silverstripe-framework/forms/ReadonlyField.php

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<?php
/**
* Read-only field to display a non-editable value with a label.
* Consider using an {@link LabelField} if you just need a label-less
* value display.
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*
* @package forms
* @subpackage fields-basic
*/
class ReadonlyField extends FormField {
protected $readonly = true;
/**
* Include a hidden field in the HTML for the readonly field
* @var boolean
*/
protected $includeHiddenField = false;
protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_TEXT;
/**
* If true, a hidden field will be included in the HTML for the readonly field.
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*
* This can be useful if you need to pass the data through on the form submission, as
* long as it's okay than an attacker could change the data before it's submitted.
*
* This is disabled by default as it can introduce security holes if the data is not
* allowed to be modified by the user.
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*
* @param boolean $includeHiddenField
*/
public function setIncludeHiddenField($includeHiddenField) {
$this->includeHiddenField = $includeHiddenField;
}
public function performReadonlyTransformation() {
return clone $this;
}
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/**
* @param array $properties
* @return string
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*/
public function Field($properties = array()) {
// Include a hidden field in the HTML
if($this->includeHiddenField && $this->readonly) {
$hidden = clone $this;
$hidden->setReadonly(false);
return parent::Field($properties) . $hidden->Field($properties);
} else {
return parent::Field($properties);
}
}
public function getAttributes() {
return array_merge(
parent::getAttributes(),
array(
'type' => 'hidden',
'value' => $this->readonly ? null : $this->value,
)
);
}
public function Type() {
return 'readonly';
}
public function castingHelper($field) {
// Get dynamic cast for 'Value' field
if(strcasecmp($field, 'Value') === 0) {
return $this->getValueCast();
}
// Fall back to default casting
return parent::castingHelper($field);
}
/**
* If $dontEscape is true the returned value will be plain text
* and should be escaped in templates via .XML
*
* If $dontEscape is false the returned value will be safely encoded,
* but should not be escaped by the frontend.
*
* @return mixed|string
*/
public function Value() {
// Get raw value
$value = $this->dataValue();
if($value) {
return $value;
}
// "none" text
$label = _t('FormField.NONE', 'none');
return "<i>('{$label}')</i>";
}
/**
* Get custom cating helper for Value() field
*
* @return string
*/
public function getValueCast() {
// Casting class for 'none' text
$value = $this->dataValue();
if(empty($value)) {
return 'HTMLFragment';
}
// Use default casting
return $this->config()->casting['Value'];
}
}