ChangeLog

2020-10-07  Andres Gonzalez  <andresg_22@apple.com>

        Presidential Executive Order pages not accessible with Safari.

        https://bugs.webkit.org/show_bug.cgi?id=217415

        <rdar://problem/69922416>

        Reviewed by NOBODY (OOPS!).

        Test: accessibility/aria-modal.html.

        Follow up to the previous change for this bug per Simon Fraser's comment.

        Check not only the visibility and opacity of the object in question but

        also of its ancestors.

        * accessibility/AXObjectCache.cpp:

        (WebCore::AXObjectCache::isNodeVisible const):

2020-10-07  Wenson Hsieh  <wenson_hsieh@apple.com>

        [GPU Process] Support CanvasRenderingContext2D.drawImage() with HTMLVideoElement

Source/WebCore/accessibility/AXObjectCache.cpp

@@bool AXObjectCache::isNodeVisible(Node* node) const

    if (!renderer)

        return false;

    const RenderStyle& style = renderer->style();

    if (style.display() == DisplayType::None

        || style.visibility() != Visibility::Visible

        || !style.opacity())

303 if (renderer->style().display() == DisplayType::None)

307304 return false;

308305

    // Check whether this object or any of its ancestors is not visible or has no opacity.

    for (auto* renderObject = renderer; renderObject; renderObject = renderObject->parent()) {

        const auto& style = renderObject->style();

        if (style.visibility() != Visibility::Visible || !style.opacity())

            return false;

    }

    // We also need to consider aria hidden status.

    if (!isNodeAriaVisible(node))

        return false;