[fcformat] Add value-count syntax
The format '%{#family}' expands to the number of values for the element 'family', or '0' if no such element exists in the pattern.
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116
src/fcformat.c
116
src/fcformat.c
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@ -1,5 +1,5 @@
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/*
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* Copyright © 2008 Red Hat, Inc.
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* Copyright © 2008,2009 Red Hat, Inc.
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*
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* Red Hat Author(s): Behdad Esfahbod
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*
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@ -31,7 +31,6 @@
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/*
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* Some ideas for future syntax extensions:
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*
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* - number of values for element using '%{#elt}'
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* - allow indexing subexprs using '%{[idx]elt1,elt2{subexpr}}'
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* - allow indexing simple tags using '%{elt[idx]}'
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* - conditional/filtering/deletion on binding (using '(w)'/'(s)' notation)
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@ -260,45 +259,6 @@ maybe_skip_subexpr (FcFormatContext *c)
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FcTrue;
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}
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static FcBool
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interpret_simple (FcFormatContext *c,
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FcPattern *pat,
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FcStrBuf *buf)
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{
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FcPatternElt *e;
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FcBool add_colon = FcFalse;
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FcBool add_elt_name = FcFalse;
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if (consume_char (c, ':'))
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add_colon = FcTrue;
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if (!read_word (c))
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return FcFalse;
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if (consume_char (c, '='))
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add_elt_name = FcTrue;
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e = FcPatternObjectFindElt (pat,
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FcObjectFromName ((const char *) c->word));
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if (e)
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{
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FcValueListPtr l;
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if (add_colon)
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FcStrBufChar (buf, ':');
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if (add_elt_name)
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{
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FcStrBufString (buf, c->word);
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FcStrBufChar (buf, '=');
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}
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l = FcPatternEltValues(e);
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FcNameUnparseValueList (buf, l, '\0');
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}
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return FcTrue;
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}
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static FcBool
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interpret_filter (FcFormatContext *c,
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FcPattern *pat,
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@ -415,6 +375,79 @@ interpret_cond (FcFormatContext *c,
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return FcTrue;
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}
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static FcBool
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interpret_count (FcFormatContext *c,
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FcPattern *pat,
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FcStrBuf *buf)
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{
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int count;
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FcPatternElt *e;
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FcChar8 buf_static[64];
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if (!expect_char (c, '#'))
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return FcFalse;
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if (!read_word (c))
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return FcFalse;
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count = 0;
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e = FcPatternObjectFindElt (pat,
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FcObjectFromName ((const char *) c->word));
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if (e)
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{
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FcValueListPtr l;
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count++;
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for (l = FcPatternEltValues(e);
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l->next;
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l = l->next)
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count++;
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}
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snprintf (buf_static, sizeof (buf_static), "%d", count);
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FcStrBufString (buf, buf_static);
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return FcTrue;
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}
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static FcBool
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interpret_simple (FcFormatContext *c,
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FcPattern *pat,
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FcStrBuf *buf)
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{
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FcPatternElt *e;
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FcBool add_colon = FcFalse;
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FcBool add_elt_name = FcFalse;
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if (consume_char (c, ':'))
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add_colon = FcTrue;
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if (!read_word (c))
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return FcFalse;
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if (consume_char (c, '='))
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add_elt_name = FcTrue;
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e = FcPatternObjectFindElt (pat,
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FcObjectFromName ((const char *) c->word));
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if (e)
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{
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FcValueListPtr l;
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if (add_colon)
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FcStrBufChar (buf, ':');
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if (add_elt_name)
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{
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FcStrBufString (buf, c->word);
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FcStrBufChar (buf, '=');
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}
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l = FcPatternEltValues(e);
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FcNameUnparseValueList (buf, l, '\0');
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}
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return FcTrue;
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}
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static FcChar8 *
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cescape (const FcChar8 *str)
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{
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@ -593,6 +626,7 @@ interpret_percent (FcFormatContext *c,
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case '+': ret = interpret_filter (c, pat, buf); break;
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case '-': ret = interpret_delete (c, pat, buf); break;
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case '?': ret = interpret_cond (c, pat, buf); break;
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case '#': ret = interpret_count (c, pat, buf); break;
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default: ret = interpret_simple (c, pat, buf); break;
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}
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