MediaWiki  master
MediaTransformOutput.php
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1 <?php
29 abstract class MediaTransformOutput {
33  public $responsiveUrls = [];
34 
36  protected $file;
37 
39  protected $width;
40 
42  protected $height;
43 
45  protected $url;
46 
48  protected $page;
49 
51  protected $path;
52 
54  protected $lang;
55 
57  protected $storagePath = false;
58 
62  public function getWidth() {
63  return $this->width;
64  }
65 
69  public function getHeight() {
70  return $this->height;
71  }
72 
76  public function getFile() {
77  return $this->file;
78  }
79 
85  public function getExtension() {
86  return $this->path ? FileBackend::extensionFromPath( $this->path ) : false;
87  }
88 
92  public function getUrl() {
93  return $this->url;
94  }
95 
99  public function getStoragePath() {
100  return $this->storagePath;
101  }
102 
107  public function setStoragePath( $storagePath ) {
108  $this->storagePath = $storagePath;
109  if ( $this->path === false ) {
110  $this->path = $storagePath;
111  }
112  }
113 
134  abstract public function toHtml( $options = [] );
135 
140  public function isError() {
141  return false;
142  }
143 
155  public function hasFile() {
156  // If TRANSFORM_LATER, $this->path will be false.
157  // Note: a null path means "use the source file".
158  return ( !$this->isError() && ( $this->path || $this->path === null ) );
159  }
160 
167  public function fileIsSource() {
168  return ( !$this->isError() && $this->path === null );
169  }
170 
177  public function getLocalCopyPath() {
178  if ( $this->isError() ) {
179  return false;
180  } elseif ( $this->path === null ) {
181  return $this->file->getLocalRefPath(); // assume thumb was not scaled
182  } elseif ( FileBackend::isStoragePath( $this->path ) ) {
183  $be = $this->file->getRepo()->getBackend();
184  // The temp file will be process cached by FileBackend
185  $fsFile = $be->getLocalReference( [ 'src' => $this->path ] );
186 
187  return $fsFile ? $fsFile->getPath() : false;
188  } else {
189  return $this->path; // may return false
190  }
191  }
192 
200  public function streamFileWithStatus( $headers = [] ) {
201  if ( !$this->path ) {
202  return Status::newFatal( 'backend-fail-stream', '<no path>' );
203  } elseif ( FileBackend::isStoragePath( $this->path ) ) {
204  $be = $this->file->getRepo()->getBackend();
205  return $be->streamFile( [ 'src' => $this->path, 'headers' => $headers ] );
206  } else { // FS-file
207  $success = StreamFile::stream( $this->getLocalCopyPath(), $headers );
208  return $success ? Status::newGood() : Status::newFatal( 'backend-fail-stream', $this->path );
209  }
210  }
211 
219  public function streamFile( $headers = [] ) {
220  $this->streamFileWithStatus( $headers )->isOK();
221  }
222 
230  protected function linkWrap( $linkAttribs, $contents ) {
231  if ( $linkAttribs ) {
232  return Xml::tags( 'a', $linkAttribs, $contents );
233  } else {
234  return $contents;
235  }
236  }
237 
243  public function getDescLinkAttribs( $title = null, $params = [] ) {
244  if ( is_array( $params ) ) {
245  $query = $params;
246  } else {
247  $query = [];
248  }
249  if ( $this->page && $this->page !== 1 ) {
250  $query['page'] = $this->page;
251  }
252  if ( $this->lang ) {
253  $query['lang'] = $this->lang;
254  }
255 
256  if ( is_string( $params ) && $params !== '' ) {
257  $query = $params . '&' . wfArrayToCgi( $query );
258  }
259 
260  $attribs = [
261  'href' => $this->file->getTitle()->getLocalURL( $query ),
262  'class' => 'image',
263  ];
264  if ( $title ) {
265  $attribs['title'] = $title;
266  }
267 
268  return $attribs;
269  }
270 }
271 
290  function __construct( $file, $url, $path = false, $parameters = [] ) {
291  # Previous parameters:
292  # $file, $url, $width, $height, $path = false, $page = false
293 
294  $defaults = [
295  'page' => false,
296  'lang' => false
297  ];
298 
299  if ( is_array( $parameters ) ) {
300  $actualParams = $parameters + $defaults;
301  } else {
302  # Using old format, should convert. Later a warning could be added here.
303  $numArgs = func_num_args();
304  $actualParams = [
305  'width' => $path,
306  'height' => $parameters,
307  'page' => ( $numArgs > 5 ) ? func_get_arg( 5 ) : false
308  ] + $defaults;
309  $path = ( $numArgs > 4 ) ? func_get_arg( 4 ) : false;
310  }
311 
312  $this->file = $file;
313  $this->url = $url;
314  $this->path = $path;
315 
316  # These should be integers when they get here.
317  # If not, there's a bug somewhere. But let's at
318  # least produce valid HTML code regardless.
319  $this->width = round( $actualParams['width'] );
320  $this->height = round( $actualParams['height'] );
321 
322  $this->page = $actualParams['page'];
323  $this->lang = $actualParams['lang'];
324  }
325 
358  function toHtml( $options = [] ) {
359  if ( count( func_get_args() ) == 2 ) {
360  throw new MWException( __METHOD__ . ' called in the old style' );
361  }
362 
363  $alt = isset( $options['alt'] ) ? $options['alt'] : '';
364 
365  $query = isset( $options['desc-query'] ) ? $options['desc-query'] : '';
366 
367  $attribs = [
368  'alt' => $alt,
369  'src' => $this->url,
370  ];
371 
372  if ( !empty( $options['custom-url-link'] ) ) {
373  $linkAttribs = [ 'href' => $options['custom-url-link'] ];
374  if ( !empty( $options['title'] ) ) {
375  $linkAttribs['title'] = $options['title'];
376  }
377  if ( !empty( $options['custom-target-link'] ) ) {
378  $linkAttribs['target'] = $options['custom-target-link'];
379  } elseif ( !empty( $options['parser-extlink-target'] ) ) {
380  $linkAttribs['target'] = $options['parser-extlink-target'];
381  }
382  if ( !empty( $options['parser-extlink-rel'] ) ) {
383  $linkAttribs['rel'] = $options['parser-extlink-rel'];
384  }
385  } elseif ( !empty( $options['custom-title-link'] ) ) {
387  $title = $options['custom-title-link'];
388  $linkAttribs = [
389  'href' => $title->getLinkURL(),
390  'title' => empty( $options['title'] ) ? $title->getFullText() : $options['title']
391  ];
392  } elseif ( !empty( $options['desc-link'] ) ) {
393  $linkAttribs = $this->getDescLinkAttribs(
394  empty( $options['title'] ) ? null : $options['title'],
395  $query
396  );
397  } elseif ( !empty( $options['file-link'] ) ) {
398  $linkAttribs = [ 'href' => $this->file->getUrl() ];
399  } else {
400  $linkAttribs = false;
401  if ( !empty( $options['title'] ) ) {
402  $attribs['title'] = $options['title'];
403  }
404  }
405 
406  if ( empty( $options['no-dimensions'] ) ) {
407  $attribs['width'] = $this->width;
408  $attribs['height'] = $this->height;
409  }
410  if ( !empty( $options['valign'] ) ) {
411  $attribs['style'] = "vertical-align: {$options['valign']}";
412  }
413  if ( !empty( $options['img-class'] ) ) {
414  $attribs['class'] = $options['img-class'];
415  }
416  if ( isset( $options['override-height'] ) ) {
417  $attribs['height'] = $options['override-height'];
418  }
419  if ( isset( $options['override-width'] ) ) {
420  $attribs['width'] = $options['override-width'];
421  }
422 
423  // Additional densities for responsive images, if specified.
424  // If any of these urls is the same as src url, it'll be excluded.
425  $responsiveUrls = array_diff( $this->responsiveUrls, [ $this->url ] );
426  if ( !empty( $responsiveUrls ) ) {
427  $attribs['srcset'] = Html::srcSet( $responsiveUrls );
428  }
429 
430  Hooks::run( 'ThumbnailBeforeProduceHTML', [ $this, &$attribs, &$linkAttribs ] );
431 
432  return $this->linkWrap( $linkAttribs, Xml::element( 'img', $attribs ) );
433  }
434 }
435 
443  private $msg;
444 
445  function __construct( $msg, $width, $height /*, ... */ ) {
446  $args = array_slice( func_get_args(), 3 );
447  $this->msg = wfMessage( $msg )->params( $args );
448  $this->width = intval( $width );
449  $this->height = intval( $height );
450  $this->url = false;
451  $this->path = false;
452  }
453 
454  function toHtml( $options = [] ) {
455  return "<div class=\"MediaTransformError\" style=\"" .
456  "width: {$this->width}px; height: {$this->height}px; display:inline-block;\">" .
457  $this->getHtmlMsg() .
458  "</div>";
459  }
460 
461  function toText() {
462  return $this->msg->text();
463  }
464 
465  function getHtmlMsg() {
466  return $this->msg->escaped();
467  }
468 
469  function getMsg() {
470  return $this->msg;
471  }
472 
473  function isError() {
474  return true;
475  }
476 
477  function getHttpStatusCode() {
478  return 500;
479  }
480 }
481 
488  function __construct( $params ) {
489  parent::__construct( 'thumbnail_error',
490  max( isset( $params['width'] ) ? $params['width'] : 0, 120 ),
491  max( isset( $params['height'] ) ? $params['height'] : 0, 120 ),
492  wfMessage( 'thumbnail_invalid_params' )
493  );
494  }
495 
496  function getHttpStatusCode() {
497  return 400;
498  }
499 }
500 
508  function __construct( $params, $maxImageArea ) {
509  $msg = wfMessage( 'thumbnail_toobigimagearea' );
510  $msg->rawParams(
511  $msg->getLanguage()->formatComputingNumbers( $maxImageArea, 1000, "size-$1pixel" )
512  );
513 
514  parent::__construct( 'thumbnail_error',
515  max( isset( $params['width'] ) ? $params['width'] : 0, 120 ),
516  max( isset( $params['height'] ) ? $params['height'] : 0, 120 ),
517  $msg
518  );
519  }
520 
521  function getHttpStatusCode() {
522  return 400;
523  }
524 }
getLocalCopyPath()
Get the path of a file system copy of the thumbnail.
__construct($file, $url, $path=false, $parameters=[])
Get a thumbnail object from a file and parameters.
null for the local wiki Added should default to null in handler for backwards compatibility add a value to it if you want to add a cookie that have to vary cache options can modify $query
Definition: hooks.txt:1623
static element($element, $attribs=null, $contents= '', $allowShortTag=true)
Format an XML element with given attributes and, optionally, text content.
Definition: Xml.php:39
hasFile()
Check if an output thumbnail file actually exists.
$success
rawParams()
Add parameters that are substituted after parsing or escaping.
Definition: Message.php:533
bool string $path
Filesystem path to the thumb.
static newFatal($message)
Factory function for fatal errors.
Definition: StatusValue.php:68
string $url
URL path to the thumb.
processing should stop and the error should be shown to the user * false
Definition: hooks.txt:187
width
getDescLinkAttribs($title=null, $params=[])
array $responsiveUrls
Associative array mapping optional supplementary image files from pixel density (eg 1...
bool string $storagePath
Permanent storage path.
target page
Base class for the output of MediaHandler::doTransform() and File::transform().
toHtml($options=[])
Fetch HTML for this transform output.
static extensionFromPath($path, $case= 'lowercase')
Get the final extension from a storage or FS path.
if($line===false) $args
Definition: cdb.php:64
Shortcut class for parameter validation errors.
streamFile($headers=[])
Stream the file if there were no errors.
toHtml($options=[])
Return HTML.
linkWrap($linkAttribs, $contents)
Wrap some XHTML text in an anchor tag with the given attributes.
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Definition: hooks.txt:91
streamFileWithStatus($headers=[])
Stream the file if there were no errors.
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isError()
This will be overridden to return true in error classes.
static isStoragePath($path)
Check if a given path is a "mwstore://" path.
Media transform output for images.
$params
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped & $options
Definition: hooks.txt:2019
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped noclasses just before the function returns a value If you return an< a > element with HTML attributes $attribs and contents $html will be returned If you return $ret will be returned and may include noclasses after processing & $attribs
Definition: hooks.txt:2019
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:941
static newGood($value=null)
Factory function for good results.
Definition: StatusValue.php:81
__construct($params, $maxImageArea)
static run($event, array $args=[], $deprecatedVersion=null)
Call hook functions defined in Hooks::register and $wgHooks.
Definition: Hooks.php:203
bool string $lang
Language code, false if not set.
getLanguage()
Returns the Language of the Message.
Definition: Message.php:378
getExtension()
Get the final extension of the thumbnail.
Shortcut class for parameter file size errors.
static srcSet(array $urls)
Generate a srcset attribute value.
Definition: Html.php:1055
static stream($fname, $headers=[], $sendErrors=true, $optHeaders=[], $flags=0)
Stream a file to the browser, adding all the headings and fun stuff.
Definition: StreamFile.php:45
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
fileIsSource()
Check if the output thumbnail is the same as the source.
static tags($element, $attribs=null, $contents)
Same as Xml::element(), but does not escape contents.
Definition: Xml.php:131
__construct($msg, $width, $height)
wfArrayToCgi($array1, $array2=null, $prefix= '')
This function takes one or two arrays as input, and returns a CGI-style string, e.g.
int $height
Image height.
Basic media transform error class.