[coretext] Fix positioning with trailing whitespace
Fixes https://code.google.com/p/chromium/issues/detail?id=476913
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@ -788,6 +788,17 @@ retry:
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buffer->len = 0;
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uint32_t status_and = ~0, status_or = 0;
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double advances_so_far = 0;
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/* For right-to-left runs, CoreText returns the glyphs positioned such that
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* any trailing whitespace is to the left of (0,0). Adjust coordinate system
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* to fix for that. Test with any RTL string with trailing spaces.
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* https://code.google.com/p/chromium/issues/detail?id=476913
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*/
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if (HB_DIRECTION_IS_BACKWARD (buffer->props.direction))
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{
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advances_so_far -= CTLineGetTrailingWhitespaceWidth (line);
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if (HB_DIRECTION_IS_VERTICAL (buffer->props.direction))
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advances_so_far = -advances_so_far;
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}
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const CFRange range_all = CFRangeMake (0, 0);
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