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Forked from billerickson/functions.php
Created February 12, 2012 04:01
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Genesis Grid Loop Advanced
<?php
/**
* Possibly amend the loop.
*
* Specify the conditions under which the grid loop should be used.
*
* @author Bill Erickson
* @author Gary Jones
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*
* @return boolean Return true of doing the grid loop, false if not.
*/
function child_is_doing_grid_loop() {
// Amend this conditional to pick where this grid looping occurs.
// This says to use the grid loop everywhere except single posts,
// single pages and single attachments.
return ( ! is_singular() );
}
/**
* Grid Loop Arguments
*
* Specify all the desired grid loop and query arguments
*
* @author Bill Erickson
* @author Gary Jones
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*
* @return array $arguments
*/
function child_grid_loop_arguments() {
$grid_args = array(
'features' => 1,
'feature_content_limit' => 0,
'feature_image_size' => 0,
'feature_image_class' => 'alignleft post-image',
'grid_content_limit' => 0,
'grid_image_size' => 'grid-thumbnail',
'grid_image_class' => 'alignleft post-image',
'more' => __( 'Continue reading &#x2192;', 'genesis' ),
);
$query_args = array(
'posts_per_page' => 6,
);
return array(
'grid_args' => $grid_args,
'query_args' => $query_args,
);
}
add_action( 'genesis_before_loop', 'child_prepare_grid_loop' );
/**
* Prepare Grid Loop.
*
* Swap out the standard loop with the grid and apply classes.
*
* @author Gary Jones
* @author Bill Erickson
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*/
function child_prepare_grid_loop() {
if ( child_is_doing_grid_loop() ) {
// Remove the standard loop
remove_action( 'genesis_loop', 'genesis_do_loop' );
// Use the prepared grid loop
add_action( 'genesis_loop', 'child_do_grid_loop' );
// Add some extra post classes to the grid loop so we can style the columns
add_filter( 'genesis_grid_loop_post_class', 'child_grid_loop_post_class' );
}
}
add_action( 'pre_get_posts', 'child_grid_query' );
/**
* Grid query to get the posts that will appear in the grid.
*
* Any changes to the actual query (posts per page, category…) should be here.
*
* @author Bill Erickson
* @author Gary Jones
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*
* @param WP_Query $query
*/
function child_grid_query( $query ) {
// Only apply to main query, if this matches our grid query conditional, and if it isn't in the back-end
if ( $query->is_main_query() && child_is_doing_grid_loop() && ! is_admin() ) {
// Get all arguments
$args = child_grid_loop_arguments();
// Don't edit below, this does the logic to figure out how many posts on each page
$posts_per_page = $args['query_args']['posts_per_page'];
$features = $args['grid_args']['features'];
$offset = 0;
$paged = $query->query_vars['paged'];
if ( 0 == $paged )
// If first page, add number of features to grid posts, so balance is maintained
$posts_per_page += $features;
else
// Keep the offset maintained from our page 1 adjustment
$offset = ( $paged - 1 ) * $posts_per_page + $features;
$query->set( 'posts_per_page', $posts_per_page );
$query->set( 'offset', $offset );
}
}
/**
* Prepare the grid loop.
*
* Only use grid-specific arguments. All query args should be done in the
* child_grid_query() function.
*
* @author Gary Jones
* @author Bill Erickson
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*
* @uses genesis_grid_loop() Requires Genesis 1.5
*
* @global WP_Query $wp_query Post query object.
*/
function child_do_grid_loop() {
global $wp_query;
// Grid specific arguments
$all_args = child_grid_loop_arguments();
$grid_args = $all_args['grid_args'];
// Combine with original query
$args = array_merge( $wp_query->query_vars, $grid_args );
// Create the Grid Loop
genesis_grid_loop( $args );
}
/**
* Add some extra body classes to grid posts.
*
* Change the $columns value to alter how many columns wide the grid uses.
*
* @author Gary Jones
* @author Bill Erickson
* @link http://code.garyjones.co.uk/genesis-grid-loop-advanced/
*
* @global array $_genesis_loop_args
* @global integer $loop_counter
*
* @param array $grid_classes
*/
function child_grid_loop_post_class( $grid_classes ) {
global $_genesis_loop_args, $loop_counter;
// Alter this number to change the number of columns - used to add class names
$columns = 3;
// Be able to convert the number of columns to the class name in Genesis
$fractions = array( '', 'half', 'third', 'fourth', 'fifth', 'sixth' );
// Only want extra classes on grid posts, not feature posts
if ( $loop_counter >= $_genesis_loop_args['features'] ) {
// Make a note of which column we're in
$column_number = ( ( $loop_counter - $_genesis_loop_args['features'] ) % $columns ) + 1;
// Add genesis-grid-column-? class to know how many columns across we are
$grid_classes[] = sprintf( 'genesis-grid-column-%d', $column_number );
// Add one-* class to make it correct width
$grid_classes[] = sprintf( 'one-' . $fractions[$columns - 1], $columns );
// Add a class to the first column, so we're sure of starting a new row with no padding-left
if ( 1 == $column_number )
$grid_classes[] = 'first';
}
return $grid_classes;
}
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