PackedOverlayImageGallery.php

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<?php
class PackedOverlayImageGallery extends PackedImageGallery {
    protected function wrapGalleryText( $galleryText, $thumb ) {
        // If we have no text, do not output anything to avoid
        // ugly white overlay.
        if ( trim( $galleryText ) === '' ) {
            return '';
        }
 
        # ATTENTION: The newline after <div class="gallerytext"> is needed to
        # accommodate htmltidy which in version 4.8.6 generated crackpot HTML
        # in its absence, see: https://phabricator.wikimedia.org/T3765
        # -Ævar
 
        $thumbWidth = $this->getGBWidth( $thumb ) - $this->getThumbPadding() - $this->getGBPadding();
        $captionWidth = ceil( $thumbWidth - 20 );
 
        $outerWrapper = '<div class="gallerytextwrapper" style="width: ' . $captionWidth . 'px">';
 
        return "\n\t\t\t" . $outerWrapper . '<div class="gallerytext">' . "\n"
            . $galleryText
            . "\n\t\t\t</div></div>";
    }
}