diff --git a/src/Element.php b/src/Element.php
index fa363108..32381328 100644
--- a/src/Element.php
+++ b/src/Element.php
@@ -33,6 +33,8 @@ class Element extends DOMElement {
protected $liveProperty_classList;
/** @var StringMap */
protected $liveProperty_dataset;
+ /** @var Array */
+ static public $formControlElements = ['button', 'fieldset', 'input', 'object', 'output', 'select', 'textarea'];
/**
* returns true if the element would be selected by the specified selector
@@ -248,6 +250,22 @@ public function prop_set_selected(bool $selected):bool {
return $this->selected;
}
+ public function prop_get_form() {
+ if (\in_array($this->tagName, self::$formControlElements)) {
+ if ($this->tagName === "input" && $this->getAttribute("type") === "image")
+ return null;
+
+ if ($this->hasAttribute("form")) {
+ return $this->getRootDocument()->getElementById($this->getAttribute("form"));
+ }
+ else {
+ return $this->closest('form');
+ }
+ }
+
+ return null;
+ }
+
protected function createDataset():StringMap {
return new StringMap(
$this,
diff --git a/test/unit/ElementTest.php b/test/unit/ElementTest.php
index 4bbb7627..22b30742 100644
--- a/test/unit/ElementTest.php
+++ b/test/unit/ElementTest.php
@@ -324,4 +324,65 @@ public function testDatasetIssetUnset() {
unset($element->dataset->name);
self::assertFalse(isset($element->dataset->name));
}
+
+ public function testFormControlElementsCanHaveFormProperty() {
+ $document = new HTMLDocument(Helper::HTML_FORM_PROPERTY);
+ $form = $document->getElementById('form_2');
+
+ $input = $document->getElementById('f2');
+ self::assertEquals($form, $input->form);
+
+ $button = $document->getElementById('f4');
+ self::assertEquals($form, $button->form);
+
+ $fieldset = $document->getElementById('f5');
+ self::assertEquals($form, $fieldset->form);
+
+ $input = $document->getElementById('f6');
+ self::assertEquals($form, $input->form);
+
+ $object = $document->getElementById('f7');
+ self::assertEquals($form, $object->form);
+
+ $output = $document->getElementById('f8');
+ self::assertEquals($form, $output->form);
+
+ $select = $document->getElementById('f9');
+ self::assertEquals($form, $select->form);
+ }
+
+ public function testFormControlElementReturnsParentFormAsFormPropertyIfItDoesNotHaveFormAttribute() {
+ $document = new HTMLDocument(Helper::HTML_FORM_PROPERTY);
+ $form = $document->getElementById('form_1');
+
+ $input = $document->getElementById('f1');
+ self::assertEquals($form, $input->form);
+
+ $button = $document->getElementById('f3');
+ self::assertEquals($form, $button->form);
+ }
+
+ public function testFormControlElementReturnsNullIfItDoesNotHaveFormAttributeAndDoesNotHaveParentForm() {
+ $document = new HTMLDocument(Helper::HTML_FORM_PROPERTY);
+
+ $input = $document->getElementById('f11');
+ self::assertEquals(NULL, $input->form);
+ }
+
+ public function testNonControlElementRetursNullAsFormProperty() {
+ $document = new HTMLDocument(Helper::HTML_FORM_PROPERTY);
+
+ $span = $document->getElementById('non_form_control_1');
+ self::assertEquals(NULL, $span->form);
+
+ $span = $document->getElementById('non_form_control_2');
+ self::assertEquals(NULL, $span->form);
+ }
+
+ public function testInputElementWithTypeImagetReturnsNullAsFormProperty() {
+ $document = new HTMLDocument(Helper::HTML_FORM_PROPERTY);
+
+ $input = $document->getElementById('f12');
+ self::assertEquals(NULL, $input->form);
+ }
}
\ No newline at end of file
diff --git a/test/unit/Helper/Helper.php b/test/unit/Helper/Helper.php
index 5f6250c6..8cfccd41 100644
--- a/test/unit/Helper/Helper.php
+++ b/test/unit/Helper/Helper.php
@@ -293,4 +293,39 @@ class Helper {
HTML;
+const HTML_FORM_PROPERTY = <<
+
+
+
+ Test HTML
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+HTML;
+
}
\ No newline at end of file