MediaWiki  master
LinkRenderer.php
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1 <?php
21 namespace MediaWiki\Linker;
22 
23 use DummyLinker;
24 use Hooks;
25 use Html;
26 use HtmlArmor;
27 use LinkCache;
28 use Linker;
30 use NamespaceInfo;
31 use Sanitizer;
32 use Title;
33 use TitleFormatter;
34 
41 class LinkRenderer {
42 
48  private $forceArticlePath = false;
49 
55  private $expandUrls = false;
56 
60  private $stubThreshold = 0;
61 
65  private $titleFormatter;
66 
70  private $linkCache;
71 
75  private $nsInfo;
76 
82  private $runLegacyBeginHook = true;
83 
89  public function __construct(
91  ) {
92  $this->titleFormatter = $titleFormatter;
93  $this->linkCache = $linkCache;
94  $this->nsInfo = $nsInfo;
95  }
96 
100  public function setForceArticlePath( $force ) {
101  $this->forceArticlePath = $force;
102  }
103 
107  public function getForceArticlePath() {
109  }
110 
114  public function setExpandURLs( $expand ) {
115  $this->expandUrls = $expand;
116  }
117 
121  public function getExpandURLs() {
122  return $this->expandUrls;
123  }
124 
128  public function setStubThreshold( $threshold ) {
129  $this->stubThreshold = $threshold;
130  }
131 
135  public function getStubThreshold() {
136  return $this->stubThreshold;
137  }
138 
142  public function setRunLegacyBeginHook( $run ) {
143  $this->runLegacyBeginHook = $run;
144  }
145 
153  public function makeLink(
154  LinkTarget $target, $text = null, array $extraAttribs = [], array $query = []
155  ) {
156  $title = Title::newFromLinkTarget( $target );
157  if ( $title->isKnown() ) {
158  return $this->makeKnownLink( $target, $text, $extraAttribs, $query );
159  } else {
160  return $this->makeBrokenLink( $target, $text, $extraAttribs, $query );
161  }
162  }
163 
170  private function getLegacyOptions( $isKnown ) {
171  $options = [ 'stubThreshold' => $this->stubThreshold ];
172  if ( $this->forceArticlePath ) {
173  $options[] = 'forcearticlepath';
174  }
175  if ( $this->expandUrls === PROTO_HTTP ) {
176  $options[] = 'http';
177  } elseif ( $this->expandUrls === PROTO_HTTPS ) {
178  $options[] = 'https';
179  }
180 
181  $options[] = $isKnown ? 'known' : 'broken';
182 
183  return $options;
184  }
185 
186  private function runBeginHook( LinkTarget $target, &$text, &$extraAttribs, &$query, $isKnown ) {
187  $ret = null;
188  if ( !Hooks::run( 'HtmlPageLinkRendererBegin',
189  [ $this, $target, &$text, &$extraAttribs, &$query, &$ret ] )
190  ) {
191  return $ret;
192  }
193 
194  // Now run the legacy hook
195  return $this->runLegacyBeginHook( $target, $text, $extraAttribs, $query, $isKnown );
196  }
197 
198  private function runLegacyBeginHook( LinkTarget $target, &$text, &$extraAttribs, &$query,
199  $isKnown
200  ) {
201  if ( !$this->runLegacyBeginHook || !Hooks::isRegistered( 'LinkBegin' ) ) {
202  // Disabled, or nothing registered
203  return null;
204  }
205 
206  $realOptions = $options = $this->getLegacyOptions( $isKnown );
207  $ret = null;
208  $dummy = new DummyLinker();
209  $title = Title::newFromLinkTarget( $target );
210  if ( $text !== null ) {
211  $realHtml = $html = HtmlArmor::getHtml( $text );
212  } else {
213  $realHtml = $html = null;
214  }
215  if ( !Hooks::run( 'LinkBegin',
216  [ $dummy, $title, &$html, &$extraAttribs, &$query, &$options, &$ret ], '1.28' )
217  ) {
218  return $ret;
219  }
220 
221  if ( $html !== null && $html !== $realHtml ) {
222  // &$html was modified, so re-armor it as $text
223  $text = new HtmlArmor( $html );
224  }
225 
226  // Check if they changed any of the options, hopefully not!
227  if ( $options !== $realOptions ) {
228  $factory = MediaWikiServices::getInstance()->getLinkRendererFactory();
229  // They did, so create a separate instance and have that take over the rest
230  $newRenderer = $factory->createFromLegacyOptions( $options );
231  // Don't recurse the hook...
232  $newRenderer->setRunLegacyBeginHook( false );
233  if ( in_array( 'known', $options, true ) ) {
234  return $newRenderer->makeKnownLink( $title, $text, $extraAttribs, $query );
235  } elseif ( in_array( 'broken', $options, true ) ) {
236  return $newRenderer->makeBrokenLink( $title, $text, $extraAttribs, $query );
237  } else {
238  return $newRenderer->makeLink( $title, $text, $extraAttribs, $query );
239  }
240  }
241 
242  return null;
243  }
244 
256  public function makePreloadedLink(
257  LinkTarget $target, $text = null, $classes = '', array $extraAttribs = [], array $query = []
258  ) {
259  // Run begin hook
260  $ret = $this->runBeginHook( $target, $text, $extraAttribs, $query, true );
261  if ( $ret !== null ) {
262  return $ret;
263  }
264  $target = $this->normalizeTarget( $target );
265  $url = $this->getLinkURL( $target, $query );
266  $attribs = [ 'class' => $classes ];
267  $prefixedText = $this->titleFormatter->getPrefixedText( $target );
268  if ( $prefixedText !== '' ) {
269  $attribs['title'] = $prefixedText;
270  }
271 
272  $attribs = [
273  'href' => $url,
274  ] + $this->mergeAttribs( $attribs, $extraAttribs );
275 
276  if ( $text === null ) {
277  $text = $this->getLinkText( $target );
278  }
279 
280  return $this->buildAElement( $target, $text, $attribs, true );
281  }
282 
290  public function makeKnownLink(
291  LinkTarget $target, $text = null, array $extraAttribs = [], array $query = []
292  ) {
293  $classes = [];
294  if ( $target->isExternal() ) {
295  $classes[] = 'extiw';
296  }
297  $colour = $this->getLinkClasses( $target );
298  if ( $colour !== '' ) {
299  $classes[] = $colour;
300  }
301 
302  return $this->makePreloadedLink(
303  $target,
304  $text,
305  implode( ' ', $classes ),
306  $extraAttribs,
307  $query
308  );
309  }
310 
318  public function makeBrokenLink(
319  LinkTarget $target, $text = null, array $extraAttribs = [], array $query = []
320  ) {
321  // Run legacy hook
322  $ret = $this->runBeginHook( $target, $text, $extraAttribs, $query, false );
323  if ( $ret !== null ) {
324  return $ret;
325  }
326 
327  # We don't want to include fragments for broken links, because they
328  # generally make no sense.
329  if ( $target->hasFragment() ) {
330  $target = $target->createFragmentTarget( '' );
331  }
332  $target = $this->normalizeTarget( $target );
333 
334  if ( !isset( $query['action'] ) && $target->getNamespace() !== NS_SPECIAL ) {
335  $query['action'] = 'edit';
336  $query['redlink'] = '1';
337  }
338 
339  $url = $this->getLinkURL( $target, $query );
340  $attribs = [ 'class' => 'new' ];
341  $prefixedText = $this->titleFormatter->getPrefixedText( $target );
342  if ( $prefixedText !== '' ) {
343  // This ends up in parser cache!
344  $attribs['title'] = wfMessage( 'red-link-title', $prefixedText )
345  ->inContentLanguage()
346  ->text();
347  }
348 
349  $attribs = [
350  'href' => $url,
351  ] + $this->mergeAttribs( $attribs, $extraAttribs );
352 
353  if ( $text === null ) {
354  $text = $this->getLinkText( $target );
355  }
356 
357  return $this->buildAElement( $target, $text, $attribs, false );
358  }
359 
369  private function buildAElement( LinkTarget $target, $text, array $attribs, $isKnown ) {
370  $ret = null;
371  if ( !Hooks::run( 'HtmlPageLinkRendererEnd',
372  [ $this, $target, $isKnown, &$text, &$attribs, &$ret ] )
373  ) {
374  return $ret;
375  }
376 
377  $html = HtmlArmor::getHtml( $text );
378 
379  // Run legacy hook
380  if ( Hooks::isRegistered( 'LinkEnd' ) ) {
381  $dummy = new DummyLinker();
382  $title = Title::newFromLinkTarget( $target );
383  $options = $this->getLegacyOptions( $isKnown );
384  if ( !Hooks::run( 'LinkEnd',
385  [ $dummy, $title, $options, &$html, &$attribs, &$ret ], '1.28' )
386  ) {
387  return $ret;
388  }
389  }
390 
391  return Html::rawElement( 'a', $attribs, $html );
392  }
393 
398  private function getLinkText( LinkTarget $target ) {
399  $prefixedText = $this->titleFormatter->getPrefixedText( $target );
400  // If the target is just a fragment, with no title, we return the fragment
401  // text. Otherwise, we return the title text itself.
402  if ( $prefixedText === '' && $target->hasFragment() ) {
403  return $target->getFragment();
404  }
405 
406  return $prefixedText;
407  }
408 
409  private function getLinkURL( LinkTarget $target, array $query = [] ) {
410  // TODO: Use a LinkTargetResolver service instead of Title
411  $title = Title::newFromLinkTarget( $target );
412  if ( $this->forceArticlePath ) {
413  $realQuery = $query;
414  $query = [];
415  } else {
416  $realQuery = [];
417  }
418  $url = $title->getLinkURL( $query, false, $this->expandUrls );
419 
420  if ( $this->forceArticlePath && $realQuery ) {
421  $url = wfAppendQuery( $url, $realQuery );
422  }
423 
424  return $url;
425  }
426 
434  private function normalizeTarget( LinkTarget $target ) {
435  return Linker::normaliseSpecialPage( $target );
436  }
437 
446  private function mergeAttribs( $defaults, $attribs ) {
447  if ( !$attribs ) {
448  return $defaults;
449  }
450  # Merge the custom attribs with the default ones, and iterate
451  # over that, deleting all "false" attributes.
452  $ret = [];
453  $merged = Sanitizer::mergeAttributes( $defaults, $attribs );
454  foreach ( $merged as $key => $val ) {
455  # A false value suppresses the attribute
456  if ( $val !== false ) {
457  $ret[$key] = $val;
458  }
459  }
460  return $ret;
461  }
462 
469  public function getLinkClasses( LinkTarget $target ) {
470  // Make sure the target is in the cache
471  $id = $this->linkCache->addLinkObj( $target );
472  if ( $id == 0 ) {
473  // Doesn't exist
474  return '';
475  }
476 
477  if ( $this->linkCache->getGoodLinkFieldObj( $target, 'redirect' ) ) {
478  # Page is a redirect
479  return 'mw-redirect';
480  } elseif (
481  $this->stubThreshold > 0 && $this->nsInfo->isContent( $target->getNamespace() ) &&
482  $this->linkCache->getGoodLinkFieldObj( $target, 'length' ) < $this->stubThreshold
483  ) {
484  # Page is a stub
485  return 'stub';
486  }
487 
488  return '';
489  }
490 }
buildAElement(LinkTarget $target, $text, array $attribs, $isKnown)
Builds the final element.
string bool int $expandUrls
A PROTO_* constant or false.
getLinkURL(LinkTarget $target, array $query=[])
getLinkClasses(LinkTarget $target)
Return the CSS classes of a known link.
hasFragment()
Whether the link target has a fragment.
static getHtml( $input)
Provide a string or HtmlArmor object and get safe HTML back.
Definition: HtmlArmor.php:50
createFragmentTarget( $fragment)
Creates a new LinkTarget for a different fragment of the same page.
__construct(TitleFormatter $titleFormatter, LinkCache $linkCache, NamespaceInfo $nsInfo)
makeBrokenLink(LinkTarget $target, $text=null, array $extraAttribs=[], array $query=[])
static rawElement( $element, $attribs=[], $contents='')
Returns an HTML element in a string.
Definition: Html.php:209
static normaliseSpecialPage(LinkTarget $target)
Definition: Linker.php:207
const NS_SPECIAL
Definition: Defines.php:49
getLinkText(LinkTarget $target)
mergeAttribs( $defaults, $attribs)
Merges two sets of attributes.
normalizeTarget(LinkTarget $target)
Normalizes the provided target.
static getInstance()
Returns the global default instance of the top level service locator.
getNamespace()
Get the namespace index.
getFragment()
Get the link fragment (i.e.
isExternal()
Whether this LinkTarget has an interwiki component.
wfAppendQuery( $url, $query)
Append a query string to an existing URL, which may or may not already have query string parameters a...
const PROTO_HTTPS
Definition: Defines.php:200
Class that generates HTML links for pages.
Some internal bits split of from Skin.php.
Definition: Linker.php:35
if(! $dbr->tableExists( 'profiling')) $expand
static mergeAttributes( $a, $b)
Merge two sets of HTML attributes.
Definition: Sanitizer.php:936
makeKnownLink(LinkTarget $target, $text=null, array $extraAttribs=[], array $query=[])
const PROTO_HTTP
Definition: Defines.php:199
static newFromLinkTarget(LinkTarget $linkTarget, $forceClone='')
Returns a Title given a LinkTarget.
Definition: Title.php:271
static isRegistered( $name)
Returns true if a hook has a function registered to it.
Definition: Hooks.php:80
bool $forceArticlePath
Whether to force the pretty article path.
makePreloadedLink(LinkTarget $target, $text=null, $classes='', array $extraAttribs=[], array $query=[])
If you have already looked up the proper CSS classes using LinkRenderer::getLinkClasses() or some oth...
runBeginHook(LinkTarget $target, &$text, &$extraAttribs, &$query, $isKnown)
makeLink(LinkTarget $target, $text=null, array $extraAttribs=[], array $query=[])
getLegacyOptions( $isKnown)
Get the options in the legacy format.
wfMessage( $key,... $params)
This is the function for getting translated interface messages.
bool $runLegacyBeginHook
Whether to run the legacy Linker hooks.
runLegacyBeginHook(LinkTarget $target, &$text, &$extraAttribs, &$query, $isKnown)
static run( $event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:200