support for \begin{cases}...\end{cases} (for interactive creation type M-x

[features.git] / src / mathed / formula.C

diff --git a/src/mathed/formula.C b/src/mathed/formula.C
index af74148b79c1562b48cf3940e99d5c83bba83d7d..39b119586b4c0e81b0b677c3c4571465be0dbda2 100644 (file)
--- a/src/mathed/formula.C
+++ b/src/mathed/formula.C
@@ -207,15 +207,9 @@ namespace {
        }
 
 
-       MathArray pipeThroughExtern(string const & arg, MathArray const & ar)
+       MathArray pipeThroughExtern(string const & lang, string const & extra,
+               MathArray const & ar)
        {
-               string lang;
-               string extra;
-               istringstream iss(arg.c_str());
-               iss >> lang >> extra;
-               if (extra.empty())
-                       extra = "noextra";      
-
                if (lang == "octave")
                        return pipeThroughOctave(extra, ar);
 
@@ -507,27 +501,44 @@ InsetFormula::localDispatch(BufferView * bv, kb_action action,
 }
 
 
+bool needEqnArray(string const & extra)
+{
+       return extra == "dsolve";
+}
+
+
 void InsetFormula::handleExtern(const string & arg)
 {
        // where are we?
        if (!mathcursor)
                return; 
 
+       string lang;
+       string extra;
+       istringstream iss(arg.c_str());
+       iss >> lang >> extra;
+       if (extra.empty())
+               extra = "noextra";      
+
        bool selected = mathcursor->selection();
 
        MathArray ar;
-       if (selected) {
+       if (needEqnArray(extra)) {
+               mathcursor->last();
+               mathcursor->readLine(ar);
+               mathcursor->breakLine();
+       } else if (selected) {
                mathcursor->selGet(ar);
                //lyxerr << "use selection: " << ar << "\n";
        } else {
-               mathcursor->end();
+               mathcursor->last();
                mathcursor->stripFromLastEqualSign();
                ar = mathcursor->cursor().cell();
                mathcursor->insert(MathAtom(new MathCharInset('=', LM_TC_VAR)));
                //lyxerr << "use whole cell: " << ar << "\n";
        }
 
-       mathcursor->insert(pipeThroughExtern(arg, ar));
+       mathcursor->insert(pipeThroughExtern(lang, extra, ar));
 }