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283 lines
10 KiB
283 lines
10 KiB
12 years ago
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<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\widgets;
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use yii\base\Widget;
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use yii\helpers\Html;
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/**
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class Menu extends Widget
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{
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/**
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* @var array list of menu items. Each menu item is specified as an array of name-value pairs.
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* Possible option names include the following:
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* <ul>
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* <li>label: string, optional, specifies the menu item label. When {@link encodeLabel} is true, the label
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* will be HTML-encoded. If the label is not specified, it defaults to an empty string.</li>
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* <li>url: string or array, optional, specifies the URL of the menu item. It is passed to {@link Html::normalizeUrl}
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* to generate a valid URL. If this is not set, the menu item will be rendered as a span text.</li>
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* <li>visible: boolean, optional, whether this menu item is visible. Defaults to true.
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* This can be used to control the visibility of menu items based on user permissions.</li>
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* <li>items: array, optional, specifies the sub-menu items. Its format is the same as the parent items.</li>
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* <li>active: boolean, optional, whether this menu item is in active state (currently selected).
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* If a menu item is active and {@link activeClass} is not empty, its CSS class will be appended with {@link activeClass}.
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* If this option is not set, the menu item will be set active automatically when the current request
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* is triggered by {@link url}. Note that the GET parameters not specified in the 'url' option will be ignored.</li>
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* <li>template: string, optional, the template used to render this menu item.
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* When this option is set, it will override the global setting {@link itemTemplate}.
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* Please see {@link itemTemplate} for more details. This option has been available since version 1.1.1.</li>
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* <li>linkOptions: array, optional, additional HTML attributes to be rendered for the link or span tag of the menu item.</li>
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* <li>itemOptions: array, optional, additional HTML attributes to be rendered for the container tag of the menu item.</li>
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* <li>submenuOptions: array, optional, additional HTML attributes to be rendered for the container of the submenu if this menu item has one.
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* When this option is set, the {@link submenuHtmlOptions} property will be ignored for this particular submenu.
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* This option has been available since version 1.1.6.</li>
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* </ul>
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*/
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public $items = array();
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/**
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* @var string the template used to render an individual menu item. In this template,
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* the token "{menu}" will be replaced with the corresponding menu link or text.
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* If this property is not set, each menu will be rendered without any decoration.
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* This property will be overridden by the 'template' option set in individual menu items via {@items}.
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* @since 1.1.1
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*/
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public $itemTemplate;
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/**
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* @var boolean whether the labels for menu items should be HTML-encoded. Defaults to true.
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*/
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public $encodeLabel = true;
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/**
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* @var string the CSS class to be appended to the active menu item. Defaults to 'active'.
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* If empty, the CSS class of menu items will not be changed.
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*/
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public $activeCssClass = 'active';
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/**
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* @var boolean whether to automatically activate items according to whether their route setting
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* matches the currently requested route. Defaults to true.
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* @since 1.1.3
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*/
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public $activateItems = true;
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/**
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* @var boolean whether to activate parent menu items when one of the corresponding child menu items is active.
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* The activated parent menu items will also have its CSS classes appended with {@link activeCssClass}.
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* Defaults to false.
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*/
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public $activateParents = false;
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/**
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* @var boolean whether to hide empty menu items. An empty menu item is one whose 'url' option is not
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* set and which doesn't contain visible child menu items. Defaults to true.
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*/
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public $hideEmptyItems = true;
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/**
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* @var array HTML attributes for the menu's root container tag
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*/
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public $options = array();
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/**
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* @var array HTML attributes for the submenu's container tag.
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*/
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public $submenuHtmlOptions = array();
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/**
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* @var string the HTML element name that will be used to wrap the label of all menu links.
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* For example, if this property is set as 'span', a menu item may be rendered as
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* <li><a href="url"><span>label</span></a></li>
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* This is useful when implementing menu items using the sliding window technique.
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* Defaults to null, meaning no wrapper tag will be generated.
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* @since 1.1.4
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*/
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public $linkLabelWrapper;
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/**
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* @var array HTML attributes for the links' wrap element specified in
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* {@link linkLabelWrapper}.
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* @since 1.1.13
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*/
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public $linkLabelWrapperHtmlOptions = array();
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/**
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* @var string the CSS class that will be assigned to the first item in the main menu or each submenu.
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* Defaults to null, meaning no such CSS class will be assigned.
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* @since 1.1.4
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*/
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public $firstItemCssClass;
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/**
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* @var string the CSS class that will be assigned to the last item in the main menu or each submenu.
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* Defaults to null, meaning no such CSS class will be assigned.
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* @since 1.1.4
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*/
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public $lastItemCssClass;
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/**
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* @var string the CSS class that will be assigned to every item.
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* Defaults to null, meaning no such CSS class will be assigned.
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* @since 1.1.9
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*/
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public $itemCssClass;
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/**
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* Initializes the menu widget.
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* This method mainly normalizes the {@link items} property.
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* If this method is overridden, make sure the parent implementation is invoked.
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*/
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public function init()
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{
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$route = $this->getController()->getRoute();
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$this->items = $this->normalizeItems($this->items, $route, $hasActiveChild);
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}
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/**
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* Calls {@link renderMenu} to render the menu.
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*/
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public function run()
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{
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if (count($this->items)) {
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echo Html::beginTag('ul', $this->options) . "\n";
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$this->renderItems($this->items);
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echo Html::endTag('ul');
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}
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}
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/**
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* Recursively renders the menu items.
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* @param array $items the menu items to be rendered recursively
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*/
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protected function renderItems($items)
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{
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$count = 0;
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$n = count($items);
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foreach ($items as $item) {
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$count++;
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$options = isset($item['itemOptions']) ? $item['itemOptions'] : array();
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$class = array();
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if ($item['active'] && $this->activeCssClass != '') {
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$class[] = $this->activeCssClass;
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}
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if ($count === 1 && $this->firstItemCssClass !== null) {
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$class[] = $this->firstItemCssClass;
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}
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if ($count === $n && $this->lastItemCssClass !== null) {
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$class[] = $this->lastItemCssClass;
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}
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if ($this->itemCssClass !== null) {
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$class[] = $this->itemCssClass;
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}
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if ($class !== array()) {
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if (empty($options['class'])) {
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$options['class'] = implode(' ', $class);
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} else {
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$options['class'] .= ' ' . implode(' ', $class);
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}
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}
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echo Html::beginTag('li', $options);
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$menu = $this->renderItem($item);
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if (isset($this->itemTemplate) || isset($item['template'])) {
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$template = isset($item['template']) ? $item['template'] : $this->itemTemplate;
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echo strtr($template, array('{menu}' => $menu));
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} else {
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echo $menu;
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}
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if (isset($item['items']) && count($item['items'])) {
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echo "\n" . Html::beginTag('ul', isset($item['submenuOptions']) ? $item['submenuOptions'] : $this->submenuHtmlOptions) . "\n";
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$this->renderItems($item['items']);
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echo Html::endTag('ul') . "\n";
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}
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echo Html::endTag('li') . "\n";
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}
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}
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/**
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* Renders the content of a menu item.
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* Note that the container and the sub-menus are not rendered here.
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* @param array $item the menu item to be rendered. Please see {@link items} on what data might be in the item.
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* @return string
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* @since 1.1.6
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*/
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protected function renderItem($item)
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{
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if (isset($item['url'])) {
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$label = $this->linkLabelWrapper === null ? $item['label'] : Html::tag($this->linkLabelWrapper, $this->linkLabelWrapperHtmlOptions, $item['label']);
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return Html::a($label, $item['url'], isset($item['linkOptions']) ? $item['linkOptions'] : array());
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} else {
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return Html::tag('span', isset($item['linkOptions']) ? $item['linkOptions'] : array(), $item['label']);
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}
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}
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/**
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* Normalizes the {@link items} property so that the 'active' state is properly identified for every menu item.
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* @param array $items the items to be normalized.
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* @param string $route the route of the current request.
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* @param boolean $active whether there is an active child menu item.
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* @return array the normalized menu items
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*/
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protected function normalizeItems($items, $route, &$active)
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{
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foreach ($items as $i => $item) {
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if (isset($item['visible']) && !$item['visible']) {
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unset($items[$i]);
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continue;
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}
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if (!isset($item['label'])) {
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$item['label'] = '';
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}
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if ($this->encodeLabel) {
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$items[$i]['label'] = Html::encode($item['label']);
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}
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$hasActiveChild = false;
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if (isset($item['items'])) {
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$items[$i]['items'] = $this->normalizeItems($item['items'], $route, $hasActiveChild);
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if (empty($items[$i]['items']) && $this->hideEmptyItems) {
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unset($items[$i]['items']);
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if (!isset($item['url'])) {
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unset($items[$i]);
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continue;
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}
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}
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}
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if (!isset($item['active'])) {
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if ($this->activateParents && $hasActiveChild || $this->activateItems && $this->isItemActive($item, $route)) {
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$active = $items[$i]['active'] = true;
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} else {
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$items[$i]['active'] = false;
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}
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} elseif ($item['active']) {
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$active = true;
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}
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}
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return array_values($items);
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}
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/**
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* Checks whether a menu item is active.
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* This is done by checking if the currently requested URL is generated by the 'url' option
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* of the menu item. Note that the GET parameters not specified in the 'url' option will be ignored.
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* @param array $item the menu item to be checked
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* @param string $route the route of the current request
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* @return boolean whether the menu item is active
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*/
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protected function isItemActive($item, $route)
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{
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if (isset($item['url']) && is_array($item['url']) && !strcasecmp(trim($item['url'][0], '/'), $route)) {
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unset($item['url']['#']);
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if (count($item['url']) > 1) {
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foreach (array_splice($item['url'], 1) as $name => $value) {
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if (!isset($_GET[$name]) || $_GET[$name] != $value) {
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return false;
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}
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}
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}
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return true;
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}
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return false;
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}
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}
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