Designed for Wordpress 2.1 - Display a weighted list of category links. Mods for coloured/weighted list by Dean Robinson. Based on Weighted Categories Plugin by Matt Kingston
Version: 2.0
Author: Dean Robinson
Author URI: http://www.deanjrobinson.com/
*/
function weighted_categories($weighted, $colored, $smallest=70, $largest=250, $unit="%", $lightest="#FFFFFF", $darkest="#666666", $exclude='')
{
$cats = get_all_cats(1, 'all', 'name', 'asc', '', false, 0, 1, 1, 1, true, 0, 0, 1, '', '', $exclude, false);
// list_cats($optionall = 1, $all = 'All', $sort_column = 'ID', $sort_order = 'asc', $file = '', $list = true, $optiondates = 0, $optioncount = 0, $hide_empty = 1, $use_desc_for_title = 1, $children=FALSE, $child_of=0, $categories=0, $recurse=0, $feed = '', $feed_image = '', $exclude = '', $hierarchical=FALSE)
$cats = explode("\n", $cats);
foreach ($cats as $cat)
{
eregi("a href=\"(.+)\" ", $cat, $regs);
$catlink = $regs[1];
$cat = trim(strip_tags($cat));
eregi("(.*) \(([0-9]+)\)$", $cat, $regs);
$title = preg_replace('(\s\(([0-9]+)\))','', $cat);
$catname = $title; $count = $regs[2];
$counts{$catname} = $count;
$catlinks{$catname} = $catlink;
}
$spread = max($counts) - min($counts);
if ($spread <= 0) { $spread = 1; };
$fontspread = $largest - $smallest;
$fontstep = $spread / $fontspread;
if ($fontspread <= 0) { $fontspread = 1; }
$lightred = hexdec(substr($lightest,1,2));
$darkred = hexdec(substr($darkest,1,2));
$redspread = $lightred - $darkred;
if($redspread <=0) { $redspread = $darkred - $lightred; }
$redstep = $redspread / $spread;
$lightgreen = hexdec(substr($lightest,3,2));
$darkgreen = hexdec(substr($darkest,3,2));
$greenspread = $lightgreen - $darkgreen;
if($greenspread <=0) { $greenspread = $darkgreen - $lightgreen; }
$greenstep = $greenspread / $spread;
$lightblue = hexdec(substr($lightest,5,2));
$darkblue = hexdec(substr($darkest,5,2));
$bluespread = $lightblue - $darkblue;
if($bluespread <=0) { $bluespread = $darkblue - $lightblue; }
$bluestep = $bluespread / $spread;
foreach ($counts as $catname => $count)
{
$scale = $count;// / ( $spread + 1); // * ($colorstep);
$catlink = $catlinks{$catname};
print "$catname\n";
}
}
/* adapted from Ultimate Tag Warrior Plugin for tag coloring */
function GetColorForWeight($scale,$darkred,$darkgreen,$darkblue,$redstep,$greenstep,$bluestep,$redspread,$greenspread,$bluespread) {
if ($scale) {
$redscale = $scale*$redstep;
$greenscale = $scale*$greenstep;
$bluescale = $scale*$bluestep;
$r = dechex(intval( $darkred + $redscale ));
$g = dechex(intval( $darkgreen + $greenscale ));
$b = dechex(intval( $darkblue + $bluescale ));
if (hexdec($r) >= 255) $r = "FF";
if (hexdec($g) >= 255) $g = "FF";
if (hexdec($b) >= 255) $b = "FF";
if (strlen($r) == 1) $r = "0" . $r;
if (strlen($g) == 1) $g = "0" . $g;
if (strlen($b) == 1) $b = "0" . $b;
return "#$r$g$b";
}
}
/* COPY OF list_cats() FROM wp-includes/template-functions-category.php ...I don't know why, but it wouldn't work without it ?? */
function get_all_cats($optionall = 1, $all = 'All', $sort_column = 'ID', $sort_order = 'asc', $file = '', $list = true, $optiondates = 0, $optioncount = 0, $hide_empty = 1, $use_desc_for_title = 1, $children=FALSE, $child_of=0, $categories=0, $recurse=0, $feed = '', $feed_image = '', $exclude = '', $hierarchical=FALSE) {
global $wpdb, $wp_query;
// Optiondates now works
if ( '' == $file )
$file = get_settings('home') . '/';
$exclusions = '';
if ( !empty($exclude) ) {
$excats = preg_split('/[\s,]+/',$exclude);
if ( count($excats) ) {
foreach ( $excats as $excat ) {
$exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
}
}
}
$exclusions = apply_filters('list_cats_exclusions', $exclusions );
if ( intval($categories) == 0 ) {
$sort_column = 'cat_'.$sort_column;
$query = "
SELECT cat_ID, cat_name, category_nicename, category_description, category_parent, category_count
FROM $wpdb->categories
WHERE cat_ID > 0 $exclusions
ORDER BY $sort_column $sort_order";
$categories = $wpdb->get_results($query);
}
if ( $optiondates ) {
$cat_dates = $wpdb->get_results(" SELECT category_id,
UNIX_TIMESTAMP( MAX(post_date) ) AS ts
FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
WHERE post_status = 'publish' AND post_id = ID $exclusions
GROUP BY category_id");
foreach ( $cat_dates as $cat_date ) {
$category_timestamp["$cat_date->category_id"] = $cat_date->ts;
}
}
$num_found=0;
$thelist = "";
foreach ( (array) $categories as $category ) {
if ( ( intval($hide_empty) == 0 || $category->category_count) && (!$hierarchical || $category->category_parent == $child_of) ) {
$num_found++;
$link = 'category_description) )
$link .= 'title="'. sprintf(__("View all posts filed under %s"), wp_specialchars($category->cat_name)) . '"';
else
$link .= 'title="' . wp_specialchars(apply_filters('category_description',$category->category_description,$category)) . '"';
$link .= '>';
$link .= apply_filters('list_cats', $category->cat_name, $category).'';
if ( (! empty($feed_image)) || (! empty($feed)) ) {
$link .= ' ';
if ( empty($feed_image) )
$link .= '(';
$link .= '';
else
$link .= $name;
$link .= '';
if (empty($feed_image))
$link .= ')';
}
if ( intval($optioncount) == 1 )
$link .= ' ('.intval($category->category_count).')';
if ( $optiondates ) {
if ( $optiondates == 1 )
$optiondates = 'Y-m-d';
$link .= ' ' . gmdate($optiondates, $category_timestamp["$category->cat_ID"]);
}
if ( $list ) {
$thelist .= "\tcat_ID == $wp_query->get_queried_object_id()) && is_category()) {
$thelist .= ' class="current-cat"';
}
$thelist .= ">$link\n";
} else {
$thelist .= "\t$link
\n";
}
if ($hierarchical && $children)
$thelist .= list_cats($optionall, $all, $sort_column, $sort_order, $file, $list, $optiondates, $optioncount, $hide_empty, $use_desc_for_title, $hierarchical, $category->cat_ID, $categories, 1, $feed, $feed_image, $exclude, $hierarchical);
if ($list)
$thelist .= "\n";
}
}
if ( !$num_found && !$child_of ) {
if ( $list ) {
$before = '';
$after = '';
}
echo $before . __("No categories") . $after . "\n";
return;
}
if ( $list && $child_of && $num_found && $recurse ) {
$pre = "\t\t\n";
} else {
$pre = $post = '';
}
$thelist = $pre . $thelist . $post;
if ( $recurse )
return $thelist;
echo apply_filters('list_cats', $thelist);
}
?>