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neaten up add_reference method

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This commit is contained in:
Paul Franklin 2015-01-31 16:55:22 -08:00
parent 331ea351a2
commit 46146a4893
1 changed files with 11 additions and 8 deletions
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17
gramps/gen/plug/report/_bibliography.py
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@ -87,27 +87,30 @@ class Citation(object):
:return: The key of the added reference among all the references.
:rtype: char
"""
letter_count = len(string.ascii_lowercase)
letters = string.ascii_lowercase # or (e.g.) "abcdef" for testing
letter_count = len(letters)
ref_count = len(self.__ref_list)
x_ref_count = ref_count
# Return "a" for ref_count = 0, otherwise log(0) does not work
if ref_count == 0:
self.__ref_list.append(("a", source_ref))
return "a"
last_letter = string.ascii_lowercase[ ref_count % letter_count ]
self.__ref_list.append((letters[0], source_ref))
return letters[0]
last_letter = letters[ ref_count % letter_count ]
key = ""
# Calculate prek number of digits.
number_of_letters = int(math.log(float(ref_count), float(letter_count)))+1
number_of_letters = 1 + int(math.log(float(ref_count),
float(letter_count)))
# Exclude index for number_of_letters-1
for n in range(1, number_of_letters-1):
ref_count -= pow(letter_count, n)
# Adjust number_of_letters for new index
number_of_letters = int(math.log(float(ref_count), float(letter_count))) +1
number_of_letters = 1 + int(math.log(float(ref_count),
float(letter_count)))
for n in range(1, number_of_letters):
x_ref_count -= pow(letter_count, n)
for letter in range(1, number_of_letters):
index = x_ref_count // pow(letter_count, letter) % letter_count
key += string.ascii_lowercase[ index ]
key += letters[index]
key = key + last_letter
self.__ref_list.append((key, source_ref))
return key