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<?php
/**
* Provide things related to namespaces
* @file
*/
/**
* Definitions of the NS_ constants are in Defines.php
* @private
*/
$wgCanonicalNamespaceNames = array(
NS_MEDIA => 'Media',
NS_SPECIAL => 'Special',
NS_TALK => 'Talk',
NS_USER => 'User',
NS_USER_TALK => 'User_talk',
NS_PROJECT => 'Project',
NS_PROJECT_TALK => 'Project_talk',
NS_FILE => 'File',
NS_FILE_TALK => 'File_talk',
NS_MEDIAWIKI => 'MediaWiki',
NS_MEDIAWIKI_TALK => 'MediaWiki_talk',
NS_TEMPLATE => 'Template',
NS_TEMPLATE_TALK => 'Template_talk',
NS_HELP => 'Help',
NS_HELP_TALK => 'Help_talk',
NS_CATEGORY => 'Category',
NS_CATEGORY_TALK => 'Category_talk',
);
if( isset( $wgExtraNamespaces ) && is_array( $wgExtraNamespaces ) ) {
$wgCanonicalNamespaceNames = $wgCanonicalNamespaceNames + $wgExtraNamespaces;
}
/**
* This is a utility class with only static functions
* for dealing with namespaces that encodes all the
* "magic" behaviors of them based on index. The textual
* names of the namespaces are handled by Language.php.
*
* These are synonyms for the names given in the language file
* Users and translators should not change them
*
*/
class MWNamespace {
/**
* These namespaces should always be first-letter capitalized, now and
* forevermore. Historically, they could've probably been lowercased too,
* but some things are just too ingrained now. :)
*/
private static $alwaysCapitalizedNamespaces = array( NS_SPECIAL, NS_USER, NS_MEDIAWIKI );
/**
* Can pages in the given namespace be moved?
*
* @param $index Int: namespace index
* @return bool
*/
public static function isMovable( $index ) {
global $wgAllowImageMoving;
return !( $index < NS_MAIN || ($index == NS_FILE && !$wgAllowImageMoving) || $index == NS_CATEGORY );
}
/**
* Is the given namespace is a subject (non-talk) namespace?
*
* @param $index Int: namespace index
* @return bool
*/
public static function isMain( $index ) {
return !self::isTalk( $index );
}
/**
* Is the given namespace a talk namespace?
*
* @param $index Int: namespace index
* @return bool
*/
public static function isTalk( $index ) {
return $index > NS_MAIN
&& $index % 2;
}
/**
* Get the talk namespace index for a given namespace
*
* @param $index Int: namespace index
* @return int
*/
public static function getTalk( $index ) {
return self::isTalk( $index )
? $index
: $index + 1;
}
/**
* Get the subject namespace index for a given namespace
*
* @param $index Int: Namespace index
* @return int
*/
public static function getSubject( $index ) {
return self::isTalk( $index )
? $index - 1
: $index;
}
/**
* Returns whether the specified namespace exists
*/
public static function exists( $index ) {
global $wgCanonicalNamespaceNames;
return isset( $wgCanonicalNamespaceNames[$index] );
}
/**
* Returns the canonical (English Wikipedia) name for a given index
*
* @param $index Int: namespace index
* @return string or false if no canonical definition.
*/
public static function getCanonicalName( $index ) {
global $wgCanonicalNamespaceNames;
if( isset( $wgCanonicalNamespaceNames[$index] ) ) {
return $wgCanonicalNamespaceNames[$index];
} else {
return false;
}
}
/**
* Returns the index for a given canonical name, or NULL
* The input *must* be converted to lower case first
*
* @param $name String: namespace name
* @return int
*/
public static function getCanonicalIndex( $name ) {
global $wgCanonicalNamespaceNames;
static $xNamespaces = false;
if ( $xNamespaces === false ) {
$xNamespaces = array();
foreach ( $wgCanonicalNamespaceNames as $i => $text ) {
$xNamespaces[strtolower($text)] = $i;
}
}
if ( array_key_exists( $name, $xNamespaces ) ) {
return $xNamespaces[$name];
} else {
return null;
}
}
/**
* Can this namespace ever have a talk namespace?
*
* @param $index Int: namespace index
* @return bool
*/
public static function canTalk( $index ) {
return $index >= NS_MAIN;
}
/**
* Does this namespace contain content, for the purposes of calculating
* statistics, etc?
*
* @param $index Int: index to check
* @return bool
*/
public static function isContent( $index ) {
global $wgContentNamespaces;
return $index == NS_MAIN || in_array( $index, $wgContentNamespaces );
}
/**
* Can pages in a namespace be watched?
*
* @param $index Int
* @return bool
*/
public static function isWatchable( $index ) {
return $index >= NS_MAIN;
}
/**
* Does the namespace allow subpages?
*
* @param $index int Index to check
* @return bool
*/
public static function hasSubpages( $index ) {
global $wgNamespacesWithSubpages;
return !empty( $wgNamespacesWithSubpages[$index] );
}
/**
* Is the namespace first-letter capitalized?
*
* @param $index int Index to check
* @return bool
*/
public static function isCapitalized( $index ) {
global $wgCapitalLinks, $wgCapitalLinkOverrides;
// Turn NS_MEDIA into NS_FILE
$index = $index === NS_MEDIA ? NS_FILE : $index;
// Make sure to get the subject of our namespace
$index = self::getSubject( $index );
// Some namespaces are special and should always be upper case
if ( in_array( $index, self::$alwaysCapitalizedNamespaces ) ) {
return true;
}
if ( isset( $wgCapitalLinkOverrides[ $index ] ) ) {
// $wgCapitalLinkOverrides is explicitly set
return $wgCapitalLinkOverrides[ $index ];
}
// Default to the global setting
return $wgCapitalLinks;
}
}
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