#include <stdarg.h>
+/* XXX Document the language.
+ *
+ * These are mostly the features implemented but not documented:
+ *
+ * width %[[-]width]{tag}
+ * index %{tag[ids]}
+ * name= %{tag=|decorator}
+ * :name= %{:tag=|decorator}
+ * subexpr %{{expr}|decorator1|decorator2}
+ * delete %{-charset,lang{expr}|decorator}
+ * filter %{+family,familylang{expr}|decorator}
+ * cond %{?tag1,tag2,!tag3{}{}}
+ * decorat %{tag|decorator1|decorator2}
+ * default %{parameter:-word}
+ * array %{[]family,familylang{expr}|decorator}
+ * langset enumeration using the same syntax as arrays
+ *
+ * filters:
+ * basename FcStrBasename
+ * dirname FcStrDirname
+ * downcase FcStrDowncase
+ * shescape
+ * cescape
+ * xmlescape
+ * delete delete chars
+ * escape escape chars
+ * translate translate chars
+ *
+ * builtins:
+ * unparse
+ * fcmatch
+ * fclist
+ * pkgkit
+ */
+
/*
* Some ideas for future syntax extensions:
*
* - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}'
- * - allow indexing simple tags using '%{elt[idx]}'
* - conditional/filtering/deletion on binding (using '(w)'/'(s)'/'(=)' notation)
*/
+
+#define FCMATCH_FORMAT "%{file:-<unknown filename>|basename}: \"%{family[0]:-<unknown family>}\" \"%{style[0]:-<unknown style>}\""
+#define FCLIST_FORMAT "%{?file{%{file}: }}%{=unparse}"
+#define PKGKIT_FORMAT "%{[]family{font(%{family|downcase|delete( )})\n}}%{[]lang{font(:lang=%{lang|downcase|translate(_,-)})\n}}"
+
+
static void
message (const char *fmt, ...)
{
return FcTrue;
}
+static FcBool
+FcPatternFormatToBuf (FcPattern *pat,
+ const FcChar8 *format,
+ FcStrBuf *buf);
+
static FcBool
interpret_builtin (FcFormatContext *c,
FcPattern *pat,
FcStrBuf *buf)
{
- if (!expect_char (c, '='))
- return FcFalse;
+ FcChar8 *new_str;
+ FcBool ret;
- if (!read_word (c))
+ if (!expect_char (c, '=') ||
+ !read_word (c))
return FcFalse;
+
+ /* try simple builtins first */
+ if (0) { }
#define BUILTIN(name, func) \
else if (0 == strcmp ((const char *) c->word, name))\
- return func (c, pat, buf)
-#if 0
- BUILTIN ("unparse", FcNameUnparse);
- BUILTIN ("verbose", FcPatternPrint);
- BUILTIN2 ("fcmatch", FcStrDirname);
- BUILTIN2 ("fclist", FcStrDirname);
- BUILTIN2 ("pkgkit", FcStrDirname);
-#endif
-
- message ("unknown builtin \"%s\"",
- c->word);
- return FcFalse;
+ do { new_str = func (pat); ret = FcTrue; } while (0)
+ BUILTIN ("unparse", FcNameUnparse);
+ /* BUILTIN ("verbose", FcPatternPrint); XXX */
+#undef BUILTIN
+ else
+ ret = FcFalse;
+
+ if (ret)
+ {
+ if (new_str)
+ {
+ FcStrBufString (buf, new_str);
+ free (new_str);
+ return FcTrue;
+ }
+ else
+ return FcFalse;
+ }
+
+ /* now try our custom formats */
+ if (0) { }
+#define BUILTIN(name, format) \
+ else if (0 == strcmp ((const char *) c->word, name))\
+ ret = FcPatternFormatToBuf (pat, (const FcChar8 *) format, buf)
+ BUILTIN ("fcmatch", FCMATCH_FORMAT);
+ BUILTIN ("fclist", FCLIST_FORMAT);
+ BUILTIN ("pkgkit", PKGKIT_FORMAT);
+#undef BUILTIN
+ else
+ ret = FcFalse;
+
+ if (!ret)
+ message ("unknown builtin \"%s\"",
+ c->word);
+
+ return ret;
}
static FcBool
pass = pass &&
(negate ^
- (FcResultMatch == FcPatternGet (pat,
- (const char *) c->word,
- 0, &v)));
+ (FcResultMatch ==
+ FcPatternGet (pat, (const char *) c->word, 0, &v)));
}
while (consume_char (c, ','));
return FcTrue;
}
+static FcBool
+interpret_array (FcFormatContext *c,
+ FcPattern *pat,
+ FcStrBuf *buf)
+{
+ FcObjectSet *os;
+ FcPattern *subpat;
+ const FcChar8 *format_save;
+ int idx;
+ FcBool ret, done;
+ FcStrList *lang_strs;
+
+ if (!expect_char (c, '[') ||
+ !expect_char (c, ']'))
+ return FcFalse;
+
+ os = FcObjectSetCreate ();
+ if (!os)
+ return FcFalse;
+
+ ret = FcTrue;
+
+ do
+ {
+ if (!read_word (c) ||
+ !FcObjectSetAdd (os, (const char *) c->word))
+ {
+ FcObjectSetDestroy (os);
+ return FcFalse;
+ }
+ }
+ while (consume_char (c, ','));
+
+ /* If we have one element and it's of type FcLangSet, we want
+ * to enumerate the languages in it. */
+ lang_strs = NULL;
+ if (os->nobject == 1)
+ {
+ FcLangSet *langset;
+ if (FcResultMatch ==
+ FcPatternGetLangSet (pat, os->objects[0], idx, &langset))
+ {
+ FcStrSet *ss;
+ if (!(ss = FcLangSetGetLangs (langset)) ||
+ !(lang_strs = FcStrListCreate (ss)))
+ goto bail0;
+ }
+ }
+
+ subpat = FcPatternDuplicate (pat);
+ if (!subpat)
+ goto bail0;
+
+ format_save = c->format;
+ idx = 0;
+ do
+ {
+ int i;
+
+ done = FcTrue;
+
+ if (lang_strs)
+ {
+ FcChar8 *lang;
+
+ FcPatternDel (subpat, os->objects[0]);
+ if ((lang = FcStrListNext (lang_strs)))
+ {
+ FcPatternAddString (subpat, os->objects[0], lang);
+ done = FcFalse;
+ }
+ }
+ else
+ {
+ for (i = 0; i < os->nobject; i++)
+ {
+ FcValue v;
+
+ /* XXX this can be optimized by accessing valuelist linked lists
+ * directly and remembering where we were. Most (all) value lists
+ * in normal uses are pretty short though (language tags are
+ * stored as a LangSet, not separate values.). */
+ FcPatternDel (subpat, os->objects[i]);
+ if (FcResultMatch ==
+ FcPatternGet (pat, os->objects[i], idx, &v))
+ {
+ FcPatternAdd (subpat, os->objects[i], v, FcFalse);
+ done = FcFalse;
+ }
+ }
+ }
+
+ if (!done)
+ {
+ c->format = format_save;
+ ret = interpret_subexpr (c, subpat, buf);
+ if (!ret)
+ goto bail;
+ }
+
+ idx++;
+ } while (!done);
+
+ if (c->format == format_save)
+ skip_subexpr (c);
+
+bail:
+ FcPatternDestroy (subpat);
+bail0:
+ if (lang_strs)
+ FcStrListDone (lang_strs);
+ FcObjectSetDestroy (os);
+
+ return ret;
+}
+
static FcBool
interpret_simple (FcFormatContext *c,
FcPattern *pat,
FcPatternElt *e;
FcBool add_colon = FcFalse;
FcBool add_elt_name = FcFalse;
+ int idx;
+ FcChar8 *else_string;
if (consume_char (c, ':'))
add_colon = FcTrue;
if (!read_word (c))
return FcFalse;
+ idx = -1;
+ if (consume_char (c, '['))
+ {
+ idx = strtol ((const char *) c->format, (char **) &c->format, 10);
+ if (idx < 0)
+ {
+ message ("expected non-negative number at %d",
+ c->format-1 - c->format_orig + 1);
+ return FcFalse;
+ }
+ if (!expect_char (c, ']'))
+ return FcFalse;
+ }
+
if (consume_char (c, '='))
add_elt_name = FcTrue;
+ /* modifiers */
+ else_string = NULL;
+ if (consume_char (c, ':'))
+ {
+ FcChar8 *orig;
+ /* divert the c->word for now */
+ orig = c->word;
+ c->word = c->word + strlen ((const char *) c->word) + 1;
+ /* for now we just support 'default value' */
+ if (!expect_char (c, '-') ||
+ !read_chars (c, '\0'))
+ {
+ c->word = orig;
+ return FcFalse;
+ }
+ else_string = c->word;
+ c->word = orig;
+ }
+
e = FcPatternObjectFindElt (pat,
FcObjectFromName ((const char *) c->word));
if (e)
}
l = FcPatternEltValues(e);
- FcNameUnparseValueList (buf, l, '\0');
+
+ if (idx != -1)
+ {
+ while (l && idx > 0)
+ {
+ l = FcValueListNext(l);
+ idx--;
+ }
+ if (l && idx == 0)
+ {
+ if (!FcNameUnparseValue (buf, &l->value, '\0'))
+ return FcFalse;
+ }
+ else goto notfound;
+ }
+ else
+ {
+ FcNameUnparseValueList (buf, l, '\0');
+ }
+ }
+ else
+notfound:
+ {
+ if (else_string)
+ printf ("%s", else_string);
}
return FcTrue;
static FcBool
cescape (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
while(*str)
{
static FcBool
shescape (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
FcStrBufChar (buf, '\'');
while(*str)
static FcBool
xmlescape (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
while(*str)
{
static FcBool
delete_chars (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
/* XXX not UTF-8 aware */
static FcBool
escape_chars (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
/* XXX not UTF-8 aware */
static FcBool
translate_chars (FcFormatContext *c,
- FcStrBuf *buf,
- const FcChar8 *str)
+ const FcChar8 *str,
+ FcStrBuf *buf)
{
char *from, *to, repeat;
int from_len, to_len;
from_len = strlen (from);
to = from + from_len + 1;
- /* hack: we temporarily diverge c->word */
+ /* hack: we temporarily divert c->word */
c->word = (FcChar8 *) to;
if (!read_chars (c, ')'))
{
FcChar8 buf_static[8192];
FcBool ret;
- if (!expect_char (c, '|'))
+ if (!expect_char (c, '|') ||
+ !read_word (c))
return FcFalse;
- /* nul-terminate the buffer */
+ /* prepare the buffer */
FcStrBufChar (buf, '\0');
if (buf->failed)
return FcFalse;
str = buf->buf + start;
buf->len = start;
- if (!read_word (c))
- return FcFalse;
-
/* try simple converters first */
if (0) { }
#define CONVERTER(name, func) \
{
if (new_str)
{
- /* replace in the buffer */
FcStrBufString (buf, new_str);
free (new_str);
return FcTrue;
if (0) { }
#define CONVERTER(name, func) \
else if (0 == strcmp ((const char *) c->word, name))\
- ret = func (c, &new_buf, str)
+ ret = func (c, str, &new_buf)
CONVERTER ("cescape", cescape);
CONVERTER ("shescape", shescape);
CONVERTER ("xmlescape", xmlescape);
case '-': ret = interpret_delete (c, pat, buf); break;
case '?': ret = interpret_cond (c, pat, buf); break;
case '#': ret = interpret_count (c, pat, buf); break;
+ case '[': ret = interpret_array (c, pat, buf); break;
default: ret = interpret_simple (c, pat, buf); break;
}
return FcTrue;
}
+static FcBool
+FcPatternFormatToBuf (FcPattern *pat,
+ const FcChar8 *format,
+ FcStrBuf *buf)
+{
+ FcFormatContext c;
+ FcChar8 word_static[1024];
+ FcBool ret;
+
+ if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static)))
+ return FcFalse;
+
+ ret = interpret_expr (&c, pat, buf, '\0');
+
+ FcFormatContextDone (&c);
+
+ return ret;
+}
+
FcChar8 *
-FcPatternFormat (FcPattern *pat, const FcChar8 *format)
+FcPatternFormat (FcPattern *pat,
+ const FcChar8 *format)
{
FcStrBuf buf;
- FcChar8 word_static[1024];
FcChar8 buf_static[8192 - 1024];
- FcFormatContext c;
FcBool ret;
FcStrBufInit (&buf, buf_static, sizeof (buf_static));
- if (!FcFormatContextInit (&c, format, word_static, sizeof (word_static)))
- return NULL;
- ret = interpret_expr (&c, pat, &buf, '\0');
+ ret = FcPatternFormatToBuf (pat, format, &buf);
- FcFormatContextDone (&c);
if (ret)
return FcStrBufDone (&buf);
else
git.wh0rd.org / fontconfig.git / blobdiff