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Menu WIP

tags/2.0.0-beta
Qiang Xue 12 years ago
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  1. 282
      framework/widgets/Menu.php

282
framework/widgets/Menu.php
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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\widgets;
use yii\base\Widget;
use yii\helpers\Html;
/**
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class Menu extends Widget
{
/**
* @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} is true, the label
* will be HTML-encoded. If the label is not specified, it defaults to an empty string.</li>
* <li>url: string or array, optional, specifies the URL of the menu item. It is passed to {@link Html::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 $options = 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
* &lt;li&gt;&lt;a href="url"&gt;&lt;span&gt;label&lt;/span&gt;&lt;/a&gt;&lt;/li&gt;
* 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()
{
$route = $this->getController()->getRoute();
$this->items = $this->normalizeItems($this->items, $route, $hasActiveChild);
}
/**
* Calls {@link renderMenu} to render the menu.
*/
public function run()
{
if (count($this->items)) {
echo Html::beginTag('ul', $this->options) . "\n";
$this->renderItems($this->items);
echo Html::endTag('ul');
}
}
/**
* Recursively renders the menu items.
* @param array $items the menu items to be rendered recursively
*/
protected function renderItems($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 Html::beginTag('li', $options);
$menu = $this->renderItem($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($item['items'])) {
echo "\n" . Html::beginTag('ul', isset($item['submenuOptions']) ? $item['submenuOptions'] : $this->submenuHtmlOptions) . "\n";
$this->renderItems($item['items']);
echo Html::endTag('ul') . "\n";
}
echo Html::endTag('li') . "\n";
}
}
/**
* Renders the content of a menu item.
* Note that the container and the sub-menus are not rendered here.
* @param array $item the menu item to be rendered. Please see {@link items} on what data might be in the item.
* @return string
* @since 1.1.6
*/
protected function renderItem($item)
{
if (isset($item['url'])) {
$label = $this->linkLabelWrapper === null ? $item['label'] : Html::tag($this->linkLabelWrapper, $this->linkLabelWrapperHtmlOptions, $item['label']);
return Html::a($label, $item['url'], isset($item['linkOptions']) ? $item['linkOptions'] : array());
} else {
return Html::tag('span', isset($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'])) {
$item['label'] = '';
}
if ($this->encodeLabel) {
$items[$i]['label'] = Html::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;
}
}
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