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/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. and others.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.css2.layout;
import java.util.ArrayList;
import java.util.List;
/**
* A FlowBox that can contain other BlockInfos. The contained BlockInfos are
* called <i>fragments </i>.
*
* @author mengbo
* @since 2.1
*/
public abstract class CompositeBox extends FlowBox {
/**
* The contained fragments.
*/
protected List _fragments = new ArrayList();
int _recommendedWidth;
int _recommendedHeight;
/**
* Adds the specified FlowBox. Updates the width, height, and ascent
* properties.
*
* @param block
* the FlowBox being added
*/
public void add(FlowBox block) {
// The order is critical.see the first "if" block in the unionInfo()
// method.
unionInfo(block);
_fragments.add(block);
}
/**
* Removes all owned fragments and invalidates this CompositeBox.
*/
public void clear() {
_fragments.clear();
resetInfo();
}
/**
* Overridden to ensure that the CompositeBox is valid.
*
* @see FlowBox#getBounds()
*/
// public Rectangle getBounds() {
// validate();
// return this;
// }
/**
* @return the List of fragments
*/
public List getFragments() {
return _fragments;
}
/**
* Returns the recommended width for this CompositeBox.
*
* @return the recommended width
*/
public int getRecommendedWidth() {
return _recommendedWidth;
}
/**
* resets fields before unioning the data from the fragments.
*/
protected void resetInfo() {
_width = _height = 0;
}
/**
* Sets the recommended width for this CompositeBox.
*
* @param w
* the width
*/
public void setRecommendedWidth(int w) {
_recommendedWidth = w;
}
/**
* @param h
*/
public void setRecommendedHeight(int h) {
_recommendedHeight = h;
}
/**
* unions the fragment's width, height, and ascent into this composite.
*
* @param box
* the fragment
*/
protected void unionInfo(FlowBox box) {
int right = Math.max(_x + _width, box._x + box._width);
int bottom = Math.max(_y + _height, box._y + box._height);
_x = Math.min(_x, box._x);
_y = Math.min(_y, box._y);
_width = right - _x;
_height = bottom - _y;
}
/**
* @return the content width
*/
public int getContentWidth() {
return getWidth() - getBorderPaddingWidth();
}
/**
* @return the content height
*/
public int getContentHeight() {
return getHeight() - getBorderPaddingHeight();
}
/**
* @return the recommended content width
*/
public int getRecommendedContentWidth() {
return Math.max(0, getRecommendedWidth() - getBorderPaddingWidth());
}
//
// public int getRecommendedContentHeight()
// {
// return Math.max(0, getRecommendedHeight() - getBorderPaddingHeight());
// }
}
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