Copyright (C) 1992, 1995 Free Software Foundation, Inc.
Copyright (C) 1995 Sun Microsystems, Inc.
Copyright (C) 1995, 1996 Ben Wing.
+ Copyright (C) 1995, 1997, 1999 Electrotechnical Laboratory, JAPAN.
+ Licensed to the Free Software Foundation.
This file is part of XEmacs.
#include <config.h>
#include "lisp.h"
+#include <stddef.h>
#include "buffer.h"
#include "chartab.h"
Lisp_Object Qcategory_table_value_p;
Lisp_Object Vstandard_category_table;
+
+/* Variables to determine word boundary. */
+Lisp_Object Vword_combining_categories, Vword_separating_categories;
#endif /* MULE */
\f
return internal_array_hash (cte->level2, 96, depth);
}
+static const struct lrecord_description char_table_entry_description[] = {
+ { XD_LISP_OBJECT, offsetof(struct Lisp_Char_Table_Entry, level2), 96 },
+ { XD_END }
+};
+
DEFINE_LRECORD_IMPLEMENTATION ("char-table-entry", char_table_entry,
mark_char_table_entry, internal_object_printer,
0, char_table_entry_equal,
char_table_entry_hash,
+ char_table_entry_description,
struct Lisp_Char_Table_Entry);
#endif /* MULE */
return hashval;
}
+static const struct lrecord_description char_table_description[] = {
+ { XD_LISP_OBJECT, offsetof(struct Lisp_Char_Table, ascii), NUM_ASCII_CHARS },
+#ifdef MULE
+ { XD_LISP_OBJECT, offsetof(struct Lisp_Char_Table, level1), NUM_LEADING_BYTES },
+#endif
+ { XD_END }
+};
+
DEFINE_LRECORD_IMPLEMENTATION ("char-table", char_table,
mark_char_table, print_char_table, 0,
char_table_equal, char_table_hash,
+ char_table_description,
struct Lisp_Char_Table);
DEFUN ("char-table-p", Fchar_table_p, 1, 1, 0, /*
return CATEGORY_TABLE_VALUEP (obj) ? Qt : Qnil;
}
+
+#define CATEGORYP(x) \
+ (CHARP ((x)) && XCHAR ((x)) >= 0x20 && XCHAR ((x)) <= 0x7E)
+
+#define CATEGORY_SET(c) \
+ (get_char_table(c, XCHAR_TABLE(current_buffer->category_table)))
+
+/* Return 1 if CATEGORY_SET contains CATEGORY, else return 0.
+ The faster version of `!NILP (Faref (category_set, category))'. */
+#define CATEGORY_MEMBER(category, category_set) \
+ (bit_vector_bit(XBIT_VECTOR (category_set), category - 32))
+
+/* Return 1 if there is a word boundary between two word-constituent
+ characters C1 and C2 if they appear in this order, else return 0.
+ Use the macro WORD_BOUNDARY_P instead of calling this function
+ directly. */
+
+int
+word_boundary_p (Emchar c1, Emchar c2)
+{
+ Lisp_Object category_set1, category_set2;
+ Lisp_Object tail;
+ int default_result;
+
+#if 0
+ if (COMPOSITE_CHAR_P (c1))
+ c1 = cmpchar_component (c1, 0, 1);
+ if (COMPOSITE_CHAR_P (c2))
+ c2 = cmpchar_component (c2, 0, 1);
+#endif
+
+ if (EQ (CHAR_CHARSET (c1), CHAR_CHARSET (c2)))
+ {
+ tail = Vword_separating_categories;
+ default_result = 0;
+ }
+ else
+ {
+ tail = Vword_combining_categories;
+ default_result = 1;
+ }
+
+ category_set1 = CATEGORY_SET (c1);
+ if (NILP (category_set1))
+ return default_result;
+ category_set2 = CATEGORY_SET (c2);
+ if (NILP (category_set2))
+ return default_result;
+
+ for (; CONSP (tail); tail = XCONS (tail)->cdr)
+ {
+ Lisp_Object elt = XCONS(tail)->car;
+
+ if (CONSP (elt)
+ && CATEGORYP (XCONS (elt)->car)
+ && CATEGORYP (XCONS (elt)->cdr)
+ && CATEGORY_MEMBER (XCHAR (XCONS (elt)->car), category_set1)
+ && CATEGORY_MEMBER (XCHAR (XCONS (elt)->cdr), category_set2))
+ return !default_result;
+ }
+ return default_result;
+}
#endif /* MULE */
\f
Vstandard_category_table = Qnil;
Vstandard_category_table = Fcopy_category_table (Qnil);
staticpro (&Vstandard_category_table);
+
+ DEFVAR_LISP ("word-combining-categories", &Vword_combining_categories /*
+List of pair (cons) of categories to determine word boundary.
+
+Emacs treats a sequence of word constituent characters as a single
+word (i.e. finds no word boundary between them) iff they belongs to
+the same charset. But, exceptions are allowed in the following cases.
+
+(1) The case that characters are in different charsets is controlled
+by the variable `word-combining-categories'.
+
+Emacs finds no word boundary between characters of different charsets
+if they have categories matching some element of this list.
+
+More precisely, if an element of this list is a cons of category CAT1
+and CAT2, and a multibyte character C1 which has CAT1 is followed by
+C2 which has CAT2, there's no word boundary between C1 and C2.
+
+For instance, to tell that ASCII characters and Latin-1 characters can
+form a single word, the element `(?l . ?l)' should be in this list
+because both characters have the category `l' (Latin characters).
+
+(2) The case that character are in the same charset is controlled by
+the variable `word-separating-categories'.
+
+Emacs find a word boundary between characters of the same charset
+if they have categories matching some element of this list.
+
+More precisely, if an element of this list is a cons of category CAT1
+and CAT2, and a multibyte character C1 which has CAT1 is followed by
+C2 which has CAT2, there's a word boundary between C1 and C2.
+
+For instance, to tell that there's a word boundary between Japanese
+Hiragana and Japanese Kanji (both are in the same charset), the
+element `(?H . ?C) should be in this list.
+*/ );
+
+ Vword_combining_categories = Qnil;
+
+ DEFVAR_LISP ("word-separating-categories", &Vword_separating_categories /*
+List of pair (cons) of categories to determine word boundary.
+See the documentation of the variable `word-combining-categories'.
+*/ );
+
+ Vword_separating_categories = Qnil;
#endif /* MULE */
}
projects / chise / xemacs-chise.git.1 / blobdiff