htmloptionelementimpl.java

Java的面向对象数据库系统的源代码

/**
 * org/ozone-db/xml/dom/html/HTMLOptionElementImpl.java
 *
 * The contents of this file are subject to the OpenXML Public
 * License Version 1.0; you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 * http://www.openxml.org/license.html
 *
 * THIS SOFTWARE IS DISTRIBUTED ON AN "AS IS" BASIS WITHOUT WARRANTY
 * OF ANY KIND, EITHER EXPRESSED OR IMPLIED. THE INITIAL DEVELOPER
 * AND ALL CONTRIBUTORS SHALL NOT BE LIABLE FOR ANY DAMAGES AS A
 * RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. SEE THE LICENSE FOR THE SPECIFIC LANGUAGE GOVERNING
 * RIGHTS AND LIMITATIONS UNDER THE LICENSE.
 *
 * The Initial Developer of this code under the License is Assaf Arkin.
 * Portions created by Assaf Arkin are Copyright (C) 1998, 1999.
 * All Rights Reserved.
 */


package org.ozoneDB.xml.dom.html;


import org.ozoneDB.xml.dom.ElementImpl;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;
import org.w3c.dom.html.HTMLElement;
import org.w3c.dom.html.HTMLOptionElement;
import org.w3c.dom.html.HTMLSelectElement;


/**
 * @version $Revision: 1.2 $ $Date: 2003/11/20 23:18:42 $
 * @author <a href="mailto:[e-mail]">Assaf Arkin</a>
 * @see org.w3c.dom.html.HTMLOptionElement
 * @see ElementImpl
 */
public final class HTMLOptionElementImpl extends HTMLElementImpl implements HTMLOptionElement {


    public boolean getDefaultSelected() {
        // ! NOT FULLY IMPLEMENTED !
        return getAttribute( "default-selected" ) != null;
    }


    public void setDefaultSelected( boolean defaultSelected ) {
        // ! NOT FULLY IMPLEMENTED !
        setAttribute( "default-selected", defaultSelected ? "" : null );
    }


    public String getText() {
        Node child;
        String text;

        // Find the Text nodes contained within this element and return their
        // concatenated value. Required to go around comments, entities, etc.
        child = getFirstChild();
        text = "";
        while (child != null) {
            if (child instanceof Text) {
                text = text + ((Text)child).getData();
            }
            child = child.getNextSibling();
        }
        return text;
    }


    public void setText( String text ) {
        Node child;
        Node next;

        // Delete all the nodes and replace them with a single Text node.
        // This is the only approach that can handle comments and other nodes.
        child = getFirstChild();
        while (child != null) {
            next = child.getNextSibling();
            removeChild( child );
            child = next;
        }
        insertBefore( getOwnerDocument().createTextNode( text ), getFirstChild() );
    }


    public int getIndex() {
        Node parent;
        NodeList options;
        int i;

        // Locate the parent SELECT. Note that this OPTION might be inside a
        // OPTGROUP inside the SELECT. Or it might not have a parent SELECT.
        // Everything is possible. If no parent is found, return -1.
        parent = getParentNode();
        while (parent != null && !(parent instanceof HTMLSelectElement)) {
            parent = parent.getParentNode();
        }
        if (parent != null) {
            // Use getElementsByTagName() which creates a snapshot of all the
            // OPTION elements under the SELECT. Access to the returned NodeList
            // is very fast and the snapshot solves many synchronization problems.
            options = ((HTMLElement)parent).getElementsByTagName( "OPTION" );
            for (i = 0; i < options.getLength(); ++i) {
                if (options.item( i ) == this) {
                    return i;
                }
            }
        }
        return -1;
    }


    public void setIndex( int index ) {
        Node parent;
        NodeList options;
        Node item;

        // Locate the parent SELECT. Note that this OPTION might be inside a
        // OPTGROUP inside the SELECT. Or it might not have a parent SELECT.
        // Everything is possible. If no parent is found, just return.
        parent = getParentNode();
        while (parent != null && !(parent instanceof HTMLSelectElement)) {
            parent = parent.getParentNode();
        }
        if (parent != null) {
            // Use getElementsByTagName() which creates a snapshot of all the
            // OPTION elements under the SELECT. Access to the returned NodeList
            // is very fast and the snapshot solves many synchronization problems.
            // Make sure this OPTION is not replacing itself.
            options = ((HTMLElement)parent).getElementsByTagName( "OPTION" );
            if (options.item( index ) != this) {
                // Remove this OPTION from its parent. Place this OPTION right
                // before indexed OPTION underneath it's direct parent (might
                // be an OPTGROUP).
                getParentNode().removeChild( this );
                item = options.item( index );
                item.getParentNode().insertBefore( this, item );
            }
        }
    }


    public boolean getDisabled() {
        return getAttribute( "disabled" ) != null;
    }


    public void setDisabled( boolean disabled ) {
        setAttribute( "disabled", disabled ? "" : null );
    }


    public String getLabel() {
        return capitalize( getAttribute( "label" ) );
    }


    public void setLabel( String label ) {
        setAttribute( "label", label );
    }


    public boolean getSelected() {
        return getAttribute( "selected" ) != null;
    }


    public void setSelected( boolean selected ) {
        setAttribute( "selected", selected ? "" : null );
    }


    public String getValue() {
        return getAttribute( "value" );
    }


    public void setValue( String value ) {
        setAttribute( "value", value );
    }


    /**
     * Constructor requires owner document.
     *
     * @param owner The owner HTML document
     */
    public HTMLOptionElementImpl( HTMLDocumentImpl owner, String name ) {
        super( owner, "OPTION" );
    }


}