AccessibleHypertext.java

/*
 * Copyright 1998-2000 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code 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 the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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package javax.accessibility;


import java.util.*;
import java.awt.*;
import javax.swing.text.*;


/**
 * <P>The AccessibleHypertext class is the base class for all
 * classes that present hypertext information on the display.  This class
 * provides the standard mechanism for an assistive technology to access
 * that text via its content, attributes, and spatial location.
 * It also provides standard mechanisms for manipulating hyperlinks.
 * Applications can determine if an object supports the AccessibleHypertext
 * interface by first obtaining its AccessibleContext (see {@link Accessible})
 * and then calling the {@link AccessibleContext#getAccessibleText}
 * method of AccessibleContext.  If the return value is a class which extends
 * AccessibleHypertext, then that object supports AccessibleHypertext.
 *
 * @see Accessible
 * @see Accessible#getAccessibleContext
 * @see AccessibleContext
 * @see AccessibleText
 * @see AccessibleContext#getAccessibleText
 *
 * @author      Peter Korn
 */
public interface AccessibleHypertext extends AccessibleText {

    /**
     * Returns the number of links within this hypertext document.
     *
     * @return number of links in this hypertext doc.
     */
    public abstract int getLinkCount();

    /**
     * Returns the nth Link of this Hypertext document.
     *
     * @param linkIndex within the links of this Hypertext
     * @return Link object encapsulating the nth link(s)
     */
    public abstract AccessibleHyperlink getLink(int linkIndex);

    /**
     * Returns the index into an array of hyperlinks that
     * is associated with this character index, or -1 if there
     * is no hyperlink associated with this index.
     *
     * @param charIndex index within the text
     * @return index into the set of hyperlinks for this hypertext doc.
     */
    public abstract int getLinkIndex(int charIndex);
}