4c63ef444a
* Scan the C++ for volatile classes and show a warning with a list of them * Fixed volatile classes Revision, CoreLinkFunctions and FileRepoStatus, made them non-volatile by patching the referring code * Added some configuration for the build process to DefaultSettings.php. * Split a few functions off MakeHipHop::execute() * Only include UtfNormalDefines.php in interpreted mode, since in compiled mode, the constants exist from startup * Apparently HipHop does not support set_exception_handler(). Added a try/catch block around the main part of index.php instead. * Fixed ini_get() dependencies in Special:Upload. Upload now works, if you disable ZipDirectoryReader.
308 lines
10 KiB
PHP
308 lines
10 KiB
PHP
<?php
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/**
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* Modified version of the PHP parser with hooks for wiki links; experimental
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*
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* @file
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*/
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/**
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* Parser with LinkHooks experiment
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* @ingroup Parser
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*/
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class Parser_LinkHooks extends Parser {
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/**
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* Update this version number when the ParserOutput format
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* changes in an incompatible way, so the parser cache
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* can automatically discard old data.
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*/
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const VERSION = '1.6.4';
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# Flags for Parser::setLinkHook
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# Also available as global constants from Defines.php
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const SLH_PATTERN = 1;
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# Constants needed for external link processing
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# Everything except bracket, space, or control characters
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const EXT_LINK_URL_CLASS = '[^][<>"\\x00-\\x20\\x7F]';
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const EXT_IMAGE_REGEX = '/^(http:\/\/|https:\/\/)([^][<>"\\x00-\\x20\\x7F]+)
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\\/([A-Za-z0-9_.,~%\\-+&;#*?!=()@\\x80-\\xFF]+)\\.((?i)gif|png|jpg|jpeg)$/Sx';
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/**#@+
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* @private
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*/
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# Persistent:
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var $mLinkHooks;
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/**#@-*/
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/**
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* Constructor
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*/
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public function __construct( $conf = array() ) {
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parent::__construct( $conf );
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$this->mLinkHooks = array();
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}
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/**
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* Do various kinds of initialisation on the first call of the parser
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*/
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function firstCallInit() {
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parent::__construct();
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if ( !$this->mFirstCall ) {
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return;
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}
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$this->mFirstCall = false;
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wfProfileIn( __METHOD__ );
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$this->setHook( 'pre', array( $this, 'renderPreTag' ) );
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CoreParserFunctions::register( $this );
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CoreLinkFunctions::register( $this );
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$this->initialiseVariables();
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wfRunHooks( 'ParserFirstCallInit', array( &$this ) );
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wfProfileOut( __METHOD__ );
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}
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/**
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* Create a link hook, e.g. [[Namepsace:...|display}}
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* The callback function should have the form:
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* function myLinkCallback( $parser, $holders, $markers,
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* Title $title, $titleText, &$sortText = null, &$leadingColon = false ) { ... }
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*
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* Or with SLH_PATTERN:
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* function myLinkCallback( $parser, $holders, $markers, )
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* &$titleText, &$sortText = null, &$leadingColon = false ) { ... }
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*
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* The callback may either return a number of different possible values:
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* String) Text result of the link
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* True) (Treat as link) Parse the link according to normal link rules
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* False) (Bad link) Just output the raw wikitext (You may modify the text first)
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*
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* @param $ns Integer or String: the Namespace ID or regex pattern if SLH_PATTERN is set
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* @param $callback Mixed: the callback function (and object) to use
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* @param $flags Integer: a combination of the following flags:
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* SLH_PATTERN Use a regex link pattern rather than a namespace
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*
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* @return The old callback function for this name, if any
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*/
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public function setLinkHook( $ns, $callback, $flags = 0 ) {
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if( $flags & SLH_PATTERN && !is_string($ns) )
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throw new MWException( __METHOD__.'() expecting a regex string pattern.' );
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elseif( $flags | ~SLH_PATTERN && !is_int($ns) )
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throw new MWException( __METHOD__.'() expecting a namespace index.' );
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$oldVal = isset( $this->mLinkHooks[$ns] ) ? $this->mLinkHooks[$ns][0] : null;
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$this->mLinkHooks[$ns] = array( $callback, $flags );
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return $oldVal;
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}
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/**
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* Get all registered link hook identifiers
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*
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* @return array
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*/
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function getLinkHooks() {
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return array_keys( $this->mLinkHooks );
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}
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/**
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* Process [[ ]] wikilinks
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* @return LinkHolderArray
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*
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* @private
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*/
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function replaceInternalLinks2( &$s ) {
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wfProfileIn( __METHOD__ );
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wfProfileIn( __METHOD__.'-setup' );
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static $tc = FALSE, $titleRegex;//$e1, $e1_img;
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if( !$tc ) {
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# the % is needed to support urlencoded titles as well
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$tc = Title::legalChars() . '#%';
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# Match a link having the form [[namespace:link|alternate]]trail
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//$e1 = "/^([{$tc}]+)(?:\\|(.+?))?]](.*)\$/sD";
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# Match cases where there is no "]]", which might still be images
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//$e1_img = "/^([{$tc}]+)\\|(.*)\$/sD";
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# Match a valid plain title
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$titleRegex = "/^([{$tc}]+)$/sD";
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}
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$holders = new LinkHolderArray( $this );
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if( is_null( $this->mTitle ) ) {
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wfProfileOut( __METHOD__ );
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wfProfileOut( __METHOD__.'-setup' );
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throw new MWException( __METHOD__.": \$this->mTitle is null\n" );
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}
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wfProfileOut( __METHOD__.'-setup' );
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$offset = 0;
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$offsetStack = array();
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$markers = new LinkMarkerReplacer( $this, $holders, array( &$this, 'replaceInternalLinksCallback' ) );
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while( true ) {
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$startBracketOffset = strpos( $s, '[[', $offset );
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$endBracketOffset = strpos( $s, ']]', $offset );
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# Finish when there are no more brackets
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if( $startBracketOffset === false && $endBracketOffset === false ) break;
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# Determine if the bracket is a starting or ending bracket
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# When we find both, use the first one
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elseif( $startBracketOffset !== false && $endBracketOffset !== false )
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$isStart = $startBracketOffset <= $endBracketOffset;
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# When we only found one, check which it is
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else $isStart = $startBracketOffset !== false;
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$bracketOffset = $isStart ? $startBracketOffset : $endBracketOffset;
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if( $isStart ) {
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/** Opening bracket **/
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# Just push our current offset in the string onto the stack
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$offsetStack[] = $startBracketOffset;
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} else {
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/** Closing bracket **/
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# Pop the start pos for our current link zone off the stack
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$startBracketOffset = array_pop($offsetStack);
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# Just to clean up the code, lets place offsets on the outer ends
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$endBracketOffset += 2;
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# Only do logic if we actually have a opening bracket for this
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if( isset($startBracketOffset) ) {
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# Extract text inside the link
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@list( $titleText, $paramText ) = explode('|',
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substr($s, $startBracketOffset+2, $endBracketOffset-$startBracketOffset-4), 2);
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# Create markers only for valid links
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if( preg_match( $titleRegex, $titleText ) ) {
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# Store the text for the marker
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$marker = $markers->addMarker($titleText, $paramText);
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# Replace the current link with the marker
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$s = substr($s,0,$startBracketOffset).
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$marker.
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substr($s, $endBracketOffset);
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# We have modified $s, because of this we need to set the
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# offset manually since the end position is different now
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$offset = $startBracketOffset+strlen($marker);
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continue;
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}
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# ToDo: Some LinkHooks may allow recursive links inside of
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# the link text, create a regex that also matches our
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# <!-- LINKMARKER ### --> sequence in titles
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# ToDO: Some LinkHooks use patterns rather than namespaces
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# these need to be tested at this point here
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}
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}
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# Bump our offset to after our current bracket
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$offset = $bracketOffset+2;
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}
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# Now expand our tree
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wfProfileIn( __METHOD__.'-expand' );
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$s = $markers->expand( $s );
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wfProfileOut( __METHOD__.'-expand' );
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wfProfileOut( __METHOD__ );
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return $holders;
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}
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function replaceInternalLinksCallback( $parser, $holders, $markers, $titleText, $paramText ) {
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wfProfileIn( __METHOD__ );
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$wt = isset($paramText) ? "[[$titleText|$paramText]]" : "[[$titleText]]";
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wfProfileIn( __METHOD__."-misc" );
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# Don't allow internal links to pages containing
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# PROTO: where PROTO is a valid URL protocol; these
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# should be external links.
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if( preg_match('/^\b(?:' . wfUrlProtocols() . ')/', $titleText) ) {
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wfProfileOut( __METHOD__ );
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return $wt;
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}
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# Make subpage if necessary
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if( $this->areSubpagesAllowed() ) {
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$titleText = $this->maybeDoSubpageLink( $titleText, $paramText );
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}
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# Check for a leading colon and strip it if it is there
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$leadingColon = $titleText[0] == ':';
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if( $leadingColon ) $titleText = substr( $titleText, 1 );
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wfProfileOut( __METHOD__."-misc" );
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# Make title object
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wfProfileIn( __METHOD__."-title" );
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$title = Title::newFromText( $this->mStripState->unstripNoWiki( $titleText ) );
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if( !$title ) {
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wfProfileOut( __METHOD__."-title" );
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wfProfileOut( __METHOD__ );
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return $wt;
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}
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$ns = $title->getNamespace();
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wfProfileOut( __METHOD__."-title" );
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# Default for Namespaces is a default link
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# ToDo: Default for patterns is plain wikitext
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$return = true;
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if( isset( $this->mLinkHooks[$ns] ) ) {
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list( $callback, $flags ) = $this->mLinkHooks[$ns];
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if( $flags & SLH_PATTERN ) {
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$args = array( $parser, $holders, $markers, $titleText, &$paramText, &$leadingColon );
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} else {
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$args = array( $parser, $holders, $markers, $title, $titleText, &$paramText, &$leadingColon );
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}
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# Workaround for PHP bug 35229 and similar
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if ( !is_callable( $callback ) ) {
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throw new MWException( "Tag hook for namespace $ns is not callable\n" );
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}
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$return = call_user_func_array( $callback, $args );
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}
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if( $return === true ) {
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# True (treat as plain link) was returned, call the defaultLinkHook
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$return = CoreLinkFunctions::defaultLinkHook( $parser, $holders, $markers, $title,
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$titleText, $paramText, $leadingColon );
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}
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if( $return === false ) {
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# False (no link) was returned, output plain wikitext
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# Build it again as the hook is allowed to modify $paramText
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$return = isset($paramText) ? "[[$titleText|$paramText]]" : "[[$titleText]]";
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}
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# Content was returned, return it
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wfProfileOut( __METHOD__ );
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return $return;
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}
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}
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class LinkMarkerReplacer {
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protected $markers, $nextId, $parser, $holders, $callback;
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function __construct( $parser, $holders, $callback ) {
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$this->nextId = 0;
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$this->markers = array();
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$this->parser = $parser;
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$this->holders = $holders;
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$this->callback = $callback;
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}
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function addMarker($titleText, $paramText) {
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$id = $this->nextId++;
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$this->markers[$id] = array( $titleText, $paramText );
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return "<!-- LINKMARKER $id -->";
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}
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function findMarker( $string ) {
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return (bool) preg_match('/<!-- LINKMARKER [0-9]+ -->/', $string );
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}
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function expand( $string ) {
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return StringUtils::delimiterReplaceCallback( "<!-- LINKMARKER ", " -->", array( &$this, 'callback' ), $string );
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}
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function callback( $m ) {
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$id = intval($m[1]);
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if( !array_key_exists($id, $this->markers) ) return $m[0];
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$args = $this->markers[$id];
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array_unshift( $args, $this );
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array_unshift( $args, $this->holders );
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array_unshift( $args, $this->parser );
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return call_user_func_array( $this->callback, $args );
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}
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}
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