From 0f43a2d1db1ce153b2a24a501072bcbea3ad921b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Holger=20Ko=CC=88nemann?= <office@holgerkoenemann.de>
Date: Sun, 15 May 2016 20:38:34 +0200
Subject: [PATCH] Adding pagination and TOC nav with BS4 markup

---
 inc/bootstrap-wp-pagination.php | 95 +++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 inc/bootstrap-wp-pagination.php

diff --git a/inc/bootstrap-wp-pagination.php b/inc/bootstrap-wp-pagination.php
new file mode 100644
index 0000000..8e14836
--- /dev/null
+++ b/inc/bootstrap-wp-pagination.php
@@ -0,0 +1,95 @@
+<?php
+// Bootstrap pagination for index and category pages
+if ( ! function_exists( 'b4st_pagination' ) ) {
+	function b4st_pagination() {
+		global $wp_query;
+		$big = 999999999; // This needs to be an unlikely integer
+		// For more options and info view the docs for paginate_links()
+		// http://codex.wordpress.org/Function_Reference/paginate_links
+		$paginate_links = paginate_links( array(
+			'base' => str_replace( $big, '%#%', get_pagenum_link($big) ),
+			'current' => max( 1, get_query_var('paged') ),
+			'total' => $wp_query->max_num_pages,
+			'mid_size' => 5,
+			'prev_next' => True,
+			'prev_text' => __('<i class="fa fa-angle-left"></i> Newer'),
+			'next_text' => __('Older <i class="fa fa-angle-right"></i>'),
+			'type' => 'list'
+		) );
+		$paginate_links = str_replace( "<ul class='page-numbers'>", "<ul class='pagination'>", $paginate_links );
+		$paginate_links = str_replace( "<li><span class='page-numbers current'>", "<li class='page-item active'><a class='page-link' href='#'>", $paginate_links );
+    $paginate_links = str_replace( "<li>", "<li class='page-item'>", $paginate_links );
+		$paginate_links = str_replace( "<a", "<a class='page-link' ", $paginate_links );
+		$paginate_links = str_replace( "</span>", "</a>", $paginate_links );
+		$paginate_links = preg_replace( "/\s*page-numbers/", "", $paginate_links );
+		// Display the pagination if more than one page is found
+		if ( $paginate_links ) {
+			echo $paginate_links;
+		}
+	}
+}
+
+// Bootstrap pagination for split posts / split pages
+// Copied and modified from: https://gist.github.com/ebinnion/7635465
+add_filter('wp_link_pages', 'b4st_wp_link_pages');
+function b4st_wp_link_pages($wp_links){
+	global $post;
+	// Generate current page base url without pagination.
+	$post_base = trailingslashit( get_site_url(null, $post->post_name) );
+  $wp_links = trim(str_replace(array('<p>Pages: ', '</p>'), '', $wp_links));
+	// Get out of here ASAP if there is no paging.
+	
+  if ( empty($wp_links) )
+		return '';
+    // Split at spaces
+    $splits = explode(' ', $wp_links );
+    $links = array();
+    $current_page = 1;
+  // Since links are now split up such that <a and href='.+' are seperate, loop over split array and correct the links
+	foreach( $splits as $key => $split ){
+		if( is_numeric($split) ) {
+			$links[] = $split;
+			$current_page = $split;
+		} else if ( strpos($split, 'href') === false ) {
+			$links[] = $split . ' ' . $splits[$key + 1];
+		}
+	}
+	$num_pages = count($links);
+  
+	// Output pagination
+	$output = '';
+  
+  // Page status
+  $output .= '<br><hr>';
+  $output .= '<p class="text-muted"><big><em>Page ' . $current_page . ' of ' . $num_pages . '</em></big></p>';
+  
+  // Start the pagination list
+	$output .= '<ul class="pagination">';
+  
+  // Fastbackward to first page in series
+	if ( $current_page > 2 )
+	$output .= '<li class="page-item"><a class="page-link" href="' . $post_base . '"><i class="fa fa-angle-double-left"></i></a></li>';
+  // Backward to previous page in series
+	if ( $current_page > 1 )
+		$output .= '<li class="page-item"><a class="page-link" href="' . $post_base . ($current_page - 1) . '"><i class="fa fa-angle-left"></i></a></li>';
+	
+  // Loop through links to each page in series
+  foreach( $links as $key => $link ) {
+    $temp_key = $key + 1;
+    if ( $current_page == $temp_key )
+      $output .= '<li  class="page-item active"><a class="page-link" href="' . $post_base . $temp_key . '">' . $temp_key . '</a></li>';
+    else
+      $output .= '<li  class="page-item"><a class="page-link" href="' . $post_base . $temp_key . '">' . $temp_key . '</a></li>';
+	}  
+  // Forward to next page in series
+	if ( $current_page < $num_pages )
+		$output .= '<li class="page-item"><a class="page-link" href="' . $post_base . ($current_page + 1) . '"><i class="fa fa-angle-right"></i></a></li>';
+  // Fastforward to last page in series
+  if ( $current_page < ($num_pages - 1) )
+    $output .= '<li class="page-item"><a class="page-link" href="' . $post_base . $num_pages . '"><i class="fa fa-angle-double-right"></i></a></li>';
+  
+  // Complete the pagination list
+	$output .= '</ul>';  
+	return $output;
+}
+