Force LTR for numeric citations

Fixes: #3005
(cherry picked from commit cce9adc185)

src/insets/InsetCitation.cpp

@@ -19,6 +19,7 @@
 #include "BufferParams.h"
 #include "BufferView.h"
 #include "DispatchResult.h"
+#include "Font.h"
 #include "FuncCode.h"
 #include "FuncRequest.h"
 #include "FuncStatus.h"
@@ -443,6 +444,20 @@ docstring InsetCitation::basicLabel(bool for_xhtml) const
 	return '[' + label + ']';
 }
 
+
+bool InsetCitation::forceLTR(OutputParams const & rp) const
+{
+	// We have to force LTR for numeric references
+	// [= plain BibTeX, numeric natbib and biblatex].
+	// Except for XeTeX/bidi . See #3005.
+	if (rp.local_font->isRightToLeft()
+	    && rp.use_polyglossia
+	    && rp.flavor == OutputParams::XETEX)
+		return false;
+	return (buffer().masterParams().citeEngine().list().front() == "basic"
+		|| buffer().masterParams().citeEngineType() == ENGINE_TYPE_NUMERICAL);
+}
+
 docstring InsetCitation::screenLabel() const
 {
 	return cache.screen_label;

src/insets/InsetCitation.h

@@ -70,6 +70,8 @@ public:
 				  UpdateType utype, TocBackend & backend) const;
 	///
 	std::string contextMenuName() const;
+	///
+	bool forceLTR(OutputParams const &) const;
 	//@}
 
 	/// \name Static public methods obligated for InsetCommand derived classes

status.23x

@@ -90,6 +90,8 @@ What's new
 
 - Fix direction of roman numbers with RTL documents and LuaTeX.
 
+- Fix direction of numbered citations outside XeTeX/bidi (bug 3005).
+
 - Fix direction of references with XeTeX/bidi (bug 11626).
 
 - Fix interplay of the memoir class and custom page size/geometry (bug 10970).