htmlselectelementimpl.java

Java的面向对象数据库系统的源代码

/**
 * org/ozone-db/xml/dom/html/HTMLSelectElementImpl.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.html.HTMLCollection;
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.HTMLSelectElement
 * @see ElementImpl
 */
public final class HTMLSelectElementImpl extends HTMLElementImpl implements HTMLSelectElement, HTMLFormControl {


    public String getType() {
        return getAttribute( "type" );
    }


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


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


    public int getSelectedIndex() {
        NodeList options;
        int i;

        // Use getElementsByTagName() which creates a snapshot of all the
        // OPTION elements under this SELECT. Access to the returned NodeList
        // is very fast and the snapshot solves many synchronization problems.
        // Locate the first selected OPTION and return its index. Note that
        // the OPTION might be under an OPTGROUP.
        options = getElementsByTagName( "OPTION" );
        for (i = 0; i < options.getLength(); ++i) {
            if (((HTMLOptionElement)options.item( i )).getSelected()) {
                return i;
            }
        }
        return -1;
    }


    public void setSelectedIndex( int selectedIndex ) {
        NodeList options;
        int i;

        // Use getElementsByTagName() which creates a snapshot of all the
        // OPTION elements under this SELECT. Access to the returned NodeList
        // is very fast and the snapshot solves many synchronization problems.
        // Change the select so all OPTIONs are off, except for the
        // selectIndex-th one.
        options = getElementsByTagName( "OPTION" );
        for (i = 0; i < options.getLength(); ++i) {
            ((HTMLOptionElementImpl)options.item( i )).setSelected( i == selectedIndex );
        }
    }


    public HTMLCollection getOptions() {
        if (_options == null) {
            _options = new HTMLCollectionImpl( this, HTMLCollectionImpl.OPTION );
        }
        return _options;
    }


    public int getLength() {
        return getOptions().getLength();
    }


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


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


    public boolean getMultiple() {
        return getAttribute( "multiple" ) != null;
    }


    public void setMultiple( boolean multiple ) {
        setAttribute( "multiple", multiple ? "" : null );
    }


    public String getName() {
        return getAttribute( "name" );
    }


    public void setName( String name ) {
        setAttribute( "name", name );
    }


    public int getSize() {
        return toInteger( getAttribute( "size" ) );
    }


    public void setSize( int size ) {
        setAttribute( "size", String.valueOf( size ) );
    }


    public int getTabIndex() {
        return toInteger( getAttribute( "tabindex" ) );
    }


    public void setTabIndex( int tabIndex ) {
        setAttribute( "tabindex", String.valueOf( tabIndex ) );
    }


    public void add( HTMLElement element, HTMLElement before ) {
        insertBefore( element, before );
    }


    public void remove( int index ) {
        NodeList options;
        Node removed;

        // Use getElementsByTagName() which creates a snapshot of all the
        // OPTION elements under this SELECT. Access to the returned NodeList
        // is very fast and the snapshot solves many synchronization problems.
        // Remove the indexed OPTION from it's parent, this might be this
        // SELECT or an OPTGROUP.
        options = getElementsByTagName( "OPTION" );
        removed = options.item( index );
        if (removed != null) {
            removed.getParentNode().removeChild( removed );
        }
    }


    public void blur() {
    // No scripting in server-side DOM. This method is moot.
    }


    public void focus() {
    // No scripting in server-side DOM. This method is moot.
    }


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

    private HTMLCollection _options;


}