[processing] prevent division by zero in save selected features

alexbruy · alexbruy · commit 8e3e30a20e4f · 2017-04-27T10:58:04.000+03:00
algorithm (fix #16431)
diff --git a/python/plugins/processing/algs/qgis/SaveSelectedFeatures.py b/python/plugins/processing/algs/qgis/SaveSelectedFeatures.py
@@ -26,6 +26,7 @@
 __revision__ = '$Format:%H$'
 
 from processing.core.GeoAlgorithm import GeoAlgorithm
+from processing.core.GeoAlgorithmExecutionException import GeoAlgorithmExecutionException
 from processing.core.parameters import ParameterVector
 from processing.core.outputs import OutputVector
 from processing.tools import dataobjects
@@ -56,6 +57,9 @@ def processAlgorithm(self, progress):
                                         vectorLayer.wkbType(), vectorLayer.crs())
 
         features = vectorLayer.selectedFeaturesIterator()
+        if vectorLayer.selectedFeatureCount() == 0:
+            raise GeoAlgorithmExecutionException(self.tr('There are no selected features in the input layer.'))
+
         total = 100.0 / int(vectorLayer.selectedFeatureCount())
         for current, feat in enumerate(features):
             writer.addFeature(feat)
