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Better comment from Dov Feldstern (and remove now obsolete comment about
the isComposeChar functions) git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@17544 a592a061-630c-0410-9148-cb99ea01b6c8
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@ -335,23 +335,24 @@ void RowPainter::paintChars(pos_type & vpos, LyXFont const & font,
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if (!isPrintableNonspace(c))
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break;
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// We have to draw hebrew characters one by one, since we
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// apply our own bidi algorithm, and qt would reverse the
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// order of characters in words again (bug 3040).
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// The same applys for arabic (see below).
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/* Because we do our own bidi, at this point the strings are
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* already in visual order. However, Qt also applies its own
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* bidi algorithm to strings that it paints to the screen.
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* Therefore, if we were to paint Hebrew/Arabic words as a
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* single string, the letters in the words would get reversed
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* again. In order to avoid that, we don't collect Hebrew/
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* Arabic characters, but rather paint them one at a time.
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* See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
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*/
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if (hebrew)
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break;
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/* FIXME: these checks are irrelevant, since 'arabic' and
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* 'hebrew' alone are already going to trigger a break.
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* The encodings used by isComposeChar_arabic and
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* isComposeChar_hebrew are incorrect (probably iso8859-8 and
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* iso8859-6), they also have to be adapted to Unicode.
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* However, this should not be removed completely, because
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* if an alternative solution is found which allows grouping
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* of arabic and hebrew characters, then these breaks may have
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* to be re-applied.
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* See also http://thread.gmane.org/gmane.editors.lyx.devel/79740
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if (arabic && Encodings::isComposeChar_arabic(c))
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break;
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@ -362,6 +363,7 @@ void RowPainter::paintChars(pos_type & vpos, LyXFont const & font,
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if (arabic) {
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c = par_.transformChar(c, pos);
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/* see comment in hebrew, explaining why we break */
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break;
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}
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