/*
* Copyright 2005 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.Iterator;
import java.util.List;
import org.drools.guvnor.client.common.DirtyableComposite;
import org.drools.guvnor.client.common.SmallLabel;
import org.drools.guvnor.client.common.ValueChanged;
import org.drools.guvnor.client.messages.Constants;
import org.drools.guvnor.client.util.Format;
import org.drools.ide.common.client.modeldriven.SuggestionCompletionEngine;
import org.drools.ide.common.client.modeldriven.brl.DSLSentence;
import org.drools.ide.common.client.modeldriven.ui.ConstraintValueEditorHelper;
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.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
/**
* This displays a widget to edit a DSL sentence.
*
* @author Michael Neale
*/
public class DSLSentenceWidget extends RuleModellerWidget {
private static final String ENUM_TAG = "ENUM";
private static final String DATE_TAG = "DATE";
private static final String BOOLEAN_TAG = "BOOLEAN";
private final List<Widget> widgets;
private final DSLSentence sentence;
private final VerticalPanel layout;
private HorizontalPanel currentRow;
private boolean readOnly;
public DSLSentenceWidget(RuleModeller modeller, DSLSentence sentence) {
this(modeller, sentence, null);
}
public DSLSentenceWidget(RuleModeller modeller, DSLSentence sentence, Boolean readOnly) {
super (modeller);
widgets = new ArrayList<Widget>();
this.sentence = sentence;
if (readOnly == null){
this.readOnly = false;
}else{
this.readOnly = readOnly;
}
this.layout = new VerticalPanel();
this.currentRow = new HorizontalPanel();
this.layout.add( currentRow );
this.layout.setCellWidth( currentRow,
"100%" );
this.layout.setWidth( "100%" );
if (this.readOnly) {
this.layout.addStyleName("editor-disabled-widget");
}
init();
}
private void init() {
makeWidgets( this.sentence.sentence );
initWidget( this.layout );
}
/**
* This will take a DSL line item, and split it into widget thingamies for
* displaying. One day, if this is too complex, this will have to be done on
* the server side.
*/
public void makeWidgets(String dslLine) {
int startVariable = dslLine.indexOf( "{" );
List<Widget> lineWidgets = new ArrayList<Widget>();
boolean firstOneIsBracket = (dslLine.indexOf( "{" ) == 0);
String startLabel = "";
if ( startVariable > 0 ) {
startLabel = dslLine.substring( 0,
startVariable );
} else if ( !firstOneIsBracket ) {
// There are no curly brackets in the text.
// Just print it
startLabel = dslLine;
}
Widget label = getLabel( startLabel );
lineWidgets.add( label );
while ( startVariable > 0 || firstOneIsBracket ) {
firstOneIsBracket = false;
int endVariable = dslLine.indexOf( "}",
startVariable );
String currVariable = dslLine.substring( startVariable + 1,
endVariable );
Widget varWidget = processVariable( currVariable );
lineWidgets.add( varWidget );
// Parse out the next label between variables
startVariable = dslLine.indexOf( "{",
endVariable );
String lbl;
if ( startVariable > 0 ) {
lbl = dslLine.substring( endVariable + 1,
startVariable );
} else {
lbl = dslLine.substring( endVariable + 1,
dslLine.length() );
}
if ( lbl.indexOf( "\\n" ) > -1 ) {
String[] lines = lbl.split( "\\\\n" );
for ( int i = 0; i < lines.length; i++ ) {
lineWidgets.add( new NewLine() );
lineWidgets.add( getLabel( lines[i] ) );
}
} else {
Widget currLabel = getLabel( lbl );
lineWidgets.add( currLabel );
}
}
for ( Widget widg : lineWidgets ) {
addWidget( widg );
}
updateSentence();
}
class NewLine extends Widget {
}
public Widget processVariable(String currVariable) {
Widget result = null;
// Formats are: <varName>:ENUM:<Field.type>
// <varName>:DATE:<dateFormat>
// <varName>:BOOLEAN:[checked | unchecked] <-initial value
if ( currVariable.contains( ":" ) ) {
if ( currVariable.contains( ":" + ENUM_TAG + ":" ) ) {
result = getEnumDropdown( currVariable );
} else if ( currVariable.contains( ":" + DATE_TAG + ":" ) ) {
result = getDateSelector( currVariable );
} else if ( currVariable.contains( ":" + BOOLEAN_TAG + ":" ) ) {
result = getCheckbox( currVariable );
} else {
String regex = currVariable.substring( currVariable.indexOf( ":" ) + 1,
currVariable.length() );
result = getBox( currVariable,
regex );
}
} else {
result = getBox( currVariable,
"" );
}
return result;
}
public Widget getEnumDropdown(String variableDef) {
Widget resultWidget = new DSLDropDown( variableDef );
return resultWidget;
}
public Widget getBox(String variableDef,
String regex) {
int colonIndex = variableDef.indexOf( ":" );
if ( colonIndex > 0 ) {
variableDef = variableDef.substring( 0,
colonIndex );
}
FieldEditor currentBox = new FieldEditor();
currentBox.setVisibleLength( variableDef.length() + 1 );
currentBox.setText( variableDef );
currentBox.setRestriction( regex );
return currentBox;
}
public Widget getCheckbox(String variableDef) {
return new DSLCheckBox( variableDef );
}
public Widget getDateSelector(String variableDef) {
String[] parts = variableDef.split( ":" + DATE_TAG + ":" );
return new DSLDateSelector( parts[0],
parts[1] );
}
public Widget getLabel(String labelDef) {
Label label = new SmallLabel();
label.setText( labelDef );
return label;
}
private void addWidget(Widget currentBox) {
if ( currentBox instanceof NewLine ) {
currentRow = new HorizontalPanel();
layout.add( currentRow );
layout.setCellWidth( currentRow,
"100%" );
} else {
currentRow.add( currentBox );
}
widgets.add( currentBox );
}
/**
* This will go through the widgets and build up a sentence.
*/
protected void updateSentence() {
String newSentence = "";
for ( Iterator<Widget> iter = widgets.iterator(); iter.hasNext(); ) {
Widget wid = iter.next();
if ( wid instanceof Label ) {
newSentence = newSentence + ((Label) wid).getText();
} else if ( wid instanceof FieldEditor ) {
FieldEditor editor = (FieldEditor) wid;
String varString = editor.getText();
String restriction = editor.getRestriction();
if ( !restriction.equals( "" ) ) {
varString = varString + ":" + restriction;
}
newSentence = newSentence + "{" + varString + "}";
} else if ( wid instanceof DSLDropDown ) {
// Add the meta-data back to the field so that is shows up as a
// dropdown when refreshed from repo
DSLDropDown drop = (DSLDropDown) wid;
ListBox box = drop.getListBox();
String type = drop.getType();
String factAndField = drop.getFactAndField();
newSentence = newSentence + "{" + box.getValue( box.getSelectedIndex() ) + ":" + type + ":" + factAndField + "} ";
} else if ( wid instanceof DSLCheckBox ) {
DSLCheckBox check = (DSLCheckBox) wid;
String checkValue = check.getCheckedValue();
newSentence = newSentence + "{" + checkValue + ":" + check.getType() + ":" + checkValue + "} ";
} else if ( wid instanceof DSLDateSelector ) {
DSLDateSelector dateSel = (DSLDateSelector) wid;
String dateString = dateSel.getDateString();
String format = dateSel.getVisualFormat();
newSentence = newSentence + "{" + dateString + ":" + dateSel.getType() + ":" + format + "} ";
} else if ( wid instanceof NewLine ) {
newSentence = newSentence + "\\n";
}
}
this.setModified(true);
this.sentence.sentence = newSentence.trim();
}
class FieldEditor extends DirtyableComposite {
private TextBox box;
private HorizontalPanel panel = new HorizontalPanel();
private String oldValue = "";
private String regex = "";
private Constants constants = ((Constants) GWT.create( Constants.class ));
public FieldEditor() {
box = new TextBox();
// box.setStyleName( "dsl-field-TextBox" );
panel.add( new HTML( " " ) );
panel.add( box );
panel.add( new HTML( " " ) );
box.addChangeHandler(new ChangeHandler() {
public void onChange(ChangeEvent event) {
TextBox otherBox = (TextBox) event.getSource();
if (!regex.equals("") && !otherBox.getText().matches(regex)) {
Window.alert(Format.format(
constants.TheValue0IsNotValidForThisField(),
otherBox.getText()));
box.setText(oldValue);
} else {
oldValue = otherBox.getText();
updateSentence();
makeDirty();
}
}
});
initWidget( panel );
}
public void setText(String t) {
box.setText( t );
}
public void setVisibleLength(int l) {
box.setVisibleLength( l );
}
public String getText() {
return box.getText();
}
public void setRestriction(String regex) {
this.regex = regex;
}
public String getRestriction() {
return this.regex;
}
public boolean isValid() {
boolean result = true;
if ( !regex.equals( "" ) ) result = this.box.getText().matches( this.regex );
return result;
}
}
class DSLDropDown extends DirtyableComposite {
final SuggestionCompletionEngine completions = getModeller().getSuggestionCompletions();
ListBox resultWidget = null;
// Format for the dropdown def is <varName>:<type>:<Fact.field>
private String varName = "";
private String type = "";
private String factAndField = "";
public DSLDropDown(String variableDef) {
int firstIndex = variableDef.indexOf( ":" );
int lastIndex = variableDef.lastIndexOf( ":" );
varName = variableDef.substring( 0,
firstIndex );
type = variableDef.substring( firstIndex + 1,
lastIndex );
factAndField = variableDef.substring( lastIndex + 1,
variableDef.length() );
int dotIndex = factAndField.indexOf( "." );
String type = factAndField.substring( 0,
dotIndex );
String field = factAndField.substring( dotIndex + 1,
factAndField.length() );
String[] data = completions.getEnumValues( type,
field );
ListBox list = new ListBox();
if ( data != null ) {
int selected = -1;
for ( int i = 0; i < data.length; i++ ) {
String realValue = data[i];
String display = data[i];
if ( data[i].indexOf( '=' ) > -1 ) {
String[] vs = ConstraintValueEditorHelper.splitValue( data[i] );
realValue = vs[0];
display = vs[1];
}
if ( varName.equals( realValue ) ) {
selected = i;
}
list.addItem( display,
realValue );
}
if ( selected >= 0 ) list.setSelectedIndex( selected );
}
list.addChangeHandler(new ChangeHandler() {
public void onChange(ChangeEvent event) {
updateSentence();
makeDirty();
}
});
initWidget( list );
resultWidget = list;
}
public ListBox getListBox() {
return resultWidget;
}
public void setListBox(ListBox resultWidget) {
this.resultWidget = resultWidget;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getFactAndField() {
return factAndField;
}
public void setFactAndField(String factAndField) {
this.factAndField = factAndField;
}
}
class DSLCheckBox extends Composite {
ListBox resultWidget = null;
// Format for the dropdown def is <varName>:<type>:<Fact.field>
private String varName = "";
public DSLCheckBox(String variableDef) {
int firstIndex = variableDef.indexOf( ":" );
int lastIndex = variableDef.lastIndexOf( ":" );
varName = variableDef.substring( 0,
firstIndex );
String checkedUnchecked = variableDef.substring( lastIndex + 1,
variableDef.length() );
resultWidget = new ListBox();
resultWidget.addItem( "true" );
resultWidget.addItem( "false" );
if ( checkedUnchecked.equalsIgnoreCase( "true" ) ) {
resultWidget.setSelectedIndex( 0 );
} else {
resultWidget.setSelectedIndex( 1 );
}
resultWidget.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
updateSentence();
}
});
resultWidget.setVisible( true );
initWidget( resultWidget );
}
public ListBox getListBox() {
return resultWidget;
}
public void setListBox(ListBox resultWidget) {
this.resultWidget = resultWidget;
}
public String getType() {
return BOOLEAN_TAG;
}
public String getVarName() {
return varName;
}
public void setVarName(String varName) {
this.varName = varName;
}
public String getCheckedValue() {
return this.resultWidget.getSelectedIndex() == 0 ? "true" : "false";
}
}
class DSLDateSelector extends DatePickerLabel {
public DSLDateSelector(String selectedDate,
String dateFormat) {
super( selectedDate,
dateFormat );
addValueChanged( new ValueChanged() {
public void valueChanged(String newValue) {
updateSentence();
}
} );
}
public String getType() {
return DATE_TAG;
}
}
@Override
public boolean isReadOnly() {
return this.readOnly;
}
}