class LayoutBuilderDisableInteractionsTest

class LayoutBuilderDisableInteractionsTest extends WebDriverTestBase {
    use ContextualLinkClickTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'block',
        'block_content',
        'filter',
        'filter_test',
        'layout_builder',
        'node',
        'search',
        'contextual',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'classy';
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->createContentType([
            'type' => 'bundle_with_section_field',
        ]);
        $this->createNode([
            'type' => 'bundle_with_section_field',
            'title' => 'The first node title',
            'body' => [
                [
                    'value' => 'Node body',
                ],
            ],
        ]);
        $bundle = BlockContentType::create([
            'id' => 'basic',
            'label' => 'Basic block',
            'revision' => 1,
        ]);
        $bundle->save();
        block_content_add_body_field($bundle->id());
        BlockContent::create([
            'type' => 'basic',
            'info' => 'Block with link',
            'body' => [
                // Create a link that should be disabled in Layout Builder preview.
'value' => '<a id="link-that-should-be-disabled" href="/search/node">Take me away</a>',
                'format' => 'full_html',
            ],
        ])->save();
        BlockContent::create([
            'type' => 'basic',
            'info' => 'Block with iframe',
            'body' => [
                // Add iframe that should be non-interactive in Layout Builder preview.
'value' => '<iframe id="iframe-that-should-be-disabled" width="1" height="1" src="https://www.youtube.com/embed/gODZzSOelss" frameborder="0"></iframe>',
                'format' => 'full_html',
            ],
        ])->save();
    }
    
    /**
     * Tests that forms and links are disabled in the Layout Builder preview.
     */
    public function testFormsLinksDisabled() {
        // Resize window due to bug in Chromedriver when clicking on overlays over
        // iFrames.
        // @see https://bugs.chromium.org/p/chromedriver/issues/detail?id=2758
        $this->getSession()
            ->resizeWindow(1200, 1200);
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalLogin($this->drupalCreateUser([
            'configure any layout',
            'administer node display',
            'administer node fields',
            'search content',
            'access contextual links',
        ]));
        $field_ui_prefix = 'admin/structure/types/manage/bundle_with_section_field';
        $this->drupalPostForm("{$field_ui_prefix}/display", [
            'layout[enabled]' => TRUE,
        ], 'Save');
        $assert_session->linkExists('Manage layout');
        $this->clickLink('Manage layout');
        // Add a block with a form, another with a link, and one with an iframe.
        $this->addBlock('Search form', '#layout-builder .search-block-form');
        $this->addBlock('Block with link', '#link-that-should-be-disabled');
        $this->addBlock('Block with iframe', '#iframe-that-should-be-disabled');
        // Ensure the links and forms are disabled using the defaults before the
        // layout is saved.
        $this->assertLinksFormIframeNotInteractive();
        $page->pressButton('Save layout');
        $this->clickLink('Manage layout');
        // Ensure the links and forms are disabled using the defaults.
        $this->assertLinksFormIframeNotInteractive();
        // Ensure contextual links were not disabled.
        $this->assertContextualLinksClickable();
        $this->drupalPostForm("{$field_ui_prefix}/display/default", [
            'layout[allow_custom]' => TRUE,
        ], 'Save');
        $this->drupalGet('node/1/layout');
        // Ensure the links and forms are also disabled in using the override.
        $this->assertLinksFormIframeNotInteractive();
        // Ensure contextual links were not disabled.
        $this->assertContextualLinksClickable();
    }
    
    /**
     * Adds a block in the Layout Builder.
     *
     * @param string $block_link_text
     *   The link text to add the block.
     * @param string $rendered_locator
     *   The CSS locator to confirm the block was rendered.
     */
    protected function addBlock($block_link_text, $rendered_locator) {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        // Add a new block.
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', '#layout-builder a:contains(\'Add block\')'));
        $this->clickLink('Add block');
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', '#drupal-off-canvas'));
        $assert_session->assertWaitOnAjaxRequest();
        $assert_session->linkExists($block_link_text);
        $this->clickLink($block_link_text);
        // Wait for off-canvas dialog to reopen with block form.
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', ".layout-builder-add-block"));
        $assert_session->assertWaitOnAjaxRequest();
        $page->pressButton('Add block');
        // Wait for block form to be rendered in the Layout Builder.
        $this->assertNotEmpty($assert_session->waitForElement('css', $rendered_locator));
    }
    
    /**
     * Checks if element is unclickable.
     *
     * @param \Behat\Mink\Element\NodeElement $element
     *   Element being checked for.
     */
    protected function assertElementUnclickable(NodeElement $element) {
        try {
            $element->click();
            $tag_name = $element->getTagName();
            $this->fail(new FormattableMarkup("@tag_name was clickable when it shouldn't have been", [
                '@tag_name' => $tag_name,
            ]));
        } catch (\Exception $e) {
            $this->assertStringContainsString('is not clickable at point', $e->getMessage());
        }
    }
    
    /**
     * Asserts that forms, links, and iframes in preview are non-interactive.
     */
    protected function assertLinksFormIframeNotInteractive() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->assertNotEmpty($assert_session->waitForElement('css', '.block-search'));
        $searchButton = $assert_session->buttonExists('Search');
        $this->assertElementUnclickable($searchButton);
        $assert_session->linkExists('Take me away');
        $this->assertElementUnclickable($page->findLink('Take me away'));
        $iframe = $assert_session->elementExists('css', '#iframe-that-should-be-disabled');
        $this->assertElementUnclickable($iframe);
    }
    
    /**
     * Confirms that Layout Builder contextual links remain active.
     */
    protected function assertContextualLinksClickable() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $this->drupalGet($this->getUrl());
        $this->clickContextualLink('.block-field-blocknodebundle-with-section-fieldbody [data-contextual-id^="layout_builder_block"]', 'Configure');
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', '.ui-dialog-titlebar [title="Close"]'));
        $page->pressButton('Close');
        $assert_session->assertNoElementAfterWait('css', '#drupal-off-canvas');
        // Run the steps a second time after closing dialog, which reverses the
        // order that behaviors.layoutBuilderDisableInteractiveElements and
        // contextual link initialization occurs.
        $this->clickContextualLink('.block-field-blocknodebundle-with-section-fieldbody [data-contextual-id^="layout_builder_block"]', 'Configure');
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', '#drupal-off-canvas'));
        $page->pressButton('Close');
        $assert_session->assertNoElementAfterWait('css', '#drupal-off-canvas');
        $this->assertContextualLinkRetainsMouseup();
    }
    
    /**
     * Makes sure contextual links respond to mouseup event.
     *
     * Disabling interactive elements includes preventing defaults on the mouseup
     * event for links. However, this should not happen with contextual links.
     * This is confirmed by clicking a contextual link then moving the mouse
     * pointer. If mouseup is working properly, the draggable element will not
     * be moved by the pointer moving.
     */
    protected function assertContextualLinkRetainsMouseup() {
        $assert_session = $this->assertSession();
        $page = $this->getSession()
            ->getPage();
        $body_field_selector = '.block-field-blocknodebundle-with-section-fieldbody';
        $body_block = $page->find('css', $body_field_selector);
        $this->assertNotEmpty($body_block);
        // Get the current Y position of the body block.
        $body_block_top_position = $this->getElementVerticalPosition($body_field_selector, 'top');
        $body_block_contextual_link_button = $body_block->find('css', '.trigger');
        $this->assertNotEmpty($body_block_contextual_link_button);
        // If the body block contextual link is hidden, make it visible.
        if ($body_block_contextual_link_button->hasClass('visually-hidden')) {
            $this->toggleContextualTriggerVisibility($body_field_selector);
        }
        // For the purposes of this test, the contextual link must be accessed with
        // discrete steps instead of using ContextualLinkClickTrait.
        $body_block->pressButton('Open configuration options');
        $body_block->clickLink('Configure');
        $this->assertNotEmpty($assert_session->waitForElementVisible('css', '#drupal-off-canvas'));
        $assert_session->assertWaitOnAjaxRequest();
        // After the contextual link opens the dialog, move the mouse pointer
        // elsewhere on the page. If mouse up were not working correctly this would
        // actually drag the body field too.
        $this->movePointerTo('#iframe-that-should-be-disabled');
        $new_body_block_bottom_position = $this->getElementVerticalPosition($body_field_selector, 'bottom');
        $iframe_top_position = $this->getElementVerticalPosition('#iframe-that-should-be-disabled', 'top');
        $minimum_distance_mouse_moved = $iframe_top_position - $new_body_block_bottom_position;
        $this->assertGreaterThan(200, $minimum_distance_mouse_moved, 'The mouse moved at least 200 pixels');
        // If mouseup is working properly, the body block should be nearly in same
        // position as it was when $body_block_y_position was declared. It will have
        // moved slightly because the current block being configured will have a
        // border that was not present when the dialog was not open.
        $new_body_block_top_position = $this->getElementVerticalPosition($body_field_selector, 'top');
        $distance_body_block_moved = abs($body_block_top_position - $new_body_block_top_position);
        // Confirm that body moved only slightly compared to the distance the mouse
        // moved and therefore was not dragged when the mouse moved.
        $this->assertGreaterThan($distance_body_block_moved * 20, $minimum_distance_mouse_moved);
    }
    
    /**
     * Gets the element position.
     *
     * @param string $css_selector
     *   The CSS selector of the element.
     * @param string $position_type
     *   The position type to get, either 'top' or 'bottom'.
     *
     * @return int
     *   The element position.
     */
    protected function getElementVerticalPosition($css_selector, $position_type) {
        $this->assertContains($position_type, [
            'top',
            'bottom',
        ], 'Expected position type.');
        return (int) $this->getSession()
            ->evaluateScript("document.querySelector('{$css_selector}').getBoundingClientRect().{$position_type} + window.pageYOffset");
    }
    
    /**
     * Moves mouse pointer to location of $selector.
     *
     * @param string $selector
     *   CSS selector.
     */
    protected function movePointerTo($selector) {
        $driver_session = $this->getSession()
            ->getDriver()
            ->getWebDriverSession();
        $element = $driver_session->element('css selector', $selector);
        $driver_session->moveto([
            'element' => $element->getID(),
        ]);
    }

}