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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. and others. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License 2.0 which accompanies this distribution, and is
* available at https://www.eclipse.org/legal/epl-2.0/
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.controls.validator;
import org.eclipse.core.runtime.Assert;
import org.eclipse.swt.events.VerifyEvent;
/**
* Verify listener for text widgets to receive hex values.
*/
public class HexVerifyListener extends RegexVerifyListener {
// arguments (binary coded)
public static final int ATTR_TO_UPPER_CASE = 1;
public static final int ATTR_ALLOW_DECIMAL = 2;
/**
* Enables negative decimal numbers. Has effect on if {@link #ATTR_ALLOW_DECIMAL}
* is set as well.
*/
public static final int ATTR_ALLOW_NEGATIVE_DECIMAL = 4;
/**
* Enables negative hexadecimal numbers.
*/
public static final int ATTR_ALLOW_NEGATIVE_HEX = 8;
// next attribute should start with 2^4
// regular expressions
protected static final String HEX_REGEX = "@NEGATIVE@(0((x|X)[0-9a-fA-F]{0,@BYTES@})?)?"; //$NON-NLS-1$
protected static final String NUMBER_REGEX = "@NEGATIVE@([0-9]*)"; //$NON-NLS-1$
/**
* Constructor
* @param bytes The number of bytes (hex digits) allowed.
*/
public HexVerifyListener(int attributes, int bytes) {
super(attributes, getRegEx(attributes, bytes));
}
/*
* Static method to generate regular expression for constructor super call.
*/
private static String getRegEx(int attributes, int bytes) {
return (isAttribute(ATTR_ALLOW_DECIMAL, attributes)
? NUMBER_REGEX.replaceAll("@NEGATIVE@", isAttribute(ATTR_ALLOW_NEGATIVE_DECIMAL, attributes) ? "-?" : "") + "|" //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
: "") + HEX_REGEX.replaceAll("@BYTES@", "" + bytes) //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
.replaceAll("@NEGATIVE@", isAttribute(ATTR_ALLOW_NEGATIVE_HEX, attributes) ? "-?" : ""); //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
}
/**
* Adjust the value for maximum byte allowed.
*
* @param maxBytes The maximum number of bytes. Must be non-negative.
*/
public void setBounds(int maxBytes) {
Assert.isTrue(maxBytes >= 0);
setRegularExpression(getRegEx(getAttributes(), maxBytes));
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.controls.validator.RegexVerifyListener#verifyText(org.eclipse.swt.events.VerifyEvent)
*/
@Override
public void verifyText(VerifyEvent e) {
super.verifyText(e);
if (e.doit && isAttribute(ATTR_TO_UPPER_CASE)) {
e.text = e.text.toUpperCase().replace('X', 'x');
}
}
}
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