/*
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See W3C License http://www.w3.org/Consortium/Legal/ for more
 * details.
 */

package org.w3c.dom.html;

import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

/**
 *  An <code>HTMLDocument</code> is the root of the HTML hierarchy and holds 
 * the entire content. Besides providing access to the hierarchy, it also 
 * provides some convenience methods for accessing certain sets of 
 * information from the document.
 * <p> The following properties have been deprecated in favor of the 
 * corresponding ones for the <code>BODY</code> element: alinkColor background
 *  bgColor fgColor linkColor vlinkColor In DOM Level 2, the method 
 * <code>getElementById</code> is inherited from the <code>Document</code> 
 * interface where it was moved.
 */
public interface HTMLDocument extends Document {
    /**
     *  The title of a document as specified by the <code>TITLE</code> element 
     * in the head of the document. 
     */
    public String getTitle();
    public void setTitle(String title);

    /**
     *  Returns the URI of the page that linked to this page. The value is an 
     * empty string if the user navigated to the page directly (not through a 
     * link, but, for example, via a bookmark). 
     */
    public String getReferrer();

    /**
     *  The domain name of the server that served the document, or 
     * <code>null</code> if the server cannot be identified by a domain name. 
     */
    public String getDomain();

    /**
     *  The complete URI of the document. 
     */
    public String getURL();

    /**
     *  The element that contains the content for the document. In documents 
     * with <code>BODY</code> contents, returns the <code>BODY</code> 
     * element. In frameset documents, this returns the outermost
     * <code>FRAMESET</code> element. 
     */
    public HTMLElement getBody();
    public void setBody(HTMLElement body);

    /**
     *  A collection of all the <code>IMG</code> elements in a document. The 
     * behavior is limited to <code>IMG</code> elements for backwards 
     * compatibility. 
     */
    public HTMLCollection getImages();

    /**
     *  A collection of all the <code>OBJECT</code> elements that include 
     * applets and <code>APPLET</code> ( deprecated ) elements in a document. 
     */
    public HTMLCollection getApplets();

    /**
     *  A collection of all <code>AREA</code> elements and anchor (
     * <code>A</code> ) elements in a document with a value for the 
     * <code>href</code> attribute. 
     */
    public HTMLCollection getLinks();

    /**
     *  A collection of all the forms of a document. 
     */
    public HTMLCollection getForms();

    /**
     *  A collection of all the anchor (<code>A</code> ) elements in a document
     *  with a value for the <code>name</code> attribute. Note. For reasons 
     * of backwards compatibility, the returned set of anchors only contains 
     * those anchors created with the <code>name</code>  attribute, not those 
     * created with the <code>id</code> attribute. 
     */
    public HTMLCollection getAnchors();

    /**
     *  The cookies associated with this document. If there are none, the 
     * value is an empty string. Otherwise, the value is a string: a 
     * semicolon-delimited list of "name, value" pairs for all the cookies 
     * associated with the page. For example, 
     * <code>name=value;expires=date</code> . 
     */
    public String getCookie();
    public void setCookie(String cookie);

    /**
     *  Note. This method and the ones following  allow a user to add to or 
     * replace the structure model of a document using strings of unparsed 
     * HTML. At the time of  writing alternate methods for providing similar 
     * functionality for  both HTML and XML documents were being considered. 
     * The following methods may be deprecated at some point in the future in 
     * favor of a more general-purpose mechanism.
     * <br> Open a document stream for writing. If a document exists in the 
     * target, this method clears it.
     */
    public void open();

    /**
     *  Closes a document stream opened by <code>open()</code> and forces 
     * rendering.
     */
    public void close();

    /**
     *  Write a string of text to a document stream opened by
     * <code>open()</code> . The text is parsed into the document's structure 
     * model.
     * @param text  The string to be parsed into some structure in the 
     *   document structure model.
     */
    public void write(String text);

    /**
     *  Write a string of text followed by a newline character to a document 
     * stream opened by <code>open()</code> . The text is parsed into the 
     * document's structure model.
     * @param text  The string to be parsed into some structure in the 
     *   document structure model.
     */
    public void writeln(String text);

    /**
     *  Returns the (possibly empty) collection of elements whose
     * <code>name</code> value is given by <code>elementName</code> .
     * @param elementName  The <code>name</code> attribute value for an 
     *   element.
     * @return  The matching elements.
     */
    public NodeList getElementsByName(String elementName);

}