def __init__(self, maxspines = 0):
self.events = common.defList()
self.lastEvents = common.defList()
self.maxspines = maxspines
self.spinePathData = False
def parseProtoSpines(self, protoSpines):
maxSpines = len(protoSpines)
currentSpineList = common.defList(default = None)
spineCollection = SpineCollection()
for i in range(0, self.fileLength):
thisEventCollection = self.eventCollections[i]
for j in range(0, maxSpines):
thisEvent = protoSpines[j].eventList[i]
if thisEvent is not None: # something there
currentSpine = currentSpineList[j]
if currentSpine is None:
## first event after a None = new spine because
## Humdrum does not require *+ at the beginning
currentSpine = spineCollection.addSpine()
currentSpine.beginningPosition = i
currentSpineList[j] = currentSpine
currentSpine.append(thisEvent)
thisEvent.protoSpineNum = currentSpine.id
'''
Now we check for spinePathData (from HumdrumDoc):
*+ add a new spine (to the right of the current spine)
*- terminate a current spine
*^ split a spine (into two)
*v join (two or more) spines into one
*x exchange the position of two spines
* do nothing
'''
if thisEventCollection.spinePathData is True:
newSpineList = common.defList()
mergerActive = False
exchangeActive = False
for j in range(0, maxSpines):
thisEvent = protoSpines[j].eventList[i]
currentSpine = currentSpineList[j]
if thisEvent is None and currentSpine is not None:
## should this happen?
newSpineList.append(currentSpine)
elif thisEvent is None:
continue
elif thisEvent.contents == "*-": ## terminate spine
currentSpine.endingPosition = i
elif thisEvent.contents == "*^": ## split spine
newSpine1 = spineCollection.addSpine()
newSpine1.beginningPosition = i+1
newSpine1.upstream = [currentSpine.id]
newSpine2 = spineCollection.addSpine()
newSpine2.beginningPosition = i+1
newSpine2.upstream = [currentSpine.id]
currentSpine.endingPosition = i
currentSpine.downstream = [newSpine1.id, newSpine2.id]
newSpineList.append(newSpine1)
newSpineList.append(newSpine2)
elif thisEvent.contents == "*v": #merge spine -- n.b. we allow non-adjacent lines to be merged this is incorrect
if mergerActive is False: # per humdrum syntax, but is easily done.
mergeSpine = spineCollection.addSpine()
mergeSpine.beginningPosition = i+1
mergeSpine.upstream = [currentSpine.id]
mergerActive = mergeSpine
currentSpine.endingPosition = i
currentSpine.downstream = [mergeSpine.id]
newSpineList.append(mergeSpine)
else: ## if second merger code is not found then a 1-1 spine "merge" occurs
mergeSpine = mergerActive
currentSpine.endingPosition = i
currentSpine.downstream = [mergeSpine.id]
mergeSpine.upstream.append(currentSpine.id)
elif thisEvent.contents == "*x": # exchange spine
if exchangeActive is False:
exchangeActive = currentSpine
else: ## if second exchange is not found, then both lines disappear and exception is raised
## n.b. we allow more than one PAIR of exchanges in a line
newSpineList.append(currentSpine)
newSpineList.append(exchangeActive)
exchangeActive = False;
else: ## null processing code "*"
newSpineList.append(currentSpine)
if exchangeActive is not False:
raise HumdrumException("Protospine found with unpaired exchange instruction")
currentSpineList = newSpineList
return spineCollection
