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Refactor Linker class, add Target class.

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This commit is contained in:
Daniel Kraus
2017-08-27 22:18:22 +02:00
parent 5f7c96459d
commit 35b174771e
5 changed files with 328 additions and 200 deletions
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1
extension.json
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@ -35,6 +35,7 @@
"AutoloadClasses": { "AutoloadClasses": {
"LinkTitles\\Extension": "includes/Extension.php", "LinkTitles\\Extension": "includes/Extension.php",
"LinkTitles\\Linker": "includes/Linker.php", "LinkTitles\\Linker": "includes/Linker.php",
"LinkTitles\\Target": "includes/Target.php",
"LinkTitles\\Targets": "includes/Targets.php", "LinkTitles\\Targets": "includes/Targets.php",
"LinkTitles\\Delimiters": "includes/Delimiters.php", "LinkTitles\\Delimiters": "includes/Delimiters.php",
"LinkTitles\\Config": "includes/Config.php", "LinkTitles\\Config": "includes/Config.php",

20
includes/Config.php
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@ -133,6 +133,22 @@ class Config {
*/ */
public $parseHeadings; public $parseHeadings;
/**
* Whether to check if a potential target page links back to the source page.
* Set this to true to avoid indirect linkbacks.
*
* @var bool $checkRedirect
*/
public $checkRedirect;
/**
* Whether to enable the __NOAUTOLINKTARGET__ magic word which prevents
* a potential target page from being linked to.
*
* @var bool $enableNoTargetMagicWord
*/
public $enableNoTargetMagicWord;
public $enableConsoleOutput; public $enableConsoleOutput;
public $enableDebugConsoleOutput; public $enableDebugConsoleOutput;
@ -156,6 +172,8 @@ class Config {
global $wgLinkTitlesWordEndOnly; global $wgLinkTitlesWordEndOnly;
global $wgLinkTitlesSkipTemplates; global $wgLinkTitlesSkipTemplates;
global $wgLinkTitlesParseHeadings; global $wgLinkTitlesParseHeadings;
global $wgLinkTitlesEnableNoTargetMagicWord;
global $wgLinkTitlesCheckRedirect;
$this->parseOnEdit = $wgLinkTitlesParseOnEdit; $this->parseOnEdit = $wgLinkTitlesParseOnEdit;
$this->parseOnRender = $wgLinkTitlesParseOnRender; $this->parseOnRender = $wgLinkTitlesParseOnRender;
$this->preferShortTitles = $wgLinkTitlesPreferShortTitles; $this->preferShortTitles = $wgLinkTitlesPreferShortTitles;
@ -169,6 +187,8 @@ class Config {
$this->wordEndOnly = $wgLinkTitlesWordEndOnly; $this->wordEndOnly = $wgLinkTitlesWordEndOnly;
$this->skipTemplates = $wgLinkTitlesSkipTemplates; $this->skipTemplates = $wgLinkTitlesSkipTemplates;
$this->parseHeadings = $wgLinkTitlesParseHeadings; $this->parseHeadings = $wgLinkTitlesParseHeadings;
$this->enableNoTargetMagicWord = $wgLinkTitlesEnableNoTargetMagicWord;;
$this->checkRedirect = $wgLinkTitlesCheckRedirect;;
$this->enableConsoleOutput = false; $this->enableConsoleOutput = false;
$this->enableDebugConsoleOutput = false; $this->enableDebugConsoleOutput = false;
} }

62
includes/Delimiters.php
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@ -27,15 +27,36 @@ namespace LinkTitles;
* Caches a regular expression that delimits text to be parsed. * Caches a regular expression that delimits text to be parsed.
*/ */
class Delimiters { class Delimiters {
/**
* The splitting expression that separates text to be parsed from text that
* must not be parsed.
* @var String $splitter
*/
public $splitter;
/**
* The LinkTitles configuration for this Delimiters instance.
* @var Config $config
*/
public $config;
private static $instance; private static $instance;
/** /**
* Singleton factory. * Gets the Delimiters singleton; may build one with the given config or the
* default config if none is given.
* *
* @param Config $config LinkTitles configuration. * If the instance was already created, it does not matter what Config this
* method is called with. To re-create an instance with a different Config,
* call Delimiters::invalidate() first.
*
* @param Config|null $config LinkTitles configuration.
*/ */
public static function default( Config $config ) { public static function default( Config &$config = null ) {
if ( self::$instance === null ) { if ( self::$instance === null ) {
if ( $config === null ) {
$config = new Config();
}
self::$instance = new Delimiters( $config ); self::$instance = new Delimiters( $config );
} }
return self::$instance; return self::$instance;
@ -56,27 +77,15 @@ class Delimiters {
} }
/** /**
* The splitting expression that separates text to be parsed from text that * Splits a text into sections that may be linked and sections that may not
* must not be parsed. * be linked (e.g., because they already are a link, or a template, etc.).
* @var String $splitter *
* @param String &$text Text to split.
* @return Array of strings where even indexes point to linkable sections.
*/ */
public $splitter; public function split( &$text ) {
return preg_split( $this->splitter, $text, -1, PREG_SPLIT_DELIM_CAPTURE );
/** }
* Regex that matches the start of a word; this expression depends on the
* setting of LinkTitles\Config->wordStartOnly;
* @var String $wordStart
*/
public $wordStart;
/**
* Regex that matches the end of a word; this expression depends on the
* setting of LinkTitles\Config->wordEndOnly;
* @var String $wordEnd
*/
public $wordEnd;
private $config;
/* /*
* Builds the delimiter that is used in a regexp to separate * Builds the delimiter that is used in a regexp to separate
@ -84,13 +93,6 @@ class Delimiters {
* parsed (e.g. inside existing links etc.) * parsed (e.g. inside existing links etc.)
*/ */
private function buildDelimiters() { private function buildDelimiters() {
// Use unicode character properties rather than \b escape sequences
// to detect whole words containing non-ASCII characters as well.
// Note that this requires a PCRE library that was compiled with
// --enable-unicode-properties
( $this->config->wordStartOnly ) ? $this->wordStart = '(?<!\pL)' : $this->wordStart = '';
( $this->config->wordEndOnly ) ? $this->wordEnd = '(?!\pL)' : $this->wordEnd = '';
if ( $this->config->skipTemplates ) if ( $this->config->skipTemplates )
{ {
// Use recursive regex to balance curly braces; // Use recursive regex to balance curly braces;

217
includes/Linker.php
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@ -27,24 +27,6 @@ namespace LinkTitles;
* Performs the actual linking of content to existing pages. * Performs the actual linking of content to existing pages.
*/ */
class Linker { class Linker {
/// A Title object for the page that is being parsed.
private $currentTitle;
/// A Title object for the target page currently being examined.
private $targetTitle;
// The TitleValue object of the target page
private $targetTitleValue;
/// The content object for the currently processed target page.
/// This variable is necessary to be able to prevent loading the target
/// content twice.
private $targetContent;
/// Holds the page title of the currently processed target page
/// as a string.
private $targetTitleText;
/** /**
* LinkTitles configuration. * LinkTitles configuration.
* *
@ -52,6 +34,17 @@ class Linker {
*/ */
public $config; public $config;
/**
* The string representation of the title object for the potential target page
* that is currently being processed.
*
* This is an instance variable (rather than a local method variable) so it
* can be accessed in the preg_replace_callback callbacks.
*
* @var String $targetTitleString
*/
private $targetTitleText;
/** /**
* Constructs a new instance of the Linker class. * Constructs a new instance of the Linker class.
* *
@ -61,58 +54,50 @@ class Linker {
$this->config = $config; $this->config = $config;
} }
/* /**
* Core function of the extension, performs the actual parsing of the content. * Core function of the extension, performs the actual parsing of the content.
* *
* @param Parser $parser Parser instance for the current page * This method receives a Title object and the string representation of the
* source page. It does not work on a WikiPage object directly because the
* callbacks in the Extension class do not always get a WikiPage object in the
* first place.
*
* @param \Title &$title Title object for the current page.
* @param String $text String that holds the article content * @param String $text String that holds the article content
* @returns String String with links to target pages * @return String with links to target pages
*/ */
public function linkContent( \Title &$title, &$text ) { public function linkContent( \Title &$title, &$text ) {
( $this->config->firstOnly ) ? $limit = 1 : $limit = -1; ( $this->config->firstOnly ) ? $limit = 1 : $limit = -1;
$limitReached = false; $limitReached = false;
$this->currentTitle = $title;
$newText = $text; $newText = $text;
$delimiters = Delimiters::default( $this->config ); $delimiters = Delimiters::default( $this->config );
$targets = Targets::default( $title, $this->config ); $targets = Targets::default( $title, $this->config );
// Iterate through the page titles // Iterate through the target page titles
foreach( $targets->queryResult as $row ) { foreach( $targets->queryResult as $row ) {
$this->newTarget( $row->page_namespace, $row->page_title ); $target = new Target( $row->page_namespace, $row->page_title, $this->config );
// Don't link current page // Don't link current page and don't link if the target page redirects
if ( $this->targetTitle->equals( $this->currentTitle ) ) { continue; } // to the current page or has the __NOAUTOLINKTARGET__ magic word
// (as required by the actual LinkTitles configuration).
// split the page content by [[...]] groups if ( $target->isSameTitle( $title ) || !$target->mayLinkTo( $title ) ) {
// credits to inhan @ StackOverflow for suggesting preg_split continue;
// see http://stackoverflow.com/questions/10672286
$arr = preg_split( $delimiters->splitter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE );
// Escape certain special characters in the page title to prevent
// regexp compilation errors
$this->targetTitleText = $this->targetTitle->getText();
$quotedTitle = preg_quote( $this->targetTitleText, '/' );
$this->ltDebugLog( 'TargetTitle='. $this->targetTitleText, 'private' );
$this->ltDebugLog( 'TargetTitleQuoted='. $quotedTitle, 'private' );
// Depending on the global configuration setting $wgCapitalLinks,
// the title has to be searched for either in a strictly case-sensitive
// way, or in a 'fuzzy' way where the first letter of the title may
// be either case.
if ( $this->config->capitalLinks && ( $quotedTitle[0] != '\\' )) {
$searchTerm = '((?i)' . $quotedTitle[0] . '(?-i)' .
substr($quotedTitle, 1) . ')';
} else {
$searchTerm = '(' . $quotedTitle . ')';
} }
$regex = '/(?<![\:\.\@\/\?\&])' . $delimiters->wordStart . $searchTerm . $delimiters->wordEnd . '/S'; // Split the page content by non-linkable sections.
// Credits to inhan @ StackOverflow for suggesting preg_split.
// See http://stackoverflow.com/questions/10672286
$arr = $delimiters->split( $newText );
$count = 0;
// Cache the target title text for the regex callbacks
$this->targetTitleText = $target->getTitleText();
// Even indexes will point to sections of the text that may be linked
for ( $i = 0; $i < count( $arr ); $i += 2 ) { for ( $i = 0; $i < count( $arr ); $i += 2 ) {
// even indexes will point to text that is not enclosed by brackets $arr[$i] = preg_replace_callback( $target->getCaseSensitiveRegex(),
$arr[$i] = preg_replace_callback( $regex,
array( $this, 'simpleModeCallback'), array( $this, 'simpleModeCallback'),
$arr[$i], $limit, $count ); $arr[$i], $limit, $count );
if ( $this->config->firstOnly && ( $count > 0 ) ) { if ( $this->config->firstOnly && ( $count > 0 ) ) {
@ -126,13 +111,14 @@ class Linker {
// pass on the page and add links with aliases where the case does // pass on the page and add links with aliases where the case does
// not match. // not match.
if ( $this->config->smartMode && !$limitReached ) { if ( $this->config->smartMode && !$limitReached ) {
$arr = preg_split( $delimiters->splitter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE ); if ( $count > 0 ) {
// Split the text again because it was changed in the first pass.
$arr = $delimiters->split( $newText );
}
for ( $i = 0; $i < count( $arr ); $i+=2 ) { for ( $i = 0; $i < count( $arr ); $i+=2 ) {
// even indexes will point to text that is not enclosed by brackets // even indexes will point to text that is not enclosed by brackets
$arr[$i] = preg_replace_callback( '/(?<![\:\.\@\/\?\&])' . $arr[$i] = preg_replace_callback( $target->getCaseInsensitiveRegex(),
$delimiters->wordStart . '(' . $quotedTitle . ')' .
$delimiters->wordEnd . '/iS',
array( $this, 'smartModeCallback'), array( $this, 'smartModeCallback'),
$arr[$i], $limit, $count ); $arr[$i], $limit, $count );
if ( $this->config->firstOnly && ( $count > 0 )) { if ( $this->config->firstOnly && ( $count > 0 )) {
@ -142,37 +128,38 @@ class Linker {
$newText = implode( '', $arr ); $newText = implode( '', $arr );
} // $wgLinkTitlesSmartMode } // $wgLinkTitlesSmartMode
}; // foreach $res as $row }; // foreach $res as $row
return $newText; return $newText;
} }
// Build an anonymous callback function to be used in simple mode. /**
* Callback for preg_replace_callback in simple mode.
*
* @param array $matches Matches provided by preg_replace_callback
* @return string Target page title with or without link markup
*/
private function simpleModeCallback( array $matches ) { private function simpleModeCallback( array $matches ) {
if ( $this->checkTargetPage() ) {
$this->ltLog( "Linking '$matches[0]' to '" . $this->targetTitle . "'" );
return '[[' . $matches[0] . ']]'; return '[[' . $matches[0] . ']]';
} }
else
{
return $matches[0];
}
}
// Callback function for use with preg_replace_callback. /**
// This essentially performs a case-sensitive comparison of the * Callback function for use with preg_replace_callback.
// current page title and the occurrence found on the page; if * This essentially performs a case-sensitive comparison of the
// the cases do not match, it builds an aliased (piped) link. * current page title and the occurrence found on the page; if
// If $wgCapitalLinks is set to true, the case of the first * the cases do not match, it builds an aliased (piped) link.
// letter is ignored by MediaWiki and we don't need to build a * If $wgCapitalLinks is set to true, the case of the first
// piped link if only the case of the first letter is different. * letter is ignored by MediaWiki and we don't need to build a
* piped link if only the case of the first letter is different.
*
* @param array $matches Matches provided by preg_replace_callback
* @return string Target page title with or without link markup
*/
private function smartModeCallback( array $matches ) { private function smartModeCallback( array $matches ) {
if ( $this->config->capitalLinks ) { if ( $this->config->capitalLinks ) {
// With $wgCapitalLinks set to true we have a slightly more // With $wgCapitalLinks set to true we have a slightly more
// complicated version of the callback than if it were false; // complicated version of the callback than if it were false;
// we need to ignore the first letter of the page titles, as // we need to ignore the first letter of the page titles, as
// it does not matter for linking. // it does not matter for linking.
if ( $this->checkTargetPage() ) {
$this->ltLog( "Linking (smart) '$matches[0]' to '" . $this->targetTitle . "'" );
if ( strcmp( substr( $this->targetTitleText, 1 ), substr( $matches[ 0 ], 1) ) == 0 ) { if ( strcmp( substr( $this->targetTitleText, 1 ), substr( $matches[ 0 ], 1) ) == 0 ) {
// Case-sensitive match: no need to bulid piped link. // Case-sensitive match: no need to bulid piped link.
return '[[' . $matches[ 0 ] . ']]'; return '[[' . $matches[ 0 ] . ']]';
@ -180,16 +167,9 @@ class Linker {
// Case-insensitive match: build piped link. // Case-insensitive match: build piped link.
return '[[' . $this->targetTitleText . '|' . $matches[ 0 ] . ']]'; return '[[' . $this->targetTitleText . '|' . $matches[ 0 ] . ']]';
} }
}
else
{
return $matches[0];
}
} else { } else {
// If $wgCapitalLinks is false, we can use the simple variant // If $wgCapitalLinks is false, we can use the simple variant
// of the callback function. // of the callback function.
if ( $this->checkTargetPage() ) {
$this->ltLog( "Linking (smart) '$matches[0]' to '" . $this->targetTitle . "'" );
if ( strcmp( $this->targetTitleText, $matches[ 0 ] ) == 0 ) { if ( strcmp( $this->targetTitleText, $matches[ 0 ] ) == 0 ) {
// Case-sensitive match: no need to bulid piped link. // Case-sensitive match: no need to bulid piped link.
return '[[' . $matches[ 0 ] . ']]'; return '[[' . $matches[ 0 ] . ']]';
@ -198,81 +178,6 @@ class Linker {
return '[[' . $this->targetTitleText . '|' . $matches[ 0 ] . ']]'; return '[[' . $this->targetTitleText . '|' . $matches[ 0 ] . ']]';
} }
} }
else
{
return $matches[0];
}
}
}
/// Sets member variables for the current target page.
private function newTarget( $ns, $title ) {
$this->targetTitle = \Title::makeTitleSafe( $ns, $title );
$this->ltDebugLog( 'newtarget='. $this->targetTitle->getText(), "private" );
$this->targetTitleValue = $this->targetTitle->getTitleValue();
$this->ltDebugLog( 'altTarget='. $this->targetTitleValue->getText(), "private" );
$this->targetContent = null;
}
/// Returns the content of the current target page.
/// This function serves to be used in preg_replace_callback callback
/// functions, in order to load the target page content from the
/// database only when needed.
/// @note It is absolutely necessary that the newTarget()
/// function is called for every new page.
private function getTargetContent() {
if ( ! isset( $targetContent ) ) {
$this->targetContent = \WikiPage::factory( $this->targetTitle )->getContent();
};
return $this->targetContent;
}
/// Examines the current target page. Returns true if it may be linked;
/// false if not. This depends on the settings
/// $wgLinkTitlesCheckRedirect and $wgLinkTitlesEnableNoTargetMagicWord
/// and whether the target page is a redirect or contains the
/// __NOAUTOLINKTARGET__ magic word.
/// @returns boolean
private function checkTargetPage() {
global $wgLinkTitlesEnableNoTargetMagicWord;
global $wgLinkTitlesCheckRedirect;
// If checking for redirects is enabled and the target page does
// indeed redirect to the current page, return the page title as-is
// (unlinked).
if ( $wgLinkTitlesCheckRedirect ) {
$redirectTitle = $this->getTargetContent()->getUltimateRedirectTarget();
if ( $redirectTitle && $redirectTitle->equals($this->currentTitle) ) {
return false;
}
};
// If the magic word __NOAUTOLINKTARGET__ is enabled and the target
// page does indeed contain this magic word, return the page title
// as-is (unlinked).
if ( $wgLinkTitlesEnableNoTargetMagicWord ) {
if ( $this->getTargetContent()->matchMagicWord(
\MagicWord::get('MAG_LINKTITLES_NOTARGET') ) ) {
return false;
}
};
return true;
}
/// Local Debugging output function which can send output to console as well
public function ltDebugLog($text) {
if ( $this->config->enableDebugConsoleOutput ) {
print $text . "\n";
}
wfDebugLog( 'LinkTitles', $text , 'private' );
}
/// Local Logging output function which can send output to console as well
public function ltLog($text) {
if ( $this->config->enableConsoleOutput) {
print $text . "\n";
}
wfDebugLog( 'LinkTitles', $text , 'private' );
} }
} }

200
includes/Target.php Normal file
View File

@ -0,0 +1,200 @@
<?php
/**
* The LinkTitles\Target represents a Wiki page that is a potential link target.
*
* Copyright 2012-2017 Daniel Kraus <bovender@bovender.de> ('bovender')
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* @author Daniel Kraus <bovender@bovender.de>
*/
namespace LinkTitles;
/**
* Represents a page that is a potential link target.
*/
class Target {
/**
* \TitleValue object for the current target page title.
* @var \TitleValue $titleValue;
*/
public $titleValue;
/**
* Regex that matches the start of a word; this expression depends on the
* setting of LinkTitles\Config->wordStartOnly;
* @var String $wordStart
*/
public $wordStart;
/**
* Regex that matches the end of a word; this expression depends on the
* setting of LinkTitles\Config->wordEndOnly;
* @var String $wordEnd
*/
public $wordEnd;
/**
* A Title object for the target page currently being examined.
* @var \Title $title
*/
private $title;
/**
* Caches the target page content as a \Content object.
*
* @var \Content $content
*/
private $content;
/**
* LinkTitles configuration.
* @var Config $config
*/
private $config;
/**
* Constructs a new Target object
*
* The parameters may be taken from database rows, for example.
*
* @param Int $nameSpace Name space of the target page
* @param String &$title Title of the target page
*/
public function __construct( $nameSpace, &$title, Config &$config ) {
$this->title = \Title::makeTitleSafe( $nameSpace, $title );
$this->titleValue = $this->title->getTitleValue();
$this->config = $config;
// Use unicode character properties rather than \b escape sequences
// to detect whole words containing non-ASCII characters as well.
// Note that this requires a PCRE library that was compiled with
// --enable-unicode-properties
( $config->wordStartOnly ) ? $this->wordStart = '(?<!\pL)' : $this->wordStart = '';
( $config->wordEndOnly ) ? $this->wordEnd = '(?!\pL)' : $this->wordEnd = '';
}
/**
* Gets the string representation of the target title.
* @return String title text
*/
public function getTitleText() {
return $this->title->getText();
}
/**
* Gets the title string with certain characters escaped that may interfere
* with regular expressions.
* @return String representation of the title, regex-safe
*/
public function getRegexSafeTitle() {
return preg_quote( $this->title->getText(), '/' );
}
/**
* Builds a regular expression of the title
* @return String regular expression for this title.
*/
public function getCaseSensitiveRegex() {
$regexSafeTitle = $this->getRegexSafeTitle();
// Depending on the $config->capitalLinks setting,
// the title has to be searched for either in a strictly case-sensitive
// way, or in a 'fuzzy' way where the first letter of the title may
// be either case.
//
if ( $this->config->capitalLinks && ( $regexSafeTitle[0] != '\\' )) {
$searchTerm = '((?i)' . $regexSafeTitle[0] . '(?-i)' . substr($regexSafeTitle, 1) . ')';
} else {
$searchTerm = '(' . $regexSafeTitle . ')';
}
return $this->buildRegex( $searchTerm );
}
/**
* Builds a regular expression pattern for the title in a case-insensitive
* way.
* @return String case-insensitive regular expression pattern for the title
*/
public function getCaseInsensitiveRegex() {
return $this->buildRegex( $this->getRegexSafeTitle() ) . 'i';
}
/**
* Builds the basic regex that is used to match target page titles in a source
* text.
* @param String $searchTerm Target page title (special characters must be quoted)
* @return String regular expression pattern
*/
private function buildRegex( $searchTerm ) {
return '/(?<![\:\.\@\/\?\&])' . $this->wordStart . $searchTerm . $this->wordEnd . '/S';
}
/**
* Returns the \Content of the target page.
*
* The value is cached.
* @return \Content Content of the Target page.
*/
public function getContent() {
if ( $this->content === null ) {
$this->content = \WikiPage::factory( $this->title )->getContent();
};
return $this->content;
}
/**
* Examines the current target page. Returns true if it may be linked;
* false if not. This depends on two settings:
* $wgLinkTitlesCheckRedirect and $wgLinkTitlesEnableNoTargetMagicWord
* and whether the target page is a redirect or contains the
* __NOAUTOLINKTARGET__ magic word.
*
* @param \Title $fromTitle
*
* @return boolean
*/
public function mayLinkTo( \Title $fromTitle ) {
// If checking for redirects is enabled and the target page does
// indeed redirect to the current page, return the page title as-is
// (unlinked).
if ( $this->config->checkRedirect ) {
$redirectTitle = $this->getContent()->getUltimateRedirectTarget();
if ( $redirectTitle && $redirectTitle->equals( $fromtitle ) ) {
return false;
}
};
// If the magic word __NOAUTOLINKTARGET__ is enabled and the target
// page does indeed contain this magic word, return the page title
// as-is (unlinked).
if ( $this->config->enableNoTargetMagicWord ) {
if ( $this->getContent()->matchMagicWord( \MagicWord::get('MAG_LINKTITLES_NOTARGET') ) ) {
return false;
}
};
return true;
}
/**
* Determines if the Target's title is the same as another title.
* @param Title $otherTitle Other title
* @return boolean True if the $otherTitle is the same, false if not.
*/
public function isSameTitle( \Title $otherTitle) {
return $this->title->equals( $otherTitle );
}
}