3ff2615992
This existed for internal use by OutputPage, which is no longer the case as of I11b390f2e4f5e7db. Also move the unit tests from OutputPageTest, to ResourceLoaderSkinModuleTest. Change-Id: I8b23f976f5f89b1005b387a827f75031f5c96141
242 lines
7 KiB
PHP
242 lines
7 KiB
PHP
<?php
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/**
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* ResourceLoader module for skin stylesheets.
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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 Timo Tijhof
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*/
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class ResourceLoaderSkinModule extends ResourceLoaderFileModule {
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/**
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* All skins are assumed to be compatible with mobile
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*/
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public $targets = [ 'desktop', 'mobile' ];
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/**
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* @param ResourceLoaderContext $context
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* @return array
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*/
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public function getStyles( ResourceLoaderContext $context ) {
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$logo = $this->getLogoData( $this->getConfig() );
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$styles = parent::getStyles( $context );
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$this->normalizeStyles( $styles );
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$default = !is_array( $logo ) ? $logo : $logo['1x'];
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$styles['all'][] = '.mw-wiki-logo { background-image: ' .
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CSSMin::buildUrlValue( $default ) .
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'; }';
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if ( is_array( $logo ) ) {
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if ( isset( $logo['svg'] ) ) {
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$styles['all'][] = '.mw-wiki-logo { ' .
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'background-image: -webkit-linear-gradient(transparent, transparent), ' .
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CSSMin::buildUrlValue( $logo['svg'] ) . '; ' .
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'background-image: linear-gradient(transparent, transparent), ' .
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CSSMin::buildUrlValue( $logo['svg'] ) . ';' .
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'background-size: 135px auto; }';
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} else {
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if ( isset( $logo['1.5x'] ) ) {
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$styles[
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'(-webkit-min-device-pixel-ratio: 1.5), ' .
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'(min--moz-device-pixel-ratio: 1.5), ' .
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'(min-resolution: 1.5dppx), ' .
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'(min-resolution: 144dpi)'
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][] = '.mw-wiki-logo { background-image: ' .
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CSSMin::buildUrlValue( $logo['1.5x'] ) . ';' .
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'background-size: 135px auto; }';
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}
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if ( isset( $logo['2x'] ) ) {
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$styles[
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'(-webkit-min-device-pixel-ratio: 2), ' .
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'(min--moz-device-pixel-ratio: 2), ' .
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'(min-resolution: 2dppx), ' .
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'(min-resolution: 192dpi)'
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][] = '.mw-wiki-logo { background-image: ' .
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CSSMin::buildUrlValue( $logo['2x'] ) . ';' .
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'background-size: 135px auto; }';
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}
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}
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}
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return $styles;
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}
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/**
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* @param ResourceLoaderContext $context
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* @return array
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*/
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public function getPreloadLinks( ResourceLoaderContext $context ) {
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return $this->getLogoPreloadlinks();
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}
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/**
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* Helper method for getPreloadLinks()
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* @return array
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*/
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private function getLogoPreloadlinks() {
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$logo = $this->getLogoData( $this->getConfig() );
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$tags = [];
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$logosPerDppx = [];
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$logos = [];
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$preloadLinks = [];
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if ( !is_array( $logo ) ) {
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// No media queries required if we only have one variant
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$preloadLinks[ $logo ] = [ 'as' => 'image' ];
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return $preloadLinks;
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}
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if ( isset( $logo['svg'] ) ) {
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// No media queries required if we only have a 1x and svg variant
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// because all preload-capable browsers support SVGs
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$preloadLinks [ $logo['svg'] ] = [ 'as' => 'image' ];
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return $preloadLinks;
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}
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foreach ( $logo as $dppx => $src ) {
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// Keys are in this format: "1.5x"
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$dppx = substr( $dppx, 0, -1 );
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$logosPerDppx[$dppx] = $src;
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}
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// Because PHP can't have floats as array keys
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uksort( $logosPerDppx, function ( $a , $b ) {
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$a = floatval( $a );
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$b = floatval( $b );
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// Sort from smallest to largest (e.g. 1x, 1.5x, 2x)
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return $a <=> $b;
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} );
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foreach ( $logosPerDppx as $dppx => $src ) {
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$logos[] = [ 'dppx' => $dppx, 'src' => $src ];
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}
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$logosCount = count( $logos );
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// Logic must match ResourceLoaderSkinModule:
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// - 1x applies to resolution < 1.5dppx
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// - 1.5x applies to resolution >= 1.5dppx && < 2dppx
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// - 2x applies to resolution >= 2dppx
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// Note that min-resolution and max-resolution are both inclusive.
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for ( $i = 0; $i < $logosCount; $i++ ) {
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if ( $i === 0 ) {
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// Smallest dppx
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// min-resolution is ">=" (larger than or equal to)
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// "not min-resolution" is essentially "<"
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$media_query = 'not all and (min-resolution: ' . $logos[ 1 ]['dppx'] . 'dppx)';
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} elseif ( $i !== $logosCount - 1 ) {
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// In between
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// Media query expressions can only apply "not" to the entire expression
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// (e.g. can't express ">= 1.5 and not >= 2).
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// Workaround: Use <= 1.9999 in place of < 2.
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$upper_bound = floatval( $logos[ $i + 1 ]['dppx'] ) - 0.000001;
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$media_query = '(min-resolution: ' . $logos[ $i ]['dppx'] .
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'dppx) and (max-resolution: ' . $upper_bound . 'dppx)';
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} else {
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// Largest dppx
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$media_query = '(min-resolution: ' . $logos[ $i ]['dppx'] . 'dppx)';
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}
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$preloadLinks[ $logos[$i]['src'] ] = [ 'as' => 'image', 'media' => $media_query ];
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}
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return $preloadLinks;
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}
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/**
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* Ensure all media keys use array values.
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*
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* Normalises arrays returned by the ResourceLoaderFileModule::getStyles() method.
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*
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* @param array &$styles Associative array, keys are strings (media queries),
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* values are strings or arrays
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*/
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private function normalizeStyles( &$styles ) {
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foreach ( $styles as $key => $val ) {
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if ( !is_array( $val ) ) {
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$styles[$key] = [ $val ];
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}
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}
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}
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/**
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* @since 1.31
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* @param Config $conf
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* @return string|array Single url if no variants are defined,
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* or an array of logo urls keyed by dppx in form "<float>x".
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* Key "1x" is always defined. Key "svg" may also be defined,
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* in which case variants other than "1x" are omitted.
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*/
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protected function getLogoData( Config $conf ) {
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$logo = $conf->get( 'Logo' );
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$logoHD = $conf->get( 'LogoHD' );
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$logo1Url = OutputPage::transformResourcePath( $conf, $logo );
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if ( !$logoHD ) {
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return $logo1Url;
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}
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$logoUrls = [
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'1x' => $logo1Url,
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];
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if ( isset( $logoHD['svg'] ) ) {
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$logoUrls['svg'] = OutputPage::transformResourcePath(
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$conf,
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$logoHD['svg']
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);
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} else {
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// Only 1.5x and 2x are supported
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if ( isset( $logoHD['1.5x'] ) ) {
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$logoUrls['1.5x'] = OutputPage::transformResourcePath(
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$conf,
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$logoHD['1.5x']
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);
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}
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if ( isset( $logoHD['2x'] ) ) {
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$logoUrls['2x'] = OutputPage::transformResourcePath(
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$conf,
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$logoHD['2x']
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);
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}
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}
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return $logoUrls;
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}
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/**
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* @param ResourceLoaderContext $context
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* @return bool
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*/
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public function isKnownEmpty( ResourceLoaderContext $context ) {
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// Regardless of whether the files are specified, we always
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// provide mw-wiki-logo styles.
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return false;
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}
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public function getDefinitionSummary( ResourceLoaderContext $context ) {
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$summary = parent::getDefinitionSummary( $context );
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$summary[] = [
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'logo' => $this->getConfig()->get( 'Logo' ),
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'logoHD' => $this->getConfig()->get( 'LogoHD' ),
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];
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return $summary;
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}
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}
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