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<?php
/**
* Base class for all HTML_QuickForm2 elements
*
* PHP version 5
*
* LICENSE
*
* This source file is subject to BSD 3-Clause License that is bundled
* with this package in the file LICENSE and available at the URL
* https://raw.githubusercontent.com/pear/HTML_QuickForm2/trunk/docs/LICENSE
*
* @category HTML
* @package HTML_QuickForm2
* @author Alexey Borzov <avb@php.net>
* @author Bertrand Mansion <golgote@mamasam.com>
* @copyright 2006-2019 Alexey Borzov <avb@php.net>, Bertrand Mansion <golgote@mamasam.com>
* @license https://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
* @link https://pear.php.net/package/HTML_QuickForm2
*/
/**
* HTML_Common2 - base class for HTML elements
*/
require_once 'HTML/Common2.php';
// By default, we generate element IDs with numeric indexes appended even for
// elements with unique names. If you want IDs to be equal to the element
// names by default, set this configuration option to false.
if (null === HTML_Common2::getOption('id_force_append_index')) {
HTML_Common2::setOption('id_force_append_index', true);
}
// set the default language for various elements' messages
if (null === HTML_Common2::getOption('language')) {
HTML_Common2::setOption('language', 'en');
}
/**
* Exception classes for HTML_QuickForm2
*/
require_once 'HTML/QuickForm2/Exception.php';
/**
* Static factory class for QuickForm2 elements
*/
require_once 'HTML/QuickForm2/Factory.php';
/**
* Base class for HTML_QuickForm2 rules
*/
require_once 'HTML/QuickForm2/Rule.php';
/**
* Abstract base class for all QuickForm2 Elements and Containers
*
* This class is mostly here to define the interface that should be implemented
* by the subclasses. It also contains static methods handling generation
* of unique ids for elements which do not have ids explicitly set.
*
* @category HTML
* @package HTML_QuickForm2
* @author Alexey Borzov <avb@php.net>
* @author Bertrand Mansion <golgote@mamasam.com>
* @license https://opensource.org/licenses/BSD-3-Clause BSD 3-Clause License
* @version Release: 2.1.0
* @link https://pear.php.net/package/HTML_QuickForm2
*/
abstract class HTML_QuickForm2_Node extends HTML_Common2
{
/**
* Array containing the parts of element ids
* @var array
*/
protected static $ids = array();
/**
* Element's "frozen" status
* @var boolean
*/
protected $frozen = false;
/**
* Whether element's value should persist when element is frozen
* @var boolean
*/
protected $persistent = false;
/**
* Element containing current
* @var HTML_QuickForm2_Container
*/
protected $container = null;
/**
* Contains options and data used for the element creation
* @var array
*/
protected $data = array();
/**
* Validation rules for element
* @var array
*/
protected $rules = array();
/**
* An array of callback filters for element
* @var array
*/
protected $filters = array();
/**
* Recursive filter callbacks for element
*
* These are recursively applied for array values of element or propagated
* to contained elements if the element is a Container
*
* @var array
*/
protected $recursiveFilters = array();
/**
* Error message (usually set via Rule if validation fails)
* @var string
*/
protected $error = null;
/**
* Changing 'name' and 'id' attributes requires some special handling
* @var array
*/
protected $watchedAttributes = array('id', 'name');
/**
* Intercepts setting 'name' and 'id' attributes
*
* These attributes should always be present and thus trying to remove them
* will result in an exception. Changing their values is delegated to
* setName() and setId() methods, respectively
*
* @param string $name Attribute name
* @param string $value Attribute value, null if attribute is being removed
*
* @throws HTML_QuickForm2_InvalidArgumentException if trying to
* remove a required attribute
*/
protected function onAttributeChange($name, $value = null)
{
if ('name' == $name) {
if (null === $value) {
throw new HTML_QuickForm2_InvalidArgumentException(
"Required attribute 'name' can not be removed"
);
} else {
$this->setName($value);
}
} elseif ('id' == $name) {
if (null === $value) {
throw new HTML_QuickForm2_InvalidArgumentException(
"Required attribute 'id' can not be removed"
);
} else {
$this->setId($value);
}
}
}
/**
* Class constructor
*
* @param string $name Element name
* @param string|array $attributes HTML attributes (either a string or an array)
* @param array $data Element data (label, options used for element setup)
*/
public function __construct($name = null, $attributes = null, array $data = array())
{
parent::__construct($attributes);
$this->setName($name);
// Autogenerating the id if not set on previous steps
if ('' == $this->getId()) {
$this->setId();
}
if (!empty($data)) {
$this->data = array_merge($this->data, $data);
}
}
/**
* Generates an id for the element
*
* Called when an element is created without explicitly given id
*
* @param string $elementName Element name
*
* @return string The generated element id
*/
protected static function generateId($elementName)
{
$stop = !self::getOption('id_force_append_index');
$tokens = strlen($elementName)
? explode('[', str_replace(']', '', $elementName))
: ($stop? array('qfauto', ''): array('qfauto'));
$container =& self::$ids;
$id = '';
do {
$token = array_shift($tokens);
// prevent generated ids starting with numbers
if ('' == $id && is_numeric($token)) {
$token = 'qf' . $token;
}
// Handle the 'array[]' names
if ('' === $token) {
if (empty($container)) {
$token = 0;
} else {
$keys = array_filter(array_keys($container), 'is_numeric');
$token = empty($keys) ? 0 : end($keys);
while (isset($container[$token])) {
$token++;
}
}
}
$id .= '-' . $token;
if (!isset($container[$token])) {
$container[$token] = array();
// Handle duplicate names when not having mandatory indexes
} elseif (empty($tokens) && $stop) {
$tokens[] = '';
}
// Handle mandatory indexes
if (empty($tokens) && !$stop) {
$tokens[] = '';
$stop = true;
}
$container =& $container[$token];
} while (!empty($tokens));
return substr($id, 1);
}
/**
* Stores the explicitly given id to prevent duplicate id generation
*
* @param string $id Element id
*/
protected static function storeId($id)
{
$tokens = explode('-', $id);
$container =& self::$ids;
do {
$token = array_shift($tokens);
if (!isset($container[$token])) {
$container[$token] = array();
}
$container =& $container[$token];
} while (!empty($tokens));
}
/**
* Returns the element options
*
* @return array
*/
public function getData()
{
return $this->data;
}
/**
* Returns the element's type
*
* @return string
*/
abstract public function getType();
/**
* Returns the element's name
*
* @return string
*/
public function getName()
{
return isset($this->attributes['name'])? $this->attributes['name']: null;
}
/**
* Sets the element's name
*
* @param string $name
*
* @return $this
*/
abstract public function setName($name);
/**
* Returns the element's id
*
* @return string
*/
public function getId()
{
return isset($this->attributes['id'])? $this->attributes['id']: null;
}
/**
* Sets the element's id
*
* Please note that elements should always have an id in QuickForm2 and
* therefore it will not be possible to remove the element's id or set it to
* an empty value. If id is not explicitly given, it will be autogenerated.
*
* @param string $id Element's id, will be autogenerated if not given
*
* @return $this
* @throws HTML_QuickForm2_InvalidArgumentException if id contains invalid
* characters (i.e. spaces)
*/
public function setId($id = null)
{
if (is_null($id)) {
$id = self::generateId($this->getName());
// HTML5 specification only disallows having space characters in id,
// so we don't do stricter checks here
} elseif (strpbrk($id, " \r\n\t\x0C")) {
throw new HTML_QuickForm2_InvalidArgumentException(
"The value of 'id' attribute should not contain space characters"
);
} else {
self::storeId($id);
}
$this->attributes['id'] = (string)$id;
return $this;
}
/**
* Returns the element's value without filters applied
*
* @return mixed
*/
abstract public function getRawValue();
/**
* Returns the element's value, possibly with filters applied
*
* @return mixed
*/
public function getValue()
{
$value = $this->getRawValue();
return is_null($value)? null: $this->applyFilters($value);
}
/**
* Sets the element's value
*
* @param mixed $value
*
* @return $this
*/
abstract public function setValue($value);
/**
* Returns the element's label(s)
*
* @return string|array
*/
public function getLabel()
{
if (isset($this->data['label'])) {
return $this->data['label'];
}
return null;
}
/**
* Sets the element's label(s)
*
* @param string|array $label Label for the element (may be an array of labels)
*
* @return $this
*/
public function setLabel($label)
{
$this->data['label'] = $label;
return $this;
}
/**
* Changes the element's frozen status
*
* @param bool $freeze Whether the element should be frozen or editable. If
* omitted, the method will not change the frozen status,
* just return its current value
*
* @return bool Old value of element's frozen status
*/
public function toggleFrozen($freeze = null)
{
$old = $this->frozen;
if (null !== $freeze) {
$this->frozen = (bool)$freeze;
}
return $old;
}
/**
* Changes the element's persistent freeze behaviour
*
* If persistent freeze is on, the element's value will be kept (and
* submitted) in a hidden field when the element is frozen.
*
* @param bool $persistent New value for "persistent freeze". If omitted, the
* method will not set anything, just return the current
* value of the flag.
*
* @return bool Old value of "persistent freeze" flag
*/
public function persistentFreeze($persistent = null)
{
$old = $this->persistent;
if (null !== $persistent) {
$this->persistent = (bool)$persistent;
}
return $old;
}
/**
* Adds the link to the element containing current
*
* @param HTML_QuickForm2_Container $container Element containing
* the current one, null if the link should
* really be removed (if removing from container)
*
* @throws HTML_QuickForm2_InvalidArgumentException If trying to set a
* child of an element as its container
*/
protected function setContainer(HTML_QuickForm2_Container $container = null)
{
if (null !== $container) {
$check = $container;
do {
if ($this === $check) {
throw new HTML_QuickForm2_InvalidArgumentException(
'Cannot set an element or its child as its own container'
);
}
} while ($check = $check->getContainer());
if (null !== $this->container && $container !== $this->container) {
$this->container->removeChild($this);
}
}
$this->container = $container;
if (null !== $container) {
$this->updateValue();
}
}
/**
* Returns the element containing current
*
* @return HTML_QuickForm2_Container|null
*/
public function getContainer()
{
return $this->container;
}
/**
* Returns the data sources for this element
*
* @return array
*/
protected function getDataSources()
{
if (empty($this->container)) {
return array();
} else {
return $this->container->getDataSources();
}
}
/**
* Called when the element needs to update its value from form's data sources
*/
abstract protected function updateValue();
/**
* Adds a validation rule
*
* @param HTML_QuickForm2_Rule|string $rule Validation rule or rule type
* @param string|int $messageOrRunAt If first parameter is rule type,
* then message to display if validation fails, otherwise constant showing
* whether to perfom validation client-side and/or server-side
* @param mixed $options Configuration data for the rule
* @param int $runAt Whether to perfom validation
* server-side and/or client side. Combination of
* HTML_QuickForm2_Rule::SERVER and HTML_QuickForm2_Rule::CLIENT constants
*
* @return HTML_QuickForm2_Rule The added rule
* @throws HTML_QuickForm2_InvalidArgumentException if $rule is of a
* wrong type or rule name isn't registered with Factory
* @throws HTML_QuickForm2_NotFoundException if class for a given rule
* name cannot be found
*/
public function addRule(
$rule, $messageOrRunAt = '', $options = null,
$runAt = HTML_QuickForm2_Rule::SERVER
) {
if ($rule instanceof HTML_QuickForm2_Rule) {
$rule->setOwner($this);
$runAt = '' == $messageOrRunAt? HTML_QuickForm2_Rule::SERVER: $messageOrRunAt;
} elseif (is_string($rule)) {
$rule = HTML_QuickForm2_Factory::createRule($rule, $this, $messageOrRunAt, $options);
} else {
throw new HTML_QuickForm2_InvalidArgumentException(
'addRule() expects either a rule type or ' .
'a HTML_QuickForm2_Rule instance'
);
}
$this->rules[] = array($rule, $runAt);
return $rule;
}
/**
* Removes a validation rule
*
* The method will *not* throw an Exception if the rule wasn't added to the
* element.
*
* @param HTML_QuickForm2_Rule $rule Validation rule to remove
*
* @return HTML_QuickForm2_Rule Removed rule
*/
public function removeRule(HTML_QuickForm2_Rule $rule)
{
foreach ($this->rules as $i => $r) {
if ($r[0] === $rule) {
unset($this->rules[$i]);
break;
}
}
return $rule;
}
/**
* Creates a validation rule
*
* This method is mostly useful when when chaining several rules together
* via {@link HTML_QuickForm2_Rule::and_()} and {@link HTML_QuickForm2_Rule::or_()}
* methods:
* <code>
* $first->addRule('nonempty', 'Fill in either first or second field')
* ->or_($second->createRule('nonempty'));
* </code>
*
* @param string $type Rule type
* @param string $message Message to display if validation fails
* @param mixed $options Configuration data for the rule
*
* @return HTML_QuickForm2_Rule The created rule
* @throws HTML_QuickForm2_InvalidArgumentException If rule type is unknown
* @throws HTML_QuickForm2_NotFoundException If class for the rule
* can't be found and/or loaded from file
*/
public function createRule($type, $message = '', $options = null)
{
return HTML_QuickForm2_Factory::createRule($type, $this, $message, $options);
}
/**
* Checks whether an element is required
*
* @return boolean
*/
public function isRequired()
{
foreach ($this->rules as $rule) {
if ($rule[0] instanceof HTML_QuickForm2_Rule_Required) {
return true;
}
}
return false;
}
/**
* Adds element's client-side validation rules to a builder object
*
* @param HTML_QuickForm2_JavascriptBuilder $builder
*/
protected function renderClientRules(HTML_QuickForm2_JavascriptBuilder $builder)
{
if ($this->toggleFrozen()) {
return;
}
$onblur = HTML_QuickForm2_Rule::ONBLUR_CLIENT ^ HTML_QuickForm2_Rule::CLIENT;
foreach ($this->rules as $rule) {
if ($rule[1] & HTML_QuickForm2_Rule::CLIENT) {
$builder->addRule($rule[0], $rule[1] & $onblur);
}
}
}
/**
* Performs the server-side validation
*
* @return boolean Whether the element is valid
*/
protected function validate()
{
foreach ($this->rules as $rule) {
if (strlen($this->error)) {
break;
}
if ($rule[1] & HTML_QuickForm2_Rule::SERVER) {
$rule[0]->validate();
}
}
return !strlen($this->error);
}
/**
* Sets the error message to the element
*
* @param string $error
*
* @return $this
*/
public function setError($error = null)
{
$this->error = (string)$error;
return $this;
}
/**
* Returns the error message for the element
*
* @return string
*/
public function getError()
{
return $this->error;
}
/**
* Returns Javascript code for getting the element's value
*
* @param bool $inContainer Whether it should return a parameter for
* qf.form.getContainerValue()
*
* @return string
*/
abstract public function getJavascriptValue($inContainer = false);
/**
* Returns IDs of form fields that should trigger "live" Javascript validation
*
* Rules added to this element with parameter HTML_QuickForm2_Rule::ONBLUR_CLIENT
* will be run by after these form elements change or lose focus
*
* @return array
*/
abstract public function getJavascriptTriggers();
/**
* Adds a filter
*
* A filter is simply a PHP callback which will be applied to the element value
* when getValue() is called.
*
* @param callback $callback The PHP callback used for filter
* @param array $options Optional arguments for the callback. The first parameter
* will always be the element value, then these options will
* be used as parameters for the callback.
*
* @return $this The element
* @throws HTML_QuickForm2_InvalidArgumentException If callback is incorrect
*/
public function addFilter($callback, array $options = array())
{
if (!is_callable($callback, false, $callbackName)) {
throw new HTML_QuickForm2_InvalidArgumentException(
"Filter should be a valid callback, '{$callbackName}' was given"
);
}
$this->filters[] = array($callback, $options);
return $this;
}
/**
* Adds a recursive filter
*
* A filter is simply a PHP callback which will be applied to the element value
* when getValue() is called. If the element value is an array, for example with
* selects of type 'multiple', the filter is applied to all values recursively.
* A filter on a container will not be applied on a container value but
* propagated to all contained elements instead.
*
* If the element is not a container and its value is not an array the behaviour
* will be identical to filters added via addFilter().
*
* @param callback $callback The PHP callback used for filter
* @param array $options Optional arguments for the callback. The first parameter
* will always be the element value, then these options will
* be used as parameters for the callback.
*
* @return $this The element
* @throws HTML_QuickForm2_InvalidArgumentException If callback is incorrect
*/
public function addRecursiveFilter($callback, array $options = array())
{
if (!is_callable($callback, false, $callbackName)) {
throw new HTML_QuickForm2_InvalidArgumentException(
"Filter should be a valid callback, '{$callbackName}' was given"
);
}
$this->recursiveFilters[] = array($callback, $options);
return $this;
}
/**
* Helper function for applying filter callback to a value
*
* @param mixed &$value Value being filtered
* @param mixed $key Array key (not used, present to be able to use this
* method as a callback to array_walk_recursive())
* @param array $filter Array containing callback and additional callback
* parameters
*/
protected static function applyFilter(&$value, $key, $filter)
{
list($callback, $options) = $filter;
array_unshift($options, $value);
$value = call_user_func_array($callback, $options);
}
/**
* Applies non-recursive filters on element value
*
* @param mixed $value Element value
*
* @return mixed Filtered value
*/
protected function applyFilters($value)
{
foreach ($this->filters as $filter) {
self::applyFilter($value, null, $filter);
}
return $value;
}
/**
* Renders the element using the given renderer
*
* @param HTML_QuickForm2_Renderer $renderer
* @return HTML_QuickForm2_Renderer
*/
abstract public function render(HTML_QuickForm2_Renderer $renderer);
}
?>
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