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Add a function to generation collation order for partitioning

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Kovid Goyal 2021-10-24 15:46:31 +05:30
parent ff32d7c4f8
commit 79a6ab5d94
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1 changed files with 14 additions and 3 deletions
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17
src/calibre/utils/icu.py
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@ -13,7 +13,7 @@ from calibre.utils.config_base import tweaks
from calibre_extensions import icu as _icu
from polyglot.builtins import cmp
_locale = _collator = _primary_collator = _sort_collator = _numeric_collator = _case_sensitive_collator = None
_locale = _collator = _primary_collator = _sort_collator = _non_numeric_sort_collator = _numeric_collator = _case_sensitive_collator = None
cmp
_none = ''
@ -67,8 +67,8 @@ def collator():
def change_locale(locale=None):
global _locale, _collator, _primary_collator, _sort_collator, _numeric_collator, _case_sensitive_collator
_collator = _primary_collator = _sort_collator = _numeric_collator = _case_sensitive_collator = None
global _locale, _collator, _primary_collator, _sort_collator, _numeric_collator, _case_sensitive_collator, _non_numeric_sort_collator
_collator = _primary_collator = _sort_collator = _numeric_collator = _case_sensitive_collator = _non_numeric_sort_collator = None
_locale = locale
@ -91,6 +91,16 @@ def sort_collator():
return _sort_collator
def non_numeric_sort_collator():
'Ignores case differences only'
global _non_numeric_sort_collator
if _non_numeric_sort_collator is None:
_non_numeric_sort_collator = collator().clone()
_non_numeric_sort_collator.strength = _icu.UCOL_SECONDARY
_sort_collator.numeric = False
return _sort_collator
def numeric_collator():
'Uses natural sorting for numbers inside strings so something2 will sort before something10'
global _numeric_collator
@ -191,6 +201,7 @@ numeric_sort_key = make_sort_key_func(numeric_collator)
primary_sort_key = make_sort_key_func(primary_collator)
case_sensitive_sort_key = make_sort_key_func(case_sensitive_collator)
collation_order = make_sort_key_func(sort_collator, 'collation_order')
collation_order_for_partitioning = make_sort_key_func(non_numeric_sort_collator, 'collation_order')
strcmp = make_two_arg_func(sort_collator)
case_sensitive_strcmp = make_two_arg_func(case_sensitive_collator)