X-Git-Url: http://git.cyclocoop.org/?a=blobdiff_plain;f=includes%2FGlobalFunctions.php;h=5232413fddbf999af3b4cdbaea03397cf7d8b5ef;hb=c51517be480b3f44306bd4c9bd10d58ce5eb0e1e;hp=2025e170e90ec52792e86840cd11acc7e4076681;hpb=51ca723d00581b4c12f74e690f719e0f806c9329;p=lhc%2Fweb%2Fwiklou.git

diff --git a/includes/GlobalFunctions.php b/includes/GlobalFunctions.php
index 2025e170e9..5232413fdd 100644
--- a/includes/GlobalFunctions.php
+++ b/includes/GlobalFunctions.php
@@ -4198,3 +4198,91 @@ function wfIsConfiguredProxy( $ip ) {
 	wfDeprecated( __METHOD__, '1.24' );
 	return IP::isConfiguredProxy( $ip );
 }
+
+/**
+ * Returns true if these thumbnail parameters match one that MediaWiki
+ * requests from file description pages and/or parser output.
+ *
+ * $params is considered non-standard if they involve a non-standard
+ * width or any non-default parameters aside from width and page number.
+ * The number of possible files with standard parameters is far less than
+ * that of all combinations; rate-limiting for them can thus be more generious.
+ *
+ * @param File $file
+ * @param array $params
+ * @return bool
+ * @since 1.24 Moved from thumb.php to GlobalFunctions in 1.25
+ */
+function wfThumbIsStandard( File $file, array $params ) {
+	global $wgThumbLimits, $wgImageLimits, $wgResponsiveImages;
+
+	$multipliers = array( 1 );
+	if ( $wgResponsiveImages ) {
+		// These available sizes are hardcoded currently elsewhere in MediaWiki.
+		// @see Linker::processResponsiveImages
+		$multipliers[] = 1.5;
+		$multipliers[] = 2;
+	}
+
+	$handler = $file->getHandler();
+	if ( !$handler || !isset( $params['width'] ) ) {
+		return false;
+	}
+
+	$basicParams = array();
+	if ( isset( $params['page'] ) ) {
+		$basicParams['page'] = $params['page'];
+	}
+
+	$thumbLimits = array();
+	$imageLimits = array();
+	// Expand limits to account for multipliers
+	foreach ( $multipliers as $multiplier ) {
+		$thumbLimits = array_merge( $thumbLimits, array_map(
+			function ( $width ) use ( $multiplier ) {
+				return round( $width * $multiplier );
+			}, $wgThumbLimits )
+		);
+		$imageLimits = array_merge( $imageLimits, array_map(
+			function ( $pair ) use ( $multiplier ) {
+				return array(
+					round( $pair[0] * $multiplier ),
+					round( $pair[1] * $multiplier ),
+				);
+			}, $wgImageLimits )
+		);
+	}
+
+	// Check if the width matches one of $wgThumbLimits
+	if ( in_array( $params['width'], $thumbLimits ) ) {
+		$normalParams = $basicParams + array( 'width' => $params['width'] );
+		// Append any default values to the map (e.g. "lossy", "lossless", ...)
+		$handler->normaliseParams( $file, $normalParams );
+	} else {
+		// If not, then check if the width matchs one of $wgImageLimits
+		$match = false;
+		foreach ( $imageLimits as $pair ) {
+			$normalParams = $basicParams + array( 'width' => $pair[0], 'height' => $pair[1] );
+			// Decide whether the thumbnail should be scaled on width or height.
+			// Also append any default values to the map (e.g. "lossy", "lossless", ...)
+			$handler->normaliseParams( $file, $normalParams );
+			// Check if this standard thumbnail size maps to the given width
+			if ( $normalParams['width'] == $params['width'] ) {
+				$match = true;
+				break;
+			}
+		}
+		if ( !$match ) {
+			return false; // not standard for description pages
+		}
+	}
+
+	// Check that the given values for non-page, non-width, params are just defaults
+	foreach ( $params as $key => $value ) {
+		if ( !isset( $normalParams[$key] ) || $normalParams[$key] != $value ) {
+			return false;
+		}
+	}
+
+	return true;
+}