Pagination Revisited

(@dglingren)

What you need is some way to get the number of images, calculate the number of pages, etc.; usually a job for PHP and implemented by the site theme. I can be more helpful if you send the source for the page on which this code occurs.

Thread Starter

Mike Matenkosky

(@hikinmike)

My ‘attachment-image.php’ page:

<?php
/**
* My Custon 'attachment-image.php' Page
* Added PhotoPress Plugin, Prev/Next Links and MLA Gallery Code
*/

get_header(); // Loads the header.php template. ?>

	<div id="content">

		<div class="hfeed">

			<?php if ( have_posts() ) : ?>

				<?php while ( have_posts() ) : the_post(); ?>

					<article id="post-<?php the_ID(); ?>" class="<?php hybrid_entry_class(); ?>">

						<header class="entry-header">
							<?php echo apply_atomic_shortcode( 'entry_title', the_title( '<h1 class="entry-title">', '</h1>', false ) ); ?>
						</header><!-- .entry-header -->

						<div class="entry-content">

							<?php if ( has_excerpt() ) {
								$src = wp_get_attachment_image_src( get_the_ID(), 'full' );
								echo do_shortcode( sprintf( '[caption align="aligncenter" width="%1$s"]%3$s %2$s[/caption]', esc_attr( $src[1] ), get_the_excerpt(), wp_get_attachment_image( get_the_ID(), 'full', false ) ) );
							} else {
								echo wp_get_attachment_image( get_the_ID(), 'full', false, array( 'class' => 'aligncenter' ) );
							} ?>
							<div itemprop="description" class="attachment-image-desc">
								<?php the_content( __( 'Continue reading <span class="meta-nav">&rarr;</span>', 'chun' ) ); ?>
							</div>
							<?php wp_link_pages( array( 'before' => '<p class="page-links">' . __( 'Pages:', 'chun' ), 'after' => '</p>' ) ); ?>

							<div id="mla-tags">
								<p><span>Tags: </span>
									<?php $tax_object = get_taxonomy( 'attachment_tag' );
										$terms = wp_get_object_terms( get_the_ID(), 'attachment_tag' );
										if ( !is_wp_error( $terms ) ) {
											if ( empty( $terms ) )
												return 'none';
											$list = array();
											foreach ( $terms as $term ) {
												$term_name = esc_html( sanitize_term_field( 'name', $term->name, $term->term_id, 'category', 'display' ) );
												$list[ ] = sprintf( '<a href="%1$s/%2$s" title="Gallery for %3$s">%4$s</a>', site_url('media-tags'), $term->slug, $term_name, $term_name );
											} // foreach $term
											echo join( ', ', $list );
										} // if !is_wp_error
										else {
											return 'not supported';}
										?>
								</p>
							</div><!-- MLA Attachment Tags -->

							<div id="photo-press">
								<?php dynamic_sidebar('papt-image-sidebar'); ?>
							</div><!-- PhotoPress Plugin-->

							<div class="prev-next">
								<?php
									if ( isset( $_REQUEST['attachment_category'] ) && isset( $_REQUEST['attachment_tag'] ) ) {
										$previous_link =  do_shortcode( sprintf( '[mla_gallery mla_output="previous_link" mla_link_text="◄ Previous" numberposts="100" attachment_category="%1$s" attachment_tag="%2$s" id="%3$s" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]', $_REQUEST['attachment_category'], $_REQUEST['attachment_tag'], get_the_ID() ) );
										$next_link =  do_shortcode( sprintf( '[mla_gallery mla_output="next_link" mla_link_text="Next ►" numberposts="100" attachment_category="%1$s" attachment_tag="%2$s" id="%3$s" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]', $_REQUEST['attachment_category'], $_REQUEST['attachment_tag'], get_the_ID() ) );
									}
									else {
										$previous_link =  previous_image_link( false, '◄ Previous' );
										$next_link = next_image_link( false, 'Next ►' );
									}
								?>
								<div class="prev"><?php echo $previous_link; ?></div>
								<div class="next"><?php echo $next_link; ?></div>
							</div><!-- Custom Prev/Next Links -->

						</div><!-- .entry-content -->

					</article><!-- .hentry -->

					<div class="attachment-meta">

						<?php chun_image_info(); ?>

						<div id="mla-gallery">
							<?php if ( isset( $_REQUEST['attachment_category'] ) && isset( $_REQUEST['attachment_tag'] ) ) {
								$gallery = do_shortcode( sprintf( '[mla_gallery exclude="%1$s" columns="4" numberposts="100" mla_style=cleaner mla_markup=cleaner attachment_category="%2$s" attachment_tag="%3$s" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]', get_the_ID(), $_REQUEST['attachment_category'], $_REQUEST['attachment_tag'] ) );
							} else {
								$gallery = do_shortcode( sprintf( '[gallery id="%1$s" exclude="%2$s" columns="4" numberposts="100" orderby="rand"]', $post->post_parent, get_the_ID() ) );
							} ?>
						</div><!-- Custom MLA Plugin Start-->	

						<?php if ( !empty( $gallery ) ) { ?>
							<div class="image-gallery">
								<h3><?php _e( 'Gallery', 'chun' ); ?></h3>
								<?php echo $gallery; ?>
							</div>
						<?php } ?>

					</div><!-- .attachment-meta -->

				<?php endwhile; ?>

			<?php endif; ?>

		</div><!-- .hfeed -->

	</div><!-- #content -->

<?php get_footer(); // Loads the footer.php template. ?>

Thread Starter

Mike Matenkosky

(@hikinmike)

I just realized that was the wrong file. I’ll e-mail it to you instead.

Plugin Author

(@dglingren)

I got the file, thanks. I’ll have to work thru the details and look at how the theme handles pagination. I won’t make much progress until I’m back home, but I will update this topic when I have more information. Thanks for your patience.

Thread Starter

Mike Matenkosky

(@hikinmike)

No hurry David.

brpubs

(@brpubs)

I’ve just run into a different type of pagination issue. If I try to filter the library by category — or, it seems, any filter — the first page displays correctly. However, if I then click on the arrow to see the next page, it reverts to showing me the full library.

So, for example, when I filter on one category, it comes up showing that I’m on page 1 of 3. But when I click the next arrow, I end up on page 2 of 8.

I didn’t notice that before this latest update — but it could be that I just didn’t notice it. I did just add several other plug-ins recently, so I suppose it could also be an interaction.

Thanks!

Plugin Author

(@dglingren)

Pagination Bug in v1.41 Media/Assistant submenu

brpubs,

Thank you for bringing this new MLA defect to my attention. I have opened a separate support topic for it, since it is unrelated to the pagination issues discussed in this topic. You can view the new topic here:

I will fix this in the next release and post an update here when that’s done.

Plugin Author

(@dglingren)

I have released version 1.42, which includes several new features designed to support pagination of [mla_gallery] galleries. The Settings/Media Library Assistant Documentation tab has more information and examples of these new features.

Your first post in this topic concerns a “paginated single post”, where the  Quicktag is used to divide a single post or page into two or more pages. I have enhanced the paged=current parameter to better handle this case. You no longer need to code a different offset parameter in each of the shortcodes on the post/page.

The more general case of building a post/page containing an [mla_gallery] with a large number of items divided among two or more “gallery pages” is handled by the new pagination parameters, mla_output=next_page and mla_output=previous_page. Complete information and examples are in the documentation.

I will work through the taxonomy-attachment-tag.php file you sent and see what’s required to incorporate the new features in your theme. I’ll post an update here with a solution.

Plugin Author

(@dglingren)

Here is more information on improving the “paginated single post” part of the topic.

There are two alternative solutions: 1) you can retain the  Quicktags and modify the [mla_gallery] shortcodes to use “paged=current”, or 2) you can add the new “mla_output” pagination parameters.

To retain the  Quicktags, the page would look like this:

[mla_gallery style="launch" numberposts="10" paged=current columns="5" attachment_category="att-category-landscape" attachment_tag="att-tag-yosemite" mla_caption="{+title+}" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]

<!--nextpage-->

[mla_gallery style="launch" numberposts="10" paged=current columns="5" attachment_category="att-category-landscape" attachment_tag="att-tag-yosemite" mla_caption="{+title+}" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]

The only change I’ve made is to replace the “offset” parameter with “paged=current”; the advantage is that all of the [mla_gallery] shortcodes are now identical. To add another page, just copy and paste. The disadvantage is that to add a page you have to cut and paste…

Moving on to the alternative using the new pagination parameters, you can re-code the page to handle any number of “gallery pages”. You need three [mla_gallery] shortcodes, as shown in the example I added to the Documentation tab:

[mla_gallery style="launch" numberposts="10" columns="5" attachment_category="att-category-landscape" attachment_tag="att-tag-yosemite" mla_caption="{+title+}" mla_link_href="{+link_url+}&attachment_category={+query:attachment_category+}&attachment_tag={+query:attachment_tag+}"]

<div style="clear: both; float: left">
[mla_gallery mla_output="previous_page" numberposts="10" attachment_category="att-category-landscape" attachment_tag="att-tag-yosemite"]
</div>
<div style="float: right">
[mla_gallery mla_output="next_page" numberposts="10" attachment_category="att-category-landscape" attachment_tag="att-tag-yosemite"]
</div>

I removed the Quicktag and the “paged-current” parameter; MLA will manage the gallery paging. There’s a single main gallery shortcode with the “style” and “columns” parameters. There are two new shortcodes for the pagination links. These have no style, columns, mla_caption or mla_link_href parameters (not applicable). They have the new mla_output parameters to generate the appropriate links.

I surrounded them with some <div> markup to format them. You can add class attributes and such to make them more compatible with your theme.

Plugin Author

(@dglingren)