def _perform_mapping_pre_processing(consonants, vowels, akhand,
composite_letters, various_signs):
"""
Sets of all consonants and vowel *characters* (not maatras).
This list is used for the vowel idiosyncracy where 'LETTER A' is placed
explicitly if a consonant is followed by a vowel character
(not a vowel sign, which is a 'maatra')
See: insert_explicit_schwa()
"""
all_consonants = set()
for each in consonants, akhand, composite_letters:
for value in each.values():
all_consonants.update(value)
vowel_chars = set()
all_consonants_and_vowels = set(all_consonants)
for value in vowels.values():
all_consonants_and_vowels.update(value)
length = len(value)
# We assume here that the first value is a vowel char, the second is a
# vowel sign, and that there are no more than two values
if length == 2:
vowel_chars.add(value[0])
elif length > 2:
raise Exception(
"Expected each Braille vowel to map from 2 vowels, but it's mapping from more than 2:\n{0}"
.format(vowels))
# Reverse all the braille-to-indic mappings from mappings.py
# We need a indic-to-bharati-braille mapping for each type of mapping
indic_to_bb = {}
for (braille, indic_list) in vowels.items() | consonants.items() | \
various_signs.items() | dashes.items():
for each in indic_list:
indic_to_bb[each] = braille
indic_to_bb_composite = {}
for (braille,
devanagari_list) in akhand.items() | composite_letters.items():
for each in devanagari_list:
indic_to_bb_composite[each] = braille
return (all_consonants, frozenset(all_consonants_and_vowels), vowel_chars,
indic_to_bb, indic_to_bb_composite)
def _perform_mapping_pre_processing(consonants, vowels, akhand, composite_letters, various_signs):
"""
Sets of all consonants and vowel *characters* (not maatras).
This list is used for the vowel idiosyncracy where 'LETTER A' is placed
explicitly if a consonant is followed by a vowel character
(not a vowel sign, which is a 'maatra')
See: insert_explicit_schwa()
"""
all_consonants = set()
for each in consonants, akhand, composite_letters:
for value in each.values():
all_consonants.update(value)
vowel_chars = set()
all_consonants_and_vowels = set(all_consonants)
for value in vowels.values():
all_consonants_and_vowels.update(value)
length = len(value)
# We assume here that the first value is a vowel char, the second is a
# vowel sign, and that there are no more than two values
if length == 2:
vowel_chars.add(value[0])
elif length > 2:
raise Exception("Expected each Braille vowel to map from 2 vowels, but it's mapping from more than 2:\n{0}".format(vowels))
# Reverse all the braille-to-indic mappings from mappings.py
# We need a indic-to-bharati-braille mapping for each type of mapping
indic_to_bb = {}
for (braille, indic_list) in vowels.items() | consonants.items() | \
various_signs.items() | dashes.items():
for each in indic_list:
indic_to_bb[each] = braille
indic_to_bb_composite = {}
for (braille, devanagari_list) in akhand.items() | composite_letters.items():
for each in devanagari_list:
indic_to_bb_composite[each] = braille
return (all_consonants, frozenset(all_consonants_and_vowels),
vowel_chars, indic_to_bb, indic_to_bb_composite)
# Set of all numbers. Used in translate_math()
number_chars = set()
for value in numbers.values():
number_chars.update(value)
# Set of all math symbols
all_math_symbols = set()
for value in math_symbols.values():
all_math_symbols.update(value)
# Reverse all the bharati-braille-to-glyph mappings from mappings.py
# We need a glyph-to-bharati-braille mapping for each type of mapping
# This section converts all the characters common for all Indic scripts
cm_to_bb_punctuation = {}
for (braille, devanagari_list) in punctuation.items() | \
paired_punctuation.items() | dashes.items():
for each in devanagari_list:
cm_to_bb_punctuation[each] = braille
cm_to_bb_numbers = {}
for (braille, devanagari_list) in numbers.items():
for each in devanagari_list:
cm_to_bb_numbers[each] = braille
cm_to_bb_math_punctuation = {}
for (braille, devanagari_list) in math_punctuation.items():
for each in devanagari_list:
cm_to_bb_math_punctuation[each] = braille
####################
# BEGIN INDIC #
# PRE-PROCESSING #
####################
# Set of all numbers. Used in translate_math()
number_chars = set()
for value in numbers.values():
number_chars.update(value)
# Set of all math symbols
all_math_symbols = set()
for value in math_symbols.values():
all_math_symbols.update(value)
# Reverse all the bharati-braille-to-glyph mappings from mappings.py
# We need a glyph-to-bharati-braille mapping for each type of mapping
# This section converts all the characters common for all Indic scripts
cm_to_bb_punctuation = {}
for (braille, devanagari_list) in punctuation.items() | \
paired_punctuation.items() | dashes.items():
for each in devanagari_list:
cm_to_bb_punctuation[each] = braille
cm_to_bb_numbers = {}
for (braille, devanagari_list) in numbers.items():
for each in devanagari_list:
cm_to_bb_numbers[each] = braille
cm_to_bb_math_punctuation = {}
for (braille, devanagari_list) in math_punctuation.items():
for each in devanagari_list:
cm_to_bb_math_punctuation[each] = braille
####################
# BEGIN INDIC #
# PRE-PROCESSING #
####################
