website_jukni/dokuwiki/inc/Form/Form.php

440 lines
12 KiB
PHP
Raw Permalink Normal View History

<?php
namespace dokuwiki\Form;
/**
* Class Form
*
* Represents the whole Form. This is what you work on, and add Elements to
*
* @package dokuwiki\Form
*/
class Form extends Element {
/**
* @var array name value pairs for hidden values
*/
protected $hidden = array();
/**
* @var Element[] the elements of the form
*/
protected $elements = array();
/**
* Creates a new, empty form with some default attributes
*
* @param array $attributes
*/
public function __construct($attributes = array()) {
global $ID;
parent::__construct('form', $attributes);
// use the current URL as default action
if(!$this->attr('action')) {
$get = $_GET;
if(isset($get['id'])) unset($get['id']);
$self = wl($ID, $get, false, '&'); //attributes are escaped later
$this->attr('action', $self);
}
// post is default
if(!$this->attr('method')) {
$this->attr('method', 'post');
}
// we like UTF-8
if(!$this->attr('accept-charset')) {
$this->attr('accept-charset', 'utf-8');
}
// add the security token by default
$this->setHiddenField('sectok', getSecurityToken());
// identify this as a new form based form in HTML
$this->addClass('doku_form');
}
/**
* Sets a hidden field
*
* @param string $name
* @param string $value
* @return $this
*/
public function setHiddenField($name, $value) {
$this->hidden[$name] = $value;
return $this;
}
#region element query function
/**
* Returns the numbers of elements in the form
*
* @return int
*/
public function elementCount() {
return count($this->elements);
}
/**
* Returns a reference to the element at a position.
* A position out-of-bounds will return either the
* first (underflow) or last (overflow) element.
*
* @param int $pos
* @return Element
*/
public function getElementAt($pos) {
if($pos < 0) $pos = count($this->elements) + $pos;
if($pos < 0) $pos = 0;
if($pos >= count($this->elements)) $pos = count($this->elements) - 1;
return $this->elements[$pos];
}
/**
* Gets the position of the first of a type of element
*
* @param string $type Element type to look for.
* @param int $offset search from this position onward
* @return false|int position of element if found, otherwise false
*/
public function findPositionByType($type, $offset = 0) {
$len = $this->elementCount();
for($pos = $offset; $pos < $len; $pos++) {
if($this->elements[$pos]->getType() == $type) {
return $pos;
}
}
return false;
}
/**
* Gets the position of the first element matching the attribute
*
* @param string $name Name of the attribute
* @param string $value Value the attribute should have
* @param int $offset search from this position onward
* @return false|int position of element if found, otherwise false
*/
public function findPositionByAttribute($name, $value, $offset = 0) {
$len = $this->elementCount();
for($pos = $offset; $pos < $len; $pos++) {
if($this->elements[$pos]->attr($name) == $value) {
return $pos;
}
}
return false;
}
#endregion
#region Element positioning functions
/**
* Adds or inserts an element to the form
*
* @param Element $element
* @param int $pos 0-based position in the form, -1 for at the end
* @return Element
*/
public function addElement(Element $element, $pos = -1) {
if(is_a($element, '\dokuwiki\Form\Form')) throw new \InvalidArgumentException('You can\'t add a form to a form');
if($pos < 0) {
$this->elements[] = $element;
} else {
array_splice($this->elements, $pos, 0, array($element));
}
return $element;
}
/**
* Replaces an existing element with a new one
*
* @param Element $element the new element
* @param int $pos 0-based position of the element to replace
*/
public function replaceElement(Element $element, $pos) {
if(is_a($element, '\dokuwiki\Form\Form')) throw new \InvalidArgumentException('You can\'t add a form to a form');
array_splice($this->elements, $pos, 1, array($element));
}
/**
* Remove an element from the form completely
*
* @param int $pos 0-based position of the element to remove
*/
public function removeElement($pos) {
array_splice($this->elements, $pos, 1);
}
#endregion
#region Element adding functions
/**
* Adds a text input field
*
* @param string $name
* @param string $label
* @param int $pos
* @return InputElement
*/
public function addTextInput($name, $label = '', $pos = -1) {
return $this->addElement(new InputElement('text', $name, $label), $pos);
}
/**
* Adds a password input field
*
* @param string $name
* @param string $label
* @param int $pos
* @return InputElement
*/
public function addPasswordInput($name, $label = '', $pos = -1) {
return $this->addElement(new InputElement('password', $name, $label), $pos);
}
/**
* Adds a radio button field
*
* @param string $name
* @param string $label
* @param int $pos
* @return CheckableElement
*/
public function addRadioButton($name, $label = '', $pos = -1) {
return $this->addElement(new CheckableElement('radio', $name, $label), $pos);
}
/**
* Adds a checkbox field
*
* @param string $name
* @param string $label
* @param int $pos
* @return CheckableElement
*/
public function addCheckbox($name, $label = '', $pos = -1) {
return $this->addElement(new CheckableElement('checkbox', $name, $label), $pos);
}
/**
* Adds a dropdown field
*
* @param string $name
* @param array $options
* @param string $label
* @param int $pos
* @return DropdownElement
*/
public function addDropdown($name, $options, $label = '', $pos = -1) {
return $this->addElement(new DropdownElement($name, $options, $label), $pos);
}
/**
* Adds a textarea field
*
* @param string $name
* @param string $label
* @param int $pos
* @return TextareaElement
*/
public function addTextarea($name, $label = '', $pos = -1) {
return $this->addElement(new TextareaElement($name, $label), $pos);
}
/**
* Adds a simple button, escapes the content for you
*
* @param string $name
* @param string $content
* @param int $pos
* @return Element
*/
public function addButton($name, $content, $pos = -1) {
return $this->addElement(new ButtonElement($name, hsc($content)), $pos);
}
/**
* Adds a simple button, allows HTML for content
*
* @param string $name
* @param string $html
* @param int $pos
* @return Element
*/
public function addButtonHTML($name, $html, $pos = -1) {
return $this->addElement(new ButtonElement($name, $html), $pos);
}
/**
* Adds a label referencing another input element, escapes the label for you
*
* @param string $label
* @param string $for
* @param int $pos
* @return Element
*/
public function addLabel($label, $for='', $pos = -1) {
return $this->addLabelHTML(hsc($label), $for, $pos);
}
/**
* Adds a label referencing another input element, allows HTML for content
*
* @param string $content
* @param string|Element $for
* @param int $pos
* @return Element
*/
public function addLabelHTML($content, $for='', $pos = -1) {
$element = new LabelElement(hsc($content));
if(is_a($for, '\dokuwiki\Form\Element')) {
/** @var Element $for */
$for = $for->id();
}
$for = (string) $for;
if($for !== '') {
$element->attr('for', $for);
}
return $this->addElement($element, $pos);
}
/**
* Add fixed HTML to the form
*
* @param string $html
* @param int $pos
* @return HTMLElement
*/
public function addHTML($html, $pos = -1) {
return $this->addElement(new HTMLElement($html), $pos);
}
/**
* Add a closed HTML tag to the form
*
* @param string $tag
* @param int $pos
* @return TagElement
*/
public function addTag($tag, $pos = -1) {
return $this->addElement(new TagElement($tag), $pos);
}
/**
* Add an open HTML tag to the form
*
* Be sure to close it again!
*
* @param string $tag
* @param int $pos
* @return TagOpenElement
*/
public function addTagOpen($tag, $pos = -1) {
return $this->addElement(new TagOpenElement($tag), $pos);
}
/**
* Add a closing HTML tag to the form
*
* Be sure it had been opened before
*
* @param string $tag
* @param int $pos
* @return TagCloseElement
*/
public function addTagClose($tag, $pos = -1) {
return $this->addElement(new TagCloseElement($tag), $pos);
}
/**
* Open a Fieldset
*
* @param string $legend
* @param int $pos
* @return FieldsetOpenElement
*/
public function addFieldsetOpen($legend = '', $pos = -1) {
return $this->addElement(new FieldsetOpenElement($legend), $pos);
}
/**
* Close a fieldset
*
* @param int $pos
* @return TagCloseElement
*/
public function addFieldsetClose($pos = -1) {
return $this->addElement(new FieldsetCloseElement(), $pos);
}
#endregion
/**
* Adjust the elements so that fieldset open and closes are matching
*/
protected function balanceFieldsets() {
$lastclose = 0;
$isopen = false;
$len = count($this->elements);
for($pos = 0; $pos < $len; $pos++) {
$type = $this->elements[$pos]->getType();
if($type == 'fieldsetopen') {
if($isopen) {
//close previous fieldset
$this->addFieldsetClose($pos);
$lastclose = $pos + 1;
$pos++;
$len++;
}
$isopen = true;
} else if($type == 'fieldsetclose') {
if(!$isopen) {
// make sure there was a fieldsetopen
// either right after the last close or at the begining
$this->addFieldsetOpen('', $lastclose);
$len++;
$pos++;
}
$lastclose = $pos;
$isopen = false;
}
}
// close open fieldset at the end
if($isopen) {
$this->addFieldsetClose();
}
}
/**
* The HTML representation of the whole form
*
* @return string
*/
public function toHTML() {
$this->balanceFieldsets();
$html = '<form ' . buildAttributes($this->attrs()) . '>';
foreach($this->hidden as $name => $value) {
$html .= '<input type="hidden" name="' . $name . '" value="' . formText($value) . '" />';
}
foreach($this->elements as $element) {
$html .= $element->toHTML();
}
$html .= '</form>';
return $html;
}
}