/* 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.
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
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