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IcuCollation Class Reference
Inheritance diagram for IcuCollation:
Collaboration diagram for IcuCollation:

Public Member Functions

 __construct ( $locale)
 
 getFirstLetter ( $string)
 Given a string, return the logical "first letter" to be used for grouping on category pages and so on. More...
 
 getFirstLetterCount ()
 
 getFirstLetterData ()
 
 getLetterByIndex ( $index)
 
 getPrimarySortKey ( $string)
 
 getSortKey ( $string)
 Given a string, convert it to a (hopefully short) key that can be used for efficient sorting. More...
 
 getSortKeyByLetterIndex ( $index)
 

Static Public Member Functions

static getUnicodeVersionForICU ()
 Return the version of Unicode appropriate for the version of ICU library currently in use, or false when it can't be determined. More...
 
static isCjk ( $codepoint)
 Test if a code point is a CJK (Chinese, Japanese, Korean) character. More...
 
- Static Public Member Functions inherited from Collation
static factory ( $collationName)
 
static singleton ()
 

Protected Attributes

Language $digitTransformLanguage
 

Private Member Functions

 fetchFirstLetterData ()
 

Private Attributes

array $firstLetterData
 
string $locale
 
Collator $mainCollator
 
Collator $primaryCollator
 
bool $useNumericCollation = false
 
const FIRST_LETTER_VERSION = 4
 

Static Private Attributes

static $cjkBlocks
 Unified CJK blocks. More...
 
static $tailoringFirstLetters
 Additional characters (or character groups) to be considered separate letters for given languages, or to be removed from the list of such letters (denoted by keys starting with '-'). More...
 

Detailed Description

Since
1.16.3

Definition at line 26 of file IcuCollation.php.

Constructor & Destructor Documentation

◆ __construct()

IcuCollation::__construct (   $locale)

Definition at line 244 of file IcuCollation.php.

References $locale.

Member Function Documentation

◆ fetchFirstLetterData()

IcuCollation::fetchFirstLetterData ( )
private
Returns
array
Exceptions
MWException

Definition at line 349 of file IcuCollation.php.

References $IP, getPrimarySortKey(), wfDebug(), and wfGetPrecompiledData().

Referenced by getFirstLetterData().

◆ getFirstLetter()

IcuCollation::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 Collation.

Definition at line 282 of file IcuCollation.php.

References ArrayUtils\findLowerBound(), getFirstLetterCount(), getLetterByIndex(), getPrimarySortKey(), and wfMessage().

◆ getFirstLetterCount()

IcuCollation::getFirstLetterCount ( )
Returns
int
Since
1.16.3

Definition at line 508 of file IcuCollation.php.

References getFirstLetterData().

Referenced by getFirstLetter().

◆ getFirstLetterData()

IcuCollation::getFirstLetterData ( )

◆ getLetterByIndex()

IcuCollation::getLetterByIndex (   $index)
Parameters
string$index
Returns
string
Since
1.16.3

Definition at line 491 of file IcuCollation.php.

References getFirstLetterData().

Referenced by getFirstLetter().

◆ getPrimarySortKey()

IcuCollation::getPrimarySortKey (   $string)

Definition at line 278 of file IcuCollation.php.

Referenced by fetchFirstLetterData(), and getFirstLetter().

◆ getSortKey()

IcuCollation::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 Collation.

Definition at line 274 of file IcuCollation.php.

◆ getSortKeyByLetterIndex()

IcuCollation::getSortKeyByLetterIndex (   $index)
Parameters
string$index
Returns
string
Since
1.16.3

Definition at line 500 of file IcuCollation.php.

References getFirstLetterData().

◆ getUnicodeVersionForICU()

static IcuCollation::getUnicodeVersionForICU ( )
static

Return the version of Unicode appropriate for the version of ICU library currently in use, or false when it can't be determined.

Since
1.21
Returns
string|bool

Definition at line 534 of file IcuCollation.php.

Referenced by GenerateCollationData\execute().

◆ isCjk()

static IcuCollation::isCjk (   $codepoint)
static

Test if a code point is a CJK (Chinese, Japanese, Korean) character.

Parameters
int$codepoint
Returns
bool
Since
1.16.3

Definition at line 518 of file IcuCollation.php.

Referenced by GenerateCollationData\charCallback().

Member Data Documentation

◆ $cjkBlocks

IcuCollation::$cjkBlocks
staticprivate
Initial value:
= [
[ 0x2E80, 0x2EFF ],
[ 0x2F00, 0x2FDF ],
[ 0x2FF0, 0x2FFF ],
[ 0x3000, 0x303F ],
[ 0x31C0, 0x31EF ],
[ 0x3200, 0x32FF ],
[ 0x3300, 0x33FF ],
[ 0x3400, 0x4DBF ],
[ 0x4E00, 0x9FFF ],
[ 0xF900, 0xFAFF ],
[ 0xFE30, 0xFE4F ],
[ 0x20000, 0x2A6DF ],
[ 0x2A700, 0x2B73F ],
[ 0x2B740, 0x2B81F ],
[ 0x2F800, 0x2FA1F ],
]

Unified CJK blocks.

The same definition of a CJK block must be used for both Collation and generateCollationData.php. These blocks are omitted from the first letter data, as an optimisation measure and because the default UCA table is pretty useless for sorting Chinese text anyway. Japanese and Korean blocks are not included here, because they are smaller and more useful.

Definition at line 56 of file IcuCollation.php.

◆ $digitTransformLanguage

Language IcuCollation::$digitTransformLanguage
protected

Definition at line 39 of file IcuCollation.php.

◆ $firstLetterData

array IcuCollation::$firstLetterData
private

Definition at line 45 of file IcuCollation.php.

Referenced by getFirstLetterData().

◆ $locale

string IcuCollation::$locale
private

Definition at line 36 of file IcuCollation.php.

Referenced by __construct().

◆ $mainCollator

Collator IcuCollation::$mainCollator
private

Definition at line 33 of file IcuCollation.php.

◆ $primaryCollator

Collator IcuCollation::$primaryCollator
private

Definition at line 30 of file IcuCollation.php.

◆ $tailoringFirstLetters

IcuCollation::$tailoringFirstLetters
staticprivate

Additional characters (or character groups) to be considered separate letters for given languages, or to be removed from the list of such letters (denoted by keys starting with '-').

These are additions to (or subtractions from) the data stored in the first-letters-root.php data file (which among others includes full basic Latin, Cyrillic and Greek alphabets).

"Separate letter" is a letter that would have a separate heading/section for it in a dictionary or a phone book in this language. This data isn't used for sorting (the ICU library handles that), only for deciding which characters (or character groups) to use as headings.

Initially generated based on the primary level of Unicode collation tailorings available at http://developer.mimer.com/charts/tailorings.htm , later modified.

Empty arrays are intended; this signifies that the data for the language is available and that there are, in fact, no additional letters to consider.

Definition at line 95 of file IcuCollation.php.

◆ $useNumericCollation

bool IcuCollation::$useNumericCollation = false
private

Definition at line 42 of file IcuCollation.php.

◆ FIRST_LETTER_VERSION

const IcuCollation::FIRST_LETTER_VERSION = 4
private

Definition at line 27 of file IcuCollation.php.


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