Allow LyX format to be shown in View>Source.

Cherry-picked from b7ac2d69e7.

src/Buffer.cpp

@@ -3215,14 +3215,14 @@ void Buffer::getSourceCode(odocstream & os, string const format,
 					convert<docstring>(par_end - 1))
 			   << "\n\n";
 		}
-		TexRow texrow;
-		texrow.reset();
-		texrow.newline();
-		texrow.newline();
 		// output paragraphs
-		if (params().isDocBook())
-			docbookParagraphs(text(), *this, os, runparams);
-		else if (runparams.flavor == OutputParams::HTML) {
+		if (runparams.flavor == OutputParams::LYX) {
+			Paragraph const & par = text().paragraphs()[par_begin];
+			ostringstream ods;
+			depth_type dt = par.getDepth();
+			par.write(ods, params(), dt);
+			os << from_utf8(ods.str());
+		} else if (runparams.flavor == OutputParams::HTML) {
 			XHTMLStream xs(os);
 			setMathFlavor(runparams);
 			xhtmlParagraphs(text(), *this, xs, runparams);
@@ -3232,6 +3232,8 @@ void Buffer::getSourceCode(odocstream & os, string const format,
 			// Probably should have some routine with a signature like them.
 			writePlaintextParagraph(*this,
 				text().paragraphs()[par_begin], os, runparams, dummy);
+		} else if (params().isDocBook()) {
+			docbookParagraphs(text(), *this, os, runparams);
 		} else {
 			// We need to validate the Buffer params' features here
 			// in order to know if we should output polyglossia
@@ -3239,28 +3241,46 @@ void Buffer::getSourceCode(odocstream & os, string const format,
 			LaTeXFeatures features(*this, params(), runparams);
 			params().validate(features);
 			runparams.use_polyglossia = features.usePolyglossia();
+			TexRow texrow;
+			texrow.reset();
+			texrow.newline();
+			texrow.newline();
 			// latex or literate
 			otexstream ots(os, texrow);
 			latexParagraphs(*this, text(), ots, runparams);
 		}
 	} else {
 		os << "% ";
-		if (output == FullSource) 
+		if (output == FullSource)
 			os << _("Preview source code");
 		else if (output == OnlyPreamble)
 			os << _("Preview preamble");
 		else if (output == OnlyBody)
 			os << _("Preview body");
 		os << "\n\n";
-		d->texrow.reset();
-		d->texrow.newline();
-		d->texrow.newline();
-		if (params().isDocBook())
-			writeDocBookSource(os, absFileName(), runparams, output);
-		else if (runparams.flavor == OutputParams::HTML)
+		if (runparams.flavor == OutputParams::LYX) {
+			ostringstream ods;
+			if (output == FullSource)
+				write(ods);
+			else if (output == OnlyPreamble)
+				params().writeFile(ods);
+			else if (output == OnlyBody)
+				text().write(ods);
+			os << from_utf8(ods.str());
+		} else if (runparams.flavor == OutputParams::HTML) {
 			writeLyXHTMLSource(os, runparams, output);
-		else {
+		} else if (runparams.flavor == OutputParams::TEXT) {
+			if (output == OnlyPreamble) {
+				os << _("% Plaintext does not have a preamble.");
+			} else
+				writePlaintextFile(*this, os, runparams);
+		} else if (params().isDocBook()) {
+				writeDocBookSource(os, absFileName(), runparams, output);
+		} else {
 			// latex or literate
+			d->texrow.reset();
+			d->texrow.newline();
+			d->texrow.newline();
 			otexstream ots(os, d->texrow);
 			writeLaTeXSource(ots, string(), runparams, output);
 		}

src/BufferParams.cpp

@@ -2181,6 +2181,8 @@ OutputParams::FLAVOR BufferParams::getOutputFlavor(string const format) const
 		result = OutputParams::LUATEX;
 	else if (dformat == "dviluatex")
 		result = OutputParams::DVILUATEX;
+	else if (dformat == "lyx")
+		result = OutputParams::LYX;
 	else {
 		// Try to determine flavor of default output format
 		vector<string> backs = backends();

src/OutputParams.h

@@ -35,7 +35,8 @@ public:
 		XETEX,
 		XML,
 		HTML,
-		TEXT
+		TEXT,
+		LYX
 	};
 	
 	enum MathFlavor {

src/frontends/qt4/GuiViewSource.cpp

@@ -203,11 +203,10 @@ void ViewSourceWidget::updateDefaultFormat()
 	for (; it != en; ++it) {
 		string const format = *it;
 		Format const * fmt = formats.getFormat(format);
-		if (!fmt)
+		if (!fmt) {
 			LYXERR0("Can't find format for backend " << format << "!");
-		else if (fmt->name() == "lyx")
-			// we can't presently display the LyX format itself
 			continue;
+		}
 
 		QString const pretty =
 			fmt ? qt_(fmt->prettyname()) : toqstr(format);

src/insets/InsetExternal.cpp

@@ -746,6 +746,9 @@ void InsetExternal::validate(LaTeXFeatures & features) const
 	case OutputParams::TEXT:
 		format = "text";
 		break;
+	case OutputParams::LYX:
+		format = "lyx";
+		break;
 	}
 	external::Template::Formats::const_iterator cit =
 		et.formats.find(format);

status.20x

@@ -43,6 +43,8 @@ What's new
 
 - Show backends, not formats, in View>Source (bug #7652).
 
+- Allow native LyX format to be shown in View>Source.
+
 
 * DOCUMENTATION AND LOCALIZATION
 
@@ -90,6 +92,8 @@ What's new
 
 - Fix enumitem module translation (bug #8201).
 
+- Set math display format when showing XHTML in View>Source.
+
 
 * DOCUMENTATION AND LOCALIZATION