From 700bcb30b01301e9fb804ef1b1f13cbadcb44911 Mon Sep 17 00:00:00 2001
From: Remember the dot <rememberthedot@users.mediawiki.org>
Date: Wed, 15 Jul 2009 04:18:16 +0000
Subject: [PATCH] Applied image attribute improvements from r52726 to galleries
 as well

---
 includes/ImageGallery.php | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/includes/ImageGallery.php b/includes/ImageGallery.php
index 3228b5901a..987d76ad1c 100644
--- a/includes/ImageGallery.php
+++ b/includes/ImageGallery.php
@@ -236,7 +236,7 @@ class ImageGallery
 		$i = 0;
 		foreach ( $this->mImages as $pair ) {
 			$nt = $pair[0];
-			$text = $pair[1];
+			$text = $pair[1]; # "text" means "caption" here
 
 			# Give extensions a chance to select the file revision for us
 			$time = $descQuery = false;
@@ -265,6 +265,15 @@ class ImageGallery
 					. htmlspecialchars( $img->getLastError() ) . '</div>';
 			} else {
 				$vpad = floor( ( 1.25*$this->mHeights - $thumb->height ) /2 ) - 2;
+				
+				$imageParameters = array(
+					'desc-link' => true,
+					'desc-query' => $descQuery
+				);
+				# In the absence of a caption, fall back on providing screen readers with the filename as alt text
+				if ( $text == '' ) {
+					$imageParameters['alt'] = $nt->getText();
+				}
 
 				$thumbhtml = "\n\t\t\t".
 					'<div class="thumb" style="padding: ' . $vpad . 'px 0; width: ' .($this->mWidths+30).'px;">'
@@ -272,7 +281,7 @@ class ImageGallery
 					# handlers since they may emit block-level elements as opposed to simple <img> tags.
 					# ref http://css-discuss.incutio.com/?page=CenteringBlockElement
 					. '<div style="margin-left: auto; margin-right: auto; width: ' .$this->mWidths.'px;">'
-					. $thumb->toHtml( array( 'desc-link' => true, 'desc-query' => $descQuery ) ) . '</div></div>';
+					. $thumb->toHtml( $imageParameters ) . '</div></div>';
 
 				// Call parser transform hook
 				if ( $this->mParser && $img->getHandler() ) {
-- 
2.20.1