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<?php |
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/** |
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* ResourceLoader module for generated and embedded images. |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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* @author Trevor Parscal |
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*/ |
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/** |
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* ResourceLoader module for generated and embedded images. |
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* |
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* @since 1.25 |
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*/ |
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class ResourceLoaderImageModule extends ResourceLoaderModule { |
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protected $definition = null; |
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/** |
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* Local base path, see __construct() |
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* @var string |
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*/ |
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protected $localBasePath = ''; |
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protected $origin = self::ORIGIN_CORE_SITEWIDE; |
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protected $images = []; |
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protected $variants = []; |
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protected $prefix = null; |
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protected $selectorWithoutVariant = '.{prefix}-{name}'; |
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protected $selectorWithVariant = '.{prefix}-{name}-{variant}'; |
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protected $targets = [ 'desktop', 'mobile' ]; |
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/** @var string Position on the page to load this module at */ |
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protected $position = 'bottom'; |
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/** |
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* Constructs a new module from an options array. |
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* |
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* @param array $options List of options; if not given or empty, an empty module will be |
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* constructed |
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* @param string $localBasePath Base path to prepend to all local paths in $options. Defaults |
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* to $IP |
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* |
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* Below is a description for the $options array: |
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* @par Construction options: |
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* @code |
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* [ |
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* // Base path to prepend to all local paths in $options. Defaults to $IP |
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* 'localBasePath' => [base path], |
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* // Path to JSON file that contains any of the settings below |
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* 'data' => [file path string] |
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* // CSS class prefix to use in all style rules |
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* 'prefix' => [CSS class prefix], |
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* // Alternatively: Format of CSS selector to use in all style rules |
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* 'selector' => [CSS selector template, variables: {prefix} {name} {variant}], |
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* // Alternatively: When using variants |
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* 'selectorWithoutVariant' => [CSS selector template, variables: {prefix} {name}], |
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* 'selectorWithVariant' => [CSS selector template, variables: {prefix} {name} {variant}], |
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* // List of variants that may be used for the image files |
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* 'variants' => [ |
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* [theme name] => [ |
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* [variant name] => [ |
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* 'color' => [color string, e.g. '#ffff00'], |
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* 'global' => [boolean, if true, this variant is available |
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* for all images of this type], |
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* ], |
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* ... |
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* ], |
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* ... |
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* ], |
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* // List of image files and their options |
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* 'images' => [ |
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* [theme name] => [ |
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* [icon name] => [ |
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* 'file' => [file path string or array whose values are file path strings |
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* and whose keys are 'default', 'ltr', 'rtl', a single |
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* language code like 'en', or a list of language codes like |
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* 'en,de,ar'], |
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* 'variants' => [array of variant name strings, variants |
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* available for this image], |
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* ], |
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* ... |
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* ], |
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* ... |
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* ], |
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* ] |
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* @endcode |
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* @throws InvalidArgumentException |
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*/ |
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public function __construct( $options = [], $localBasePath = null ) { |
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$this->localBasePath = self::extractLocalBasePath( $options, $localBasePath ); |
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$this->definition = $options; |
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} |
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/** |
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* Parse definition and external JSON data, if referenced. |
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*/ |
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protected function loadFromDefinition() { |
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if ( $this->definition === null ) { |
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return; |
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} |
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$options = $this->definition; |
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$this->definition = null; |
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if ( isset( $options['data'] ) ) { |
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$dataPath = $this->localBasePath . '/' . $options['data']; |
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$data = json_decode( file_get_contents( $dataPath ), true ); |
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$options = array_merge( $data, $options ); |
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} |
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// Accepted combinations: |
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// * prefix |
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// * selector |
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// * selectorWithoutVariant + selectorWithVariant |
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// * prefix + selector |
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// * prefix + selectorWithoutVariant + selectorWithVariant |
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$prefix = isset( $options['prefix'] ) && $options['prefix']; |
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$selector = isset( $options['selector'] ) && $options['selector']; |
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$selectorWithoutVariant = isset( $options['selectorWithoutVariant'] ) |
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&& $options['selectorWithoutVariant']; |
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$selectorWithVariant = isset( $options['selectorWithVariant'] ) |
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&& $options['selectorWithVariant']; |
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if ( $selectorWithoutVariant && !$selectorWithVariant ) { |
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throw new InvalidArgumentException( |
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"Given 'selectorWithoutVariant' but no 'selectorWithVariant'." |
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); |
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} |
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if ( $selectorWithVariant && !$selectorWithoutVariant ) { |
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throw new InvalidArgumentException( |
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"Given 'selectorWithVariant' but no 'selectorWithoutVariant'." |
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); |
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} |
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if ( $selector && $selectorWithVariant ) { |
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throw new InvalidArgumentException( |
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"Incompatible 'selector' and 'selectorWithVariant'+'selectorWithoutVariant' given." |
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); |
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} |
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if ( !$prefix && !$selector && !$selectorWithVariant ) { |
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throw new InvalidArgumentException( |
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"None of 'prefix', 'selector' or 'selectorWithVariant'+'selectorWithoutVariant' given." |
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); |
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} |
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foreach ( $options as $member => $option ) { |
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switch ( $member ) { |
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case 'images': |
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case 'variants': |
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if ( !is_array( $option ) ) { |
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throw new InvalidArgumentException( |
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"Invalid list error. '$option' given, array expected." |
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); |
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} |
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if ( !isset( $option['default'] ) ) { |
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// Backwards compatibility |
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$option = [ 'default' => $option ]; |
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} |
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foreach ( $option as $skin => $data ) { |
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if ( !is_array( $option ) ) { |
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throw new InvalidArgumentException( |
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"Invalid list error. '$option' given, array expected." |
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); |
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} |
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} |
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$this->{$member} = $option; |
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break; |
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case 'position': |
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case 'prefix': |
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case 'selectorWithoutVariant': |
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case 'selectorWithVariant': |
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$this->{$member} = (string)$option; |
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break; |
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case 'selector': |
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$this->selectorWithoutVariant = $this->selectorWithVariant = (string)$option; |
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} |
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} |
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} |
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/** |
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* Get CSS class prefix used by this module. |
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* @return string |
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*/ |
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public function getPrefix() { |
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$this->loadFromDefinition(); |
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return $this->prefix; |
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} |
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/** |
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* Get CSS selector templates used by this module. |
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* @return string |
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*/ |
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public function getSelectors() { |
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$this->loadFromDefinition(); |
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return [ |
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'selectorWithoutVariant' => $this->selectorWithoutVariant, |
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'selectorWithVariant' => $this->selectorWithVariant, |
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]; |
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} |
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/** |
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* Get a ResourceLoaderImage object for given image. |
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* @param string $name Image name |
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* @param ResourceLoaderContext $context |
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* @return ResourceLoaderImage|null |
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*/ |
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public function getImage( $name, ResourceLoaderContext $context ) { |
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$this->loadFromDefinition(); |
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$images = $this->getImages( $context ); |
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return isset( $images[$name] ) ? $images[$name] : null; |
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} |
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/** |
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* Get ResourceLoaderImage objects for all images. |
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* @param ResourceLoaderContext $context |
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* @return ResourceLoaderImage[] Array keyed by image name |
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*/ |
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public function getImages( ResourceLoaderContext $context ) { |
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$skin = $context->getSkin(); |
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if ( !isset( $this->imageObjects ) ) { |
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$this->loadFromDefinition(); |
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$this->imageObjects = []; |
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} |
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if ( !isset( $this->imageObjects[$skin] ) ) { |
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$this->imageObjects[$skin] = []; |
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View Code Duplication |
if ( !isset( $this->images[$skin] ) ) { |
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$this->images[$skin] = isset( $this->images['default'] ) ? |
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$this->images['default'] : |
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[]; |
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} |
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foreach ( $this->images[$skin] as $name => $options ) { |
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$fileDescriptor = is_string( $options ) ? $options : $options['file']; |
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$allowedVariants = array_merge( |
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is_array( $options ) && isset( $options['variants'] ) ? $options['variants'] : [], |
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$this->getGlobalVariants( $context ) |
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); |
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if ( isset( $this->variants[$skin] ) ) { |
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$variantConfig = array_intersect_key( |
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$this->variants[$skin], |
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array_fill_keys( $allowedVariants, true ) |
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); |
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} else { |
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$variantConfig = []; |
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} |
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$image = new ResourceLoaderImage( |
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$name, |
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$this->getName(), |
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$fileDescriptor, |
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$this->localBasePath, |
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$variantConfig |
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); |
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$this->imageObjects[$skin][$image->getName()] = $image; |
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} |
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} |
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return $this->imageObjects[$skin]; |
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} |
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/** |
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* Get list of variants in this module that are 'global', i.e., available |
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* for every image regardless of image options. |
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* @param ResourceLoaderContext $context |
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* @return string[] |
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*/ |
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public function getGlobalVariants( ResourceLoaderContext $context ) { |
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$skin = $context->getSkin(); |
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if ( !isset( $this->globalVariants ) ) { |
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$this->loadFromDefinition(); |
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$this->globalVariants = []; |
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} |
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if ( !isset( $this->globalVariants[$skin] ) ) { |
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$this->globalVariants[$skin] = []; |
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View Code Duplication |
if ( !isset( $this->variants[$skin] ) ) { |
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$this->variants[$skin] = isset( $this->variants['default'] ) ? |
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$this->variants['default'] : |
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[]; |
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} |
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foreach ( $this->variants[$skin] as $name => $config ) { |
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if ( isset( $config['global'] ) && $config['global'] ) { |
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$this->globalVariants[$skin][] = $name; |
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} |
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} |
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} |
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return $this->globalVariants[$skin]; |
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} |
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/** |
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310
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* @param ResourceLoaderContext $context |
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311
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* @return array |
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*/ |
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public function getStyles( ResourceLoaderContext $context ) { |
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$this->loadFromDefinition(); |
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316
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// Build CSS rules |
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$rules = []; |
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$script = $context->getResourceLoader()->getLoadScript( $this->getSource() ); |
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319
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$selectors = $this->getSelectors(); |
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foreach ( $this->getImages( $context ) as $name => $image ) { |
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322
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$declarations = $this->getCssDeclarations( |
|
323
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|
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$image->getDataUri( $context, null, 'original' ), |
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|
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|
|
324
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|
|
$image->getUrl( $context, $script, null, 'rasterized' ) |
|
325
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); |
|
326
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|
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$declarations = implode( "\n\t", $declarations ); |
|
327
|
|
|
$selector = strtr( |
|
328
|
|
|
$selectors['selectorWithoutVariant'], |
|
329
|
|
|
[ |
|
330
|
|
|
'{prefix}' => $this->getPrefix(), |
|
331
|
|
|
'{name}' => $name, |
|
332
|
|
|
'{variant}' => '', |
|
333
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|
|
] |
|
334
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|
|
); |
|
335
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|
|
$rules[] = "$selector {\n\t$declarations\n}"; |
|
336
|
|
|
|
|
337
|
|
|
foreach ( $image->getVariants() as $variant ) { |
|
338
|
|
|
$declarations = $this->getCssDeclarations( |
|
339
|
|
|
$image->getDataUri( $context, $variant, 'original' ), |
|
|
|
|
|
|
340
|
|
|
$image->getUrl( $context, $script, $variant, 'rasterized' ) |
|
341
|
|
|
); |
|
342
|
|
|
$declarations = implode( "\n\t", $declarations ); |
|
343
|
|
|
$selector = strtr( |
|
344
|
|
|
$selectors['selectorWithVariant'], |
|
345
|
|
|
[ |
|
346
|
|
|
'{prefix}' => $this->getPrefix(), |
|
347
|
|
|
'{name}' => $name, |
|
348
|
|
|
'{variant}' => $variant, |
|
349
|
|
|
] |
|
350
|
|
|
); |
|
351
|
|
|
$rules[] = "$selector {\n\t$declarations\n}"; |
|
352
|
|
|
} |
|
353
|
|
|
} |
|
354
|
|
|
|
|
355
|
|
|
$style = implode( "\n", $rules ); |
|
356
|
|
|
return [ 'all' => $style ]; |
|
357
|
|
|
} |
|
358
|
|
|
|
|
359
|
|
|
/** |
|
360
|
|
|
* SVG support using a transparent gradient to guarantee cross-browser |
|
361
|
|
|
* compatibility (browsers able to understand gradient syntax support also SVG). |
|
362
|
|
|
* http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique |
|
363
|
|
|
* |
|
364
|
|
|
* Keep synchronized with the .background-image-svg LESS mixin in |
|
365
|
|
|
* /resources/src/mediawiki.less/mediawiki.mixins.less. |
|
366
|
|
|
* |
|
367
|
|
|
* @param string $primary Primary URI |
|
368
|
|
|
* @param string $fallback Fallback URI |
|
369
|
|
|
* @return string[] CSS declarations to use given URIs as background-image |
|
370
|
|
|
*/ |
|
371
|
|
|
protected function getCssDeclarations( $primary, $fallback ) { |
|
372
|
|
|
return [ |
|
373
|
|
|
"background-image: url($fallback);", |
|
374
|
|
|
"background-image: linear-gradient(transparent, transparent), url($primary);", |
|
375
|
|
|
// Do not serve SVG to Opera 12, bad rendering with border-radius or background-size (T87504) |
|
376
|
|
|
"background-image: -o-linear-gradient(transparent, transparent), url($fallback);", |
|
377
|
|
|
]; |
|
378
|
|
|
} |
|
379
|
|
|
|
|
380
|
|
|
/** |
|
381
|
|
|
* @return bool |
|
382
|
|
|
*/ |
|
383
|
|
|
public function supportsURLLoading() { |
|
384
|
|
|
return false; |
|
385
|
|
|
} |
|
386
|
|
|
|
|
387
|
|
|
/** |
|
388
|
|
|
* Get the definition summary for this module. |
|
389
|
|
|
* |
|
390
|
|
|
* @param ResourceLoaderContext $context |
|
391
|
|
|
* @return array |
|
392
|
|
|
*/ |
|
393
|
|
|
public function getDefinitionSummary( ResourceLoaderContext $context ) { |
|
394
|
|
|
$this->loadFromDefinition(); |
|
395
|
|
|
$summary = parent::getDefinitionSummary( $context ); |
|
396
|
|
|
|
|
397
|
|
|
$options = []; |
|
398
|
|
|
foreach ( [ |
|
399
|
|
|
'localBasePath', |
|
400
|
|
|
'images', |
|
401
|
|
|
'variants', |
|
402
|
|
|
'prefix', |
|
403
|
|
|
'selectorWithoutVariant', |
|
404
|
|
|
'selectorWithVariant', |
|
405
|
|
|
] as $member ) { |
|
406
|
|
|
$options[$member] = $this->{$member}; |
|
407
|
|
|
}; |
|
408
|
|
|
|
|
409
|
|
|
$summary[] = [ |
|
410
|
|
|
'options' => $options, |
|
411
|
|
|
'fileHashes' => $this->getFileHashes( $context ), |
|
412
|
|
|
]; |
|
413
|
|
|
return $summary; |
|
414
|
|
|
} |
|
415
|
|
|
|
|
416
|
|
|
/** |
|
417
|
|
|
* Helper method for getDefinitionSummary. |
|
418
|
|
|
*/ |
|
419
|
|
|
protected function getFileHashes( ResourceLoaderContext $context ) { |
|
420
|
|
|
$this->loadFromDefinition(); |
|
421
|
|
|
$files = []; |
|
422
|
|
|
foreach ( $this->getImages( $context ) as $name => $image ) { |
|
423
|
|
|
$files[] = $image->getPath( $context ); |
|
424
|
|
|
} |
|
425
|
|
|
$files = array_values( array_unique( $files ) ); |
|
426
|
|
|
return array_map( [ __CLASS__, 'safeFileHash' ], $files ); |
|
427
|
|
|
} |
|
428
|
|
|
|
|
429
|
|
|
/** |
|
430
|
|
|
* Extract a local base path from module definition information. |
|
431
|
|
|
* |
|
432
|
|
|
* @param array $options Module definition |
|
433
|
|
|
* @param string $localBasePath Path to use if not provided in module definition. Defaults |
|
434
|
|
|
* to $IP |
|
435
|
|
|
* @return string Local base path |
|
436
|
|
|
*/ |
|
437
|
|
|
public static function extractLocalBasePath( $options, $localBasePath = null ) { |
|
438
|
|
|
global $IP; |
|
439
|
|
|
|
|
440
|
|
|
if ( $localBasePath === null ) { |
|
441
|
|
|
$localBasePath = $IP; |
|
442
|
|
|
} |
|
443
|
|
|
|
|
444
|
|
|
if ( array_key_exists( 'localBasePath', $options ) ) { |
|
445
|
|
|
$localBasePath = (string)$options['localBasePath']; |
|
446
|
|
|
} |
|
447
|
|
|
|
|
448
|
|
|
return $localBasePath; |
|
449
|
|
|
} |
|
450
|
|
|
|
|
451
|
|
|
/** |
|
452
|
|
|
* @return string |
|
453
|
|
|
*/ |
|
454
|
|
|
public function getPosition() { |
|
455
|
|
|
$this->loadFromDefinition(); |
|
456
|
|
|
return $this->position; |
|
457
|
|
|
} |
|
458
|
|
|
|
|
459
|
|
|
/** |
|
460
|
|
|
* @return string |
|
461
|
|
|
*/ |
|
462
|
|
|
public function getType() { |
|
463
|
|
|
return self::LOAD_STYLES; |
|
464
|
|
|
} |
|
465
|
|
|
} |
|
466
|
|
|
|
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: