<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\View\Helper\Navigation;
use RecursiveIteratorIterator;
use Zend\Navigation\AbstractContainer;
use Zend\Navigation\Page\AbstractPage;
use Zend\View;
use Zend\View\Exception;
/**
* Helper for rendering menus from navigation containers
*/
class Menu extends AbstractHelper
{
/**
* Whether page class should be applied to <li> element
*
* @var bool
*/
protected $addClassToListItem = false;
/**
* Whether labels should be escaped
*
* @var bool
*/
protected $escapeLabels = true;
/**
* Whether only active branch should be rendered
*
* @var bool
*/
protected $onlyActiveBranch = false;
/**
* Partial view script to use for rendering menu
*
* @var string|array
*/
protected $partial = null;
/**
* Whether parents should be rendered when only rendering active branch
*
* @var bool
*/
protected $renderParents = true;
/**
* CSS class to use for the ul element
*
* @var string
*/
protected $ulClass = 'navigation';
/**
* View helper entry point:
* Retrieves helper and optionally sets container to operate on
*
* @param AbstractContainer $container [optional] container to operate on
* @return Menu
*/
public function __invoke($container = null)
{
if (null !== $container) {
$this->setContainer($container);
}
return $this;
}
/**
* Renders menu
*
* Implements {@link HelperInterface::render()}.
*
* If a partial view is registered in the helper, the menu will be rendered
* using the given partial script. If no partial is registered, the menu
* will be rendered as an 'ul' element by the helper's internal method.
*
* @see renderPartial()
* @see renderMenu()
*
* @param AbstractContainer $container [optional] container to render. Default is
* to render the container registered in the helper.
* @return string
*/
public function render($container = null)
{
$partial = $this->getPartial();
if ($partial) {
return $this->renderPartial($container, $partial);
}
return $this->renderMenu($container);
}
/**
* Renders the deepest active menu within [$minDepth, $maxDepth], (called
* from {@link renderMenu()})
*
* @param AbstractContainer $container container to render
* @param string $ulClass CSS class for first UL
* @param string $indent initial indentation
* @param int|null $minDepth minimum depth
* @param int|null $maxDepth maximum depth
* @param bool $escapeLabels Whether or not to escape the labels
* @param bool $addClassToListItem Whether or not page class applied to <li> element
* @return string
*/
protected function renderDeepestMenu(
AbstractContainer $container,
$ulClass,
$indent,
$minDepth,
$maxDepth,
$escapeLabels,
$addClassToListItem
) {
if (!$active = $this->findActive($container, $minDepth - 1, $maxDepth)) {
return '';
}
// special case if active page is one below minDepth
if ($active['depth'] < $minDepth) {
if (!$active['page']->hasPages()) {
return '';
}
} elseif (!$active['page']->hasPages()) {
// found pages has no children; render siblings
$active['page'] = $active['page']->getParent();
} elseif (is_int($maxDepth) && $active['depth'] +1 > $maxDepth) {
// children are below max depth; render siblings
$active['page'] = $active['page']->getParent();
}
$ulClass = $ulClass ? ' class="' . $ulClass . '"' : '';
$html = $indent . '<ul' . $ulClass . '>' . self::EOL;
foreach ($active['page'] as $subPage) {
if (!$this->accept($subPage)) {
continue;
}
// render li tag and page
$liClasses = array();
// Is page active?
if ($subPage->isActive(true)) {
$liClasses[] = 'active';
}
// Add CSS class from page to <li>
if ($addClassToListItem && $subPage->getClass()) {
$liClasses[] = $subPage->getClass();
}
$liClass = empty($liClasses) ? '' : ' class="' . implode(' ', $liClasses) . '"';
$html .= $indent . ' <li' . $liClass . '>' . self::EOL;
$html .= $indent . ' ' . $this->htmlify($subPage, $escapeLabels, $addClassToListItem) . self::EOL;
$html .= $indent . ' </li>' . self::EOL;
}
$html .= $indent . '</ul>';
return $html;
}
/**
* Renders helper
*
* Renders a HTML 'ul' for the given $container. If $container is not given,
* the container registered in the helper will be used.
*
* Available $options:
*
*
* @param AbstractContainer $container [optional] container to create menu from.
* Default is to use the container retrieved
* from {@link getContainer()}.
* @param array $options [optional] options for controlling rendering
* @return string
*/
public function renderMenu($container = null, array $options = array())
{
$this->parseContainer($container);
if (null === $container) {
$container = $this->getContainer();
}
$options = $this->normalizeOptions($options);
if ($options['onlyActiveBranch'] && !$options['renderParents']) {
$html = $this->renderDeepestMenu($container,
$options['ulClass'],
$options['indent'],
$options['minDepth'],
$options['maxDepth'],
$options['escapeLabels'],
$options['addClassToListItem']
);
} else {
$html = $this->renderNormalMenu($container,
$options['ulClass'],
$options['indent'],
$options['minDepth'],
$options['maxDepth'],
$options['onlyActiveBranch'],
$options['escapeLabels'],
$options['addClassToListItem']
);
}
return $html;
}
/**
* Renders a normal menu (called from {@link renderMenu()})
*
* @param AbstractContainer $container container to render
* @param string $ulClass CSS class for first UL
* @param string $indent initial indentation
* @param int|null $minDepth minimum depth
* @param int|null $maxDepth maximum depth
* @param bool $onlyActive render only active branch?
* @param bool $escapeLabels Whether or not to escape the labels
* @param bool $addClassToListItem Whether or not page class applied to <li> element
* @return string
*/
protected function renderNormalMenu(
AbstractContainer $container,
$ulClass,
$indent,
$minDepth,
$maxDepth,
$onlyActive,
$escapeLabels,
$addClassToListItem
) {
$html = '';
// find deepest active
$found = $this->findActive($container, $minDepth, $maxDepth);
if ($found) {
$foundPage = $found['page'];
$foundDepth = $found['depth'];
} else {
$foundPage = null;
}
// create iterator
$iterator = new RecursiveIteratorIterator($container,
RecursiveIteratorIterator::SELF_FIRST);
if (is_int($maxDepth)) {
$iterator->setMaxDepth($maxDepth);
}
// iterate container
$prevDepth = -1;
foreach ($iterator as $page) {
$depth = $iterator->getDepth();
$isActive = $page->isActive(true);
if ($depth < $minDepth || !$this->accept($page)) {
// page is below minDepth or not accepted by acl/visibility
continue;
} elseif ($onlyActive && !$isActive) {
// page is not active itself, but might be in the active branch
$accept = false;
if ($foundPage) {
if ($foundPage->hasPage($page)) {
// accept if page is a direct child of the active page
$accept = true;
} elseif ($foundPage->getParent()->hasPage($page)) {
// page is a sibling of the active page...
if (!$foundPage->hasPages() ||
is_int($maxDepth) && $foundDepth + 1 > $maxDepth) {
// accept if active page has no children, or the
// children are too deep to be rendered
$accept = true;
}
}
}
if (!$accept) {
continue;
}
}
// make sure indentation is correct
$depth -= $minDepth;
$myIndent = $indent . str_repeat(' ', $depth);
if ($depth > $prevDepth) {
// start new ul tag
if ($ulClass && $depth == 0) {
$ulClass = ' class="' . $ulClass . '"';
} else {
$ulClass = '';
}
$html .= $myIndent . '<ul' . $ulClass . '>' . self::EOL;
} elseif ($prevDepth > $depth) {
// close li/ul tags until we're at current depth
for ($i = $prevDepth; $i > $depth; $i--) {
$ind = $indent . str_repeat(' ', $i);
$html .= $ind . ' </li>' . self::EOL;
$html .= $ind . '</ul>' . self::EOL;
}
// close previous li tag
$html .= $myIndent . ' </li>' . self::EOL;
} else {
// close previous li tag
$html .= $myIndent . ' </li>' . self::EOL;
}
// render li tag and page
$liClasses = array();
// Is page active?
if ($isActive) {
$liClasses[] = 'active';
}
// Add CSS class from page to <li>
if ($addClassToListItem && $page->getClass()) {
$liClasses[] = $page->getClass();
}
$liClass = empty($liClasses) ? '' : ' class="' . implode(' ', $liClasses) . '"';
$html .= $myIndent . ' <li' . $liClass . '>' . self::EOL
. $myIndent . ' ' . $this->htmlify($page, $escapeLabels, $addClassToListItem) . self::EOL;
// store as previous depth for next iteration
$prevDepth = $depth;
}
if ($html) {
// done iterating container; close open ul/li tags
for ($i = $prevDepth+1; $i > 0; $i--) {
$myIndent = $indent . str_repeat(' ', $i-1);
$html .= $myIndent . ' </li>' . self::EOL
. $myIndent . '</ul>' . self::EOL;
}
$html = rtrim($html, self::EOL);
}
return $html;
}
/**
* Renders the given $container by invoking the partial view helper
*
* The container will simply be passed on as a model to the view script
* as-is, and will be available in the partial script as 'container', e.g.
* <code>echo 'Number of pages: ', count($this->container);</code>.
*
* @param AbstractContainer $container [optional] container to pass to view
* script. Default is to use the container
* registered in the helper.
* @param string|array $partial [optional] partial view script to use.
* Default is to use the partial
* registered in the helper. If an array
* is given, it is expected to contain two
* values; the partial view script to use,
* and the module where the script can be
* found.
* @return string
* @throws Exception\RuntimeException if no partial provided
* @throws Exception\InvalidArgumentException if partial is invalid array
*/
public function renderPartial($container = null, $partial = null)
{
$this->parseContainer($container);
if (null === $container) {
$container = $this->getContainer();
}
if (null === $partial) {
$partial = $this->getPartial();
}
if (empty($partial)) {
throw new Exception\RuntimeException(
'Unable to render menu: No partial view script provided'
);
}
$model = array(
'container' => $container
);
if (is_array($partial)) {
if (count($partial) != 2) {
throw new Exception\InvalidArgumentException(
'Unable to render menu: A view partial supplied as '
. 'an array must contain two values: partial view '
. 'script and module where script can be found'
);
}
$partialHelper = $this->view->plugin('partial');
return $partialHelper($partial[0], /*$partial[1], */$model);
}
$partialHelper = $this->view->plugin('partial');
return $partialHelper($partial, $model);
}
/**
* Renders the inner-most sub menu for the active page in the $container
*
* This is a convenience method which is equivalent to the following call:
* <code>
* renderMenu($container, array(
* 'indent' => $indent,
* 'ulClass' => $ulClass,
* 'minDepth' => null,
* 'maxDepth' => null,
* 'onlyActiveBranch' => true,
* 'renderParents' => false
* ));
* </code>
*
* @param AbstractContainer $container [optional] container to
* render. Default is to render
* the container registered in
* the helper.
* @param string $ulClass [optional] CSS class to
* use for UL element. Default
* is to use the value from
* {@link getUlClass()}.
* @param string|int $indent [optional] indentation as
* a string or number of
* spaces. Default is to use
* the value retrieved from
* {@link getIndent()}.
* @return string
*/
public function renderSubMenu(
AbstractContainer $container = null,
$ulClass = null,
$indent = null
) {
return $this->renderMenu($container, array(
'indent' => $indent,
'ulClass' => $ulClass,
'minDepth' => null,
'maxDepth' => null,
'onlyActiveBranch' => true,
'renderParents' => false,
'escapeLabels' => true,
'addClassToListItem' => false,
));
}
/**
* Returns an HTML string containing an 'a' element for the given page if
* the page's href is not empty, and a 'span' element if it is empty
*
* Overrides {@link AbstractHelper::htmlify()}.
*
* @param AbstractPage $page page to generate HTML for
* @param bool $escapeLabel Whether or not to escape the label
* @param bool $addClassToListItem Whether or not to add the page class to the list item
* @return string
*/
public function htmlify(AbstractPage $page, $escapeLabel = true, $addClassToListItem = false)
{
// get label and title for translating
$label = $page->getLabel();
$title = $page->getTitle();
// translate label and title?
if (null !== ($translator = $this->getTranslator())) {
$textDomain = $this->getTranslatorTextDomain();
if (is_string($label) && !empty($label)) {
$label = $translator->translate($label, $textDomain);
}
if (is_string($title) && !empty($title)) {
$title = $translator->translate($title, $textDomain);
}
}
// get attribs for element
$attribs = array(
'id' => $page->getId(),
'title' => $title,
);
if ($addClassToListItem === false) {
$attribs['class'] = $page->getClass();
}
// does page have a href?
$href = $page->getHref();
if ($href) {
$element = 'a';
$attribs['href'] = $href;
$attribs['target'] = $page->getTarget();
} else {
$element = 'span';
}
$html = '<' . $element . $this->htmlAttribs($attribs) . '>';
if ($escapeLabel === true) {
$escaper = $this->view->plugin('escapeHtml');
$html .= $escaper($label);
} else {
$html .= $label;
}
$html .= '</' . $element . '>';
return $html;
}
/**
* Normalizes given render options
*
* @param array $options [optional] options to normalize
* @return array
*/
protected function normalizeOptions(array $options = array())
{
if (isset($options['indent'])) {
$options['indent'] = $this->getWhitespace($options['indent']);
} else {
$options['indent'] = $this->getIndent();
}
if (isset($options['ulClass']) && $options['ulClass'] !== null) {
$options['ulClass'] = (string) $options['ulClass'];
} else {
$options['ulClass'] = $this->getUlClass();
}
if (array_key_exists('minDepth', $options)) {
if (null !== $options['minDepth']) {
$options['minDepth'] = (int) $options['minDepth'];
}
} else {
$options['minDepth'] = $this->getMinDepth();
}
if ($options['minDepth'] < 0 || $options['minDepth'] === null) {
$options['minDepth'] = 0;
}
if (array_key_exists('maxDepth', $options)) {
if (null !== $options['maxDepth']) {
$options['maxDepth'] = (int) $options['maxDepth'];
}
} else {
$options['maxDepth'] = $this->getMaxDepth();
}
if (!isset($options['onlyActiveBranch'])) {
$options['onlyActiveBranch'] = $this->getOnlyActiveBranch();
}
if (!isset($options['escapeLabels'])) {
$options['escapeLabels'] = $this->escapeLabels;
}
if (!isset($options['renderParents'])) {
$options['renderParents'] = $this->getRenderParents();
}
if (!isset($options['addClassToListItem'])) {
$options['addClassToListItem'] = $this->getAddClassToListItem();
}
return $options;
}
/**
* Sets a flag indicating whether labels should be escaped
*
* @param bool $flag [optional] escape labels
* @return Menu
*/
public function escapeLabels($flag = true)
{
$this->escapeLabels = (bool) $flag;
return $this;
}
/**
* Enables/disables page class applied to <li> element
*
* @param bool $flag [optional] page class applied to <li> element
* Default is true.
* @return Menu fluent interface, returns self
*/
public function setAddClassToListItem($flag = true)
{
$this->addClassToListItem = (bool) $flag;
return $this;
}
/**
* Returns flag indicating whether page class should be applied to <li> element
*
* By default, this value is false.
*
* @return bool whether parents should be rendered
*/
public function getAddClassToListItem()
{
return $this->addClassToListItem;
}
/**
* Sets a flag indicating whether only active branch should be rendered
*
* @param bool $flag [optional] render only active branch.
* @return Menu
*/
public function setOnlyActiveBranch($flag = true)
{
$this->onlyActiveBranch = (bool) $flag;
return $this;
}
/**
* Returns a flag indicating whether only active branch should be rendered
*
* By default, this value is false, meaning the entire menu will be
* be rendered.
*
* @return bool
*/
public function getOnlyActiveBranch()
{
return $this->onlyActiveBranch;
}
/**
* Sets which partial view script to use for rendering menu
*
* @param string|array $partial partial view script or null. If an array is
* given, it is expected to contain two
* values; the partial view script to use,
* and the module where the script can be
* found.
* @return Menu
*/
public function setPartial($partial)
{
if (null === $partial || is_string($partial) || is_array($partial)) {
$this->partial = $partial;
}
return $this;
}
/**
* Returns partial view script to use for rendering menu
*
* @return string|array|null
*/
public function getPartial()
{
return $this->partial;
}
/**
* Enables/disables rendering of parents when only rendering active branch
*
* See {@link setOnlyActiveBranch()} for more information.
*
* @param bool $flag [optional] render parents when rendering active branch.
* @return Menu
*/
public function setRenderParents($flag = true)
{
$this->renderParents = (bool) $flag;
return $this;
}
/**
* Returns flag indicating whether parents should be rendered when rendering
* only the active branch
*
* By default, this value is true.
*
* @return bool
*/
public function getRenderParents()
{
return $this->renderParents;
}
/**
* Sets CSS class to use for the first 'ul' element when rendering
*
* @param string $ulClass CSS class to set
* @return Menu
*/
public function setUlClass($ulClass)
{
if (is_string($ulClass)) {
$this->ulClass = $ulClass;
}
return $this;
}
/**
* Returns CSS class to use for the first 'ul' element when rendering
*
* @return string
*/
public function getUlClass()
{
return $this->ulClass;
}
}