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Boilerplate needed for implementing range-to-rect.

This commit is contained in:
Pietro Gagliardi 2017-02-05 20:42:52 -05:00
parent c336063b65
commit b18cc88dce
3 changed files with 22 additions and 4 deletions
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13
common/attrstr.c
View File

@ -315,11 +315,24 @@ size_t attrstrUTF16Len(uiAttributedString *s)
return s->u16len;
}
// TODO is this still needed given the below?
size_t attrstrUTF8ToUTF16(uiAttributedString *s, size_t n)
{
return s->u8tou16[n];
}
size_t *attrstrCopyUTF8ToUTF16(uiAttributedString *s, size_t *n)
{
size_t *out;
size_t nbytes;
nbytes = (s->len + 1) * sizeof (size_t);
*n = s->len;
out = (size_t *) uiAlloc(nbytes, "size_t[] (uiAttributedString)");
memmove(out, s->u8tou16, nbytes);
return out;
}
size_t *attrstrCopyUTF16ToUTF8(uiAttributedString *s, size_t *n)
{
size_t *out;

1
common/uipriv.h
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@ -73,6 +73,7 @@ extern struct graphemes *graphemes(void *s, size_t len);
extern const uint16_t *attrstrUTF16(uiAttributedString *s);
extern size_t attrstrUTF16Len(uiAttributedString *s);
extern size_t attrstrUTF8ToUTF16(uiAttributedString *s, size_t n);
extern size_t *attrstrCopyUTF8ToUTF16(uiAttributedString *s, size_t *n);
extern size_t *attrstrCopyUTF16ToUTF8(uiAttributedString *s, size_t *n);
// attrlist.c

12
darwin/drawtext.m
View File

@ -28,9 +28,11 @@ struct uiDrawTextLayout {
// we compute this once when first creating the layout
uiDrawTextLayoutLineMetrics *lineMetrics;
// for converting CFAttributedString indices to byte offsets
// for converting CFAttributedString indices from/to byte offsets
size_t *u8tou16;
size_t nUTF8;
size_t *u16tou8;
size_t nu16tou8; // TODO I don't like the casing of this name
size_t nUTF16;
};
static CTFontRef fontdescToCTFont(uiDrawFontDescriptor *fd)
@ -201,8 +203,9 @@ uiDrawTextLayout *uiDrawNewTextLayout(uiAttributedString *s, uiDrawFontDescripto
tl->nLines = CFArrayGetCount(tl->lines);
tl->lineMetrics = computeLineMetrics(tl->frame, tl->size);
// and finally copy the UTF-16 to UTF-8 index conversion table
tl->u16tou8 = attrstrCopyUTF16ToUTF8(s, &(tl->nu16tou8));
// and finally copy the UTF-8/UTF-16 conversion tables
tl->u8tou16 = attrstrCopyUTF8ToUTF16(s, &(tl->nUTF8));
tl->u16tou8 = attrstrCopyUTF16ToUTF8(s, &(tl->nUTF16));
return tl;
}
@ -210,6 +213,7 @@ uiDrawTextLayout *uiDrawNewTextLayout(uiAttributedString *s, uiDrawFontDescripto
void uiDrawFreeTextLayout(uiDrawTextLayout *tl)
{
uiFree(tl->u16tou8);
uiFree(tl->u8tou16);
uiFree(tl->lineMetrics);
// TODO release tl->lines?
CFRelease(tl->frame);