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<?php
/**
* Represents a field in a form.
*
* A FieldList contains a number of FormField objects which make up the whole of a form.
* In addition to single fields, FormField objects can be "composite", for example, the {@link TabSet}
* field. Composite fields let us define complex forms without having to resort to custom HTML.
*
* <b>Subclassing</b>
*
* Define a {@link dataValue()} method that returns a value suitable for inserting into a single database field.
* For example, you might tidy up the format of a date or currency field.
* Define {@link saveInto()} to totally customise saving.
* For example, data might be saved to the filesystem instead of the data record,
* or saved to a component of the data record instead of the data record itself.
*
* @package forms
* @subpackage core
*/
class FormField extends RequestHandler {
/**
* @var Form
*/
protected $form;
protected $name, $title, $value ,$message, $messageType, $extraClass;
/**
* @var $description string Adds a "title"-attribute to the markup.
* @todo Implement in all subclasses
*/
protected $description;
/**
* @var $extraClasses array Extra CSS-classes for the formfield-container
*/
protected $extraClasses;
public $dontEscape;
/**
* @var $rightTitle string Used in SmallFieldHolder() to force a right-aligned label.
*/
protected $rightTitle;
/**
* @var $leftTitle string Used in SmallFieldHolder() to force a left-aligned label with correct spacing.
* Please use $title for FormFields rendered with FieldHolder().
*/
protected $leftTitle;
/**
* Set the "tabindex" HTML attribute on the field.
*
* @var int
*/
protected $tabIndex;
/**
* Stores a reference to the FieldList that contains this object.
* @var FieldList
*/
protected $containerFieldSet;
/**
* @var $readonly boolean
*/
protected $readonly = false;
/**
* @var $disabled boolean
*/
protected $disabled = false;
/**
* @var String
*/
protected $template = 'FormField';
/**
* @var Custom Validation Message for the Field
*/
protected $customValidationMessage = "";
/**
* Template name to render this FormField field holder into.
* @var string
*/
protected $fieldHolderTemplate = 'FieldHolder';
/**
* @var array All attributes on the form field (not the field holder).
* Partially determined based on other instance properties, please use {@link getAttributes()}.
*/
protected $attributes = array();
/**
* Create a new field.
* @param name The internal field name, passed to forms.
* @param title The field label.
* @param value The value of the field.
*/
function __construct($name, $title = null, $value = null) {
$this->name = $name;
$this->title = ($title === null) ? $name : $title;
if($value !== NULL) $this->setValue($value);
parent::__construct();
}
/**
* Return a Link to this field
*/
function Link($action = null) {
return Controller::join_links($this->form->FormAction(), 'field/' . $this->name, $action);
}
/**
* Returns the HTML ID of the field - used in the template by label tags.
* The ID is generated as FormName_FieldName. All Field functions should ensure
* that this ID is included in the field.
*/
function ID() {
$name = ereg_replace('(^-)|(-$)','',ereg_replace('[^A-Za-z0-9_-]+','-',$this->name));
if($this->form) return $this->form->FormName() . '_' . $name;
else return $name;
}
/**
* Returns the field name - used by templates.
*
* @return string
*/
function getName() {
return $this->name;
}
/**
* @deprecated 3.0 Use {@link getName()}.
*/
public function Name() {
Deprecation::notice('3.0', 'Use getName() instead.');
return $this->getName();
}
/**
* Returns the field message, used by form validation.
* Use {@link setError()} to set this property.
*
* @return string
*/
function Message() {
return $this->message;
}
/**
* Returns the field message type, used by form validation.
* Arbitrary value which is mostly used for CSS classes
* in the rendered HTML, e.g. "required".
* Use {@link setError()} to set this property.
*
* @return string
*/
function MessageType() {
return $this->messageType;
}
/**
* Returns the field value - used by templates.
*/
function Value() {
return $this->value;
}
/**
* Method to save this form field into the given data object.
* By default, makes use of $this->dataValue()
*/
function saveInto(DataObjectInterface $record) {
if($this->name) {
$record->setCastedField($this->name, $this->dataValue());
}
}
/**
* Returns the field value suitable for insertion into the data object
*/
function dataValue() {
return $this->value;
}
/**
* Returns the field label - used by templates.
*/
function Title() {
return $this->title;
}
function setTitle($val) {
$this->title = $val;
return $this;
}
function RightTitle() {
return $this->rightTitle;
}
function setRightTitle($val) {
$this->rightTitle = $val;
return $this;
}
function LeftTitle() {
return $this->leftTitle;
}
function setLeftTitle($val) {
$this->leftTitle = $val;
return $this;
}
/**
* Set tabindex HTML attribute
* (defaults to none).
*
* @param int $index
*/
public function setTabIndex($index) {
$this->tabIndex = $index;
return $this;
}
/**
* Get tabindex (if previously set)
* @return int
*/
public function getTabIndex() {
return $this->tabIndex;
}
/**
* Get tabindex HTML string
*
* @param int $increment Increase current tabindex by this value
* @return string
*/
protected function getTabIndexHTML($increment = 0) {
$tabIndex = (int)$this->getTabIndex() + (int)$increment;
return (is_numeric($tabIndex)) ? ' tabindex = "' . $tabIndex . '"' : '';
}
/**
* Compiles all CSS-classes. Optionally includes a "nolabel"-class
* if no title was set on the formfield.
* Uses {@link Message()} and {@link MessageType()} to add validatoin
* error classes which can be used to style the contained tags.
*
* @return String CSS-classnames
*/
function extraClass() {
$classes = array();
$classes[] = $this->Type();
if($this->extraClasses) $classes = array_merge($classes, array_values($this->extraClasses));
// Allow customization of label and field tag positioning
if(!$this->Title()) $classes[] = "nolabel";
// Allow custom styling of any element in the container based
// on validation errors, e.g. red borders on input tags.
// CSS-Class needs to be different from the one rendered
// through {@link FieldHolder()}
if($this->Message()) $classes[] .= "holder-" . $this->MessageType();
return implode(' ', $classes);
}
/**
* Add a CSS-class to the formfield-container.
*
* @param $class String
*/
function addExtraClass($class) {
$this->extraClasses[$class] = $class;
return $this;
}
/**
* Remove a CSS-class from the formfield-container.
*
* @param $class String
*/
function removeExtraClass($class) {
if(isset($this->extraClasses) && array_key_exists($class, $this->extraClasses)) unset($this->extraClasses[$class]);
return $this;
}
/**
* Set an HTML attribute on the field element, mostly an <input> tag.
*
* CAUTION Doesn't work on most fields which are composed of more than one HTML form field:
* AjaxUniqueTextField, CheckboxSetField, ComplexTableField, CompositeField, ConfirmedPasswordField, CountryDropdownField,
* CreditCardField, CurrencyField, DateField, DatetimeField, FieldGroup, GridField, HtmlEditorField,
* ImageField, ImageFormAction, InlineFormAction, ListBoxField, etc.
*
* @param String
* @param String
*/
function setAttribute($name, $value) {
$this->attributes[$name] = $value;
return $this;
}
/**
* Get an HTML attribute defined by the field, or added through {@link setAttribute()}.
* Caution: Doesn't work on all fields, see {@link setAttribute()}.
*
* @return String
*/
function getAttribute($name) {
$attrs = $this->getAttributes();
return @$attrs[$name];
}
/**
* @return array
*/
function getAttributes() {
$attrs = array(
'type' => 'text',
'name' => $this->getName(),
'value' => $this->Value(),
'class' => $this->extraClass(),
'id' => $this->ID(),
'tabindex' => $this->getTabIndex(),
'disabled' => $this->isDisabled(),
'title' => $this->getDescription(),
);
return array_merge($attrs, $this->attributes);
}
/**
* @param Array Custom attributes to process. Falls back to {@link getAttributes()}.
* If at least one argument is passed as a string, all arguments act as excludes by name.
* @return String HTML attributes, ready for insertion into an HTML tag
*/
function getAttributesHTML($attrs = null) {
$exclude = (is_string($attrs)) ? func_get_args() : null;
if(!$attrs || is_string($attrs)) $attrs = $this->getAttributes();
// Remove empty
$attrs = array_filter((array)$attrs, create_function('$v', 'return ($v || $v === 0);')); ;
// Remove excluded
if($exclude) $attrs = array_diff_key($attrs, array_flip($exclude));
// Create markkup
$parts = array();
foreach($attrs as $name => $value) {
$parts[] = ($value === true) ? "{$name}=\"{$name}\"" : "{$name}=\"" . Convert::raw2att($value) . "\"";
}
return implode(' ', $parts);
}
/**
* Returns a version of a title suitable for insertion into an HTML attribute
*/
function attrTitle() {
return Convert::raw2att($this->title);
}
/**
* Returns a version of a title suitable for insertion into an HTML attribute
*/
function attrValue() {
return Convert::raw2att($this->value);
}
/**
* Set the field value.
* Returns $this.
*/
function setValue($value) {
$this->value = $value; return $this;
return $this;
}
/**
* Set the field name
*/
function setName($name) {
$this->name = $name;
return $this;
}
/**
* Set the container form.
* This is called whenever you create a new form and put fields inside it, so that you don't
* have to worry about linking the two.
*/
function setForm($form) {
$this->form = $form;
return $this;
}
/**
* Get the currently used form.
*
* @return Form
*/
function getForm() {
return $this->form;
}
/**
* @return String
*/
public function getFieldHolderTemplate() {
return $this->fieldHolderTemplate;
}
/**
* Set name of template (without path or extension) for the holder,
* which in turn is responsible for rendering {@link Field()}.
*
* Caution: Not consistently implemented in all subclasses,
* please check the {@link Field()} method on the subclass for support.
*
* @param String
*/
public function setFieldHolderTemplate($template) {
$this->fieldHolderTemplate = $template;
return $this;
}
/**
* Return TRUE if security token protection is enabled on the parent {@link Form}.
*
* @return bool
*/
public function securityTokenEnabled() {
$form = $this->getForm();
if(!$form) return false;
return $form->getSecurityToken()->isEnabled();
}
/**
* Sets the error message to be displayed on the form field
* Set by php validation of the form
*/
function setError($message, $messageType) {
$this->message = $message;
$this->messageType = $messageType;
return $this;
}
/**
* Set the custom error message to show instead of the default
* format of Please Fill In XXX. Different from setError() as
* that appends it to the standard error messaging
*
* @param String Message for the error
*/
public function setCustomValidationMessage($msg) {
$this->customValidationMessage = $msg;
return $this;
}
/**
* Get the custom error message for this form field. If a custom
* message has not been defined then just return blank. The default
* error is defined on {@link Validator}.
*
* @todo Should the default error message be stored here instead
* @return String
*/
public function getCustomValidationMessage() {
return $this->customValidationMessage;
}
/**
* Set name of template (without path or extension).
* Caution: Not consistently implemented in all subclasses,
* please check the {@link Field()} method on the subclass for support.
*
* @param String
*/
function setTemplate($template) {
$this->template = $template;
return $this;
}
/**
* @return String
*/
function getTemplate() {
return $this->template;
}
/**
* Returns the form field - used by templates.
* Although FieldHolder is generally what is inserted into templates, all of the field holder
* templates make use of $Field. It's expected that FieldHolder will give you the "complete"
* representation of the field on the form, whereas Field will give you the core editing widget,
* such as an input tag.
*
* @param array $properties key value pairs of template variables
* @return string
*/
function Field($properties = array()) {
$obj = ($properties) ? $this->customise($properties) : $this;
return $obj->renderWith($this->getTemplate());
}
/**
* Returns a "field holder" for this field - used by templates.
*
* Forms are constructed by concatenating a number of these field holders.
* The default field holder is a label and a form field inside a div.
* @see FieldHolder.ss
*
* @param array $properties key value pairs of template variables
* @return string
*/
function FieldHolder($properties = array()) {
$obj = ($properties) ? $this->customise($properties) : $this;
return $obj->renderWith($this->getFieldHolderTemplate());
}
/**
* Returns a restricted field holder used within things like FieldGroups.
*/
function SmallFieldHolder() {
$result = '';
// set label
if($title = $this->RightTitle()){
$result .= "<label class=\"right\" for=\"" . $this->id() . "\">{$title}</label>\n";
} elseif($title = $this->LeftTitle()) {
$result .= "<label class=\"left\" for=\"" . $this->id() . "\">{$title}</label>\n";
} elseif($title = $this->Title()) {
$result .= "<label for=\"" . $this->id() . "\">{$title}</label>\n";
}
$result .= $this->Field();
return $result;
}
/**
* Returns true if this field is a composite field.
* To create composite field types, you should subclass {@link CompositeField}.
*/
function isComposite() {
return false;
}
/**
* Returns true if this field has its own data.
* Some fields, such as titles and composite fields, don't actually have any data. It doesn't
* make sense for data-focused methods to look at them. By overloading hasData() to return false,
* you can prevent any data-focused methods from looking at it.
*
* @see FieldList::collateDataFields()
*/
function hasData() {
return true;
}
/**
* @return boolean
*/
function isReadonly() {
return $this->readonly;
}
/**
* Sets readonly-flag on form-field. Please use performReadonlyTransformation()
* to actually transform this instance.
* @param $bool boolean Setting "false" has no effect on the field-state.
*/
function setReadonly($bool) {
$this->readonly = $bool;
return $this;
}
/**
* @return boolean
*/
function isDisabled() {
return $this->disabled;
}
/**
* Sets disabed-flag on form-field. Please use performDisabledTransformation()
* to actually transform this instance.
* @param $bool boolean Setting "false" has no effect on the field-state.
*/
function setDisabled($bool) {
$this->disabled = $bool;
return $this;
}
/**
* 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$preparedAttributes />";
}
/**
* javascript handler Functions for each field type by default
* formfield doesnt have a validation function
*
* @todo shouldn't this be an abstract method?
*/
function jsValidation() {
}
/**
* Validation Functions for each field type by default
* formfield doesnt have a validation function
*
* @todo shouldn't this be an abstract method?
*/
function validate() {
return true;
}
/**
* @deprecated 3.0 Use setDescription()
*/
function describe($description) {
Deprecation::notice('3.0', 'Use setDescription()');
$this->setDescription($description);
return $this;
}
/**
* Describe this field, provide help text for it.
* By default, renders as a "title" attribute on the form field.
*
* @return string Description
*/
function setDescription($description) {
$this->description = $description;
return $this;
}
/**
* @return String
*/
function getDescription() {
return $this->description;
}
function debug() {
return "$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;
return $this;
}
function rootFieldSet() {
if(is_object($this->containerFieldSet)) return $this->containerFieldSet->rootFieldSet();
else user_error("rootFieldSet() called on $this->class object without a containerFieldSet", E_USER_ERROR);
}
}
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