class FormTestDisabledElementsForm

class FormTestDisabledElementsForm extends FormBase {
    
    /**
     * {@inheritdoc}
     */
    public function getFormId() {
        return '_form_test_disabled_elements';
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildForm(array $form, FormStateInterface $form_state) {
        // Elements that take a simple default value.
        foreach ([
            'textfield',
            'textarea',
            'search',
            'tel',
            'hidden',
        ] as $type) {
            $form[$type] = [
                '#type' => $type,
                '#title' => $type,
                '#default_value' => $type,
                '#test_hijack_value' => 'HIJACK',
                '#disabled' => TRUE,
            ];
        }
        // Multiple values option elements, disabled as a whole.
        foreach ([
            'checkboxes',
            'select',
        ] as $type) {
            $form[$type . '_multiple'] = [
                '#type' => $type,
                '#title' => $type . ' (multiple)',
                '#options' => [
                    'test_1' => 'Test 1',
                    'test_2' => 'Test 2',
                ],
                '#multiple' => TRUE,
                '#default_value' => [
                    'test_2' => 'test_2',
                ],
                // The keys of #test_hijack_value need to match the #name of the control.
                // @see FormsTestCase::testDisabledElements()
'#test_hijack_value' => $type == 'select' ? [
                    '' => 'test_1',
                ] : [
                    'test_1' => 'test_1',
                ],
                '#disabled' => TRUE,
            ];
        }
        // Multiple values option elements, only single options disabled.
        $form['checkboxes_single_select'] = [
            '#type' => 'checkboxes',
            '#title' => 'checkboxes (multiple)',
            '#options' => [
                'test_1' => 'Test 1',
                'test_2' => 'Test 2',
            ],
            '#multiple' => TRUE,
            '#default_value' => [
                'test_2' => 'test_2',
            ],
            'test_1' => [
                '#disabled' => TRUE,
            ],
        ];
        $form['checkboxes_single_unselect'] = [
            '#type' => 'checkboxes',
            '#title' => 'checkboxes (multiple)',
            '#options' => [
                'test_1' => 'Test 1',
                'test_2' => 'Test 2',
            ],
            '#multiple' => TRUE,
            '#default_value' => [
                'test_2' => 'test_2',
            ],
            'test_2' => [
                '#disabled' => TRUE,
            ],
        ];
        // Single values option elements.
        foreach ([
            'radios',
            'select',
        ] as $type) {
            $form[$type . '_single'] = [
                '#type' => $type,
                '#title' => $type . ' (single)',
                '#options' => [
                    'test_1' => 'Test 1',
                    'test_2' => 'Test 2',
                ],
                '#multiple' => FALSE,
                '#default_value' => 'test_2',
                '#test_hijack_value' => 'test_1',
                '#disabled' => TRUE,
            ];
        }
        // Checkbox and radio.
        foreach ([
            'checkbox',
            'radio',
        ] as $type) {
            $form[$type . '_unchecked'] = [
                '#type' => $type,
                '#title' => $type . ' (unchecked)',
                '#return_value' => 1,
                '#default_value' => 0,
                '#test_hijack_value' => 1,
                '#disabled' => TRUE,
            ];
            $form[$type . '_checked'] = [
                '#type' => $type,
                '#title' => $type . ' (checked)',
                '#return_value' => 1,
                '#default_value' => 1,
                '#test_hijack_value' => NULL,
                '#disabled' => TRUE,
            ];
        }
        // Weight, number, range.
        foreach ([
            'weight',
            'number',
            'range',
        ] as $type) {
            $form[$type] = [
                '#type' => $type,
                '#title' => $type,
                '#default_value' => 10,
                '#test_hijack_value' => 5,
                '#disabled' => TRUE,
            ];
        }
        // Color.
        $form['color'] = [
            '#type' => 'color',
            '#title' => 'color',
            '#default_value' => '#0000ff',
            '#test_hijack_value' => '#ff0000',
            '#disabled' => TRUE,
        ];
        // The #disabled state should propagate to children.
        $form['disabled_container'] = [
            '#disabled' => TRUE,
        ];
        foreach ([
            'textfield',
            'textarea',
            'hidden',
            'tel',
            'url',
        ] as $type) {
            $form['disabled_container']['disabled_container_' . $type] = [
                '#type' => $type,
                '#title' => $type,
                '#default_value' => $type,
                '#test_hijack_value' => 'HIJACK',
            ];
        }
        // Date.
        $date = new DrupalDateTime('1978-11-01 10:30:00', 'Europe/Berlin');
        // Starting with PHP 5.4.30, 5.5.15, JSON encoded DateTime objects include
        // microseconds. Make sure that the expected value is correct for all
        // versions by encoding and decoding it again instead of hardcoding it.
        // See https://github.com/php/php-src/commit/fdb2709dd27c5987c2d2c8aaf0cdbebf9f17f643
        $expected = json_decode(json_encode($date), TRUE);
        $form['disabled_container']['disabled_container_datetime'] = [
            '#type' => 'datetime',
            '#title' => 'datetime',
            '#default_value' => $date,
            '#expected_value' => $expected,
            '#test_hijack_value' => new DrupalDateTime('1978-12-02 11:30:00', 'Europe/Berlin'),
            '#date_timezone' => 'Europe/Berlin',
        ];
        $form['disabled_container']['disabled_container_date'] = [
            '#type' => 'date',
            '#title' => 'date',
            '#default_value' => '2001-01-13',
            '#expected_value' => '2001-01-13',
            '#test_hijack_value' => '2013-01-01',
            '#date_timezone' => 'Europe/Berlin',
        ];
        // Try to hijack the email field with a valid email.
        $form['disabled_container']['disabled_container_email'] = [
            '#type' => 'email',
            '#title' => 'email',
            '#default_value' => 'foo@example.com',
            '#test_hijack_value' => 'bar@example.com',
        ];
        // Try to hijack the URL field with a valid URL.
        $form['disabled_container']['disabled_container_url'] = [
            '#type' => 'url',
            '#title' => 'url',
            '#default_value' => 'http://example.com',
            '#test_hijack_value' => 'http://example.com/foo',
        ];
        // Text format.
        $form['text_format'] = [
            '#type' => 'text_format',
            '#title' => 'Text format',
            '#disabled' => TRUE,
            '#default_value' => 'Text value',
            '#format' => 'plain_text',
            '#expected_value' => [
                'value' => 'Text value',
                'format' => 'plain_text',
            ],
            '#test_hijack_value' => [
                'value' => 'HIJACK',
                'format' => 'filtered_html',
            ],
        ];
        // Password fields.
        $form['password'] = [
            '#type' => 'password',
            '#title' => 'Password',
            '#disabled' => TRUE,
        ];
        $form['password_confirm'] = [
            '#type' => 'password_confirm',
            '#title' => 'Password confirm',
            '#disabled' => TRUE,
        ];
        // Files.
        $form['file'] = [
            '#type' => 'file',
            '#title' => 'File',
            '#disabled' => TRUE,
        ];
        $form['managed_file'] = [
            '#type' => 'managed_file',
            '#title' => 'Managed file',
            '#disabled' => TRUE,
        ];
        // Buttons.
        $form['image_button'] = [
            '#type' => 'image_button',
            '#value' => 'Image button',
            '#src' => '',
            '#disabled' => TRUE,
        ];
        $form['button'] = [
            '#type' => 'button',
            '#value' => 'Button',
            '#disabled' => TRUE,
        ];
        $form['submit_disabled'] = [
            '#type' => 'submit',
            '#value' => 'Submit',
            '#disabled' => TRUE,
        ];
        $form['submit'] = [
            '#type' => 'submit',
            '#value' => t('Submit'),
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitForm(array &$form, FormStateInterface $form_state) {
        $form_state->setResponse(new JsonResponse($form_state->getValues()));
    }

}