Change stringTunings from list of semitones to list of pitches

[lilypond.git] / python / convertrules.py

diff --git a/python/convertrules.py b/python/convertrules.py
index e17095c3884f4fea0c1c053a303c2bdc99f62bf1..06e144a23f020902af4345b8d39caceeee1744d3 100644 (file)
--- a/python/convertrules.py
+++ b/python/convertrules.py
@@ -3123,11 +3123,45 @@ def conv(str):
     return str
 
 @rule ((2, 13, 44),
-    _ ("Remove context from overrideTimeSignatureSettings and revertTimeSignatureSettings."))
+    _ ("Remove context from overrideTimeSignatureSettings and revertTimeSignatureSettings.\n"))
+
 def conv(str):
     str = re.sub (r"\\(override|revert)TimeSignatureSettings(\s+[^#]*)(#[^#]*)#", r"\\\1TimeSignatureSettings\2#", str)
     return str
 
+@rule ((2, 13, 46),
+    _ ("Change stringTunings from a list of semitones to a list of pitches.\n"\
+       "Change tenor and baritone ukulele names in string tunings."))
+
+def conv(str):
+    def semitones2pitch(semitones):
+       steps = [0, 0, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6]
+       alterations = ["NATURAL", "SHARP", "NATURAL", "SHARP", "NATURAL", "NATURAL", "SHARP", "NATURAL", "SHARP", "NATURAL", "SHARP", "NATURAL"]
+       octave = 0
+       while semitones > 11:
+           octave += 1
+           semitones -=12
+       while semitones < 0:
+           octave -= 1
+           semitones += 12
+       pitchArgs = "%d %d %s" % (octave, steps[semitones], alterations[semitones])
+       return pitchArgs
+
+    def convert_tones (semitone_list):
+       tones = semitone_list.split ()
+       res = ""
+       for tone in tones:
+           args = semitones2pitch(int(tone))
+           res += ",(ly:make-pitch " + args + ") "
+       return res
+
+    def new_tunings (matchobj):
+       return "stringTunings = #`(" + convert_tones(matchobj.group(1)) + ")"
+    str = re.sub (r"stringTunings\s*=\s*#'\(([\d\s-]*)\)", \
+          new_tunings , str)
+
+    str = re.sub (r"ukulele-(tenor|baritone)-tuning", r"\1-ukulele-tuning", str)
+    return str
 
 # Guidelines to write rules (please keep this at the end of this file)
 #