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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * The contents of this file are subject to the terms of either the Universal Permissive License
 * v 1.0 as shown at http://oss.oracle.com/licenses/upl
 *
 * or the following license:
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
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package org.openjdk.jmc.rjmx.ui.celleditors;

import static org.openjdk.jmc.common.unit.UnitLookup.MILLISECOND;

import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.openjdk.jmc.rjmx.services.IUpdateInterval;
import org.openjdk.jmc.rjmx.subscription.internal.UpdatePolicyToolkit;

class UpdateIntervalCellEditor extends UnitCellEditor {

	public UpdateIntervalCellEditor(Composite parent) {
		super(parent);
		getProposal().setEnabled(false);
		setUnit(MILLISECOND, Integer.class.getName());
	}

	@Override
	public Control getControl() {
		Object currentValue = super.doGetValue();
		if (currentValue == null || currentValue.equals(IUpdateInterval.DEFAULT)) {
			return null;
		}
		return super.getControl();
	}

	@Override
	public void activate() {
		Object currentValue = super.doGetValue();
		if (currentValue == null || currentValue.equals(IUpdateInterval.DEFAULT)) {
			doSetValue(IUpdateInterval.ONCE);
			fireApplyEditorValue();
		} else {
			if (currentValue.equals(IUpdateInterval.ONCE)) {
				doSetValue(UpdatePolicyToolkit.getDefaultUpdateInterval());
			}
			getProposal().setEnabled(true);
			super.activate();
		}
	}

	@Override
	public void deactivate() {
		/*
		 * Always keep content proposal disabled when the editor is inactive. This to avoid it
		 * popping up when clicking on a cell changes the value immediately without activating the
		 * editor.
		 */
		if (getProposal() != null) {
			getProposal().setEnabled(false);
		}
		super.deactivate();
	}

	@Override
	protected Object doGetValue() {
		return super.doGetValue() == null ? Integer.valueOf(IUpdateInterval.DEFAULT) : super.doGetValue();
	}

	@Override
	protected Object parse(String str) throws Exception {
		Integer val = (Integer) super.parse(str);
		if (val <= 0) {
			throw new Exception(Messages.UpdateIntervalCellEditor_INTERVAL_TOO_SMALL);
		}
		return val;
	}
}
