/*******************************************************************************
 * Copyright (c) 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *     
 * Port to the D Programming language:
 *     Jacob Carlborg <jacob.carlborg@gmail.com>
 *******************************************************************************/
module dwt.custom.CLayoutData;

import dwt.DWT;
import dwt.graphics.Point;
import dwt.widgets.Control;

class CLayoutData {

    int defaultWidth = -1, defaultHeight = -1;
    int currentWhint, currentHhint, currentWidth = -1, currentHeight = -1;

    Point computeSize (Control control, int wHint, int hHint, bool flushCache) {
        if (flushCache)
            flushCache();
        if (wHint is DWT.DEFAULT && hHint is DWT.DEFAULT) {
            if (defaultWidth is -1 || defaultHeight is -1) {
                Point size = control.computeSize(wHint, hHint, flushCache);
                defaultWidth = size.x;
                defaultHeight = size.y;
            }
            return new Point(defaultWidth, defaultHeight);
        }
        if (currentWidth is -1 || currentHeight is -1 || wHint !is currentWhint || hHint !is currentHhint) {
            Point size = control.computeSize(wHint, hHint, flushCache);
            currentWhint = wHint;
            currentHhint = hHint;
            currentWidth = size.x;
            currentHeight = size.y;
        }
        return new Point(currentWidth, currentHeight);
    }

    void flushCache () {
        defaultWidth = defaultHeight = -1;
        currentWidth = currentHeight = -1;
    }
}