1   /*
    2    * Copyright (c) 2000 World Wide Web Consortium,
    3    * (Massachusetts Institute of Technology, Institut National de
    4    * Recherche en Informatique et en Automatique, Keio University). All
    5    * Rights Reserved. This program is distributed under the W3C's Software
    6    * Intellectual Property License. This program is distributed in the
    7    * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
    8    * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    9    * PURPOSE.
   10    * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
   11    */
   12   
   13   package org.w3c.dom.css;
   14   
   15   import org.w3c.dom.Element;
   16   import org.w3c.dom.stylesheets.DocumentStyle;
   17   
   18   /**
   19    * This interface represents a document with a CSS view.
   20    * <p> The <code>getOverrideStyle</code> method provides a mechanism through 
   21    * which a DOM author could effect immediate change to the style of an 
   22    * element without modifying the explicitly linked style sheets of a 
   23    * document or the inline style of elements in the style sheets. This style 
   24    * sheet comes after the author style sheet in the cascade algorithm and is 
   25    * called override style sheet. The override style sheet takes precedence 
   26    * over author style sheets. An "!important" declaration still takes 
   27    * precedence over a normal declaration. Override, author, and user style 
   28    * sheets all may contain "!important" declarations. User "!important" rules 
   29    * take precedence over both override and author "!important" rules, and 
   30    * override "!important" rules take precedence over author "!important" 
   31    * rules. 
   32    * <p> The expectation is that an instance of the <code>DocumentCSS</code> 
   33    * interface can be obtained by using binding-specific casting methods on an 
   34    * instance of the <code>Document</code> interface. 
   35    * <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>.
   36    * @since DOM Level 2
   37    */
   38   public interface DocumentCSS extends DocumentStyle {
   39       /**
   40        *  This method is used to retrieve the override style declaration for a 
   41        * specified element and a specified pseudo-element. 
   42        * @param elt  The element whose style is to be modified. This parameter 
   43        *   cannot be null. 
   44        * @param pseudoElt  The pseudo-element or <code>null</code> if none. 
   45        * @return  The override style declaration. 
   46        */
   47       public CSSStyleDeclaration getOverrideStyle(Element elt, 
   48                                                   String pseudoElt);
   49   
   50   }