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QFontMetrics::xHeight() is not always the ascent of 'x'
Use the real ascent of glyph 'x' as LyX 2.3.x did. It can make a difference at least on Windows with many fonts. Fixes bug #13100.
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@ -114,7 +114,7 @@ inline QChar const ucs4_to_qchar(char_type const ucs4)
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GuiFontMetrics::GuiFontMetrics(QFont const & font)
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: font_(font), metrics_(font, 0), xheight_(metrics_.xHeight()),
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: font_(font), metrics_(font, 0), xheight_(-metrics_.boundingRect('x').top()),
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strwidth_cache_(strwidth_cache_max_cost),
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breakstr_cache_(breakstr_cache_max_cost),
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qtextlayout_cache_(qtextlayout_cache_max_size)
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@ -163,7 +163,8 @@ int GuiFontMetrics::em() const
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int GuiFontMetrics::xHeight() const
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{
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// LATTEST(metrics_.xHeight() == ascent('x'));
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// This is not alays true on Windows (see #13100).
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// LATTEST(metrics_.xHeight() == ascent('x'));
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return xheight_;
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}
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