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<?php
/**
* @file
* Adds contextual links to perform actions related to elements on a page.
*/
/**
* Implements hook_help().
*/
function contextual_help($path, $arg) {
switch ($path) {
case 'admin/help#contextual':
$output = '';
$output .= '<h3>' . t('About') . '</h3>';
$output .= '<p>' . t('The Contextual links module displays links related to regions of pages on your site to users with <em>access contextual links</em> permission. For more information, see the online handbook entry for <a href="@contextual">Contextual links module</a>.', array('@contextual' => 'http://drupal.org/documentation/modules/contextual')) . '</p>';
$output .= '<h3>' . t('Uses') . '</h3>';
$output .= '<dl>';
$output .= '<dt>' . t('Displaying contextual links') . '</dt>';
$output .= '<dd>' . t('Contextual links are supplied by modules, to give you quick access to tasks associated with regions of pages on your site. For instance, if you have a custom menu block displayed in a sidebar of your site, the Blocks and Menus modules will supply links to configure the block and edit the menu. The Contextual links module collects these links into a list for display by your theme, and also adds JavaScript code to the page to hide the links initially, and display them when your mouse hovers over the block.') . '</dd>';
$output .= '</dl>';
return $output;
}
}
/**
* Implements hook_permission().
*/
function contextual_permission() {
return array(
'access contextual links' => array(
'title' => t('Use contextual links'),
'description' => t('Use contextual links to perform actions related to elements on a page.'),
),
);
}
/**
* Implements hook_library().
*/
function contextual_library() {
$path = drupal_get_path('module', 'contextual');
$libraries['contextual-links'] = array(
'title' => 'Contextual links',
'website' => 'http://drupal.org/node/473268',
'version' => '1.0',
'js' => array(
$path . '/contextual.js' => array(),
),
'css' => array(
$path . '/contextual.css' => array(),
),
);
return $libraries;
}
/**
* Implements hook_element_info().
*/
function contextual_element_info() {
$types['contextual_links'] = array(
'#pre_render' => array('contextual_pre_render_links'),
'#theme' => 'links__contextual',
'#links' => array(),
'#prefix' => '<div class="contextual-links-wrapper">',
'#suffix' => '</div>',
'#attributes' => array(
'class' => array('contextual-links'),
),
'#attached' => array(
'library' => array(
array('contextual', 'contextual-links'),
),
),
);
return $types;
}
/**
* Implements hook_preprocess().
*
* @see contextual_pre_render_links()
*/
function contextual_preprocess(&$variables, $hook) {
// Nothing to do here if the user is not permitted to access contextual links.
if (!user_access('access contextual links')) {
return;
}
$hooks = theme_get_registry(FALSE);
// Determine the primary theme function argument.
if (!empty($hooks[$hook]['variables'])) {
$keys = array_keys($hooks[$hook]['variables']);
$key = $keys[0];
}
elseif (!empty($hooks[$hook]['render element'])) {
$key = $hooks[$hook]['render element'];
}
if (!empty($key) && isset($variables[$key])) {
$element = $variables[$key];
}
if (isset($element) && is_array($element) && !empty($element['#contextual_links'])) {
// Initialize the template variable as a renderable array.
$variables['title_suffix']['contextual_links'] = array(
'#type' => 'contextual_links',
'#contextual_links' => $element['#contextual_links'],
'#element' => $element,
);
// Mark this element as potentially having contextual links attached to it.
$variables['classes_array'][] = 'contextual-links-region';
}
}
/**
* Build a renderable array for contextual links.
*
* @param $element
* A renderable array containing a #contextual_links property, which is a
* keyed array. Each key is the name of the implementing module, and each
* value is an array that forms the function arguments for
* menu_contextual_links(). For example:
* @code
* array('#contextual_links' => array(
* 'block' => array('admin/structure/block/manage', array('system', 'navigation')),
* 'menu' => array('admin/structure/menu/manage', array('navigation')),
* ))
* @endcode
*
* @return
* A renderable array representing contextual links.
*
* @see menu_contextual_links()
* @see contextual_element_info()
*/
function contextual_pre_render_links($element) {
// Retrieve contextual menu links.
$items = array();
foreach ($element['#contextual_links'] as $module => $args) {
$items += menu_contextual_links($module, $args[0], $args[1]);
}
// Transform contextual links into parameters suitable for theme_link().
$links = array();
foreach ($items as $class => $item) {
$class = drupal_html_class($class);
$links[$class] = array(
'title' => $item['title'],
'href' => $item['href'],
);
// @todo theme_links() should *really* use the same parameters as l().
$item['localized_options'] += array('query' => array());
$item['localized_options']['query'] += drupal_get_destination();
$links[$class] += $item['localized_options'];
}
$element['#links'] = $links;
// Allow modules to alter the renderable contextual links element.
drupal_alter('contextual_links_view', $element, $items);
// If there are no links, tell drupal_render() to abort rendering.
if (empty($element['#links'])) {
$element['#printed'] = TRUE;
}
return $element;
}
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