Package org.drools.workbench.screens.guided.rule.client.editor

Source Code of org.drools.workbench.screens.guided.rule.client.editor.RuleAttributeWidget

/*
* Copyright 2012 JBoss Inc
*
* Licensed 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
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package org.drools.workbench.screens.guided.rule.client.editor;

import com.github.gwtbootstrap.client.ui.CheckBox;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyUpEvent;
import com.google.gwt.event.dom.client.KeyUpHandler;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
import org.drools.workbench.models.commons.shared.rule.RuleAttribute;
import org.drools.workbench.models.commons.shared.rule.RuleMetadata;
import org.drools.workbench.models.commons.shared.rule.RuleModel;
import org.drools.workbench.screens.guided.rule.client.resources.i18n.Constants;
import org.kie.workbench.common.widgets.client.resources.ItemImages;
import org.uberfire.client.common.DirtyableHorizontalPane;
import org.uberfire.client.common.FormStyleLayout;
import org.uberfire.client.common.InfoPopup;
import org.uberfire.client.common.SmallLabel;

/**
* Displays a list of rule options (attributes).
* <p/>
* Added support for metadata - Michael Rhoden 10/17/08
*/
public class RuleAttributeWidget extends Composite {

    /**
     * These are the names of all of the rule attributes for this widget
     */
    public static final String SALIENCE_ATTR = "salience";         // needs to be public
    public static final String ENABLED_ATTR = "enabled";
    public static final String DATE_EFFECTIVE_ATTR = "date-effective";
    public static final String DATE_EXPIRES_ATTR = "date-expires";
    public static final String NO_LOOP_ATTR = "no-loop";
    public static final String AGENDA_GROUP_ATTR = "agenda-group";
    public static final String ACTIVATION_GROUP_ATTR = "activation-group";
    public static final String DURATION_ATTR = "duration";
    public static final String TIMER_ATTR = "timer";
    public static final String CALENDARS_ATTR = "calendars";
    public static final String AUTO_FOCUS_ATTR = "auto-focus";
    public static final String LOCK_ON_ACTIVE_ATTR = "lock-on-active";
    public static final String RULEFLOW_GROUP_ATTR = "ruleflow-group";
    public static final String DIALECT_ATTR = "dialect";
    public static final String LOCK_LHS = "freeze_conditions";
    public static final String LOCK_RHS = "freeze_actions";

    public static final String DEFAULT_DIALECT = "mvel";

    /**
     * If the rule attribute is represented visually by a checkbox, these are
     * the values that will be stored in the model when checked/unchecked
     */
    private static final String TRUE_VALUE = "true";
    private static final String FALSE_VALUE = "false";

    private RuleModel model;
    private RuleModeller parent;

    public RuleAttributeWidget( final RuleModeller parent,
                                final RuleModel model,
                                final boolean isReadOnly ) {
        this.parent = parent;
        this.model = model;
        FormStyleLayout layout = new FormStyleLayout();
        //Adding metadata here, seems redundant to add a new widget for metadata. Model does handle meta data separate.
        RuleMetadata[] meta = model.metadataList;
        if ( meta.length > 0 ) {
            HorizontalPanel hp = new HorizontalPanel();
            hp.add( new SmallLabel( Constants.INSTANCE.Metadata2() ) );
            layout.addRow( hp );
        }
        for ( int i = 0; i < meta.length; i++ ) {
            RuleMetadata rmd = meta[ i ];
            layout.addAttribute( rmd.getAttributeName(),
                                 getEditorWidget( rmd,
                                                  i,
                                                  isReadOnly ) );
        }
        RuleAttribute[] attrs = model.attributes;
        if ( attrs.length > 0 ) {
            HorizontalPanel hp = new HorizontalPanel();
            hp.add( new SmallLabel( Constants.INSTANCE.Attributes1() ) );
            layout.addRow( hp );
        }
        for ( int i = 0; i < attrs.length; i++ ) {
            RuleAttribute at = attrs[ i ];
            layout.addAttribute( at.getAttributeName(),
                                 getEditorWidget( at,
                                                  i,
                                                  isReadOnly ) );
        }

        initWidget( layout );
    }

    /**
     * Return a listbox of choices for rule attributes.
     * @return
     */
    public static ListBox getAttributeList() {
        ListBox list = new ListBox();
        list.addItem( Constants.INSTANCE.Choose() );

        list.addItem( SALIENCE_ATTR );
        list.addItem( ENABLED_ATTR );
        list.addItem( DATE_EFFECTIVE_ATTR );
        list.addItem( DATE_EXPIRES_ATTR );
        list.addItem( NO_LOOP_ATTR );
        list.addItem( AGENDA_GROUP_ATTR );
        list.addItem( ACTIVATION_GROUP_ATTR );
        list.addItem( DURATION_ATTR );
        list.addItem( TIMER_ATTR );
        list.addItem( CALENDARS_ATTR );
        list.addItem( DURATION_ATTR );
        list.addItem( AUTO_FOCUS_ATTR );
        list.addItem( LOCK_ON_ACTIVE_ATTR );
        list.addItem( RULEFLOW_GROUP_ATTR );
        list.addItem( DIALECT_ATTR );

        return list;
    }

    private Widget getEditorWidget( final RuleAttribute at,
                                    final int idx,
                                    final boolean isReadOnly ) {
        Widget editor;

        if ( at.getAttributeName().equals( ENABLED_ATTR ) || at.getAttributeName().equals( AUTO_FOCUS_ATTR ) || at.getAttributeName().equals( LOCK_ON_ACTIVE_ATTR ) || at.getAttributeName().equals( NO_LOOP_ATTR ) ) {
            editor = checkBoxEditor( at,
                                     isReadOnly );
        } else {
            editor = textBoxEditor( at,
                                    isReadOnly );
        }

        DirtyableHorizontalPane horiz = new DirtyableHorizontalPane();
        horiz.add( editor );
        if ( !isReadOnly ) {
            horiz.add( getRemoveIcon( idx ) );
        }

        return horiz;
    }

    private Widget getEditorWidget( final RuleMetadata rm,
                                    final int idx,
                                    final boolean isReadOnly ) {
        Widget editor;

        if ( rm.getAttributeName().equals( LOCK_LHS ) || rm.getAttributeName().equals( LOCK_RHS ) ) {
            editor = new InfoPopup( Constants.INSTANCE.FrozenAreas(),
                                    Constants.INSTANCE.FrozenExplanation() );
        } else {
            editor = textBoxEditor( rm,
                                    isReadOnly );
        }

        DirtyableHorizontalPane horiz = new DirtyableHorizontalPane();
        horiz.add( editor );
        if ( !isReadOnly ) {
            horiz.add( getRemoveMetaIcon( idx ) );
        }

        return horiz;
    }

    private Widget checkBoxEditor( final RuleAttribute at,
                                   final boolean isReadOnly ) {
        final CheckBox box = new CheckBox();
        box.setEnabled( !isReadOnly );
        if ( at.getValue() == null ) {
            box.setValue( true );
            at.setValue( TRUE_VALUE );
        } else {
            box.setValue( ( at.getValue().equals( TRUE_VALUE ) ) );
        }

        box.addClickHandler( new ClickHandler() {
            public void onClick( ClickEvent event ) {
                at.setValue( ( box.getValue() ) ? TRUE_VALUE : FALSE_VALUE );
            }
        } );
        return box;
    }

    private TextBox textBoxEditor( final RuleAttribute at,
                                   final boolean isReadOnly ) {
        final TextBox box = new TextBox();
        box.setEnabled( !isReadOnly );
        box.setVisibleLength( ( at.getValue().length() < 3 ) ? 3 : at.getValue().length() );
        box.setText( at.getValue() );
        box.addChangeHandler( new ChangeHandler() {
            public void onChange( ChangeEvent event ) {
                at.setValue( box.getText() );
            }
        } );

        if ( at.getAttributeName().equals( DATE_EFFECTIVE_ATTR ) || at.getAttributeName().equals( DATE_EXPIRES_ATTR ) ) {
            if ( at.getValue() == null || "".equals( at.getValue() ) ) {
                box.setText( "" );
            }

            box.setVisibleLength( 10 );
        }

        box.addKeyUpHandler( new KeyUpHandler() {
            public void onKeyUp( KeyUpEvent event ) {
                int length = box.getText().length();
                box.setVisibleLength( length > 0 ? length : 1 );
            }
        } );
        return box;
    }

    private TextBox textBoxEditor( final RuleMetadata rm,
                                   final boolean isReadOnly ) {
        final TextBox box = new TextBox();
        box.setEnabled( !isReadOnly );
        box.setVisibleLength( ( rm.getValue().length() < 3 ) ? 3 : rm.getValue().length() );
        box.setText( rm.getValue() );
        box.addChangeHandler( new ChangeHandler() {
            public void onChange( ChangeEvent event ) {
                rm.setValue( box.getText() );
            }
        } );

        box.addKeyUpHandler( new KeyUpHandler() {
            public void onKeyUp( KeyUpEvent event ) {
                box.setVisibleLength( box.getText().length() );
            }
        } );
        return box;
    }

    private Image getRemoveIcon( final int idx ) {
        Image remove = new Image( ItemImages.INSTANCE.deleteItemSmall() );
        remove.addClickHandler( new ClickHandler() {
            public void onClick( ClickEvent event ) {
                if ( Window.confirm( Constants.INSTANCE.RemoveThisRuleOption() ) ) {
                    model.removeAttribute( idx );
                    parent.refreshWidget();
                }
            }
        } );
        return remove;
    }

    private Image getRemoveMetaIcon( final int idx ) {
        Image remove = new Image( ItemImages.INSTANCE.deleteItemSmall() );
        remove.addClickHandler( new ClickHandler() {
            public void onClick( ClickEvent event ) {
                if ( Window.confirm( Constants.INSTANCE.RemoveThisRuleOption() ) ) {
                    model.removeMetadata( idx );
                    parent.refreshWidget();
                }
            }
        } );
        return remove;
    }
}
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