Add a layout tag ForceOwnlines that assures an inset is started and terminated by a line break in the LaTeX output.

Fixes: #8875.

lib/doc/Customization.lyx

@@ -1,5 +1,5 @@
-#LyX 2.1 created this file. For more info see http://www.lyx.org/
-\lyxformat 476
+#LyX 2.2 created this file. For more info see http://www.lyx.org/
+\lyxformat 479
 \begin_document
 \begin_header
 \textclass scrbook
@@ -17019,6 +17019,59 @@ g.
 
 in TeX code or URL.
  A kludge.
+\change_inserted -712698321 1417441977
+
+\end_layout
+
+\begin_layout Description
+
+\change_inserted -712698321 1417442090
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\change_inserted -712698321 1417441983
+ForceOwnlines
+\end_layout
+
+\end_inset
+
+ [
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\change_inserted -712698321 1417441978
+
+\emph on
+0
+\end_layout
+
+\end_inset
+
+,
+\begin_inset space \thinspace{}
+\end_inset
+
+
+\begin_inset Flex Code
+status collapsed
+
+\begin_layout Plain Layout
+
+\change_inserted -712698321 1417441978
+1
+\end_layout
+
+\end_inset
+
+] Force a a line break in the LaTeX output before the inset starts and after
+ the inset ends.
+ This assures the inset itself is output on its own lines, for parsing purposes.
+\change_unchanged
+
 \end_layout
 
 \begin_layout Description
@@ -23533,7 +23586,7 @@ name "chap:List-of-functions"
 \align center
 \begin_inset Tabular
 <lyxtabular version="3" rows="11" columns="8">
-<features rotate="0" tabularvalignment="middle">
+<features tabularvalignment="middle">
 <column alignment="left" valignment="top">
 <column alignment="left" valignment="top">
 <column alignment="left" valignment="top">

lib/layouts/litinsets.inc

@@ -6,7 +6,7 @@
 # Note that this file is included in sweave.module,
 # knitr.module and noweb.module.
 
-Format 49
+Format 52
 
 Counter chunk
     PrettyFormat "Chunk ##"
@@ -44,4 +44,5 @@ InsetLayout "Flex:Chunk"
             RightDelim    >>=<br/>
     EndArgument
     ResetsFont            false
+    ForceOwnlines         true
 End

lib/scripts/layout2layout.py

@@ -171,6 +171,9 @@ import os, re, string, sys
 # Incremented to format 51, 29 May 2014 by spitz
 # New Style tag "ToggleIndent"
 
+# Incremented to format 52, 1 December 2014 by spitz
+# New InsetLayout tag "ForceOwnlines"
+
 # Do not forget to document format change in Customization
 # Manual (section "Declaring a new text class").
 
@@ -178,7 +181,7 @@ import os, re, string, sys
 # development/tools/updatelayouts.py script to update all
 # layout files to the new format.
 
-currentFormat = 51
+currentFormat = 52
 
 
 def usage(prog_name):
@@ -402,7 +405,7 @@ def convert(lines):
                 i += 1
             continue
 
-        if format == 50:
+        if format == 50 or format == 51:
             # nothing to do.
             i += 1
             continue

src/TextClass.cpp

@@ -61,7 +61,7 @@ namespace lyx {
 // You should also run the development/tools/updatelayouts.py script,
 // to update the format of all of our layout files.
 //
-int const LAYOUT_FORMAT = 51; //spitz: add ToggleIndent tag
+int const LAYOUT_FORMAT = 52; //spitz: add ForceOwnlines tag
 
 namespace {
 

src/insets/InsetLayout.cpp

@@ -89,6 +89,7 @@ bool InsetLayout::read(Lexer & lex, TextClass const & tclass)
 		IL_FONT,
 		IL_FORCE_LOCAL_FONT_SWITCH,
 		IL_FORCELTR,
+		IL_FORCEOWNLINES,
 		IL_FORCEPLAIN,
 		IL_FREESPACING,
 		IL_HTMLTAG,
@@ -139,6 +140,7 @@ bool InsetLayout::read(Lexer & lex, TextClass const & tclass)
 		{ "font", IL_FONT },
 		{ "forcelocalfontswitch", IL_FORCE_LOCAL_FONT_SWITCH },
 		{ "forceltr", IL_FORCELTR },
+		{ "forceownlines", IL_FORCEOWNLINES },
 		{ "forceplain", IL_FORCEPLAIN },
 		{ "freespacing", IL_FREESPACING },
 		{ "htmlattr", IL_HTMLATTR },
@@ -256,6 +258,9 @@ bool InsetLayout::read(Lexer & lex, TextClass const & tclass)
 		case IL_FORCELTR:
 			lex >> forceltr_;
 			break;
+		case IL_FORCEOWNLINES:
+			lex >> forceownlines_;
+			break;
 		case IL_INTOC:
 			lex >> intoc_;
 			break;

src/insets/InsetLayout.h

@@ -164,6 +164,8 @@ public:
 	///
 	bool forceLTR() const { return forceltr_; }
 	///
+	bool forceOwnlines() const { return forceownlines_; }
+	///
 	bool isInToc() const { return intoc_; }
 	///
 	bool spellcheck() const { return spellcheck_; }
@@ -262,6 +264,8 @@ private:
 	///
 	bool forceltr_;
 	///
+	bool forceownlines_;
+	///
 	bool needprotect_;
 	/// should the contents be written to TOC strings?
 	bool intoc_;

src/insets/InsetText.cpp

@@ -433,6 +433,8 @@ void InsetText::latex(otexstream & os, OutputParams const & runparams) const
 	// environment. Standard collapsable insets should not
 	// redefine this, non-standard ones may call this.
 	InsetLayout const & il = getLayout();
+	if (il.forceOwnlines())
+		os << breakln;
 	if (!il.latexname().empty()) {
 		if (il.latextype() == InsetLayout::COMMAND) {
 			// FIXME UNICODE
@@ -495,11 +497,13 @@ void InsetText::latex(otexstream & os, OutputParams const & runparams) const
 				os << breakln;
 			else
 				os << safebreakln;
-			os << "\\end{" << from_utf8(il.latexname()) << "}\n";
+			os << "\\end{" << from_utf8(il.latexname()) << "}" << breakln;
 			if (!il.isDisplay())
 				os.protectSpace(true);
 		}
 	}
+	if (il.forceOwnlines())
+		os << breakln;
 }