From 049823aaa55ed284337e3c423ddd9ceae18fa3fa Mon Sep 17 00:00:00 2001
From: Laury GvR <laury@gaslightmedia.com>
Date: Thu, 18 Jun 2015 11:46:29 -0400
Subject: [PATCH] Contextual/highlight search added.

---
 root/functions.php | 26 ++++++++++++++++++++
 root/search.php    | 59 +++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 84 insertions(+), 1 deletion(-)

diff --git a/root/functions.php b/root/functions.php
index de3c741..269793f 100644
--- a/root/functions.php
+++ b/root/functions.php
@@ -204,4 +204,30 @@ function glm_side_menu() {
 
 
 add_action('wp_enqueue_scripts', 'glm_site_scripts');
+
+
+//<!-- Start of the Contextual/Highlight Search functions -->
+function mytheme_init() {
+   remove_action('thematic_searchloop', 'thematic_search_loop');
+}
+
+add_action('init', 'mytheme_init', 10);
+
+function mytheme_search_loop() {
+  while ( have_posts() ) : the_post(); ?>
+ 
+    <div id="post-<?php the_ID() ?>" class="<?php thematic_post_class() ?>">
+      <?php thematic_postheader(); ?>
+      <div class="entry-content">
+        <?php thematic_content(); /* We will replace this next */ ?>
+ 
+      </div>
+      <?php thematic_postfooter(); ?>
+  </div><!-- .post -->
+ 
+  <?php endwhile;
+}
+
+add_action('thematic_searchloop', 'mytheme_search_loop');
+///<!-- End of the Contextual/Highlight Search functions -->
 ?>
diff --git a/root/search.php b/root/search.php
index 9a03e76..3fef015 100644
--- a/root/search.php
+++ b/root/search.php
@@ -14,7 +14,64 @@
                             <h1 class="entry-title"><a href="<?php the_permalink(); ?>"><?php the_title();?></a></h1>
                             <span class="meta date">Posted on <?php the_time('F jS, Y') ?></span>
                         </header>
-                        <?php echo (function_exists('the_advanced_excerpt')) ? the_advanced_excerpt(): the_excerpt(); ?>
+                        
+                                                            
+                <!-- Start of the Contextual/Highlight Search -->
+                                <?php
+                                // Configuration
+                                $max_length = 400; // Max length in characters
+                                $min_padding = 30; // Min length in characters of the context to place around found search terms
+
+                                // Load content as plain text
+                                global $wp_query, $post;
+                                $content = (!post_password_required($post) ? strip_tags(preg_replace(array("/\r?\n/", '@<\s*(p|br\s*/?)\s*>@'), array(' ', "\n"), apply_filters('the_content', $post->post_content))) : '');
+
+                                // Search content for terms
+                                $terms = $wp_query->query_vars['search_terms'];
+                                if ( preg_match_all('/'.str_replace('/', '\/', join('|', $terms)).'/i', $content, $matches, PREG_OFFSET_CAPTURE) ) {
+                                    $padding = max($min_padding, $max_length / (2*count($matches[0])));
+
+                                  // Construct extract containing context for each term
+                                  $output = '';
+                                  $last_offset = 0;
+                                  foreach ( $matches[0] as $match ) {
+                                    list($string, $offset) = $match;
+                                    $start  = $offset-$padding;
+                                    $end = $offset+strlen($string)+$padding;
+                                    // Preserve whole words
+                                    while ( $start > 1 && preg_match('/[A-Za-z0-9\'"-]/', $content{$start-1}) ) $start--;
+                                    while ( $end < strlen($content)-1 && preg_match('/[A-Za-z0-9\'"-]/', $content{$end}) ) $end++;
+                                    $start = max($start, $last_offset);
+                                    $context = substr($content, $start, $end-$start);
+                                    if ( $start > $last_offset ) $context = '...'.$context;
+                                    $output .= $context;
+                                    $last_offset = $end;
+                                  }
+
+                                  if ( $last_offset != strlen($content)-1 ) $output .= '...';
+                                } else {
+                                  $output = $content;
+                                }
+
+                                if ( strlen($output) > $max_length ) {
+                                  $end = $max_length-3;
+                                  while ( $end > 1 && preg_match('/[A-Za-z0-9\'"-]/', $output{$end-1}) ) $end--;
+                                  $output = substr($output, 0, $end) . '...';
+                                }
+
+                                // Highlight matches
+                                $context = nl2br(preg_replace('/'.str_replace('/', '\/', join('|', $terms)).'/i', '<strong>$0</strong>', $output));
+                                ?>
+
+                                <p class="search_result_context">
+                                  <?php echo $context ?>
+                                </p>
+                                <p>
+                                  <a href="<?php the_permalink() ?>" rel="bookmark">Read this entry</a>
+                                </p>  
+                <!-- End of the Contextual/Highlight Search -->
+                
+                        <?php //echo (function_exists('the_advanced_excerpt')) ? the_advanced_excerpt(): the_excerpt(); ?>
                         <footer class="entry-meta small-12 medium-6 medium-push-3 center">
                             <?php
                             if (has_category()) {
-- 
2.17.1