silverstripe-framework/Forms/FormTemplateHelper.php

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<?php
namespace SilverStripe\Forms;
use SilverStripe\Core\Convert;
use ReflectionClass;
use SilverStripe\Core\Injector\Injectable;
/**
* A helper class for managing {@link Form} and {@link FormField} HTML template
* output.
*
* This primarily exists to maintain backwards compatibility between Form and
* FormField template changes since developers may rely on specific HTML output
* in their applications. Any core changes to templates (such as changing ID's)
* may have the potential to silently prevent websites from working.
*
* To provide a form with a custom FormTemplateHelper use the following snippet:
*
* <code>
* $form->setTemplateHelper('ClassName');
* </code>
*
* Globally, the FormTemplateHelper can be set via the {@link Injector} API.
*/
class FormTemplateHelper {
use Injectable;
/**
* @param Form $form
*
* @return string
*/
public function generateFormID($form) {
if($id = $form->getHTMLID()) {
return Convert::raw2htmlid($id);
}
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$reflection = new ReflectionClass($form);
$shortName = str_replace(array('.', '/'), '', $form->getName());
return Convert::raw2htmlid($reflection->getShortName() . '_' . $shortName);
}
/**
* @param FormField $field
*
* @return string
*/
public function generateFieldHolderID($field) {
return $this->generateFieldID($field) . '_Holder';
}
/**
* Generate the field ID value
*
* @param FormField $field
* @return string
*/
public function generateFieldID($field) {
if($form = $field->getForm()) {
return sprintf("%s_%s",
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$this->generateFormID($form),
Convert::raw2htmlid($field->getName())
);
}
return Convert::raw2htmlid($field->getName());
}
}