/* Copyright (c) 1994, 1995 Free Software Foundation, Inc.
Copyright (c) 1995 Sun Microsystems, Inc.
- Copyright (c) 1995, 1996 Ben Wing.
+ Copyright (c) 1995, 1996, 2000 Ben Wing.
This file is part of XEmacs.
EXFUN (Fextent_properties, 1);
EXFUN (Fset_extent_property, 3);
+/* if true, we don't want to set any redisplay flags on modeline extent
+ changes */
+int in_modeline_generation;
+
\f
/************************************************************************/
/* Generalized gap array */
else if (STRINGP (object))
{
/* #### Changes to string extents can affect redisplay if they are
- in the modeline or in the gutters.
-
+ in the modeline or in the gutters.
+
If the extent is in some generated-modeline-string: when we
change an extent in generated-modeline-string, this changes its
parent, which is in `modeline-format', so we should force the
is not very efficient. Should we add all
`generated-modeline-string' strings to a hash table? Maybe
efficiency is not the greatest concern here and there's no big
- loss in looping over the buffers.
+ loss in looping over the buffers.
If the extent is in a gutter we mark the gutter as
changed. This means (a) we can update extents in the gutters
when we need it. (b) we don't have to update the gutters when
only extents attached to buffers have changed. */
- MARK_EXTENTS_CHANGED;
+ if (!in_modeline_generation)
+ MARK_EXTENTS_CHANGED;
gutter_extent_signal_changed_region_maybe (object,
extent_endpoint_bufpos (extent, 0),
extent_endpoint_bufpos (extent, 1));
case ME_ALL_EXTENTS_OPEN: start_open = 1, end_open = 1; break;
case ME_ALL_EXTENTS_CLOSED_OPEN: start_open = 0, end_open = 1; break;
case ME_ALL_EXTENTS_OPEN_CLOSED: start_open = 1, end_open = 0; break;
- default: abort(); break;
+ default: abort(); return 0;
}
start = buffer_or_string_bytind_to_startind (obj, from,
retval = (start <= exs && exs <= end) || (start <= exe && exe <= end);
break;
default:
- abort(); break;
+ abort(); return 0;
}
return flags & ME_NEGATE_IN_REGION ? !retval : retval;
}
if ((NILP (obj) && (flags & DE_MUST_HAVE_BUFFER))
|| (extent_detached_p (extent) && (flags & DE_MUST_BE_ATTACHED)))
{
- signal_simple_error ("extent doesn't belong to a buffer or string",
- extent_obj);
+ invalid_argument ("extent doesn't belong to a buffer or string",
+ extent_obj);
}
return extent;
return Qnil;
for (rest = parent; !NILP (rest); rest = extent_parent (XEXTENT (rest)))
if (EQ (rest, extent))
- signal_simple_error ("Circular parent chain would result", extent);
+ signal_type_error (Qinvalid_change,
+ "Circular parent chain would result",
+ extent);
if (NILP (parent))
{
remove_extent_from_children_list (XEXTENT (cur_parent), extent);
EQ (sym, Qstart_and_end_in_region) ? ME_START_AND_END_IN_REGION :
EQ (sym, Qstart_or_end_in_region) ? ME_START_OR_END_IN_REGION :
EQ (sym, Qnegate_in_region) ? ME_NEGATE_IN_REGION :
- (signal_simple_error ("Invalid `map-extents' flag", sym), 0);
+ (invalid_argument ("Invalid `map-extents' flag", sym), 0);
flags = XCDR (flags);
}
struct extent_at_arg
{
- EXTENT best_match;
+ Lisp_Object best_match; /* or list of extents */
Memind best_start;
Memind best_end;
Lisp_Object prop;
EXTENT before;
+ int all_extents;
};
enum extent_at_flag
if (EQ (at_flag, Qbefore)) return EXTENT_AT_BEFORE;
if (EQ (at_flag, Qat)) return EXTENT_AT_AT;
- signal_simple_error ("Invalid AT-FLAG in `extent-at'", at_flag);
+ invalid_argument ("Invalid AT-FLAG in `extent-at'", at_flag);
return EXTENT_AT_AFTER; /* unreached */
}
return 0;
}
+ if (!closure->all_extents)
{
- EXTENT current = closure->best_match;
+ EXTENT current;
- if (!current)
+ if (NILP (closure->best_match))
goto accept;
+ current = XEXTENT (closure->best_match);
/* redundant but quick test */
- else if (extent_start (current) > extent_start (e))
+ if (extent_start (current) > extent_start (e))
return 0;
/* we return the "last" best fit, instead of the first --
else
return 0;
accept:
- closure->best_match = e;
+ XSETEXTENT (closure->best_match, e);
closure->best_start = extent_start (e);
closure->best_end = extent_end (e);
}
+ else
+ {
+ Lisp_Object extent;
+
+ XSETEXTENT (extent, e);
+ closure->best_match = Fcons (extent, closure->best_match);
+ }
return 0;
}
static Lisp_Object
extent_at_bytind (Bytind position, Lisp_Object object, Lisp_Object property,
- EXTENT before, enum extent_at_flag at_flag)
+ EXTENT before, enum extent_at_flag at_flag, int all_extents)
{
struct extent_at_arg closure;
- Lisp_Object extent_obj;
+ struct gcpro gcpro1;
/* it might be argued that invalid positions should cause
errors, but the principle of least surprise dictates that
: position > buffer_or_string_absolute_end_byte (object)))
return Qnil;
- closure.best_match = 0;
+ closure.best_match = Qnil;
closure.prop = property;
closure.before = before;
+ closure.all_extents = all_extents;
+ GCPRO1 (closure.best_match);
map_extents_bytind (at_flag == EXTENT_AT_BEFORE ? position - 1 : position,
at_flag == EXTENT_AT_AFTER ? position + 1 : position,
extent_at_mapper, (void *) &closure, object, 0,
ME_START_OPEN | ME_ALL_EXTENTS_CLOSED);
+ if (all_extents)
+ closure.best_match = Fnreverse (closure.best_match);
+ UNGCPRO;
- if (!closure.best_match)
- return Qnil;
-
- XSETEXTENT (extent_obj, closure.best_match);
- return extent_obj;
+ return closure.best_match;
}
DEFUN ("extent-at", Fextent_at, 1, 5, 0, /*
else
before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
if (before_extent && !EQ (object, extent_object (before_extent)))
- signal_simple_error ("extent not in specified buffer or string", object);
+ invalid_argument ("extent not in specified buffer or string", object);
+ fl = decode_extent_at_flag (at_flag);
+
+ return extent_at_bytind (position, object, property, before_extent, fl, 0);
+}
+
+DEFUN ("extents-at", Fextents_at, 1, 5, 0, /*
+Find all extents at POS in OBJECT having PROPERTY set.
+Normally, an extent is "at" POS if it overlaps the region (POS, POS+1);
+ i.e. if it covers the character after POS. (However, see the definition
+ of AT-FLAG.)
+This provides similar functionality to `extent-list', but does so in a way
+ that is compatible with `extent-at'. (For example, errors due to POS out of
+ range are ignored; this makes it safer to use this function in response to
+ a mouse event, because in many cases previous events have changed the buffer
+ contents.)
+OBJECT specifies a buffer or string and defaults to the current buffer.
+PROPERTY defaults to nil, meaning that any extent will do.
+Properties are attached to extents with `set-extent-property', which see.
+Returns nil if POS is invalid or there is no matching extent at POS.
+If the fourth argument BEFORE is not nil, it must be an extent; any returned
+ extent will precede that extent. This feature allows `extents-at' to be
+ used by a loop over extents.
+AT-FLAG controls how end cases are handled, and should be one of:
+
+nil or `after' An extent is at POS if it covers the character
+ after POS. This is consistent with the way
+ that text properties work.
+`before' An extent is at POS if it covers the character
+ before POS.
+`at' An extent is at POS if it overlaps or abuts POS.
+ This includes all zero-length extents at POS.
+
+Note that in all cases, the start-openness and end-openness of the extents
+considered is ignored. If you want to pay attention to those properties,
+you should use `map-extents', which gives you more control.
+*/
+ (pos, object, property, before, at_flag))
+{
+ Bytind position;
+ EXTENT before_extent;
+ enum extent_at_flag fl;
+
+ object = decode_buffer_or_string (object);
+ position = get_buffer_or_string_pos_byte (object, pos, GB_NO_ERROR_IF_BAD);
+ if (NILP (before))
+ before_extent = 0;
+ else
+ before_extent = decode_extent (before, DE_MUST_BE_ATTACHED);
+ if (before_extent && !EQ (object, extent_object (before_extent)))
+ invalid_argument ("extent not in specified buffer or string", object);
fl = decode_extent_at_flag (at_flag);
- return extent_at_bytind (position, object, property, before_extent, fl);
+ return extent_at_bytind (position, object, property, before_extent, fl, 1);
}
/* ------------------------------- */
if (EQ (layout_obj, Qwhitespace)) return GL_WHITESPACE;
if (EQ (layout_obj, Qtext)) return GL_TEXT;
- signal_simple_error ("Unknown glyph layout type", layout_obj);
+ invalid_argument ("Unknown glyph layout type", layout_obj);
return GL_TEXT; /* unreached */
}
/* text_props_only specifies whether we only consider text-property
extents (those with the 'text-prop property set) or all extents. */
if (!text_props_only)
- extent = extent_at_bytind (position, object, prop, 0, fl);
+ extent = extent_at_bytind (position, object, prop, 0, fl, 0);
else
{
EXTENT prior = 0;
while (1)
{
extent = extent_at_bytind (position, object, Qtext_prop, prior,
- fl);
+ fl, 0);
if (NILP (extent))
return Qnil;
if (EQ (prop, Fextent_property (extent, Qtext_prop, Qnil)))
prop = Fextent_property (extent, Qtext_prop, Qnil);
if (NILP (prop))
- signal_simple_error ("Internal error: no text-prop", extent);
+ signal_type_error (Qinternal_error,
+ "Internal error: no text-prop", extent);
val = Fextent_property (extent, prop, Qnil);
#if 0
/* removed by bill perry, 2/9/97
** with a value of Qnil. This is bad bad bad.
*/
if (NILP (val))
- signal_simple_error_2 ("Internal error: no text-prop",
- extent, prop);
+ signal_type_error_2 (Qinternal_error,
+ "Internal error: no text-prop",
+ extent, prop);
#endif
Fput_text_property (from, to, prop, val, Qnil);
return Qnil; /* important! */
DEFSUBR (Fmap_extents);
DEFSUBR (Fmap_extent_children);
DEFSUBR (Fextent_at);
+ DEFSUBR (Fextents_at);
DEFSUBR (Fset_extent_initial_redisplay_function);
DEFSUBR (Fextent_face);
projects / chise / xemacs-chise.git.1 / blobdiff