mirror of
https://github.com/diocloid/LinkTitles.git
synced 2025-07-13 09:49:31 +02:00
Cache delimiters used in regular expressions.
- CHANGE: Improve performance.
This commit is contained in:
Daniel Kraus
@ -44,6 +44,14 @@
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/// as a string.
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private static $targetTitleText;
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/// Delimiter used in a regexp split operation to seperate those parts
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/// of the page that should be parsed from those that should not be
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/// parsed (e.g. inside pre-existing links etc.).
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private static $delimiter;
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private static $wordStartDelim;
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private static $wordEndDelim;
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/// Setup function, hooks the extension's functions to MediaWiki events.
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public static function setup() {
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global $wgLinkTitlesParseOnEdit;
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@ -56,6 +64,7 @@
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$wgHooks['InternalParseBeforeLinks'][] = 'LinkTitles::onInternalParseBeforeLinks';
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};
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$wgHooks['GetDoubleUnderscoreIDs'][] = 'LinkTitles::onGetDoubleUnderscoreIDs';
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self::BuildDelimiters();
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}
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/// Event handler that is hooked to the PageContentSave event.
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@ -95,69 +104,17 @@
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// Configuration variables need to be defined here as globals.
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global $wgLinkTitlesPreferShortTitles;
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global $wgLinkTitlesMinimumTitleLength;
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global $wgLinkTitlesParseHeadings;
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global $wgLinkTitlesBlackList;
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global $wgLinkTitlesSkipTemplates;
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global $wgLinkTitlesFirstOnly;
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global $wgLinkTitlesWordStartOnly;
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global $wgLinkTitlesWordEndOnly;
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global $wgLinkTitlesSmartMode;
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global $wgCapitalLinks;
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// Use unicode character properties rather than \b escape sequences
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// to detect whole words containing non-ASCII characters as well.
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// Note that this requires the use of the '/u' switch, and you need
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// to have PHP with a PCRE library that was compiled with
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// --enable-unicode-properties
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( $wgLinkTitlesWordStartOnly ) ? $wordStartDelim = '(?<!\pL)' : $wordStartDelim = '';
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( $wgLinkTitlesWordEndOnly ) ? $wordEndDelim = '(?!\pL)' : $wordEndDelim = '';
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( $wgLinkTitlesPreferShortTitles ) ? $sort_order = 'ASC' : $sort_order = 'DESC';
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( $wgLinkTitlesFirstOnly ) ? $limit = 1 : $limit = -1;
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if ( $wgLinkTitlesSkipTemplates )
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{
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$templatesDelimiter = '{{[^}]+}}|';
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} else {
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// Match template names (ignoring any piped [[]] links in them)
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// along with the trailing pipe and parameter name or closing
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// braces; also match sequences of '|wordcharacters=' (without
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// spaces in them) that usually only occur as parameter names in
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// transclusions (but could also occur as wiki table cell contents).
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// TODO: Find a way to match parameter names in transclusions, but
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// not in table cells or other sequences involving a pipe character
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// and equal sign.
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$templatesDelimiter = '{{[^|]*?(?:(?:\[\[[^]]+]])?)[^|]*?(?:\|(?:\w+=)?|(?:}}))|\|\w+=|';
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};
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LinkTitles::$currentTitle = $title;
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$newText = $text;
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// Build a regular expression that will capture existing wiki links ("[[...]]"),
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// wiki headings ("= ... =", "== ... ==" etc.),
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// urls ("http://example.com", "[http://example.com]", "[http://example.com Description]",
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// and email addresses ("mail@example.com").
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// Since there is a user option to skip headings, we make this part of the expression
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// optional. Note that in order to use preg_split(), it is important to have only one
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// capturing subpattern (which precludes the use of conditional subpatterns).
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( $wgLinkTitlesParseHeadings ) ? $delimiter = '' : $delimiter = '=+.+?=+|';
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$urlPattern = '[a-z]+?\:\/\/(?:\S+\.)+\S+(?:\/.*)?';
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$delimiter = '/(' . // exclude from linking:
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'\[\[.*?\]\]|' . // links
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$delimiter . // titles (if requested)
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$templatesDelimiter . // templates (if requested)
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'^ .+?\n|\n .+?\n|\n .+?$|^ .+?$|' . // preformatted text
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'<nowiki>.*?<.nowiki>|<code>.*?<\/code>|' . // nowiki/code
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'<pre>.*?<\/pre>|<html>.*?<\/html>|' . // pre/html
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'<script>.*?<\/script>|' . // script
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'<div.+?>|<\/div>|' . // attributes of div elements
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'<span.+?>|<\/span>|' . // attributes of span elements
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'<file>[^<]*<\/file>|' . // attributes of span elements
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'style=".+?"|class=".+?"|' . // styles and classes (e.g. of wikitables)
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'\[' . $urlPattern . '\s.+?\]|'. $urlPattern . '(?=\s|$)|' . // urls
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'(?<=\b)\S+\@(?:\S+\.)+\S+(?=\b)' . // email addresses
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')/ism';
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// Build a blacklist of pages that are not supposed to be link
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// targets. This includes the current page.
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$blackList = str_replace( '_', ' ',
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@ -202,7 +159,7 @@
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// split the page content by [[...]] groups
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// credits to inhan @ StackOverflow for suggesting preg_split
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// see http://stackoverflow.com/questions/10672286
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$arr = preg_split( $delimiter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE );
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$arr = preg_split( self::$delimiter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE );
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// Escape certain special characters in the page title to prevent
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// regexp compilation errors
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@ -223,7 +180,7 @@
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for ( $i = 0; $i < count( $arr ); $i+=2 ) {
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// even indexes will point to text that is not enclosed by brackets
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$arr[$i] = preg_replace_callback( '/(?<![\:\.\@\/\?\&])' .
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$wordStartDelim . $searchTerm . $wordEndDelim . '/u',
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self::$wordStartDelim . $searchTerm . self::$wordEndDelim . '/u',
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array('LinkTitles', 'simpleModeCallback'), $arr[$i], $limit, $count );
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if (( $limit >= 0 ) && ( $count > 0 )) {
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break;
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@ -235,13 +192,13 @@
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// pass on the page and add links with aliases where the case does
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// not match.
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if ($wgLinkTitlesSmartMode) {
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$arr = preg_split( $delimiter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE );
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$arr = preg_split( self::$delimiter, $newText, -1, PREG_SPLIT_DELIM_CAPTURE );
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for ( $i = 0; $i < count( $arr ); $i+=2 ) {
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// even indexes will point to text that is not enclosed by brackets
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$arr[$i] = preg_replace_callback( '/(?<![\:\.\@\/\?\&])' .
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$wordStartDelim . '(' . $quotedTitle . ')' .
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$wordEndDelim . '/iu', array('LinkTitles', 'smartModeCallback'),
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self::$wordStartDelim . '(' . $quotedTitle . ')' .
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self::$wordEndDelim . '/iu', array('LinkTitles', 'smartModeCallback'),
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$arr[$i], $limit, $count );
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if (( $limit >= 0 ) && ( $count > 0 )) {
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break;
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@ -399,6 +356,65 @@
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};
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return true;
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}
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/// Builds the delimiter that is used in a regexp to separate
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/// text that should be parsed from text that should not be
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/// parsed (e.g. inside existing links etc.)
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private static function BuildDelimiters() {
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// Configuration variables need to be defined here as globals.
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global $wgLinkTitlesParseHeadings;
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global $wgLinkTitlesSkipTemplates;
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global $wgLinkTitlesWordStartOnly;
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global $wgLinkTitlesWordEndOnly;
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// Use unicode character properties rather than \b escape sequences
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// to detect whole words containing non-ASCII characters as well.
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// Note that this requires the use of the '/u' switch, and you need
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// to have PHP with a PCRE library that was compiled with
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// --enable-unicode-properties
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( $wgLinkTitlesWordStartOnly ) ? self::$wordStartDelim = '(?<!\pL)' : self::$wordStartDelim = '';
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( $wgLinkTitlesWordEndOnly ) ? self::$wordEndDelim = '(?!\pL)' : self::$wordEndDelim = '';
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if ( $wgLinkTitlesSkipTemplates )
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{
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$templatesDelimiter = '{{[^}]+}}|';
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} else {
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// Match template names (ignoring any piped [[]] links in them)
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// along with the trailing pipe and parameter name or closing
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// braces; also match sequences of '|wordcharacters=' (without
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// spaces in them) that usually only occur as parameter names in
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// transclusions (but could also occur as wiki table cell contents).
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// TODO: Find a way to match parameter names in transclusions, but
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// not in table cells or other sequences involving a pipe character
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// and equal sign.
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$templatesDelimiter = '{{[^|]*?(?:(?:\[\[[^]]+]])?)[^|]*?(?:\|(?:\w+=)?|(?:}}))|\|\w+=|';
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}
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// Build a regular expression that will capture existing wiki links ("[[...]]"),
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// wiki headings ("= ... =", "== ... ==" etc.),
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// urls ("http://example.com", "[http://example.com]", "[http://example.com Description]",
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// and email addresses ("mail@example.com").
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// Since there is a user option to skip headings, we make this part of the expression
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// optional. Note that in order to use preg_split(), it is important to have only one
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// capturing subpattern (which precludes the use of conditional subpatterns).
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( $wgLinkTitlesParseHeadings ) ? $delimiter = '' : $delimiter = '=+.+?=+|';
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$urlPattern = '[a-z]+?\:\/\/(?:\S+\.)+\S+(?:\/.*)?';
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self::$delimiter = '/(' . // exclude from linking:
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'\[\[.*?\]\]|' . // links
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$delimiter . // titles (if requested)
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$templatesDelimiter . // templates (if requested)
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'^ .+?\n|\n .+?\n|\n .+?$|^ .+?$|' . // preformatted text
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'<nowiki>.*?<.nowiki>|<code>.*?<\/code>|' . // nowiki/code
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'<pre>.*?<\/pre>|<html>.*?<\/html>|' . // pre/html
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'<script>.*?<\/script>|' . // script
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'<div.+?>|<\/div>|' . // attributes of div elements
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'<span.+?>|<\/span>|' . // attributes of span elements
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'<file>[^<]*<\/file>|' . // stuff inside file elements
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'style=".+?"|class=".+?"|' . // styles and classes (e.g. of wikitables)
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'\[' . $urlPattern . '\s.+?\]|'. $urlPattern . '(?=\s|$)|' . // urls
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'(?<=\b)\S+\@(?:\S+\.)+\S+(?=\b)' . // email addresses
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')/ism';
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}
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}
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// vim: ts=2:sw=2:noet:comments^=\:///
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