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Diffstat (limited to 'includes/common.inc')
| -rw-r--r-- | includes/common.inc | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/includes/common.inc b/includes/common.inc index 95f083b0e..eb9b6f343 100644 --- a/includes/common.inc +++ b/includes/common.inc @@ -5390,6 +5390,18 @@ function drupal_common_theme() { 'variables' => array('links' => NULL, 'attributes' => array('class' => array('links')), 'heading' => array()), ), 'image' => array( + // HTML 4 and XHTML 1.0 always require an alt attribute. The HTML 5 draft + // allows the alt attribute to be omitted in some cases. Therefore, + // default the alt attribute to an empty string, but allow code calling + // theme('image') to pass explicit NULL for it to be omitted. Usually, + // neither omission nor an empty string satisfies accessibility + // requirements, so it is strongly encouraged for code calling + // theme('image') to pass a meaningful value for the alt variable. + // - http://www.w3.org/TR/REC-html40/struct/objects.html#h-13.8 + // - http://www.w3.org/TR/xhtml1/dtds.html + // - http://dev.w3.org/html5/spec/Overview.html#alt + // The title attribute is optional in all cases, so it is omitted by + // default. 'variables' => array('path' => NULL, 'alt' => '', 'title' => NULL, 'attributes' => array(), 'getsize' => TRUE), ), 'breadcrumb' => array( |