/*******************************************************************************
* Copyright (c) 2004, 2013 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Brock Janiczak (brockj@tpg.com.au) - Bug 145736
*******************************************************************************/
package org.eclipse.ant.internal.ui.antsupport.inputhandler;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.input.DefaultInputHandler;
import org.apache.tools.ant.input.InputRequest;
import org.apache.tools.ant.input.MultipleChoiceInputRequest;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class SWTInputHandler extends DefaultInputHandler {
private Text fText;
private Combo fCombo;
private Text fErrorMessageText;
private Button fOkButton;
private Shell fDialog;
private FontMetrics fFontMetrics;
protected InputRequest fRequest;
private boolean fFirstValidation = true;
/*
* (non-Javadoc)
*
* @see org.apache.tools.ant.input.InputHandler#handleInput(org.apache.tools.ant.input.InputRequest)
*/
@Override
public void handleInput(InputRequest request) throws BuildException {
if (System.getProperty("eclipse.ant.noInput") != null) { //$NON-NLS-1$
throw new BuildException(RemoteAntMessages.getString("SWTInputHandler.0")); //$NON-NLS-1$
}
fFirstValidation = true;
fRequest = request;
BuildException[] problem = new BuildException[1];
Runnable runnable = getHandleInputRunnable(problem);
Display.getDefault().syncExec(runnable);
if (problem[0] != null) {
throw problem[0];
}
}
protected Runnable getHandleInputRunnable(final BuildException[] problem) {
return new Runnable() {
@Override
public void run() {
String prompt;
if (fRequest instanceof MultipleChoiceInputRequest) {
prompt = fRequest.getPrompt();
} else {
prompt = getPrompt(fRequest);
}
String title = RemoteAntMessages.getString("SWTInputHandler.1"); //$NON-NLS-1$
boolean[] result = new boolean[1];
open(title, prompt, result);
if (!result[0]) {
problem[0] = new BuildException(RemoteAntMessages.getString("SWTInputHandler.2")); //$NON-NLS-1$
}
}
};
}
protected void open(String title, String prompt, boolean[] result) {
createDialog(title, prompt, result);
validateInput();
fDialog.open();
while (!fDialog.isDisposed()) {
if (!fDialog.getDisplay().readAndDispatch())
fDialog.getDisplay().sleep();
}
Display.getDefault().dispose();
}
private void createDialog(String title, String prompt, boolean[] result) {
Display display = Display.getDefault();
fDialog = new Shell(display, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE);
initializeDialogUnits(fDialog);
fDialog.setLayout(new GridLayout());
GridData gd = new GridData(SWT.FILL);
gd.horizontalSpan = 2;
fDialog.setLayoutData(gd);
fDialog.setText(title);
Label label = new Label(fDialog, SWT.WRAP);
label.setText(prompt);
GridData data = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL
| GridData.VERTICAL_ALIGN_CENTER);
data.widthHint = convertHorizontalDLUsToPixels(300); // from IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH
label.setLayoutData(data);
label.setFont(fDialog.getFont());
if (fRequest instanceof MultipleChoiceInputRequest) {
fCombo = new Combo(fDialog, SWT.BORDER | SWT.READ_ONLY);
fCombo.add(""); //$NON-NLS-1$
for (String text : ((MultipleChoiceInputRequest) fRequest).getChoices()) {
fCombo.add(text);
fCombo.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
fCombo.addSelectionListener(new SelectionAdapter() {
@Override
public void widgetSelected(SelectionEvent e) {
validateInput();
}
});
}
} else {
fText = new Text(fDialog, SWT.SINGLE | SWT.BORDER);
fText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
fText.addModifyListener(new ModifyListener() {
@Override
public void modifyText(ModifyEvent e) {
validateInput();
}
});
}
String value = null;
try {
fRequest.getClass().getMethod("getDefaultValue", new Class<?>[0]); //$NON-NLS-1$
value = fRequest.getDefaultValue();
}
catch (SecurityException e) {
// do nothing
}
catch (NoSuchMethodException e) {
// pre Ant 1.7.0
}
fErrorMessageText = new Text(fDialog, SWT.READ_ONLY);
fErrorMessageText.setLayoutData(new GridData(GridData.GRAB_HORIZONTAL | GridData.HORIZONTAL_ALIGN_FILL));
fErrorMessageText.setBackground(display.getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
createButtonBar(fDialog, result);
if (value != null) {
if (fCombo != null) {
fCombo.select(fCombo.indexOf(value));
} else {
fText.setText(value);
fText.selectAll();
}
}
fDialog.pack();
}
protected void setErrorMessage(String errorMessage) {
fErrorMessageText.setText(errorMessage == null ? "" : errorMessage); //$NON-NLS-1$
fOkButton.setEnabled(errorMessage == null);
fErrorMessageText.getParent().update();
}
protected void validateInput() {
String errorMessage = null;
if (fRequest instanceof MultipleChoiceInputRequest) {
fRequest.setInput(fCombo.getText());
} else {
fRequest.setInput(fText.getText());
}
if (!fRequest.isInputValid()) {
if (fFirstValidation) {
errorMessage = ""; //$NON-NLS-1$
fFirstValidation = false;
} else {
errorMessage = RemoteAntMessages.getString("SWTInputHandler.3"); //$NON-NLS-1$
}
}
setErrorMessage(errorMessage);
}
protected Control createButtonBar(Composite parent, boolean[] result) {
Composite composite = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
layout.numColumns = 2;
layout.makeColumnsEqualWidth = true;
composite.setLayout(layout);
GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER);
composite.setLayoutData(data);
composite.setFont(parent.getFont());
createButtonsForButtonBar(composite, result);
return composite;
}
protected void createButtonsForButtonBar(Composite parent, final boolean[] result) {
fOkButton = new Button(parent, SWT.PUSH);
fOkButton.setText(RemoteAntMessages.getString("SWTInputHandler.4")); //$NON-NLS-1$
setButtonLayoutData(fOkButton);
Button cancel = new Button(parent, SWT.PUSH);
cancel.setText(RemoteAntMessages.getString("SWTInputHandler.5")); //$NON-NLS-1$
Listener listener = new Listener() {
@Override
public void handleEvent(Event event) {
result[0] = event.widget == fOkButton;
fDialog.close();
}
};
setButtonLayoutData(cancel);
fOkButton.addListener(SWT.Selection, listener);
fDialog.setDefaultButton(fOkButton);
cancel.addListener(SWT.Selection, listener);
// do this here because setting the text will set enablement on the ok button
if (fRequest instanceof MultipleChoiceInputRequest) {
fCombo.setFocus();
} else {
fText.setFocus();
}
}
private void setButtonLayoutData(Button button) {
GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
int widthHint = convertHorizontalDLUsToPixels(61); // from IDialogConstants.BUTTON_WIDTH
Point minSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
data.widthHint = Math.max(widthHint, minSize.x);
button.setLayoutData(data);
}
private int convertHorizontalDLUsToPixels(int dlus) {
// round to the nearest pixel
return (fFontMetrics.getAverageCharWidth() * dlus + 4 / 2) / 4;
}
protected void initializeDialogUnits(Control control) {
// Compute and store a font metric
GC gc = new GC(control);
gc.setFont(control.getFont());
fFontMetrics = gc.getFontMetrics();
gc.dispose();
}
}