[LyX/master] "Script chars" also need to be output as macro with full utf8 engines and TeX fonts

[Juergen Spitzmueller]

commit f6a77d5d8244bf9d813f475c72223b30f36a2a2f
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Fri Jan 11 10:08:49 2019 +0100

    "Script chars" also need to be output as macro with full utf8 engines and 
TeX fonts
    
    Fixes rest of #9681
---
 src/Paragraph.cpp |   28 ++++++++++++++++------------
 1 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/src/Paragraph.cpp b/src/Paragraph.cpp
index a51c252..82038e3 100644
--- a/src/Paragraph.cpp
+++ b/src/Paragraph.cpp
@@ -891,22 +891,25 @@ int Paragraph::Private::latexSurrogatePair(BufferParams 
const & bparams,
        }
        docstring latex2 = encoding.latexChar(c).first;
 
-       if (docstring(1, next) == latex1) {
-               // The encoding supports the combination:
-               // output as is (combining char after base char).
-               os << latex2 << latex1;
-               return latex1.length() + latex2.length();
-       }
-
        // Handle combining characters in "script" context (i.e., \textgreek 
and \textcyrillic)
        docstring::size_type const brace1 = 
latex2.find_first_of(from_ascii("{"));
        docstring::size_type const brace2 = 
latex2.find_last_of(from_ascii("}"));
        string script = to_ascii(latex2.substr(1, brace1 - 1));
        // "Script chars" need to embraced in \textcyrillic and \textgreek 
notwithstanding
-       // whether they are encodable or not (it only depends on the font 
encoding)
-       if (!runparams.isFullUnicode())
+       // whether they are encodable or not (it only depends on the font 
encoding),
+       // except if we are using fontspec.
+       bool scriptchar = false;
+       if (!bparams.useNonTeXFonts)
                // This will get us a script value to deal with below
-               Encodings::isKnownScriptChar(c, script);
+               scriptchar = Encodings::isKnownScriptChar(c, script);
+
+       if (!scriptchar && docstring(1, next) == latex1) {
+               // The encoding supports the combination:
+               // output as is (combining char after base char).
+               os << latex2 << latex1;
+               return latex1.length() + latex2.length();
+       }
+
        int pos = 0;
        int length = brace2;
        string fontenc;
@@ -1392,8 +1395,9 @@ void Paragraph::Private::latexSpecialChar(otexstream & os,
                string fontenc;
                fontenc = running_font.language()->fontenc(bparams);
                // "Script chars" need to embraced in \textcyrillic and 
\textgreek notwithstanding
-               // whether they are encodable or not (it only depends on the 
font encoding)
-               if (!runparams.isFullUnicode() && 
Encodings::isKnownScriptChar(c, script)) {
+               // whether they are encodable or not (it only depends on the 
font encoding),
+               // except if we are using fontspec.
+               if (!bparams.useNonTeXFonts && Encodings::isKnownScriptChar(c, 
script)) {
                        docstring const wrapper = from_ascii("\\" + script + 
"{");
                        docstring ltx = latex.first;
                        if (!prefixIs(ltx, wrapper))