MediaWiki REL1_28
ImageHandler.php
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1<?php
29abstract class ImageHandler extends MediaHandler {
34 public function canRender( $file ) {
35 return ( $file->getWidth() && $file->getHeight() );
36 }
37
38 public function getParamMap() {
39 return [ 'img_width' => 'width' ];
40 }
41
42 public function validateParam( $name, $value ) {
43 if ( in_array( $name, [ 'width', 'height' ] ) ) {
44 if ( $value <= 0 ) {
45 return false;
46 } else {
47 return true;
48 }
49 } else {
50 return false;
51 }
52 }
53
54 public function makeParamString( $params ) {
55 if ( isset( $params['physicalWidth'] ) ) {
56 $width = $params['physicalWidth'];
57 } elseif ( isset( $params['width'] ) ) {
58 $width = $params['width'];
59 } else {
60 throw new MediaTransformInvalidParametersException( 'No width specified to ' . __METHOD__ );
61 }
62
63 # Removed for ProofreadPage
64 # $width = intval( $width );
65 return "{$width}px";
66 }
67
68 public function parseParamString( $str ) {
69 $m = false;
70 if ( preg_match( '/^(\d+)px$/', $str, $m ) ) {
71 return [ 'width' => $m[1] ];
72 } else {
73 return false;
74 }
75 }
76
78 return [ 'width' => $params['width'] ];
79 }
80
87 $mimeType = $image->getMimeType();
88
89 if ( !isset( $params['width'] ) ) {
90 return false;
91 }
92
93 if ( !isset( $params['page'] ) ) {
94 $params['page'] = 1;
95 } else {
96 $params['page'] = intval( $params['page'] );
97 if ( $params['page'] > $image->pageCount() ) {
98 $params['page'] = $image->pageCount();
99 }
100
101 if ( $params['page'] < 1 ) {
102 $params['page'] = 1;
103 }
104 }
105
106 $srcWidth = $image->getWidth( $params['page'] );
107 $srcHeight = $image->getHeight( $params['page'] );
108
109 if ( isset( $params['height'] ) && $params['height'] != -1 ) {
110 # Height & width were both set
111 if ( $params['width'] * $srcHeight > $params['height'] * $srcWidth ) {
112 # Height is the relative smaller dimension, so scale width accordingly
113 $params['width'] = self::fitBoxWidth( $srcWidth, $srcHeight, $params['height'] );
114
115 if ( $params['width'] == 0 ) {
116 # Very small image, so we need to rely on client side scaling :(
117 $params['width'] = 1;
118 }
119
120 $params['physicalWidth'] = $params['width'];
121 } else {
122 # Height was crap, unset it so that it will be calculated later
123 unset( $params['height'] );
124 }
125 }
126
127 if ( !isset( $params['physicalWidth'] ) ) {
128 # Passed all validations, so set the physicalWidth
129 $params['physicalWidth'] = $params['width'];
130 }
131
132 # Because thumbs are only referred to by width, the height always needs
133 # to be scaled by the width to keep the thumbnail sizes consistent,
134 # even if it was set inside the if block above
135 $params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight,
136 $params['physicalWidth'] );
137
138 # Set the height if it was not validated in the if block higher up
139 if ( !isset( $params['height'] ) || $params['height'] == -1 ) {
140 $params['height'] = $params['physicalHeight'];
141 }
142
143 if ( !$this->validateThumbParams( $params['physicalWidth'],
144 $params['physicalHeight'], $srcWidth, $srcHeight, $mimeType )
145 ) {
146 return false;
147 }
148
149 return true;
150 }
151
162 function validateThumbParams( &$width, &$height, $srcWidth, $srcHeight, $mimeType ) {
163 $width = intval( $width );
164
165 # Sanity check $width
166 if ( $width <= 0 ) {
167 wfDebug( __METHOD__ . ": Invalid destination width: $width\n" );
168
169 return false;
170 }
171 if ( $srcWidth <= 0 ) {
172 wfDebug( __METHOD__ . ": Invalid source width: $srcWidth\n" );
173
174 return false;
175 }
176
177 $height = File::scaleHeight( $srcWidth, $srcHeight, $width );
178 if ( $height == 0 ) {
179 # Force height to be at least 1 pixel
180 $height = 1;
181 }
182
183 return true;
184 }
185
192 function getScriptedTransform( $image, $script, $params ) {
193 if ( !$this->normaliseParams( $image, $params ) ) {
194 return false;
195 }
196 $url = wfAppendQuery( $script, $this->getScriptParams( $params ) );
197
198 if ( $image->mustRender() || $params['width'] < $image->getWidth() ) {
199 return new ThumbnailImage( $image, $url, false, $params );
200 }
201 }
202
203 function getImageSize( $image, $path ) {
204 MediaWiki\suppressWarnings();
205 $gis = getimagesize( $path );
206 MediaWiki\restoreWarnings();
207
208 return $gis;
209 }
210
220 function getImageArea( $image ) {
221 return $image->getWidth() * $image->getHeight();
222 }
223
228 function getShortDesc( $file ) {
230 $nbytes = htmlspecialchars( $wgLang->formatSize( $file->getSize() ) );
231 $widthheight = wfMessage( 'widthheight' )
232 ->numParams( $file->getWidth(), $file->getHeight() )->escaped();
233
234 return "$widthheight ($nbytes)";
235 }
236
241 function getLongDesc( $file ) {
243 $pages = $file->pageCount();
244 $size = htmlspecialchars( $wgLang->formatSize( $file->getSize() ) );
245 if ( $pages === false || $pages <= 1 ) {
246 $msg = wfMessage( 'file-info-size' )->numParams( $file->getWidth(),
247 $file->getHeight() )->params( $size,
248 '<span class="mime-type">' . $file->getMimeType() . '</span>' )->parse();
249 } else {
250 $msg = wfMessage( 'file-info-size-pages' )->numParams( $file->getWidth(),
251 $file->getHeight() )->params( $size,
252 '<span class="mime-type">' . $file->getMimeType() . '</span>' )->numParams( $pages )->parse();
253 }
254
255 return $msg;
256 }
257
262 function getDimensionsString( $file ) {
263 $pages = $file->pageCount();
264 if ( $pages > 1 ) {
265 return wfMessage( 'widthheightpage' )
266 ->numParams( $file->getWidth(), $file->getHeight(), $pages )->text();
267 } else {
268 return wfMessage( 'widthheight' )
269 ->numParams( $file->getWidth(), $file->getHeight() )->text();
270 }
271 }
272
274 $params = parent::sanitizeParamsForBucketing( $params );
275
276 // We unset the height parameters in order to let normaliseParams recalculate them
277 // Otherwise there might be a height discrepancy
278 if ( isset( $params['height'] ) ) {
279 unset( $params['height'] );
280 }
281
282 if ( isset( $params['physicalHeight'] ) ) {
283 unset( $params['physicalHeight'] );
284 }
285
286 return $params;
287 }
288}
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
wfAppendQuery( $url, $query)
Append a query string to an existing URL, which may or may not already have query string parameters a...
static scaleHeight( $srcWidth, $srcHeight, $dstWidth)
Calculate the height of a thumbnail using the source and destination width.
Definition File.php:1989
Media handler abstract base class for images.
canRender( $file)
getImageSize( $image, $path)
Get an image size array like that returned by getimagesize(), or false if it can't be determined.
sanitizeParamsForBucketing( $params)
Returns a normalised params array for which parameters have been cleaned up for bucketing purposes.
getImageArea( $image)
Function that returns the number of pixels to be thumbnailed.
validateThumbParams(&$width, &$height, $srcWidth, $srcHeight, $mimeType)
Validate thumbnail parameters and fill in the correct height.
getParamMap()
Get an associative array mapping magic word IDs to parameter names.
normaliseParams( $image, &$params)
parseParamString( $str)
Parse a param string made with makeParamString back into an array.
makeParamString( $params)
Merge a parameter array into a string appropriate for inclusion in filenames.
getLongDesc( $file)
validateParam( $name, $value)
Validate a thumbnail parameter at parse time.
getScriptedTransform( $image, $script, $params)
getScriptParams( $params)
getDimensionsString( $file)
getShortDesc( $file)
Base media handler class.
static fitBoxWidth( $boxWidth, $boxHeight, $maxHeight)
Calculate the largest thumbnail width for a given original file size such that the thumbnail's height...
MediaWiki exception thrown by some methods when the transform parameter array is invalid.
Media transform output for images.
when a variable name is used in a it is silently declared as a new local masking the global
Definition design.txt:95
this class mediates it Skin Encapsulates a look and feel for the wiki All of the functions that render HTML and make choices about how to render it are here and are called from various other places when and is meant to be subclassed with other skins that may override some of its functions The User object contains a reference to a and so rather than having a global skin object we just rely on the global User and get the skin with $wgUser and also has some character encoding functions and other locale stuff The current user interface language is instantiated as $wgLang
Definition design.txt:56
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that probably a stub it is not rendered in wiki pages or galleries in category pages allow injecting custom HTML after the section Any uses of the hook need to handle escaping see BaseTemplate::getToolbox and BaseTemplate::makeListItem for details on the format of individual items inside of this array or by returning and letting standard HTTP rendering take place modifiable or by returning false and taking over the output modifiable modifiable after all normalizations have been except for the $wgMaxImageArea check $image
Definition hooks.txt:917
either a unescaped string or a HtmlArmor object after in associative array form externallinks including delete and has completed for all link tables whether this was an auto creation default is conds Array Extra conditions for the No matching items in log is displayed if loglist is empty msgKey Array If you want a nice box with a set this to the key of the message First element is the message additional optional elements are parameters for the key that are processed with wfMessage() -> params() ->parseAsBlock() - offset Set to overwrite offset parameter in $wgRequest set to '' to unset offset - wrap String Wrap the message in html(usually something like "&lt;div ...>$1&lt;/div>"). - flags Integer display flags(NO_ACTION_LINK, NO_EXTRA_USER_LINKS) 'LogException':Called before an exception(or PHP error) is logged. This is meant for integration with external error aggregation services
Allows to change the fields on the form that will be generated $name
Definition hooks.txt:304
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:37
$params