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parsers.py: Refactor current_branch == 'all' logic

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Fumens require that all branches have the same length, even when branching isn't
relevant (i.e. at the start of the song before the first BRANCHSTART, or after a
BRANCHEND). So, in the past, I simply duplicated the note data across all branches.

However, this causes a bug when balloon notes are duplicated; we get extra reads of
the BALLOON: field, and the values get mis-attributed. So, we need to be able to
modify this "dummy" note data before it gets duplicated. To do that, we need to rework
the 'current_branch == 'all'` logic to separate out the note data writes for the
other branches, so that we can modify them in-place.
This commit is contained in:
Viv 2024-10-26 10:24:26 -04:00
parent 8e8332cd2b
commit 34428bbbe7
1 changed files with 33 additions and 17 deletions
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44
src/tja2fumen/parsers.py
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@ -207,7 +207,8 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
"""
parsed_branches = {k: [TJAMeasure()] for k in BRANCH_NAMES}
has_branches = bool([d for d in data if d.startswith('#BRANCH')])
current_branch = 'all' if has_branches else 'normal'
current_branch = 'normal'
add_dummy_notes_to_other_branches = has_branches
branch_condition = ''
# Process course lines
@ -229,18 +230,28 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
# If measure has ended, then add notes to the current measure,
# then start a new measure by incrementing idx_m
if note_data.endswith(','):
for branch_name in (BRANCH_NAMES if current_branch == 'all'
else [current_branch]):
check_branch_length(parsed_branches, current_branch, expected_len=idx_m+1)
parsed_branches[current_branch][idx_m].notes += note_data[:-1]
parsed_branches[current_branch].append(TJAMeasure())
# Repeat steps for other branches if we only have info for a single branch
if add_dummy_notes_to_other_branches:
other_branches = list(set(BRANCH_NAMES) - set([current_branch]))
for branch_name in other_branches:
check_branch_length(parsed_branches, branch_name,
expected_len=idx_m+1)
parsed_branches[branch_name][idx_m].notes += note_data[:-1]
dummy_data = note_data[:-1]
parsed_branches[branch_name][idx_m].notes += dummy_data
parsed_branches[branch_name].append(TJAMeasure())
idx_m += 1
# Otherwise, keep adding notes to the current measure ('idx_m')
else:
for branch_name in (BRANCH_NAMES if current_branch == 'all'
else [current_branch]):
parsed_branches[branch_name][idx_m].notes += note_data
parsed_branches[current_branch][idx_m].notes += note_data
# Repeat steps for other branches if we only have info for a single branch
if add_dummy_notes_to_other_branches:
other_branches = list(set(BRANCH_NAMES) - set([current_branch]))
for branch_name in other_branches:
dummy_data = note_data
parsed_branches[branch_name][idx_m].notes += dummy_data
# 2. Parse measure commands that produce an "event"
elif command in ['GOGOSTART', 'GOGOEND', 'BARLINEON', 'BARLINEOFF',
@ -248,7 +259,7 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
'LEVELHOLD', 'SECTION', 'BRANCHSTART']:
# Get position of the event
pos = 0
for branch_name in (BRANCH_NAMES if current_branch == 'all'
for branch_name in (BRANCH_NAMES if add_dummy_notes_to_other_branches
else [current_branch]):
check_branch_length(parsed_branches, branch_name,
expected_len=idx_m+1)
@ -280,17 +291,17 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
# values won't be correctly set for the other two branches.
if data[idx_l+1].startswith('#BRANCHSTART'):
name = 'section'
current_branch = 'all'
add_dummy_notes_to_other_branches = True
elif not branch_condition:
name = 'section'
current_branch = 'all'
add_dummy_notes_to_other_branches = True
# Otherwise, #SECTION exists in isolation. In this case, to
# reset the accuracy, we just repeat the previous #BRANCHSTART.
else:
name, value = 'branch_start', branch_condition
elif command == 'BRANCHSTART':
# Ensure that the #BRANCHSTART command is added to all branches
current_branch = 'all'
add_dummy_notes_to_other_branches = True
name = 'branch_start'
branch_condition = value
# If a branch was intentionally excluded by the charter,
@ -301,7 +312,7 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
idx_m_branchstart = idx_m
# Append event to the current measure's events
for branch_name in (BRANCH_NAMES if current_branch == 'all'
for branch_name in (BRANCH_NAMES if add_dummy_notes_to_other_branches
else [current_branch]):
check_branch_length(parsed_branches, branch_name,
expected_len=idx_m+1)
@ -313,18 +324,23 @@ def parse_tja_course_data(data: List[str]) -> Dict[str, List[TJAMeasure]]:
# (e.g. simply changing the current branch)
else:
if command in ('START', 'END'):
current_branch = 'all' if has_branches else 'normal'
current_branch = 'normal'
add_dummy_notes_to_other_branches = has_branches
elif command == 'N':
current_branch = 'normal'
add_dummy_notes_to_other_branches = False
idx_m = idx_m_branchstart
elif command == 'E':
current_branch = 'professional'
add_dummy_notes_to_other_branches = False
idx_m = idx_m_branchstart
elif command == 'M':
current_branch = 'master'
add_dummy_notes_to_other_branches = False
idx_m = idx_m_branchstart
elif command == 'BRANCHEND':
current_branch = 'all'
current_branch = 'normal'
add_dummy_notes_to_other_branches = True
else:
warnings.warn(f"Ignoring unsupported command '{command}'")