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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: HelperAbstract.php 16971 2009-07-22 18:05:45Z mikaelkael $
*/
/**
* @see Zend_View_Helper_Navigation_Helper
*/
require_once 'Zend/View/Helper/Navigation/Helper.php';
/**
* @see Zend_View_Helper_HtmlElement
*/
require_once 'Zend/View/Helper/HtmlElement.php';
/**
* Base class for navigational helpers
*
* @category Zend
* @package Zend_View
* @subpackage Helper
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_View_Helper_Navigation_HelperAbstract
extends Zend_View_Helper_HtmlElement
implements Zend_View_Helper_Navigation_Helper
{
/**
* Container to operate on by default
*
* @var Zend_Navigation_Container
*/
protected $_container;
/**
* The minimum depth a page must have to be included when rendering
*
* @var int
*/
protected $_minDepth;
/**
* The maximum depth a page can have to be included when rendering
*
* @var int
*/
protected $_maxDepth;
/**
* Indentation string
*
* @var string
*/
protected $_indent = '';
/**
* Translator
*
* @var Zend_Translate_Adapter
*/
protected $_translator;
/**
* ACL to use when iterating pages
*
* @var Zend_Acl
*/
protected $_acl;
/**
* Wheter invisible items should be rendered by this helper
*
* @var bool
*/
protected $_renderInvisible = false;
/**
* ACL role to use when iterating pages
*
* @var string|Zend_Acl_Role_Interface
*/
protected $_role;
/**
* Whether translator should be used for page labels and titles
*
* @var bool
*/
protected $_useTranslator = true;
/**
* Whether ACL should be used for filtering out pages
*
* @var bool
*/
protected $_useAcl = true;
/**
* Default ACL to use when iterating pages if not explicitly set in the
* instance by calling {@link setAcl()}
*
* @var Zend_Acl
*/
protected static $_defaultAcl;
/**
* Default ACL role to use when iterating pages if not explicitly set in the
* instance by calling {@link setRole()}
*
* @var string|Zend_Acl_Role_Interface
*/
protected static $_defaultRole;
// Accessors:
/**
* Sets navigation container the helper operates on by default
*
* Implements {@link Zend_View_Helper_Navigation_Interface::setContainer()}.
*
* @param Zend_Navigation_Container $container [optional] container
* to operate on.
* Default is null,
* meaning container
* will be reset.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setContainer(Zend_Navigation_Container $container = null)
{
$this->_container = $container;
return $this;
}
/**
* Returns the navigation container helper operates on by default
*
* Implements {@link Zend_View_Helper_Navigation_Interface::getContainer()}.
*
* If a helper is not explicitly set in this helper instance by calling
* {@link setContainer()} or by passing it through the helper entry point,
* this method will look in {@link Zend_Registry} for a container by using
* the key 'Zend_Navigation'.
*
* If no container is set, and nothing is found in Zend_Registry, a new
* container will be instantiated and stored in the helper.
*
* @return Zend_Navigation_Container navigation container
*/
public function getContainer()
{
if (null === $this->_container) {
// try to fetch from registry first
require_once 'Zend/Registry.php';
if (Zend_Registry::isRegistered('Zend_Navigation')) {
$nav = Zend_Registry::get('Zend_Navigation');
if ($nav instanceof Zend_Navigation_Container) {
return $this->_container = $nav;
}
}
// nothing found in registry, create new container
require_once 'Zend/Navigation.php';
$this->_container = new Zend_Navigation();
}
return $this->_container;
}
/**
* Sets the minimum depth a page must have to be included when rendering
*
* @param int $minDepth [optional] minimum
* depth. Default is
* null, which sets
* no minimum depth.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setMinDepth($minDepth = null)
{
if (null === $minDepth || is_int($minDepth)) {
$this->_minDepth = $minDepth;
} else {
$this->_minDepth = (int) $minDepth;
}
return $this;
}
/**
* Returns minimum depth a page must have to be included when rendering
*
* @return int|null minimum depth or null
*/
public function getMinDepth()
{
if (!is_int($this->_minDepth) || $this->_minDepth < 0) {
return 0;
}
return $this->_minDepth;
}
/**
* Sets the maximum depth a page can have to be included when rendering
*
* @param int $maxDepth [optional] maximum
* depth. Default is
* null, which sets no
* maximum depth.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setMaxDepth($maxDepth = null)
{
if (null === $maxDepth || is_int($maxDepth)) {
$this->_maxDepth = $maxDepth;
} else {
$this->_maxDepth = (int) $maxDepth;
}
return $this;
}
/**
* Returns maximum depth a page can have to be included when rendering
*
* @return int|null maximum depth or null
*/
public function getMaxDepth()
{
return $this->_maxDepth;
}
/**
* Set the indentation string for using in {@link render()}, optionally a
* number of spaces to indent with
*
* @param string|int $indent indentation string or
* number of spaces
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setIndent($indent)
{
$this->_indent = $this->_getWhitespace($indent);
return $this;
}
/**
* Returns indentation
*
* @return string
*/
public function getIndent()
{
return $this->_indent;
}
/**
* Sets translator to use in helper
*
* Implements {@link Zend_View_Helper_Navigation_Helper::setTranslator()}.
*
* @param mixed $translator [optional] translator.
* Expects an object of
* type
* {@link Zend_Translate_Adapter}
* or {@link Zend_Translate},
* or null. Default is
* null, which sets no
* translator.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setTranslator($translator = null)
{
if (null == $translator ||
$translator instanceof Zend_Translate_Adapter) {
$this->_translator = $translator;
} elseif ($translator instanceof Zend_Translate) {
$this->_translator = $translator->getAdapter();
}
return $this;
}
/**
* Returns translator used in helper
*
* Implements {@link Zend_View_Helper_Navigation_Helper::getTranslator()}.
*
* @return Zend_Translate_Adapter|null translator or null
*/
public function getTranslator()
{
if (null === $this->_translator) {
require_once 'Zend/Registry.php';
if (Zend_Registry::isRegistered('Zend_Translate')) {
$this->setTranslator(Zend_Registry::get('Zend_Translate'));
}
}
return $this->_translator;
}
/**
* Sets ACL to use when iterating pages
*
* Implements {@link Zend_View_Helper_Navigation_Helper::setAcl()}.
*
* @param Zend_Acl $acl [optional] ACL object.
* Default is null.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setAcl(Zend_Acl $acl = null)
{
$this->_acl = $acl;
return $this;
}
/**
* Returns ACL or null if it isn't set using {@link setAcl()} or
* {@link setDefaultAcl()}
*
* Implements {@link Zend_View_Helper_Navigation_Helper::getAcl()}.
*
* @return Zend_Acl|null ACL object or null
*/
public function getAcl()
{
if ($this->_acl === null && self::$_defaultAcl !== null) {
return self::$_defaultAcl;
}
return $this->_acl;
}
/**
* Sets ACL role(s) to use when iterating pages
*
* Implements {@link Zend_View_Helper_Navigation_Helper::setRole()}.
*
* @param mixed $role [optional] role to
* set. Expects a string,
* an instance of type
* {@link Zend_Acl_Role_Interface},
* or null. Default is
* null, which will set
* no role.
* @throws Zend_View_Exception if $role is invalid
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setRole($role = null)
{
if (null === $role || is_string($role) ||
$role instanceof Zend_Acl_Role_Interface) {
$this->_role = $role;
} else {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(sprintf(
'$role must be a string, null, or an instance of ' .
'Zend_Acl_Role_Interface; %s given',
gettype($role)));
}
return $this;
}
/**
* Returns ACL role to use when iterating pages, or null if it isn't set
* using {@link setRole()} or {@link setDefaultRole()}
*
* Implements {@link Zend_View_Helper_Navigation_Helper::getRole()}.
*
* @return string|Zend_Acl_Role_Interface|null role or null
*/
public function getRole()
{
if ($this->_role === null && self::$_defaultRole !== null) {
return self::$_defaultRole;
}
return $this->_role;
}
/**
* Sets whether ACL should be used
*
* Implements {@link Zend_View_Helper_Navigation_Helper::setUseAcl()}.
*
* @param bool $useAcl [optional] whether ACL
* should be used.
* Default is true.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setUseAcl($useAcl = true)
{
$this->_useAcl = (bool) $useAcl;
return $this;
}
/**
* Returns whether ACL should be used
*
* Implements {@link Zend_View_Helper_Navigation_Helper::getUseAcl()}.
*
* @return bool whether ACL should be used
*/
public function getUseAcl()
{
return $this->_useAcl;
}
/**
* Return renderInvisible flag
*
* @return bool
*/
public function getRenderInvisible()
{
return $this->_renderInvisible;
}
/**
* Render invisible items?
*
* @param bool $renderInvisible [optional] boolean flag
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface
* returns self
*/
public function setRenderInvisible($renderInvisible = true)
{
$this->_renderInvisible = (bool) $renderInvisible;
return $this;
}
/**
* Sets whether translator should be used
*
* Implements {@link Zend_View_Helper_Navigation_Helper::setUseTranslator()}.
*
* @param bool $useTranslator [optional] whether
* translator should be
* used. Default is true.
* @return Zend_View_Helper_Navigation_HelperAbstract fluent interface,
* returns self
*/
public function setUseTranslator($useTranslator = true)
{
$this->_useTranslator = (bool) $useTranslator;
return $this;
}
/**
* Returns whether translator should be used
*
* Implements {@link Zend_View_Helper_Navigation_Helper::getUseTranslator()}.
*
* @return bool whether translator should be used
*/
public function getUseTranslator()
{
return $this->_useTranslator;
}
// Magic overloads:
/**
* Magic overload: Proxy calls to the navigation container
*
* @param string $method method name in container
* @param array $arguments [optional] arguments to pass
* @return mixed returns what the container returns
* @throws Zend_Navigation_Exception if method does not exist in container
*/
public function __call($method, array $arguments = array())
{
return call_user_func_array(
array($this->getContainer(), $method),
$arguments);
}
/**
* Magic overload: Proxy to {@link render()}.
*
* This method will trigger an E_USER_ERROR if rendering the helper causes
* an exception to be thrown.
*
* Implements {@link Zend_View_Helper_Navigation_Helper::__toString()}.
*
* @return string
*/
public function __toString()
{
try {
return $this->render();
} catch (Exception $e) {
$msg = get_class($e) . ': ' . $e->getMessage();
trigger_error($msg, E_USER_ERROR);
return '';
}
}
// Public methods:
/**
* Finds the deepest active page in the given container
*
* @param Zend_Navigation_Container $container container to search
* @param int|null $minDepth [optional] minimum depth
* required for page to be
* valid. Default is to use
* {@link getMinDepth()}. A
* null value means no minimum
* depth required.
* @param int|null $minDepth [optional] maximum depth
* a page can have to be
* valid. Default is to use
* {@link getMaxDepth()}. A
* null value means no maximum
* depth required.
* @return array an associative array with
* the values 'depth' and
* 'page', or an empty array
* if not found
*/
public function findActive(Zend_Navigation_Container $container,
$minDepth = null,
$maxDepth = -1)
{
if (!is_int($minDepth)) {
$minDepth = $this->getMinDepth();
}
if ((!is_int($maxDepth) || $maxDepth < 0) && null !== $maxDepth) {
$maxDepth = $this->getMaxDepth();
}
$found = null;
$foundDepth = -1;
$iterator = new RecursiveIteratorIterator($container,
RecursiveIteratorIterator::CHILD_FIRST);
foreach ($iterator as $page) {
$currDepth = $iterator->getDepth();
if ($currDepth < $minDepth || !$this->accept($page)) {
// page is not accepted
continue;
}
if ($page->isActive(false) && $currDepth > $foundDepth) {
// found an active page at a deeper level than before
$found = $page;
$foundDepth = $currDepth;
}
}
if (is_int($maxDepth) && $foundDepth > $maxDepth) {
while ($foundDepth > $maxDepth) {
if (--$foundDepth < $minDepth) {
$found = null;
break;
}
$found = $found->getParent();
if (!$found instanceof Zend_Navigation_Page) {
$found = null;
break;
}
}
}
if ($found) {
return array('page' => $found, 'depth' => $foundDepth);
} else {
return array();
}
}
/**
* Checks if the helper has a container
*
* Implements {@link Zend_View_Helper_Navigation_Helper::hasContainer()}.
*
* @return bool whether the helper has a container or not
*/
public function hasContainer()
{
return null !== $this->_container;
}
/**
* Checks if the helper has an ACL instance
*
* Implements {@link Zend_View_Helper_Navigation_Helper::hasAcl()}.
*
* @return bool whether the helper has a an ACL instance or not
*/
public function hasAcl()
{
return null !== $this->_acl;
}
/**
* Checks if the helper has an ACL role
*
* Implements {@link Zend_View_Helper_Navigation_Helper::hasRole()}.
*
* @return bool whether the helper has a an ACL role or not
*/
public function hasRole()
{
return null !== $this->_role;
}
/**
* Checks if the helper has a translator
*
* Implements {@link Zend_View_Helper_Navigation_Helper::hasTranslator()}.
*
* @return bool whether the helper has a translator or not
*/
public function hasTranslator()
{
return null !== $this->_translator;
}
/**
* Returns an HTML string containing an 'a' element for the given page
*
* @param Zend_Navigation_Page $page page to generate HTML for
* @return string HTML string for the given page
*/
public function htmlify(Zend_Navigation_Page $page)
{
// get label and title for translating
$label = $page->getLabel();
$title = $page->getTitle();
if ($this->getUseTranslator() && $t = $this->getTranslator()) {
if (is_string($label) && !empty($label)) {
$label = $t->translate($label);
}
if (is_string($title) && !empty($title)) {
$title = $t->translate($title);
}
}
// get attribs for anchor element
$attribs = array(
'id' => $page->getId(),
'title' => $title,
'class' => $page->getClass(),
'href' => $page->getHref(),
'target' => $page->getTarget()
);
return '<a' . $this->_htmlAttribs($attribs) . '>'
. $this->view->escape($label)
. '</a>';
}
// Iterator filter methods:
/**
* Determines whether a page should be accepted when iterating
*
* Rules:
* - If a page is not visible it is not accepted, unless RenderInvisible has
* been set to true.
* - If helper has no ACL, page is accepted
* - If helper has ACL, but no role, page is not accepted
* - If helper has ACL and role:
* - Page is accepted if it has no resource or privilege
* - Page is accepted if ACL allows page's resource or privilege
* - If page is accepted by the rules above and $recursive is true, the page
* will not be accepted if it is the descendant of a non-accepted page.
*
* @param Zend_Navigation_Page $page page to check
* @param bool $recursive [optional] if true, page will not
* be accepted if it is the
* descendant of a page that is not
* accepted. Default is true.
* @return bool whether page should be accepted
*/
public function accept(Zend_Navigation_Page $page, $recursive = true)
{
// accept by default
$accept = true;
if (!$page->isVisible(false) && !$this->getRenderInvisible()) {
// don't accept invisible pages
$accept = false;
} elseif ($this->getUseAcl() && !$this->_acceptAcl($page)) {
// acl is not amused
$accept = false;
}
if ($accept && $recursive) {
$parent = $page->getParent();
if ($parent instanceof Zend_Navigation_Page) {
$accept = $this->accept($parent, true);
}
}
return $accept;
}
/**
* Determines whether a page should be accepted by ACL when iterating
*
* Rules:
* - If helper has no ACL, page is accepted
* - If page has a resource or privilege defined, page is accepted
* if the ACL allows access to it using the helper's role
* - If page has no resource or privilege, page is accepted
*
* @param Zend_Navigation_Page $page page to check
* @return bool whether page is accepted by ACL
*/
protected function _acceptAcl(Zend_Navigation_Page $page)
{
if (!$acl = $this->getAcl()) {
// no acl registered means don't use acl
return true;
}
$role = $this->getRole();
$resource = $page->getResource();
$privilege = $page->getPrivilege();
if ($resource || $privilege) {
// determine using helper role and page resource/privilege
return $acl->isAllowed($role, $resource, $privilege);
}
return true;
}
// Util methods:
/**
* Retrieve whitespace representation of $indent
*
* @param int|string $indent
* @return string
*/
protected function _getWhitespace($indent)
{
if (is_int($indent)) {
$indent = str_repeat(' ', $indent);
}
return (string) $indent;
}
/**
* Converts an associative array to a string of tag attributes.
*
* Overloads {@link Zend_View_Helper_HtmlElement::_htmlAttribs()}.
*
* @param array $attribs an array where each key-value pair is converted
* to an attribute name and value
* @return string an attribute string
*/
protected function _htmlAttribs($attribs)
{
// filter out null values and empty string values
foreach ($attribs as $key => $value) {
if ($value === null || (is_string($value) && !strlen($value))) {
unset($attribs[$key]);
}
}
return parent::_htmlAttribs($attribs);
}
/**
* Normalize an ID
*
* Overrides {@link Zend_View_Helper_HtmlElement::_normalizeId()}.
*
* @param string $value
* @return string
*/
protected function _normalizeId($value)
{
$prefix = get_class($this);
$prefix = strtolower(trim(substr($prefix, strrpos($prefix, '_')), '_'));
return $prefix . '-' . $value;
}
// Static methods:
/**
* Sets default ACL to use if another ACL is not explicitly set
*
* @param Zend_Acl $acl [optional] ACL object. Default is null, which
* sets no ACL object.
* @return void
*/
public static function setDefaultAcl(Zend_Acl $acl = null)
{
self::$_defaultAcl = $acl;
}
/**
* Sets default ACL role(s) to use when iterating pages if not explicitly
* set later with {@link setRole()}
*
* @param midex $role [optional] role to set. Expects null,
* string, or an instance of
* {@link Zend_Acl_Role_Interface}.
* Default is null, which sets no default
* role.
* @throws Zend_View_Exception if role is invalid
* @return void
*/
public static function setDefaultRole($role = null)
{
if (null === $role ||
is_string($role) ||
$role instanceof Zend_Acl_Role_Interface) {
self::$_defaultRole = $role;
} else {
require_once 'Zend/View/Exception.php';
throw new Zend_View_Exception(
'$role must be null|string|Zend_Acl_Role_Interface');
}
}
}
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