From ceb180cebd64903f2376378fc2d425eb9e001bc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20St=C3=B6hr?= <uwestoehr@lyx.org>
Date: Fri, 8 Jun 2012 05:39:00 +0200
Subject: [PATCH] GuiDocument.cpp: some languages only work with polyglossia,
 therefore enable non-TeX fonts when one of them is used as document language

---
 src/frontends/qt4/GuiDocument.cpp | 22 +++++++++++++++++++++-
 src/frontends/qt4/GuiDocument.h   |  1 +
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index 164fe9341e..4b269ca1b5 100644
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -1060,7 +1060,7 @@ GuiDocument::GuiDocument(GuiView & lv)
 	// language & quote
 	langModule = new UiWidget<Ui::LanguageUi>;
 	connect(langModule->languageCO, SIGNAL(activated(int)),
-		this, SLOT(change_adaptor()));
+		this, SLOT(languageChanged(int)));
 	connect(langModule->defaultencodingRB, SIGNAL(clicked()),
 		this, SLOT(change_adaptor()));
 	connect(langModule->otherencodingRB, SIGNAL(clicked()),
@@ -1757,6 +1757,26 @@ void GuiDocument::deleteBoxBackgroundColor()
 }
 
 
+void GuiDocument::languageChanged(int i)
+{
+	// some languages only work with polyglossia/XeTeX
+	string current_language = lyx::languages.getLanguage(
+		fromqstr(langModule->languageCO->itemData(i).toString()))->lang();
+	if (current_language == "ancientgreek"
+		|| current_language == "coptic"	|| current_language == "divehi"
+		|| current_language == "hindi" || current_language == "kurmanji"
+		|| current_language == "lao" || current_language == "marathi"
+		|| current_language == "occitan" || current_language == "sanskrit"
+		|| current_language == "syriac"	|| current_language == "tamil"
+		|| current_language == "telugu"	|| current_language == "urdu") {
+			fontModule->osFontsCB->setChecked(true);
+			fontModule->osFontsCB->setEnabled(false);
+	}
+	else
+		fontModule->osFontsCB->setEnabled(true);
+}
+
+
 void GuiDocument::osFontsChanged(bool nontexfonts)
 {
 	bool const tex_fonts = !nontexfonts;
diff --git a/src/frontends/qt4/GuiDocument.h b/src/frontends/qt4/GuiDocument.h
index 4ab74c6dbf..cb89b20f5d 100644
--- a/src/frontends/qt4/GuiDocument.h
+++ b/src/frontends/qt4/GuiDocument.h
@@ -120,6 +120,7 @@ private Q_SLOTS:
 	void deleteNoteFontColor();
 	void changeBoxBackgroundColor();
 	void deleteBoxBackgroundColor();
+	void languageChanged(int);
 	void osFontsChanged(bool);
 	void branchesRename(docstring const &, docstring const &);
 private: