/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */
package com.sun.star.wizards.ui.event;

import com.sun.star.awt.*;
import com.sun.star.lang.EventObject;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.wizards.common.Helper;
import com.sun.star.wizards.common.PropertyNames;

/**
 * This class suppoprts imple cases where a UI control can
 * be directly synchronized with a data property.
 * Such controls are: the different text controls
 * (synchronizing the "Text" , "Value", "Date", "Time" property), 
 * Checkbox controls, Dropdown listbox controls (synchronizing the
 * SelectedItems[] property. 
 * For those controls, static convenience methods are offered, to simplify use.
 */
public class UnoDataAware extends DataAware
{

    protected Object unoControl;
    protected Object unoModel;
    protected String unoPropName;
    protected Object[] disableObjects = new Object[0];
    protected boolean inverse = false;

    protected UnoDataAware(Object dataObject, Value value, Object unoObject_, String unoPropName_)
    {
        super(dataObject, value);
        unoControl = unoObject_;
        unoModel = getModel(unoControl);
        unoPropName = unoPropName_;
    }

    public void setInverse(boolean i)
    {
        inverse = i;
    }

    protected void enableControls(Object value)
    {
        Boolean b = getBoolean(value);
        if (inverse)
        {
            b = b.booleanValue() ? Boolean.FALSE : Boolean.TRUE;
        }
        for (int i = 0; i < disableObjects.length; i++)
        {
            setEnabled(disableObjects[i], b);
        }
    }

    protected void setToUI(Object value)
    {
        Helper.setUnoPropertyValue(unoModel, unoPropName, value);
    }

    private String stringof(Object value)
    {
        if (value.getClass().isArray())
        {
            StringBuffer sb = new StringBuffer("[");
            for (int i = 0; i < ((short[]) value).length; i++)
            {
                sb.append(((short[]) value)[i]).append(" , ");
            }
            sb.append("]");
            return sb.toString();
        }
        else
        {
            return value.toString();
        }
    }

    /**
     * Try to get from an arbitrary object a boolean value.
     * Null returns Boolean.FALSE;
     * A Boolean object returns itself.
     * An Array returns true if it not empty.
     * An Empty String returns Boolean.FALSE.
     * everything else returns a Boolean.TRUE.
     * @param value
     * @return
     */
    protected Boolean getBoolean(Object value)
    {
        if (value == null)
        {
            return Boolean.FALSE;
        }
        if (value instanceof Boolean)
        {
            return (Boolean) value;
        }
        else if (value.getClass().isArray())
        {
            return ((short[]) value).length != 0 ? Boolean.TRUE : Boolean.FALSE;
        }
        else if (value.equals(PropertyNames.EMPTY_STRING))
        {
            return Boolean.FALSE;
        }
        else if (value instanceof Number)
        {
            return ((Number) value).intValue() == 0 ? Boolean.TRUE : Boolean.FALSE;
        }
        else
        {
            return Boolean.TRUE;
        }
    }

    public void disableControls(Object[] controls)
    {
        disableObjects = controls;
    }

    protected Object getFromUI()
    {
        return Helper.getUnoPropertyValue(unoModel, unoPropName);
    }

    private static UnoDataAware attachTextControl(Object data, String prop, Object unoText, final Listener listener, String unoProperty, boolean field, Object value)
    {
        XTextComponent text = UnoRuntime.queryInterface(XTextComponent.class, unoText);
        final UnoDataAware uda = new UnoDataAware(data,
                field
                ? DataAwareFields.getFieldValueFor(data, prop, value)
                : new DataAware.PropertyValue(prop, data),
                text, unoProperty);
        text.addTextListener(new XTextListener()
        {

            public void textChanged(TextEvent te)
            {
                uda.updateData();
                if (listener != null)
                {
                    listener.eventPerformed(te);
                }
            }

            public void disposing(EventObject eo)
            {
            }
        });
        return uda;
    }

    public static UnoDataAware attachEditControl(Object data, String prop, Object unoControl, Listener listener, boolean field)
    {
        return attachTextControl(data, prop, unoControl, listener, "Text", field, PropertyNames.EMPTY_STRING);
    }

    public static UnoDataAware attachDateControl(Object data, String prop, Object unoControl, Listener listener, boolean field)
    {
        return attachTextControl(data, prop, unoControl, listener, "Date", field, 0);
    }

    public static UnoDataAware attachTimeControl(Object data, String prop, Object unoControl, Listener listener, boolean field)
    {
        return attachTextControl(data, prop, unoControl, listener, "Time", field, 0);
    }

    public static UnoDataAware attachNumericControl(Object data, String prop, Object unoControl, Listener listener, boolean field)
    {
        return attachTextControl(data, prop, unoControl, listener, "Value", field, new Double(0));
    }

    public static UnoDataAware attachCheckBox(Object data, String prop, Object checkBox, final Listener listener, boolean field)
    {
        XCheckBox xcheckBox = UnoRuntime.queryInterface(XCheckBox.class, checkBox);
        final UnoDataAware uda = new UnoDataAware(data,
                field
                ? DataAwareFields.getFieldValueFor(data, prop, new Short((short) 0))
                : new DataAware.PropertyValue(prop, data),
                checkBox, PropertyNames.PROPERTY_STATE);
        xcheckBox.addItemListener(itemListener(uda, listener));
        return uda;
    }

    static XItemListener itemListener(final DataAware da, final Listener listener)
    {
        return new XItemListener()
        {

            public void itemStateChanged(ItemEvent ie)
            {
                da.updateData();
                if (listener != null)
                {
                    listener.eventPerformed(ie);
                }
            }

            public void disposing(EventObject eo)
            {
            }
        };
    }

    public static UnoDataAware attachLabel(Object data, String prop, Object label, final Listener listener, boolean field)
    {
        return new UnoDataAware(data,
                field ? DataAwareFields.getFieldValueFor(data, prop, PropertyNames.EMPTY_STRING)
                : new DataAware.PropertyValue(prop, data),
                label, PropertyNames.PROPERTY_LABEL);
    }

    public static UnoDataAware attachListBox(Object data, String prop, Object listBox, final Listener listener, boolean field)
    {
        XListBox xListBox = UnoRuntime.queryInterface(XListBox.class, listBox);
        final UnoDataAware uda = new UnoDataAware(data,
                field
                ? DataAwareFields.getFieldValueFor(data, prop, new short[0])
                : new DataAware.PropertyValue(prop, data),
                listBox, PropertyNames.SELECTED_ITEMS);
        xListBox.addItemListener(itemListener(uda, listener));
        return uda;
    }

    public static Object getModel(Object control)
    {
        return UnoRuntime.queryInterface(XControl.class, control).getModel();
    }

    public static void setEnabled(Object control, boolean enabled)
    {
        setEnabled(control, enabled ? Boolean.TRUE : Boolean.FALSE);
    }

    public static void setEnabled(Object control, Boolean enabled)
    {
        Helper.setUnoPropertyValue(getModel(control), PropertyNames.PROPERTY_ENABLED, enabled);
    }
}
