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<title>[11894] trunk/wp-includes/category-template.php:
Logarithmic scale for tag cloud, props kometbomb, fixes #10703</title>
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<div id="msg">
<dl>
<dt>Revision</dt> <dd><a href="http://trac.wordpress.org/changeset/11894">11894</a></dd>
<dt>Author</dt> <dd>azaozz</dd>
<dt>Date</dt> <dd>2009-09-01 20:06:11 +0000 (Tue, 01 Sep 2009)</dd>
</dl>
<h3>Log Message</h3>
<pre>Logarithmic scale for tag cloud, props kometbomb, fixes <a href="http://trac.wordpress.org/ticket/10703">#10703</a></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludescategorytemplatephp">trunk/wp-includes/category-template.php</a></li>
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<div id="patch">
<h3>Diff</h3>
<a id="trunkwpincludescategorytemplatephp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/category-template.php (11893 => 11894)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/category-template.php 2009-08-28 07:18:05 UTC (rev 11893)
+++ trunk/wp-includes/category-template.php 2009-09-01 20:06:11 UTC (rev 11894)
</span><span class="lines">@@ -566,6 +566,17 @@
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> /**
</span><ins>+ * Default topic count scaling for tag links
+ *
+ * @param integer $count number of posts with that tag
+ * @return integer scaled count
+ */
+function default_topic_count_scale( $count ) {
+ return round(log10($count + 1) * 100);
+}
+
+
+/**
</ins><span class="cx"> * Generates a tag cloud (heatmap) from provided data.
</span><span class="cx"> *
</span><span class="cx"> * The text size is set by the 'smallest' and 'largest' arguments, which will
</span><span class="lines">@@ -602,7 +613,7 @@
</span><span class="cx"> 'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 0,
</span><span class="cx"> 'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
</span><span class="cx"> 'topic_count_text_callback' => 'default_topic_count_text',
</span><del>- 'filter' => 1,
</del><ins>+ 'filter' => 1, 'topic_count_scale_callback' => 'default_topic_count_scale'
</ins><span class="cx"> );
</span><span class="cx">
</span><span class="cx"> if ( !isset( $args['topic_count_text_callback'] ) && isset( $args['single_text'] ) && isset( $args['multiple_text'] ) ) {
</span><span class="lines">@@ -641,8 +652,11 @@
</span><span class="cx"> $tags = array_slice($tags, 0, $number);
</span><span class="cx">
</span><span class="cx"> $counts = array();
</span><del>- foreach ( (array) $tags as $key => $tag )
- $counts[ $key ] = $tag->count;
</del><ins>+ $real_counts = array(); // For the alt tag
+ foreach ( (array) $tags as $key => $tag ) {
+ $real_counts[ $key ] = $tag->count;
+ $counts[ $key ] = $topic_count_scale_callback($tag->count);
+ }
</ins><span class="cx">
</span><span class="cx"> $min_count = min( $counts );
</span><span class="cx"> $spread = max( $counts ) - $min_count;
</span><span class="lines">@@ -659,10 +673,11 @@
</span><span class="cx">
</span><span class="cx"> foreach ( $tags as $key => $tag ) {
</span><span class="cx"> $count = $counts[ $key ];
</span><ins>+ $real_count = $real_counts[ $key ];
</ins><span class="cx"> $tag_link = '#' != $tag->link ? esc_url( $tag->link ) : '#';
</span><span class="cx"> $tag_id = isset($tags[ $key ]->id) ? $tags[ $key ]->id : $key;
</span><span class="cx"> $tag_name = $tags[ $key ]->name;
</span><del>- $a[] = "<a href='$tag_link' class='tag-link-$tag_id' title='" . esc_attr( $topic_count_text_callback( $count ) ) . "'$rel style='font-size: " .
</del><ins>+ $a[] = "<a href='$tag_link' class='tag-link-$tag_id' title='" . esc_attr( $topic_count_text_callback( $real_count ) ) . "'$rel style='font-size: " .
</ins><span class="cx"> ( $smallest + ( ( $count - $min_count ) * $font_step ) )
</span><span class="cx"> . "$unit;'>$tag_name</a>";
</span><span class="cx"> }
</span></span></pre>
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