1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
<?php
/**
* Implements of hook_views_api().
*/
function views_tree_views_api() {
return array(
'api' => '3.0-alpha1',
'path' => drupal_get_path('module', 'views_tree'),
);
}
/**
* Implements of hook_theme().
*/
function views_tree_theme($existing, $type, $theme, $path) {
return array(
'views_tree' => array(
'variables' => array(
'view' => NULL,
'options' => array(),
'rows' => array(),
'title' => NULL,
),
),
'views_tree_inner' => array(
'variables' => array(
'view' => NULL,
'options' => array(),
'rows' => array(),
'title' => NULL,
'result' => array(),
'parent' => NULL,
),
),
);
}
/**
* Theme function for the tree style plugin.
*
* We need to do some weirdness that makes more sense as a theme function
* than as a template.
*
* @ingroup themeable
* @link http://drupal.org/node/355919
*/
function theme_views_tree($variables) {
$view = $variables['view'];
$options = $variables['options'];
$rows = $variables['rows'];
$title = $variables['title'];
$result = $view->result;
$fields = &$view->field;
$parents = array();
if (! $fields[$options['main_field']] instanceof views_handler_field) {
drupal_set_message(t('Main field is invalid: %field', array('%field' => $options['main_field'])), 'error');
return '';
}
if (! $fields[$options['parent_field']] instanceof views_handler_field) {
drupal_set_message(t('Parent field is invalid: %field', array('%field' => $options['parent_field'])), 'error');
return '';
}
// The field structure of Field API fields in a views result object is...
// ridiculous. To avoid having to deal with it, we'll first iterate over all
// records and normalize out the main and parent IDs to new properties. That
// vastly simplifies the code that follows. This particular magic
// incantation extracts the value from each record for the appropriate field
// specified by the user. It then normalizes that value down to just an int,
// even though in some cases it is an array. See views_tree_normalize_key().
// Finally, we build up a list of all main keys in the result set so that
// we can normalize top-level records below.
foreach ($result as $i => $record) {
$result[$i]->views_tree_main = views_tree_normalize_key($fields[$options['main_field']]->get_value($record), $fields[$options['main_field']]);
$result[$i]->views_tree_parent = views_tree_normalize_key($fields[$options['parent_field']]->get_value($record), $fields[$options['parent_field']]);
$parents[] = $record->views_tree_main;
}
// Normalize the top level of records to all point to 0 as their parent
// We only have to do this once, so we do it here in the wrapping function.
foreach ($result as $i => $record) {
if (! in_array($record->views_tree_parent, $parents)) {
$result[$i]->views_tree_parent = 0;
}
}
// Recursively render each item.
$tree = theme('views_tree_inner', array(
'view' => $view,
'options' => $options,
'rows' => $rows,
'title' => $title,
'result' => $result,
'parent' => 0,
)
);
return $title . $tree;
}
/**
* Inner recursive theme function for views tree theming.
*
* @ingroup themeable
* @param $view
* @param $options
* @param $row
* @param $title
* @param $result
* An array representing the raw data returned from the query.
* @param $parent
* The id of the parent entry in the call stack.
*/
function theme_views_tree_inner($variables) {
$view = $variables['view'];
$options = $variables['options'];
$rows = $variables['rows'];
$title = $variables['title'];
$result = $variables['result'];
$parent = $variables['parent'];
$items = array();
foreach ($result as $i => $record) {
if ($record->views_tree_parent == $parent) {
$variables['parent'] = $record->views_tree_main;
$items[] = $rows[$i] . call_user_func(__FUNCTION__, $variables);
}
}
return count($items) ? theme('item_list', array('items' => $items, 'type' => $options['type'])) : '';
}
/**
* Normalize a value out of the record to an int.
*
* If the field in question comes from Field API, then it will be an array, not
* an int. We need to detect that and extract the int value we want from it.
* Note that because Field API structures are so free-form, we have to specifically
* support each field type. For right now we support entityreference (target_id),
* nodereference (nid), userreference (uid), and taxonomyreference (tid).
*
* @param mixed $value
* The value to normalize. It should be either an int or an array. If an int,
* it is returned unaltered. If it's an array, we extract the int we want
* and return that.
* @param views_handler_field $field
* Metadata about the field we are extracting information from.
* @return int
* The value of this key, normalized to an int.
*/
function views_tree_normalize_key($value, views_handler_field $field) {
if (is_array($value) && count($value)) {
if (isset($field->field_info['columns'])) {
$columns = array_keys($field->field_info['columns']);
foreach ($columns as $column) {
if (in_array($column, array('target_id', 'nid', 'uid', 'tid'))) {
$field_property = $column;
break;
}
}
}
else {
$field_property = '';
}
return $field_property ? $value[0][$field_property] : 0;
}
else {
return $value ? $value : 0;
}
}
|
