Source/WebCore/dom/DocumentOrShadowRoot.idl

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// https://dom.spec.whatwg.org/#documentorshadowroot
interface mixin DocumentOrShadowRoot {
    // Extensions from HTML (https://html.spec.whatwg.org/multipage/dom.html#documentorshadowroot)
    readonly attribute Element? activeElement;

    // FIXME: getSelection is currently defined only to be on Document in the Selection API spec
    // https://w3c.github.io/selection-api/#extensions-to-document-interface, but
    // previously had been defined to be on DocumentOrShadowRoot in the deprecated Shadow DOM spec
    // https://w3c.github.io/webcomponents/spec/shadow/#extensions-to-the-documentorshadowroot-mixin.
    // We should get this resolved in the Selection API spec and move this to the correct IDL files.
    // DOMSelection? getSelection();

    // FIXME: These are currently defined only to be on Document in the CSSOM spec
    // https://drafts.csswg.org/cssom-view/#extensions-to-the-document-interface, but
    // previously had been defined to be on DocumentOrShadowRoot in the deprecated Shadow DOM spec
    // https://w3c.github.io/webcomponents/spec/shadow/#extensions-to-the-documentorshadowroot-mixin.
    // We should get this resolved in the CSSOM spec and move these to the correct IDL files.
    Element? elementFromPoint(double x, double y);
    sequence<Element> elementsFromPoint(double x, double y);
    // CaretPosition? caretPositionFromPoint(double x, double y); // FIXME: Implement this.
};