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<?php
/*
* Textpattern Content Management System
* https://textpattern.com/
*
* Copyright (C) 2026 The Textpattern Development Team
*
* This file is part of Textpattern.
*
* Textpattern is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, version 2.
*
* Textpattern is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Textpattern. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* A <form /> tag.
*
* @since 4.9.0
* @package UI
*/
namespace Textpattern\UI;
class Form extends Tag implements UICollectionInterface
{
/**
* Collection of tags to be used as content.
*
* @var array
*/
protected $tags = null;
/**
* Construct a single form container tag.
*
* @param string $method Which mechanism to submit the data - post or get
* @param mixed $item The UI element or collection to add as content
*/
public function __construct($method = 'post', $item = null)
{
parent::__construct('form');
$this->setAtts(array(
'class' => 'txp-form',
'method' => $method,
))
->setAction('index.php');
$this->tags = new \Textpattern\UI\TagCollection();
if ($item !== null) {
$this->add($item);
}
}
/**
* Add one or more elements to the form. Chainable.
*
* @param mixed $item The pre-built UI element or collection
* @param boolean $key The optional unique key to associate with the tag
*/
public function add($item, $key = null)
{
if ($item instanceof \Textpattern\UI\TagCollection) {
foreach ($item as $key => $element) {
$this->tags->add($element, $key);
}
// Original object is not needed any more as it's been merged in this object.
$item = null;
} else {
$this->tags->add($item, $key);
}
return $this;
}
/**
* Remove an element from the form. Chainable.
*
* @param string $key The reference to the object in the collection
* @return this
*/
public function remove($key)
{
$this->tags->remove($key);
return $this;
}
/**
* Fetch an element from the form.
*
* @param string $key The reference to the object in the collection
* @return object
*/
public function get($key)
{
$this->tags->get($key);
}
/**
* Fetch the list of keys in use in the form's tags.
*/
public function keys()
{
return $this->tags->keys();
}
/**
* Fetch the number of items in the form.
*/
public function length()
{
return $this->tags->length();
}
/**
* Check if the given key exists in the form.
*
* @param string $key The reference to the object in the collection
*/
public function keyExists($key)
{
return $this->tags->keyExists($key);
}
/**
* Define the form's destination URL. Chainable.
*
* @param string $action The main part of the endpoint URL
* @param string $fragment The part after the hash of the URL
*/
public function setAction($action, $fragment = null)
{
if ($fragment) {
$action .= '#'.$fragment;
}
$this->setAtt('action', $action);
return $this;
}
/**
* Add the elements as content and draw them.
*
* @param string $flavour To affect the flavour of tag returned - complete, self-closing, open, close, content
* @return string HTML
*/
public function render($flavour = 'complete')
{
$break = $this->getBreak();
$out = $this->tags->render($break);
$this->setContent(n.$out.n);
return parent::render($flavour);
}
}