/* If in middle of an interval which is not sticky either way,
we must not just give its properties to the insertion.
- So split this interval at the insertion point. */
- if (! (position == i->position || eobp)
- && END_NONSTICKY_P (i)
- && FRONT_NONSTICKY_P (i))
+ So split this interval at the insertion point.
+
+ Originally, the if condition here was this:
+ (! (position == i->position || eobp)
+ && END_NONSTICKY_P (i)
+ && FRONT_NONSTICKY_P (i))
+ But, these macros are now unreliable because of introduction of
+ Vtext_property_default_nonsticky. So, we always check properties
+ one by one if POSITION is in middle of an interval. */
+ if (! (position == i->position || eobp))
{
Lisp_Object tail;
Lisp_Object front, rear;
+ tail = i->plist;
+
+ /* Properties font-sticky and rear-nonsticky override
+ Vtext_property_default_nonsticky. So, if they are t, we can
+ skip one by one checking of properties. */
+ rear = textget (i->plist, Qrear_nonsticky);
+ if (! CONSP (rear) && ! NILP (rear))
+ {
+ /* All properties are nonsticky. We split the interval. */
+ goto check_done;
+ }
front = textget (i->plist, Qfront_sticky);
- rear = textget (i->plist, Qrear_nonsticky);
+ if (! CONSP (front) && ! NILP (front))
+ {
+ /* All properties are sticky. We don't split the interval. */
+ tail = Qnil;
+ goto check_done;
+ }
- /* Does any actual property pose an actual problem? */
- for (tail = i->plist; ! NILP (tail); tail = Fcdr (Fcdr (tail)))
+ /* Does any actual property pose an actual problem? We break
+ the loop if we find a nonsticky property. */
+ for (; CONSP (tail); tail = Fcdr (XCDR (tail)))
{
- Lisp_Object prop;
+ Lisp_Object prop, tmp;
prop = XCAR (tail);
- /* Is this particular property rear-sticky?
- Note, if REAR isn't a cons, it must be non-nil,
- which means that all properties are rear-nonsticky. */
- if (CONSP (rear) && NILP (Fmemq (prop, rear)))
- continue;
-
- /* Is this particular property front-sticky?
- Note, if FRONT isn't a cons, it must be nil,
- which means that all properties are front-nonsticky. */
+ /* Is this particular property front-sticky? */
if (CONSP (front) && ! NILP (Fmemq (prop, front)))
continue;
- /* PROP isn't sticky on either side => it is a real problem. */
- break;
+ /* Is this particular property rear-nonsticky? */
+ if (CONSP (rear) && ! NILP (Fmemq (prop, rear)))
+ break;
+
+ /* Is this particular property recorded as sticky or
+ nonsticky in Vtext_property_default_nonsticky? */
+ tmp = Fassq (prop, Vtext_property_default_nonsticky);
+ if (CONSP (tmp))
+ {
+ if (NILP (tmp))
+ continue;
+ break;
+ }
+
+ /* By default, a text property is rear-sticky, thus we
+ continue the loop. */
}
+ check_done:
/* If any property is a real problem, split the interval. */
if (! NILP (tail))
{
}
/* If at least one interval has sticky properties,
- we check the stickiness property by property. */
- if (END_NONSTICKY_P (prev) || FRONT_STICKY_P (i))
+ we check the stickiness property by property.
+
+ Originally, the if condition here was this:
+ (END_NONSTICKY_P (prev) || FRONT_STICKY_P (i))
+ But, these macros are now unreliable because of introduction
+ of Vtext_property_default_nonsticky. So, we always have to
+ check stickiness of properties one by one. If cache of
+ stickiness is implemented in the future, we may be able to
+ use those macros again. */
+ if (1)
{
Lisp_Object pleft, pright;
struct interval newi;
rrear = textget (pright, Qrear_nonsticky);
/* Go through each element of PRIGHT. */
- for (tail1 = pright; ! NILP (tail1); tail1 = Fcdr (Fcdr (tail1)))
+ for (tail1 = pright; CONSP (tail1); tail1 = Fcdr (Fcdr (tail1)))
{
+ Lisp_Object tmp;
+
sym = Fcar (tail1);
/* Sticky properties get special treatment. */
continue;
rval = Fcar (Fcdr (tail1));
- for (tail2 = pleft; ! NILP (tail2); tail2 = Fcdr (Fcdr (tail2)))
+ for (tail2 = pleft; CONSP (tail2); tail2 = Fcdr (Fcdr (tail2)))
if (EQ (sym, Fcar (tail2)))
break;
lpresent = ! NILP (tail2);
lval = (NILP (tail2) ? Qnil : Fcar (Fcdr (tail2)));
- use_left = ! TMEM (sym, lrear) && lpresent;
- use_right = TMEM (sym, rfront);
+ /* Even if lrear or rfront say nothing about the stickiness of
+ SYM, Vtext_property_default_nonsticky may give default
+ stickiness to SYM. */
+ tmp = Fassq (sym, Vtext_property_default_nonsticky);
+ use_left = (lpresent
+ && ! (TMEM (sym, lrear)
+ || CONSP (tmp) && ! NILP (XCDR (tmp))));
+ use_right = (TMEM (sym, rfront)
+ || (CONSP (tmp) && NILP (XCDR (tmp))));
if (use_left && use_right)
{
if (NILP (lval))
}
/* Now go through each element of PLEFT. */
- for (tail2 = pleft; ! NILP (tail2); tail2 = Fcdr (Fcdr (tail2)))
+ for (tail2 = pleft; CONSP (tail2); tail2 = Fcdr (Fcdr (tail2)))
{
+ Lisp_Object tmp;
+
sym = Fcar (tail2);
/* Sticky properties get special treatment. */
continue;
/* If sym is in PRIGHT, we've already considered it. */
- for (tail1 = pright; ! NILP (tail1); tail1 = Fcdr (Fcdr (tail1)))
+ for (tail1 = pright; CONSP (tail1); tail1 = Fcdr (Fcdr (tail1)))
if (EQ (sym, Fcar (tail1)))
break;
if (! NILP (tail1))
lval = Fcar (Fcdr (tail2));
+ /* Even if lrear or rfront say nothing about the stickiness of
+ SYM, Vtext_property_default_nonsticky may give default
+ stickiness to SYM. */
+ tmp = Fassq (sym, Vtext_property_default_nonsticky);
+
/* Since rval is known to be nil in this loop, the test simplifies. */
- if (! TMEM (sym, lrear))
+ if (! (TMEM (sym, lrear) || (CONSP (tmp) && ! NILP (XCDR (tmp)))))
{
props = Fcons (lval, Fcons (sym, props));
if (TMEM (sym, lfront))
front = Fcons (sym, front);
}
- else if (TMEM (sym, rfront))
+ else if (TMEM (sym, rfront) || (CONSP (tmp) && NILP (XCDR (tmp))))
{
/* The value is nil, but we still inherit the stickiness
from the right. */
= split_interval_left (this, position - under->position);
copy_properties (under, end_unchanged);
under->position = position;
+#if 0
+ /* This code has no effect. */
prev = 0;
middle = 1;
+#endif /* 0 */
}
else
{
+ /* This call may have some effect because previous_interval may
+ update `position' fields of intervals. Thus, don't ignore it
+ for the moment. Someone please tell me the truth (K.Handa). */
prev = previous_interval (under);
+#if 0
+ /* But, this code surely has no effect. And, anyway,
+ END_NONSTICKY_P is unreliable now. */
if (prev && !END_NONSTICKY_P (prev))
prev = 0;
+#endif /* 0 */
}
/* Insertion is now at beginning of UNDER. */
SET_PT (position);
}
\f
+/* If text at position POS has property PROP, set *VAL to the property
+ value, *START and *END to the beginning and end of a region that
+ has the same property, and return 1. Otherwise return 0.
+
+ OBJECT is the string or buffer to look for the property in;
+ nil means the current buffer. */
+
+int
+get_property_and_range (pos, prop, val, start, end, object)
+ int pos;
+ Lisp_Object prop, *val;
+ int *start, *end;
+ Lisp_Object object;
+{
+ INTERVAL i, prev, next;
+
+ if (NILP (object))
+ i = find_interval (BUF_INTERVALS (current_buffer), pos);
+ else if (BUFFERP (object))
+ i = find_interval (BUF_INTERVALS (XBUFFER (object)), pos);
+ else if (STRINGP (object))
+ i = find_interval (XSTRING (object)->intervals, pos);
+ else
+ abort ();
+
+ if (NULL_INTERVAL_P (i) || (i->position + LENGTH (i) <= pos))
+ return 0;
+ *val = textget (i->plist, prop);
+ if (NILP (*val))
+ return 0;
+
+ next = i; /* remember it in advance */
+ prev = previous_interval (i);
+ while (! NULL_INTERVAL_P (prev)
+ && EQ (*val, textget (prev->plist, prop)))
+ i = prev, prev = previous_interval (prev);
+ *start = i->position;
+
+ next = next_interval (i);
+ while (! NULL_INTERVAL_P (next)
+ && EQ (*val, textget (next->plist, prop)))
+ i = next, next = next_interval (next);
+ *end = i->position + LENGTH (i);
+
+ return 1;
+}
+\f
/* Return the proper local map for position POSITION in BUFFER.
Use the map specified by the local-map property, if any.
Otherwise, use BUFFER's local map. */
projects / emacs.git / commitdiff