/[drupal]/contributions/themes/art4_blue/template.php
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revision 1.1, Tue Aug 14 19:15:02 2007 UTC revision 1.2, Wed Aug 15 23:10:13 2007 UTC
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1    <?php
2    
3    /**
4     * ABOUT
5     *
6     *  The template.php file is one of the most useful files when creating or modifying Drupal themes.
7     *  You can add new regions for block content, modify or override Drupal's theme functions,
8     *  intercept or make additional variables available to your theme, and create custom PHP logic.
9     *  For more information, please visit the Theme Developer's Guide on Drupal.org:
10     *  http://drupal.org/node/509
11     */
12    
13    
14    /**
15    * MODIFYING OR CREATING REGIONS
16    *
17    * Regions are areas in your theme where you can place blocks.
18    * The default regions used in themes  are "left sidebar", "right sidebar", "header", and "footer",  although you can create
19    * as many regions as you want.  Once declared, they are made available to the page.tpl.php file as a variable.
20    * For instance, we use <?php print $header ?> for the placement of the "header" region in page.tpl.php.
21    *
22    * By going to  the administer > site building > blocks page you can choose which regions various blocks should be placed.
23    * New regions you define here will automatically show up in the drop-down list by their human readable name.
24     */
25    
26    
27    /**
28     * Declare the available regions implemented by this engine.
29     *
30     * @return
31     *    An array of regions.  The first array element will be used as the default region for themes.
32     *    Each array element takes the format: variable_name => t('human readable name')
33     */
34    function bluebreeze_regions() {
35      return array(
36           'left' => t('left sidebar'),
37           'right' => t('right sidebar'),
38           'content_top' => t('content top'),
39           'content_bottom' => t('content bottom'),
40           'header' => t('header'),
41           'footer' => t('footer')
42      );
43    }
44    
45    /**
46     * OVERRIDING THEME FUNCTIONS
47     *
48     *  The Drupal theme system uses special theme functions to generate HTML output automatically.
49     *  Often we wish to customize this HTML output.  To do this, we have to override the theme function.
50     *  You have to first find the theme function that generates the output, and then "catch" it and modify it here.
51     *  The easiest way to do it is to copy the original function in its entirety and paste it here, changing
52     *  the prefix from theme_ to zen_.  For example:
53     *
54     *   original:  theme_breadcrumb()
55     *   theme override:   bluebreeze_breadcrumb()
56     *
57     *  See the following example. In this theme, we want to change all of the breadcrumb separator links from  >> to ::
58     *
59     */
60    
61    /**
62      * Return a themed breadcrumb trail.
63      *
64      * @param $breadcrumb
65      *   An array containing the breadcrumb links.
66      * @return a string containing the breadcrumb output.
67      */
68    /* function bluebreeze_breadcrumb($breadcrumb) {
69       if (!empty($breadcrumb)) {
70         return '<div class="breadcrumb">'. implode(' :: ', $breadcrumb) .'</div>';
71       }
72     } */
73    
74    
75    /**
76     * CREATE OR MODIFY VARIABLES FOR YOUR THEME
77     *
78     *  The most powerful function available to themers is the _phptemplate_variables() function. It allows you
79     *  to pass newly created variables to different template (tpl.php) files in your theme. Or even unset ones you don't want
80     *  to use.
81     *
82     *  It works by switching on the hook, or name of the theme function, such as:
83     *    - page
84     *    - node
85     *    - comment
86     *    - block
87     *
88     * By switching on this hook you can send different variables to page.tpl.php file, node.tpl.php
89     * (and any other derivative node template file, like node-forum.tpl.php), comment.tpl.php, and block.tpl.php
90     *
91     */
92    
93    
94    /**
95     * Intercept template variables
96     *
97     * @param $hook
98     *   The name of the theme function being executed
99     * @param $vars
100     *   A sequential array of variables passed to the theme function.
101     */
102    
103    function _phptemplate_variables($hook, $vars = array()) {
104      switch ($hook) {
105        // Send a new variable, $has_terms, to see wether the current node has any terms
106        case 'node':
107          if(count(taxonomy_node_get_terms($vars['node']->nid)))
108            $vars['has_terms'] = TRUE;
109          else
110            $vars['has_terms'] = FALSE;
111      }
112    
113      return $vars;
114    }
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