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Modify tokenizer to parse notes

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This commit is contained in:
Bartłomiej Pluta
2019-07-05 18:36:12 +02:00
parent ad19e851ec
commit 425d23eb5f
9 changed files with 70 additions and 101 deletions
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2
smnp/token/model.py
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@@ -4,7 +4,7 @@ class Token:
self.value = value
self.pos = pos
def __str__(self):
return "Token(" + str(self.type) + ", '" + self.value + "', " + str(self.pos) + ")"
return "Token(" + str(self.type) + ", '" + str(self.value) + "', " + str(self.pos) + ")"
def __repr__(self):
return self.__str__()

37
smnp/token/tokenizers/note.py
View File

@@ -1,37 +1,44 @@
import re
from smnp.token.type import TokenType
from smnp.note.model import Note
from smnp.token.model import Token
from smnp.token.type import TokenType
def tokenizeNote(input, current, line):
consumedChars = 0
value = ''
notePitch = None
octave = None
duration = None
dot = False
if input[current] == '@':
consumedChars += 1
value += input[current]
if input[current+consumedChars] in ('C', 'c', 'D', 'd', 'E', 'e', 'F', 'f', 'G', 'g', 'A', 'a', 'H', 'h', 'B', 'b'):
value += input[current+consumedChars]
notePitch = input[current+consumedChars]
consumedChars += 1
if current+consumedChars < len(input) and input[current+consumedChars] in ('b', '#'):
value += input[current+consumedChars]
notePitch += input[current+consumedChars]
consumedChars += 1
if current+consumedChars < len(input) and re.match(r'\d', input[current+consumedChars]):
value += input[current+consumedChars]
octave = input[current+consumedChars]
consumedChars += 1
if current+consumedChars < len(input) and input[current+consumedChars] == '.':
duration = input[current+consumedChars]
if current+consumedChars < len(input) and input[current+consumedChars] == '.':
duration = ''
consumedChars += 1
while current+consumedChars < len(input) and re.match(r'\d', input[current+consumedChars]):
duration += input[current+consumedChars]
consumedChars += 1
if current+consumedChars < len(input) and input[current+consumedChars] == 'd':
duration += input[current+consumedChars]
consumedChars += 1
if len(duration) > 1:
value += duration
else:
consumedChars -= 1
if len(duration) == 0:
return (0, None)
dot = (current+consumedChars) < len(input) and input[current+consumedChars] == 'd'
consumedChars += 1
octave = int(octave) if octave is not None else None
duration = int(duration) if duration is not None else None
value = Note(notePitch, octave, duration, dot)
return (consumedChars, Token(TokenType.NOTE, value, (line, current)))
return (0, None)