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<?php
/**
* ResourceLoader module based on local JavaScript/CSS files.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @author Trevor Parscal
* @author Roan Kattouw
*/
/**
* ResourceLoader module based on local JavaScript/CSS files.
*/
class ResourceLoaderFileModule extends ResourceLoaderModule {
/* Protected Members */
/** @var string Local base path, see __construct() */
protected $localBasePath = '';
/** @var string Remote base path, see __construct() */
protected $remoteBasePath = '';
/** @var array Saves a list of the templates named by the modules. */
protected $templates = [];
/**
* @var array List of paths to JavaScript files to always include
* @par Usage:
* @code
* array( [file-path], [file-path], ... )
* @endcode
*/
protected $scripts = [];
/**
* @var array List of JavaScript files to include when using a specific language
* @par Usage:
* @code
* array( [language-code] => array( [file-path], [file-path], ... ), ... )
* @endcode
*/
protected $languageScripts = [];
/**
* @var array List of JavaScript files to include when using a specific skin
* @par Usage:
* @code
* array( [skin-name] => array( [file-path], [file-path], ... ), ... )
* @endcode
*/
protected $skinScripts = [];
/**
* @var array List of paths to JavaScript files to include in debug mode
* @par Usage:
* @code
* array( [skin-name] => array( [file-path], [file-path], ... ), ... )
* @endcode
*/
protected $debugScripts = [];
/**
* @var array List of paths to CSS files to always include
* @par Usage:
* @code
* array( [file-path], [file-path], ... )
* @endcode
*/
protected $styles = [];
/**
* @var array List of paths to CSS files to include when using specific skins
* @par Usage:
* @code
* array( [file-path], [file-path], ... )
* @endcode
*/
protected $skinStyles = [];
/**
* @var array List of modules this module depends on
* @par Usage:
* @code
* array( [file-path], [file-path], ... )
* @endcode
*/
protected $dependencies = [];
/**
* @var string File name containing the body of the skip function
*/
protected $skipFunction = null;
/**
* @var array List of message keys used by this module
* @par Usage:
* @code
* array( [message-key], [message-key], ... )
* @endcode
*/
protected $messages = [];
/** @var string Name of group to load this module in */
protected $group;
/** @var string Position on the page to load this module at */
protected $position = 'bottom';
/** @var bool Link to raw files in debug mode */
protected $debugRaw = true;
/** @var bool Whether mw.loader.state() call should be omitted */
protected $raw = false;
protected $targets = [ 'desktop' ];
/**
* @var bool Whether getStyleURLsForDebug should return raw file paths,
* or return load.php urls
*/
protected $hasGeneratedStyles = false;
/**
* @var array Place where readStyleFile() tracks file dependencies
* @par Usage:
* @code
* array( [file-path], [file-path], ... )
* @endcode
*/
protected $localFileRefs = [];
/**
* @var array Place where readStyleFile() tracks file dependencies for non-existent files.
* Used in tests to detect missing dependencies.
*/
protected $missingLocalFileRefs = [];
/* Methods */
/**
* Constructs a new module from an options array.
*
* @param array $options List of options; if not given or empty, an empty module will be
* constructed
* @param string $localBasePath Base path to prepend to all local paths in $options. Defaults
* to $IP
* @param string $remoteBasePath Base path to prepend to all remote paths in $options. Defaults
* to $wgResourceBasePath
*
* Below is a description for the $options array:
* @throws InvalidArgumentException
* @par Construction options:
* @code
* array(
* // Base path to prepend to all local paths in $options. Defaults to $IP
* 'localBasePath' => [base path],
* // Base path to prepend to all remote paths in $options. Defaults to $wgResourceBasePath
* 'remoteBasePath' => [base path],
* // Equivalent of remoteBasePath, but relative to $wgExtensionAssetsPath
* 'remoteExtPath' => [base path],
* // Equivalent of remoteBasePath, but relative to $wgStylePath
* 'remoteSkinPath' => [base path],
* // Scripts to always include
* 'scripts' => [file path string or array of file path strings],
* // Scripts to include in specific language contexts
* 'languageScripts' => array(
* [language code] => [file path string or array of file path strings],
* ),
* // Scripts to include in specific skin contexts
* 'skinScripts' => array(
* [skin name] => [file path string or array of file path strings],
* ),
* // Scripts to include in debug contexts
* 'debugScripts' => [file path string or array of file path strings],
* // Modules which must be loaded before this module
* 'dependencies' => [module name string or array of module name strings],
* 'templates' => array(
* [template alias with file.ext] => [file path to a template file],
* ),
* // Styles to always load
* 'styles' => [file path string or array of file path strings],
* // Styles to include in specific skin contexts
* 'skinStyles' => array(
* [skin name] => [file path string or array of file path strings],
* ),
* // Messages to always load
* 'messages' => [array of message key strings],
* // Group which this module should be loaded together with
* 'group' => [group name string],
* // Position on the page to load this module at
* 'position' => ['bottom' (default) or 'top']
* // Function that, if it returns true, makes the loader skip this module.
* // The file must contain valid JavaScript for execution in a private function.
* // The file must not contain the "function () {" and "}" wrapper though.
* 'skipFunction' => [file path]
* )
* @endcode
*/
public function __construct(
$options = [],
$localBasePath = null,
$remoteBasePath = null
) {
// Flag to decide whether to automagically add the mediawiki.template module
$hasTemplates = false;
// localBasePath and remoteBasePath both have unbelievably long fallback chains
// and need to be handled separately.
list( $this->localBasePath, $this->remoteBasePath ) =
self::extractBasePaths( $options, $localBasePath, $remoteBasePath );
// Extract, validate and normalise remaining options
foreach ( $options as $member => $option ) {
switch ( $member ) {
// Lists of file paths
case 'scripts':
case 'debugScripts':
case 'styles':
$this->{$member} = (array)$option;
break;
case 'templates':
$hasTemplates = true;
$this->{$member} = (array)$option;
break;
// Collated lists of file paths
case 'languageScripts':
case 'skinScripts':
case 'skinStyles':
if ( !is_array( $option ) ) {
throw new InvalidArgumentException(
"Invalid collated file path list error. " .
"'$option' given, array expected."
);
}
foreach ( $option as $key => $value ) {
if ( !is_string( $key ) ) {
throw new InvalidArgumentException(
"Invalid collated file path list key error. " .
"'$key' given, string expected."
);
}
$this->{$member}[$key] = (array)$value;
}
break;
// Lists of strings
case 'dependencies':
case 'messages':
case 'targets':
// Normalise
$option = array_values( array_unique( (array)$option ) );
sort( $option );
$this->{$member} = $option;
break;
// Single strings
case 'position':
case 'group':
case 'skipFunction':
$this->{$member} = (string)$option;
break;
// Single booleans
case 'debugRaw':
case 'raw':
$this->{$member} = (bool)$option;
break;
}
}
if ( $hasTemplates ) {
$this->dependencies[] = 'mediawiki.template';
// Ensure relevant template compiler module gets loaded
foreach ( $this->templates as $alias => $templatePath ) {
if ( is_int( $alias ) ) {
$alias = $templatePath;
}
$suffix = explode( '.', $alias );
$suffix = end( $suffix );
$compilerModule = 'mediawiki.template.' . $suffix;
if ( $suffix !== 'html' && !in_array( $compilerModule, $this->dependencies ) ) {
$this->dependencies[] = $compilerModule;
}
}
}
}
/**
* Extract a pair of local and remote base paths from module definition information.
* Implementation note: the amount of global state used in this function is staggering.
*
* @param array $options Module definition
* @param string $localBasePath Path to use if not provided in module definition. Defaults
* to $IP
* @param string $remoteBasePath Path to use if not provided in module definition. Defaults
* to $wgResourceBasePath
* @return array Array( localBasePath, remoteBasePath )
*/
public static function extractBasePaths(
$options = [],
$localBasePath = null,
$remoteBasePath = null
) {
global $IP, $wgResourceBasePath;
// The different ways these checks are done, and their ordering, look very silly,
// but were preserved for backwards-compatibility just in case. Tread lightly.
if ( $localBasePath === null ) {
$localBasePath = $IP;
}
if ( $remoteBasePath === null ) {
$remoteBasePath = $wgResourceBasePath;
}
if ( isset( $options['remoteExtPath'] ) ) {
global $wgExtensionAssetsPath;
$remoteBasePath = $wgExtensionAssetsPath . '/' . $options['remoteExtPath'];
}
if ( isset( $options['remoteSkinPath'] ) ) {
global $wgStylePath;
$remoteBasePath = $wgStylePath . '/' . $options['remoteSkinPath'];
}
if ( array_key_exists( 'localBasePath', $options ) ) {
$localBasePath = (string)$options['localBasePath'];
}
if ( array_key_exists( 'remoteBasePath', $options ) ) {
$remoteBasePath = (string)$options['remoteBasePath'];
}
return [ $localBasePath, $remoteBasePath ];
}
/**
* Gets all scripts for a given context concatenated together.
*
* @param ResourceLoaderContext $context Context in which to generate script
* @return string JavaScript code for $context
*/
public function getScript( ResourceLoaderContext $context ) {
$files = $this->getScriptFiles( $context );
return $this->readScriptFiles( $files );
}
/**
* @param ResourceLoaderContext $context
* @return array
*/
public function getScriptURLsForDebug( ResourceLoaderContext $context ) {
$urls = [];
foreach ( $this->getScriptFiles( $context ) as $file ) {
$urls[] = OutputPage::transformResourcePath(
$this->getConfig(),
$this->getRemotePath( $file )
);
}
return $urls;
}
/**
* @return bool
*/
public function supportsURLLoading() {
return $this->debugRaw;
}
/**
* Get all styles for a given context.
*
* @param ResourceLoaderContext $context
* @return array CSS code for $context as an associative array mapping media type to CSS text.
*/
public function getStyles( ResourceLoaderContext $context ) {
$styles = $this->readStyleFiles(
$this->getStyleFiles( $context ),
$this->getFlip( $context ),
$context
);
// Collect referenced files
$this->saveFileDependencies( $context, $this->localFileRefs );
return $styles;
}
/**
* @param ResourceLoaderContext $context
* @return array
*/
public function getStyleURLsForDebug( ResourceLoaderContext $context ) {
if ( $this->hasGeneratedStyles ) {
// Do the default behaviour of returning a url back to load.php
// but with only=styles.
return parent::getStyleURLsForDebug( $context );
}
// Our module consists entirely of real css files,
// in debug mode we can load those directly.
$urls = [];
foreach ( $this->getStyleFiles( $context ) as $mediaType => $list ) {
$urls[$mediaType] = [];
foreach ( $list as $file ) {
$urls[$mediaType][] = OutputPage::transformResourcePath(
$this->getConfig(),
$this->getRemotePath( $file )
);
}
}
return $urls;
}
/**
* Gets list of message keys used by this module.
*
* @return array List of message keys
*/
public function getMessages() {
return $this->messages;
}
/**
* Gets the name of the group this module should be loaded in.
*
* @return string Group name
*/
public function getGroup() {
return $this->group;
}
/**
* @return string
*/
public function getPosition() {
return $this->position;
}
/**
* Gets list of names of modules this module depends on.
* @param ResourceLoaderContext|null $context
* @return array List of module names
*/
public function getDependencies( ResourceLoaderContext $context = null ) {
return $this->dependencies;
}
/**
* Get the skip function.
* @return null|string
* @throws MWException
*/
public function getSkipFunction() {
if ( !$this->skipFunction ) {
return null;
}
$localPath = $this->getLocalPath( $this->skipFunction );
if ( !file_exists( $localPath ) ) {
throw new MWException( __METHOD__ . ": skip function file not found: \"$localPath\"" );
}
$contents = $this->stripBom( file_get_contents( $localPath ) );
if ( $this->getConfig()->get( 'ResourceLoaderValidateStaticJS' ) ) {
$contents = $this->validateScriptFile( $localPath, $contents );
}
return $contents;
}
/**
* @return bool
*/
public function isRaw() {
return $this->raw;
}
/**
* Disable module content versioning.
*
* This class uses getDefinitionSummary() instead, to avoid filesystem overhead
* involved with building the full module content inside a startup request.
*
* @return bool
*/
public function enableModuleContentVersion() {
return false;
}
/**
* Helper method to gather file hashes for getDefinitionSummary.
*
* This function is context-sensitive, only computing hashes of files relevant to the
* given language, skin, etc.
*
* @see ResourceLoaderModule::getFileDependencies
* @param ResourceLoaderContext $context
* @return array
*/
protected function getFileHashes( ResourceLoaderContext $context ) {
$files = [];
// Flatten style files into $files
$styles = self::collateFilePathListByOption( $this->styles, 'media', 'all' );
foreach ( $styles as $styleFiles ) {
$files = array_merge( $files, $styleFiles );
}
$skinFiles = self::collateFilePathListByOption(
self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
'media',
'all'
);
foreach ( $skinFiles as $styleFiles ) {
$files = array_merge( $files, $styleFiles );
}
// Final merge, this should result in a master list of dependent files
$files = array_merge(
$files,
$this->scripts,
$this->templates,
$context->getDebug() ? $this->debugScripts : [],
$this->getLanguageScripts( $context->getLanguage() ),
self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' )
);
if ( $this->skipFunction ) {
$files[] = $this->skipFunction;
}
$files = array_map( [ $this, 'getLocalPath' ], $files );
// File deps need to be treated separately because they're already prefixed
$files = array_merge( $files, $this->getFileDependencies( $context ) );
// Filter out any duplicates from getFileDependencies() and others.
// Most commonly introduced by compileLessFile(), which always includes the
// entry point Less file we already know about.
$files = array_values( array_unique( $files ) );
// Don't include keys or file paths here, only the hashes. Including that would needlessly
// cause global cache invalidation when files move or if e.g. the MediaWiki path changes.
// Any significant ordering is already detected by the definition summary.
return array_map( [ __CLASS__, 'safeFileHash' ], $files );
}
/**
* Get the definition summary for this module.
*
* @param ResourceLoaderContext $context
* @return array
*/
public function getDefinitionSummary( ResourceLoaderContext $context ) {
$summary = parent::getDefinitionSummary( $context );
$options = [];
foreach ( [
// The following properties are omitted because they don't affect the module reponse:
// - localBasePath (Per T104950; Changes when absolute directory name changes. If
// this affects 'scripts' and other file paths, getFileHashes accounts for that.)
// - remoteBasePath (Per T104950)
// - dependencies (provided via startup module)
// - targets
// - group (provided via startup module)
// - position (only used by OutputPage)
'scripts',
'debugScripts',
'styles',
'languageScripts',
'skinScripts',
'skinStyles',
'messages',
'templates',
'skipFunction',
'debugRaw',
'raw',
] as $member ) {
$options[$member] = $this->{$member};
};
$summary[] = [
'options' => $options,
'fileHashes' => $this->getFileHashes( $context ),
'messageBlob' => $this->getMessageBlob( $context ),
];
return $summary;
}
/**
* @param string|ResourceLoaderFilePath $path
* @return string
*/
protected function getLocalPath( $path ) {
if ( $path instanceof ResourceLoaderFilePath ) {
return $path->getLocalPath();
}
return "{$this->localBasePath}/$path";
}
/**
* @param string|ResourceLoaderFilePath $path
* @return string
*/
protected function getRemotePath( $path ) {
if ( $path instanceof ResourceLoaderFilePath ) {
return $path->getRemotePath();
}
return "{$this->remoteBasePath}/$path";
}
/**
* Infer the stylesheet language from a stylesheet file path.
*
* @since 1.22
* @param string $path
* @return string The stylesheet language name
*/
public function getStyleSheetLang( $path ) {
return preg_match( '/\.less$/i', $path ) ? 'less' : 'css';
}
/**
* Collates file paths by option (where provided).
*
* @param array $list List of file paths in any combination of index/path
* or path/options pairs
* @param string $option Option name
* @param mixed $default Default value if the option isn't set
* @return array List of file paths, collated by $option
*/
protected static function collateFilePathListByOption( array $list, $option, $default ) {
$collatedFiles = [];
foreach ( (array)$list as $key => $value ) {
if ( is_int( $key ) ) {
// File name as the value
if ( !isset( $collatedFiles[$default] ) ) {
$collatedFiles[$default] = [];
}
$collatedFiles[$default][] = $value;
} elseif ( is_array( $value ) ) {
// File name as the key, options array as the value
$optionValue = isset( $value[$option] ) ? $value[$option] : $default;
if ( !isset( $collatedFiles[$optionValue] ) ) {
$collatedFiles[$optionValue] = [];
}
$collatedFiles[$optionValue][] = $key;
}
}
return $collatedFiles;
}
/**
* Get a list of element that match a key, optionally using a fallback key.
*
* @param array $list List of lists to select from
* @param string $key Key to look for in $map
* @param string $fallback Key to look for in $list if $key doesn't exist
* @return array List of elements from $map which matched $key or $fallback,
* or an empty list in case of no match
*/
protected static function tryForKey( array $list, $key, $fallback = null ) {
if ( isset( $list[$key] ) && is_array( $list[$key] ) ) {
return $list[$key];
} elseif ( is_string( $fallback )
&& isset( $list[$fallback] )
&& is_array( $list[$fallback] )
) {
return $list[$fallback];
}
return [];
}
/**
* Get a list of file paths for all scripts in this module, in order of proper execution.
*
* @param ResourceLoaderContext $context
* @return array List of file paths
*/
protected function getScriptFiles( ResourceLoaderContext $context ) {
$files = array_merge(
$this->scripts,
$this->getLanguageScripts( $context->getLanguage() ),
self::tryForKey( $this->skinScripts, $context->getSkin(), 'default' )
);
if ( $context->getDebug() ) {
$files = array_merge( $files, $this->debugScripts );
}
return array_unique( $files, SORT_REGULAR );
}
/**
* Get the set of language scripts for the given language,
* possibly using a fallback language.
*
* @param string $lang
* @return array
*/
private function getLanguageScripts( $lang ) {
$scripts = self::tryForKey( $this->languageScripts, $lang );
if ( $scripts ) {
return $scripts;
}
$fallbacks = Language::getFallbacksFor( $lang );
foreach ( $fallbacks as $lang ) {
$scripts = self::tryForKey( $this->languageScripts, $lang );
if ( $scripts ) {
return $scripts;
}
}
return [];
}
/**
* Get a list of file paths for all styles in this module, in order of proper inclusion.
*
* @param ResourceLoaderContext $context
* @return array List of file paths
*/
public function getStyleFiles( ResourceLoaderContext $context ) {
return array_merge_recursive(
self::collateFilePathListByOption( $this->styles, 'media', 'all' ),
self::collateFilePathListByOption(
self::tryForKey( $this->skinStyles, $context->getSkin(), 'default' ),
'media',
'all'
)
);
}
/**
* Gets a list of file paths for all skin styles in the module used by
* the skin.
*
* @param string $skinName The name of the skin
* @return array A list of file paths collated by media type
*/
protected function getSkinStyleFiles( $skinName ) {
return self::collateFilePathListByOption(
self::tryForKey( $this->skinStyles, $skinName ),
'media',
'all'
);
}
/**
* Gets a list of file paths for all skin style files in the module,
* for all available skins.
*
* @return array A list of file paths collated by media type
*/
protected function getAllSkinStyleFiles() {
$styleFiles = [];
$internalSkinNames = array_keys( Skin::getSkinNames() );
$internalSkinNames[] = 'default';
foreach ( $internalSkinNames as $internalSkinName ) {
$styleFiles = array_merge_recursive(
$styleFiles,
$this->getSkinStyleFiles( $internalSkinName )
);
}
return $styleFiles;
}
/**
* Returns all style files and all skin style files used by this module.
*
* @return array
*/
public function getAllStyleFiles() {
$collatedStyleFiles = array_merge_recursive(
self::collateFilePathListByOption( $this->styles, 'media', 'all' ),
$this->getAllSkinStyleFiles()
);
$result = [];
foreach ( $collatedStyleFiles as $media => $styleFiles ) {
foreach ( $styleFiles as $styleFile ) {
$result[] = $this->getLocalPath( $styleFile );
}
}
return $result;
}
/**
* Gets the contents of a list of JavaScript files.
*
* @param array $scripts List of file paths to scripts to read, remap and concetenate
* @throws MWException
* @return string Concatenated and remapped JavaScript data from $scripts
*/
protected function readScriptFiles( array $scripts ) {
if ( empty( $scripts ) ) {
return '';
}
$js = '';
foreach ( array_unique( $scripts, SORT_REGULAR ) as $fileName ) {
$localPath = $this->getLocalPath( $fileName );
if ( !file_exists( $localPath ) ) {
throw new MWException( __METHOD__ . ": script file not found: \"$localPath\"" );
}
$contents = $this->stripBom( file_get_contents( $localPath ) );
if ( $this->getConfig()->get( 'ResourceLoaderValidateStaticJS' ) ) {
// Static files don't really need to be checked as often; unlike
// on-wiki module they shouldn't change unexpectedly without
// admin interference.
$contents = $this->validateScriptFile( $fileName, $contents );
}
$js .= $contents . "\n";
}
return $js;
}
/**
* Gets the contents of a list of CSS files.
*
* @param array $styles List of media type/list of file paths pairs, to read, remap and
* concetenate
* @param bool $flip
* @param ResourceLoaderContext $context
*
* @throws MWException
* @return array List of concatenated and remapped CSS data from $styles,
* keyed by media type
*
* @since 1.27 Calling this method without a ResourceLoaderContext instance
* is deprecated.
*/
public function readStyleFiles( array $styles, $flip, $context = null ) {
if ( $context === null ) {
wfDeprecated( __METHOD__ . ' without a ResourceLoader context', '1.27' );
$context = ResourceLoaderContext::newDummyContext();
}
if ( empty( $styles ) ) {
return [];
}
foreach ( $styles as $media => $files ) {
$uniqueFiles = array_unique( $files, SORT_REGULAR );
$styleFiles = [];
foreach ( $uniqueFiles as $file ) {
$styleFiles[] = $this->readStyleFile( $file, $flip, $context );
}
$styles[$media] = implode( "\n", $styleFiles );
}
return $styles;
}
/**
* Reads a style file.
*
* This method can be used as a callback for array_map()
*
* @param string $path File path of style file to read
* @param bool $flip
* @param ResourceLoaderContext $context
*
* @return string CSS data in script file
* @throws MWException If the file doesn't exist
*/
protected function readStyleFile( $path, $flip, $context ) {
$localPath = $this->getLocalPath( $path );
$remotePath = $this->getRemotePath( $path );
if ( !file_exists( $localPath ) ) {
$msg = __METHOD__ . ": style file not found: \"$localPath\"";
wfDebugLog( 'resourceloader', $msg );
throw new MWException( $msg );
}
if ( $this->getStyleSheetLang( $localPath ) === 'less' ) {
$style = $this->compileLessFile( $localPath, $context );
$this->hasGeneratedStyles = true;
} else {
$style = $this->stripBom( file_get_contents( $localPath ) );
}
if ( $flip ) {
$style = CSSJanus::transform( $style, true, false );
}
$localDir = dirname( $localPath );
$remoteDir = dirname( $remotePath );
// Get and register local file references
$localFileRefs = CSSMin::getLocalFileReferences( $style, $localDir );
foreach ( $localFileRefs as $file ) {
if ( file_exists( $file ) ) {
$this->localFileRefs[] = $file;
} else {
$this->missingLocalFileRefs[] = $file;
}
}
// Don't cache this call. remap() ensures data URIs embeds are up to date,
// and urls contain correct content hashes in their query string. (T128668)
return CSSMin::remap( $style, $localDir, $remoteDir, true );
}
/**
* Get whether CSS for this module should be flipped
* @param ResourceLoaderContext $context
* @return bool
*/
public function getFlip( $context ) {
return $context->getDirection() === 'rtl';
}
/**
* Get target(s) for the module, eg ['desktop'] or ['desktop', 'mobile']
*
* @return array Array of strings
*/
public function getTargets() {
return $this->targets;
}
/**
* Compile a LESS file into CSS.
*
* Keeps track of all used files and adds them to localFileRefs.
*
* @since 1.22
* @since 1.27 Added $context paramter.
* @throws Exception If less.php encounters a parse error
* @param string $fileName File path of LESS source
* @param ResourceLoaderContext $context Context in which to generate script
* @return string CSS source
*/
protected function compileLessFile( $fileName, ResourceLoaderContext $context ) {
static $cache;
if ( !$cache ) {
$cache = ObjectCache::getLocalServerInstance( CACHE_ANYTHING );
}
// Construct a cache key from the LESS file name and a hash digest
// of the LESS variables used for compilation.
$vars = $this->getLessVars( $context );
ksort( $vars );
$varsHash = hash( 'md4', serialize( $vars ) );
$cacheKey = $cache->makeGlobalKey( 'LESS', $fileName, $varsHash );
$cachedCompile = $cache->get( $cacheKey );
// If we got a cached value, we have to validate it by getting a
// checksum of all the files that were loaded by the parser and
// ensuring it matches the cached entry's.
if ( isset( $cachedCompile['hash'] ) ) {
$contentHash = FileContentsHasher::getFileContentsHash( $cachedCompile['files'] );
if ( $contentHash === $cachedCompile['hash'] ) {
$this->localFileRefs = array_merge( $this->localFileRefs, $cachedCompile['files'] );
return $cachedCompile['css'];
}
}
$compiler = $context->getResourceLoader()->getLessCompiler( $vars );
$css = $compiler->parseFile( $fileName )->getCss();
$files = $compiler->AllParsedFiles();
$this->localFileRefs = array_merge( $this->localFileRefs, $files );
$cache->set( $cacheKey, [
'css' => $css,
'files' => $files,
'hash' => FileContentsHasher::getFileContentsHash( $files ),
], 60 * 60 * 24 ); // 86400 seconds, or 24 hours.
return $css;
}
/**
* Takes named templates by the module and returns an array mapping.
* @return array of templates mapping template alias to content
* @throws MWException
*/
public function getTemplates() {
$templates = [];
foreach ( $this->templates as $alias => $templatePath ) {
// Alias is optional
if ( is_int( $alias ) ) {
$alias = $templatePath;
}
$localPath = $this->getLocalPath( $templatePath );
if ( file_exists( $localPath ) ) {
$content = file_get_contents( $localPath );
$templates[$alias] = $this->stripBom( $content );
} else {
$msg = __METHOD__ . ": template file not found: \"$localPath\"";
wfDebugLog( 'resourceloader', $msg );
throw new MWException( $msg );
}
}
return $templates;
}
/**
* Takes an input string and removes the UTF-8 BOM character if present
*
* We need to remove these after reading a file, because we concatenate our files and
* the BOM character is not valid in the middle of a string.
* We already assume UTF-8 everywhere, so this should be safe.
*
* @return string input minus the intial BOM char
*/
protected function stripBom( $input ) {
if ( substr_compare( "\xef\xbb\xbf", $input, 0, 3 ) === 0 ) {
return substr( $input, 3 );
}
return $input;
}
}