Upstreaming compilation patch needed for Gentoo.

[lyx.git] / src / frontends / qt4 / GuiDocument.cpp

diff --git a/src/frontends/qt4/GuiDocument.cpp b/src/frontends/qt4/GuiDocument.cpp
index b67f7979f69fdf843683a0f3e31b24061ed3a57b..74c480787892eb3320343615766172daedbfb1fa 100644 (file)
--- a/src/frontends/qt4/GuiDocument.cpp
+++ b/src/frontends/qt4/GuiDocument.cpp
@@ -68,11 +68,12 @@
 #include "frontends/alert.h"
 
 #include <QAbstractItemModel>
-#include <QHeaderView>
+#include <QButtonGroup>
 #include <QColor>
 #include <QColorDialog>
 #include <QCloseEvent>
 #include <QFontDatabase>
+#include <QHeaderView>
 #include <QScrollBar>
 #include <QTextBoundaryFinder>
 #include <QTextCursor>
@@ -2445,6 +2446,28 @@ void GuiDocument::biblioChanged()
 }
 
 
+void GuiDocument::checkPossibleCiteEngines()
+{
+       // Check if the class provides a specific engine,
+       // and if so, enforce this.
+       string force_engine;
+       if (documentClass().provides("natbib")
+           || documentClass().provides("natbib-internal"))
+               force_engine = "natbib";
+       else if (documentClass().provides("jurabib"))
+               force_engine = "jurabib";
+       else if (documentClass().provides("biblatex"))
+               force_engine = "biblatex";
+       else if (documentClass().provides("biblatex-natbib"))
+               force_engine = "biblatex-natbib";
+
+       if (!force_engine.empty())
+               biblioModule->citeEngineCO->setCurrentIndex(
+                       biblioModule->citeEngineCO->findData(toqstr(force_engine)));
+       biblioModule->citeEngineCO->setEnabled(force_engine.empty());
+}
+
+
 void GuiDocument::rescanBibFiles()
 {
        if (isBiblatex())
@@ -3326,6 +3349,8 @@ void GuiDocument::paramsToDialog()
        updateEngineType(documentClass().opt_enginetype(),
                bp_.citeEngineType());
 
+       checkPossibleCiteEngines();
+
        biblioModule->citeStyleCO->setCurrentIndex(
                biblioModule->citeStyleCO->findData(bp_.citeEngineType()));
 
@@ -3983,6 +4008,12 @@ bool GuiDocument::isBiblatex() const
                biblioModule->citeEngineCO->itemData(
                                biblioModule->citeEngineCO->currentIndex()).toString();
 
+       // this can happen if the cite engine is unknown, which can happen
+       // if one is using a file that came from someone else, etc. in that
+       // case, we crash if we proceed.
+       if (engine.isEmpty())
+           return false;
+
        return theCiteEnginesList[fromqstr(engine)]->getCiteFramework() == "biblatex";
 }