751 lines
19 KiB
PHP
751 lines
19 KiB
PHP
<?php
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/**
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* Represents a field in a form.
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*
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* A FieldList 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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*
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* <b>Subclassing</b>
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*
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* Define a {@link dataValue()} method that returns a value suitable for inserting into a single database field.
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* For example, you might tidy up the format of a date or currency field.
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* Define {@link saveInto()} to totally customise saving.
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* For example, data might be saved to the filesystem instead of the data record,
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* or saved to a component of the data record instead of the data record itself.
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*
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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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/**
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* @var Form
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*/
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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 FieldHolder().
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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 FieldList that contains this object.
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* @var FieldList
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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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* @var String
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*/
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protected $template = 'FormField';
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/**
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* @var Custom Validation Message for the Field
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*/
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protected $customValidationMessage = "";
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/**
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* Template name to render this FormField field holder into.
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* @var string
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*/
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protected $fieldHolderTemplate = 'FieldHolder';
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/**
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* @var array All attributes on the form field (not the field holder).
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* Partially determined based on other instance properties, please use {@link getAttributes()}.
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*/
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protected $attributes = array();
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/**
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* Create a new field.
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* @param name The internal field name, passed to forms.
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* @param title The field label.
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* @param value The value of the field.
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* @param form Reference to the container form
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* @param maxLength The Maximum length of the attribute
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*/
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function __construct($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 : $title;
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if($value !== NULL) $this->setValue($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($action = null) {
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return Controller::join_links($this->form->FormAction(), 'field/' . $this->name, $action);
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}
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/**
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* Returns the HTML ID of the field - used in the template by label tags.
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* The ID is generated as FormName_FieldName. All Field functions should ensure
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* that this ID is included in the field.
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*/
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function ID() {
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$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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* @return string
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*/
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function getName() {
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return $this->name;
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}
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/**
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* @deprecated 3.0 Use {@link getName()}.
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*/
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public function Name() {
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Deprecation::notice('3.0', 'Use getName() instead.');
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return $this->getName();
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}
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/**
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* Returns the field message, used by form validation.
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* Use {@link setError()} to set this property.
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*
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* @return string
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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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* Arbitrary value which is mostly used for CSS classes
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* in the rendered HTML, e.g. "required".
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* Use {@link setError()} to set this property.
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*
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* @return string
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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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* @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 = "' . $tabIndex . '"' : '';
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}
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/**
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* Compiles all CSS-classes. Optionally includes a "nolabel"-class
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* if no title was set on the formfield.
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* Uses {@link Message()} and {@link MessageType()} to add validatoin
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* error classes which can be used to style the contained tags.
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*
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* @return String CSS-classnames
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*/
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function extraClass() {
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$classes = array();
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$classes[] = $this->Type();
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if($this->extraClasses) $classes = array_merge($classes, array_values($this->extraClasses));
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// Allow customization of label and field tag positioning
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if(!$this->Title()) $classes[] = "nolabel";
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// Allow custom styling of any element in the container based
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// on validation errors, e.g. red borders on input tags.
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// CSS-Class needs to be different from the one rendered
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// through {@link FieldHolder()}
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if($this->Message()) $classes[] .= "holder-" . $this->MessageType();
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return implode(' ', $classes);
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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(isset($this->extraClasses) && array_key_exists($class, $this->extraClasses)) unset($this->extraClasses[$class]);
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}
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/**
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* Set an HTML attribute on the field element, mostly an <input> tag.
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*
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* CAUTION Doesn't work on most fields which are composed of more than one HTML form field:
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* AjaxUniqueTextField, CheckboxSetField, ComplexTableField, CompositeField, ConfirmedPasswordField, CountryDropdownField,
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* CreditCardField, CurrencyField, DateField, DatetimeField, FieldGroup, GridField, HtmlEditorField,
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* ImageField, ImageFormAction, InlineFormAction, ListBoxField, etc.
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*
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* @param String
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* @param String
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*/
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function setAttribute($name, $value) {
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$this->attributes[$name] = $value;
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}
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/**
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* Get an HTML attribute defined by the field, or added through {@link setAttribute()}.
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* Caution: Doesn't work on all fields, see {@link setAttribute()}.
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*
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* @return String
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*/
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function getAttribute($name) {
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$attrs = $this->getAttributes();
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return @$attrs[$name];
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}
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/**
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* @return array
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*/
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function getAttributes() {
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$attrs = array(
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'type' => 'text',
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'name' => $this->getName(),
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'value' => $this->Value(),
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'class' => $this->extraClass(),
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'id' => $this->ID(),
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'tabindex' => $this->getTabIndex(),
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'disabled' => $this->isDisabled(),
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);
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return array_merge($attrs, $this->attributes);
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}
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/**
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* @param Array Custom attributes to process. Falls back to {@link getAttributes()}.
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* If at least one argument is passed as a string, all arguments act as excludes by name.
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* @return String HTML attributes, ready for insertion into an HTML tag
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*/
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function getAttributesHTML($attrs = null) {
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$exclude = (is_string($attrs)) ? func_get_args() : null;
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if(!$attrs || is_string($attrs)) $attrs = $this->getAttributes();
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// Remove empty
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$attrs = array_filter((array)$attrs, create_function('$v', 'return ($v || $v === 0);')); ;
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// Remove excluded
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if($exclude) $attrs = array_diff_key($attrs, array_flip($exclude));
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// Create markkup
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$parts = array();
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foreach($attrs as $name => $value) {
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$parts[] = ($value === true) ? "{$name}=\"{$name}\"" : "{$name}=\"" . Convert::raw2att($value) . "\"";
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}
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return implode(' ', $parts);
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}
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/**
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* Returns a version of a title suitable for insertion into an HTML attribute
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*/
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function attrTitle() {
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return Convert::raw2att($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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* @return String
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*/
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public function getFieldHolderTemplate() {
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return $this->fieldHolderTemplate;
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}
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/**
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* Set name of template (without path or extension) for the holder,
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* which in turn is responsible for rendering {@link Field()}.
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*
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* Caution: Not consistently implemented in all subclasses,
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* please check the {@link Field()} method on the subclass for support.
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*
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* @param String
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*/
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public function setFieldHolderTemplate($template) {
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$this->fieldHolderTemplate = $template;
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}
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/**
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* Return TRUE if security token protection is enabled on the parent {@link Form}.
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*
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* @return bool
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*/
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public function securityTokenEnabled() {
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$form = $this->getForm();
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if(!$form) return false;
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return $form->getSecurityToken()->isEnabled();
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}
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/**
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* Sets the error message to be displayed on the form field
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* Set by php validation of the form
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*/
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function setError($message, $messageType) {
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$this->message = $message;
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$this->messageType = $messageType;
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}
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/**
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* Set the custom error message to show instead of the default
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* format of Please Fill In XXX. Different from setError() as
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* that appends it to the standard error messaging
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*
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* @param String Message for the error
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*/
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public function setCustomValidationMessage($msg) {
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$this->customValidationMessage = $msg;
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}
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/**
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* Get the custom error message for this form field. If a custom
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* message has not been defined then just return blank. The default
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* error is defined on {@link Validator}.
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*
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* @todo Should the default error message be stored here instead
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* @return String
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*/
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public function getCustomValidationMessage() {
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return $this->customValidationMessage;
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}
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/**
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* Set name of template (without path or extension).
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* Caution: Not consistently implemented in all subclasses,
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* please check the {@link Field()} method on the subclass for support.
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*
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* @param String
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*/
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function setTemplate($template) {
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$this->template = $template;
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}
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/**
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* @return String
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*/
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function getTemplate() {
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return $this->template;
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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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* @param array $properties key value pairs of template variables
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* @return string
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*/
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function Field($properties = array()) {
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$obj = ($properties) ? $this->customise($properties) : $this;
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return $obj->renderWith($this->getTemplate());
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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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*
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* Forms are constructed by concatenating a number of these field holders.
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* The default field holder is a label and a form field inside a div.
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* @see FieldHolder.ss
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*
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* @param array $properties key value pairs of template variables
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* @return string
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*/
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function FieldHolder($properties = array()) {
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$obj = ($properties) ? $this->customise($properties) : $this;
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return $obj->renderWith($this->getFieldHolderTemplate());
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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() {
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return false;
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}
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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 FieldList::collateDataFields()
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*/
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function hasData() {
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return true;
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}
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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;
|
|
}
|
|
|
|
/**
|
|
* Returns a readonly version of this field
|
|
*/
|
|
function performReadonlyTransformation() {
|
|
$field = new ReadonlyField($this->name, $this->title, $this->value);
|
|
$field->addExtraClass($this->extraClass());
|
|
$field->setForm($this->form);
|
|
return $field;
|
|
}
|
|
|
|
/**
|
|
* Return a disabled version of this field
|
|
*/
|
|
function performDisabledTransformation() {
|
|
$clone = clone $this;
|
|
$disabledClassName = $clone->class . '_Disabled';
|
|
if( ClassInfo::exists( $disabledClassName ) )
|
|
return new $disabledClassName( $this->name, $this->title, $this->value );
|
|
elseif($clone->hasMethod('setDisabled')){
|
|
$clone->setDisabled(true);
|
|
return $clone;
|
|
}else{
|
|
return $this->performReadonlyTransformation();
|
|
}
|
|
}
|
|
|
|
function transform(FormTransformation $trans) {
|
|
return $trans->transform($this);
|
|
}
|
|
|
|
function hasClass($class){
|
|
$patten = '/'.strtolower($class).'/i';
|
|
$subject = strtolower($this->class." ".$this->extraClass());
|
|
return preg_match($patten, $subject);
|
|
}
|
|
|
|
/**
|
|
* Returns the field type - used by templates.
|
|
* The field type is the class name with the word Field dropped off the end, all lowercase.
|
|
* It's handy for assigning HTML classes. Doesn't signify the <input type> attribute,
|
|
* see {link getAttributes()}.
|
|
*
|
|
* @return string
|
|
*/
|
|
function Type() {
|
|
return strtolower(ereg_replace('Field$', '', $this->class));
|
|
}
|
|
|
|
/**
|
|
* Construct and return HTML tag.
|
|
*
|
|
* @deprecated 3.0 Please define your own FormField template using {@link setFieldTemplate()}
|
|
* and/or {@link renderFieldTemplate()}
|
|
*
|
|
* @todo Transform to static helper method.
|
|
*/
|
|
function createTag($tag, $attributes, $content = null) {
|
|
$preparedAttributes = '';
|
|
foreach($attributes as $k => $v) {
|
|
// Note: as indicated by the $k == value item here; the decisions over what to include in the attributes can sometimes get finicky
|
|
if(!empty($v) || $v === '0' || $k == 'value') $preparedAttributes .= " $k=\"" . Convert::raw2att($v) . "\"";
|
|
}
|
|
|
|
if($content || $tag != 'input') return "<$tag$preparedAttributes>$content</$tag>";
|
|
else return "<$tag$preparedAttributes />";
|
|
}
|
|
|
|
/**
|
|
* javascript handler Functions for each field type by default
|
|
* formfield doesnt have a validation function
|
|
*
|
|
* @todo shouldn't this be an abstract method?
|
|
*/
|
|
function jsValidation() {
|
|
}
|
|
|
|
/**
|
|
* Validation Functions for each field type by default
|
|
* formfield doesnt have a validation function
|
|
*
|
|
* @todo shouldn't this be an abstract method?
|
|
*/
|
|
function validate() {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Describe this field, provide help text for it.
|
|
* The function returns this so it can be used like this:
|
|
* $action = FormAction::create('submit', 'Submit')->describe("Send your changes to be approved")
|
|
*
|
|
* @return string Description
|
|
*/
|
|
function describe($description) {
|
|
$this->description = $description;
|
|
return $this;
|
|
}
|
|
|
|
function debug() {
|
|
return "$this->class ($this->name: $this->title : <font style='color:red;'>$this->message</font>) = $this->value";
|
|
}
|
|
|
|
/**
|
|
* This function is used by the template processor. If you refer to a field as a $ variable, it
|
|
* will return the $Field value.
|
|
*/
|
|
function forTemplate() {
|
|
return $this->Field();
|
|
}
|
|
|
|
/**
|
|
* @uses Validator->fieldIsRequired()
|
|
* @return boolean
|
|
*/
|
|
function Required() {
|
|
if($this->form && ($validator = $this->form->Validator)) {
|
|
return $validator->fieldIsRequired($this->name);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Takes a fieldname and converts camelcase to spaced
|
|
* words. Also resolves combined fieldnames with dot syntax
|
|
* to spaced words.
|
|
*
|
|
* Examples:
|
|
* - 'TotalAmount' will return 'Total Amount'
|
|
* - 'Organisation.ZipCode' will return 'Organisation Zip Code'
|
|
*
|
|
* @param string $fieldName
|
|
* @return string
|
|
*/
|
|
public function name_to_label($fieldName) {
|
|
if(strpos($fieldName, '.') !== false) {
|
|
$parts = explode('.', $fieldName);
|
|
$label = $parts[count($parts)-2] . ' ' . $parts[count($parts)-1];
|
|
} else {
|
|
$label = $fieldName;
|
|
}
|
|
$label = preg_replace("/([a-z]+)([A-Z])/","$1 $2", $label);
|
|
|
|
return $label;
|
|
}
|
|
|
|
/**
|
|
* Set the FieldList that contains this field.
|
|
*
|
|
* @param FieldList $containerFieldSet
|
|
*/
|
|
function setContainerFieldSet($containerFieldSet) {
|
|
$this->containerFieldSet = $containerFieldSet;
|
|
}
|
|
|
|
function rootFieldSet() {
|
|
if(is_object($this->containerFieldSet)) return $this->containerFieldSet->rootFieldSet();
|
|
else user_error("rootFieldSet() called on $this->class object without a containerFieldSet", E_USER_ERROR);
|
|
}
|
|
|
|
} |