Preferences.php

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<?php
class Preferences {
    static $defaultPreferences = null;
    static $saveFilters = array(
            'timecorrection' => array( 'Preferences', 'filterTimezoneInput' ),
            'cols' => array( 'Preferences', 'filterIntval' ),
            'rows' => array( 'Preferences', 'filterIntval' ),
            'rclimit' => array( 'Preferences', 'filterIntval' ),
            'wllimit' => array( 'Preferences', 'filterIntval' ),
            'searchlimit' => array( 'Preferences', 'filterIntval' ),
    );
 
    // Stuff that shouldn't be saved as a preference.
    private static $saveBlacklist = array(
        'realname',
        'emailaddress',
    );
 
    static function getSaveBlacklist() {
        return self::$saveBlacklist;
    }
 
    static function getPreferences( $user, IContextSource $context ) {
        if ( self::$defaultPreferences ) {
            return self::$defaultPreferences;
        }
 
        $defaultPreferences = array();
 
        self::profilePreferences( $user, $context, $defaultPreferences );
        self::skinPreferences( $user, $context, $defaultPreferences );
        self::datetimePreferences( $user, $context, $defaultPreferences );
        self::filesPreferences( $user, $context, $defaultPreferences );
        self::renderingPreferences( $user, $context, $defaultPreferences );
        self::editingPreferences( $user, $context, $defaultPreferences );
        self::rcPreferences( $user, $context, $defaultPreferences );
        self::watchlistPreferences( $user, $context, $defaultPreferences );
        self::searchPreferences( $user, $context, $defaultPreferences );
        self::miscPreferences( $user, $context, $defaultPreferences );
 
        wfRunHooks( 'GetPreferences', array( $user, &$defaultPreferences ) );
 
        ## Remove preferences that wikis don't want to use
        global $wgHiddenPrefs;
        foreach ( $wgHiddenPrefs as $pref ) {
            if ( isset( $defaultPreferences[$pref] ) ) {
                unset( $defaultPreferences[$pref] );
            }
        }
 
        ## Make sure that form fields have their parent set. See bug 41337.
        $dummyForm = new HTMLForm( array(), $context );
 
        $disable = !$user->isAllowed( 'editmyoptions' );
 
        ## Prod in defaults from the user
        foreach ( $defaultPreferences as $name => &$info ) {
            $prefFromUser = self::getOptionFromUser( $name, $info, $user );
            if ( $disable && !in_array( $name, self::$saveBlacklist ) ) {
                $info['disabled'] = 'disabled';
            }
            $field = HTMLForm::loadInputFromParameters( $name, $info ); // For validation
            $field->mParent = $dummyForm;
            $defaultOptions = User::getDefaultOptions();
            $globalDefault = isset( $defaultOptions[$name] )
                ? $defaultOptions[$name]
                : null;
 
            // If it validates, set it as the default
            if ( isset( $info['default'] ) ) {
                // Already set, no problem
                continue;
            } elseif ( !is_null( $prefFromUser ) && // Make sure we're not just pulling nothing
                    $field->validate( $prefFromUser, $user->getOptions() ) === true ) {
                $info['default'] = $prefFromUser;
            } elseif ( $field->validate( $globalDefault, $user->getOptions() ) === true ) {
                $info['default'] = $globalDefault;
            } else {
                throw new MWException( "Global default '$globalDefault' is invalid for field $name" );
            }
        }
 
        self::$defaultPreferences = $defaultPreferences;
 
        return $defaultPreferences;
    }
 
    static function getOptionFromUser( $name, $info, $user ) {
        $val = $user->getOption( $name );
 
        // Handling for multiselect preferences
        if ( ( isset( $info['type'] ) && $info['type'] == 'multiselect' ) ||
                ( isset( $info['class'] ) && $info['class'] == 'HTMLMultiSelectField' ) ) {
            $options = HTMLFormField::flattenOptions( $info['options'] );
            $prefix = isset( $info['prefix'] ) ? $info['prefix'] : $name;
            $val = array();
 
            foreach ( $options as $value ) {
                if ( $user->getOption( "$prefix$value" ) ) {
                    $val[] = $value;
                }
            }
        }
 
        // Handling for checkmatrix preferences
        if ( ( isset( $info['type'] ) && $info['type'] == 'checkmatrix' ) ||
                ( isset( $info['class'] ) && $info['class'] == 'HTMLCheckMatrix' ) ) {
            $columns = HTMLFormField::flattenOptions( $info['columns'] );
            $rows = HTMLFormField::flattenOptions( $info['rows'] );
            $prefix = isset( $info['prefix'] ) ? $info['prefix'] : $name;
            $val = array();
 
            foreach ( $columns as $column ) {
                foreach ( $rows as $row ) {
                    if ( $user->getOption( "$prefix$column-$row" ) ) {
                        $val[] = "$column-$row";
                    }
                }
            }
        }
 
        return $val;
    }
 
    static function profilePreferences( $user, IContextSource $context, &$defaultPreferences ) {
        global $wgAuth, $wgContLang, $wgParser, $wgCookieExpiration, $wgLanguageCode,
            $wgDisableLangConversion, $wgMaxSigChars,
            $wgEnableEmail, $wgEmailConfirmToEdit, $wgEnableUserEmail, $wgEmailAuthentication,
            $wgEnotifWatchlist, $wgEnotifUserTalk, $wgEnotifRevealEditorAddress,
            $wgSecureLogin;
 
        // retrieving user name for GENDER and misc.
        $userName = $user->getName();
 
        ## User info #####################################
        // Information panel
        $defaultPreferences['username'] = array(
            'type' => 'info',
            'label-message' => array( 'username', $userName ),
            'default' => $userName,
            'section' => 'personal/info',
        );
 
        $defaultPreferences['userid'] = array(
            'type' => 'info',
            'label-message' => array( 'uid', $userName ),
            'default' => $user->getId(),
            'section' => 'personal/info',
        );
 
        # Get groups to which the user belongs
        $userEffectiveGroups = $user->getEffectiveGroups();
        $userGroups = $userMembers = array();
        foreach ( $userEffectiveGroups as $ueg ) {
            if ( $ueg == '*' ) {
                // Skip the default * group, seems useless here
                continue;
            }
            $groupName = User::getGroupName( $ueg );
            $userGroups[] = User::makeGroupLinkHTML( $ueg, $groupName );
 
            $memberName = User::getGroupMember( $ueg, $userName );
            $userMembers[] = User::makeGroupLinkHTML( $ueg, $memberName );
        }
        asort( $userGroups );
        asort( $userMembers );
 
        $lang = $context->getLanguage();
 
        $defaultPreferences['usergroups'] = array(
            'type' => 'info',
            'label' => $context->msg( 'prefs-memberingroups' )->numParams(
                count( $userGroups ) )->params( $userName )->parse(),
            'default' => $context->msg( 'prefs-memberingroups-type',
                $lang->commaList( $userGroups ),
                $lang->commaList( $userMembers )
            )->plain(),
            'raw' => true,
            'section' => 'personal/info',
        );
 
        $editCount = Linker::link( SpecialPage::getTitleFor( "Contributions", $userName ),
            $lang->formatNum( $user->getEditCount() ) );
 
        $defaultPreferences['editcount'] = array(
            'type' => 'info',
            'raw' => true,
            'label-message' => 'prefs-edits',
            'default' => $editCount,
            'section' => 'personal/info',
        );
 
        if ( $user->getRegistration() ) {
            $displayUser = $context->getUser();
            $userRegistration = $user->getRegistration();
            $defaultPreferences['registrationdate'] = array(
                'type' => 'info',
                'label-message' => 'prefs-registration',
                'default' => $context->msg(
                    'prefs-registration-date-time',
                    $lang->userTimeAndDate( $userRegistration, $displayUser ),
                    $lang->userDate( $userRegistration, $displayUser ),
                    $lang->userTime( $userRegistration, $displayUser )
                )->parse(),
                'section' => 'personal/info',
            );
        }
 
        $canViewPrivateInfo = $user->isAllowed( 'viewmyprivateinfo' );
        $canEditPrivateInfo = $user->isAllowed( 'editmyprivateinfo' );
 
        // Actually changeable stuff
        $defaultPreferences['realname'] = array(
            // (not really "private", but still shouldn't be edited without permission)
            'type' => $canEditPrivateInfo && $wgAuth->allowPropChange( 'realname' ) ? 'text' : 'info',
            'default' => $user->getRealName(),
            'section' => 'personal/info',
            'label-message' => 'yourrealname',
            'help-message' => 'prefs-help-realname',
        );
 
        if ( $canEditPrivateInfo && $wgAuth->allowPasswordChange() ) {
            $link = Linker::link( SpecialPage::getTitleFor( 'ChangePassword' ),
                $context->msg( 'prefs-resetpass' )->escaped(), array(),
                array( 'returnto' => SpecialPage::getTitleFor( 'Preferences' )->getPrefixedText() ) );
 
            $defaultPreferences['password'] = array(
                'type' => 'info',
                'raw' => true,
                'default' => $link,
                'label-message' => 'yourpassword',
                'section' => 'personal/info',
            );
        }
        // Only show prefershttps if secure login is turned on
        if ( $wgSecureLogin && wfCanIPUseHTTPS( $context->getRequest()->getIP() ) ) {
            $defaultPreferences['prefershttps'] = array(
                'type' => 'toggle',
                'label-message' => 'tog-prefershttps',
                'help-message' => 'prefs-help-prefershttps',
                'section' => 'personal/info'
            );
        }
 
        // Language
        $languages = Language::fetchLanguageNames( null, 'mw' );
        if ( !array_key_exists( $wgLanguageCode, $languages ) ) {
            $languages[$wgLanguageCode] = $wgLanguageCode;
        }
        ksort( $languages );
 
        $options = array();
        foreach ( $languages as $code => $name ) {
            $display = wfBCP47( $code ) . ' - ' . $name;
            $options[$display] = $code;
        }
        $defaultPreferences['language'] = array(
            'type' => 'select',
            'section' => 'personal/i18n',
            'options' => $options,
            'label-message' => 'yourlanguage',
        );
 
        $defaultPreferences['gender'] = array(
            'type' => 'radio',
            'section' => 'personal/i18n',
            'options' => array(
                $context->msg( 'parentheses',
                    $context->msg( 'gender-unknown' )->text()
                )->text() => 'unknown',
                $context->msg( 'gender-female' )->text() => 'female',
                $context->msg( 'gender-male' )->text() => 'male',
            ),
            'label-message' => 'yourgender',
            'help-message' => 'prefs-help-gender',
        );
 
        // see if there are multiple language variants to choose from
        if ( !$wgDisableLangConversion ) {
            foreach ( LanguageConverter::$languagesWithVariants as $langCode ) {
                if ( $langCode == $wgContLang->getCode() ) {
                    $variants = $wgContLang->getVariants();
 
                    if ( count( $variants ) <= 1 ) {
                        continue;
                    }
 
                    $variantArray = array();
                    foreach ( $variants as $v ) {
                        $v = str_replace( '_', '-', strtolower( $v ) );
                        $variantArray[$v] = $lang->getVariantname( $v, false );
                    }
 
                    $options = array();
                    foreach ( $variantArray as $code => $name ) {
                        $display = wfBCP47( $code ) . ' - ' . $name;
                        $options[$display] = $code;
                    }
 
                    $defaultPreferences['variant'] = array(
                        'label-message' => 'yourvariant',
                        'type' => 'select',
                        'options' => $options,
                        'section' => 'personal/i18n',
                        'help-message' => 'prefs-help-variant',
                    );
                } else {
                    $defaultPreferences["variant-$langCode"] = array(
                        'type' => 'api',
                    );
                }
            }
        }
 
        // Stuff from Language::getExtraUserToggles()
        // FIXME is this dead code? $extraUserToggles doesn't seem to be defined for any language
        $toggles = $wgContLang->getExtraUserToggles();
 
        foreach ( $toggles as $toggle ) {
            $defaultPreferences[$toggle] = array(
                'type' => 'toggle',
                'section' => 'personal/i18n',
                'label-message' => "tog-$toggle",
            );
        }
 
        // show a preview of the old signature first
        $oldsigWikiText = $wgParser->preSaveTransform(
            '~~~',
            $context->getTitle(),
            $user,
            ParserOptions::newFromContext( $context )
        );
        $oldsigHTML = $context->getOutput()->parseInline( $oldsigWikiText, true, true );
        $defaultPreferences['oldsig'] = array(
            'type' => 'info',
            'raw' => true,
            'label-message' => 'tog-oldsig',
            'default' => $oldsigHTML,
            'section' => 'personal/signature',
        );
        $defaultPreferences['nickname'] = array(
            'type' => $wgAuth->allowPropChange( 'nickname' ) ? 'text' : 'info',
            'maxlength' => $wgMaxSigChars,
            'label-message' => 'yournick',
            'validation-callback' => array( 'Preferences', 'validateSignature' ),
            'section' => 'personal/signature',
            'filter-callback' => array( 'Preferences', 'cleanSignature' ),
        );
        $defaultPreferences['fancysig'] = array(
            'type' => 'toggle',
            'label-message' => 'tog-fancysig',
            // show general help about signature at the bottom of the section
            'help-message' => 'prefs-help-signature',
            'section' => 'personal/signature'
        );
 
        ## Email stuff
 
        if ( $wgEnableEmail ) {
            if ( $canViewPrivateInfo ) {
                $helpMessages[] = $wgEmailConfirmToEdit
                        ? 'prefs-help-email-required'
                        : 'prefs-help-email';
 
                if ( $wgEnableUserEmail ) {
                    // additional messages when users can send email to each other
                    $helpMessages[] = 'prefs-help-email-others';
                }
 
                $emailAddress = $user->getEmail() ? htmlspecialchars( $user->getEmail() ) : '';
                if ( $canEditPrivateInfo && $wgAuth->allowPropChange( 'emailaddress' ) ) {
                    $link = Linker::link(
                        SpecialPage::getTitleFor( 'ChangeEmail' ),
                        $context->msg( $user->getEmail() ? 'prefs-changeemail' : 'prefs-setemail' )->escaped(),
                        array(),
                        array( 'returnto' => SpecialPage::getTitleFor( 'Preferences' )->getPrefixedText() ) );
 
                    $emailAddress .= $emailAddress == '' ? $link : (
                        $context->msg( 'word-separator' )->plain()
                        . $context->msg( 'parentheses' )->rawParams( $link )->plain()
                    );
                }
 
                $defaultPreferences['emailaddress'] = array(
                    'type' => 'info',
                    'raw' => true,
                    'default' => $emailAddress,
                    'label-message' => 'youremail',
                    'section' => 'personal/email',
                    'help-messages' => $helpMessages,
                    # 'cssclass' chosen below
                );
            }
 
            $disableEmailPrefs = false;
 
            if ( $wgEmailAuthentication ) {
                $emailauthenticationclass = 'mw-email-not-authenticated';
                if ( $user->getEmail() ) {
                    if ( $user->getEmailAuthenticationTimestamp() ) {
                        // date and time are separate parameters to facilitate localisation.
                        // $time is kept for backward compat reasons.
                        // 'emailauthenticated' is also used in SpecialConfirmemail.php
                        $displayUser = $context->getUser();
                        $emailTimestamp = $user->getEmailAuthenticationTimestamp();
                        $time = $lang->userTimeAndDate( $emailTimestamp, $displayUser );
                        $d = $lang->userDate( $emailTimestamp, $displayUser );
                        $t = $lang->userTime( $emailTimestamp, $displayUser );
                        $emailauthenticated = $context->msg( 'emailauthenticated',
                            $time, $d, $t )->parse() . '<br />';
                        $disableEmailPrefs = false;
                        $emailauthenticationclass = 'mw-email-authenticated';
                    } else {
                        $disableEmailPrefs = true;
                        $emailauthenticated = $context->msg( 'emailnotauthenticated' )->parse() . '<br />' .
                            Linker::linkKnown(
                                SpecialPage::getTitleFor( 'Confirmemail' ),
                                $context->msg( 'emailconfirmlink' )->escaped()
                            ) . '<br />';
                        $emailauthenticationclass = "mw-email-not-authenticated";
                    }
                } else {
                    $disableEmailPrefs = true;
                    $emailauthenticated = $context->msg( 'noemailprefs' )->escaped();
                    $emailauthenticationclass = 'mw-email-none';
                }
 
                if ( $canViewPrivateInfo ) {
                    $defaultPreferences['emailauthentication'] = array(
                        'type' => 'info',
                        'raw' => true,
                        'section' => 'personal/email',
                        'label-message' => 'prefs-emailconfirm-label',
                        'default' => $emailauthenticated,
                        # Apply the same CSS class used on the input to the message:
                        'cssclass' => $emailauthenticationclass,
                    );
                    $defaultPreferences['emailaddress']['cssclass'] = $emailauthenticationclass;
                }
            }
 
            if ( $wgEnableUserEmail && $user->isAllowed( 'sendemail' ) ) {
                $defaultPreferences['disablemail'] = array(
                    'type' => 'toggle',
                    'invert' => true,
                    'section' => 'personal/email',
                    'label-message' => 'allowemail',
                    'disabled' => $disableEmailPrefs,
                );
                $defaultPreferences['ccmeonemails'] = array(
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-ccmeonemails',
                    'disabled' => $disableEmailPrefs,
                );
            }
 
            if ( $wgEnotifWatchlist ) {
                $defaultPreferences['enotifwatchlistpages'] = array(
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifwatchlistpages',
                    'disabled' => $disableEmailPrefs,
                );
            }
            if ( $wgEnotifUserTalk ) {
                $defaultPreferences['enotifusertalkpages'] = array(
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifusertalkpages',
                    'disabled' => $disableEmailPrefs,
                );
            }
            if ( $wgEnotifUserTalk || $wgEnotifWatchlist ) {
                $defaultPreferences['enotifminoredits'] = array(
                    'type' => 'toggle',
                    'section' => 'personal/email',
                    'label-message' => 'tog-enotifminoredits',
                    'disabled' => $disableEmailPrefs,
                );
 
                if ( $wgEnotifRevealEditorAddress ) {
                    $defaultPreferences['enotifrevealaddr'] = array(
                        'type' => 'toggle',
                        'section' => 'personal/email',
                        'label-message' => 'tog-enotifrevealaddr',
                        'disabled' => $disableEmailPrefs,
                    );
                }
            }
        }
    }
 
    static function skinPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        ## Skin #####################################
        global $wgAllowUserCss, $wgAllowUserJs;
 
        $defaultPreferences['skin'] = array(
            'type' => 'radio',
            'options' => self::generateSkinOptions( $user, $context ),
            'label' => '&#160;',
            'section' => 'rendering/skin',
        );
 
        # Create links to user CSS/JS pages for all skins
        # This code is basically copied from generateSkinOptions().  It'd
        # be nice to somehow merge this back in there to avoid redundancy.
        if ( $wgAllowUserCss || $wgAllowUserJs ) {
            $linkTools = array();
            $userName = $user->getName();
 
            if ( $wgAllowUserCss ) {
                $cssPage = Title::makeTitleSafe( NS_USER, $userName . '/common.css' );
                $linkTools[] = Linker::link( $cssPage, $context->msg( 'prefs-custom-css' )->escaped() );
            }
 
            if ( $wgAllowUserJs ) {
                $jsPage = Title::makeTitleSafe( NS_USER, $userName . '/common.js' );
                $linkTools[] = Linker::link( $jsPage, $context->msg( 'prefs-custom-js' )->escaped() );
            }
 
            $defaultPreferences['commoncssjs'] = array(
                'type' => 'info',
                'raw' => true,
                'default' => $context->getLanguage()->pipeList( $linkTools ),
                'label-message' => 'prefs-common-css-js',
                'section' => 'rendering/skin',
            );
        }
    }
 
    static function filesPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        ## Files #####################################
        $defaultPreferences['imagesize'] = array(
            'type' => 'select',
            'options' => self::getImageSizes( $context ),
            'label-message' => 'imagemaxsize',
            'section' => 'rendering/files',
        );
        $defaultPreferences['thumbsize'] = array(
            'type' => 'select',
            'options' => self::getThumbSizes( $context ),
            'label-message' => 'thumbsize',
            'section' => 'rendering/files',
        );
    }
 
    static function datetimePreferences( $user, IContextSource $context, &$defaultPreferences ) {
        ## Date and time #####################################
        $dateOptions = self::getDateOptions( $context );
        if ( $dateOptions ) {
            $defaultPreferences['date'] = array(
                'type' => 'radio',
                'options' => $dateOptions,
                'label' => '&#160;',
                'section' => 'rendering/dateformat',
            );
        }
 
        // Info
        $now = wfTimestampNow();
        $lang = $context->getLanguage();
        $nowlocal = Xml::element( 'span', array( 'id' => 'wpLocalTime' ),
            $lang->time( $now, true ) );
        $nowserver = $lang->time( $now, false ) .
            Html::hidden( 'wpServerTime', (int)substr( $now, 8, 2 ) * 60 + (int)substr( $now, 10, 2 ) );
 
        $defaultPreferences['nowserver'] = array(
            'type' => 'info',
            'raw' => 1,
            'label-message' => 'servertime',
            'default' => $nowserver,
            'section' => 'rendering/timeoffset',
        );
 
        $defaultPreferences['nowlocal'] = array(
            'type' => 'info',
            'raw' => 1,
            'label-message' => 'localtime',
            'default' => $nowlocal,
            'section' => 'rendering/timeoffset',
        );
 
        // Grab existing pref.
        $tzOffset = $user->getOption( 'timecorrection' );
        $tz = explode( '|', $tzOffset, 3 );
 
        $tzOptions = self::getTimezoneOptions( $context );
 
        $tzSetting = $tzOffset;
        if ( count( $tz ) > 1 && $tz[0] == 'Offset' ) {
            $minDiff = $tz[1];
            $tzSetting = sprintf( '%+03d:%02d', floor( $minDiff / 60 ), abs( $minDiff ) % 60 );
        } elseif ( count( $tz ) > 1 && $tz[0] == 'ZoneInfo' &&
            !in_array( $tzOffset, HTMLFormField::flattenOptions( $tzOptions ) )
        ) {
            # Timezone offset can vary with DST
            $userTZ = timezone_open( $tz[2] );
            if ( $userTZ !== false ) {
                $minDiff = floor( timezone_offset_get( $userTZ, date_create( 'now' ) ) / 60 );
                $tzSetting = "ZoneInfo|$minDiff|{$tz[2]}";
            }
        }
 
        $defaultPreferences['timecorrection'] = array(
            'class' => 'HTMLSelectOrOtherField',
            'label-message' => 'timezonelegend',
            'options' => $tzOptions,
            'default' => $tzSetting,
            'size' => 20,
            'section' => 'rendering/timeoffset',
        );
    }
 
    static function renderingPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        ## Diffs ####################################
        $defaultPreferences['diffonly'] = array(
            'type' => 'toggle',
            'section' => 'rendering/diffs',
            'label-message' => 'tog-diffonly',
        );
        $defaultPreferences['norollbackdiff'] = array(
            'type' => 'toggle',
            'section' => 'rendering/diffs',
            'label-message' => 'tog-norollbackdiff',
        );
 
        ## Page Rendering ##############################
        global $wgAllowUserCssPrefs;
        if ( $wgAllowUserCssPrefs ) {
            $defaultPreferences['underline'] = array(
                'type' => 'select',
                'options' => array(
                    $context->msg( 'underline-never' )->text() => 0,
                    $context->msg( 'underline-always' )->text() => 1,
                    $context->msg( 'underline-default' )->text() => 2,
                ),
                'label-message' => 'tog-underline',
                'section' => 'rendering/advancedrendering',
            );
        }
 
        $stubThresholdValues = array( 50, 100, 500, 1000, 2000, 5000, 10000 );
        $stubThresholdOptions = array( $context->msg( 'stub-threshold-disabled' )->text() => 0 );
        foreach ( $stubThresholdValues as $value ) {
            $stubThresholdOptions[$context->msg( 'size-bytes', $value )->text()] = $value;
        }
 
        $defaultPreferences['stubthreshold'] = array(
            'type' => 'select',
            'section' => 'rendering/advancedrendering',
            'options' => $stubThresholdOptions,
            'label-raw' => $context->msg( 'stub-threshold' )->text(), // Raw HTML message. Yay?
        );
 
        $defaultPreferences['showhiddencats'] = array(
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-showhiddencats'
        );
 
        $defaultPreferences['numberheadings'] = array(
            'type' => 'toggle',
            'section' => 'rendering/advancedrendering',
            'label-message' => 'tog-numberheadings',
        );
    }
 
    static function editingPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        global $wgAllowUserCssPrefs;
 
        ## Editing #####################################
        $defaultPreferences['editsectiononrightclick'] = array(
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editsectiononrightclick',
        );
        $defaultPreferences['editondblclick'] = array(
            'type' => 'toggle',
            'section' => 'editing/advancedediting',
            'label-message' => 'tog-editondblclick',
        );
 
        if ( $wgAllowUserCssPrefs ) {
            $defaultPreferences['editfont'] = array(
                'type' => 'select',
                'section' => 'editing/editor',
                'label-message' => 'editfont-style',
                'options' => array(
                    $context->msg( 'editfont-default' )->text() => 'default',
                    $context->msg( 'editfont-monospace' )->text() => 'monospace',
                    $context->msg( 'editfont-sansserif' )->text() => 'sans-serif',
                    $context->msg( 'editfont-serif' )->text() => 'serif',
                )
            );
        }
        $defaultPreferences['cols'] = array(
            'type' => 'int',
            'label-message' => 'columns',
            'section' => 'editing/editor',
            'min' => 4,
            'max' => 1000,
        );
        $defaultPreferences['rows'] = array(
            'type' => 'int',
            'label-message' => 'rows',
            'section' => 'editing/editor',
            'min' => 4,
            'max' => 1000,
        );
        if ( $user->isAllowed( 'minoredit' ) ) {
            $defaultPreferences['minordefault'] = array(
                'type' => 'toggle',
                'section' => 'editing/editor',
                'label-message' => 'tog-minordefault',
            );
        }
        $defaultPreferences['forceeditsummary'] = array(
            'type' => 'toggle',
            'section' => 'editing/editor',
            'label-message' => 'tog-forceeditsummary',
        );
        $defaultPreferences['useeditwarning'] = array(
            'type' => 'toggle',
            'section' => 'editing/editor',
            'label-message' => 'tog-useeditwarning',
        );
        $defaultPreferences['showtoolbar'] = array(
            'type' => 'toggle',
            'section' => 'editing/editor',
            'label-message' => 'tog-showtoolbar',
        );
 
        $defaultPreferences['previewonfirst'] = array(
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-previewonfirst',
        );
        $defaultPreferences['previewontop'] = array(
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-previewontop',
        );
        $defaultPreferences['uselivepreview'] = array(
            'type' => 'toggle',
            'section' => 'editing/preview',
            'label-message' => 'tog-uselivepreview',
        );
 
    }
 
    static function rcPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        global $wgRCMaxAge, $wgRCShowWatchingUsers;
 
        ## RecentChanges #####################################
        $defaultPreferences['rcdays'] = array(
            'type' => 'float',
            'label-message' => 'recentchangesdays',
            'section' => 'rc/displayrc',
            'min' => 1,
            'max' => ceil( $wgRCMaxAge / ( 3600 * 24 ) ),
            'help' => $context->msg( 'recentchangesdays-max' )->numParams(
                ceil( $wgRCMaxAge / ( 3600 * 24 ) ) )->text()
        );
        $defaultPreferences['rclimit'] = array(
            'type' => 'int',
            'label-message' => 'recentchangescount',
            'help-message' => 'prefs-help-recentchangescount',
            'section' => 'rc/displayrc',
        );
        $defaultPreferences['usenewrc'] = array(
            'type' => 'toggle',
            'label-message' => 'tog-usenewrc',
            'section' => 'rc/advancedrc',
        );
        $defaultPreferences['hideminor'] = array(
            'type' => 'toggle',
            'label-message' => 'tog-hideminor',
            'section' => 'rc/advancedrc',
        );
 
        if ( $user->useRCPatrol() ) {
            $defaultPreferences['hidepatrolled'] = array(
                'type' => 'toggle',
                'section' => 'rc/advancedrc',
                'label-message' => 'tog-hidepatrolled',
            );
            $defaultPreferences['newpageshidepatrolled'] = array(
                'type' => 'toggle',
                'section' => 'rc/advancedrc',
                'label-message' => 'tog-newpageshidepatrolled',
            );
        }
 
        if ( $wgRCShowWatchingUsers ) {
            $defaultPreferences['shownumberswatching'] = array(
                'type' => 'toggle',
                'section' => 'rc/advancedrc',
                'label-message' => 'tog-shownumberswatching',
            );
        }
    }
 
    static function watchlistPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        global $wgUseRCPatrol, $wgEnableAPI, $wgRCMaxAge;
 
        $watchlistdaysMax = ceil( $wgRCMaxAge / ( 3600 * 24 ) );
 
        ## Watchlist #####################################
        $defaultPreferences['watchlistdays'] = array(
            'type' => 'float',
            'min' => 0,
            'max' => $watchlistdaysMax,
            'section' => 'watchlist/displaywatchlist',
            'help' => $context->msg( 'prefs-watchlist-days-max' )->numParams(
                $watchlistdaysMax )->text(),
            'label-message' => 'prefs-watchlist-days',
        );
        $defaultPreferences['wllimit'] = array(
            'type' => 'int',
            'min' => 0,
            'max' => 1000,
            'label-message' => 'prefs-watchlist-edits',
            'help' => $context->msg( 'prefs-watchlist-edits-max' )->escaped(),
            'section' => 'watchlist/displaywatchlist',
        );
        $defaultPreferences['extendwatchlist'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-extendwatchlist',
        );
        $defaultPreferences['watchlisthideminor'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlisthideminor',
        );
        $defaultPreferences['watchlisthidebots'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlisthidebots',
        );
        $defaultPreferences['watchlisthideown'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlisthideown',
        );
        $defaultPreferences['watchlisthideanons'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlisthideanons',
        );
        $defaultPreferences['watchlisthideliu'] = array(
            'type' => 'toggle',
            'section' => 'watchlist/advancedwatchlist',
            'label-message' => 'tog-watchlisthideliu',
        );
 
        if ( $wgUseRCPatrol ) {
            $defaultPreferences['watchlisthidepatrolled'] = array(
                'type' => 'toggle',
                'section' => 'watchlist/advancedwatchlist',
                'label-message' => 'tog-watchlisthidepatrolled',
            );
        }
 
        $watchTypes = array(
            'edit' => 'watchdefault',
            'move' => 'watchmoves',
            'delete' => 'watchdeletion'
        );
 
        // Kinda hacky
        if ( $user->isAllowed( 'createpage' ) || $user->isAllowed( 'createtalk' ) ) {
            $watchTypes['read'] = 'watchcreations';
        }
 
        foreach ( $watchTypes as $action => $pref ) {
            if ( $user->isAllowed( $action ) ) {
                // Messages:
                // tog-watchdefault, tog-watchmoves, tog-watchdeletion, tog-watchcreations
                $defaultPreferences[$pref] = array(
                    'type' => 'toggle',
                    'section' => 'watchlist/advancedwatchlist',
                    'label-message' => "tog-$pref",
                );
            }
        }
 
        if ( $wgEnableAPI ) {
            $defaultPreferences['watchlisttoken'] = array(
                'type' => 'api',
            );
            $defaultPreferences['watchlisttoken-info'] = array(
                'type' => 'info',
                'section' => 'watchlist/tokenwatchlist',
                'label-message' => 'prefs-watchlist-token',
                'default' => $user->getTokenFromOption( 'watchlisttoken' ),
                'help-message' => 'prefs-help-watchlist-token2',
            );
        }
    }
 
    static function searchPreferences( $user, IContextSource $context, &$defaultPreferences ) {
        global $wgContLang;
 
        $defaultPreferences['searcheverything'] = array(
            'type' => 'toggle',
            'label-message' => 'searcheverything-enable',
            'section' => 'searchoptions/advancedsearchoptions',
        );
 
        $nsOptions = $wgContLang->getFormattedNamespaces();
        $nsOptions[0] = $context->msg( 'blanknamespace' )->text();
        foreach ( $nsOptions as $ns => $name ) {
            if ( $ns < 0 ) {
                unset( $nsOptions[$ns] );
            }
        }
 
        $defaultPreferences['searchnamespaces'] = array(
            'type' => 'multiselect',
            'label-message' => 'defaultns',
            'options' => array_flip( $nsOptions ),
            'section' => 'searchoptions/advancedsearchoptions',
            'prefix' => 'searchNs',
        );
    }
 
    static function miscPreferences( $user, IContextSource $context, &$defaultPreferences ) {
    }
 
    static function generateSkinOptions( $user, IContextSource $context ) {
        global $wgDefaultSkin, $wgAllowUserCss, $wgAllowUserJs;
        $ret = array();
 
        $mptitle = Title::newMainPage();
        $previewtext = $context->msg( 'skin-preview' )->text();
 
        # Only show skins that aren't disabled in $wgSkipSkins
        $validSkinNames = Skin::getAllowedSkins();
 
        # Sort by UI skin name. First though need to update validSkinNames as sometimes
        # the skinkey & UI skinname differ (e.g. "standard" skinkey is "Classic" in the UI).
        foreach ( $validSkinNames as $skinkey => &$skinname ) {
            $msg = $context->msg( "skinname-{$skinkey}" );
            if ( $msg->exists() ) {
                $skinname = htmlspecialchars( $msg->text() );
            }
        }
        asort( $validSkinNames );
 
        foreach ( $validSkinNames as $skinkey => $sn ) {
            $linkTools = array();
 
            # Mark the default skin
            if ( $skinkey == $wgDefaultSkin ) {
                $linkTools[] = $context->msg( 'default' )->escaped();
            }
 
            # Create preview link
            $mplink = htmlspecialchars( $mptitle->getLocalURL( array( 'useskin' => $skinkey ) ) );
            $linkTools[] = "<a target='_blank' href=\"$mplink\">$previewtext</a>";
 
            # Create links to user CSS/JS pages
            if ( $wgAllowUserCss ) {
                $cssPage = Title::makeTitleSafe( NS_USER, $user->getName() . '/' . $skinkey . '.css' );
                $linkTools[] = Linker::link( $cssPage, $context->msg( 'prefs-custom-css' )->escaped() );
            }
 
            if ( $wgAllowUserJs ) {
                $jsPage = Title::makeTitleSafe( NS_USER, $user->getName() . '/' . $skinkey . '.js' );
                $linkTools[] = Linker::link( $jsPage, $context->msg( 'prefs-custom-js' )->escaped() );
            }
 
            $display = $sn . ' ' . $context->msg(
                'parentheses',
                $context->getLanguage()->pipeList( $linkTools )
            )->text();
            $ret[$display] = $skinkey;
        }
 
        return $ret;
    }
 
    static function getDateOptions( IContextSource $context ) {
        $lang = $context->getLanguage();
        $dateopts = $lang->getDatePreferences();
 
        $ret = array();
 
        if ( $dateopts ) {
            if ( !in_array( 'default', $dateopts ) ) {
                $dateopts[] = 'default'; // Make sure default is always valid
                                        // Bug 19237
            }
 
            // KLUGE: site default might not be valid for user language
            global $wgDefaultUserOptions;
            if ( !in_array( $wgDefaultUserOptions['date'], $dateopts ) ) {
                $wgDefaultUserOptions['date'] = 'default';
            }
 
            $epoch = wfTimestampNow();
            foreach ( $dateopts as $key ) {
                if ( $key == 'default' ) {
                    $formatted = $context->msg( 'datedefault' )->escaped();
                } else {
                    $formatted = htmlspecialchars( $lang->timeanddate( $epoch, false, $key ) );
                }
                $ret[$formatted] = $key;
            }
        }
        return $ret;
    }
 
    static function getImageSizes( IContextSource $context ) {
        global $wgImageLimits;
 
        $ret = array();
        $pixels = $context->msg( 'unit-pixel' )->text();
 
        foreach ( $wgImageLimits as $index => $limits ) {
            $display = "{$limits[0]}×{$limits[1]}" . $pixels;
            $ret[$display] = $index;
        }
 
        return $ret;
    }
 
    static function getThumbSizes( IContextSource $context ) {
        global $wgThumbLimits;
 
        $ret = array();
        $pixels = $context->msg( 'unit-pixel' )->text();
 
        foreach ( $wgThumbLimits as $index => $size ) {
            $display = $size . $pixels;
            $ret[$display] = $index;
        }
 
        return $ret;
    }
 
    static function validateSignature( $signature, $alldata, $form ) {
        global $wgParser, $wgMaxSigChars;
        if ( mb_strlen( $signature ) > $wgMaxSigChars ) {
            return Xml::element( 'span', array( 'class' => 'error' ),
                $form->msg( 'badsiglength' )->numParams( $wgMaxSigChars )->text() );
        } elseif ( isset( $alldata['fancysig'] ) &&
                $alldata['fancysig'] &&
                $wgParser->validateSig( $signature ) === false
        ) {
            return Xml::element(
                'span',
                array( 'class' => 'error' ),
                $form->msg( 'badsig' )->text()
            );
        } else {
            return true;
        }
    }
 
    static function cleanSignature( $signature, $alldata, $form ) {
        if ( isset( $alldata['fancysig'] ) && $alldata['fancysig'] ) {
            global $wgParser;
            $signature = $wgParser->cleanSig( $signature );
        } else {
            // When no fancy sig used, make sure ~{3,5} get removed.
            $signature = Parser::cleanSigInSig( $signature );
        }
 
        return $signature;
    }
 
    static function getFormObject(
        $user,
        IContextSource $context,
        $formClass = 'PreferencesForm',
        array $remove = array()
    ) {
        $formDescriptor = Preferences::getPreferences( $user, $context );
        if ( count( $remove ) ) {
            $removeKeys = array_flip( $remove );
            $formDescriptor = array_diff_key( $formDescriptor, $removeKeys );
        }
 
        // Remove type=api preferences. They are not intended for rendering in the form.
        foreach ( $formDescriptor as $name => $info ) {
            if ( isset( $info['type'] ) && $info['type'] === 'api' ) {
                unset( $formDescriptor[$name] );
            }
        }
 
        $htmlForm = new $formClass( $formDescriptor, $context, 'prefs' );
 
        $htmlForm->setModifiedUser( $user );
        $htmlForm->setId( 'mw-prefs-form' );
        $htmlForm->setSubmitText( $context->msg( 'saveprefs' )->text() );
        # Used message keys: 'accesskey-preferences-save', 'tooltip-preferences-save'
        $htmlForm->setSubmitTooltip( 'preferences-save' );
        $htmlForm->setSubmitID( 'prefsubmit' );
        $htmlForm->setSubmitCallback( array( 'Preferences', 'tryFormSubmit' ) );
 
        return $htmlForm;
    }
 
    static function getTimezoneOptions( IContextSource $context ) {
        $opt = array();
 
        global $wgLocalTZoffset;
        $timestamp = MWTimestamp::getLocalInstance();
        // Check that $wgLocalTZoffset is the same as the local time zone offset
        if ( $wgLocalTZoffset == $timestamp->format( 'Z' ) / 60 ) {
            $server_tz_msg = $context->msg(
                'timezoneuseserverdefault',
                $timestamp->getTimezone()->getName()
            )->text();
        } else {
            $tzstring = sprintf(
                '%+03d:%02d',
                floor( $wgLocalTZoffset / 60 ),
                abs( $wgLocalTZoffset ) % 60
            );
            $server_tz_msg = $context->msg( 'timezoneuseserverdefault', $tzstring )->text();
        }
        $opt[$server_tz_msg] = "System|$wgLocalTZoffset";
        $opt[$context->msg( 'timezoneuseoffset' )->text()] = 'other';
        $opt[$context->msg( 'guesstimezone' )->text()] = 'guess';
 
        if ( function_exists( 'timezone_identifiers_list' ) ) {
            # Read timezone list
            $tzs = timezone_identifiers_list();
            sort( $tzs );
 
            $tzRegions = array();
            $tzRegions['Africa'] = $context->msg( 'timezoneregion-africa' )->text();
            $tzRegions['America'] = $context->msg( 'timezoneregion-america' )->text();
            $tzRegions['Antarctica'] = $context->msg( 'timezoneregion-antarctica' )->text();
            $tzRegions['Arctic'] = $context->msg( 'timezoneregion-arctic' )->text();
            $tzRegions['Asia'] = $context->msg( 'timezoneregion-asia' )->text();
            $tzRegions['Atlantic'] = $context->msg( 'timezoneregion-atlantic' )->text();
            $tzRegions['Australia'] = $context->msg( 'timezoneregion-australia' )->text();
            $tzRegions['Europe'] = $context->msg( 'timezoneregion-europe' )->text();
            $tzRegions['Indian'] = $context->msg( 'timezoneregion-indian' )->text();
            $tzRegions['Pacific'] = $context->msg( 'timezoneregion-pacific' )->text();
            asort( $tzRegions );
 
            $prefill = array_fill_keys( array_values( $tzRegions ), array() );
            $opt = array_merge( $opt, $prefill );
 
            $now = date_create( 'now' );
 
            foreach ( $tzs as $tz ) {
                $z = explode( '/', $tz, 2 );
 
                # timezone_identifiers_list() returns a number of
                # backwards-compatibility entries. This filters them out of the
                # list presented to the user.
                if ( count( $z ) != 2 || !array_key_exists( $z[0], $tzRegions ) ) {
                    continue;
                }
 
                # Localize region
                $z[0] = $tzRegions[$z[0]];
 
                $minDiff = floor( timezone_offset_get( timezone_open( $tz ), $now ) / 60 );
 
                $display = str_replace( '_', ' ', $z[0] . '/' . $z[1] );
                $value = "ZoneInfo|$minDiff|$tz";
 
                $opt[$z[0]][$display] = $value;
            }
        }
        return $opt;
    }
 
    static function filterIntval( $value, $alldata ) {
        return intval( $value );
    }
 
    static function filterTimezoneInput( $tz, $alldata ) {
        $data = explode( '|', $tz, 3 );
        switch ( $data[0] ) {
            case 'ZoneInfo':
            case 'System':
                return $tz;
            default:
                $data = explode( ':', $tz, 2 );
                if ( count( $data ) == 2 ) {
                    $data[0] = intval( $data[0] );
                    $data[1] = intval( $data[1] );
                    $minDiff = abs( $data[0] ) * 60 + $data[1];
                    if ( $data[0] < 0 ) {
                        $minDiff = - $minDiff;
                    }
                } else {
                    $minDiff = intval( $data[0] ) * 60;
                }
 
                # Max is +14:00 and min is -12:00, see:
                # http://en.wikipedia.org/wiki/Timezone
                $minDiff = min( $minDiff, 840 );  # 14:00
                $minDiff = max( $minDiff, - 720 ); # -12:00
                return 'Offset|' . $minDiff;
        }
    }
 
    static function tryFormSubmit( $formData, $form ) {
        global $wgHiddenPrefs, $wgAuth;
 
        $user = $form->getModifiedUser();
        $result = true;
 
        if ( !$user->isAllowedAny( 'editmyprivateinfo', 'editmyoptions' ) ) {
            return Status::newFatal( 'mypreferencesprotected' );
        }
 
        // Filter input
        foreach ( array_keys( $formData ) as $name ) {
            if ( isset( self::$saveFilters[$name] ) ) {
                $formData[$name] =
                    call_user_func( self::$saveFilters[$name], $formData[$name], $formData );
            }
        }
 
        // Fortunately, the realname field is MUCH simpler
        // (not really "private", but still shouldn't be edited without permission)
        if ( !in_array( 'realname', $wgHiddenPrefs ) && $user->isAllowed( 'editmyprivateinfo' ) && array_key_exists( 'realname', $formData ) ) {
            $realName = $formData['realname'];
            $user->setRealName( $realName );
        }
 
        if ( $user->isAllowed( 'editmyoptions' ) ) {
            foreach ( self::$saveBlacklist as $b ) {
                unset( $formData[$b] );
            }
 
            # If users have saved a value for a preference which has subsequently been disabled
            # via $wgHiddenPrefs, we don't want to destroy that setting in case the preference
            # is subsequently re-enabled
            foreach ( $wgHiddenPrefs as $pref ) {
                # If the user has not set a non-default value here, the default will be returned
                # and subsequently discarded
                $formData[$pref] = $user->getOption( $pref, null, true );
            }
 
            // Keep old preferences from interfering due to back-compat code, etc.
            $user->resetOptions( 'unused', $form->getContext() );
 
            foreach ( $formData as $key => $value ) {
                $user->setOption( $key, $value );
            }
 
            wfRunHooks( 'PreferencesFormPreSave', array( $formData, $form, $user, &$result ) );
            $user->saveSettings();
        }
 
        $wgAuth->updateExternalDB( $user );
 
        return $result;
    }
 
    public static function tryUISubmit( $formData, $form ) {
        $res = self::tryFormSubmit( $formData, $form );
 
        if ( $res ) {
            $urlOptions = array( 'success' => 1 );
 
            if ( $res === 'eauth' ) {
                $urlOptions['eauth'] = 1;
            }
 
            $urlOptions += $form->getExtraSuccessRedirectParameters();
 
            $url = $form->getTitle()->getFullURL( $urlOptions );
 
            $form->getContext()->getOutput()->redirect( $url );
        }
 
        return Status::newGood();
    }
 
    public static function trySetUserEmail( User $user, $newaddr ) {
        wfDeprecated( __METHOD__, '1.20' );
 
        $result = $user->setEmailWithConfirmation( $newaddr );
        if ( $result->isGood() ) {
            return array( true, $result->value );
        } else {
            return array( $result, 'mailerror' );
        }
    }
 
    public static function loadOldSearchNs( $user ) {
        wfDeprecated( __METHOD__, '1.19' );
 
        $searchableNamespaces = SearchEngine::searchableNamespaces();
        // Back compat with old format
        $arr = array();
 
        foreach ( $searchableNamespaces as $ns => $name ) {
            if ( $user->getOption( 'searchNs' . $ns ) ) {
                $arr[] = $ns;
            }
        }
 
        return $arr;
    }
}
 
class PreferencesForm extends HTMLForm {
    // Override default value from HTMLForm
    protected $mSubSectionBeforeFields = false;
 
    private $modifiedUser;
 
    public function setModifiedUser( $user ) {
        $this->modifiedUser = $user;
    }
 
    public function getModifiedUser() {
        if ( $this->modifiedUser === null ) {
            return $this->getUser();
        } else {
            return $this->modifiedUser;
        }
    }
 
    public function getExtraSuccessRedirectParameters() {
        return array();
    }
 
    function wrapForm( $html ) {
        $html = Xml::tags( 'div', array( 'id' => 'preferences' ), $html );
 
        return parent::wrapForm( $html );
    }
 
    function getButtons() {
        if ( !$this->getModifiedUser()->isAllowedAny( 'editmyprivateinfo', 'editmyoptions' ) ) {
            return '';
        }
 
        $html = parent::getButtons();
 
        if ( $this->getModifiedUser()->isAllowed( 'editmyoptions' ) ) {
            $t = SpecialPage::getTitleFor( 'Preferences', 'reset' );
 
            $html .= "\n" . Linker::link( $t, $this->msg( 'restoreprefs' )->escaped() );
 
            $html = Xml::tags( 'div', array( 'class' => 'mw-prefs-buttons' ), $html );
        }
 
        return $html;
    }
 
    function filterDataForSubmit( $data ) {
        foreach ( $this->mFlatFields as $fieldname => $field ) {
            if ( $field instanceof HTMLNestedFilterable ) {
                $info = $field->mParams;
                $prefix = isset( $info['prefix'] ) ? $info['prefix'] : $fieldname;
                foreach ( $field->filterDataForSubmit( $data[$fieldname] ) as $key => $value ) {
                    $data["$prefix$key"] = $value;
                }
                unset( $data[$fieldname] );
            }
        }
 
        return $data;
    }
 
    function getBody() {
        return $this->displaySection( $this->mFieldTree, '', 'mw-prefsection-' );
    }
 
    function getLegend( $key ) {
        $legend = parent::getLegend( $key );
        wfRunHooks( 'PreferencesGetLegend', array( $this, $key, &$legend ) );
        return $legend;
    }
}