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<?php
/**
* CMenu class file.
*
* @author Jonah Turnquist <poppitypop@gmail.com>
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright 2008-2013 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CMenu displays a multi-level menu using nested HTML lists.
*
* The main property of CMenu is {@link items}, which specifies the possible items in the menu.
* A menu item has three main properties: visible, active and items. The "visible" property
* specifies whether the menu item is currently visible. The "active" property specifies whether
* the menu item is currently selected. And the "items" property specifies the child menu items.
*
* The following example shows how to use CMenu:
* <pre>
* $this->widget('zii.widgets.CMenu', array(
* 'items'=>array(
* // Important: you need to specify url as 'controller/action',
* // not just as 'controller' even if default action is used.
* array('label'=>'Home', 'url'=>array('site/index')),
* // 'Products' menu item will be selected no matter which tag parameter value is since it's not specified.
* array('label'=>'Products', 'url'=>array('product/index'), 'items'=>array(
* array('label'=>'New Arrivals', 'url'=>array('product/new', 'tag'=>'new')),
* array('label'=>'Most Popular', 'url'=>array('product/index', 'tag'=>'popular')),
* )),
* array('label'=>'Login', 'url'=>array('site/login'), 'visible'=>Yii::app()->user->isGuest),
* ),
* ));
* </pre>
*
*
* @author Jonah Turnquist <poppitypop@gmail.com>
* @author Qiang Xue <qiang.xue@gmail.com>
* @package zii.widgets
* @since 1.1
*/
class CMenu extends CWidget
{
/**
* @var array list of menu items. Each menu item is specified as an array of name-value pairs.
* Possible option names include the following:
* <ul>
* <li>label: string, optional, specifies the menu item label. When {@link encodeLabel} or own encodeLabel option is true, the label
* will be HTML-encoded. If the label is not specified, it defaults to an empty string.</li>
* <li>encodeLabel: boolean whether the label for menu item should be HTML-encoded.
* When this option is set, it will override the global setting {@link encodeLabel}. This option has been available since version 1.1.15.</li>
* <li>url: string or array, optional, specifies the URL of the menu item. It is passed to {@link CHtml::normalizeUrl}
* to generate a valid URL. If this is not set, the menu item will be rendered as a span text.</li>
* <li>visible: boolean, optional, whether this menu item is visible. Defaults to true.
* This can be used to control the visibility of menu items based on user permissions.</li>
* <li>items: array, optional, specifies the sub-menu items. Its format is the same as the parent items.</li>
* <li>active: boolean, optional, whether this menu item is in active state (currently selected).
* If a menu item is active and {@link activeClass} is not empty, its CSS class will be appended with {@link activeClass}.
* If this option is not set, the menu item will be set active automatically when the current request
* is triggered by {@link url}. Note that the GET parameters not specified in the 'url' option will be ignored.</li>
* <li>template: string, optional, the template used to render this menu item.
* When this option is set, it will override the global setting {@link itemTemplate}.
* Please see {@link itemTemplate} for more details. This option has been available since version 1.1.1.</li>
* <li>linkOptions: array, optional, additional HTML attributes to be rendered for the link or span tag of the menu item.</li>
* <li>itemOptions: array, optional, additional HTML attributes to be rendered for the container tag of the menu item.</li>
* <li>submenuOptions: array, optional, additional HTML attributes to be rendered for the container of the submenu if this menu item has one.
* When this option is set, the {@link submenuHtmlOptions} property will be ignored for this particular submenu.
* This option has been available since version 1.1.6.</li>
* </ul>
*/
public $items=array();
/**
* @var string the template used to render an individual menu item. In this template,
* the token "{menu}" will be replaced with the corresponding menu link or text.
* If this property is not set, each menu will be rendered without any decoration.
* This property will be overridden by the 'template' option set in individual menu items via {@items}.
* @since 1.1.1
*/
public $itemTemplate;
/**
* @var boolean whether the labels for menu items should be HTML-encoded. Defaults to true.
*/
public $encodeLabel=true;
/**
* @var string the CSS class to be appended to the active menu item. Defaults to 'active'.
* If empty, the CSS class of menu items will not be changed.
*/
public $activeCssClass='active';
/**
* @var boolean whether to automatically activate items according to whether their route setting
* matches the currently requested route. Defaults to true.
* @since 1.1.3
*/
public $activateItems=true;
/**
* @var boolean whether to activate parent menu items when one of the corresponding child menu items is active.
* The activated parent menu items will also have its CSS classes appended with {@link activeCssClass}.
* Defaults to false.
*/
public $activateParents=false;
/**
* @var boolean whether to hide empty menu items. An empty menu item is one whose 'url' option is not
* set and which doesn't contain visible child menu items. Defaults to true.
*/
public $hideEmptyItems=true;
/**
* @var array HTML attributes for the menu's root container tag
*/
public $htmlOptions=array();
/**
* @var array HTML attributes for the submenu's container tag.
*/
public $submenuHtmlOptions=array();
/**
* @var string the HTML element name that will be used to wrap the label of all menu links.
* For example, if this property is set as 'span', a menu item may be rendered as
* <li><a href="url"><span>label</span></a></li>
* This is useful when implementing menu items using the sliding window technique.
* Defaults to null, meaning no wrapper tag will be generated.
* @since 1.1.4
*/
public $linkLabelWrapper;
/**
* @var array HTML attributes for the links' wrap element specified in
* {@link linkLabelWrapper}.
* @since 1.1.13
*/
public $linkLabelWrapperHtmlOptions=array();
/**
* @var string the CSS class that will be assigned to the first item in the main menu or each submenu.
* Defaults to null, meaning no such CSS class will be assigned.
* @since 1.1.4
*/
public $firstItemCssClass;
/**
* @var string the CSS class that will be assigned to the last item in the main menu or each submenu.
* Defaults to null, meaning no such CSS class will be assigned.
* @since 1.1.4
*/
public $lastItemCssClass;
/**
* @var string the CSS class that will be assigned to every item.
* Defaults to null, meaning no such CSS class will be assigned.
* @since 1.1.9
*/
public $itemCssClass;
/**
* Initializes the menu widget.
* This method mainly normalizes the {@link items} property.
* If this method is overridden, make sure the parent implementation is invoked.
*/
public function init()
{
if(isset($this->htmlOptions['id']))
$this->id=$this->htmlOptions['id'];
else
$this->htmlOptions['id']=$this->id;
$route=$this->getController()->getRoute();
$this->items=$this->normalizeItems($this->items,$route,$hasActiveChild);
}
/**
* Calls {@link renderMenu} to render the menu.
*/
public function run()
{
$this->renderMenu($this->items);
}
/**
* Renders the menu items.
* @param array $items menu items. Each menu item will be an array with at least two elements: 'label' and 'active'.
* It may have three other optional elements: 'items', 'linkOptions' and 'itemOptions'.
*/
protected function renderMenu($items)
{
if(count($items))
{
echo CHtml::openTag('ul',$this->htmlOptions)."\n";
$this->renderMenuRecursive($items);
echo CHtml::closeTag('ul');
}
}
/**
* Recursively renders the menu items.
* @param array $items the menu items to be rendered recursively
*/
protected function renderMenuRecursive($items)
{
$count=0;
$n=count($items);
foreach($items as $item)
{
$count++;
$options=isset($item['itemOptions']) ? $item['itemOptions'] : array();
$class=array();
if($item['active'] && $this->activeCssClass!='')
$class[]=$this->activeCssClass;
if($count===1 && $this->firstItemCssClass!==null)
$class[]=$this->firstItemCssClass;
if($count===$n && $this->lastItemCssClass!==null)
$class[]=$this->lastItemCssClass;
if($this->itemCssClass!==null)
$class[]=$this->itemCssClass;
if($class!==array())
{
if(empty($options['class']))
$options['class']=implode(' ',$class);
else
$options['class'].=' '.implode(' ',$class);
}
echo CHtml::openTag('li', $options);
$menu=$this->renderMenuItem($item);
if(isset($this->itemTemplate) || isset($item['template']))
{
$template=isset($item['template']) ? $item['template'] : $this->itemTemplate;
echo strtr($template,array('{menu}'=>$menu));
}
else
echo $menu;
if(isset($item['items']) && count($item['items']))
{
echo "\n".CHtml::openTag('ul',isset($item['submenuOptions']) ? $item['submenuOptions'] : $this->submenuHtmlOptions)."\n";
$this->renderMenuRecursive($item['items']);
echo CHtml::closeTag('ul')."\n";
}
echo CHtml::closeTag('li')."\n";
}
}
/**
* Renders the content of a menu item.
* Note that the container and the sub-menus are not rendered here.
* @param array $item the menu item to be rendered. Please see {@link items} on what data might be in the item.
* @return string
* @since 1.1.6
*/
protected function renderMenuItem($item)
{
if(isset($item['url']))
{
$label=$this->linkLabelWrapper===null ? $item['label'] : CHtml::tag($this->linkLabelWrapper, $this->linkLabelWrapperHtmlOptions, $item['label']);
return CHtml::link($label,$item['url'],isset($item['linkOptions']) ? $item['linkOptions'] : array());
}
else
return CHtml::tag('span',isset($item['linkOptions']) ? $item['linkOptions'] : array(), $item['label']);
}
/**
* Normalizes the {@link items} property so that the 'active' state is properly identified for every menu item.
* @param array $items the items to be normalized.
* @param string $route the route of the current request.
* @param boolean $active whether there is an active child menu item.
* @return array the normalized menu items
*/
protected function normalizeItems($items,$route,&$active)
{
foreach($items as $i=>$item)
{
if(isset($item['visible']) && !$item['visible'])
{
unset($items[$i]);
continue;
}
if(!isset($item['label']))
$item['label']='';
$encodeLabel = isset($item['encodeLabel']) ? $item['encodeLabel'] : $this->encodeLabel;
if($encodeLabel)
$items[$i]['label']=CHtml::encode($item['label']);
$hasActiveChild=false;
if(isset($item['items']))
{
$items[$i]['items']=$this->normalizeItems($item['items'],$route,$hasActiveChild);
if(empty($items[$i]['items']) && $this->hideEmptyItems)
{
unset($items[$i]['items']);
if(!isset($item['url']))
{
unset($items[$i]);
continue;
}
}
}
if(!isset($item['active']))
{
if($this->activateParents && $hasActiveChild || $this->activateItems && $this->isItemActive($item,$route))
$active=$items[$i]['active']=true;
else
$items[$i]['active']=false;
}
elseif($item['active'])
$active=true;
}
return array_values($items);
}
/**
* Checks whether a menu item is active.
* This is done by checking if the currently requested URL is generated by the 'url' option
* of the menu item. Note that the GET parameters not specified in the 'url' option will be ignored.
* @param array $item the menu item to be checked
* @param string $route the route of the current request
* @return boolean whether the menu item is active
*/
protected function isItemActive($item,$route)
{
if(isset($item['url']) && is_array($item['url']) && !strcasecmp(trim($item['url'][0],'/'),$route))
{
unset($item['url']['#']);
if(count($item['url'])>1)
{
foreach(array_splice($item['url'],1) as $name=>$value)
{
if(!isset($_GET[$name]) || $_GET[$name]!=$value)
return false;
}
}
return true;
}
return false;
}
}