[LyX/2.2.x] Activate export of external material for XHTML.

[Richard Heck]

commit de3284ba9adb688f5ccbbe1992700fb7e3115628
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.
    
    (cherry picked from commit daf7cd4c05f55c7eb957df7076ec91dcd2eca543)
---
 src/insets/InsetExternal.cpp |   16 +++++++++++-----
 1 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/insets/InsetExternal.cpp b/src/insets/InsetExternal.cpp
index 8e89ead..d524cfc 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 "TocBackend.h"
 
 #include "frontends/alert.h"
@@ -753,12 +754,17 @@ 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;
+    TexRow texrow;
+    odocstringstream ods;
+    otexstream ots(ods, texrow);
+    external::writeExternal(params_, "XHTML", buffer(), ots,
+                                      *(runparams.exportdata), 
external_in_tmpdir, dryrun);
+       xs << XHTMLStream::ESCAPE_NONE << ods.str();
        return docstring();
 }