--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/views_calc_field_handler.inc	Wed Aug 05 18:20:29 2009 +0200
@@ -0,0 +1,103 @@
+<?php
+// $Id: views_calc_field_handler.inc,v 1.3 2009/04/21 12:15:28 karens Exp $
+/**
+ * @file
+ * Copied from the basic 'node' field handler.
+ */
+
+/**
+ * Field handler to provide simple renderer that allows linking to a node.
+ */
+class views_calc_field_handler extends views_handler_field {
+  /**
+   * Constructor to provide additional field to add.
+   */
+  function construct() {
+    parent::construct();
+    $this->additional_fields['nid'] = 'nid';
+  }
+
+  function option_definition() {
+    $options = parent::option_definition();
+    $options['link_to_node'] = array('default' => FALSE);
+    return $options;
+  }
+
+  /**
+   * Provide link to node option
+   */
+  function options_form(&$form, &$form_state) {
+    parent::options_form($form, $form_state);
+    $form['link_to_node'] = array(
+      '#title' => t('Link this field to its node'),
+      '#type' => 'checkbox',
+      '#default_value' => !empty($this->options['link_to_node']),
+    );
+  }
+
+  /**
+   * Render whatever the data is as a link to the node.
+   *
+   * Data should be made XSS safe prior to calling this function.
+   */
+  function render_link($data, $values) {
+    if (!empty($this->options['link_to_node'])) {
+      return l($data, "node/" . $values->{$this->aliases['nid']}, array('html' => TRUE));
+    }
+    else {
+      return $data;
+    }
+  }
+
+  /**
+   * Find the right calculation and add it to the query as
+   * an aliased field.
+   */
+  function query() {
+    $results = _views_calc_fields();
+    while ($calc_field = db_fetch_array($results)) {
+      if ($this->definition['cid'] == $calc_field['cid']) {
+        foreach (explode(',', $calc_field['tablelist']) as $table) {
+          $this->view->query->add_table($table);
+        }
+        $this->view->query->add_field(NULL, "({$calc_field['calc']})", "cid". $calc_field['cid']);
+        return;
+      }
+    }    
+  }
+  
+  function pre_query() {
+    $this->field_alias = "cid{$this->definition['cid']}";
+    parent::pre_query();
+  }
+  
+  /**
+   * Use the requested format function to render the raw alias value.
+   */
+  function render($values) {
+    $field_alias = "cid{$this->definition['cid']}";
+    
+    $value = $values->$field_alias;
+    $formats = _views_calc_format_options();
+    $format = $formats[$this->definition['format']];
+    $tmp = explode(':', $format);
+    $function = trim($tmp[0]);
+    $vars     = count($tmp) == 2 ? $tmp[1] : '';
+    if ($function == 'custom') {
+      $tmp = explode(':', $this->definition['custom']);
+      $function = trim($tmp[0]);
+      $vars     = count($tmp) == 2 ? $tmp[1] : '';
+    }
+    if (empty($function) || $function == 'none') {
+      $function = 'check_plain';
+    }
+    $raw = $function($value, $vars);
+
+    // This needs to be set for the $this->render_link() to work. It would
+    // have been set in the query, if we hadn't bypassed the normal query.
+    // TODO there may be a better way to do this.
+    $this->aliases['nid'] = 'nid';
+
+    return $this->render_link($raw, $values);
+  }
+}
\ No newline at end of file