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288 lines
10 KiB
288 lines
10 KiB
<?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; |
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use yii\base\Widget; |
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use yii\helpers\Html; |
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/** |
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* Menu displays a multi-level menu using nested HTML lists. |
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* |
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* The main property of Menu is [[items]], which specifies the possible items in the menu. |
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* A menu item can contain sub-items which specify the sub-menu under that menu item. |
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* |
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* Menu checks the current route and request parameters to toggle certain menu items |
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* with active state. |
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* |
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* Note that Menu only renders the HTML tags about the menu. It does do any styling. |
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* You are responsible to provide CSS styles to make it look like a real menu. |
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* |
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* The following example shows how to use Menu: |
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* |
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* ~~~ |
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* // $this is the view object currently being used |
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* echo Menu::widget($this, array( |
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* 'items' => array( |
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* // Important: you need to specify url as 'controller/action', |
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* // not just as 'controller' even if default action is used. |
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* array('label' => 'Home', 'url' => array('site/index')), |
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* // 'Products' menu item will be selected as long as the route is 'product/index' |
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* array('label' => 'Products', 'url' => array('product/index'), 'items' => array( |
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* array('label' => 'New Arrivals', 'url' => array('product/index', 'tag' => 'new')), |
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* array('label' => 'Most Popular', 'url' => array('product/index', 'tag' => 'popular')), |
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* )), |
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* array('label' => 'Login', 'url' => array('site/login'), 'visible' => Yii::app()->user->isGuest), |
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* ), |
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* )); |
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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 should be an array of the following structure: |
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* |
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* - label: string, optional, specifies the menu item label. When [[encodeLabels]] is true, the label |
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* will be HTML-encoded. If the label is not specified, an empty string will be used. |
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* - url: string or array, optional, specifies the URL of the menu item. It will be processed by [[Html::url]]. |
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* When this is set, the actual menu item content will be generated using [[linkTemplate]]; |
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* otherwise, [[labelTemplate]] will be used. |
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* - visible: boolean, optional, whether this menu item is visible. Defaults to true. |
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* - items: array, optional, specifies the sub-menu items. Its format is the same as the parent items. |
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* - active: boolean, optional, whether this menu item is in active state (currently selected). |
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* If a menu item is active, its CSS class will be appended with [[activeCssClass]]. |
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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 [[url]]. For more details, please refer to [[isItemActive()]]. |
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* - template: string, optional, the template used to render the content of this menu item. |
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* The token `{url}` will be replaced by the URL associated with this menu item, |
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* and the token `{label}` will be replaced by the label of the menu item. |
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* If this option is not set, [[linkTemplate]] or [[labelTemplate]] will be used instead. |
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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 the body of a menu which is a link. |
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* In this template, the token `{url}` will be replaced with the corresponding link URL; |
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* while `{label}` will be replaced with the link text. |
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* This property will be overridden by the `template` option set in individual menu items via [[items]]. |
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*/ |
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public $linkTemplate = '<a href="{url}">{label}</a>'; |
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/** |
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* @var string the template used to render the body of a menu which is NOT a link. |
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* In this template, the token `{label}` will be replaced with the label of the menu item. |
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* This property will be overridden by the `template` option set in individual menu items via [[items]]. |
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*/ |
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public $labelTemplate = '{label}'; |
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/** |
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* @var string the template used to render a list of sub-menus. |
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* In this template, the token `{items}` will be replaced with the renderer sub-menu items. |
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*/ |
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public $submenuTemplate = "\n<ul>\n{items}\n</ul>\n"; |
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/** |
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* @var boolean whether the labels for menu items should be HTML-encoded. |
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*/ |
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public $encodeLabels = true; |
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/** |
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* @var string the CSS class to be appended to the active menu item. |
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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. |
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* @see isItemActive |
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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 [[activeCssClass]]. |
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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 has no visible child menu items. |
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*/ |
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public $hideEmptyItems = true; |
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/** |
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* @var array the HTML attributes for the menu's container tag. |
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*/ |
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public $options = 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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*/ |
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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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*/ |
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public $lastItemCssClass; |
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/** |
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* @var string the route used to determine if a menu item is active or not. |
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* If not set, it will use the route of the current request. |
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* @see params |
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* @see isItemActive |
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*/ |
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public $route; |
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/** |
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* @var array the parameters used to determine if a menu item is active or not. |
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* If not set, it will use `$_GET`. |
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* @see route |
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* @see isItemActive |
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*/ |
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public $params; |
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/** |
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* Renders the menu. |
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*/ |
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public function run() |
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{ |
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if ($this->route === null && Yii::$app->controller !== null) { |
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$this->route = Yii::$app->controller->getRoute(); |
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} |
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if ($this->params === null) { |
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$this->params = $_GET; |
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} |
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$items = $this->normalizeItems($this->items, $hasActiveChild); |
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echo Html::tag('ul', $this->renderItems($items), $this->options); |
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} |
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/** |
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* Recursively renders the menu items (without the container tag). |
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* @param array $items the menu items to be rendered recursively |
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* @return string the rendering result |
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*/ |
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protected function renderItems($items) |
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{ |
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$n = count($items); |
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$lines = array(); |
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foreach ($items as $i => $item) { |
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$options = isset($item['itemOptions']) ? $item['itemOptions'] : array(); |
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$class = array(); |
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if ($item['active']) { |
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$class[] = $this->activeCssClass; |
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} |
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if ($i === 0 && $this->firstItemCssClass !== null) { |
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$class[] = $this->firstItemCssClass; |
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} |
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if ($i === $n - 1 && $this->lastItemCssClass !== null) { |
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$class[] = $this->lastItemCssClass; |
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} |
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if (!empty($class)) { |
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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(' ', $class); |
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} |
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} |
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$menu = $this->renderItem($item); |
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if (!empty($item['items'])) { |
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$menu .= strtr($this->submenuTemplate, array( |
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'{items}' => $this->renderItems($item['items']), |
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)); |
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} |
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$lines[] = Html::tag('li', $menu, $options); |
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} |
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return implode("\n", $lines); |
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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 $item the menu item to be rendered. Please refer to [[items]] to see what data might be in the item. |
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* @return string the rendering result |
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*/ |
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protected function renderItem($item) |
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{ |
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if (isset($item['url'])) { |
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$template = isset($item['template']) ? $item['template'] : $this->linkTemplate; |
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return strtr($template, array( |
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'{url}' => Html::url($item['url']), |
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'{label}' => $item['label'], |
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)); |
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} else { |
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$template = isset($item['template']) ? $item['template'] : $this->labelTemplate; |
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return strtr($template, array( |
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'{label}' => $item['label'], |
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)); |
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} |
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} |
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/** |
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* Normalizes the [[items]] property to remove invisible items and activate certain items. |
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* @param array $items the items to be normalized. |
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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, &$active) |
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{ |
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foreach ($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->encodeLabels) { |
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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)) { |
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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 [[route]] and [[params]] match that specified in the `url` option of the menu item. |
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* When the `url` option of a menu item is specified in terms of an array, its first element is treated |
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* as the route for the item and the rest of the elements are the associated parameters. |
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* Only when its route and parameters match [[route]] and [[params]], respectively, will a menu item |
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* be considered active. |
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* @param array $item the menu item to be checked |
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* @return boolean whether the menu item is active |
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*/ |
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protected function isItemActive($item) |
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{ |
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if (isset($item['url']) && is_array($item['url']) && trim($item['url'][0], '/') === $this->route) { |
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unset($item['url']['#']); |
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if (count($item['url']) > 1) { |
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foreach (array_splice($item['url'], 1) as $name => $value) { |
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if (!isset($this->params[$name]) || $this->params[$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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