Inheritance diagram for IcuCollation:

Collaboration diagram for IcuCollation:

Public Member Functions
	__construct ($locale)
	findLowerBound ($valueCallback, $valueCount, $comparisonCallback, $target)
	Do a binary search, and return the index of the largest item that sorts less than or equal to the target value.
	getFirstLetter ($string)
	Given a string, return the logical "first letter" to be used for grouping on category pages and so on.
	getFirstLetterCount ()
	getFirstLetterData ()
	getLetterByIndex ($index)
	getPrimarySortKey ($string)
	getSortKey ($string)
	Given a string, convert it to a (hopefully short) key that can be used for efficient sorting.
	getSortKeyByLetterIndex ($index)
Static Public Member Functions
static	getICUVersion ()
	Return the version of ICU library used by PHP's intl extension, or false when the extension is not installed of the version can't be determined.
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.
static	isCjk ($codepoint)
Public Attributes
	$firstLetterData
	$locale
	$mainCollator
	$primaryCollator
const	FIRST_LETTER_VERSION = 1
const	RECORD_LENGTH = 14
Static Public Attributes
static	$cjkBlocks
	Unified CJK blocks.
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 '-').

Detailed Description

Definition at line 151 of file Collation.php.

Constructor & Destructor Documentation

IcuCollation::__construct ( $ locale )

Definition at line 282 of file Collation.php.

References $locale.

Member Function Documentation

IcuCollation::findLowerBound	(	$	valueCallback,
		$	valueCount,
		$	comparisonCallback,
		$	target
	)

Do a binary search, and return the index of the largest item that sorts less than or equal to the target value.

Parameters:

array	$valueCallback	A function to call to get the value with a given array index.
int	$valueCount	The number of items accessible via $valueCallback, indexed from 0 to $valueCount - 1
array	$comparisonCallback	A callback to compare two values, returning -1, 0 or 1 in the style of strcmp().
string	$target	The target value to find.

Returns:: int|bool The item index of the lower bound, or false if the target value sorts before all items.

Definition at line 517 of file Collation.php.

Referenced by 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.

Parameters:

string $string UTF-8 string

Returns:: string UTF-8 string corresponding to the first letter of input

Reimplemented from Collation.

Definition at line 314 of file Collation.php.

References array(), findLowerBound(), getFirstLetterCount(), getLetterByIndex(), getPrimarySortKey(), and utf8ToCodepoint().

IcuCollation::getFirstLetterCount ( )

Definition at line 495 of file Collation.php.

References getFirstLetterData().

Referenced by getFirstLetter().

IcuCollation::getFirstLetterData ( )

Definition at line 344 of file Collation.php.

References $cache, $key, $value, array(), as, getPrimarySortKey(), wfDebug(), wfGetCache(), wfGetPrecompiledData(), and wfMemcKey().

Referenced by getFirstLetterCount(), getLetterByIndex(), and getSortKeyByLetterIndex().

static IcuCollation::getICUVersion ( ) [static]

Return the version of ICU library used by PHP's intl extension, or false when the extension is not installed of the version can't be determined.

The constant INTL_ICU_VERSION this function refers to isn't really documented. It is available since PHP 5.3.7 (see PHP bug 54561). This function will return false on older PHPs.

Since:: 1.21

Returns:: string|false

Definition at line 570 of file Collation.php.

Referenced by GenerateCollationData\execute(), and getUnicodeVersionForICU().

IcuCollation::getLetterByIndex ( $ index )

Definition at line 481 of file Collation.php.

References getFirstLetterData().

Referenced by getFirstLetter().

IcuCollation::getPrimarySortKey ( $ string )

Definition at line 307 of file Collation.php.

References $key, wfRestoreWarnings(), and wfSuppressWarnings().

Referenced by getFirstLetter(), and getFirstLetterData().

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).

Parameters:

string $string UTF-8 string

Returns:: string Binary sortkey

Reimplemented from Collation.

Definition at line 297 of file Collation.php.

References $key, wfRestoreWarnings(), and wfSuppressWarnings().

IcuCollation::getSortKeyByLetterIndex ( $ index )

Definition at line 488 of file Collation.php.

References getFirstLetterData().

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|false

Definition at line 581 of file Collation.php.

References array(), and getICUVersion().

Referenced by GenerateCollationData\execute().

static IcuCollation::isCjk ( $ codepoint ) [static]

Definition at line 549 of file Collation.php.

References as.

Referenced by GenerateCollationData\charCallback().

Member Data Documentation

IcuCollation::$cjkBlocks [static]

Initial value:

 array(
        array( 0x2E80, 0x2EFF ), 
        array( 0x2F00, 0x2FDF ), 
        array( 0x2FF0, 0x2FFF ), 
        array( 0x3000, 0x303F ), 
        array( 0x31C0, 0x31EF ), 
        array( 0x3200, 0x32FF ), 
        array( 0x3300, 0x33FF ), 
        array( 0x3400, 0x4DBF ), 
        array( 0x4E00, 0x9FFF ), 
        array( 0xF900, 0xFAFF ), 
        array( 0xFE30, 0xFE4F ), 
        array( 0x20000, 0x2A6DF ), 
        array( 0x2A700, 0x2B73F ), 
        array( 0x2B740, 0x2B81F ), 
        array( 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 166 of file Collation.php.

IcuCollation::$firstLetterData

Definition at line 155 of file Collation.php.

IcuCollation::$locale

Definition at line 154 of file Collation.php.

Referenced by __construct().

IcuCollation::$mainCollator

Definition at line 154 of file Collation.php.

IcuCollation::$primaryCollator

Definition at line 154 of file Collation.php.

IcuCollation::$tailoringFirstLetters [static]

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.ser 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 205 of file Collation.php.

const IcuCollation::FIRST_LETTER_VERSION = 1

Definition at line 152 of file Collation.php.

const IcuCollation::RECORD_LENGTH = 14

Definition at line 280 of file Collation.php.

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

includes/Collation.php

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation