Added Export As... dialog, exploiting the new destination path that can

be specified when exporting.
This fixes #3402.


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@39805 a592a061-630c-0410-9148-cb99ea01b6c8

lib/ui/stdmenus.inc

@@ -87,6 +87,7 @@ Menuset
 	End
 
 	Menu "file_export"
+		Item "Export As...|A" "buffer-export-as"
 		ExportFormats
 		Item "More Formats & Options...|O" "buffer-export custom"
 	End

src/FuncCode.h

@@ -450,6 +450,7 @@ enum FuncCode
 	LFUN_SCRIPT_INSERT,             // gb, 20101123
 	// 350
 
+	LFUN_BUFFER_EXPORT_AS,          // tommaso 20111006
 	LFUN_LASTACTION                 // end of the table
 };
 

src/LyXAction.cpp

@@ -2977,6 +2977,14 @@ void LyXAction::init()
  * \endvar
  */
 		{ LFUN_BUFFER_EXPORT_CUSTOM, "buffer-export-custom", ReadOnly, Buffer },
+/*!
+ * \var lyx::FuncCode lyx::LFUN_BUFFER_EXPORT_AS
+ * \li Action: Pops up a dialog for exporting the current buffer.
+ * \li Syntax: buffer-export
+ * \li Origin: tommaso, 6 Oct 2011
+ * \endvar
+ */
+		{ LFUN_BUFFER_EXPORT_AS, "buffer-export-as", ReadOnly, Buffer },
 /*!
  * \var lyx::FuncCode lyx::LFUN_BUFFER_PRINT
  * \li Action: Prints the current document.

src/frontends/qt4/FileDialog.cpp

@@ -81,7 +81,8 @@ void FileDialog::setButton2(QString const & label, QString const & dir)
 
 
 FileDialog::Result FileDialog::save(QString const & path,
-	QStringList const & filters, QString const & suggested)
+	QStringList const & filters, QString const & suggested,
+	QString & selectedFilter)
 {
 	LYXERR(Debug::GUI, "Select with path \"" << path
 			   << "\", mask \"" << filters.join(";;")
@@ -95,7 +96,7 @@ FileDialog::Result FileDialog::save(QString const & path,
 	QString const name = 
 		QFileDialog::getSaveFileName(qApp->focusWidget(),
 	     title_, startsWith, filters.join(";;"),
-			 0, QFileDialog::DontConfirmOverwrite);
+			 selectedFilter, QFileDialog::DontConfirmOverwrite);
 	if (name.isNull())
 		result.first = FileDialog::Later;
 	else
@@ -118,12 +119,21 @@ FileDialog::Result FileDialog::save(QString const & path,
 		result.second = internalPath(dlg.selectedFiles()[0]);
 	else
 		result.first = FileDialog::Later;
+	selectedFilter = dlg.selectedNameFilter();
 	dlg.hide();
 #endif
 	return result;
 }
 
 
+FileDialog::Result FileDialog::save(QString const & path,
+	QStringList const & filters, QString const & suggested)
+{
+	QString selectedFilter = 0;
+	return save(path, filters, suggested, selectedFilter);
+}
+
+
 FileDialog::Result FileDialog::open(QString const & path,
 	QStringList const & filters, QString const & suggested)
 {

src/frontends/qt4/FileDialog.h

@@ -70,6 +70,10 @@ public:
 	Result save(QString const & path, QStringList const & filters,
 			  QString const & suggested = QString());
 
+	/// Also retrieve the selected filter.
+	Result save(QString const & path, QStringList const & filters,
+		    QString const & suggested, QString & selectedFilter);
+
 private:
 	class Private;
 	friend class Private;

src/frontends/qt4/GuiView.cpp

@@ -1657,6 +1657,7 @@ bool GuiView::getStatus(FuncRequest const & cmd, FuncStatus & flag)
 	}
 
 	case LFUN_BUFFER_WRITE_AS:
+	case LFUN_BUFFER_EXPORT_AS:
 		enable = doc_buffer;
 		break;
 
@@ -2313,6 +2314,64 @@ bool GuiView::renameBuffer(Buffer & b, docstring const & newname)
 }
 
 
+bool GuiView::exportBufferAs(Buffer & b)
+{
+	FileName fname = b.fileName();
+	FileName const oldname = fname;
+
+	FileDialog dlg(qt_("Choose a filename to export the document as"));
+	dlg.setButton1(qt_("Documents|#o#O"), toqstr(lyxrc.document_path));
+
+	QStringList types;
+	types << "Any supported format (*.*)";
+	Formats::const_iterator it = formats.begin();
+	for (; it != formats.end(); ++it)
+		if (it->documentFormat())
+			types << toqstr(it->name() + " (*." + it->extension() + ")");
+	QString filter;
+	FileDialog::Result result =
+		dlg.save(toqstr(fname.onlyPath().absFileName()),
+			 types,
+			 toqstr(fname.onlyFileName()),
+			 filter);
+	if (result.first != FileDialog::Chosen)
+		return false;
+
+	string s = fromqstr(filter);
+	size_t pos = s.find(" (");
+	LASSERT(pos != string::npos, /**/);
+	string fmt_name = s.substr(0, pos);
+	fname.set(fromqstr(result.second));
+	if (fmt_name == "Any supported format")
+		fmt_name = formats.getFormatFromExtension(fname.extension());
+	LYXERR(Debug::FILES, "fmt_name=" << fmt_name << ", fname=" << fname.absFileName());
+
+	if (fname.empty())
+		return false;
+
+	// fname is now the new Buffer location.
+	if (FileName(fname).exists()) {
+		docstring const file = makeDisplayPath(fname.absFileName(), 30);
+		docstring text = bformat(_("The document %1$s already "
+					   "exists.\n\nDo you want to "
+					   "overwrite that document?"),
+					 file);
+		int const ret = Alert::prompt(_("Overwrite document?"),
+			text, 0, 2, _("&Overwrite"), _("&Rename"), _("&Cancel"));
+		switch (ret) {
+		case 0: break;
+		case 1: return exportBufferAs(b);
+		case 2: return false;
+		}
+	}
+
+	FuncRequest cmd(LFUN_BUFFER_EXPORT, fmt_name + " " + fname.absFileName());
+	DispatchResult dr;
+	dispatch(cmd, dr);
+	return dr.dispatched();
+}
+
+
 bool GuiView::saveBuffer(Buffer & b) {
 	return saveBuffer(b, FileName());
 }
@@ -3158,6 +3217,11 @@ void GuiView::dispatch(FuncRequest const & cmd, DispatchResult & dr)
 			break;
 		}
 
+		case LFUN_BUFFER_EXPORT_AS:
+			LASSERT(doc_buffer, break);
+			exportBufferAs(*doc_buffer);
+			break;
+
 		case LFUN_BUFFER_UPDATE: {
 			d.asyncBufferProcessing(argument,
 						doc_buffer,

src/frontends/qt4/GuiView.h

@@ -353,6 +353,8 @@ private:
 	///
 	void insertPlaintextFile(docstring const & fname,
 		bool asParagraph);
+	///
+	bool exportBufferAs(Buffer & b);
 
 	/// Save a buffer as a new file. 
 	/**