/*==========================================================================*\
| $Id: WCTreeHeadings.java,v 1.1 2011/05/13 19:43:46 aallowat Exp $
|*-------------------------------------------------------------------------*|
| Copyright (C) 2009 Virginia Tech
|
| This file is part of Web-CAT.
|
| Web-CAT is free software; you can redistribute it and/or modify
| it under the terms of the GNU Affero General Public License as published
| by the Free Software Foundation; either version 3 of the License, or
| (at your option) any later version.
|
| Web-CAT 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 for more details.
|
| You should have received a copy of the GNU Affero General Public License
| along with Web-CAT; if not, see <http://www.gnu.org/licenses/>.
\*==========================================================================*/
package org.webcat.ui;
import org.webcat.ui._base.WCTableSubcomponent;
import org.webcat.ui._base.WCTreeSubcomponent;
import org.webcat.ui.generators.JavascriptGenerator;
import com.webobjects.appserver.WOActionResults;
import com.webobjects.appserver.WOComponent;
import com.webobjects.appserver.WOContext;
import com.webobjects.appserver.WOElement;
import com.webobjects.appserver.WOResponse;
import com.webobjects.appserver._private.WOComponentReference;
import com.webobjects.appserver._private.WODynamicGroup;
import com.webobjects.appserver._private.WOHTMLBareString;
import com.webobjects.foundation.NSArray;
import com.webobjects.foundation.NSMutableArray;
import er.extensions.appserver.ERXWOContext;
//-------------------------------------------------------------------------
/**
* A component that contains {@link WCTableHeading} instances. This component
* also provides the paging controls for the table.
*
* @author Tony Allevato
* @author Last changed by $Author: aallowat $
* @version $Revision: 1.1 $, $Date: 2011/05/13 19:43:46 $
*/
public class WCTreeHeadings extends WCTreeSubcomponent
{
//~ Constructors ..........................................................
// ----------------------------------------------------------
public WCTreeHeadings(WOContext context)
{
super(context);
}
//~ Methods ...............................................................
// ----------------------------------------------------------
@Override
public void appendToResponse(WOResponse response, WOContext context)
{
if (tree() == null)
{
throw new IllegalStateException("WCTreeHeadings must be an "
+ "immediate child of WCTree.");
}
cachedNumberOfColumns = null;
super.appendToResponse(response, context);
}
// ----------------------------------------------------------
/**
* Returns the number of columns in the table, computed by counting the
* number of {@link WCTableHeading} elements contained as immediate children
* of this element. This is used to determine the "colspan" attribute of
* the header cell that contains the toolbar controls.
*
* @return the number of columns in the table
*/
public Integer numberOfColumns()
{
if (cachedNumberOfColumns == null)
{
// This is a big hack. We ask the children of WCTableHeadings to
// append themselves to a temporary response, and then we count the
// number of occurrences of "<th" that are in it.
int count = 0;
WOElement childTemplate = _childTemplate();
WOComponent component = context().component();
ERXWOContext.contextDictionary().setObjectForKey(true,
WCTreeHeading.COUNTING_HEADINGS_KEY);
context()._setCurrentComponent(component.parent());
WOResponse fakeResponse = new WOResponse();
childTemplate.appendToResponse(fakeResponse, context());
String headings = fakeResponse.contentString().toLowerCase();
context()._setCurrentComponent(component);
ERXWOContext.contextDictionary().removeObjectForKey(
WCTreeHeading.COUNTING_HEADINGS_KEY);
int index = -1;
while ((index = headings.indexOf("<th", index + 1)) != -1)
{
count++;
}
if (tree().canSelectItems)
{
count++;
}
cachedNumberOfColumns = count;
tree().numberOfColumns = count;
}
return cachedNumberOfColumns;
}
//~ Static/instance variables .............................................
private Integer cachedNumberOfColumns;
}