// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.command;

import org.litesoft.GWT.client.view.*;
import org.litesoft.core.*;
import org.litesoft.commonfoundation.independence.*;
import org.litesoft.uispecification.*;

public class ShowScreenCommand extends CommandHandlerAdaptor {
    private final ViewDef mViewDef;
    private final UriFragmentIdParams mParams;
    private final UriFragmentIdParams.ScreenParamsFactory mParamsFactory;
    private final TransientScreenProperties mNewScreenProperties = new TransientScreenProperties();

    protected ShowScreenCommand( ViewDef pViewDef, UriFragmentIdParams pParams, String pError, UriFragmentIdParams.ScreenParamsFactory pParamsFactory ) {
        mViewDef = pViewDef;
        mParams = pParams;
        mParamsFactory = pParamsFactory;
        getNewScreenProperties().ERROR.set( pError );
    }

    public ShowScreenCommand( ViewDef pViewDef, UriFragmentIdParams pParams, String pError ) {
        this( pViewDef, pParams, pError, null );
    }

    public ShowScreenCommand( ViewDef pViewDef, UriFragmentIdParams pParams ) {
        this( pViewDef, pParams, null, null );
    }

    public ShowScreenCommand( ViewDef pViewDef, String pError ) {
        this( pViewDef, null, pError, null );
    }

    public ShowScreenCommand( ViewDef pViewDef ) {
        this( pViewDef, null, null, null );
    }

    public ShowScreenCommand( ViewDef pViewDef, UriFragmentIdParams.ScreenParamsFactory pParamsFactory ) {
        this( pViewDef, null, null, pParamsFactory );
    }

    public TransientScreenProperties getNewScreenProperties() {
        return mNewScreenProperties;
    }

    @Override
    public void execute() {
        UriFragmentIdParams zParams = mParams;
        if ( (zParams == null) && (mParamsFactory != null) ) {
            zParams = mParamsFactory.create( mViewDef );
        }
        Instance.of( ScreenViewShower.class ).showScreen( mViewDef, zParams, mNewScreenProperties );
    }
}