From 1bf18368cfcbb9d2c371a3f2f53a58cc037d5585 Mon Sep 17 00:00:00 2001
From: Juergen Spitzmueller <spitz@lyx.org>
Date: Sat, 30 May 2020 12:54:20 +0200
Subject: [PATCH] Add support for the xindex index processor

This is a modern alternative for makeindex that is fully unicode-aware
and written in lua.

As opposed to xindy, it is more lightweight and actively maintained.

The program is still in a rather early stage of development, so we do
not propose this as default.

This relies on xindex 0.22 (about to be released) to function properly.
---
 lib/configure.py   |  2 +-
 src/Converter.cpp  |  3 +--
 src/LaTeX.cpp      | 10 ++++++++--
 src/OutputParams.h |  5 +----
 4 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/lib/configure.py b/lib/configure.py
index 445e68d3ac..bd8d435949 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1299,7 +1299,7 @@ def checkOtherEntries():
         rc_entry = [ r'\jbibtex_command "automatic"' ],
         alt_rc_entry = [ r'\jbibtex_alternatives "%%"' ])
     checkProgAlternatives('available index processors',
-        ['texindy $$x -t $$b.ilg', 'makeindex -c -q', 'xindy -M texindy $$x -t $$b.ilg'],
+        ['texindy $$x -t $$b.ilg', 'xindex -l $$lcode', 'makeindex -c -q', 'xindy -M texindy $$x -t $$b.ilg'],
         rc_entry = [ r'\index_command "%%"' ],
         alt_rc_entry = [ r'\index_alternatives "%%"' ])
     checkProg('an index processor appropriate to Japanese',
diff --git a/src/Converter.cpp b/src/Converter.cpp
index 0c541c894b..3487f4b45e 100644
--- a/src/Converter.cpp
+++ b/src/Converter.cpp
@@ -481,8 +481,7 @@ Converters::RetVal Converters::convert(Buffer const * buffer,
 		runparams.bibtex_command = bp.bibtexCommand();
 		runparams.index_command = (bp.index_command == "default") ?
 			string() : bp.index_command;
-		runparams.document_language = bp.language->babel();
-		runparams.xindy_language = bp.language->xindy();
+		runparams.document_language = bp.language->lang();
 		// Some macros rely on font encoding
 		runparams.main_fontenc = bp.main_font_encoding();
 		runparams.only_childbibs = !bp.useBiblatex()
diff --git a/src/LaTeX.cpp b/src/LaTeX.cpp
index 81f8a39b3a..f5b6d20d30 100644
--- a/src/LaTeX.cpp
+++ b/src/LaTeX.cpp
@@ -23,6 +23,7 @@
 #include "LyX.h"
 #include "DepTable.h"
 #include "Encoding.h"
+#include "Language.h"
 
 #include "support/debug.h"
 #include "support/convert.h"
@@ -541,13 +542,15 @@ int LaTeX::runMakeIndex(string const & f, OutputParams const & rp,
 
 	if (!rp.index_command.empty())
 		tmp = rp.index_command;
+
+	Language const * doc_lang = languages.getLanguage(rp.document_language);
 	
 	if (contains(tmp, "$$x")) {
 		// This adds appropriate [te]xindy options
 		// such as language and codepage (for the
 		// main document language/encoding) as well
 		// as input markup (latex or xelatex)
-		string xdyopts = rp.xindy_language;
+		string xdyopts = doc_lang ? doc_lang->xindy() : string();
 		if (!xdyopts.empty())
 			xdyopts = "-L " + xdyopts;
 		if (rp.isFullUnicode() && rp.encoding->package() == Encoding::none) {
@@ -580,7 +583,10 @@ int LaTeX::runMakeIndex(string const & f, OutputParams const & rp,
 		"idx file has been made, running index processor ("
 		<< tmp << ") on file " << f);
 
-	tmp = subst(tmp, "$$lang", rp.document_language);
+	if (doc_lang) {
+		tmp = subst(tmp, "$$lang", doc_lang->babel());
+		tmp = subst(tmp, "$$lcode", doc_lang->code());
+	}
 	if (rp.use_indices) {
 		tmp = lyxrc.splitindex_command + " -m " + quoteName(tmp);
 		LYXERR(Debug::LATEX,
diff --git a/src/OutputParams.h b/src/OutputParams.h
index 5aa6080de7..59d7221ff9 100644
--- a/src/OutputParams.h
+++ b/src/OutputParams.h
@@ -129,7 +129,7 @@ public:
 	 */
 	Font const * local_font;
 
-	/** Document language babel name
+	/** Document language lyx name
 	 */
 	std::string document_language;
 
@@ -200,9 +200,6 @@ public:
 	*/
 	std::string index_command;
 
-	/// The Xindy language module
-	std::string xindy_language;
-
 	/** Hyperref driver
 	*/
 	std::string hyperref_driver;