/*
 * Created on 04.03.2005
 * by Richard Birenheide (D035816)
 *
 * Copyright SAP AG 2005
 */
package org.eclipse.swt.custom;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;

/**
 * TODO add type comment
 * <p/>
 * @author Richard Birenheide (D035816)
 */
public class SapTableEditor extends TableEditor {
	private final Table table;
	private final boolean[] placeEditorOnImage;
	public SapTableEditor(final Table table, final boolean[] placeEditorOnImage) {
		super(table);
		this.table = table;
		if (placeEditorOnImage == null) {
			this.placeEditorOnImage = null;
		}
		else {
			this.placeEditorOnImage = (boolean[]) placeEditorOnImage.clone();
		}
	}
	public SapTableEditor(Table table) {
		this(table, null);
	}
	Rectangle computeBounds () {
		if (this.placeEditorOnImage == null) {
			return super.computeBounds();
		}
		TableItem item = super.getItem();
		int column = super.getColumn();
		if (item == null || column == -1 || item.isDisposed()) return new Rectangle(0, 0, 0, 0);
		Rectangle cell = item.getBounds(column);
		Rectangle rect = item.getImageBounds(column);
		if (this.placeEditorOnImage()) {
			cell.x = rect.x;
		}
		else {
			cell.x = rect.x + rect.width;
			cell.width -= rect.width;
		}

		
		Rectangle area = table.getClientArea();
		if (cell.x < area.x + area.width) {
			if (cell.x + cell.width > area.x + area.width) {
				cell.width = area.x + area.width - cell.x;
			}
		}
		Rectangle editorRect = new Rectangle(cell.x, cell.y, minimumWidth, minimumHeight);

		if (grabHorizontal) {
			editorRect.width = Math.max(cell.width, minimumWidth);
		}
		
		if (grabVertical) {
			editorRect.height = Math.max(cell.height, minimumHeight);
		}
		
		if (horizontalAlignment == SWT.RIGHT) {
			editorRect.x += cell.width - editorRect.width;
		} else if (horizontalAlignment == SWT.LEFT) {
			// do nothing - cell.x is the right answer
		} else { // default is CENTER
			editorRect.x += (cell.width - editorRect.width)/2;
		}
		
		if (verticalAlignment == SWT.BOTTOM) {
			editorRect.y += cell.height - editorRect.height;
		} else if (verticalAlignment == SWT.TOP) {
			// do nothing - cell.y is the right answer
		} else { // default is CENTER
			editorRect.y += (cell.height - editorRect.height)/2;
		}
		return editorRect;
	}
	private boolean placeEditorOnImage() {
		if (this.placeEditorOnImage == null) {
			return false;
		}
		int column = this.getColumn();
		if (column < 0 || column >= this.placeEditorOnImage.length) {
			return false;
		}
		return this.placeEditorOnImage[column];
	}
}