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/********************************************************************************
* Copyright (c) 2005, 2006 IBM Corporation. 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
*
* Initial Contributors:
* The following IBM employees contributed to the Remote System Explorer
* component that contains this file: David McKnight, Kushal Munir,
* Michael Berger, David Dykstal, Phil Coulthard, Don Yantzi, Eric Simpson,
* Emily Bruner, Mazen Faraj, Adrian Storisteanu, Li Ding, and Kent Hawley.
*
* Contributors:
* {Name} (company) - description of contribution.
********************************************************************************/
package org.eclipse.rse.shells.ui.view;
import java.io.UnsupportedEncodingException;
import java.util.Collections;
import java.util.List;
import org.eclipse.rse.shells.ui.ShellResources;
import org.eclipse.rse.ui.SystemBaseForm;
import org.eclipse.rse.ui.messages.ISystemMessageLine;
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.Font;
import org.eclipse.swt.layout.GridData;
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.Shell;
public class EncodingForm extends SystemBaseForm
{
// State for encoding group
private String _encoding;
private String _defaultEncoding;
private Button _defaultEncodingButton;
private Button _otherEncodingButton;
private Combo _encodingCombo;
public EncodingForm(Shell shell, ISystemMessageLine line)
{
super(shell, line);
_defaultEncoding = ShellResources.RESID_SHELL_PROPERTYPAGE_DEFAULT_ENCODING;
}
/* (non-Javadoc)
* @see org.eclipse.rse.core.ui.SystemBaseForm#createContents(org.eclipse.swt.widgets.Composite)
*/
public Control createContents(Composite group)
{
SelectionAdapter buttonListener = new SelectionAdapter()
{
public void widgetSelected(SelectionEvent e) {
updateEncodingState(_defaultEncodingButton.getSelection());
updateValidState();
}
};
_defaultEncodingButton = new Button(group, SWT.RADIO);
_defaultEncodingButton.setText(ShellResources.RESID_SHELL_PROPERTYPAGE_HOST_ENCODING);
GridData data = new GridData();
Font font = group.getFont();
data.horizontalSpan = 2;
_defaultEncodingButton.setLayoutData(data);
_defaultEncodingButton.addSelectionListener(buttonListener);
_defaultEncodingButton.setFont(font);
_otherEncodingButton = new Button(group, SWT.RADIO);
_otherEncodingButton.setText(ShellResources.RESID_SHELL_PROPERTYPAGE_OTHER_ENCODING);
_otherEncodingButton.addSelectionListener(buttonListener);
_otherEncodingButton.setFont(font);
_encodingCombo = new Combo(group, SWT.NONE);
data = new GridData();
_encodingCombo.setFont(font);
_encodingCombo.setLayoutData(data);
_encodingCombo.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent e) {
updateValidState();
}
});
return _encodingCombo;
}
public void initialize(List defaults, String encoding)
{
_encoding = encoding;
boolean isDefault = _encoding == null || _encoding.length() == 0 || encoding.equals(_defaultEncoding);
if (!isDefault && !defaults.contains(_encoding))
{
defaults.add(_encoding);
}
Collections.sort(defaults);
for (int i = 0; i < defaults.size(); ++i) {
_encodingCombo.add((String) defaults.get(i));
}
_encodingCombo.setText(isDefault ? _defaultEncoding : _encoding);
updateEncodingState(isDefault);
}
public Control getDefaultControl()
{
return _encodingCombo;
}
public boolean usingDefault()
{
return _defaultEncodingButton.getSelection();
}
public String getEncoding()
{
if (usingDefault())
{
return ""; //$NON-NLS-1$
}
return _encodingCombo.getText();
}
protected void updateValidState()
{
if (!isEncodingValid())
{
getMessageLine().setErrorMessage(ShellResources.RESID_UNSUPPORTED_ENCODING);
}
else
{
getMessageLine().clearErrorMessage();
}
}
private boolean isEncodingValid()
{
return _defaultEncodingButton.getSelection()
|| isValidEncoding(_encodingCombo.getText());
}
private boolean isValidEncoding(String enc)
{
try {
new String(new byte[0], enc);
return true;
} catch (UnsupportedEncodingException e) {
return false;
}
}
private void updateEncodingState(boolean useDefault)
{
_defaultEncodingButton.setSelection(useDefault);
_otherEncodingButton.setSelection(!useDefault);
_encodingCombo.setEnabled(!useDefault);
updateValidState();
}
}
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