563 lines
15 KiB
PHP
563 lines
15 KiB
PHP
<?php
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/**
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* Represents a field in a form.
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* A FieldSet contains a number of FormField objects which make up the whole of a form.
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* In addition to single fields, FormField objects can be "composite", for example, the {@link TabSet}
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* field. Composite fields let us define complex forms without having to resort to custom HTML.
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* @package forms
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* @subpackage core
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*/
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class FormField extends RequestHandler {
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protected $form;
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protected $name, $title, $value ,$message, $messageType, $extraClass;
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/**
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* @var $description string Adds a "title"-attribute to the markup.
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* @todo Implement in all subclasses
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*/
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protected $description;
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/**
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* @var $extraClasses array Extra CSS-classes for the formfield-container
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*/
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protected $extraClasses;
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public $dontEscape;
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/**
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* @var $rightTitle string Used in SmallFieldHolder() to force a right-aligned label.
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*/
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protected $rightTitle;
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/**
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* @var $leftTitle string Used in SmallFieldHolder() to force a left-aligned label with correct spacing.
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* Please use $title for FormFields rendered with DefaultFieldHolder.
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*/
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protected $leftTitle;
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/**
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* Set the "tabindex" HTML attribute on the field.
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*
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* @var int
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*/
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protected $tabIndex;
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/**
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* Stores a reference to the FieldSet that contains this object.
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* @var FieldSet
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*/
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protected $containerFieldSet;
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/**
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* @var $readonly boolean
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*/
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protected $readonly = false;
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/**
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* @var $disabled boolean
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*/
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protected $disabled = false;
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/**
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* Create a new field.
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* @param name The internal field name, passed to forms.
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* @param title The field label.
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* @param value The value of the field.
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* @param form Reference to the container form
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* @param maxLength The Maximum length of the attribute
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*/
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function __construct($name, $title = null, $value = null, $form = null, $rightTitle = null) {
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$this->name = $name;
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$this->title = ($title === null) ? $name : $title;
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if(isset($value)) $this->value = $value;
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if($form) $this->setForm($form);
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parent::__construct();
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}
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/**
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* Return a Link to this field
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*/
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function Link() {
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return Controller::join_links($this->form->FormAction(), 'field/' . $this->name);
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}
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/**
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* Returns the HTML ID of the field - used in the template by label tags.
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* The ID is generated as FormName_FieldName. All Field functions should ensure
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* that this ID is included in the field.
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*/
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function id() {
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$name = ereg_replace('(^-)|(-$)','',ereg_replace('[^A-Za-z0-9_-]+','-',$this->name));
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if($this->form) return $this->form->FormName() . '_' . $name;
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else return $name;
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}
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/**
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* Returns the field name - used by templates.
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*/
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function Name() {
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return $this->name;
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}
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function attrName() {
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return $this->name;
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}
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/**
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* Returns the field message, used by form validation
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*/
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function Message(){
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return $this->message;
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}
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/**
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* Returns the field message type, used by form validation
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*/
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function MessageType(){
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return $this->messageType;
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}
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/**
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* Returns the field value - used by templates.
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*/
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function Value() {
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return $this->value;
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}
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/**
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* Method to save this form field into the given data object.
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* By default, makes use of $this->dataValue()
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*/
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function saveInto(DataObjectInterface $record) {
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if($this->name) {
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$record->setCastedField($this->name, $this->dataValue());
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}
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}
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/**
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* Returns the field value suitable for insertion into the data object
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*/
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function dataValue() {
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return $this->value;
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}
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/**
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* Returns the field label - used by templates.
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*/
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function Title() {
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return $this->title;
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}
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function setTitle($val) {
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$this->title = $val;
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}
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function RightTitle() {
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return $this->rightTitle;
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}
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function setRightTitle($val) {
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$this->rightTitle = $val;
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}
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function LeftTitle() {
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return $this->leftTitle;
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}
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function setLeftTitle($val) {
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$this->leftTitle = $val;
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}
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/**
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* Set tabindex HTML attribute
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* (defaults to none).
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*
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* @param int $index
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*/
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public function setTabIndex($index) {
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$this->tabIndex = $index;
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}
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/**
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* Get tabindex (if previously set)
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*
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* @return int
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*/
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public function getTabIndex() {
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return $this->tabIndex;
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}
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/**
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* Get tabindex HTML string
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*
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* @param int $increment Increase current tabindex by this value
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* @return string
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*/
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protected function getTabIndexHTML($increment = 0) {
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$tabIndex = (int)$this->getTabIndex() + (int)$increment;
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return (is_numeric($tabIndex)) ? ' tabindex = "' . $tabIndex . '"' : '';
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}
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/**
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* Compiles all CSS-classes. Optionally includes a "nolabel"-class
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* if no title was set on the formfield.
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*
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* @return String CSS-classnames
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*/
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function extraClass() {
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$output = "";
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if(is_array($this->extraClasses)) {
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$output = " " . implode($this->extraClasses, " ");
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}
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if(!$this->Title()) $output .= " nolabel";
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return $output;
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}
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/**
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* Add a CSS-class to the formfield-container.
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*
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* @param $class String
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*/
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function addExtraClass($class) {
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$this->extraClasses[$class] = $class;
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}
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/**
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* Remove a CSS-class from the formfield-container.
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*
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* @param $class String
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*/
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function removeExtraClass($class) {
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if(array_key_exists($class, $this->extraClasses)) unset($this->extraClasses[$class]);
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}
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/**
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* Returns a version of a title suitable for insertion into an HTML attribute
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*/
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function attrTitle() {
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return Convert::raw2att($this->title);
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}
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/**
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* Returns a version of a title suitable for insertion into an HTML attribute
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*/
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function attrValue() {
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return Convert::raw2att($this->value);
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}
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/**
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* Set the field value.
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* Returns $this.
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*/
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function setValue($value) {
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$this->value = $value; return $this;
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}
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/**
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* Set the field name
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*/
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function setName($name) {
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$this->name = $name;
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}
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/**
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* Set the container form.
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* This is called whenever you create a new form and put fields inside it, so that you don't
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* have to worry about linking the two.
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*/
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function setForm($form) {
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$this->form = $form;
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}
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/**
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* Get the currently used form.
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*
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* @return Form
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*/
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function getForm() {
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return $this->form;
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}
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/**
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* Sets the error message to be displayed on the form field
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* Set by php validation of the form
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*/
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function setError($message,$messageType){
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$this->message = $message;
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$this->messageType = $messageType;
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}
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/**
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* Returns the form field - used by templates.
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* Although FieldHolder is generally what is inserted into templates, all of the field holder
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* templates make use of $Field. It's expected that FieldHolder will give you the "complete"
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* representation of the field on the form, whereas Field will give you the core editing widget,
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* such as an input tag.
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*
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* Our base FormField class just returns a span containing the value. This should be overridden!
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*/
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function Field() {
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if($this->value) $value = $this->dontEscape ? ($this->reserveNL ? Convert::raw2xml($this->value) : $this->value) : Convert::raw2xml($this->value);
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else $value = '<i>(' . _t('FormField.NONE', 'none') . ')</i>';
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$attributes = array(
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'id' => $this->id(),
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'class' => 'readonly' . ($this->extraClass() ? $this->extraClass() : '')
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);
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$hiddenAttributes = array(
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'type' => 'hidden',
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'name' => $this->name,
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'value' => $this->value,
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'tabindex' => $this->getTabIndex()
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);
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$containerSpan = $this->createTag('span', $attributes, $value);
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$hiddenInput = $this->createTag('input', $hiddenAttributes);
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return $containerSpan . "\n" . $hiddenInput;
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}
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/**
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* Returns a "Field Holder" for this field - used by templates.
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* Forms are constructed from by concatenating a number of these field holders. The default
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* field holder is a label and form field inside a paragraph tag.
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*
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* Composite fields can override FieldHolder to create whatever visual effects you like. It's
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* a good idea to put the actual HTML for field holders into templates. The default field holder
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* is the DefaultFieldHolder template. This lets you override the HTML for specific sites, if it's
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* necessary.
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*
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* @todo Add "validationError" if needed.
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*/
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function FieldHolder() {
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$Title = $this->XML_val('Title');
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$Message = $this->XML_val('Message');
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$MessageType = $this->XML_val('MessageType');
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$RightTitle = $this->XML_val('RightTitle');
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$Type = $this->XML_val('Type');
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$extraClass = $this->XML_val('extraClass');
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$Name = $this->XML_val('Name');
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$Field = $this->XML_val('Field');
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$titleBlock = (!empty($Title)) ? "<label class=\"left\" for=\"{$this->id()}\">$Title</label>" : "";
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$messageBlock = (!empty($Message)) ? "<span class=\"message $MessageType\">$Message</span>" : "";
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$rightTitleBlock = (!empty($RightTitle)) ? "<label class=\"right\" for=\"{$this->id()}\">$RightTitle</label>" : "";
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return <<<HTML
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<div id="$Name" class="field $Type $extraClass">$titleBlock<div class="middleColumn">$Field</div>$rightTitleBlock$messageBlock</div>
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HTML;
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}
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/**
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* Returns a restricted field holder used within things like FieldGroups.
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*/
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function SmallFieldHolder() {
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$result = '';
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// set label
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if($title = $this->RightTitle()){
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$result .= "<label class=\"right\" for=\"" . $this->id() . "\">{$title}</label>\n";
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} elseif($title = $this->LeftTitle()) {
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$result .= "<label class=\"left\" for=\"" . $this->id() . "\">{$title}</label>\n";
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} elseif($title = $this->Title()) {
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$result .= "<label for=\"" . $this->id() . "\">{$title}</label>\n";
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}
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$result .= $this->Field();
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return $result;
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}
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/**
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* Returns true if this field is a composite field.
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* To create composite field types, you should subclass {@link CompositeField}.
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*/
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function isComposite() { return false; }
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/**
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* Returns true if this field has its own data.
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* Some fields, such as titles and composite fields, don't actually have any data. It doesn't
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* make sense for data-focused methods to look at them. By overloading hasData() to return false,
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* you can prevent any data-focused methods from looking at it.
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*
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* @see FieldSet::collateDataFields()
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*/
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function hasData() { return true; }
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/**
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* @return boolean
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*/
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function isReadonly() {
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return $this->readonly;
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}
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/**
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* Sets readonly-flag on form-field. Please use performReadonlyTransformation()
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* to actually transform this instance.
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* @param $bool boolean Setting "false" has no effect on the field-state.
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*/
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function setReadonly($bool) {
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$this->readonly = $bool;
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}
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/**
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* @return boolean
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*/
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function isDisabled() {
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return $this->disabled;
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}
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/**
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* Sets disabed-flag on form-field. Please use performDisabledTransformation()
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* to actually transform this instance.
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* @param $bool boolean Setting "false" has no effect on the field-state.
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*/
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function setDisabled($bool) {
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$this->disabled = $bool;
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}
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/**
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* Returns a readonly version of this field
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*/
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function performReadonlyTransformation() {
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$field = new ReadonlyField($this->name, $this->title, $this->value);
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$field->addExtraClass($this->extraClass());
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$field->setForm($this->form);
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return $field;
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}
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/**
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* Return a disabled version of this field
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*/
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function performDisabledTransformation() {
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$clone = clone $this;
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$disabledClassName = $clone->class . '_Disabled';
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if( ClassInfo::exists( $disabledClassName ) )
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return new $disabledClassName( $this->name, $this->title, $this->value );
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elseif($clone->hasMethod('setDisabled')){
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$clone->setDisabled(true);
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return $clone;
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}else{
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return $this->performReadonlyTransformation();
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}
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}
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function transform(FormTransformation $trans) {
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return $trans->transform($this);
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}
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function hasClass($class){
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$patten = '/'.strtolower($class).'/i';
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$subject = strtolower($this->class." ".$this->extraClass());
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return preg_match($patten, $subject);
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}
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/**
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* Returns the field type - used by templates.
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* The field type is the class name with the word Field dropped off the end, all lowercase.
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* It's handy for assigning HTML classes.
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*/
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function Type() {return strtolower(ereg_replace('Field$','',$this->class)); }
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/**
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* Construct and return HTML tag
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*/
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function createTag($tag, $attributes, $content = null) {
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$preparedAttributes = '';
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foreach($attributes as $k => $v) {
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// Note: as indicated by the $k == value item here; the decisions over what to include in the attributes can sometimes get finicky
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if(!empty($v) || $v === '0' || $k == 'value') $preparedAttributes .= " $k=\"" . Convert::raw2att($v) . "\"";
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}
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if($content || $tag != 'input') return "<$tag$preparedAttributes>$content</$tag>";
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else return "<$tag$preparedAttributes />";
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}
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/**
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* javascript handler Functions for each field type by default
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* formfield doesnt have a validation function
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*
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* @todo shouldn't this be an abstract method?
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*/
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function jsValidation() {
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}
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/**
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* Validation Functions for each field type by default
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* formfield doesnt have a validation function
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*
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* @todo shouldn't this be an abstract method?
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*/
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function validate() {
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return true;
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}
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/**
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* Describe this field, provide help text for it.
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* The function returns this so it can be used like this:
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* $action = FormAction::create('submit', 'Submit')->describe("Send your changes to be approved")
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*/
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function describe($description) {
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$this->description = $description;
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return $this;
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}
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function debug() {
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return "$this->class ($this->name: $this->title : <font style='color:red;'>$this->message</font>) = $this->value";
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}
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/**
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* This function is used by the template processor. If you refer to a field as a $ variable, it
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* will return the $Field value.
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*/
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function forTemplate() {
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return $this->Field();
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}
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function Required() {
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if($this->form && ($validator = $this->form->Validator)) {
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return $validator->fieldIsRequired($this->name);
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}
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}
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/**
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* Takes a fieldname and converts camelcase to spaced
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* words. Also resolves combined fieldnames with dot syntax
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* to spaced words.
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*
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* @example 'TotalAmount' will return 'Total Amount'
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* @example 'Organisation.ZipCode' will return 'Organisation Zip Code'
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*
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* @param string $fieldName
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* @return string
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*/
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public function name_to_label($fieldName) {
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if(strpos($fieldName, '.') !== false) {
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$parts = explode('.', $fieldName);
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$label = $parts[count($parts)-2] . ' ' . $parts[count($parts)-1];
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} else {
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$label = $fieldName;
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}
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$label = preg_replace("/([a-z]+)([A-Z])/","$1 $2", $label);
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return $label;
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}
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/**
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* Set the fieldset that contains this field.
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*
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* @param FieldSet $containerFieldSet
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*/
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function setContainerFieldSet($containerFieldSet) {
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$this->containerFieldSet = $containerFieldSet;
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}
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function rootFieldSet() {
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if(is_object($this->containerFieldSet)) return $this->containerFieldSet->rootFieldSet();
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else user_error("rootFieldSet() called on $this->class object without a containerFieldSet", E_USER_ERROR);
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}
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}
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?>
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