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/* Definitions and global variables for intervals.
Copyright (C) 1993, 1994, 2000, 2002 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "dispextern.h"
#define NULL_INTERVAL ((INTERVAL)0)
#define INTERVAL_DEFAULT NULL_INTERVAL
/* These are macros for dealing with the interval tree. */
/* Size of the structure used to represent an interval */
#define INTERVAL_SIZE (sizeof (struct interval))
/* Size of a pointer to an interval structure */
#define INTERVAL_PTR_SIZE (sizeof (struct interval *))
/* True if an interval pointer is null, or is a Lisp_Buffer or
Lisp_String pointer (meaning it points to the owner of this
interval tree). */
#ifdef NO_UNION_TYPE
#define INT_LISPLIKE(i) (BUFFERP ((Lisp_Object)(i)) \
|| STRINGP ((Lisp_Object)(i)))
#else
#define INT_LISPLIKE(i) (BUFFERP ((Lisp_Object){(EMACS_INT)(i)}) \
|| STRINGP ((Lisp_Object){(EMACS_INT)(i)}))
#endif
#define NULL_INTERVAL_P(i) (CHECK(!INT_LISPLIKE(i),"non-interval"),(i) == NULL_INTERVAL)
/* old #define NULL_INTERVAL_P(i) ((i) == NULL_INTERVAL || INT_LISPLIKE (i)) */
/* True if this interval has no right child. */
#define NULL_RIGHT_CHILD(i) ((i)->right == NULL_INTERVAL)
/* True if this interval has no left child. */
#define NULL_LEFT_CHILD(i) ((i)->left == NULL_INTERVAL)
/* True if this interval has no parent. */
#define NULL_PARENT(i) ((i)->up_obj || (i)->up.interval == 0)
/* True if this interval is the left child of some other interval. */
#define AM_LEFT_CHILD(i) (! NULL_PARENT (i) \
&& INTERVAL_PARENT (i)->left == (i))
/* True if this interval is the right child of some other interval. */
#define AM_RIGHT_CHILD(i) (! NULL_PARENT (i) \
&& INTERVAL_PARENT (i)->right == (i))
/* True if this interval has no children. */
#define LEAF_INTERVAL_P(i) ((i)->left == NULL_INTERVAL \
&& (i)->right == NULL_INTERVAL)
/* True if this interval has no parent and is therefore the root. */
#define ROOT_INTERVAL_P(i) (NULL_PARENT (i))
/* True if this interval is the only interval in the interval tree. */
#define ONLY_INTERVAL_P(i) (ROOT_INTERVAL_P ((i)) && LEAF_INTERVAL_P ((i)))
/* True if this interval has both left and right children. */
#define BOTH_KIDS_P(i) ((i)->left != NULL_INTERVAL \
&& (i)->right != NULL_INTERVAL)
/* The total size of all text represented by this interval and all its
children in the tree. This is zero if the interval is null. */
#define TOTAL_LENGTH(i) ((i) == NULL_INTERVAL ? 0 : (i)->total_length)
/* The size of text represented by this interval alone. */
#define LENGTH(i) ((i) == NULL_INTERVAL ? 0 : (TOTAL_LENGTH ((i)) \
- TOTAL_LENGTH ((i)->right) \
- TOTAL_LENGTH ((i)->left)))
/* The position of the character just past the end of I. Note that
the position cache i->position must be valid for this to work. */
#define INTERVAL_LAST_POS(i) ((i)->position + LENGTH ((i)))
/* The total size of the left subtree of this interval. */
#define LEFT_TOTAL_LENGTH(i) ((i)->left ? (i)->left->total_length : 0)
/* The total size of the right subtree of this interval. */
#define RIGHT_TOTAL_LENGTH(i) ((i)->right ? (i)->right->total_length : 0)
/* These macros are for dealing with the interval properties. */
/* True if this is a default interval, which is the same as being null
or having no properties. */
#define DEFAULT_INTERVAL_P(i) (NULL_INTERVAL_P (i) || EQ ((i)->plist, Qnil))
/* Test what type of parent we have. Three possibilities: another
interval, a buffer or string object, or NULL_INTERVAL. */
#define INTERVAL_HAS_PARENT(i) ((i)->up_obj == 0 && (i)->up.interval != 0)
#define INTERVAL_HAS_OBJECT(i) ((i)->up_obj)
/* Set/get parent of an interval.
The choice of macros is dependent on the type needed. Don't add
casts to get around this, it will break some development work in
progress. */
#define SET_INTERVAL_PARENT(i,p) (eassert (!INT_LISPLIKE (p)),(i)->up_obj = 0, (i)->up.interval = (p))
#define SET_INTERVAL_OBJECT(i,o) (eassert (!INTEGERP (o)), eassert (BUFFERP (o) || STRINGP (o)),(i)->up_obj = 1, (i)->up.obj = (o))
#define INTERVAL_PARENT(i) (eassert((i) != 0 && (i)->up_obj == 0),(i)->up.interval)
#define GET_INTERVAL_OBJECT(d,s) (eassert((s)->up_obj == 1), (d) = (s)->up.obj)
/* Make the parent of D be whatever the parent of S is, regardless of
type. This is used when balancing an interval tree. */
#define COPY_INTERVAL_PARENT(d,s) ((d)->up = (s)->up, (d)->up_obj = (s)->up_obj)
/* Get the parent interval, if any, otherwise a null pointer. Useful
for walking up to the root in a "for" loop; use this to get the
"next" value, and test the result to see if it's NULL_INTERVAL. */
#define INTERVAL_PARENT_OR_NULL(i) (INTERVAL_HAS_PARENT (i) ? INTERVAL_PARENT (i) : 0)
/* Reset this interval to its vanilla, or no-property state. */
#define RESET_INTERVAL(i) \
{ \
(i)->total_length = (i)->position = 0; \
(i)->left = (i)->right = NULL_INTERVAL; \
SET_INTERVAL_PARENT (i, NULL_INTERVAL); \
(i)->write_protect = 0; \
(i)->visible = 0; \
(i)->front_sticky = (i)->rear_sticky = 0; \
(i)->plist = Qnil; \
}
/* Copy the cached property values of interval FROM to interval TO. */
#define COPY_INTERVAL_CACHE(from,to) \
{ \
(to)->write_protect = (from)->write_protect; \
(to)->visible = (from)->visible; \
(to)->front_sticky = (from)->front_sticky; \
(to)->rear_sticky = (from)->rear_sticky; \
}
/* Copy only the set bits of FROM's cache. */
#define MERGE_INTERVAL_CACHE(from,to) \
{ \
if ((from)->write_protect) (to)->write_protect = 1; \
if ((from)->visible) (to)->visible = 1; \
if ((from)->front_sticky) (to)->front_sticky = 1; \
if ((from)->rear_sticky) (to)->rear_sticky = 1; \
}
/* Macro determining whether the properties of an interval being
inserted should be merged with the properties of the text where
they are being inserted. */
#define MERGE_INSERTIONS(i) 1
/* Macro determining if an invisible interval should be displayed
as a special glyph, or not at all. */
#define DISPLAY_INVISIBLE_GLYPH(i) 0
/* Is this interval visible? Replace later with cache access */
#define INTERVAL_VISIBLE_P(i) \
(! NULL_INTERVAL_P (i) && NILP (textget ((i)->plist, Qinvisible)))
/* Is this interval writable? Replace later with cache access */
#define INTERVAL_WRITABLE_P(i) \
(! NULL_INTERVAL_P (i) \
&& (NILP (textget ((i)->plist, Qread_only)) \
|| ((CONSP (Vinhibit_read_only) \
? !NILP (Fmemq (textget ((i)->plist, Qread_only), \
Vinhibit_read_only)) \
: !NILP (Vinhibit_read_only))))) \
/* Macros to tell whether insertions before or after this interval
should stick to it. */
/* Replace later with cache access */
/*#define FRONT_STICKY_P(i) ((i)->front_sticky != 0)
#define END_STICKY_P(i) ((i)->rear_sticky != 0)*/
/* As we now have Vtext_property_default_nonsticky, these macros are
unreliable now. Currently, they are never used. */
#define FRONT_STICKY_P(i) \
(! NULL_INTERVAL_P (i) && ! NILP (textget ((i)->plist, Qfront_sticky)))
#define END_NONSTICKY_P(i) \
(! NULL_INTERVAL_P (i) && ! NILP (textget ((i)->plist, Qrear_nonsticky)))
#define FRONT_NONSTICKY_P(i) \
(! NULL_INTERVAL_P (i) && ! EQ (Qt, textget ((i)->plist, Qfront_sticky)))
/* If PROP is the `invisible' property of a character,
this is 1 if the character should be treated as invisible,
and 2 if it is invisible but with an ellipsis. */
#define TEXT_PROP_MEANS_INVISIBLE(prop) \
(EQ (current_buffer->invisibility_spec, Qt) \
? !NILP (prop) \
: invisible_p (prop, current_buffer->invisibility_spec))
/* Declared in alloc.c */
extern INTERVAL make_interval P_ ((void));
/* Declared in intervals.c */
extern INTERVAL create_root_interval P_ ((Lisp_Object));
extern void copy_properties P_ ((INTERVAL, INTERVAL));
extern int intervals_equal P_ ((INTERVAL, INTERVAL));
extern void traverse_intervals P_ ((INTERVAL, int,
void (*) (INTERVAL, Lisp_Object),
Lisp_Object));
extern void traverse_intervals_noorder P_ ((INTERVAL,
void (*) (INTERVAL, Lisp_Object),
Lisp_Object));
extern INTERVAL split_interval_right P_ ((INTERVAL, int));
extern INTERVAL split_interval_left P_ ((INTERVAL, int));
extern INTERVAL find_interval P_ ((INTERVAL, int));
extern INTERVAL next_interval P_ ((INTERVAL));
extern INTERVAL previous_interval P_ ((INTERVAL));
extern INTERVAL merge_interval_left P_ ((INTERVAL));
extern INTERVAL merge_interval_right P_ ((INTERVAL));
extern void delete_interval P_ ((INTERVAL));
extern INLINE void offset_intervals P_ ((struct buffer *, int, int));
extern void graft_intervals_into_buffer P_ ((INTERVAL, int, int,
struct buffer *, int));
extern void set_point P_ ((struct buffer *, int));
extern INLINE void temp_set_point P_ ((struct buffer *, int));
extern void set_point_both P_ ((struct buffer *, int, int));
extern INLINE void temp_set_point_both P_ ((struct buffer *, int, int));
extern void verify_interval_modification P_ ((struct buffer *, int, int));
extern INTERVAL balance_intervals P_ ((INTERVAL));
extern INLINE void copy_intervals_to_string P_ ((Lisp_Object, struct buffer *,
int, int));
extern INTERVAL copy_intervals P_ ((INTERVAL, int, int));
extern Lisp_Object textget P_ ((Lisp_Object, Lisp_Object));
extern Lisp_Object lookup_char_property P_ ((Lisp_Object, Lisp_Object, int));
extern void move_if_not_intangible P_ ((int));
extern int get_property_and_range P_ ((int, Lisp_Object, Lisp_Object *,
int *, int *, Lisp_Object));
extern Lisp_Object get_local_map P_ ((int, struct buffer *, Lisp_Object));
extern INTERVAL update_interval P_ ((INTERVAL, int));
extern void set_intervals_multibyte P_ ((int));
extern INTERVAL validate_interval_range P_ ((Lisp_Object, Lisp_Object *,
Lisp_Object *, int));
/* Defined in xdisp.c */
extern int invisible_p P_ ((Lisp_Object, Lisp_Object));
/* Declared in textprop.c */
/* Types of hooks. */
extern Lisp_Object Qmouse_left;
extern Lisp_Object Qmouse_entered;
extern Lisp_Object Qpoint_left;
extern Lisp_Object Qpoint_entered;
extern Lisp_Object Qmodification_hooks;
extern Lisp_Object Qcategory;
extern Lisp_Object Qlocal_map;
extern Lisp_Object Qkeymap;
/* Visual properties text (including strings) may have. */
extern Lisp_Object Qforeground, Qbackground, Qfont, Qunderline, Qstipple;
extern Lisp_Object Qinvisible, Qintangible, Qread_only;
extern Lisp_Object Vinhibit_point_motion_hooks;
extern Lisp_Object Vdefault_text_properties;
extern Lisp_Object Vchar_property_alias_alist;
extern Lisp_Object Vtext_property_default_nonsticky;
/* Sticky properties */
extern Lisp_Object Qfront_sticky, Qrear_nonsticky;
EXFUN (Fget_char_property, 3);
EXFUN (Fget_text_property, 3);
EXFUN (Ftext_properties_at, 2);
EXFUN (Fnext_property_change, 3);
EXFUN (Fprevious_property_change, 3);
EXFUN (Fadd_text_properties, 4);
EXFUN (Fset_text_properties, 4);
EXFUN (Fremove_text_properties, 4);
EXFUN (Ftext_property_any, 5);
EXFUN (Ftext_property_not_all, 5);
EXFUN (Fprevious_single_char_property_change, 4);
extern Lisp_Object copy_text_properties P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object));
extern Lisp_Object set_text_properties P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object,
Lisp_Object));
extern void set_text_properties_1 P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object, INTERVAL));
Lisp_Object text_property_list P_ ((Lisp_Object, Lisp_Object, Lisp_Object,
Lisp_Object));
int add_text_properties_from_list P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
void extend_property_ranges P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
Lisp_Object get_char_property_and_overlay P_ ((Lisp_Object, Lisp_Object,
Lisp_Object, Lisp_Object*));
extern int text_property_stickiness P_ ((Lisp_Object prop, Lisp_Object pos));
extern void syms_of_textprop ();
#include "composite.h"
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