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<?php |
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/** |
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* @package fi.protie.navigation |
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* @author The Midgard Project, http://www.midgard-project.org |
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* @copyright The Midgard Project, http://www.midgard-project.org |
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* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License |
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*/ |
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/** |
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* Versatile class for drawing dynamically navigation elements according to |
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* user preferences. |
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* |
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* <code> |
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* // Initializes the class |
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* $navigation = new fi_protie_navigation(); |
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* |
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* // Display only nodes (folders) |
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* $navigation->list_leaves = false; |
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* |
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* // Expand the whole site tree instead of the active path |
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* $navigation->follow_all = true; |
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* |
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* // Skip 1 level from the beginning of the active path |
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* $navigation->skip_levels = 1; |
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* |
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* // Finally draw the navigation |
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* $navigation->draw(); |
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* </code> |
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* |
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* See the attributes of this class for additional customizing options. |
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* |
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* @package fi.protie.navigation |
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*/ |
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class fi_protie_navigation |
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{ |
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/** |
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* MidCOM helper class for navigation subsystem. Uses class 'midcom.helper.nav' |
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*/ |
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private midcom_helper_nav $_nap; |
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/** |
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* Stores the navigation access point history or in other words path to the current point. |
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*/ |
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private array $node_path = []; |
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/** |
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* ID for the folder to get the navigation |
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*/ |
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public ?int $root_id = null; |
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/** |
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* Number of the parsed level |
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*/ |
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private int $_level = 1; |
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/** |
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* The amount of lowest level elements to be skipped. |
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*/ |
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public int $skip_levels = 0; |
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/** |
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* Switch to determine if navigation should display leaves or pages. |
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*/ |
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public bool $list_leaves = true; |
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/** |
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* List only the leaf elements or pages |
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*/ |
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public bool $list_nodes = true; |
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/** |
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* Switch to determine if navigation should follow node path (on true) or stop on the |
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* spot. |
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*/ |
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public bool $follow_selected = true; |
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/** |
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* Switch to determine if navigation should follow all the nodes or only the current |
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*/ |
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public bool $follow_all = false; |
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/** |
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* Restrict the amount of levels listed. |
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*/ |
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public int $list_levels = 0; |
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/** |
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* ID of the root level list object |
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*/ |
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public ?string $root_object_id = null; |
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/** |
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* CSS class for styling the lists |
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*/ |
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public string $css_list_style = 'fi_protie_navigation'; |
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/** |
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* Add component name to list item ul class name |
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*/ |
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public bool $component_name_to_class = false; |
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/** |
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* Check if item has children and if so, add node/leaf class to list item |
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*/ |
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public bool $has_children_to_class = false; |
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/** |
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* Should the object's status be added to list item ul class names |
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* Since this forces us to load the entire object, set it to false if you don't need it |
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*/ |
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public bool $object_status_to_class = false; |
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/** |
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* CSS class for nodes |
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*/ |
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public string $css_node = 'node'; |
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/** |
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* CSS class for leaves |
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*/ |
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public string $css_leaf = 'leaf'; |
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/** |
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* CSS class for the elements in node path. All the elements in node path will have this class. |
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*/ |
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public string $css_selected = 'selected'; |
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/** |
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* CSS class for the current, active node or leaf. There can be only one active element. |
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*/ |
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public string $css_active = 'active'; |
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/** |
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* CSS class for links |
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*/ |
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public string $css_link = 'link'; |
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/** |
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* Here we initialize the classes and variables needed through the class. |
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*/ |
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public function __construct(?int $id = null) |
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{ |
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$this->_nap = new midcom_helper_nav(); |
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$this->get_node_path(); |
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if ($id !== null) { |
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$this->root_id = $id; |
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} |
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} |
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/** |
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* Traverses through the node path to fetch the location of the current navigation access point. |
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*/ |
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private function get_node_path() |
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{ |
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// Get nodes |
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$this->node_path = $this->_nap->get_node_path(); |
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// If NAP offers a leaf it should be stored in the node path |
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if ($leaf = $this->_nap->get_current_leaf()) { |
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$this->node_path[] = $leaf; |
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} |
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} |
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/** |
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* Traverse the child elements starting from the requested node id |
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*/ |
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private function _list_child_elements(int $id) |
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{ |
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if (!$this->list_leaves) { |
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$children = $this->_nap->get_nodes($id); |
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} elseif (!$this->list_nodes) { |
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$children = $this->_nap->get_leaves($id); |
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} else { |
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$children = $this->_nap->list_child_elements($id); |
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} |
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// Stop traversing the path if there are no children |
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if (!$children) { |
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return; |
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} |
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// Add ID property to the first unordered list ever called |
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$element_id = ''; |
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if ($this->root_object_id) { |
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$element_id = " id=\"{$this->root_object_id}\""; |
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$this->root_object_id = null; |
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} |
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echo "<ul class=\"{$this->css_list_style} node-{$id}\"{$element_id}>"; |
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// Draw each child element |
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foreach ($children as $child) { |
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$this->_display_element($child); |
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} |
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echo "</ul>"; |
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} |
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private function _get_css_classes(array $item) : string |
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{ |
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$classes = []; |
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if ($item[MIDCOM_NAV_TYPE] === 'node') { |
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if ( $item[MIDCOM_NAV_ID] === $this->_nap->get_current_node() |
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&& ( !$this->_nap->get_current_leaf() |
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|| !$this->_nap->get_leaf($this->_nap->get_current_leaf()))) { |
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$classes[] = $this->css_active; |
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} |
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if (in_array($item[MIDCOM_NAV_ID], $this->node_path, true)) { |
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$classes[] = $this->css_selected; |
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} |
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if ($this->component_name_to_class) { |
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$classes[] = str_replace('.', '_', $item[MIDCOM_NAV_COMPONENT]); |
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} |
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} elseif ($item[MIDCOM_NAV_ID] === $this->_nap->get_current_leaf()) { |
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// Place the corresponding css class for the currently active leaf) |
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$classes[] = $this->css_active; |
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$classes[] = $this->css_selected; |
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} |
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if ($this->has_children_to_class) { |
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if (!$this->list_leaves) { |
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$children = $this->_nap->get_nodes($item[MIDCOM_NAV_ID]); |
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} elseif ($item[MIDCOM_NAV_TYPE] == 'node') { |
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$children = $this->_nap->list_child_elements($item[MIDCOM_NAV_ID]); |
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} else { |
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$children = false; |
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} |
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$classes[] = $children ? $this->css_node : $this->css_leaf; |
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} |
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// Add information about the object's status |
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if ( $this->object_status_to_class |
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&& isset($item[MIDCOM_NAV_OBJECT]) |
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&& $css_status_class = midcom::get()->metadata->get_object_classes($item[MIDCOM_NAV_OBJECT])) { |
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$classes[] = $css_status_class; |
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} |
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return implode(' ', $classes); |
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} |
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private function _display_element(array $item) |
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{ |
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$css_classes = $this->_get_css_classes($item); |
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// Finalize the class naming |
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$class = ($css_classes !== '') ? ' class="' . $css_classes . '"' : ''; |
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$link_class = $this->css_link ? ' class="' . $this->css_link . '"' : ''; |
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echo "<li{$class}>"; |
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echo "<a href=\"{$item[MIDCOM_NAV_ABSOLUTEURL]}\"{$link_class}>" . htmlspecialchars($item[MIDCOM_NAV_NAME]) . "</a>"; |
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// If either of the follow nodes switches is on, follow all the nodes |
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if ( $item[MIDCOM_NAV_TYPE] === 'node' |
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&& ( $this->list_levels === 0 |
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|| $this->_level < $this->list_levels)) { |
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if ( $this->follow_all |
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|| ( $this->follow_selected |
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&& in_array($item[MIDCOM_NAV_ID], $this->node_path, true))) { |
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$this->_level++; |
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$this->_list_child_elements($item[MIDCOM_NAV_ID]); |
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$this->_level--; |
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} |
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} |
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echo "</li>"; |
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} |
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/** |
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* Draw the navigation. |
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*/ |
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public function draw() |
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{ |
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if (!$this->list_leaves && !$this->list_nodes) { |
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return; |
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} |
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if (!$this->root_id) { |
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$this->root_id = $this->_nap->get_root_node(); |
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} |
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if ($this->skip_levels !== 0) { |
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if (!array_key_exists($this->skip_levels, $this->node_path)) { |
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return; |
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} |
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$this->root_id = $this->node_path[$this->skip_levels]; |
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} |
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$this->_list_child_elements($this->root_id); |
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} |
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/** |
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* Set the root element id |
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* |
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* @param string $id root ul id |
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*/ |
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public function set_root_element_id(string $id) |
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{ |
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$this->root_object_id = $id; |
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} |
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} |
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In PHP, under loose comparison (like
==, or!=, orswitchconditions), values of different types might be equal.For
integervalues, zero is a special case, in particular the following results might be unexpected: