Cleanup

generator/arrange/ending_plan.py

@@ -0,0 +1,22 @@
+"""Source-derived ending geometry, independent of instrument composition."""
+import copy
+import fractions
+
+import generator.model
+
+BARS = 3
+
+def template(source):
+  result = copy.deepcopy(source[-1])
+  # An ending is three full bars in the final active meter, never a pickup.
+  for change in result.get('attributes', []):
+    for key in ('meter', 'key', 'clef', 'transpose', 'staff_details'):
+      if key in change:
+        result[key] = copy.deepcopy(change[key])
+  result.update(duration=generator.model.rational(generator.model.meter_length(result['meter'])), implicit=False,
+    attributes=[], harmonies=[], voices=[], tempos=[], section_label='')
+  result['time_signature'] = generator.model.meter_label(result['meter'])
+  return result
+
+def duration(source):
+  return BARS * generator.model.fraction(template(source)['duration']) if source else fractions.Fraction()