libui/_wip/attrstr_metrics/numlinesbyterange

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darwin
int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
{
return CFArrayGetCount([tl->forLines lines]);
}
void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
{
CTLineRef lr;
CFRange range;
lr = (CTLineRef) CFArrayGetValueAtIndex([tl->forLines lines], line);
range = CTLineGetStringRange(lr);
*start = tl->u16tou8[range.location];
if (tl->empty)
*end = *start;
else
*end = tl->u16tou8[range.location + range.length];
}
unix
int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
{
return pango_layout_get_line_count(tl->layout);
}
void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
{
PangoLayoutLine *pll;
pll = pango_layout_get_line_readonly(tl->layout, line);
*start = pll->start_index;
*end = pll->start_index + pll->length;
// TODO unref pll?
}
windows
int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl)
{
return 0;
#if 0
TODO
return tl->nLines;
#endif
}
// DirectWrite doesn't provide a direct way to do this, so we have to do this manually
// TODO does that comment still apply here or to the code at the top of this file?
void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end)
{
#if 0
TODO
*start = tl->lineInfo[line].startPos;
*start = tl->u16tou8[*start];
*end = tl->lineInfo[line].endPos - tl->lineInfo[line].newlineCount;
*end = tl->u16tou8[*end];
#endif
}