The former is a hash table in which keys are COMPONENTS-VECs and
values are the corresponding COMPOSITION-IDs. This hash table is
- weak, but as each key (COMPONENTS-VEC) is also kept as a value of
+ weak, but as each key (COMPONENTS-VEC) is also kept as a value of the
`composition' property, it won't be collected as garbage until all
- text that have the same COMPONENTS-VEC are deleted.
+ bits of text that have the same COMPONENTS-VEC are deleted.
The latter is a table of pointers to `struct composition' indexed
- by COMPOSITION-ID. This structure keep the other information (see
+ by COMPOSITION-ID. This structure keeps the other information (see
composite.h).
In general, a text property holds information about individual
characters. But, a `composition' property holds information about
- a sequence of characters (in this sense, it is like `intangible'
+ a sequence of characters (in this sense, it is like the `intangible'
property). That means that we should not share the property value
- in adjacent compositions we can't distinguish them if they have the
+ in adjacent compositions -- we can't distinguish them if they have the
same property. So, after any changes, we call
`update_compositions' and change a property of one of adjacent
compositions to a copy of it. This function also runs a proper
composition modification function to make a composition that gets
invalid by the change valid again.
- As a value of `composition' property holds information about a
+ As the value of the `composition' property holds information about a
specific range of text, the value gets invalid if we change the
- text in the range. We treat `composition' property always
+ text in the range. We treat the `composition' property as always
rear-nonsticky (currently by setting default-text-properties to
(rear-nonsticky (composition))) and we never make properties of
adjacent compositions identical. Thus, any such changes make the
- range just shorter. So, we can check the validity of `composition'
+ range just shorter. So, we can check the validity of the `composition'
property by comparing LENGTH information with the actual length of
the composition.
#define CHAR_WIDTH(c) \
(SINGLE_BYTE_CHAR_P (c) ? 1 : CHARSET_WIDTH (CHAR_CHARSET (c)))
-/* The following macros for hash table are copied from fns.c. */
-/* Value is the key part of entry IDX in hash table H. */
-#define HASH_KEY(H, IDX) AREF ((H)->key_and_value, 2 * (IDX))
-/* Value is the value part of entry IDX in hash table H. */
-#define HASH_VALUE(H, IDX) AREF ((H)->key_and_value, 2 * (IDX) + 1)
-
/* Return COMPOSITION-ID of a composition at buffer position
CHARPOS/BYTEPOS and length NCHARS. The `composition' property of
the sequence is PROP. STRING, if non-nil, is a string that
&& find_composition (to, -1, &start, &end, &prop, Qnil)
&& !COMPOSITION_VALID_P (start, end, prop))
to = end;
- if (!NILP (func))
+ if (!NILP (Ffboundp (func)))
call2 (func, make_number (from), make_number (to));
else if (!NILP (Ffboundp (Vcompose_chars_after_function)))
call3 (Vcompose_chars_after_function,
void
update_compositions (from, to, check_mask)
- int from, to;
+ int from, to, check_mask;
{
Lisp_Object prop;
int start, end;
/* Set to nonzero if we don't have to compose ASCII characters. */
int skip_ascii;
int i, len, stop, c;
- unsigned char *ptr, *pend;
+ const unsigned char *ptr, *pend;
if (! CHAR_TABLE_P (Vcomposition_function_table))
return;
if (STRINGP (string))
{
- count = specpdl_ptr - specpdl;
+ count = SPECPDL_INDEX ();
GCPRO1 (string);
stop = end;
- ptr = XSTRING (string)->data + string_char_to_byte (string, start);
- pend = ptr + STRING_BYTES (XSTRING (string));
+ ptr = SDATA (string) + string_char_to_byte (string, start);
+ pend = ptr + SBYTES (string);
}
else
{
break;
stop = end;
if (STRINGP (string))
- ptr = XSTRING (string)->data + string_char_to_byte (string, start);
+ ptr = SDATA (string) + string_char_to_byte (string, start);
else
ptr = CHAR_POS_ADDR (start);
}
{
start += XINT (val);
if (STRINGP (string))
- ptr = XSTRING (string)->data + string_char_to_byte (string, start);
+ ptr = SDATA (string) + string_char_to_byte (string, start);
else
ptr = CHAR_POS_ADDR (start);
}
DEFUN ("compose-region-internal", Fcompose_region_internal,
Scompose_region_internal, 2, 4, 0,
- "Internal use only.\n\
-\n\
-Compose text in the region between START and END.\n\
-Optional 3rd and 4th arguments are COMPONENTS and MODIFICATION-FUNC\n\
-for the composition. See `compose-region' for more detial.")
- (start, end, components, mod_func)
+ doc: /* Internal use only.
+
+Compose text in the region between START and END.
+Optional 3rd and 4th arguments are COMPONENTS and MODIFICATION-FUNC
+for the composition. See `compose-region' for more detail. */)
+ (start, end, components, mod_func)
Lisp_Object start, end, components, mod_func;
{
validate_region (&start, &end);
&& !INTEGERP (components)
&& !CONSP (components)
&& !STRINGP (components))
- CHECK_VECTOR (components, 2);
+ CHECK_VECTOR (components);
compose_text (XINT (start), XINT (end), components, mod_func, Qnil);
return Qnil;
DEFUN ("compose-string-internal", Fcompose_string_internal,
Scompose_string_internal, 3, 5, 0,
- "Internal use only.\n\
-\n\
-Compose text between indices START and END of STRING.\n\
-Optional 4th and 5th arguments are COMPONENTS and MODIFICATION-FUNC\n\
-for the composition. See `compose-string' for more detial.")
- (string, start, end, components, mod_func)
+ doc: /* Internal use only.
+
+Compose text between indices START and END of STRING.
+Optional 4th and 5th arguments are COMPONENTS and MODIFICATION-FUNC
+for the composition. See `compose-string' for more detail. */)
+ (string, start, end, components, mod_func)
Lisp_Object string, start, end, components, mod_func;
{
- CHECK_STRING (string, 0);
- CHECK_NUMBER (start, 1);
- CHECK_NUMBER (end, 2);
+ CHECK_STRING (string);
+ CHECK_NUMBER (start);
+ CHECK_NUMBER (end);
if (XINT (start) < 0 ||
XINT (start) > XINT (end)
- || XINT (end) > XSTRING (string)->size)
+ || XINT (end) > SCHARS (string))
args_out_of_range (start, end);
compose_text (XINT (start), XINT (end), components, mod_func, string);
DEFUN ("find-composition-internal", Ffind_composition_internal,
Sfind_composition_internal, 4, 4, 0,
- "Internal use only.\n\
-\n\
-Return information about composition at or nearest to position POS.\n\
-See `find-composition' for more detail.")
- (pos, limit, string, detail_p)
+ doc: /* Internal use only.
+
+Return information about composition at or nearest to position POS.
+See `find-composition' for more detail. */)
+ (pos, limit, string, detail_p)
Lisp_Object pos, limit, string, detail_p;
{
Lisp_Object prop, tail;
int start, end;
int id;
- CHECK_NUMBER_COERCE_MARKER (pos, 0);
+ CHECK_NUMBER_COERCE_MARKER (pos);
start = XINT (pos);
if (!NILP (limit))
{
- CHECK_NUMBER_COERCE_MARKER (limit, 1);
+ CHECK_NUMBER_COERCE_MARKER (limit);
end = XINT (limit);
}
else
if (!NILP (string))
{
- CHECK_STRING (string, 2);
- if (XINT (pos) < 0 || XINT (pos) > XSTRING (string)->size)
+ CHECK_STRING (string);
+ if (XINT (pos) < 0 || XINT (pos) > SCHARS (string))
args_out_of_range (string, pos);
}
else
args[0] = QCtest;
args[1] = Qequal;
args[2] = QCweakness;
- args[3] = Qnil;
+ args[3] = Qt;
args[4] = QCsize;
args[5] = make_number (311);
composition_hash_table = Fmake_hash_table (6, args);
= Fcons (Fcons (Qcomposition, Qt), Vtext_property_default_nonsticky);
DEFVAR_LISP ("compose-chars-after-function", &Vcompose_chars_after_function,
- "Function to adjust composition of buffer text.\n\
-\n\
-The function is called with three arguments FROM, TO, and OBJECT.\n\
-FROM and TO specify the range of text of which composition should be\n\
-adjusted. OBJECT, if non-nil, is a string that contains the text.\n\
-\n\
-This function is called after a text with `composition' property is\n\
-inserted or deleted to keep `composition' property of buffer text\n\
-valid.\n\
-\n\
-The default value is the function `compose-chars-after'.");
+ doc: /* Function to adjust composition of buffer text.
+
+The function is called with three arguments FROM, TO, and OBJECT.
+FROM and TO specify the range of text of which composition should be
+adjusted. OBJECT, if non-nil, is a string that contains the text.
+
+This function is called after a text with `composition' property is
+inserted or deleted to keep `composition' property of buffer text
+valid.
+
+The default value is the function `compose-chars-after'. */);
Vcompose_chars_after_function = intern ("compose-chars-after");
Qcomposition_function_table = intern ("composition-function-table");
Fput (Qcomposition_function_table, Qchar_table_extra_slots, make_number (0));
DEFVAR_LISP ("composition-function-table", &Vcomposition_function_table,
- "Char table of patterns and functions to make a composition.\n\
-\n\
-Each element is nil or an alist of PATTERNs vs FUNCs, where PATTERNs\n\
-are regular expressions and FUNCs are functions. FUNC is responsible\n\
-for composing text matching the corresponding PATTERN. FUNC is called\n\
-with three arguments FROM, TO, and PATTERN. See the function\n\
-`compose-chars-after' for more detail.\n\
-\n\
-This table is looked up by the first character of a composition when\n\
-the composition gets invalid after a change in a buffer.");
+ doc: /* Char table of patterns and functions to make a composition.
+
+Each element is nil or an alist of PATTERNs vs FUNCs, where PATTERNs
+are regular expressions and FUNCs are functions. FUNC is responsible
+for composing text matching the corresponding PATTERN. FUNC is called
+with three arguments FROM, TO, and PATTERN. See the function
+`compose-chars-after' for more detail.
+
+This table is looked up by the first character of a composition when
+the composition gets invalid after a change in a buffer. */);
Vcomposition_function_table
= Fmake_char_table (Qcomposition_function_table, Qnil);