if ( !$this->mArticleBodyOnly ) {
$sk = $this->getSkin();
-
- if ( $sk->shouldPreloadLogo() ) {
- $this->addLogoPreloadLinkHeaders();
- }
}
$linkHeader = $this->getLinkHeader();
] );
}
- /**
- * Add Link headers for preloading the wiki's logo.
- *
- * @since 1.26
- */
- protected function addLogoPreloadLinkHeaders() {
- $logo = ResourceLoaderSkinModule::getLogo( $this->getConfig() );
-
- $tags = [];
- $logosPerDppx = [];
- $logos = [];
-
- if ( !is_array( $logo ) ) {
- // No media queries required if we only have one variant
- $this->addLinkHeader( '<' . $logo . '>;rel=preload;as=image' );
- return;
- }
-
- if ( isset( $logo['svg'] ) ) {
- // No media queries required if we only have a 1x and svg variant
- // because all preload-capable browsers support SVGs
- $this->addLinkHeader( '<' . $logo['svg'] . '>;rel=preload;as=image' );
- return;
- }
-
- foreach ( $logo as $dppx => $src ) {
- // Keys are in this format: "1.5x"
- $dppx = substr( $dppx, 0, -1 );
- $logosPerDppx[$dppx] = $src;
- }
-
- // Because PHP can't have floats as array keys
- uksort( $logosPerDppx, function ( $a , $b ) {
- $a = floatval( $a );
- $b = floatval( $b );
- // Sort from smallest to largest (e.g. 1x, 1.5x, 2x)
- return $a <=> $b;
- } );
-
- foreach ( $logosPerDppx as $dppx => $src ) {
- $logos[] = [ 'dppx' => $dppx, 'src' => $src ];
- }
-
- $logosCount = count( $logos );
- // Logic must match ResourceLoaderSkinModule:
- // - 1x applies to resolution < 1.5dppx
- // - 1.5x applies to resolution >= 1.5dppx && < 2dppx
- // - 2x applies to resolution >= 2dppx
- // Note that min-resolution and max-resolution are both inclusive.
- for ( $i = 0; $i < $logosCount; $i++ ) {
- if ( $i === 0 ) {
- // Smallest dppx
- // min-resolution is ">=" (larger than or equal to)
- // "not min-resolution" is essentially "<"
- $media_query = 'not all and (min-resolution: ' . $logos[ 1 ]['dppx'] . 'dppx)';
- } elseif ( $i !== $logosCount - 1 ) {
- // In between
- // Media query expressions can only apply "not" to the entire expression
- // (e.g. can't express ">= 1.5 and not >= 2).
- // Workaround: Use <= 1.9999 in place of < 2.
- $upper_bound = floatval( $logos[ $i + 1 ]['dppx'] ) - 0.000001;
- $media_query = '(min-resolution: ' . $logos[ $i ]['dppx'] .
- 'dppx) and (max-resolution: ' . $upper_bound . 'dppx)';
- } else {
- // Largest dppx
- $media_query = '(min-resolution: ' . $logos[ $i ]['dppx'] . 'dppx)';
- }
-
- $this->addLinkHeader(
- '<' . $logos[$i]['src'] . '>;rel=preload;as=image;media=' . $media_query
- );
- }
- }
-
/**
* Get (and set if not yet set) the CSP nonce.
*