+ }
+ return result;
+ }
+
+ /**
+ * Removes from the list of features any whose group is not shown, or that are
+ * visible and duplicate the location of a visible feature of the same type.
+ * Should be used only for features of the same, simple, feature colour (which
+ * normally implies the same feature type). No filtering is done if
+ * transparency, or any feature filters, are in force.
+ *
+ * @param features
+ */
+ public void filterFeaturesForDisplay(List<SequenceFeature> features)
+ {
+ /*
+ * don't remove 'redundant' features if
+ * - transparency is applied (feature count affects depth of feature colour)
+ * - filters are applied (not all features may be displayable)
+ */
+ if (features.isEmpty() || transparency != 1f
+ || !featureFilters.isEmpty())
+ {
+ return;
+ }
+
+ SequenceFeatures.sortFeatures(features, true);
+ SequenceFeature lastFeature = null;
+
+ Iterator<SequenceFeature> it = features.iterator();
+ while (it.hasNext())
+ {
+ SequenceFeature sf = it.next();
+ if (featureGroupNotShown(sf))
+ {
+ it.remove();
+ continue;
+ }
+
+ /*
+ * a feature is redundant for rendering purposes if it has the
+ * same extent as another (so would just redraw the same colour);
+ * (checking type and isContactFeature as a fail-safe here, although
+ * currently they are guaranteed to match in this context)
+ */
+ if (lastFeature != null
+ && sf.getBegin() == lastFeature.getBegin()
+ && sf.getEnd() == lastFeature.getEnd()
+ && sf.isContactFeature() == lastFeature.isContactFeature()
+ && sf.getType().equals(lastFeature.getType()))