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/*
* Enhydra Java Application Server Project
*
* The contents of this file are subject to the Enhydra Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License on
* the Enhydra web site ( http://www.enhydra.org/ ).
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific terms governing rights and limitations
* under the License.
*
* The Initial Developer of the Enhydra Application Server is Lutris
* Technologies, Inc. The Enhydra Application Server and portions created
* by Lutris Technologies, Inc. are Copyright Lutris Technologies, Inc.
* All Rights Reserved.
*
* Contributor(s):
*
* $Id: LazyHTMLElement.java,v 1.2 2005/01/26 08:29:24 jkjome Exp $
*/
package org.enhydra.xml.lazydom.html;
import org.enhydra.xml.lazydom.LazyElement;
import org.enhydra.xml.lazydom.LazyElementNoNS;
import org.w3c.dom.Attr;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.html.HTMLElement;
import org.w3c.dom.html.HTMLFormElement;
/*
* LazyDOM: This is a modified version of org.apache.html.dom.HTMLDocumentImpl
* modified to implement the LazyDOM. While most of the HTMLElement classes
* are created automatically using a sed script, this was a bit complex for
* this class, so it was done by hand. A diff with the Xerces class should
* make an upgrade of this class easy.
*/
/**
* Implements an HTML-specific element, an {@link org.w3c.dom.Element} that
* will only appear inside HTML documents. This element extends {@link
* org.enhydra.apache.xerces.dom.ElementImpl} by adding methods for directly
* manipulating HTML-specific attributes. All HTML elements gain access to
* the id, title, lang,
* dir and class attributes. Other elements
* add their own specific attributes.
*
*
* @version $Revision: 1.2 $ $Date: 2005/01/26 08:29:24 $
* @author Assaf Arkin
* @see org.w3c.dom.html.HTMLElement
*/
public class LazyHTMLElement
extends LazyElementNoNS
implements HTMLElement
{
/**
* Constructor required owner document and element tag name. Will be called
* by the constructor of specific element types but with a known tag name.
* Assures that the owner document is an HTML element.
*
* @param owner The owner HTML document
* @param template If not null, then this template will be used to
* initialize the Element.
* @param tagName The element's tag name
*/
LazyHTMLElement( LazyHTMLDocument owner, LazyElement template, String tagName )
{
// LazyDOM: removed tagName.toUpperCase(); always uppper case here.
super( owner, template, tagName );
}
public String getId()
{
return getAttribute( "id" );
}
public void setId( String id )
{
setAttribute( "id", id );
}
public String getTitle()
{
return getAttribute( "title" );
}
public void setTitle( String title )
{
setAttribute( "title", title );
}
public String getLang()
{
return getAttribute( "lang" );
}
public void setLang( String lang )
{
setAttribute( "lang", lang );
}
public String getDir()
{
return getAttribute( "dir" );
}
public void setDir( String dir )
{
setAttribute( "dir", dir );
}
public String getClassName()
{
return getAttribute( "class" );
}
public void setClassName( String className )
{
setAttribute( "class", className );
}
/**
* Convenience method used to translate an attribute value into an integer
* value. Returns the integer value or zero if the attribute is not a
* valid numeric string.
*
* @param value The value of the attribute
* @return The integer value, or zero if not a valid numeric string
*/
int getInteger( String value )
{
try
{
return Integer.parseInt( value );
}
catch ( NumberFormatException except )
{
return 0;
}
}
/**
* Convenience method used to translate an attribute value into a boolean
* value. If the attribute has an associated value (even an empty string),
* it is set and true is returned. If the attribute does not exist, false
* is returend.
*
* @param value The value of the attribute
* @return True or false depending on whether the attribute has been set
*/
boolean getBinary( String name )
{
return ( getAttributeNode( name ) != null );
}
/**
* Convenience method used to set a boolean attribute. If the value is true,
* the attribute is set to an empty string. If the value is false, the attribute
* is removed. HTML 4.0 understands empty strings as set attributes.
*
* @param name The name of the attribute
* @param value The value of the attribute
*/
void setAttribute( String name, boolean value )
{
if ( value )
setAttribute( name, name );
else
removeAttribute( name );
}
public Attr getAttributeNode( String attrName )
{
return super.getAttributeNode( attrName.toLowerCase() );
}
public Attr getAttributeNodeNS( String namespaceURI,
String localName )
{
if ( namespaceURI != null && namespaceURI.length() > 0 )
return super.getAttributeNodeNS( namespaceURI, localName );
else
return super.getAttributeNode( localName.toLowerCase() );
}
public String getAttribute( String attrName )
{
return super.getAttribute( attrName.toLowerCase() );
}
public String getAttributeNS( String namespaceURI,
String localName )
{
if ( namespaceURI != null && namespaceURI.length() > 0 )
return super.getAttributeNS( namespaceURI, localName );
else
return super.getAttribute( localName.toLowerCase() );
}
public final NodeList getElementsByTagName( String tagName )
{
return super.getElementsByTagName( tagName.toUpperCase() );
}
public final NodeList getElementsByTagNameNS( String namespaceURI,
String localName )
{
if ( namespaceURI != null && namespaceURI.length() > 0 )
return super.getElementsByTagNameNS( namespaceURI, localName.toUpperCase() );
else
return super.getElementsByTagName( localName.toUpperCase() );
}
/**
* Convenience method used to capitalize a one-off attribute value before it
* is returned. For example, the align values "LEFT" and "left" will both
* return as "Left".
*
* @param value The value of the attribute
* @return The capitalized value
*/
String capitalize( String value )
{
char[] chars;
int i;
// Convert string to charactares. Convert the first one to upper case,
// the other characters to lower case, and return the converted string.
chars = value.toCharArray();
if ( chars.length > 0 )
{
chars[ 0 ] = Character.toUpperCase( chars[ 0 ] );
for ( i = 1 ; i < chars.length ; ++i )
chars[ i ] = Character.toLowerCase( chars[ i ] );
return String.valueOf( chars );
}
return value;
}
/**
* Convenience method used to capitalize a one-off attribute value before it
* is returned. For example, the align values "LEFT" and "left" will both
* return as "Left".
*
* @param name The name of the attribute
* @return The capitalized value
*/
String getCapitalized( String name )
{
String value;
char[] chars;
int i;
value = getAttribute( name );
if ( value != null )
{
// Convert string to charactares. Convert the first one to upper case,
// the other characters to lower case, and return the converted string.
chars = value.toCharArray();
if ( chars.length > 0 )
{
chars[ 0 ] = Character.toUpperCase( chars[ 0 ] );
for ( i = 1 ; i < chars.length ; ++i )
chars[ i ] = Character.toLowerCase( chars[ i ] );
return String.valueOf( chars );
}
}
return value;
}
/**
* Convenience method returns the form in which this form element is contained.
* This method is exposed for form elements through the DOM API, but other
* elements have no access to it through the API.
*/
public HTMLFormElement getForm()
{
Node parent;
parent = getParentNode();
while ( parent != null )
{
if ( parent instanceof HTMLFormElement )
return (HTMLFormElement) parent;
parent = parent.getParentNode();
}
return null;
}
}
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