[LyX/master] Fix bug #8814: Ask for place to export a file if it has not yet been saved.

[Richard Heck]

commit b6d182b81a882aadec6f27e17a60ebf7a3305b4a
Author: Richard Heck <rgh...@lyx.org>
Date:   Sat Jun 25 03:04:59 2016 +0100

    Fix bug #8814: Ask for place to export a file if it has not
    yet been saved.
---
 src/frontends/qt4/GuiView.cpp |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/frontends/qt4/GuiView.cpp b/src/frontends/qt4/GuiView.cpp
index 87ee553..445678f 100644
--- a/src/frontends/qt4/GuiView.cpp
+++ b/src/frontends/qt4/GuiView.cpp
@@ -3528,16 +3528,20 @@ void GuiView::dispatch(FuncRequest const & cmd, 
DispatchResult & dr)
                case LFUN_BUFFER_EXPORT: {
                        if (!doc_buffer)
                                break;
-                       FileName target_dir = doc_buffer->fileName().onlyPath();
-                       string const dest = cmd.getArg(1);
-                       if (!dest.empty() && FileName::isAbsolute(dest))
-                               target_dir = FileName(support::onlyPath(dest));
                        // GCC only sees strfwd.h when building merged
                        if (::lyx::operator==(cmd.argument(), "custom")) {
                                dispatch(FuncRequest(LFUN_DIALOG_SHOW, 
"sendto"), dr);
                                break;
                        }
-                       if (!target_dir.isDirWritable()) {
+
+                       string const dest = cmd.getArg(1);
+                       FileName target_dir;
+                       if (!dest.empty() && FileName::isAbsolute(dest))
+                               target_dir = FileName(support::onlyPath(dest));
+                       else
+                target_dir = doc_buffer->fileName().onlyPath();
+
+                       if (doc_buffer->isUnnamed() || 
!target_dir.isDirWritable()) {
                                exportBufferAs(*doc_buffer, cmd.argument());
                                break;
                        }