/*******************************************************************************
* Copyright 2017 Capital One Services, LLC and Bitwise, 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 hydrograph.ui.propertywindow.widgets.customwidgets.databasecomponents;
import java.util.LinkedList;
import java.util.List;
import org.apache.commons.lang.StringUtils;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.ExtendedModifyEvent;
import org.eclipse.swt.custom.ExtendedModifyListener;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import hydrograph.ui.propertywindow.messages.Messages;
/**
* The Class SQLQueryStatementDialog
* @author Bitwise
*
*/
public class SQLQueryStatementDialog extends Dialog {
private StyledText styledText;
private String styleTextValue;
private String textValue;
private String styleTextOldValue;
private boolean isTextChanged = false;
private int MAX_STACK_SIZE;
private List<String> undoActionList;
private List<String> redoActionList;
/**
* Create the dialog.
* @param parentShell
*/
public SQLQueryStatementDialog(Shell parentShell, String textValue) {
super(parentShell);
setShellStyle(SWT.CLOSE | SWT.TITLE | SWT.WRAP | SWT.APPLICATION_MODAL | SWT.RESIZE);
this.textValue = textValue;
undoActionList = new LinkedList<>();
redoActionList = new LinkedList<>();
}
/**
* Create contents of the dialog.
* @param parent
*/
@Override
protected Control createDialogArea(Composite parent) {
final Composite container = (Composite) super.createDialogArea(parent);
container.getShell().setText(Messages.DATABASE_SQL_QUERY);
Composite composite = new Composite(container, SWT.NONE);
composite.setLayout(new GridLayout(1, false));
composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
Label sqlQueryLabel = new Label(composite, SWT.NONE);
sqlQueryLabel.setText(Messages.SQL_QUERY_STATEMENT);
styledText = new StyledText(composite, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL|SWT.MULTI|SWT.WRAP);
styledText.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
styledText.setFont(new Font(Display.getCurrent(),"Courier New",9,SWT.NORMAL));
styledText.setText(textValue);
styledText.addExtendedModifyListener(new ExtendedModifyListener() {
@Override
public void modifyText(ExtendedModifyEvent event) {
MAX_STACK_SIZE = styledText.getText().length();
String currText = styledText.getText();
String newText = currText.substring(event.start, event.start + event.length);
if(newText != null && newText.length() > 0){
if(undoActionList.size() == MAX_STACK_SIZE){
undoActionList.remove(undoActionList.size() - 1);
}
undoActionList.add(0, newText);
}
}
});
styledText.addKeyListener(new KeyListener() {
@Override
public void keyReleased(KeyEvent event) {
}
@Override
public void keyPressed(KeyEvent event) {
boolean isCtrl = (event.stateMask & SWT.CTRL) > 0;
boolean isAlt = (event.stateMask & SWT.ALT) > 0;
if(isCtrl && !isAlt) {
boolean isShift = (event.stateMask & SWT.SHIFT) > 0;
if(!isShift && event.keyCode == 'z') {
undo();
} else if(!isShift && event.keyCode == 'y' || isShift && event.keyCode == 'z') {
redo();
}
}
}
});
styleTextOldValue = styledText.getText();
return container;
}
private void undo() {
if (undoActionList.size() > 0) {
String lastEdit = (String) undoActionList.remove(0);
int editLength = lastEdit.length();
String currText = styledText.getText();
int startReplaceIndex = currText.length() - editLength;
styledText.replaceTextRange(startReplaceIndex, editLength, "");
redoActionList.add(0, lastEdit);
}
}
private void redo() {
if (redoActionList.size() > 0) {
String text = (String) redoActionList.remove(0);
moveCursorToEnd();
styledText.append(text);
moveCursorToEnd();
}
}
private void moveCursorToEnd() {
styledText.setCaretOffset(styledText.getText().length());
}
private void compareTextValue(String newTextValue){
if(styleTextOldValue != newTextValue){
isTextChanged = true;
}else{
isTextChanged = false;
}
}
/**
* The Function will return boolean if text value will be changed
* @return boolean
*/
public boolean isTextValueChanged(){
return isTextChanged;
}
/**
* Create contents of the button bar.
* @param parent
*/
@Override
protected void createButtonsForButtonBar(Composite parent) {
createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false);
}
@Override
protected void okPressed() {
if(styledText !=null){
styleTextValue = styledText.getText();
if(StringUtils.isNotBlank(styleTextValue)){
compareTextValue(styleTextValue);
setStyleTextSqlQuery(styleTextValue);
}
}
super.okPressed();
}
public String getStyleTextSqlQuery(){
return styleTextValue;
}
public String setStyleTextSqlQuery(String styleTextValue){
return styleTextValue;
}
/**
* Return the initial size of the dialog.
*/
@Override
protected Point getInitialSize() {
return new Point(612, 254);
}
}