/*
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package javax.accessibility;
import java.util.*;
import java.awt.*;
import javax.swing.text.*;
/**
* Encapsulation of a link, or set of links (e.g. client side imagemap)
* in a Hypertext document
*
* @see Accessible
* @see Accessible#getAccessibleContext
* @see AccessibleContext
* @see AccessibleText
* @see AccessibleContext#getAccessibleText
*
* @version 1.20, 05/05/07
* @author Peter Korn
*/
public abstract class AccessibleHyperlink implements AccessibleAction {
/**
* Since the document a link is associated with may have
* changed, this method returns whether or not this Link is still valid
* (with respect to the document it references).
*
* @return a flag indicating whether this link is still valid with
* respect to the AccessibleHypertext it belongs to
*/
public abstract boolean isValid();
/**
* Returns the number of accessible actions available in this Link
* If there are more than one, the first one is NOT considered the
* "default" action of this LINK object (e.g. in an HTML imagemap).
* In general, links will have only one AccessibleAction in them.
*
* @return the zero-based number of Actions in this object
*/
public abstract int getAccessibleActionCount();
/**
* Performs the specified Action on the object
*
* @param i zero-based index of actions
* @return true if the action was performed; otherwise false.
* @see #getAccessibleActionCount
*/
public abstract boolean doAccessibleAction(int i);
/**
* Returns a String description of this particular
* link action. This should be a text string
* associated with anchoring text, this should be the
* anchor text. E.g. from HTML:
* <a HREF="http://www.sun.com/access">Accessibility</a>
* this method would return "Accessibility".
*
* Similarly, from this HTML:
* <a HREF="#top"><img src="top-hat.gif" alt="top hat"></a>
* this method would return "top hat"
*
* @param i zero-based index of the actions
* @return a String description of the action
* @see #getAccessibleActionCount
*/
public abstract String getAccessibleActionDescription(int i);
/**
* Returns an object that represents the link action,
* as appropriate for that link. E.g. from HTML:
* <a HREF="http://www.sun.com/access">Accessibility</a>
* this method would return a
* java.net.URL("http://www.sun.com/access.html");
*
* @param i zero-based index of the actions
* @return an Object representing the hypertext link itself
* @see #getAccessibleActionCount
*/
public abstract Object getAccessibleActionObject(int i);
/**
* Returns an object that represents the link anchor,
* as appropriate for that link. E.g. from HTML:
* <a href="http://www.sun.com/access">Accessibility</a>
* this method would return a String containing the text:
* "Accessibility".
*
* Similarly, from this HTML:
* <a HREF="#top"><img src="top-hat.gif" alt="top hat"></a>
* this might return the object ImageIcon("top-hat.gif", "top hat");
*
* @param i zero-based index of the actions
* @return an Object representing the hypertext anchor
* @see #getAccessibleActionCount
*/
public abstract Object getAccessibleActionAnchor(int i);
/**
* Gets the index with the hypertext document at which this
* link begins
*
* @return index of start of link
*/
public abstract int getStartIndex();
/**
* Gets the index with the hypertext document at which this
* link ends
*
* @return index of end of link
*/
public abstract int getEndIndex();
}
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