def rule_9(l, r):
"""
Rule for "Āgạmạ"
L[C1] + R → L[C1|u]R
L[C1] + R → L[C1|i]R
L[C1|V1] + [V2]R → L[C1|V1][C3|V2]R
Where C3 = { y, v, r }
:return:
"""
lef, rgt = l, r
l_suffix = utils.endswith(lef, letters.CONSONANTS)
if l_suffix is not None:
return [
lef[:-len(l_suffix)] + l_suffix[0] + letters.DIACRITICS_MAPPING['උ'] + rgt,
lef[:-len(l_suffix)] + l_suffix[0] + letters.DIACRITICS_MAPPING['ඉ'] + rgt,
]
l_suffix = utils.endswith(lef, letters.COMBINED_LETTERS)
r_prefix = utils.startswith(rgt, letters.VOWELS)
if l_suffix is not None and r_prefix is not None:
outputs = [lef + c3 + letters.DIACRITICS_MAPPING[r_prefix] + rgt[len(r_prefix):] for c3 in ['ව', 'ය', 'ර']]
if len(l_suffix) > 1 and l_suffix[1] in letters.LONG_TO_SHORT_VOWEL_DIACRITICS_MAPPING:
outputs.extend(
[
lef[:-1] +
letters.LONG_TO_SHORT_VOWEL_DIACRITICS_MAPPING[l_suffix[1]] +
c3 +
letters.DIACRITICS_MAPPING[r_prefix] +
rgt[len(r_prefix):] for c3 in ['ව', 'ය', 'ර']
]
)
return outputs
return None
def rule_5(l, r):
"""
Rule for "Gatrādeshạ"
L[C1|V1] + [C2|V2]R → L[C1|V1][C3|V2]R; Where C3 is a member of {y, v, h, k, t, p, n, m}
:return:
"""
lcom_suffix = utils.endswith(l, letters.COMBINED_LETTERS)
l_suffix = utils.endswith(l, letters.REVERSE_DIACRITICS_MAPPING)
v_suffix = letters.REVERSE_DIACRITICS_MAPPING[l_suffix]
c_prefix = utils.startswith(r, letters.BASE_CONSONANTS)
lft, rht = l, r
outputs = []
if v_suffix is not None and c_prefix == 'ක':
rht = rht[len(c_prefix):]
c_prefix = 'ය'
outputs.append(lft + c_prefix + rht)
c_prefix = 'ව'
outputs.append(lft + c_prefix + rht)
if lcom_suffix is not None:
if lcom_suffix[0] == 'බ':
lft = lft[:-len(lcom_suffix)]
lcom_suffix = 'ප්'
outputs.append(lft + lcom_suffix + rht)
elif lcom_suffix[0] == 'ද':
lft = lft[:-len(lcom_suffix)]
lcom_suffix = 'ත්'
outputs.append(lft + lcom_suffix + rht)
return outputs
def rule_4(l, r):
"""
Rule for "Swạrādeshạ"
L[C1|a] + [i]R → L[C1|e]R
L[C1|a] + [u]R → L[C1|o]R
L[C1|a] + [u]R → L[C1|ō]R
L[C1|e] + [a]R → L[C1|ā]R
:return:
"""
c_suffix = utils.endswith(l, letters.REVERSE_DIACRITICS_MAPPING)
v_prefix = utils.startswith(r, letters.VOWELS)
if c_suffix is not None and v_prefix is not None:
rgt = r[len(v_prefix):]
if letters.REVERSE_DIACRITICS_MAPPING[c_suffix] == 'අ':
lef = l
if v_prefix == 'ඉ':
c1 = 'එ',
elif v_prefix == 'උ':
c1 = 'ඔ', 'ඕ'
else:
return None
elif letters.REVERSE_DIACRITICS_MAPPING[c_suffix] == 'එ':
lef = l[:-len(c_suffix)]
if v_prefix == 'අ':
c1 = 'ඈ',
else:
return None
else:
return None
else:
return None
return [lef + letters.DIACRITICS_MAPPING[c2] + rgt for c2 in c1]
def rule_12(l, r):
"""
Rule for "svara sandhi - guṇa sandhiya"
:return:
"""
l_suffix = utils.endswith(l, ['', 'ා'])
r_prefix = utils.startswith(r, ['ඉ', 'ඊ'])
if l_suffix is not None:
if r_prefix is not None:
if l_suffix == '':
return [l + v3 + r[len(r_prefix):] for v3 in ['ෙ', 'ේ']]
return [l[:-len(l_suffix)] + v3 + r[len(r_prefix):] for v3 in ['ෙ', 'ේ']]
# l_suffix = utils.endswith(l, ['', 'ා'])
r_prefix = utils.startswith(r, ['උ', 'ඌ'])
if r_prefix is not None:
if l_suffix == '':
return [l + v3 + r[len(r_prefix):] for v3 in ['ො', 'ෝ']]
return [l[:-len(l_suffix)] + v3 + r[len(r_prefix):] for v3 in ['ො', 'ෝ']]
# l_suffix = utils.endswith(l, ['', 'ා'])
r_prefix = utils.startswith(r, ['ඍ'])
if r_prefix is not None:
if l_suffix == '':
return l + 'ර්' + r[len(r_prefix):]
return l[:-len(l_suffix)] + 'ර්' + r[len(r_prefix):]
def rule_18(l, r):
"""
Rule for "vyaṁjana sandhi - dvitva rūpaya"
:return:
"""
l_suffix = utils.endswith(l, letters.VOWEL_DIACRITICS)
r_prefix = utils.startswith(r, ['ඡ'])
if l_suffix is not None and r_prefix is not None:
return l + 'ච්' + r
def rule_18(l, r):
"""
Rule for "vyaṁjana sandhi - nāsikyakaraṇaya"
:return:
"""
l_suffix = utils.endswith(l, letters.AGOSHA_LETTERS)
r_prefix = utils.startswith(r, ['ඞ', 'ඤ', 'ණ', 'න', 'ම'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + letters.AGOSHA_TO_GOSHA_MAPPING[l_suffix] + r
def rule_18(l, r):
"""
Rule for "vyaṁjana sandhi - pārśvīkaraṇaya"
:return:
"""
l_suffix = utils.endswith(l, ['ත්'])
r_prefix = utils.startswith(r, ['ල'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + 'ල්' + r
def rule_15(l, r):
"""
Rule for "svara sandhi - ardha svara bhāva sandhiya"
:return:
"""
l_suffix = utils.endswith(l, ['ි', 'ී'])
r_prefix = utils.startswith(r, ['අ', 'ආ', 'ඇ', 'ඈ', 'උ', 'ඌ', 'ඍ', 'ඎ', 'එ', 'ඒ', 'ඓ', 'ඔ', 'ඕ', 'ඖ'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + '්ය' + letters.DIACRITICS_MAPPING[r_prefix] + r[len(r_prefix):]
l_suffix = utils.endswith(l, ['ු', 'ූ'])
r_prefix = utils.startswith(r, ['අ', 'ආ', 'ඇ', 'ඈ', 'ඉ', 'ඊ', 'ඍ', 'ඎ', 'එ', 'ඒ', 'ඓ', 'ඔ', 'ඕ', 'ඖ'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + '්ව' + letters.DIACRITICS_MAPPING[r_prefix] + r[len(r_prefix):]
l_suffix = utils.endswith(l, ['ෘ'])
r_prefix = utils.startswith(r, ['අ', 'ආ', 'ඇ', 'ඈ', 'ඉ', 'ඊ', 'උ', 'ඌ', 'එ', 'ඒ', 'ඓ', 'ඔ', 'ඕ', 'ඖ'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + '්ර' + letters.DIACRITICS_MAPPING[r_prefix] + r[len(r_prefix):]
def rule_17(l, r):
"""
Rule for "vyaṁjana sandhi - talujikaraṇaya"
:return:
"""
l_suffix = utils.endswith(l, ['ත්'])
r_prefix = utils.startswith(r, ['ච', 'ඡ', 'ජ', 'ඣ', 'ශ'])
if l_suffix is not None and r_prefix is not None:
if r_prefix == 'ශ':
return l[:-len(l_suffix)] + 'ච්ඡ' + r[len(r_prefix):]
return l[:-len(l_suffix)] + 'ච්' + r
def rule_6(l, r):
"""
Rule for "Pūrwạ Rūpạ"
L[C1] + [C2|V2]R → L[C1][C1|V2]R
:return:
"""
lef, rgt = l, r
c_suffix = utils.endswith(l, letters.COMBINED_LETTERS)
rgt = rgt[1:]
if c_suffix is not None:
return lef + c_suffix[0] + rgt
return None
def rule_16(l, r):
"""
Rule for "vyaṁjana sandhi - ghośī karaṇaya"
:return:
"""
l_suffix = utils.endswith(l, letters.AGOSHA_LETTERS)
r_prefix = utils.startswith(r, letters.GOSHA_LETTERS)
if l_suffix is not None and r_prefix is not None:
if r_prefix in letters.VOWELS:
return l[:-len(l_suffix)] + letters.AGOSHA_TO_GOSHA_MAPPING[l_suffix][0] + \
letters.DIACRITICS_MAPPING[r_prefix] + r[len(r_prefix):]
return l[:-len(l_suffix)] + letters.AGOSHA_TO_GOSHA_MAPPING[l_suffix] + r
def rule_11(l, r):
"""
Rule for "svara sandhi - svarṇa svara dīrghaya"
:return:
"""
l_suffix = utils.endswith(l, ['', 'ා'])
r_prefix = utils.startswith(r, ['අ', 'ආ'])
if l_suffix is not None and r_prefix is not None:
if l_suffix == '':
return l + 'ා' + r[len(r_prefix):]
return l + r[len(r_prefix):]
l_suffix = utils.endswith(l, ['ි', 'ී'])
r_prefix = utils.startswith(r, ['ඉ', 'ඊ'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + 'ී' + r[len(r_prefix):]
l_suffix = utils.endswith(l, ['ු', 'ූ'])
r_prefix = utils.startswith(r, ['උ', 'ඌ'])
if l_suffix is not None and r_prefix is not None:
return l[:-len(l_suffix)] + 'ූ' + r[len(r_prefix):]
def rule_7(l, r):
"""
Rule for "Parạ Rūpạ"
L[C1] + [C2|V2]R → L[C2][C2|V2]R
:return:
"""
lef, rgt = l, r
r_prefix = utils.startswith(r, letters.COMBINED_LETTERS)
l_suffix = utils.endswith(l, letters.COMBINED_LETTERS)
if r_prefix is not None and l_suffix is not None:
lef = lef[:-len(l_suffix)]
l_suffix = r_prefix[0] + l_suffix[1:]
return lef + l_suffix + rgt
return None
def rule_14(l, r):
"""
Rule for "svara sandhi - vṛddhi samāhāra sandhiya"
:return:
"""
l_suffix = utils.endswith(l, ['', 'ා'])
if l_suffix is not None:
r_prefix = utils.startswith(r, ['ඓ'])
if r_prefix is not None:
if l_suffix == '':
return l + 'ෛ' + r[len(r_prefix):]
return l[:-len(l_suffix)] + 'ෛ' + r[len(r_prefix):]
r_prefix = utils.startswith(r, ['ඖ'])
if r_prefix is not None:
if l_suffix == '':
return l + 'ෞ' + r[len(r_prefix):]
return l[:-len(l_suffix)] + 'ෞ' + r[len(r_prefix):]
def rule_2(l, r):
"""
Rule for "Parạ Swạrạ Lōpạ"
TODO: Check whether this rule is correct
L[C1|V1] + [V2]R → L[C1+V2]R
:return:
"""
c_suffix = utils.endswith(l, letters.COMBINED_LETTERS)
if c_suffix is not None:
c1 = c_suffix
lef = l[:-len(c_suffix)]
else:
return None
v_prefix = utils.startswith(r, letters.VOWELS)
if v_prefix:
rgt = r[len(v_prefix):]
else:
return None
return lef + c1 + rgt
def rule_1(l, r):
"""
Rule for "Pūrwạ Swạrạ Lōpạ"
L1[C1|V1] + [V2]R1 → L1[C1|V2]R1
:return:
"""
c_suffix = utils.endswith(l, letters.COMBINED_LETTERS)
if c_suffix is not None:
c1 = c_suffix[0]
lef = l[:-len(c_suffix)]
else:
return None
v_prefix = utils.startswith(r, letters.VOWELS)
if v_prefix:
v2 = v_prefix
rgt = r[len(v_prefix):]
else:
return None
return lef + c1 + letters.DIACRITICS_MAPPING[v2] + rgt
def rule_0(l, r):
"""
Rule for "Swạrạ"
L[C1] + [V1]R → L[C1|V1]R
:return:
"""
c_suffix = utils.endswith(l, letters.CONSONANTS)
if c_suffix is not None:
c1 = c_suffix[0]
lef = l[:-len(c_suffix)]
else:
return None
v_prefix = utils.startswith(r, letters.VOWELS)
if v_prefix:
v2 = v_prefix
rgt = r[len(v_prefix):]
else:
return None
return lef + c1 + letters.DIACRITICS_MAPPING[v2] + rgt
def rule_10(l, r):
"""
Rule for "Dwitwạ Rūpạ"
L[C1|V1] + [V2]R → L[C1][C1|V2]R
L[C1|V1] + [C1|V2]R → L[C1|v1][C1][C1|V2]R
:return:
"""
lef, rgt = l, r
l_suffix = utils.endswith(lef, letters.COMBINED_LETTERS)
r_prefix = utils.startswith(rgt, letters.VOWELS)
if l_suffix is not None and r_prefix is not None:
return lef[:-len(l_suffix)] + l_suffix[0] + '්' + l_suffix[0] + letters.DIACRITICS_MAPPING[r_prefix] + rgt[
len(
r_prefix):]
r_prefix = utils.startswith(rgt, letters.COMBINED_LETTERS)
if l_suffix is not None and r_prefix is not None:
return lef + r_prefix[0] + '්' + rgt
return None
def rule_8(l, r):
"""
Rule for "Gatrākshạrạ Lōpạ"
# todo: is this rule correct?
L[ n ] + [C2|V2]R → L[ ňg |V2]R
L[ n ] + [C2|V2]R → L[ ňb |V2]R
:return:
"""
lef, rgt = l, r
l_suffix = utils.endswith(lef, letters.COMBINED_SAN)
if l_suffix is not None:
c1 = l_suffix[0]
lef = lef[:-len(l_suffix)]
l_suffix_san = letters.SAN_MAPPING[c1]
lef += l_suffix_san[:-1]
# r_prefix = utils.endswith(lef, letters.COMBINED_LETTERS)
# v2 = r_prefix[1:]
return lef + rgt
return None