Subclassing * * 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 $attributes = array(); /** * Create a new field. * @param name The internal field name, passed to forms. * @param title The field label. * @param value The value of the field. * @param form Reference to the container form * @param maxLength The Maximum length of the attribute */ function __construct($name, $title = null, $value = null, $form = null, $rightTitle = null) { $this->name = $name; $this->title = ($title === null) ? $name : $title; if($value !== NULL) $this->setValue($value); if($form) $this->setForm($form); 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; } function RightTitle() { return $this->rightTitle; } function setRightTitle($val) { $this->rightTitle = $val; } function LeftTitle() { return $this->leftTitle; } function setLeftTitle($val) { $this->leftTitle = $val; } /** * Set tabindex HTML attribute * (defaults to none). * * @param int $index */ public function setTabIndex($index) { $this->tabIndex = $index; } /** * 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; } /** * 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[$class]); } /** * Set an HTML attribute on the field element, mostly an tag. * * CAUTION Doesn't work on most fields which are composed of more than one HTML form field: * AjaxUniqueTextField, CheckboxSetField, ComplexTableField, CompositeField, ConfirmedPasswordField, CountryDropdownField, * CreditCardField, CurrencyField, DateField, DatetimeField, FieldGroup, GridField, HtmlEditorField, * ImageField, ImageFormAction, InlineFormAction, ListBoxField, etc. * * @param String * @param String */ function setAttribute($name, $value) { $this->attributes[$name] = $value; } /** * Get an HTML attribute defined by the field, or added through {@link setAttribute()}. * Caution: Doesn't work on all fields, see {@link setAttribute()}. * * @return String */ function getAttribute($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' => $this->isDisabled(), ); return array_merge($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 $this; } /** * Set the field name */ function setName($name) { $this->name = $name; } /** * Set the container form. * This is called whenever you create a new form and put fields inside it, so that you don't * have to worry about linking the two. */ function setForm($form) { $this->form = $form; } /** * 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 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 = $messageType; } /** * Set the custom error message to show instead of the default * format of Please Fill In XXX. Different from setError() as * that appends it to the standard error messaging * * @param String Message for the error */ public function setCustomValidationMessage($msg) { $this->customValidationMessage = $msg; } /** * 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 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()){ $result .= "\n"; } elseif($title = $this->LeftTitle()) { $result .= "\n"; } elseif($title = $this->Title()) { $result .= "\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 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; } /** * 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, $subject); } /** * Returns the field type - used by templates. * The field type is the class name with the word Field dropped off the end, all lowercase. * It's handy for assigning HTML classes. Doesn't signify the attribute, * see {link getAttributes()}. * * @return string */ function Type() { return strtolower(ereg_replace('Field$', '', $this->class)); } /** * Construct and return HTML tag. * * @deprecated 3.0 Please define your own FormField template using {@link setFieldTemplate()} * and/or {@link renderFieldTemplate()} * * @todo Transform to static helper method. */ function createTag($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"; 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 : $this->message) = $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); } }