if (!inhibit_storing)
+ vec[idx] = overlay;
+ idx++;
}
}
return idx;
}
\f
-/* Shift overlays in the current buffer's overlay lists,
- to center the lists at POS. */
+struct sortvec
+{
+ Lisp_Object overlay;
+ int beg, end;
+ int priority;
+};
+
+static int
+compare_overlays (s1, s2)
+ struct sortvec *s1, *s2;
+{
+ if (s1->priority != s2->priority)
+ return s1->priority - s2->priority;
+ if (s1->beg != s2->beg)
+ return s1->beg - s2->beg;
+ if (s1->end != s2->end)
+ return s2->end - s1->end;
+ return 0;
+}
+
+/* Sort an array of overlays by priority. The array is modified in place.
+ The return value is the new size; this may be smaller than the original
+ size if some of the overlays were invalid or were window-specific. */
+int
+sort_overlays (overlay_vec, noverlays, w)
+ Lisp_Object *overlay_vec;
+ int noverlays;
+ struct window *w;
+{
+ int i, j;
+ struct sortvec *sortvec;
+ sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec));
+
+ /* Put the valid and relevant overlays into sortvec. */
+
+ for (i = 0, j = 0; i < noverlays; i++)
+ {
+ Lisp_Object tem;
+ Lisp_Object overlay;
+
+ overlay = overlay_vec[i];
+ if (OVERLAY_VALID (overlay)
+ && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0
+ && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0)
+ {
+ /* If we're interested in a specific window, then ignore
+ overlays that are limited to some other window. */
+ if (w)
+ {
+ Lisp_Object window;
+
+ window = Foverlay_get (overlay, Qwindow);
+ if (XTYPE (window) == Lisp_Window && XWINDOW (window) != w)
+ continue;
+ }
+
+ /* This overlay is good and counts: put it into sortvec. */
+ sortvec[j].overlay = overlay;
+ sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay));
+ sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay));
+ tem = Foverlay_get (overlay, Qpriority);
+ if (INTEGERP (tem))
+ sortvec[j].priority = XINT (tem);
+ else
+ sortvec[j].priority = 0;
+ j++;
+ }
+ }
+ noverlays = j;
+
+ /* Sort the overlays into the proper order: increasing priority. */
+
+ if (noverlays > 1)
+ qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays);
+
+ for (i = 0; i < noverlays; i++)
+ overlay_vec[i] = sortvec[i].overlay;
+ return (noverlays);
+}
+\f
+/* Shift overlays in BUF's overlay lists, to center the lists at POS. */
void
-recenter_overlay_lists (pos)
+recenter_overlay_lists (buf, pos)
+ struct buffer *buf;
int pos;
{
Lisp_Object overlay, tail, next, prev, beg, end;
But we use it for symmetry and in case that should cease to be true
with some future change. */
prev = Qnil;
- for (tail = current_buffer->overlays_before;
+ for (tail = buf->overlays_before;
CONSP (tail);
prev = tail, tail = next)
{
/* If the overlay is not valid, get rid of it. */
if (!OVERLAY_VALID (overlay))
+#if 1
+ abort ();
+#else
{
/* Splice the cons cell TAIL out of overlays_before. */
if (!NILP (prev))
XCONS (prev)->cdr = next;
else
- current_buffer->overlays_before = next;
+ buf->overlays_before = next;
tail = prev;
continue;
}
+#endif
beg = OVERLAY_START (overlay);
end = OVERLAY_END (overlay);
if (!NILP (prev))
XCONS (prev)->cdr = next;
else
- current_buffer->overlays_before = next;
+ buf->overlays_before = next;
/* Search thru overlays_after for where to put it. */
other_prev = Qnil;
- for (other = current_buffer->overlays_after;
+ for (other = buf->overlays_after;
CONSP (other);
other_prev = other, other = XCONS (other)->cdr)
{
otheroverlay = XCONS (other)->car;
if (! OVERLAY_VALID (otheroverlay))
- continue;
+ abort ();
otherbeg = OVERLAY_START (otheroverlay);
if (OVERLAY_POSITION (otherbeg) >= where)
if (!NILP (other_prev))
XCONS (other_prev)->cdr = tail;
else
- current_buffer->overlays_after = tail;
+ buf->overlays_after = tail;
tail = prev;
}
else
/* See if anything in overlays_after should be in overlays_before. */
prev = Qnil;
- for (tail = current_buffer->overlays_after;
+ for (tail = buf->overlays_after;
CONSP (tail);
prev = tail, tail = next)
{
/* If the overlay is not valid, get rid of it. */
if (!OVERLAY_VALID (overlay))
+#if 1
+ abort ();
+#else
{
/* Splice the cons cell TAIL out of overlays_after. */
if (!NILP (prev))
XCONS (prev)->cdr = next;
else
- current_buffer->overlays_after = next;
+ buf->overlays_after = next;
tail = prev;
continue;
}
+#endif
beg = OVERLAY_START (overlay);
end = OVERLAY_END (overlay);
if (!NILP (prev))
XCONS (prev)->cdr = next;
else
- current_buffer->overlays_after = next;
+ buf->overlays_after = next;
/* Search thru overlays_before for where to put it. */
other_prev = Qnil;
- for (other = current_buffer->overlays_before;
+ for (other = buf->overlays_before;
CONSP (other);
other_prev = other, other = XCONS (other)->cdr)
{
otheroverlay = XCONS (other)->car;
if (! OVERLAY_VALID (otheroverlay))
- continue;
+ abort ();
otherend = OVERLAY_END (otheroverlay);
if (OVERLAY_POSITION (otherend) <= where)
if (!NILP (other_prev))
XCONS (other_prev)->cdr = tail;
else
- current_buffer->overlays_before = tail;
+ buf->overlays_before = tail;
tail = prev;
}
}
- XFASTINT (current_buffer->overlay_center) = pos;
+ XFASTINT (buf->overlay_center) = pos;
+}
+
+/* Fix up overlays that were garbled as a result of permuting markers
+ in the range START through END. Any overlay with at least one
+ endpoint in this range will need to be unlinked from the overlay
+ list and reinserted in its proper place.
+ Such an overlay might even have negative size at this point.
+ If so, we'll reverse the endpoints. Can you think of anything
+ better to do in this situation? */
+void
+fix_overlays_in_range (start, end)
+ register int start, end;
+{
+ Lisp_Object tem, overlay;
+ Lisp_Object before_list, after_list;
+ Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list;
+ int startpos, endpos;
+
+ /* This algorithm shifts links around instead of consing and GCing.
+ The loop invariant is that before_list (resp. after_list) is a
+ well-formed list except that its last element, the one that
+ *pbefore (resp. *pafter) points to, is still uninitialized.
+ So it's not a bug that before_list isn't initialized, although
+ it may look strange. */
+ for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);)
+ {
+ overlay = XCONS (*ptail)->car;
+ endpos = OVERLAY_POSITION (OVERLAY_END (overlay));
+ if (endpos < start)
+ break;
+ startpos = OVERLAY_POSITION (OVERLAY_START (overlay));
+ if (endpos < end
+ || (startpos >= start && startpos < end))
+ {
+ /* If the overlay is backwards, fix that now. */
+ if (startpos > endpos)
+ {
+ int tem;
+ Fset_marker (OVERLAY_START (overlay), endpos, Qnil);
+ Fset_marker (OVERLAY_END (overlay), startpos, Qnil);
+ tem = startpos; startpos = endpos; endpos = tem;
+ }
+ /* Add it to the end of the wrong list. Later on,
+ recenter_overlay_lists will move it to the right place. */
+ if (endpos < XINT (current_buffer->overlay_center))
+ {
+ *pafter = *ptail;
+ pafter = &XCONS (*ptail)->cdr;
+ }
+ else
+ {
+ *pbefore = *ptail;
+ pbefore = &XCONS (*ptail)->cdr;
+ }
+ *ptail = XCONS (*ptail)->cdr;
+ }
+ else
+ ptail = &XCONS (*ptail)->cdr;
+ }
+ for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);)
+ {
+ overlay = XCONS (*ptail)->car;
+ startpos = OVERLAY_POSITION (OVERLAY_START (overlay));
+ if (startpos >= end)
+ break;
+ endpos = OVERLAY_POSITION (OVERLAY_END (overlay));
+ if (startpos >= start
+ || (endpos >= start && endpos < end))
+ {
+ if (startpos > endpos)
+ {
+ int tem;
+ Fset_marker (OVERLAY_START (overlay), endpos, Qnil);
+ Fset_marker (OVERLAY_END (overlay), startpos, Qnil);
+ tem = startpos; startpos = endpos; endpos = tem;
+ }
+ if (endpos < XINT (current_buffer->overlay_center))
+ {
+ *pafter = *ptail;
+ pafter = &XCONS (*ptail)->cdr;
+ }
+ else
+ {
+ *pbefore = *ptail;
+ pbefore = &XCONS (*ptail)->cdr;
+ }
+ *ptail = XCONS (*ptail)->cdr;
+ }
+ else
+ ptail = &XCONS (*ptail)->cdr;
+ }
+
+ /* Splice the constructed (wrong) lists into the buffer's lists,
+ and let the recenter function make it sane again. */
+ *pbefore = current_buffer->overlays_before;
+ current_buffer->overlays_before = before_list;
+ recenter_overlay_lists (current_buffer,
+ XINT (current_buffer->overlay_center));
+
+ *pafter = current_buffer->overlays_after;
+ current_buffer->overlays_after = after_list;
+ recenter_overlay_lists (current_buffer,
+ XINT (current_buffer->overlay_center));
}
\f
-DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 2, 0,
- "Create a new overlay in the current buffer, with range BEG to END.\n\
+DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0,
+ "Return t if OBJECT is an overlay.")
+ (object)
+ Lisp_Object object;
+{
+ return (OVERLAYP (object) ? Qt : Qnil);
+}
+
+DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 3, 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)
- Lisp_Object beg, end;
+ (beg, end, buffer)
+ Lisp_Object beg, end, buffer;
{
Lisp_Object overlay;
+ struct buffer *b;
- if (MARKERP (beg) && XBUFFER (Fmarker_buffer (beg)) != current_buffer)
+ if (NILP (buffer))
+ XSET (buffer, Lisp_Buffer, current_buffer);
+ else
+ CHECK_BUFFER (buffer, 2);
+ if (MARKERP (beg)
+ && ! EQ (Fmarker_buffer (beg), buffer))
error ("Marker points into wrong buffer");
- if (MARKERP (end) && XBUFFER (Fmarker_buffer (end)) != current_buffer)
+ if (MARKERP (end)
+ && ! EQ (Fmarker_buffer (end), buffer))
error ("Marker points into wrong buffer");
- overlay = Fcons (Fcons (Fcopy_marker (beg), Fcopy_marker (end)), Qnil);
+ CHECK_NUMBER_COERCE_MARKER (beg, 1);
+ CHECK_NUMBER_COERCE_MARKER (end, 1);
+
+ if (XINT (beg) > XINT (end))
+ {
+ Lisp_Object temp;
+ temp = beg; beg = end; end = temp;
+ }
+
+ b = XBUFFER (buffer);
+
+ beg = Fset_marker (Fmake_marker (), beg, buffer);
+ end = Fset_marker (Fmake_marker (), end, buffer);
+
+ overlay = Fcons (Fcons (beg, end), Qnil);
+ XSETTYPE (overlay, Lisp_Overlay);
/* Put the new overlay on the wrong list. */
end = OVERLAY_END (overlay);
- if (OVERLAY_POSITION (end) < XINT (current_buffer->overlay_center))
- current_buffer->overlays_after
- = Fcons (overlay, current_buffer->overlays_after);
+ if (OVERLAY_POSITION (end) < XINT (b->overlay_center))
+ b->overlays_after = Fcons (overlay, b->overlays_after);
else
- current_buffer->overlays_before
- = Fcons (overlay, current_buffer->overlays_before);
+ b->overlays_before = Fcons (overlay, b->overlays_before);
/* This puts it in the right list, and in the right order. */
- recenter_overlay_lists (XINT (current_buffer->overlay_center));
+ recenter_overlay_lists (b, XINT (b->overlay_center));
+
+ /* We don't need to redisplay the region covered by the overlay, because
+ the overlay has no properties at the moment. */
return overlay;
}
-DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 3, 0,
- "Set the endpoints of OVERLAY to BEG and END.")
- (overlay, beg, end)
- Lisp_Object overlay, beg, end;
+DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0,
+ "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
+If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
+If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
+buffer.")
+ (overlay, beg, end, buffer)
+ Lisp_Object overlay, beg, end, buffer;
{
- if (!OVERLAY_VALID (overlay))
- error ("Invalid overlay object");
+ struct buffer *b, *ob;
+ Lisp_Object obuffer;
+ int count = specpdl_ptr - specpdl;
+
+ CHECK_OVERLAY (overlay, 0);
+ if (NILP (buffer))
+ buffer = Fmarker_buffer (OVERLAY_START (overlay));
+ if (NILP (buffer))
+ XSET (buffer, Lisp_Buffer, current_buffer);
+ CHECK_BUFFER (buffer, 3);
+
+ if (MARKERP (beg)
+ && ! EQ (Fmarker_buffer (beg), buffer))
+ error ("Marker points into wrong buffer");
+ if (MARKERP (end)
+ && ! EQ (Fmarker_buffer (end), buffer))
+ error ("Marker points into wrong buffer");
+
+ CHECK_NUMBER_COERCE_MARKER (beg, 1);
+ CHECK_NUMBER_COERCE_MARKER (end, 1);
+
+ if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate)))
+ return Fdelete_overlay (overlay);
+
+ if (XINT (beg) > XINT (end))
+ {
+ Lisp_Object temp;
+ temp = beg; beg = end; end = temp;
+ }
- current_buffer->overlays_before
- = Fdelq (overlay, current_buffer->overlays_before);
- current_buffer->overlays_after
- = Fdelq (overlay, current_buffer->overlays_after);
+ specbind (Qinhibit_quit, Qt);
- Fset_marker (OVERLAY_START (overlay), beg, Qnil);
- Fset_marker (OVERLAY_END (overlay), end, Qnil);
+ obuffer = Fmarker_buffer (OVERLAY_START (overlay));
+ b = XBUFFER (buffer);
+ ob = XBUFFER (obuffer);
+
+ /* If the overlay has changed buffers, do a thorough redisplay. */
+ if (!EQ (buffer, obuffer))
+ {
+ /* Redisplay where the overlay was. */
+ if (!NILP (obuffer))
+ {
+ Lisp_Object o_beg;
+ Lisp_Object o_end;
+
+ o_beg = OVERLAY_START (overlay);
+ o_end = OVERLAY_END (overlay);
+ o_beg = OVERLAY_POSITION (o_beg);
+ o_end = OVERLAY_POSITION (o_end);
+
+ redisplay_region (ob, XINT (o_beg), XINT (o_end));
+ }
+
+ /* Redisplay where the overlay is going to be. */
+ redisplay_region (b, XINT (beg), XINT (end));
+
+ /* Don't limit redisplay to the selected window. */
+ windows_or_buffers_changed = 1;
+ }
+ else
+ /* Redisplay the area the overlay has just left, or just enclosed. */
+ {
+ Lisp_Object o_beg;
+ Lisp_Object 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);
+
+ 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));
+ 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 (!NILP (obuffer))
+ {
+ ob->overlays_before = Fdelq (overlay, ob->overlays_before);
+ ob->overlays_after = Fdelq (overlay, ob->overlays_after);
+ }
+
+ Fset_marker (OVERLAY_START (overlay), beg, buffer);
+ Fset_marker (OVERLAY_END (overlay), end, buffer);
/* Put the overlay on the wrong list. */
end = OVERLAY_END (overlay);
- if (OVERLAY_POSITION (end) < XINT (current_buffer->overlay_center))
- current_buffer->overlays_after
- = Fcons (overlay, current_buffer->overlays_after);
+ if (OVERLAY_POSITION (end) < XINT (b->overlay_center))
+ b->overlays_after = Fcons (overlay, b->overlays_after);
else
- current_buffer->overlays_before
- = Fcons (overlay, current_buffer->overlays_before);
+ b->overlays_before = Fcons (overlay, b->overlays_before);
/* This puts it in the right list, and in the right order. */
- recenter_overlay_lists (XINT (current_buffer->overlay_center));
+ recenter_overlay_lists (b, XINT (b->overlay_center));
- return overlay;
+ return unbind_to (count, overlay);
}
DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0,
- "Delete the overlay OVERLAY from the current buffer.")
+ "Delete the overlay OVERLAY from its buffer.")
(overlay)
+ Lisp_Object overlay;
{
- current_buffer->overlays_before
- = Fdelq (overlay, current_buffer->overlays_before);
- current_buffer->overlays_after
- = Fdelq (overlay, current_buffer->overlays_after);
- return Qnil;
+ Lisp_Object buffer;
+ struct buffer *b;
+ int count = specpdl_ptr - specpdl;
+
+ CHECK_OVERLAY (overlay, 0);
+
+ buffer = Fmarker_buffer (OVERLAY_START (overlay));
+ if (NILP (buffer))
+ return Qnil;
+
+ b = XBUFFER (buffer);
+
+ specbind (Qinhibit_quit, Qt);
+
+ b->overlays_before = Fdelq (overlay, b->overlays_before);
+ b->overlays_after = Fdelq (overlay, b->overlays_after);
+
+ redisplay_region (b,
+ marker_position (OVERLAY_START (overlay)),
+ marker_position (OVERLAY_END (overlay)));
+
+ Fset_marker (OVERLAY_START (overlay), Qnil, Qnil);
+ Fset_marker (OVERLAY_END (overlay), Qnil, Qnil);
+
+ return unbind_to (count, Qnil);
}
\f
+/* Overlay dissection functions. */
+
+DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0,
+ "Return the position at which OVERLAY starts.")
+ (overlay)
+ Lisp_Object overlay;
+{
+ CHECK_OVERLAY (overlay, 0);
+
+ return (Fmarker_position (OVERLAY_START (overlay)));
+}
+
+DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0,
+ "Return the position at which OVERLAY ends.")
+ (overlay)
+ Lisp_Object overlay;
+{
+ CHECK_OVERLAY (overlay, 0);
+
+ return (Fmarker_position (OVERLAY_END (overlay)));
+}
+
+DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0,
+ "Return the buffer OVERLAY belongs to.")
+ (overlay)
+ Lisp_Object overlay;
+{
+ CHECK_OVERLAY (overlay, 0);
+
+ return Fmarker_buffer (OVERLAY_START (overlay));
+}
+
+DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0,
+ "Return a list of the properties on OVERLAY.\n\
+This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
+OVERLAY.")
+ (overlay)
+ Lisp_Object overlay;
+{
+ CHECK_OVERLAY (overlay, 0);
+
+ return Fcopy_sequence (Fcdr_safe (XCONS (overlay)->cdr));
+}
+
+\f
DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0,
- "Return a list of the overays that contain position POS.")
+ "Return a list of the overlays that contain position POS.")
(pos)
Lisp_Object pos;
{
/* Put all the overlays we want in a vector in overlay_vec.
Store the length in len. */
- noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos);
+ noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos);
/* Make a list of them all. */
result = Flist (noverlays, overlay_vec);
DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change,
1, 1, 0,
- "Return the next position after POS where an overlay starts or ends.")
+ "Return the next position after POS where an overlay starts or ends.\n\
+If there are no more overlay boundaries after POS, return (point-max).")
(pos)
Lisp_Object pos;
{
/* Put all the overlays we want in a vector in overlay_vec.
Store the length in len.
endpos gets the position where the next overlay starts. */
- noverlays = overlays_at (XINT (pos), &overlay_vec, &len, &endpos);
+ noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, &endpos);
/* If any of these overlays ends before endpos,
use its ending point instead. */
DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0,
"Return a pair of lists giving all the overlays of the current buffer.\n\
The car has all the overlays before the overlay center;\n\
-the cdr has all the overlays before the overlay center.\n\
+the cdr has all the overlays after the overlay center.\n\
Recentering overlays moves overlays between these lists.\n\
The lists you get are copies, so that changing them has no effect.\n\
However, the overlays you get are the real objects that the buffer uses.")
{
CHECK_NUMBER_COERCE_MARKER (pos, 0);
- recenter_overlay_lists (XINT (pos));
+ recenter_overlay_lists (current_buffer, XINT (pos));
return Qnil;
}
\f
Lisp_Object overlay, prop;
{
Lisp_Object plist;
- for (plist = Fcdr_safe (Fcdr_safe (overlay));
+
+ CHECK_OVERLAY (overlay, 0);
+
+ for (plist = Fcdr_safe (XCONS (overlay)->cdr);
CONSP (plist) && CONSP (XCONS (plist)->cdr);
plist = XCONS (XCONS (plist)->cdr)->cdr)
{
if (EQ (XCONS (plist)->car, prop))
return XCONS (XCONS (plist)->cdr)->car;
}
+
+ return Qnil;
}
DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0,
(overlay, prop, value)
Lisp_Object overlay, prop, value;
{
- Lisp_Object plist, tail;
+ Lisp_Object plist, tail, buffer;
+ int changed;
+
+ CHECK_OVERLAY (overlay, 0);
- plist = Fcdr_safe (Fcdr_safe (overlay));
+ buffer = Fmarker_buffer (OVERLAY_START (overlay));
+
+ plist = Fcdr_safe (XCONS (overlay)->cdr);
for (tail = plist;
CONSP (tail) && CONSP (XCONS (tail)->cdr);
tail = XCONS (XCONS (tail)->cdr)->cdr)
+ if (EQ (XCONS (tail)->car, prop))
+ {
+ changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value);
+ XCONS (XCONS (tail)->cdr)->car = value;
+ goto found;
+ }
+ /* It wasn't in the list, so add it to the front. */
+ changed = !NILP (value);
+ if (! CONSP (XCONS (overlay)->cdr))
+ XCONS (overlay)->cdr = Fcons (Qnil, Qnil);
+ XCONS (XCONS (overlay)->cdr)->cdr = Fcons (prop, Fcons (value, plist));
+ found:
+ if (! NILP (buffer))
{
- if (EQ (XCONS (tail)->car, prop))
- return XCONS (XCONS (tail)->cdr)->car = value;
+ if (changed)
+ redisplay_region (XBUFFER (buffer),
+ marker_position (OVERLAY_START (overlay)),
+ marker_position (OVERLAY_END (overlay)));
+ if (EQ (prop, Qevaporate) && ! NILP (value)
+ && (OVERLAY_POSITION (OVERLAY_START (overlay))
+ == OVERLAY_POSITION (OVERLAY_END (overlay))))
+ Fdelete_overlay (overlay);
}
+ return value;
+}
+\f
+/* Run the modification-hooks of overlays that include
+ any part of the text in START to END.
+ Run the insert-before-hooks of overlay starting at END,
+ and the insert-after-hooks of overlay ending at START. */
- if (! CONSP (XCONS (overlay)->cdr))
- XCONS (overlay)->cdr = Fcons (Qnil, Qnil);
+void
+verify_overlay_modification (start, end)
+ Lisp_Object start, end;
+{
+ Lisp_Object prop, overlay, tail;
+ int insertion = EQ (start, end);
+ int tail_copied;
+ struct gcpro gcpro1, gcpro2;
- XCONS (XCONS (overlay)->cdr)->cdr
- = Fcons (prop, Fcons (value, plist));
+ overlay = Qnil;
+ tail = Qnil;
+ GCPRO2 (overlay, tail);
- return value;
+ tail_copied = 0;
+ for (tail = current_buffer->overlays_before;
+ CONSP (tail);
+ tail = XCONS (tail)->cdr)
+ {
+ int startpos, endpos;
+ Lisp_Object ostart, oend;
+
+ overlay = XCONS (tail)->car;
+
+ ostart = OVERLAY_START (overlay);
+ oend = OVERLAY_END (overlay);
+ endpos = OVERLAY_POSITION (oend);
+ if (XFASTINT (start) > endpos)
+ break;
+ startpos = OVERLAY_POSITION (ostart);
+ if (XFASTINT (end) == startpos && insertion)
+ {
+ prop = Foverlay_get (overlay, Qinsert_in_front_hooks);
+ if (!NILP (prop))
+ {
+ /* Copy TAIL in case the hook recenters the overlay lists. */
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ if (XFASTINT (start) == endpos && insertion)
+ {
+ prop = Foverlay_get (overlay, Qinsert_behind_hooks);
+ if (!NILP (prop))
+ {
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ /* Test for intersecting intervals. This does the right thing
+ for both insertion and deletion. */
+ if (XFASTINT (end) > startpos && XFASTINT (start) < endpos)
+ {
+ prop = Foverlay_get (overlay, Qmodification_hooks);
+ if (!NILP (prop))
+ {
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ }
+
+ tail_copied = 0;
+ for (tail = current_buffer->overlays_after;
+ CONSP (tail);
+ tail = XCONS (tail)->cdr)
+ {
+ int startpos, endpos;
+ Lisp_Object ostart, oend;
+
+ overlay = XCONS (tail)->car;
+
+ ostart = OVERLAY_START (overlay);
+ oend = OVERLAY_END (overlay);
+ startpos = OVERLAY_POSITION (ostart);
+ endpos = OVERLAY_POSITION (oend);
+ if (XFASTINT (end) < startpos)
+ break;
+ if (XFASTINT (end) == startpos && insertion)
+ {
+ prop = Foverlay_get (overlay, Qinsert_in_front_hooks);
+ if (!NILP (prop))
+ {
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ if (XFASTINT (start) == endpos && insertion)
+ {
+ prop = Foverlay_get (overlay, Qinsert_behind_hooks);
+ if (!NILP (prop))
+ {
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ /* Test for intersecting intervals. This does the right thing
+ for both insertion and deletion. */
+ if (XFASTINT (end) > startpos && XFASTINT (start) < endpos)
+ {
+ prop = Foverlay_get (overlay, Qmodification_hooks);
+ if (!NILP (prop))
+ {
+ if (!tail_copied)
+ tail = Fcopy_sequence (tail);
+ tail_copied = 1;
+ call_overlay_mod_hooks (prop, overlay, start, end);
+ }
+ }
+ }
+
+ UNGCPRO;
+}
+
+static void
+call_overlay_mod_hooks (list, overlay, start, end)
+ Lisp_Object list, overlay, start, end;
+{
+ struct gcpro gcpro1;
+ GCPRO1 (list);
+ while (!NILP (list))
+ {
+ call3 (Fcar (list), overlay, start, end);
+ list = Fcdr (list);
+ }
+ UNGCPRO;
+}
+
+/* Delete any zero-sized overlays at position POS, if the `evaporate'
+ property is set. */
+void
+evaporate_overlays (pos)
+ int pos;
+{
+ Lisp_Object tail, overlay, hit_list;
+
+ hit_list = Qnil;
+ if (pos <= XFASTINT (current_buffer->overlay_center))
+ for (tail = current_buffer->overlays_before; CONSP (tail);
+ tail = XCONS (tail)->cdr)
+ {
+ int endpos;
+ overlay = XCONS (tail)->car;
+ endpos = OVERLAY_POSITION (OVERLAY_END (overlay));
+ if (endpos < pos)
+ break;
+ if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos
+ && Foverlay_get (overlay, Qevaporate))
+ hit_list = Fcons (overlay, hit_list);
+ }
+ else
+ for (tail = current_buffer->overlays_after; CONSP (tail);
+ tail = XCONS (tail)->cdr)
+ {
+ int startpos;
+ overlay = XCONS (tail)->cdr;
+ startpos = OVERLAY_POSITION (OVERLAY_START (overlay));
+ if (startpos > pos)
+ break;
+ if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos
+ && Foverlay_get (overlay, Qevaporate))
+ hit_list = Fcons (overlay, hit_list);
+ }
+ for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr)
+ Fdelete_overlay (XCONS (hit_list)->car);
}
\f
/* Somebody has tried to store NEWVAL into the buffer-local slot with
/* 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 (&buffer_local_symbols);
+ reset_buffer_local_variables (&buffer_local_symbols);
XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults);
XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols);
buffer_defaults.truncate_lines = Qnil;
buffer_defaults.ctl_arrow = Qt;
+#ifdef MSDOS
+ buffer_defaults.buffer_file_type = Qnil; /* TEXT */
+#endif
XFASTINT (buffer_defaults.fill_column) = 70;
XFASTINT (buffer_defaults.left_margin) = 0;
The local flag bits are in the local_var_flags slot of the buffer. */
/* Nothing can work if this isn't true */
- if (sizeof (int) != sizeof (Lisp_Object)) abort ();
+ if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort ();
/* 0 means not a lisp var, -1 means always local, else mask */
bzero (&buffer_local_flags, sizeof buffer_local_flags);
XFASTINT (buffer_local_flags.abbrev_table) = 0x1000;
XFASTINT (buffer_local_flags.display_table) = 0x2000;
XFASTINT (buffer_local_flags.syntax_table) = 0x8000;
+#ifdef MSDOS
+ XFASTINT (buffer_local_flags.buffer_file_type) = 0x4000;
+#endif
Vbuffer_alist = Qnil;
current_buffer = 0;
char buf[MAXPATHLEN+1];
char *pwd;
struct stat dotstat, pwdstat;
+ Lisp_Object temp;
Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
strcat (buf, "/");
#endif /* not VMS */
current_buffer->directory = build_string (buf);
+
+ temp = get_minibuffer (0);
+ XBUFFER (temp)->directory = current_buffer->directory;
}
/* initialize the buffer routines */
staticpro (&Qprotected_field);
staticpro (&Qpermanent_local);
staticpro (&Qkill_buffer_hook);
+ staticpro (&Qoverlayp);
+ Qevaporate = intern ("evaporate");
+ staticpro (&Qevaporate);
+ staticpro (&Qmodification_hooks);
+ Qmodification_hooks = intern ("modification-hooks");
+ staticpro (&Qinsert_in_front_hooks);
+ Qinsert_in_front_hooks = intern ("insert-in-front-hooks");
+ staticpro (&Qinsert_behind_hooks);
+ Qinsert_behind_hooks = intern ("insert-behind-hooks");
+ staticpro (&Qget_file_buffer);
+ Qget_file_buffer = intern ("get-file-buffer");
+ Qpriority = intern ("priority");
+ staticpro (&Qpriority);
+ Qwindow = intern ("window");
+ staticpro (&Qwindow);
+
+ Qoverlayp = intern ("overlayp");
Fput (Qprotected_field, Qerror_conditions,
Fcons (Qprotected_field, Fcons (Qerror, Qnil)));
Fput (Qprotected_field, Qerror_message,
build_string ("Attempt to modify a protected field"));
- Fput (intern ("erase-buffer"), Qdisabled, Qt);
-
/* All these use DEFVAR_LISP_NOPRO because the slots in
buffer_defaults will all be marked via Vbuffer_defaults. */
"Default value of `case-fold-search' for buffers that don't override it.\n\
This is the same as (default-value 'case-fold-search).");
+#ifdef MSDOS
+ DEFVAR_LISP_NOPRO ("default-buffer-file-type",
+ &buffer_defaults.buffer_file_type,
+ "Default file type for buffers that do not override it.\n\
+This is the same as (default-value 'buffer-file-type).\n\
+The file type is nil for text, t for binary.");
+#endif
+
DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
Qnil, 0);
(%-constructs are allowed when the string is the entire mode-line-format\n\
or when it is found in a cons-cell or a list)\n\
%b -- print buffer name. %f -- print visited file name.\n\
- %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\
- %s -- print process status. %M -- print value of global-mode-string. (obs)\n\
- %p -- print percent of buffer above top of window, or top, bot or all.\n\
+ %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\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\
+ %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\
%[ -- 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.");
`truncate-partial-width-windows' if that variable is non-nil\n\
and this buffer is not full-frame width.");
+#ifdef MSDOS
+ DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type,
+ Qnil,
+ "*If visited file is text, nil; otherwise, t.");
+#endif
+
DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory,
make_number (Lisp_String),
"Name of default directory of current buffer. Should end with slash.\n\
If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
Automatically becomes buffer-local when set in any fashion.");
+#if 0 /* The doc string is too long for some compilers,
+ but make-docfile can find it in this comment. */
DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table,
Qnil,
"Display table that controls display of the contents of current buffer.\n\
Automatically becomes buffer-local when set in any fashion.\n\
The display table is a vector created with `make-display-table'.\n\
The first 256 elements control how to display each possible text character.\n\
-The value should be a \"rope\" (see `make-rope') or nil;\n\
+Each value should be a vector of characters or nil;\n\
nil means display the character in the default fashion.\n\
-The remaining five elements are ropes that control the display of\n\
- the end of a truncated screen line (element 256);\n\
- the end of a continued line (element 257);\n\
- the escape character used to display character codes in octal (element 258);\n\
- the character used as an arrow for control characters (element 259);\n\
- the decoration indicating the presence of invisible lines (element 260).\n\
+The remaining six elements control the display of\n\
+ the end of a truncated screen line (element 256, a single character);\n\
+ the end of a continued line (element 257, a single character);\n\
+ the escape character used to display character codes in octal\n\
+ (element 258, a single character);\n\
+ the character used as an arrow for control characters (element 259,\n\
+ a single character);\n\
+ the decoration indicating the presence of invisible lines (element 260,\n\
+ a vector of characters);\n\
+ the character used to draw the border between side-by-side windows\n\
+ (element 261, a single character).;\n\
If this variable is nil, the value of `standard-display-table' is used.\n\
Each window can have its own, overriding display table.");
+#endif
+ DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table,
+ Qnil, 0);
/*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
"Don't ask.");
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\
No information is given about the length of the text after the change.\n\
-position of the change\n\
\n\
-While executing the `before-change-function', changes to buffers do not\n\
-cause calls to any `before-change-function' or `after-change-function'.");
+Buffer changes made while executing the `before-change-function'\n\
+don't call any before-change or after-change functions.\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.");
Vbefore_change_function = Qnil;
DEFVAR_LISP ("after-change-function", &Vafter_change_function,
for a deletion, that length is the number of characters deleted,\n\
and the post-change beginning and end are at the same place.)\n\
\n\
-While executing the `after-change-function', changes to buffers do not\n\
-cause calls to any `before-change-function' or `after-change-function'.");
+Buffer changes made while executing the `after-change-function'\n\
+don't call any before-change or after-change functions.\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.");
Vafter_change_function = Qnil;
+ DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions,
+ "List of functions to call before each text change.\n\
+Two arguments are passed to each 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\
+No information is given about the length of the text after the change.\n\
+\n\
+Buffer changes made while executing the `before-change-functions'\n\
+don't call any before-change or after-change functions.\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.");
+ Vbefore_change_functions = Qnil;
+
+ DEFVAR_LISP ("after-change-functions", &Vafter_change_functions,
+ "List of function to call after each text change.\n\
+Three arguments are passed to each 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\
+\(For an insertion, the pre-change length is zero;\n\
+for a deletion, that length is the number of characters deleted,\n\
+and the post-change beginning and end are at the same place.)\n\
+\n\
+Buffer changes made while executing the `after-change-functions'\n\
+don't call any before-change or after-change functions.\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.");
+
+ Vafter_change_functions = Qnil;
+
DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook,
"A list of functions to call before changing a buffer which is unmodified.\n\
The functions are run using the `run-hooks' function.");
Qfirst_change_hook = intern ("first-change-hook");
staticpro (&Qfirst_change_hook);
+#if 0 /* The doc string is too long for some compilers,
+ but make-docfile can find it in this comment. */
DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil,
"List of undo entries in current buffer.\n\
Recent changes come first; older changes follow newer.\n\
between two undo boundaries as a single step to be undone.\n\
\n\
If the value of the variable is t, undo information is not recorded.");
+#endif
+ DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil,
+ 0);
DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil,
"Non-nil means the mark and region are currently active in this buffer.\n\
"*Non-nil means deactivate the mark when the buffer contents change.");
Vtransient_mark_mode = Qnil;
+ DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only,
+ "*Non-nil means disregard read-only status of buffers or characters.\n\
+If the value is t, disregard `buffer-read-only' and all `read-only'\n\
+text properties. If the value is a list, disregard `buffer-read-only'\n\
+and disregard a `read-only' text property if the property value\n\
+is a member of the list.");
+ Vinhibit_read_only = Qnil;
+
+ DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions,
+ "List of functions called with no args to query before killing a buffer.");
+ Vkill_buffer_query_functions = Qnil;
+
defsubr (&Sbuffer_list);
defsubr (&Sget_buffer);
defsubr (&Sget_file_buffer);
defsubr (&Slist_buffers);
defsubr (&Skill_all_local_variables);
+ defsubr (&Soverlayp);
defsubr (&Smake_overlay);
defsubr (&Sdelete_overlay);
defsubr (&Smove_overlay);
+ defsubr (&Soverlay_start);
+ defsubr (&Soverlay_end);
+ defsubr (&Soverlay_buffer);
+ defsubr (&Soverlay_properties);
defsubr (&Soverlays_at);
defsubr (&Snext_overlay_change);
defsubr (&Soverlay_recenter);
initial_define_key (control_x_map, 'b', "switch-to-buffer");
initial_define_key (control_x_map, 'k', "kill-buffer");
initial_define_key (control_x_map, Ctl ('B'), "list-buffers");
+
+ /* This must not be in syms_of_buffer, because Qdisabled is not
+ initialized when that function gets called. */
+ Fput (intern ("erase-buffer"), Qdisabled, Qt);
}
HCoop / bpt / emacs.git / blobdiff