MediaWiki  1.29.1
ResourceLoaderImageModule Class Reference

ResourceLoader module for generated and embedded images. More...

Inheritance diagram for ResourceLoaderImageModule:
Collaboration diagram for ResourceLoaderImageModule:

Public Member Functions

 __construct ( $options=[], $localBasePath=null)
 Constructs a new module from an options array. More...
 
 getDefinitionSummary (ResourceLoaderContext $context)
 Get the definition summary for this module. More...
 
 getGlobalVariants (ResourceLoaderContext $context)
 Get list of variants in this module that are 'global', i.e., available for every image regardless of image options. More...
 
 getImage ( $name, ResourceLoaderContext $context)
 Get a ResourceLoaderImage object for given image. More...
 
 getImages (ResourceLoaderContext $context)
 Get ResourceLoaderImage objects for all images. More...
 
 getPrefix ()
 Get CSS class prefix used by this module. More...
 
 getSelectors ()
 Get CSS selector templates used by this module. More...
 
 getStyles (ResourceLoaderContext $context)
 
 getType ()
 
 supportsURLLoading ()
 
- Public Member Functions inherited from ResourceLoaderModule
 enableModuleContentVersion ()
 Whether to generate version hash based on module content. More...
 
 getConfig ()
 
 getDefinitionMtime (ResourceLoaderContext $context)
 Back-compat dummy for old subclass implementations of getModifiedTime(). More...
 
 getDependencies (ResourceLoaderContext $context=null)
 Get a list of modules this module depends on. More...
 
 getFlip ( $context)
 
 getGroup ()
 Get the group this module is in. More...
 
 getHashMtime (ResourceLoaderContext $context)
 Back-compat dummy for old subclass implementations of getModifiedTime(). More...
 
 getMessages ()
 Get the messages needed for this module. More...
 
 getModifiedHash (ResourceLoaderContext $context)
 Helper method for providing a version hash to getVersionHash(). More...
 
 getModifiedTime (ResourceLoaderContext $context)
 Get this module's last modification timestamp for a given context. More...
 
 getModuleContent (ResourceLoaderContext $context)
 Get an array of this module's resources. More...
 
 getName ()
 Get this module's name. More...
 
 getOrigin ()
 Get this module's origin. More...
 
 getPosition ()
 From where in the page HTML should this module be loaded? More...
 
 getScript (ResourceLoaderContext $context)
 Get all JS for this module for a given language and skin. More...
 
 getScriptURLsForDebug (ResourceLoaderContext $context)
 Get the URL or URLs to load for this module's JS in debug mode. More...
 
 getSkipFunction ()
 Get the skip function. More...
 
 getSource ()
 Get the origin of this module. More...
 
 getStyleURLsForDebug (ResourceLoaderContext $context)
 Get the URL or URLs to load for this module's CSS in debug mode. More...
 
 getTargets ()
 Get target(s) for the module, eg ['desktop'] or ['desktop', 'mobile']. More...
 
 getTemplates ()
 Takes named templates by the module and returns an array mapping. More...
 
 getVersionHash (ResourceLoaderContext $context)
 Get a string identifying the current version of this module in a given context. More...
 
 isKnownEmpty (ResourceLoaderContext $context)
 Check whether this module is known to be empty. More...
 
 isRaw ()
 Whether this module's JS expects to work without the client-side ResourceLoader module. More...
 
 setConfig (Config $config)
 
 setFileDependencies (ResourceLoaderContext $context, $files)
 Set in-object cache for file dependencies. More...
 
 setLogger (LoggerInterface $logger)
 
 setMessageBlob ( $blob, $lang)
 Set in-object cache for message blobs. More...
 
 setName ( $name)
 Set this module's name. More...
 

Static Public Member Functions

static extractLocalBasePath ( $options, $localBasePath=null)
 Extract a local base path from module definition information. More...
 
- Static Public Member Functions inherited from ResourceLoaderModule
static expandRelativePaths (array $filePaths)
 Expand directories relative to $IP. More...
 
static getRelativePaths (array $filePaths)
 Make file paths relative to MediaWiki directory. More...
 

Protected Member Functions

 getCssDeclarations ( $primary, $fallback)
 SVG support using a transparent gradient to guarantee cross-browser compatibility (browsers able to understand gradient syntax support also SVG). More...
 
 getFileHashes (ResourceLoaderContext $context)
 Helper method for getDefinitionSummary. More...
 
 loadFromDefinition ()
 Parse definition and external JSON data, if referenced. More...
 
- Protected Member Functions inherited from ResourceLoaderModule
 buildContent (ResourceLoaderContext $context)
 Bundle all resources attached to this module into an array. More...
 
 getDeprecationInformation ()
 Get JS representing deprecation information for the current module if available. More...
 
 getFileDependencies (ResourceLoaderContext $context)
 Get the files this module depends on indirectly for a given skin. More...
 
 getLessVars (ResourceLoaderContext $context)
 Get module-specific LESS variables, if any. More...
 
 getLogger ()
 
 getMessageBlob (ResourceLoaderContext $context)
 Get the hash of the message blob. More...
 
 saveFileDependencies (ResourceLoaderContext $context, $localFileRefs)
 Set the files this module depends on indirectly for a given skin. More...
 
 validateScriptFile ( $fileName, $contents)
 Validate a given script file; if valid returns the original source. More...
 

Protected Attributes

 $definition = null
 
 $images = []
 
string $localBasePath = ''
 Local base path, see __construct() More...
 
 $origin = self::ORIGIN_CORE_SITEWIDE
 
 $prefix = null
 
 $selectorWithoutVariant = '.{prefix}-{name}'
 
 $selectorWithVariant = '.{prefix}-{name}-{variant}'
 
 $targets = [ 'desktop', 'mobile' ]
 
 $variants = []
 
- Protected Attributes inherited from ResourceLoaderModule
Config $config
 
 $contents = []
 
array bool $deprecated = false
 
 $fileDeps = []
 
LoggerInterface $logger
 
 $msgBlobs = []
 
 $name = null
 
 $origin = self::ORIGIN_CORE_SITEWIDE
 
 $targets = [ 'desktop' ]
 
 $versionHash = []
 

Private Member Functions

 getStyleDeclarations (ResourceLoaderContext $context, ResourceLoaderImage $image, $script, $variant=null)
 

Additional Inherited Members

- Public Attributes inherited from ResourceLoaderModule
const LOAD_GENERAL = 'general'
 
const LOAD_STYLES = 'styles'
 
const ORIGIN_ALL = 10
 
const ORIGIN_CORE_INDIVIDUAL = 2
 
const ORIGIN_CORE_SITEWIDE = 1
 
const ORIGIN_USER_INDIVIDUAL = 4
 
const ORIGIN_USER_SITEWIDE = 3
 
const TYPE_COMBINED = 'combined'
 
const TYPE_SCRIPTS = 'scripts'
 
const TYPE_STYLES = 'styles'
 
- Static Protected Member Functions inherited from ResourceLoaderModule
static javaScriptParser ()
 
static safeFileHash ( $filePath)
 Compute a non-cryptographic string hash of a file's contents. More...
 
static safeFilemtime ( $filePath)
 Safe version of filemtime(), which doesn't throw a PHP warning if the file doesn't exist. More...
 

Detailed Description

ResourceLoader module for generated and embedded images.

Since
1.25

Definition at line 29 of file ResourceLoaderImageModule.php.

Constructor & Destructor Documentation

◆ __construct()

ResourceLoaderImageModule::__construct (   $options = [],
  $localBasePath = null 
)

Constructs a new module from an options array.

Parameters
array$optionsList of options; if not given or empty, an empty module will be constructed
string$localBasePathBase path to prepend to all local paths in $options. Defaults to $IP

Below is a description for the $options array:

Construction options:
[
// Base path to prepend to all local paths in $options. Defaults to $IP
'localBasePath' => [base path],
// Path to JSON file that contains any of the settings below
'data' => [file path string]
// CSS class prefix to use in all style rules
'prefix' => [CSS class prefix],
// Alternatively: Format of CSS selector to use in all style rules
'selector' => [CSS selector template, variables: {prefix} {name} {variant}],
// Alternatively: When using variants
'selectorWithoutVariant' => [CSS selector template, variables: {prefix} {name}],
'selectorWithVariant' => [CSS selector template, variables: {prefix} {name} {variant}],
// List of variants that may be used for the image files
'variants' => [
// This level of nesting can be omitted if you use the same images for every skin
[skin name (or 'default')] => [
[variant name] => [
'color' => [color string, e.g. '#ffff00'],
'global' => [boolean, if true, this variant is available
for all images of this type],
],
...
],
...
],
// List of image files and their options
'images' => [
// This level of nesting can be omitted if you use the same images for every skin
[skin name (or 'default')] => [
[icon name] => [
'file' => [file path string or array whose values are file path strings
and whose keys are 'default', 'ltr', 'rtl', a single
'en,de,ar'],
'variants' => [array of variant name strings, variants
available for this image],
],
...
],
...
],
]
Exceptions
InvalidArgumentException

Definition at line 104 of file ResourceLoaderImageModule.php.

References $localBasePath, $options, definition, and extractLocalBasePath().

Member Function Documentation

◆ extractLocalBasePath()

static ResourceLoaderImageModule::extractLocalBasePath (   $options,
  $localBasePath = null 
)
static

Extract a local base path from module definition information.

Parameters
array$optionsModule definition
string$localBasePathPath to use if not provided in module definition. Defaults to $IP
Returns
string Local base path

Definition at line 449 of file ResourceLoaderImageModule.php.

References $IP, $localBasePath, $options, global, and string.

Referenced by __construct().

◆ getCssDeclarations()

ResourceLoaderImageModule::getCssDeclarations (   $primary,
  $fallback 
)
protected

SVG support using a transparent gradient to guarantee cross-browser compatibility (browsers able to understand gradient syntax support also SVG).

http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique

Keep synchronized with the .background-image-svg LESS mixin in /resources/src/mediawiki.less/mediawiki.mixins.less.

Parameters
string$primaryPrimary URI
string$fallbackFallback URI
Returns
string[] CSS declarations to use given URIs as background-image

Reimplemented in ResourceLoaderImageModuleTestable.

Definition at line 383 of file ResourceLoaderImageModule.php.

Referenced by getStyleDeclarations().

◆ getDefinitionSummary()

ResourceLoaderImageModule::getDefinitionSummary ( ResourceLoaderContext  $context)

Get the definition summary for this module.

Parameters
ResourceLoaderContext$context
Returns
array

Reimplemented from ResourceLoaderModule.

Definition at line 405 of file ResourceLoaderImageModule.php.

References $context, $options, as, getFileHashes(), and loadFromDefinition().

◆ getFileHashes()

ResourceLoaderImageModule::getFileHashes ( ResourceLoaderContext  $context)
protected

Helper method for getDefinitionSummary.

Definition at line 431 of file ResourceLoaderImageModule.php.

References $context, $image, ResourceLoaderModule\$name, as, getImages(), and loadFromDefinition().

Referenced by getDefinitionSummary().

◆ getGlobalVariants()

ResourceLoaderImageModule::getGlobalVariants ( ResourceLoaderContext  $context)

Get list of variants in this module that are 'global', i.e., available for every image regardless of image options.

Parameters
ResourceLoaderContext$context
Returns
string[]

Definition at line 284 of file ResourceLoaderImageModule.php.

References ResourceLoaderModule\$config, $context, ResourceLoaderModule\$name, $skin, as, ContextSource\getSkin(), and loadFromDefinition().

Referenced by getImages().

◆ getImage()

ResourceLoaderImageModule::getImage (   $name,
ResourceLoaderContext  $context 
)

Get a ResourceLoaderImage object for given image.

Parameters
string$nameImage name
ResourceLoaderContext$context
Returns
ResourceLoaderImage|null

Definition at line 224 of file ResourceLoaderImageModule.php.

References $images, ResourceLoaderModule\$name, getImages(), and loadFromDefinition().

◆ getImages()

ResourceLoaderImageModule::getImages ( ResourceLoaderContext  $context)

◆ getPrefix()

ResourceLoaderImageModule::getPrefix ( )

Get CSS class prefix used by this module.

Returns
string

Definition at line 201 of file ResourceLoaderImageModule.php.

References $prefix, and loadFromDefinition().

Referenced by getStyles().

◆ getSelectors()

ResourceLoaderImageModule::getSelectors ( )

Get CSS selector templates used by this module.

Returns
string

Definition at line 210 of file ResourceLoaderImageModule.php.

References $selectorWithoutVariant, $selectorWithVariant, and loadFromDefinition().

Referenced by getStyles().

◆ getStyleDeclarations()

ResourceLoaderImageModule::getStyleDeclarations ( ResourceLoaderContext  $context,
ResourceLoaderImage  $image,
  $script,
  $variant = null 
)
private
Parameters
ResourceLoaderContext$context
ResourceLoaderImage$imageImage to get the style for
string$scriptURL to load.php
string | null$variantVariant to get the style for
Returns
string

Definition at line 356 of file ResourceLoaderImageModule.php.

References $context, $image, and getCssDeclarations().

Referenced by getStyles().

◆ getStyles()

ResourceLoaderImageModule::getStyles ( ResourceLoaderContext  $context)

◆ getType()

ResourceLoaderImageModule::getType ( )
Returns
string

Reimplemented from ResourceLoaderModule.

Definition at line 466 of file ResourceLoaderImageModule.php.

References ResourceLoaderModule\LOAD_STYLES.

◆ loadFromDefinition()

ResourceLoaderImageModule::loadFromDefinition ( )
protected

◆ supportsURLLoading()

ResourceLoaderImageModule::supportsURLLoading ( )
Returns
bool

Reimplemented from ResourceLoaderModule.

Definition at line 395 of file ResourceLoaderImageModule.php.

Member Data Documentation

◆ $definition

ResourceLoaderImageModule::$definition = null
protected

◆ $images

ResourceLoaderImageModule::$images = []
protected

Definition at line 41 of file ResourceLoaderImageModule.php.

Referenced by getImage().

◆ $localBasePath

string ResourceLoaderImageModule::$localBasePath = ''
protected

Local base path, see __construct()

Definition at line 37 of file ResourceLoaderImageModule.php.

Referenced by __construct(), and extractLocalBasePath().

◆ $origin

ResourceLoaderImageModule::$origin = self::ORIGIN_CORE_SITEWIDE
protected

Definition at line 39 of file ResourceLoaderImageModule.php.

◆ $prefix

ResourceLoaderImageModule::$prefix = null
protected

Definition at line 43 of file ResourceLoaderImageModule.php.

Referenced by getPrefix(), and loadFromDefinition().

◆ $selectorWithoutVariant

ResourceLoaderImageModule::$selectorWithoutVariant = '.{prefix}-{name}'
protected

Definition at line 44 of file ResourceLoaderImageModule.php.

Referenced by getSelectors(), and loadFromDefinition().

◆ $selectorWithVariant

ResourceLoaderImageModule::$selectorWithVariant = '.{prefix}-{name}-{variant}'
protected

Definition at line 45 of file ResourceLoaderImageModule.php.

Referenced by getSelectors(), and loadFromDefinition().

◆ $targets

ResourceLoaderImageModule::$targets = [ 'desktop', 'mobile' ]
protected

Definition at line 46 of file ResourceLoaderImageModule.php.

◆ $variants

ResourceLoaderImageModule::$variants = []
protected

Definition at line 42 of file ResourceLoaderImageModule.php.


The documentation for this class was generated from the following file:
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Definition: design.txt:93
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Definition: hooks.txt:93
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We use the convention $dbr for read and $dbw for write to help you keep track of whether the database object is a the world will explode Or to be a subsequent write query which succeeded on the master may fail when replicated to the slave due to a unique key collision Replication on the slave will stop and it may take hours to repair the database and get it back online Setting read_only in my cnf on the slave will avoid this but given the dire we prefer to have as many checks as possible We provide a but the wrapper functions like please read the documentation for except in special pages derived from QueryPage It s a common pitfall for new developers to submit code containing SQL queries which examine huge numbers of rows Remember that COUNT * is(N), counting rows in atable is like counting beans in a bucket.------------------------------------------------------------------------ Replication------------------------------------------------------------------------The largest installation of MediaWiki, Wikimedia, uses a large set ofslave MySQL servers replicating writes made to a master MySQL server. Itis important to understand the issues associated with this setup if youwant to write code destined for Wikipedia.It 's often the case that the best algorithm to use for a given taskdepends on whether or not replication is in use. Due to our unabashedWikipedia-centrism, we often just use the replication-friendly version, but if you like, you can use wfGetLB() ->getServerCount() > 1 tocheck to see if replication is in use.===Lag===Lag primarily occurs when large write queries are sent to the master.Writes on the master are executed in parallel, but they are executed inserial when they are replicated to the slaves. The master writes thequery to the binlog when the transaction is committed. The slaves pollthe binlog and start executing the query as soon as it appears. They canservice reads while they are performing a write query, but will not readanything more from the binlog and thus will perform no more writes. Thismeans that if the write query runs for a long time, the slaves will lagbehind the master for the time it takes for the write query to complete.Lag can be exacerbated by high read load. MediaWiki 's load balancer willstop sending reads to a slave when it is lagged by more than 30 seconds.If the load ratios are set incorrectly, or if there is too much loadgenerally, this may lead to a slave permanently hovering around 30seconds lag.If all slaves are lagged by more than 30 seconds, MediaWiki will stopwriting to the database. All edits and other write operations will berefused, with an error returned to the user. This gives the slaves achance to catch up. Before we had this mechanism, the slaves wouldregularly lag by several minutes, making review of recent editsdifficult.In addition to this, MediaWiki attempts to ensure that the user seesevents occurring on the wiki in chronological order. A few seconds of lagcan be tolerated, as long as the user sees a consistent picture fromsubsequent requests. This is done by saving the master binlog positionin the session, and then at the start of each request, waiting for theslave to catch up to that position before doing any reads from it. Ifthis wait times out, reads are allowed anyway, but the request isconsidered to be in "lagged slave mode". Lagged slave mode can bechecked by calling wfGetLB() ->getLaggedSlaveMode(). The onlypractical consequence at present is a warning displayed in the pagefooter.===Lag avoidance===To avoid excessive lag, queries which write large numbers of rows shouldbe split up, generally to write one row at a time. Multi-row INSERT ...SELECT queries are the worst offenders should be avoided altogether.Instead do the select first and then the insert.===Working with lag===Despite our best efforts, it 's not practical to guarantee a low-lagenvironment. Lag will usually be less than one second, but mayoccasionally be up to 30 seconds. For scalability, it 's very importantto keep load on the master low, so simply sending all your queries tothe master is not the answer. So when you have a genuine need forup-to-date data, the following approach is advised:1) Do a quick query to the master for a sequence number or timestamp 2) Run the full query on the slave and check if it matches the data you gotfrom the master 3) If it doesn 't, run the full query on the masterTo avoid swamping the master every time the slaves lag, use of thisapproach should be kept to a minimum. In most cases you should just readfrom the slave and let the user deal with the delay.------------------------------------------------------------------------ Lock contention------------------------------------------------------------------------Due to the high write rate on Wikipedia(and some other wikis), MediaWiki developers need to be very careful to structure their writesto avoid long-lasting locks. By default, MediaWiki opens a transactionat the first query, and commits it before the output is sent. Locks willbe held from the time when the query is done until the commit. So youcan reduce lock time by doing as much processing as possible before youdo your write queries.Often this approach is not good enough, and it becomes necessary toenclose small groups of queries in their own transaction. Use thefollowing syntax:$dbw=wfGetDB(DB_MASTER
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Definition: parserTests.txt:89
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Definition: hooks.txt:23
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Definition: hooks.txt:177
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Definition: deferred.txt:11
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Definition: COPYING.txt:140
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Definition: hooks.txt:1398
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Definition: database.txt:26
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Definition: postgres.txt:22
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Definition: hooks.txt:177
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Definition: All_system_messages.txt:425
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Definition: globals.txt:10
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Definition: design.txt:12
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