001/*
002 * Copyright (c) 2000 World Wide Web Consortium,
003 * (Massachusetts Institute of Technology, Institut National de
004 * Recherche en Informatique et en Automatique, Keio University). All
005 * Rights Reserved. This program is distributed under the W3C's Software
006 * Intellectual Property License. This program is distributed in the
007 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
008 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
009 * PURPOSE.
010 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
011 */
012
013package org.w3c.dom.css;
014
015import org.w3c.dom.Element;
016import org.w3c.dom.stylesheets.DocumentStyle;
017
018/**
019 * This interface represents a document with a CSS view.
020 * <p> The <code>getOverrideStyle</code> method provides a mechanism through
021 * which a DOM author could effect immediate change to the style of an
022 * element without modifying the explicitly linked style sheets of a
023 * document or the inline style of elements in the style sheets. This style
024 * sheet comes after the author style sheet in the cascade algorithm and is
025 * called override style sheet. The override style sheet takes precedence
026 * over author style sheets. An "!important" declaration still takes
027 * precedence over a normal declaration. Override, author, and user style
028 * sheets all may contain "!important" declarations. User "!important" rules
029 * take precedence over both override and author "!important" rules, and
030 * override "!important" rules take precedence over author "!important"
031 * rules.
032 * <p> The expectation is that an instance of the <code>DocumentCSS</code>
033 * interface can be obtained by using binding-specific casting methods on an
034 * instance of the <code>Document</code> interface.
035 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Style-20001113'>Document Object Model (DOM) Level 2 Style Specification</a>.
036 * @since DOM Level 2
037 */
038public interface DocumentCSS extends DocumentStyle {
039    /**
040     *  This method is used to retrieve the override style declaration for a
041     * specified element and a specified pseudo-element.
042     * @param elt  The element whose style is to be modified. This parameter
043     *   cannot be null.
044     * @param pseudoElt  The pseudo-element or <code>null</code> if none.
045     * @return  The override style declaration.
046     */
047    public CSSStyleDeclaration getOverrideStyle(Element elt,
048                                                String pseudoElt);
049
050}