Fix bug #5716.

Since separators are not allowed by the current .lyx version written by
tex2lyx, an empty note is used instead.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@36838 a592a061-630c-0410-9148-cb99ea01b6c8

src/tex2lyx/preamble.cpp

@@ -489,7 +489,7 @@ void end_preamble(ostream & os, TextClass const & /*textclass*/)
 
 	// output the LyX file settings
 	os << "#LyX file created by tex2lyx " << PACKAGE_VERSION << "\n"
-	   << "\\lyxformat 264\n"
+	   << "\\lyxformat " << LYX_FORMAT << '\n'
 	   << "\\begin_document\n"
 	   << "\\begin_header\n"
 	   << "\\textclass " << h_textclass << "\n";

src/tex2lyx/test/test-structure.tex

@@ -91,6 +91,15 @@ We can also nest enumerations
 \end{enumerate}
 \item Item2
 \end{enumerate}
+\begin{enumerate}
+\item Item1 (appears as Item3 with bug 5716)
+
+Normal paragraph in Item1
+
+\begin{enumerate}
+\item Item1.a
+\end{enumerate}
+\end{enumerate}
 
 Let's see what happens when normal paragraphs are inserted in lists:
 

src/tex2lyx/tex2lyx.h

@@ -113,6 +113,8 @@ extern CommandMap known_environments;
 extern CommandMap known_math_environments;
 ///
 extern bool noweb_mode;
+/// LyX format that is created by tex2lyx
+int const LYX_FORMAT = 264;
 
 /// path of the master .tex file
 extern std::string getMasterFilePath();

src/tex2lyx/text.cpp

@@ -715,7 +715,7 @@ void parse_unknown_environment(Parser & p, string const & name, ostream & os,
 
 
 void parse_environment(Parser & p, ostream & os, bool outer,
-		       Context & parent_context)
+                       string & last_env, Context & parent_context)
 {
 	Layout const * newlayout;
 	string const name = p.getArg('{', '}');
@@ -862,6 +862,28 @@ void parse_environment(Parser & p, ostream & os, bool outer,
 			context.need_end_deeper = true;
 		}
 		parent_context.check_end_layout(os);
+		if (last_env == name) {
+			// we need to output a separator since LyX would export
+			// the two environments as one otherwise (bug 5716)
+			docstring const sep = from_ascii("--Separator--");
+			TeX2LyXDocClass const & textclass(parent_context.textclass);
+			if (LYX_FORMAT >= 273 && textclass.hasLayout(sep)) {
+				Context newcontext(parent_context);
+				newcontext.layout = &(textclass[sep]);
+				newcontext.check_layout(os);
+				newcontext.check_end_layout(os);
+			} else {
+				parent_context.check_layout(os);
+				begin_inset(os, "Note Note\n");
+				os << "status closed\n";
+				Context newcontext(true, textclass,
+						&(textclass.defaultLayout()));
+				newcontext.check_layout(os);
+				newcontext.check_end_layout(os);
+				end_inset(os);
+				parent_context.check_end_layout(os);
+			}
+		}
 		switch (context.layout->latextype) {
 		case  LATEX_LIST_ENVIRONMENT:
 			context.add_par_extra_stuff("\\labelwidthstring "
@@ -936,6 +958,7 @@ void parse_environment(Parser & p, ostream & os, bool outer,
 		parse_unknown_environment(p, name, os, FLAG_END, outer,
 					  parent_context);
 
+	last_env = name;
 	active_environments.pop_back();
 }
 
@@ -1145,6 +1168,7 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 	string bibliographystyle;
 	bool const use_natbib = used_packages.find("natbib") != used_packages.end();
 	bool const use_jurabib = used_packages.find("jurabib") != used_packages.end();
+	string last_env;
 	while (p.good()) {
 		Token const & t = p.get_token();
 
@@ -1173,6 +1197,12 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 		if (t.character() == '}' && (flags & FLAG_BRACE_LAST))
 			return;
 
+		// If there is anything between \end{env} and \begin{env} we
+		// don't need to output a separator.
+		if (t.cat() != catSpace && t.cat() != catNewline &&
+		    t.asInput() != "\\begin")
+			last_env = "";
+
 		//
 		// cat codes
 		//
@@ -1417,7 +1447,7 @@ void parse_text(Parser & p, ostream & os, unsigned flags, bool outer,
 		}
 
 		else if (t.cs() == "begin")
-			parse_environment(p, os, outer, context);
+			parse_environment(p, os, outer, last_env, context);
 
 		else if (t.cs() == "end") {
 			if (flags & FLAG_END) {