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NumericUppercaseCollation Class Reference

Collation that orders text with numbers "naturally", so that 'Foo 1' < 'Foo 2' < 'Foo 12'. More...

Inheritance diagram for NumericUppercaseCollation:
Collaboration diagram for NumericUppercaseCollation:

Public Member Functions

 __construct (LanguageFactory $languageFactory, $digitTransformLang)
 
 getFirstLetter ( $string)
 Given a string, return the logical "first letter" to be used for grouping on category pages and so on. More...
 
 getSortKey ( $string)
 Given a string, convert it to a (hopefully short) key that can be used for efficient sorting. More...
 
- Public Member Functions inherited from UppercaseCollation
 __construct (LanguageFactory $languageFactory)
 
- Public Member Functions inherited from Collation
 getSortKeys ( $strings)
 Get multiple sort keys. More...
 

Additional Inherited Members

- Static Public Member Functions inherited from Collation
static factory ( $collationName)
 
static singleton ()
 

Detailed Description

Collation that orders text with numbers "naturally", so that 'Foo 1' < 'Foo 2' < 'Foo 12'.

Note that this only works in terms of sequences of digits, and the behavior for decimal fractions or pretty-formatted numbers may be unexpected.

Digits will be based on the wiki's content language settings. If you change the content language of a wiki you will need to run updateCollation.php –force. Only English (ASCII 0-9) and the localized version will be counted. Localized digits from other languages or weird unicode digit equivalents (e.g. 4, 𝟜, ⓸ , ⁴, etc) will not count.

Since
1.28

Definition at line 37 of file NumericUppercaseCollation.php.

Constructor & Destructor Documentation

◆ __construct()

NumericUppercaseCollation::__construct ( LanguageFactory  $languageFactory,
  $digitTransformLang 
)
Parameters
LanguageFactory$languageFactory
string | Language$digitTransformLangHow to convert digits. For example, if given language "my" than ၇ is treated like 7. It is expected that usually this is given the content language.

Definition at line 50 of file NumericUppercaseCollation.php.

References MediaWiki\Languages\LanguageFactory\getLanguage().

Member Function Documentation

◆ getFirstLetter()

NumericUppercaseCollation::getFirstLetter (   $string)

Given a string, return the logical "first letter" to be used for grouping on category pages and so on.

This has to be coordinated carefully with convertToSortkey(), or else the sorted list might jump back and forth between the same "initial letters" or other pathological behavior. For instance, if you just return the first character, but "a" sorts the same as "A" based on getSortKey(), then you might get a list like

== A ==

  • [[Aardvark]]

== a ==

  • [[antelope]]

== A ==

  • [[Ape]]

etc., assuming for the sake of argument that $wgCapitalLinks is false.

Since
1.16.3
Parameters
string$stringUTF-8 string
Returns
string UTF-8 string corresponding to the first letter of input

Reimplemented from UppercaseCollation.

Reimplemented in CustomUppercaseCollation.

Definition at line 101 of file NumericUppercaseCollation.php.

References wfMessage().

◆ getSortKey()

NumericUppercaseCollation::getSortKey (   $string)

Given a string, convert it to a (hopefully short) key that can be used for efficient sorting.

A binary sort according to the sortkeys corresponds to a logical sort of the corresponding strings. Current code expects that a line feed character should sort before all others, but has no other particular expectations (and that one can be changed if necessary).

Since
1.16.3
Parameters
string$stringUTF-8 string
Returns
string Binary sortkey

Reimplemented from UppercaseCollation.

Reimplemented in CustomUppercaseCollation.

Definition at line 60 of file NumericUppercaseCollation.php.

References $matches.


The documentation for this class was generated from the following file: