/*
* Copyright 2010 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.guvnor.client.modeldriven.ui;
import java.util.ArrayList;
import java.util.List;
import org.drools.guvnor.client.common.DirtyableComposite;
import org.drools.guvnor.client.common.DropDownValueChanged;
import org.drools.guvnor.client.common.FormStylePopup;
import org.drools.guvnor.client.common.InfoPopup;
import org.drools.guvnor.client.common.SmallLabel;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.resources.Images;
import org.drools.guvnor.client.util.NumbericFilterKeyPressHandler;
import org.drools.ide.common.client.modeldriven.DropDownData;
import org.drools.ide.common.client.modeldriven.FieldNature;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import org.drools.ide.common.client.modeldriven.brl.ActionFieldValue;
import org.drools.ide.common.client.modeldriven.brl.ActionInsertFact;
import org.drools.ide.common.client.modeldriven.brl.FactPattern;
import org.drools.ide.common.client.modeldriven.brl.FieldConstraint;
import org.drools.ide.common.client.modeldriven.brl.SingleFieldConstraint;
import com.google.gwt.core.client.GWT;
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.Command;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.HTML;
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.SimplePanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;
/**
* This provides for editing of fields in the RHS of a rule.
*/
public class ActionValueEditor extends DirtyableComposite {
private Constants constants = GWT.create( Constants.class );
private Images images = GWT.create( Images.class );
private ActionFieldValue value;
private DropDownData enums;
private SimplePanel root;
private RuleModeller model = null;
private String variableType = null;
private boolean readOnly;
private Command onChangeCommand;
public ActionValueEditor(final ActionFieldValue val,
final DropDownData enums,
boolean readOnly) {
this( val,
enums,
null,
null,
readOnly );
}
public ActionValueEditor(final ActionFieldValue val,
final DropDownData enums) {
this( val,
enums,
false );
}
public ActionValueEditor(final ActionFieldValue val,
final DropDownData enums,
RuleModeller model,
String variableType) {
this( val,
enums,
model,
variableType,
false );
}
public ActionValueEditor(final ActionFieldValue val,
final DropDownData enums,
RuleModeller model,
String variableType,
boolean readOnly) {
this.readOnly = readOnly;
if ( val.type.equals( SuggestionCompletionEngine.TYPE_BOOLEAN ) ) {
this.enums = DropDownData.create( new String[]{"true", "false"} );
} else {
this.enums = enums;
}
this.root = new SimplePanel();
this.value = val;
this.model = model;
this.variableType = variableType;
refresh();
initWidget( root );
}
private void refresh() {
root.clear();
//If undefined let the user pick
if ( value.nature == FieldNature.TYPE_UNDEFINED ) {
//Automatic decisions regarding FieldNature
if ( value.value != null && value.value.length() > 0 ) {
if ( value.value.charAt( 0 ) == '=' ) {
value.nature = FieldNature.TYPE_VARIABLE;
} else {
value.nature = FieldNature.TYPE_LITERAL;
}
} else {
root.add( choice() );
return;
}
}
//Template TextBoxes are always Strings as they hold the template key for the actual value
if ( value.nature == FieldNature.TYPE_TEMPLATE ) {
Widget box = boundTextBox( this.value );
root.add( box );
return;
}
//Variable fields (including bound enumeration fields)
if ( value.nature == FieldNature.TYPE_VARIABLE ) {
Widget list = boundVariable( value );
root.add( list );
return;
}
//Enumerations - since this does not use FieldNature it should follow those that do
if ( enums != null && (enums.fixedList != null || enums.queryExpression != null) ) {
Widget list = boundEnum( value );
root.add( list );
return;
}
//Fall through for all remaining FieldNatures
Widget box = boundTextBox( this.value );
root.add( box );
}
private Widget boundVariable(final FieldNature c) {
// If there is a bound variable that is the same type of the current variable type, then display a list
ListBox listVariable = new ListBox();
listVariable.addItem( constants.Choose() );
List<String> bindings = getApplicableBindings();
for ( String v : bindings ) {
listVariable.addItem( v );
}
//Pre-select applicable item
if ( value.value.equals( "=" ) ) {
listVariable.setSelectedIndex( 0 );
} else {
for ( int i = 0; i < listVariable.getItemCount(); i++ ) {
if ( listVariable.getItemText( i ).equals( value.value.substring( 1 ) ) ) {
listVariable.setSelectedIndex( i );
}
}
}
//Add event handler
if ( listVariable.getItemCount() > 0 ) {
listVariable.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
ListBox w = (ListBox) event.getSource();
value.value = "=" + w.getValue( w.getSelectedIndex() );
executeOnChageCommand();
makeDirty();
refresh();
}
} );
}
if ( this.readOnly ) {
return new SmallLabel( listVariable.getItemText( listVariable.getSelectedIndex() ) );
}
return listVariable;
}
private Widget boundEnum(final FieldNature c) {
EnumDropDown enumDropDown = new EnumDropDown( value.value,
new DropDownValueChanged() {
public void valueChanged(String newText,
String newValue) {
value.value = newValue;
executeOnChageCommand();
makeDirty();
}
},
enums );
if ( this.readOnly ) {
return new SmallLabel( enumDropDown.getItemText( enumDropDown.getSelectedIndex() ) );
} else {
return enumDropDown;
}
}
private Widget boundTextBox(final ActionFieldValue c) {
final TextBox box = new TextBox();
box.setStyleName( "constraint-value-Editor" );
if ( c.value == null ) {
box.setText( "" );
} else {
if ( c.value.trim().equals( "" ) ) {
c.value = "";
}
box.setText( c.value );
}
if ( c.value == null || c.value.length() < 5 ) {
box.setVisibleLength( 6 );
} else {
box.setVisibleLength( c.value.length() - 1 );
}
box.addChangeHandler( new ChangeHandler() {
public void onChange(ChangeEvent event) {
c.value = box.getText();
executeOnChageCommand();
makeDirty();
}
} );
box.addKeyUpHandler( new KeyUpHandler() {
public void onKeyUp(KeyUpEvent event) {
box.setVisibleLength( box.getText().length() );
}
} );
//Template TextBoxes are always Strings as they hold the template key for the actual value
if ( value.nature != FieldNature.TYPE_TEMPLATE && value.type.equals( SuggestionCompletionEngine.TYPE_NUMERIC ) ) {
box.addKeyPressHandler( new NumbericFilterKeyPressHandler( box ) );
}
if ( this.readOnly ) {
return new SmallLabel( box.getText() );
}
return box;
}
private Widget choice() {
if ( this.readOnly ) {
return new HTML();
} else {
Image clickme = new Image( images.edit() );
clickme.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
showTypeChoice( (Widget) event.getSource() );
}
} );
return clickme;
}
}
protected void showTypeChoice(Widget w) {
final FormStylePopup form = new FormStylePopup( images.newexWiz(),
constants.FieldValue() );
Button lit = new Button( constants.LiteralValue() );
lit.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
value.nature = FieldNature.TYPE_LITERAL;
value.value = "";
makeDirty();
executeOnChageCommand();
refresh();
form.hide();
}
} );
form.addAttribute( constants.LiteralValue() + ":",
widgets( lit,
new InfoPopup( constants.Literal(),
constants.ALiteralValueMeansTheValueAsTypedInIeItsNotACalculation() ) ) );
if ( model.isTemplate() ) {
Button templateButton = new Button( constants.TemplateKey() );
templateButton.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
value.nature = FieldNature.TYPE_TEMPLATE;
value.value = "";
makeDirty();
refresh();
form.hide();
}
} );
form.addAttribute( constants.TemplateKey() + ":",
widgets( templateButton,
new InfoPopup( constants.Literal(),
constants.ALiteralValueMeansTheValueAsTypedInIeItsNotACalculation() ) ) );
}
form.addRow( new HTML( "<hr/>" ) );
form.addRow( new SmallLabel( constants.AdvancedSection() ) );
Button formula = new Button( constants.Formula() );
formula.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
value.nature = FieldNature.TYPE_FORMULA;
value.value = "=";
makeDirty();
refresh();
form.hide();
}
} );
// If there is a bound Facts or Fields that are of the same type as the current variable type, then show a button
List<String> bindings = getApplicableBindings();
if ( bindings.size() > 0 ) {
Button variable = new Button( constants.BoundVariable() );
form.addAttribute( constants.BoundVariable() + ":",
variable );
variable.addClickHandler( new ClickHandler() {
public void onClick(ClickEvent event) {
value.nature = FieldNature.TYPE_VARIABLE;
value.value = "=";
makeDirty();
refresh();
form.hide();
}
} );
}
form.addAttribute( constants.Formula() + ":",
widgets( formula,
new InfoPopup( constants.Formula(),
constants.FormulaTip() ) ) );
form.show();
}
private List<String> getApplicableBindings() {
List<String> bindings = new ArrayList<String>();
//Examine LHS Fact and Field bindings and RHS (new) Fact bindings
for ( String v : model.getModel().getAllVariables() ) {
//LHS FactPattern
FactPattern fp = model.getModel().getLHSBoundFact( v );
if ( fp != null ) {
if ( isLHSFactTypeEquivalent( v ) ) {
bindings.add( v );
}
}
//LHS FieldConstraint
FieldConstraint fc = model.getModel().getLHSBoundField( v );
if ( fc != null ) {
if ( isLHSFieldTypeEquivalent( v ) ) {
bindings.add( v );
}
}
//RHS ActionInsertFact
ActionInsertFact aif = model.getModel().getRHSBoundFact( v );
if ( aif != null ) {
if ( isRHSFieldTypeEquivalent( v ) ) {
bindings.add( v );
}
}
}
return bindings;
}
private boolean isLHSFactTypeEquivalent(String boundVariable) {
String boundFactType = model.getModel().getLHSBoundFact( boundVariable ).getFactType();
//If the types are SuggestionCompletionEngine.TYPE_COMPARABLE check the enums are equivalent
if ( boundFactType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
if ( !this.variableType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
return false;
}
String[] dd = this.model.getSuggestionCompletions().getEnumValues( boundFactType,
this.value.field );
return isEnumEquivalent( dd );
}
//If the types are identical (and not SuggestionCompletionEngine.TYPE_COMPARABLE) then return true
if ( boundFactType.equals( this.variableType ) ) {
return true;
}
return false;
}
private boolean isLHSFieldTypeEquivalent(String boundVariable) {
String boundFieldType = model.getModel().getLHSBindingType( boundVariable );
//If the fieldTypes are SuggestionCompletionEngine.TYPE_COMPARABLE check the enums are equivalent
if ( boundFieldType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
if ( !this.variableType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
return false;
}
FieldConstraint fc = this.model.getModel().getLHSBoundField( boundVariable );
if ( fc instanceof SingleFieldConstraint ) {
String fieldName = ((SingleFieldConstraint) fc).getFieldName();
String parentFactTypeForBinding = this.model.getModel().getLHSParentFactPatternForBinding( boundVariable ).getFactType();
String[] dd = this.model.getSuggestionCompletions().getEnumValues( parentFactTypeForBinding,
fieldName );
return isEnumEquivalent( dd );
}
return false;
}
//If the fieldTypes are identical (and not SuggestionCompletionEngine.TYPE_COMPARABLE) then return true
if ( boundFieldType.equals( this.variableType ) ) {
return true;
}
return false;
}
private boolean isRHSFieldTypeEquivalent(String boundVariable) {
String boundFactType = model.getModel().getRHSBoundFact( boundVariable ).factType;
if ( boundFactType == null ) {
return false;
}
if ( this.variableType == null ) {
return false;
}
//If the types are SuggestionCompletionEngine.TYPE_COMPARABLE check the enums are equivalent
if ( boundFactType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
if ( !this.variableType.equals( SuggestionCompletionEngine.TYPE_COMPARABLE ) ) {
return false;
}
String[] dd = this.model.getSuggestionCompletions().getEnumValues( boundFactType,
this.value.field );
return isEnumEquivalent( dd );
}
//If the types are identical (and not SuggestionCompletionEngine.TYPE_COMPARABLE) then return true
if ( boundFactType.equals( this.variableType ) ) {
return true;
}
return false;
}
private boolean isEnumEquivalent(String[] values) {
if ( values == null && this.enums.fixedList != null ) {
return false;
}
if ( values != null && this.enums.fixedList == null ) {
return false;
}
if ( values.length != this.enums.fixedList.length ) {
return false;
}
for ( int i = 0; i < values.length; i++ ) {
if ( !values[i].equals( this.enums.fixedList[i] ) ) {
return false;
}
}
return true;
}
private Widget widgets(Button lit,
InfoPopup popup) {
HorizontalPanel h = new HorizontalPanel();
h.add( lit );
h.add( popup );
return h;
}
private void executeOnChageCommand() {
if ( this.onChangeCommand != null ) {
this.onChangeCommand.execute();
}
}
public Command getOnChangeCommand() {
return onChangeCommand;
}
public void setOnChangeCommand(Command onChangeCommand) {
this.onChangeCommand = onChangeCommand;
}
}