rely on KFileDialog for automatically adding extension

Otherwise there are two checkboxes, and since it's difficult to get
at the KFileDialog one, just assume it does the right thing (which
additionally makes it consistent with other KDE apps).

fpicker/source/unx/kde4/KDE4FilePicker.cxx

@@ -248,20 +248,6 @@ uno::Sequence< ::rtl::OUString > SAL_CALL KDE4FilePicker::getFiles()
     QStringList rawFiles = _dialog->selectedFiles();
     QStringList files;
 
-    // check if we need to add an extension
-    QString extension = "";
-    if ( _dialog->operationMode() == KFileDialog::Saving )
-    {
-        QCheckBox *cb = dynamic_cast<QCheckBox*> (
-            _customWidgets[ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION ]);
-
-        if (cb && cb->isChecked())
-        {
-            extension = _dialog->currentFilter(); // assuming filter value is like this *.ext
-            extension.replace("*","");
-        }
-    }
-
     // Workaround for the double click selection KDE4 bug
     // kde file picker returns the file and directories for selectedFiles()
     // when a file is double clicked
@@ -288,12 +274,7 @@ uno::Sequence< ::rtl::OUString > SAL_CALL KDE4FilePicker::getFiles()
 
             if (singleFile)
                 filename.prepend(dir + "/");
-
-            //prevent extension append if we already have one
-            if (filename.endsWith(extension))
-                files.append(filename);
-            else
-                files.append(filename + extension);
+            files.append(filename);
         }
     }
 
@@ -381,6 +362,9 @@ void SAL_CALL KDE4FilePicker::setValue( sal_Int16 controlId, sal_Int16, const un
         switch (controlId)
         {
             case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION:
+            // we actually rely on KFileDialog and ignore CHECKBOX_AUTOEXTENSION completely,
+            // otherwise the checkbox would be duplicated
+                break;
             case ExtendedFilePickerElementIds::CHECKBOX_PASSWORD:
             case ExtendedFilePickerElementIds::CHECKBOX_FILTEROPTIONS:
             case ExtendedFilePickerElementIds::CHECKBOX_READONLY:
@@ -417,6 +401,10 @@ uno::Any SAL_CALL KDE4FilePicker::getValue( sal_Int16 controlId, sal_Int16 )
         switch (controlId)
         {
             case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION:
+            // we ignore this one and rely on KFileDialog to provide the function,
+            // always return true, here meaning "it's been taken care of"
+                res = uno::Any( true );
+                break;
             case ExtendedFilePickerElementIds::CHECKBOX_PASSWORD:
             case ExtendedFilePickerElementIds::CHECKBOX_FILTEROPTIONS:
             case ExtendedFilePickerElementIds::CHECKBOX_READONLY:
@@ -463,7 +451,7 @@ void SAL_CALL KDE4FilePicker::setLabel( sal_Int16 controlId, const ::rtl::OUStri
     {
         switch (controlId)
         {
-            case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION:
+            case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION: // ignored
             case ExtendedFilePickerElementIds::CHECKBOX_PASSWORD:
             case ExtendedFilePickerElementIds::CHECKBOX_FILTEROPTIONS:
             case ExtendedFilePickerElementIds::CHECKBOX_READONLY:
@@ -498,7 +486,7 @@ rtl::OUString SAL_CALL KDE4FilePicker::getLabel(sal_Int16 controlId)
     {
         switch (controlId)
         {
-            case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION:
+            case ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION: // ignored
             case ExtendedFilePickerElementIds::CHECKBOX_PASSWORD:
             case ExtendedFilePickerElementIds::CHECKBOX_FILTEROPTIONS:
             case ExtendedFilePickerElementIds::CHECKBOX_READONLY:
@@ -591,6 +579,10 @@ void KDE4FilePicker::addCustomControl(sal_Int16 controlId)
             }
 
             widget = new QCheckBox(label, _extraControls);
+            // the checkbox is created even for CHECKBOX_AUTOEXTENSION to simplify
+            // code, but the checkbox is hidden and ignored
+            if( controlId == ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION )
+                widget->hide();
 
             break;
         }
@@ -654,13 +646,12 @@ void SAL_CALL KDE4FilePicker::initialize( const uno::Sequence<uno::Any> &args )
 
         case FILESAVE_AUTOEXTENSION:
             operationMode = KFileDialog::Saving;
-            //addCustomControl( ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION );
+            addCustomControl( ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION );
             break;
 
         case FILESAVE_AUTOEXTENSION_PASSWORD:
         {
             operationMode = KFileDialog::Saving;
-            //addCustomControl( ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION );
             addCustomControl( ExtendedFilePickerElementIds::CHECKBOX_PASSWORD );
             break;
         }
@@ -680,6 +671,7 @@ void SAL_CALL KDE4FilePicker::initialize( const uno::Sequence<uno::Any> &args )
 
         case FILESAVE_AUTOEXTENSION_TEMPLATE:
             operationMode = KFileDialog::Saving;
+            addCustomControl( ExtendedFilePickerElementIds::CHECKBOX_AUTOEXTENSION );
             addCustomControl( ExtendedFilePickerElementIds::LISTBOX_TEMPLATE );
             break;