package org.litesoft.GWT.client.widgets;

import org.litesoft.commonfoundation.base.*;

import com.google.gwt.dom.client.Style.*;
import com.google.gwt.user.client.ui.*;

public class Spacer extends Composite {
    private static final String BLANK_TEXT = " ";

    public Spacer( int pWidth, int pHeight ) {
        HTML widget = new HTML( BLANK_TEXT );
        widget.getElement().getStyle().setOverflow( Overflow.HIDDEN );
        initWidget( widget );
        //noinspection GWTStyleCheck
        setStyleName( "LayoutSpacer" );

        width( pWidth );
        height( pHeight );
    }

    public Spacer( int pWidthAndHeight ) {
        this( pWidthAndHeight, pWidthAndHeight );
    }

    public Spacer() {
        this( 1 );
    }

    /**
     * add a style "classname", and allow chaining calls.
     *
     * @param pStyle "classname"
     *
     * @return this
     */
    public Spacer style( String pStyle ) {
        if ( null != (pStyle = ConstrainTo.significantOrNull( pStyle )) ) {
            addStyleName( pStyle );
        }
        return this;
    }

    /**
     * Set the width, and allow chaining calls.
     */
    public Spacer width( String pWidth ) {
        if ( pWidth != null ) {
            setWidth( pWidth );
        }
        return this;
    }

    /**
     * Set the height, and allow chaining calls.
     */
    public Spacer height( String pHeight ) {
        if ( pHeight != null ) {
            setHeight( pHeight );
        }
        return this;
    }

    /**
     * Set the width & height, and allow chaining calls.
     */
    public Spacer size( String pSize ) {
        return width( pSize ).height( pSize );
    }

    /**
     * Set the width, and allow chaining calls.
     */
    public Spacer width( int pWidth ) {
        return width( convertSizePositive( pWidth ) );
    }

    /**
     * Set the height, and allow chaining calls.
     */
    public Spacer height( int pHeight ) {
        return height( convertSizePositive( pHeight ) );
    }

    /**
     * Set the width & height, and allow chaining calls.
     */
    public Spacer size( int pSize ) {
        return size( convertSizePositive( pSize ) );
    }

    private static String convertSizePositive( int pSize ) {
        return (pSize > 0) ? String.valueOf( pSize ) : null;
    }
}