/* Interface code for dealing with text properties.
- Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1994, 1995, 1997, 1999, 2000 Free Software Foundation, Inc.
This file is part of GNU Emacs.
necessary for the system to remain consistent. This requirement
is enforced by the subrs installing properties onto the intervals. */
-/* The rest of the file is within this conditional */
-#ifdef USE_TEXT_PROPERTIES
\f
/* Types of hooks. */
Lisp_Object Qmouse_left;
/* Visual properties text (including strings) may have. */
Lisp_Object Qforeground, Qbackground, Qfont, Qunderline, Qstipple;
-Lisp_Object Qinvisible, Qread_only, Qintangible;
+Lisp_Object Qinvisible, Qread_only, Qintangible, Qmouse_face;
/* Sticky properties */
Lisp_Object Qfront_sticky, Qrear_nonsticky;
/* If o1 is a cons whose cdr is a cons, return non-zero and set o2 to
the o1's cdr. Otherwise, return zero. This is handy for
traversing plists. */
-#define PLIST_ELT_P(o1, o2) (CONSP (o1) && ((o2)=XCONS (o1)->cdr, CONSP (o2)))
+#define PLIST_ELT_P(o1, o2) (CONSP (o1) && ((o2)=XCDR (o1), CONSP (o2)))
Lisp_Object Vinhibit_point_motion_hooks;
Lisp_Object Vdefault_text_properties;
+Lisp_Object Vtext_property_default_nonsticky;
/* verify_interval_modification saves insertion hooks here
to be run later by report_interval_modification. */
Lisp_Object interval_insert_behind_hooks;
Lisp_Object interval_insert_in_front_hooks;
+
+
+/* Signal a `text-read-only' error. This function makes it easier
+ to capture that error in GDB by putting a breakpoint on it. */
+
+static void
+text_read_only ()
+{
+ Fsignal (Qtext_read_only, Qnil);
+}
+
+
\f
/* Extract the interval at the position pointed to by BEGIN from
OBJECT, a string or buffer. Additionally, check that the positions
#define soft 0
#define hard 1
-static INTERVAL
+INTERVAL
validate_interval_range (object, begin, end, force)
Lisp_Object object, *begin, *end;
int force;
if (! (0 <= XINT (*begin) && XINT (*begin) <= XINT (*end)
&& XINT (*end) <= s->size))
args_out_of_range (*begin, *end);
- /* User-level Positions in strings start with 0,
- but the interval code always wants positions starting with 1. */
- XSETFASTINT (*begin, XFASTINT (*begin) + 1);
+ XSETFASTINT (*begin, XFASTINT (*begin));
if (begin != end)
- XSETFASTINT (*end, XFASTINT (*end) + 1);
+ XSETFASTINT (*end, XFASTINT (*end));
i = s->intervals;
if (s->size == 0)
Lisp_Object plist;
INTERVAL i;
{
- register Lisp_Object tail1, tail2, sym1, sym2;
+ register Lisp_Object tail1, tail2, sym1;
register int found;
/* Go through each element of PLIST. */
Lisp_Object value;
while (PLIST_ELT_P (plist, value))
- if (EQ (XCONS (plist)->car, prop))
- return XCONS (value)->car;
+ if (EQ (XCAR (plist), prop))
+ return XCAR (value);
else
- plist = XCONS (value)->cdr;
+ plist = XCDR (value);
return Qunbound;
}
or has a different value in PROPERTIES, make an undo record. */
for (sym = interval->plist;
PLIST_ELT_P (sym, value);
- sym = XCONS (value)->cdr)
- if (! EQ (property_value (properties, XCONS (sym)->car),
- XCONS (value)->car))
+ sym = XCDR (value))
+ if (! EQ (property_value (properties, XCAR (sym)),
+ XCAR (value)))
{
record_property_change (interval->position, LENGTH (interval),
- XCONS (sym)->car, XCONS (value)->car,
+ XCAR (sym), XCAR (value),
object);
}
make an undo record binding it to nil, so it will be removed. */
for (sym = properties;
PLIST_ELT_P (sym, value);
- sym = XCONS (value)->cdr)
- if (EQ (property_value (interval->plist, XCONS (sym)->car), Qunbound))
+ sym = XCDR (value))
+ if (EQ (property_value (interval->plist, XCAR (sym)), Qunbound))
{
record_property_change (interval->position, LENGTH (interval),
- XCONS (sym)->car, Qnil,
+ XCAR (sym), Qnil,
object);
}
}
}
#endif
\f
-/* Returns the interval of the POSITION in OBJECT.
+/* Returns the interval of POSITION in OBJECT.
POSITION is BEG-based. */
INTERVAL
if (NILP (object))
XSETBUFFER (object, current_buffer);
+ else if (EQ (object, Qt))
+ return NULL_INTERVAL;
CHECK_STRING_OR_BUFFER (object, 0);
{
register struct Lisp_String *s = XSTRING (object);
- /* We expect position to be 1-based. */
- beg = BEG;
- end = s->size + BEG;
+ beg = 0;
+ end = s->size;
i = s->intervals;
}
if (!(beg <= position && position <= end))
- args_out_of_range (position, position);
+ args_out_of_range (make_number (position), make_number (position));
if (beg == end || NULL_INTERVAL_P (i))
return NULL_INTERVAL;
\f
DEFUN ("text-properties-at", Ftext_properties_at,
Stext_properties_at, 1, 2, 0,
- "Return the list of properties held by the character at POSITION\n\
-in optional argument OBJECT, a string or buffer. If nil, OBJECT\n\
-defaults to the current buffer.\n\
+ "Return the list of properties of the character at POSITION in OBJECT.\n\
+OBJECT is the string or buffer to look for the properties in;\n\
+nil means the current buffer.\n\
If POSITION is at the end of OBJECT, the value is nil.")
(position, object)
Lisp_Object position, object;
return textget (Ftext_properties_at (position, object), prop);
}
-DEFUN ("get-char-property", Fget_char_property, Sget_char_property, 2, 3, 0,
- "Return the value of POSITION's property PROP, in OBJECT.\n\
-OBJECT is optional and defaults to the current buffer.\n\
-If POSITION is at the end of OBJECT, the value is nil.\n\
-If OBJECT is a buffer, then overlay properties are considered as well as\n\
-text properties.\n\
-If OBJECT is a window, then that window's buffer is used, but window-specific\n\
-overlays are considered only if they are associated with OBJECT.")
- (position, prop, object)
+/* Return the value of POSITION's property PROP, in OBJECT.
+ OBJECT is optional and defaults to the current buffer.
+ If OVERLAY is non-0, then in the case that the returned property is from
+ an overlay, the overlay found is returned in *OVERLAY, otherwise nil is
+ returned in *OVERLAY.
+ If POSITION is at the end of OBJECT, the value is nil.
+ If OBJECT is a buffer, then overlay properties are considered as well as
+ text properties.
+ If OBJECT is a window, then that window's buffer is used, but
+ window-specific overlays are considered only if they are associated
+ with OBJECT. */
+Lisp_Object
+get_char_property_and_overlay (position, prop, object, overlay)
Lisp_Object position, object;
register Lisp_Object prop;
+ Lisp_Object *overlay;
{
struct window *w = 0;
overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
noverlays = overlays_at (posn, 0, &overlay_vec, &len,
- &next_overlay, NULL);
+ &next_overlay, NULL, 0);
/* If there are more than 40,
make enough space for all, and try again. */
len = noverlays;
overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
noverlays = overlays_at (posn, 0, &overlay_vec, &len,
- &next_overlay, NULL);
+ &next_overlay, NULL, 0);
}
noverlays = sort_overlays (overlay_vec, noverlays, w);
{
tem = Foverlay_get (overlay_vec[noverlays], prop);
if (!NILP (tem))
- return (tem);
+ {
+ if (overlay)
+ /* Return the overlay we got the property from. */
+ *overlay = overlay_vec[noverlays];
+ return tem;
+ }
}
}
+
+ if (overlay)
+ /* Indicate that the return value is not from an overlay. */
+ *overlay = Qnil;
+
/* Not a buffer, or no appropriate overlay, so fall through to the
simpler case. */
- return (Fget_text_property (position, prop, object));
+ return Fget_text_property (position, prop, object);
+}
+
+DEFUN ("get-char-property", Fget_char_property, Sget_char_property, 2, 3, 0,
+ "Return the value of POSITION's property PROP, in OBJECT.\n\
+OBJECT is optional and defaults to the current buffer.\n\
+If POSITION is at the end of OBJECT, the value is nil.\n\
+If OBJECT is a buffer, then overlay properties are considered as well as\n\
+text properties.\n\
+If OBJECT is a window, then that window's buffer is used, but window-specific\n\
+overlays are considered only if they are associated with OBJECT.")
+ (position, prop, object)
+ Lisp_Object position, object;
+ register Lisp_Object prop;
+{
+ return get_char_property_and_overlay (position, prop, object, 0);
}
\f
DEFUN ("next-char-property-change", Fnext_char_property_change,
}
return Fprevious_property_change (position, Qnil, temp);
}
+
+
+DEFUN ("next-single-char-property-change", Fnext_single_char_property_change,
+ Snext_single_char_property_change, 2, 4, 0,
+ "Return the position of next text property or overlay change for a specific property.\n\
+Scans characters forward from POSITION till it finds\n\
+a change in the PROP property, then returns the position of the change.\n\
+The optional third argument OBJECT is the string or buffer to scan.\n\
+The property values are compared with `eq'.\n\
+Return nil if the property is constant all the way to the end of OBJECT.\n\
+If the value is non-nil, it is a position greater than POSITION, never equal.\n\n\
+If the optional fourth argument LIMIT is non-nil, don't search\n\
+past position LIMIT; return LIMIT if nothing is found before LIMIT.")
+ (position, prop, object, limit)
+ Lisp_Object prop, position, object, limit;
+{
+ if (STRINGP (object))
+ {
+ position = Fnext_single_property_change (position, prop, object, limit);
+ if (NILP (position))
+ {
+ if (NILP (limit))
+ position = make_number (XSTRING (object)->size);
+ else
+ position = limit;
+ }
+ }
+ else
+ {
+ Lisp_Object initial_value, value;
+ int count = specpdl_ptr - specpdl;
+
+ if (! NILP (object))
+ CHECK_BUFFER (object, 0);
+
+ if (BUFFERP (object) && current_buffer != XBUFFER (object))
+ {
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ Fset_buffer (object);
+ }
+
+ initial_value = Fget_char_property (position, prop, object);
+
+ if (NILP (limit))
+ XSETFASTINT (limit, BUF_ZV (current_buffer));
+ else
+ CHECK_NUMBER_COERCE_MARKER (limit, 0);
+
+ for (;;)
+ {
+ position = Fnext_char_property_change (position, limit);
+ if (XFASTINT (position) >= XFASTINT (limit)) {
+ position = limit;
+ break;
+ }
+
+ value = Fget_char_property (position, prop, object);
+ if (!EQ (value, initial_value))
+ break;
+ }
+
+ unbind_to (count, Qnil);
+ }
+
+ return position;
+}
+
+DEFUN ("previous-single-char-property-change",
+ Fprevious_single_char_property_change,
+ Sprevious_single_char_property_change, 2, 4, 0,
+ "Return the position of previous text property or overlay change for a specific property.\n\
+Scans characters backward from POSITION till it finds\n\
+a change in the PROP property, then returns the position of the change.\n\
+The optional third argument OBJECT is the string or buffer to scan.\n\
+The property values are compared with `eq'.\n\
+Return nil if the property is constant all the way to the start of OBJECT.\n\
+If the value is non-nil, it is a position less than POSITION, never equal.\n\n\
+If the optional fourth argument LIMIT is non-nil, don't search\n\
+back past position LIMIT; return LIMIT if nothing is found before LIMIT.")
+ (position, prop, object, limit)
+ Lisp_Object prop, position, object, limit;
+{
+ if (STRINGP (object))
+ {
+ position = Fprevious_single_property_change (position, prop, object, limit);
+ if (NILP (position))
+ {
+ if (NILP (limit))
+ position = make_number (XSTRING (object)->size);
+ else
+ position = limit;
+ }
+ }
+ else
+ {
+ int count = specpdl_ptr - specpdl;
+
+ if (! NILP (object))
+ CHECK_BUFFER (object, 0);
+
+ if (BUFFERP (object) && current_buffer != XBUFFER (object))
+ {
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ Fset_buffer (object);
+ }
+
+ if (NILP (limit))
+ XSETFASTINT (limit, BUF_BEGV (current_buffer));
+ else
+ CHECK_NUMBER_COERCE_MARKER (limit, 0);
+
+ if (XFASTINT (position) <= XFASTINT (limit))
+ position = limit;
+ else
+ {
+ Lisp_Object initial_value =
+ Fget_char_property (make_number (XFASTINT (position) - 1),
+ prop, object);
+
+ for (;;)
+ {
+ position = Fprevious_char_property_change (position, limit);
+
+ if (XFASTINT (position) <= XFASTINT (limit))
+ {
+ position = limit;
+ break;
+ }
+ else
+ {
+ Lisp_Object value =
+ Fget_char_property (make_number (XFASTINT (position) - 1),
+ prop, object);
+
+ if (!EQ (value, initial_value))
+ break;
+ }
+ }
+ }
+
+ unbind_to (count, Qnil);
+ }
+
+ return position;
+}
\f
DEFUN ("next-property-change", Fnext_property_change,
Snext_property_change, 1, 3, 0,
? XSTRING (object)->size
: BUF_ZV (XBUFFER (object))));
else
- XSETFASTINT (position, next->position - (STRINGP (object)));
+ XSETFASTINT (position, next->position);
return position;
}
if (! NILP (limit) && !(next->position < XFASTINT (limit)))
return limit;
- XSETFASTINT (position, next->position - (STRINGP (object)));
+ XSETFASTINT (position, next->position);
return position;
}
if (! NILP (limit) && !(next->position < XFASTINT (limit)))
return limit;
- XSETFASTINT (position, next->position - (STRINGP (object)));
- return position;
+ return make_number (next->position);
}
DEFUN ("previous-property-change", Fprevious_property_change,
previous = previous_interval (i);
while (! NULL_INTERVAL_P (previous) && intervals_equal (previous, i)
&& (NILP (limit)
- || previous->position + LENGTH (previous) > XFASTINT (limit)))
+ || (previous->position + LENGTH (previous) > XFASTINT (limit))))
previous = previous_interval (previous);
if (NULL_INTERVAL_P (previous))
return limit;
&& !(previous->position + LENGTH (previous) > XFASTINT (limit)))
return limit;
- XSETFASTINT (position, (previous->position + LENGTH (previous)
- - (STRINGP (object))));
- return position;
+ return make_number (previous->position + LENGTH (previous));
}
DEFUN ("previous-single-property-change", Fprevious_single_property_change,
while (! NULL_INTERVAL_P (previous)
&& EQ (here_val, textget (previous->plist, prop))
&& (NILP (limit)
- || previous->position + LENGTH (previous) > XFASTINT (limit)))
+ || (previous->position + LENGTH (previous) > XFASTINT (limit))))
previous = previous_interval (previous);
if (NULL_INTERVAL_P (previous))
return limit;
&& !(previous->position + LENGTH (previous) > XFASTINT (limit)))
return limit;
- XSETFASTINT (position, (previous->position + LENGTH (previous)
- - (STRINGP (object))));
- return position;
+ return make_number (previous->position + LENGTH (previous));
}
\f
/* Callers note, this can GC when OBJECT is a buffer (or nil). */
is the string or buffer containing the text.")
(start, end, properties, object)
Lisp_Object start, end, properties, object;
+{
+ return set_text_properties (start, end, properties, object, Qt);
+}
+
+
+/* Replace properties of text from START to END with new list of
+ properties PROPERTIES. OBJECT is the buffer or string containing
+ the text. OBJECT nil means use the current buffer.
+ SIGNAL_AFTER_CHANGE_P nil means don't signal after changes. Value
+ is non-nil if properties were replaced; it is nil if there weren't
+ any properties to replace. */
+
+Lisp_Object
+set_text_properties (start, end, properties, object, signal_after_change_p)
+ Lisp_Object start, end, properties, object, signal_after_change_p;
{
register INTERVAL i, unchanged;
register INTERVAL prev_changed = NULL_INTERVAL;
register int s, len;
Lisp_Object ostart, oend;
- int have_modified = 0;
ostart = start;
oend = end;
copy_properties (unchanged, i);
i = split_interval_left (i, len);
set_properties (properties, i, object);
- if (BUFFERP (object))
+ if (BUFFERP (object) && !NILP (signal_after_change_p))
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
if (LENGTH (i) == len)
{
- if (BUFFERP (object))
+ if (BUFFERP (object) && !NILP (signal_after_change_p))
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
set_properties (properties, i, object);
if (!NULL_INTERVAL_P (prev_changed))
merge_interval_left (i);
- if (BUFFERP (object))
+ if (BUFFERP (object) && !NILP (signal_after_change_p))
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
return Qt;
i = next_interval (i);
}
- if (BUFFERP (object))
+ if (BUFFERP (object) && !NILP (signal_after_change_p))
signal_after_change (XINT (start), XINT (end) - XINT (start),
XINT (end) - XINT (start));
return Qt;
pos = i->position;
if (pos < XINT (start))
pos = XINT (start);
- return make_number (pos - (STRINGP (object)));
+ return make_number (pos);
}
i = next_interval (i);
}
{
if (i->position > s)
s = i->position;
- return make_number (s - (STRINGP (object)));
+ return make_number (s);
}
i = next_interval (i);
}
return Qnil;
}
\f
-#if 0 /* You can use set-text-properties for this. */
-
-DEFUN ("erase-text-properties", Ferase_text_properties,
- Serase_text_properties, 2, 3, 0,
- "Remove all properties from the text from START to END.\n\
-The optional third argument, OBJECT,\n\
-is the string or buffer containing the text.")
- (start, end, object)
- Lisp_Object start, end, object;
-{
- register INTERVAL i;
- register INTERVAL prev_changed = NULL_INTERVAL;
- register int s, len, modified;
-
- if (NILP (object))
- XSETBUFFER (object, current_buffer);
-
- i = validate_interval_range (object, &start, &end, soft);
- if (NULL_INTERVAL_P (i))
- return Qnil;
-
- s = XINT (start);
- len = XINT (end) - s;
-
- if (i->position != s)
- {
- register int got;
- register INTERVAL unchanged = i;
-
- /* If there are properties here, then this text will be modified. */
- if (! NILP (i->plist))
- {
- i = split_interval_right (unchanged, s - unchanged->position);
- i->plist = Qnil;
- modified++;
-
- if (LENGTH (i) > len)
- {
- i = split_interval_right (i, len);
- copy_properties (unchanged, i);
- return Qt;
- }
-
- if (LENGTH (i) == len)
- return Qt;
-
- got = LENGTH (i);
- }
- /* If the text of I is without any properties, and contains
- LEN or more characters, then we may return without changing
- anything.*/
- else if (LENGTH (i) - (s - i->position) <= len)
- return Qnil;
- /* The amount of text to change extends past I, so just note
- how much we've gotten. */
- else
- got = LENGTH (i) - (s - i->position);
-
- len -= got;
- prev_changed = i;
- i = next_interval (i);
- }
-
- /* We are starting at the beginning of an interval, I. */
- while (len > 0)
- {
- if (LENGTH (i) >= len)
- {
- /* If I has no properties, simply merge it if possible. */
- if (NILP (i->plist))
- {
- if (! NULL_INTERVAL_P (prev_changed))
- merge_interval_left (i);
-
- return modified ? Qt : Qnil;
- }
-
- if (LENGTH (i) > len)
- i = split_interval_left (i, len);
- if (! NULL_INTERVAL_P (prev_changed))
- merge_interval_left (i);
- else
- i->plist = Qnil;
-
- return Qt;
- }
-
- /* Here if we still need to erase past the end of I */
- len -= LENGTH (i);
- if (NULL_INTERVAL_P (prev_changed))
- {
- modified += erase_properties (i);
- prev_changed = i;
- }
- else
- {
- modified += ! NILP (i->plist);
- /* Merging I will give it the properties of PREV_CHANGED. */
- prev_changed = i = merge_interval_left (i);
- }
-
- i = next_interval (i);
- }
-
- return modified ? Qt : Qnil;
-}
-#endif /* 0 */
-
/* I don't think this is the right interface to export; how often do you
want to do something like this, other than when you're copying objects
around?
Return t if any property value actually changed, nil otherwise. */
/* Note this can GC when DEST is a buffer. */
-\f
+
Lisp_Object
copy_text_properties (start, end, src, pos, dest, prop)
Lisp_Object start, end, src, pos, dest, prop;
return modified ? Qt : Qnil;
}
+
+
+/* Return a list representing the text properties of OBJECT between
+ START and END. if PROP is non-nil, report only on that property.
+ Each result list element has the form (S E PLIST), where S and E
+ are positions in OBJECT and PLIST is a property list containing the
+ text properties of OBJECT between S and E. Value is nil if OBJECT
+ doesn't contain text properties between START and END. */
+
+Lisp_Object
+text_property_list (object, start, end, prop)
+ Lisp_Object object, start, end, prop;
+{
+ struct interval *i;
+ Lisp_Object result;
+
+ result = Qnil;
+
+ i = validate_interval_range (object, &start, &end, soft);
+ if (!NULL_INTERVAL_P (i))
+ {
+ int s = XINT (start);
+ int e = XINT (end);
+
+ while (s < e)
+ {
+ int interval_end, len;
+ Lisp_Object plist;
+
+ interval_end = i->position + LENGTH (i);
+ if (interval_end > e)
+ interval_end = e;
+ len = interval_end - s;
+
+ plist = i->plist;
+
+ if (!NILP (prop))
+ for (; !NILP (plist); plist = Fcdr (Fcdr (plist)))
+ if (EQ (Fcar (plist), prop))
+ {
+ plist = Fcons (prop, Fcons (Fcar (Fcdr (plist)), Qnil));
+ break;
+ }
+
+ if (!NILP (plist))
+ result = Fcons (Fcons (make_number (s),
+ Fcons (make_number (s + len),
+ Fcons (plist, Qnil))),
+ result);
+
+ i = next_interval (i);
+ if (NULL_INTERVAL_P (i))
+ break;
+ s = i->position;
+ }
+ }
+
+ return result;
+}
+
+
+/* Add text properties to OBJECT from LIST. LIST is a list of triples
+ (START END PLIST), where START and END are positions and PLIST is a
+ property list containing the text properties to add. Adjust START
+ and END positions by DELTA before adding properties. Value is
+ non-zero if OBJECT was modified. */
+
+int
+add_text_properties_from_list (object, list, delta)
+ Lisp_Object object, list, delta;
+{
+ struct gcpro gcpro1, gcpro2;
+ int modified_p = 0;
+
+ GCPRO2 (list, object);
+
+ for (; CONSP (list); list = XCDR (list))
+ {
+ Lisp_Object item, start, end, plist, tem;
+
+ item = XCAR (list);
+ start = make_number (XINT (XCAR (item)) + XINT (delta));
+ end = make_number (XINT (XCAR (XCDR (item))) + XINT (delta));
+ plist = XCAR (XCDR (XCDR (item)));
+
+ tem = Fadd_text_properties (start, end, plist, object);
+ if (!NILP (tem))
+ modified_p = 1;
+ }
+
+ UNGCPRO;
+ return modified_p;
+}
+
+
+
+/* Modify end-points of ranges in LIST destructively. LIST is a list
+ as returned from text_property_list. Change end-points equal to
+ OLD_END to NEW_END. */
+
+void
+extend_property_ranges (list, old_end, new_end)
+ Lisp_Object list, old_end, new_end;
+{
+ for (; CONSP (list); list = XCDR (list))
+ {
+ Lisp_Object item, end;
+
+ item = XCAR (list);
+ end = XCAR (XCDR (item));
+
+ if (EQ (end, old_end))
+ XCAR (XCDR (item)) = new_end;
+ }
+}
+
+
\f
/* Call the modification hook functions in LIST, each with START and END. */
UNGCPRO;
}
-/* Check for read-only intervals and signal an error if we find one.
- Then check for any modification hooks in the range START up to
- (but not including) END. Create a list of all these hooks in
- lexicographic order, eliminating consecutive extra copies of the
- same hook. Then call those hooks in order, with START and END - 1
- as arguments. */
+/* Check for read-only intervals between character positions START ... END,
+ in BUF, and signal an error if we find one.
+
+ Then check for any modification hooks in the range.
+ Create a list of all these hooks in lexicographic order,
+ eliminating consecutive extra copies of the same hook. Then call
+ those hooks in order, with START and END - 1 as arguments. */
void
verify_interval_modification (buf, start, end)
int start, end;
{
register INTERVAL intervals = BUF_INTERVALS (buf);
- register INTERVAL i, prev;
+ register INTERVAL i;
Lisp_Object hooks;
register Lisp_Object prev_mod_hooks;
Lisp_Object mod_hooks;
/* For an insert operation, check the two chars around the position. */
if (start == end)
{
- INTERVAL prev;
+ INTERVAL prev = NULL;
Lisp_Object before, after;
/* Set I to the interval containing the char after START,
if (TMEM (Qread_only, tem)
|| (NILP (Fplist_get (i->plist, Qread_only))
&& TMEM (Qcategory, tem)))
- error ("Attempt to insert within read-only text");
+ text_read_only ();
}
}
if (! TMEM (Qread_only, tem)
&& (! NILP (Fplist_get (prev->plist,Qread_only))
|| ! TMEM (Qcategory, tem)))
- error ("Attempt to insert within read-only text");
+ text_read_only ();
}
}
}
if (TMEM (Qread_only, tem)
|| (NILP (Fplist_get (i->plist, Qread_only))
&& TMEM (Qcategory, tem)))
- error ("Attempt to insert within read-only text");
+ text_read_only ();
tem = textget (prev->plist, Qrear_nonsticky);
if (! TMEM (Qread_only, tem)
&& (! NILP (Fplist_get (prev->plist, Qread_only))
|| ! TMEM (Qcategory, tem)))
- error ("Attempt to insert within read-only text");
+ text_read_only ();
}
}
}
do
{
if (! INTERVAL_WRITABLE_P (i))
- error ("Attempt to modify read-only text");
+ text_read_only ();
mod_hooks = textget (i->plist, Qmodification_hooks);
if (! NILP (mod_hooks) && ! EQ (mod_hooks, prev_mod_hooks))
}
}
-/* Run the interval hooks for an insertion.
+/* Run the interval hooks for an insertion on character range START ... END.
verify_interval_modification chose which hooks to run;
this function is called after the insertion happens
so it can indicate the range of inserted text. */
Lisp_Object start, end;
{
if (! NILP (interval_insert_behind_hooks))
- call_mod_hooks (interval_insert_behind_hooks,
- make_number (start), make_number (end));
+ call_mod_hooks (interval_insert_behind_hooks, start, end);
if (! NILP (interval_insert_in_front_hooks)
&& ! EQ (interval_insert_in_front_hooks,
interval_insert_behind_hooks))
- call_mod_hooks (interval_insert_in_front_hooks,
- make_number (start), make_number (end));
+ call_mod_hooks (interval_insert_in_front_hooks, start, end);
}
\f
void
This also inhibits the use of the `intangible' text property.");
Vinhibit_point_motion_hooks = Qnil;
+ DEFVAR_LISP ("text-property-default-nonsticky",
+ &Vtext_property_default_nonsticky,
+ "Alist of properties vs the corresponding non-stickinesses.\n\
+Each element has the form (PROPERTY . NONSTICKINESS).\n\
+\n\
+If a character in a buffer has PROPERTY, new text inserted adjacent to\n\
+the character doesn't inherit PROPERTY if NONSTICKINESS is non-nil,\n\
+inherits it if NONSTICKINESS is nil. The front-sticky and\n\
+rear-nonsticky properties of the character overrides NONSTICKINESS.");
+ Vtext_property_default_nonsticky = Qnil;
+
staticpro (&interval_insert_behind_hooks);
staticpro (&interval_insert_in_front_hooks);
interval_insert_behind_hooks = Qnil;
Qfront_sticky = intern ("front-sticky");
staticpro (&Qrear_nonsticky);
Qrear_nonsticky = intern ("rear-nonsticky");
+ staticpro (&Qmouse_face);
+ Qmouse_face = intern ("mouse-face");
/* Properties that text might use to specify certain actions */
defsubr (&Sget_char_property);
defsubr (&Snext_char_property_change);
defsubr (&Sprevious_char_property_change);
+ defsubr (&Snext_single_char_property_change);
+ defsubr (&Sprevious_single_char_property_change);
defsubr (&Snext_property_change);
defsubr (&Snext_single_property_change);
defsubr (&Sprevious_property_change);
/* defsubr (&Scopy_text_properties); */
}
-#else
-
-lose -- this shouldn't be compiled if USE_TEXT_PROPERTIES isn't defined
-
-#endif /* USE_TEXT_PROPERTIES */