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Edit File: template-gallery-grid.php

<?php
if (!defined('ABSPATH'))
    exit; // Exit if accessed directly
/**
 * Template Gallery Grid
 * 
 * Access original fields: $args['mod_settings']
 * @author Themify
 */
$i = 0;
$pagination = $args['settings']['gallery_pagination'] && $args['settings']['gallery_per_page'] > 0;
$disable = Themify_Builder_Model::is_img_php_disabled();
if ($pagination) {
    $total = count($args['settings']['gallery_images']);
    if ($total <= $args['settings']['gallery_per_page']) {
        $pagination = false;
    } else {
        $current = isset($_GET['builder_gallery']) ? $_GET['builder_gallery'] : 1;
        $offset = $args['settings']['gallery_per_page'] * ( $current - 1 );
        $args['settings']['gallery_images'] = array_slice($args['settings']['gallery_images'], $offset, $args['settings']['gallery_per_page'], true);
    }
}
$columns = $args['columns'];
foreach ($args['settings']['gallery_images'] as $image) :
    $alt = get_post_meta($image->ID, '_wp_attachment_image_alt', true);
    $caption = !empty($image->post_excerpt) ? $image->post_excerpt : $alt;
    $title = $image->post_title;
    ?>

<dl class="gallery-item">
        <dt class="gallery-icon">
        <?php
        if ($args['settings']['link_opt'] === 'file') {
            $link = wp_get_attachment_image_src($image->ID, $args['settings']['link_image_size']);
            $link = $link[0];
        } elseif ('none' === $args['settings']['link_opt']) {
            $link = '';
        } else {
            $link = get_attachment_link($image->ID);
        }
        $link_before = '' !== $link ? sprintf('<a title="%s" href="%s">', esc_attr($caption), esc_url($link)) : '';
        $link_before = apply_filters('themify_builder_image_link_before', $link_before, $image, $args['settings']);
        $link_after = '' !== $link ? '</a>' : '';
        if ($disable) {
            $img = wp_get_attachment_image($image->ID, $args['settings']['image_size_gallery']);
        } else {
            $img = wp_get_attachment_image_src($image->ID, 'large');
            $img = themify_get_image("ignore=true&src={$img[0]}&w={$args['settings']['thumb_w_gallery']}&h={$args['settings']['thumb_h_gallery']}");
        }

echo!empty($img) ? $link_before . $img . $link_after : '';
        ?>
        </dt>
        <dd<?php if (($args['settings']['gallery_image_title'] === 'yes' && $title!=='' ) || ( $args['settings']['gallery_exclude_caption'] !== 'yes' && $caption!=='' )) : ?> class="wp-caption-text gallery-caption"<?php endif; ?>>
            <?php if ($args['settings']['gallery_image_title'] === 'yes' && $title!=='') : ?>
                <strong class="themify_image_title"><?php echo $title ?></strong>
            <?php endif; ?>
            <?php if ($args['settings']['gallery_exclude_caption'] !== 'yes' && $caption!=='') : ?>
                <span class="themify_image_caption"><?php echo $caption ?></span>
            <?php endif; ?>
        </dd>
    </dl>

<?php endforeach; // end loop  ?>
<br style="clear: both" />
<?php if ($pagination) : ?>
    <div class="pagenav clearfix">
        <?php
        /**
         * fix paginate_links url in modules loaded by Ajax request: the url does not match the actual page url.
         * #5345
         * @note: paginate_links seems buggy with successive requests, the url parameters get jumbled up;
         * hence the remove_query_args to remove the parameter from url before it's added in by paginate_links.
         */
        $key = defined('DOING_AJAX') && DOING_AJAX ? 'HTTP_REFERER' : 'REQUEST_URI';
        $base = remove_query_arg('builder_gallery', $_SERVER[$key]);
        $format = get_option( 'permalink_structure' ) === '' ? '&' : '?';

echo paginate_links(array(
            'base' => $base . '%_%',
            'current' => $current,
            'total' => ceil($total / $args['settings']['gallery_per_page']),
            'format' => $format . 'builder_gallery=%#%',
			'prev_next' => false,
        ));
        ?>
    </div>
<?php endif; ?>

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