[LyX/master] Activate export of external material for XHTML.

[Richard Heck]

commit daf7cd4c05f55c7eb957df7076ec91dcd2eca543
Author: Richard Heck <rgh...@lyx.org>
Date:   Sat Jul 30 22:42:01 2016 -0400

    Activate export of external material for XHTML.
    
    As of this commit, this is ineffective, since no changes have been
    made to external_templates.
---
 src/insets/InsetExternal.cpp |   15 ++++++++++-----
 1 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/insets/InsetExternal.cpp b/src/insets/InsetExternal.cpp
index 5f2a1b3..e2ac61c 100644
--- a/src/insets/InsetExternal.cpp
+++ b/src/insets/InsetExternal.cpp
@@ -30,6 +30,7 @@
 #include "MetricsInfo.h"
 #include "OutputParams.h"
 #include "output_latex.h"
+#include "output_xhtml.h"
 #include "texstream.h"
 #include "TocBackend.h"
 
@@ -754,12 +755,16 @@ int InsetExternal::docbook(odocstream & os,
 }
 
 
-docstring InsetExternal::xhtml(XHTMLStream  & /*xs*/,
-                       OutputParams const & /*rp*/) const
+docstring InsetExternal::xhtml(XHTMLStream & xs,
+                       OutputParams const & runparams) const
 {
-//     external::writeExternal(params_, "XHTML", buffer(), os,
-//                                    *(runparams.exportdata), false,
-//                                    runparams.dryrun || runparams.inComment);
+       bool const external_in_tmpdir = !runparams.nice;
+       bool const dryrun = runparams.dryrun || runparams.inComment;
+       odocstringstream ods;
+       otexstream ots(ods, false);
+       external::writeExternal(params_, "XHTML", buffer(), ots,
+                                      *(runparams.exportdata), 
external_in_tmpdir, dryrun);
+       xs << XHTMLStream::ESCAPE_NONE << ods.str();
        return docstring();
 }