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Commit d4b530ad authored by Richard M. Stallman's avatar Richard M. Stallman
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(Fadd_text_properties, Fremove_text_properties): 

Add len>0 as condition for main loop.
Abort if reach a null interval.
(Fset_text_properties): Abort if reach a null interval.
(Ftext_properties_at, Fget_text_property):
Return nil if POS is end of OBJECT.
(add_properties): Use NILP to test result of Fequal.
No longer inline.
(remove_properties): No longer inline.
(set_properties): Total rewrite as function.
(validate_interval_range): Don't alter *begin at end of buffer.
But do search for a position just before the end.
Return null for an empty string.

(validate_interval_range): Allow 0 as position in string.
Add 1 to specified string positions.
(Fprevious_single_property_change): Subtract 1 if object is string.
(Fnext_single_property_change): Likewise.
(Fprevious_property_change, Fnext_property_change): Likewise.

(remove_properties): Call modify_buffer.
(add_properties): Likewise.

(Fadd_text_properties): Pass new arg to add_properties.
(Fremove_text_properties): Likewise.
(add_properties, remove_properties): New arg OBJECT.  Record undo info.
(Fput_text_property): New function.
parent 323a7ad4
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Showing with 172 additions and 41 deletions
src/textprop.c
View file @ d4b530ad
......@@ -30,7 +30,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
set_properties needs to deal with the interval property cache.
It is assumed that for any interval plist, a property appears
only once on the list. Although some code i.e., remove_properties (),
only once on the list. Although some code i.e., remove_properties,
handles the more general case, the uniqueness of properties is
neccessary for the system to remain consistent. This requirement
is enforced by the subrs installing properties onto the intervals. */
......@@ -56,6 +56,9 @@ Lisp_Object Qinvisible, Qread_only;
to by BEGIN and END may be integers or markers; if the latter, they
are coerced to integers.
When OBJECT is a string, we increment *BEGIN and *END
to make them origin-one.
Note that buffer points don't correspond to interval indices.
For example, point-max is 1 greater than the index of the last
character. This difference is handled in the caller, which uses
......@@ -67,7 +70,7 @@ Lisp_Object Qinvisible, Qread_only;
If FORCE is soft (0), it's OK to return NULL_INTERVAL. Otherwise,
create an interval tree for OBJECT if one doesn't exist, provided
the object actually contains text. In the current design, if there
is no text, there can be no text properties. */
is no text, there can be no text properties. */
#define soft 0
#define hard 1
......@@ -78,6 +81,8 @@ validate_interval_range (object, begin, end, force)
int force;
{
register INTERVAL i;
int searchpos;
CHECK_STRING_OR_BUFFER (object, 0);
CHECK_NUMBER_COERCE_MARKER (*begin, 0);
CHECK_NUMBER_COERCE_MARKER (*end, 0);
......@@ -89,44 +94,60 @@ validate_interval_range (object, begin, end, force)
if (XINT (*begin) > XINT (*end))
{
register int n;
n = XFASTINT (*begin); /* This is legit even if *begin is < 0 */
Lisp_Object n;
n = *begin;
*begin = *end;
XFASTINT (*end) = n; /* because this is all we do with n. */
*end = n;
}
if (XTYPE (object) == Lisp_Buffer)
{
register struct buffer *b = XBUFFER (object);
/* If there's no text, there are no properties. */
if (BUF_BEGV (b) == BUF_ZV (b))
return NULL_INTERVAL;
if (!(BUF_BEGV (b) <= XINT (*begin) && XINT (*begin) <= XINT (*end)
&& XINT (*end) <= BUF_ZV (b)))
args_out_of_range (*begin, *end);
i = b->intervals;
/* If there's no text, there are no properties. */
if (BUF_BEGV (b) == BUF_ZV (b))
return NULL_INTERVAL;
searchpos = XINT (*begin);
if (searchpos == BUF_Z (b))
searchpos--;
#if 0
/* Special case for point-max: return the interval for the
last character. */
if (*begin == *end && *begin == BUF_Z (b))
*begin -= 1;
#endif
}
else
{
register struct Lisp_String *s = XSTRING (object);
if (! (1 <= XINT (*begin) && XINT (*begin) <= XINT (*end)
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. */
XFASTINT (*begin) += 1;
XFASTINT (*end) += 1;
i = s->intervals;
if (s->size == 0)
return NULL_INTERVAL;
searchpos = XINT (*begin);
if (searchpos > s->size)
searchpos--;
}
if (NULL_INTERVAL_P (i))
return (force ? create_root_interval (object) : i);
return find_interval (i, XINT (*begin));
return find_interval (i, searchpos);
}
/* Validate LIST as a property list. If LIST is not a list, then
......@@ -153,8 +174,6 @@ validate_plist (list)
return Fcons (list, Fcons (Qnil, Qnil));
}
#define set_properties(list,i) (i->plist = Fcopy_sequence (list))
/* Return nonzero if interval I has all the properties,
with the same values, of list PLIST. */
......@@ -217,18 +236,49 @@ interval_has_some_properties (plist, i)
return 0;
}
/* Set the properties of INTERVAL to PROPERTIES,
and record undo info for the previous values.
OBJECT is the string or buffer that INTERVAL belongs to. */
static void
set_properties (properties, interval, object)
Lisp_Object properties, object;
INTERVAL interval;
{
Lisp_Object oldprops;
oldprops = interval->plist;
/* Record undo for old properties. */
while (XTYPE (oldprops) == Lisp_Cons)
{
Lisp_Object sym;
sym = Fcar (oldprops);
record_property_change (interval->position, LENGTH (interval),
sym, Fcar_safe (Fcdr (oldprops)),
object);
oldprops = Fcdr_safe (Fcdr (oldprops));
}
/* Store new properties. */
interval->plist = Fcopy_sequence (properties);
}
/* Add the properties of PLIST to the interval I, or set
the value of I's property to the value of the property on PLIST
if they are different.
OBJECT should be the string or buffer the interval is in.
Return nonzero if this changes I (i.e., if any members of PLIST
are actually added to I's plist) */
static INLINE int
add_properties (plist, i)
static int
add_properties (plist, i, object)
Lisp_Object plist;
INTERVAL i;
Lisp_Object object;
{
register Lisp_Object tail1, tail2, sym1, val1;
register int changed = 0;
......@@ -252,9 +302,18 @@ add_properties (plist, i)
/* The properties have the same value on both lists.
Continue to the next property. */
if (Fequal (val1, Fcar (this_cdr)))
if (!NILP (Fequal (val1, Fcar (this_cdr))))
break;
/* Record this change in the buffer, for undo purposes. */
if (XTYPE (object) == Lisp_Buffer)
{
record_property_change (i->position, LENGTH (i),
sym1, Fcar (this_cdr), object);
modify_region (make_number (i->position),
make_number (i->position + LENGTH (i)));
}
/* I's property has a different value -- change it */
Fsetcar (this_cdr, val1);
changed++;
......@@ -263,6 +322,14 @@ add_properties (plist, i)
if (! found)
{
/* Record this change in the buffer, for undo purposes. */
if (XTYPE (object) == Lisp_Buffer)
{
record_property_change (i->position, LENGTH (i),
sym1, Qnil, object);
modify_region (make_number (i->position),
make_number (i->position + LENGTH (i)));
}
i->plist = Fcons (sym1, Fcons (val1, i->plist));
changed++;
}
......@@ -272,12 +339,14 @@ add_properties (plist, i)
}
/* For any members of PLIST which are properties of I, remove them
from I's plist. */
from I's plist.
OBJECT is the string or buffer containing I. */
static INLINE int
remove_properties (plist, i)
static int
remove_properties (plist, i, object)
Lisp_Object plist;
INTERVAL i;
Lisp_Object object;
{
register Lisp_Object tail1, tail2, sym;
register Lisp_Object current_plist = i->plist;
......@@ -291,6 +360,15 @@ remove_properties (plist, i)
/* First, remove the symbol if its at the head of the list */
while (! NILP (current_plist) && EQ (sym, Fcar (current_plist)))
{
if (XTYPE (object) == Lisp_Buffer)
{
record_property_change (i->position, LENGTH (i),
sym, Fcar (Fcdr (current_plist)),
object);
modify_region (make_number (i->position),
make_number (i->position + LENGTH (i)));
}
current_plist = Fcdr (Fcdr (current_plist));
changed++;
}
......@@ -302,6 +380,14 @@ remove_properties (plist, i)
register Lisp_Object this = Fcdr (Fcdr (tail2));
if (EQ (sym, Fcar (this)))
{
if (XTYPE (object) == Lisp_Buffer)
{
record_property_change (i->position, LENGTH (i),
sym, Fcar (Fcdr (this)), object);
modify_region (make_number (i->position),
make_number (i->position + LENGTH (i)));
}
Fsetcdr (Fcdr (tail2), Fcdr (Fcdr (this)));
changed++;
}
......@@ -314,6 +400,7 @@ remove_properties (plist, i)
return changed;
}
#if 0
/* Remove all properties from interval I. Return non-zero
if this changes the interval. */
......@@ -327,12 +414,14 @@ erase_properties (i)
i->plist = Qnil;
return 1;
}
#endif
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.")
defaults to the current buffer.\n\
If POSITION is at the end of OBJECT, the value is nil.")
(pos, object)
Lisp_Object pos, object;
{
......@@ -344,13 +433,20 @@ defaults to the current buffer.")
i = validate_interval_range (object, &pos, &pos, soft);
if (NULL_INTERVAL_P (i))
return Qnil;
/* If POS is at the end of the interval,
it means it's the end of OBJECT.
There are no properties at the very end,
since no character follows. */
if (XINT (pos) == LENGTH (i) + i->position)
return Qnil;
return i->plist;
}
DEFUN ("get-text-property", Fget_text_property, Sget_text_property, 2, 3, 0,
"Return the value of position POS's property PROP, in OBJECT.\n\
OBJECT is optional and defaults to the current buffer.")
OBJECT is optional and defaults to the current buffer.\n\
If POSITION is at the end of OBJECT, the value is nil.")
(pos, prop, object)
Lisp_Object pos, object;
register Lisp_Object prop;
......@@ -360,11 +456,17 @@ OBJECT is optional and defaults to the current buffer.")
if (NILP (object))
XSET (object, Lisp_Buffer, current_buffer);
i = validate_interval_range (object, &pos, &pos, soft);
if (NULL_INTERVAL_P (i))
return Qnil;
/* If POS is at the end of the interval,
it means it's the end of OBJECT.
There are no properties at the very end,
since no character follows. */
if (XINT (pos) == LENGTH (i) + i->position)
return Qnil;
for (tail = i->plist; !NILP (tail); tail = Fcdr (Fcdr (tail)))
{
register Lisp_Object tem;
......@@ -402,7 +504,8 @@ If the value is non-nil, it is a position greater than POS, never equal.")
if (NULL_INTERVAL_P (next))
return Qnil;
return next->position;
return next->position - (XTYPE (object) == Lisp_String);
;
}
DEFUN ("next-single-property-change", Fnext_single_property_change,
......@@ -434,7 +537,7 @@ If the value is non-nil, it is a position greater than POS, never equal.")
if (NULL_INTERVAL_P (next))
return Qnil;
return next->position;
return next->position - (XTYPE (object) == Lisp_String);
}
DEFUN ("previous-property-change", Fprevious_property_change,
......@@ -463,7 +566,8 @@ If the value is non-nil, it is a position less than POS, never equal.")
if (NULL_INTERVAL_P (previous))
return Qnil;
return previous->position + LENGTH (previous) - 1;
return (previous->position + LENGTH (previous) - 1
- (XTYPE (object) == Lisp_String));
}
DEFUN ("previous-single-property-change", Fprevious_single_property_change,
......@@ -495,7 +599,8 @@ If the value is non-nil, it is a position less than POS, never equal.")
if (NULL_INTERVAL_P (previous))
return Qnil;
return previous->position + LENGTH (previous) - 1;
return (previous->position + LENGTH (previous) - 1
- (XTYPE (object) == Lisp_String));
}
DEFUN ("add-text-properties", Fadd_text_properties,
......@@ -548,11 +653,11 @@ Return t if any property value actually changed, nil otherwise.")
{
i = split_interval_left (i, len + 1);
copy_properties (unchanged, i);
add_properties (properties, i);
add_properties (properties, i, object);
return Qt;
}
add_properties (properties, i);
add_properties (properties, i, object);
modified = 1;
len -= LENGTH (i);
i = next_interval (i);
......@@ -560,8 +665,11 @@ Return t if any property value actually changed, nil otherwise.")
}
/* We are at the beginning of an interval, with len to scan */
while (1)
while (len > 0)
{
if (i == 0)
abort ();
if (LENGTH (i) >= len)
{
if (interval_has_all_properties (properties, i))
......@@ -569,7 +677,7 @@ Return t if any property value actually changed, nil otherwise.")
if (LENGTH (i) == len)
{
add_properties (properties, i);
add_properties (properties, i, object);
return Qt;
}
......@@ -577,16 +685,32 @@ Return t if any property value actually changed, nil otherwise.")
unchanged = i;
i = split_interval_left (unchanged, len + 1);
copy_properties (unchanged, i);
add_properties (properties, i);
add_properties (properties, i, object);
return Qt;
}
len -= LENGTH (i);
modified += add_properties (properties, i);
modified += add_properties (properties, i, object);
i = next_interval (i);
}
}
DEFUN ("put-text-property", Fput_text_property,
Sput_text_property, 4, 5, 0,
"Set one property of the text from START to END.\n\
The third and fourth arguments PROP and VALUE\n\
specify the property to add.\n\
The optional fifth argument, OBJECT,\n\
is the string or buffer containing the text.")
(start, end, prop, value, object)
Lisp_Object start, end, prop, value, object;
{
Fadd_text_properties (start, end,
Fcons (prop, Fcons (value, Qnil)),
object);
return Qnil;
}
DEFUN ("set-text-properties", Fset_text_properties,
Sset_text_properties, 3, 4, 0,
"Completely replace properties of text from START to END.\n\
......@@ -618,7 +742,7 @@ is the string or buffer containing the text.")
{
unchanged = i;
i = split_interval_right (unchanged, s - unchanged->position + 1);
set_properties (props, i);
set_properties (props, i, object);
if (LENGTH (i) > len)
{
......@@ -638,13 +762,16 @@ is the string or buffer containing the text.")
/* We are starting at the beginning of an interval, I */
while (len > 0)
{
if (i == 0)
abort ();
if (LENGTH (i) >= len)
{
if (LENGTH (i) > len)
i = split_interval_left (i, len + 1);
if (NULL_INTERVAL_P (prev_changed))
set_properties (props, i);
set_properties (props, i, object);
else
merge_interval_left (i);
return Qt;
......@@ -653,7 +780,7 @@ is the string or buffer containing the text.")
len -= LENGTH (i);
if (NULL_INTERVAL_P (prev_changed))
{
set_properties (props, i);
set_properties (props, i, object);
prev_changed = i;
}
else
......@@ -712,11 +839,11 @@ Return t if any property was actually removed, nil otherwise.")
{
i = split_interval_left (i, len + 1);
copy_properties (unchanged, i);
remove_properties (props, i);
remove_properties (props, i, object);
return Qt;
}
remove_properties (props, i);
remove_properties (props, i, object);
modified = 1;
len -= LENGTH (i);
i = next_interval (i);
......@@ -724,8 +851,11 @@ Return t if any property was actually removed, nil otherwise.")
}
/* We are at the beginning of an interval, with len to scan */
while (1)
while (len > 0)
{
if (i == 0)
abort ();
if (LENGTH (i) >= len)
{
if (! interval_has_some_properties (props, i))
......@@ -733,19 +863,19 @@ Return t if any property was actually removed, nil otherwise.")
if (LENGTH (i) == len)
{
remove_properties (props, i);
remove_properties (props, i, object);
return Qt;
}
/* i has the properties, and goes past the change limit */
unchanged = split_interval_right (i, len + 1);
copy_properties (unchanged, i);
remove_properties (props, i);
remove_properties (props, i, object);
return Qt;
}
len -= LENGTH (i);
modified += remove_properties (props, i);
modified += remove_properties (props, i, object);
i = next_interval (i);
}
}
......@@ -903,6 +1033,7 @@ percentage by which the left interval tree should not differ from the right.");
defsubr (&Sprevious_property_change);
defsubr (&Sprevious_single_property_change);
defsubr (&Sadd_text_properties);
defsubr (&Sput_text_property);
defsubr (&Sset_text_properties);
defsubr (&Sremove_text_properties);
/* defsubr (&Serase_text_properties); */
......
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