mirror of
https://github.com/autc04/Retro68.git
synced 2024-11-28 21:49:33 +00:00
357 lines
11 KiB
Java
357 lines
11 KiB
Java
/* InternationalFormatter.java --
|
|
Copyright (C) 2005, 2006 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package javax.swing.text;
|
|
|
|
import java.text.AttributedCharacterIterator;
|
|
import java.text.Format;
|
|
import java.text.ParseException;
|
|
import java.util.Iterator;
|
|
import java.util.Map;
|
|
import java.util.Set;
|
|
|
|
import javax.swing.Action;
|
|
import javax.swing.JFormattedTextField;
|
|
|
|
/**
|
|
* This extends {@link DefaultFormatter} so that the value to string
|
|
* conversion is done via a {@link Format} object. This allows
|
|
* various additional formats to be handled by JFormattedField.
|
|
*
|
|
* @author Roman Kennke (roman@kennke.org)
|
|
*/
|
|
public class InternationalFormatter
|
|
extends DefaultFormatter
|
|
{
|
|
/** The serialization UID (compatible with JDK1.5). */
|
|
private static final long serialVersionUID = 2436068675711756856L;
|
|
|
|
/** The format that handles value to string conversion. */
|
|
Format format;
|
|
|
|
/** The minimal permissable value. */
|
|
Comparable minimum;
|
|
|
|
/** The maximal permissable value. */
|
|
Comparable maximum;
|
|
|
|
/**
|
|
* Creates a new InternationalFormatter with no Format specified.
|
|
*/
|
|
public InternationalFormatter()
|
|
{
|
|
super();
|
|
minimum = null;
|
|
maximum = null;
|
|
format = null;
|
|
setCommitsOnValidEdit(false);
|
|
setOverwriteMode(false);
|
|
}
|
|
|
|
/**
|
|
* Creates a new InternationalFormatter that uses the specified
|
|
* Format object for value to string conversion.
|
|
*
|
|
* @param format the Format object to use for value to string conversion
|
|
*/
|
|
public InternationalFormatter(Format format)
|
|
{
|
|
this();
|
|
setFormat(format);
|
|
}
|
|
|
|
/**
|
|
* Sets the Format object that is used to convert values to strings.
|
|
*
|
|
* @param format the Format to use for value to string conversion
|
|
*
|
|
* @see Format
|
|
*/
|
|
public void setFormat(Format format)
|
|
{
|
|
this.format = format;
|
|
}
|
|
|
|
/**
|
|
* Returns the currently used Format object that is used to format
|
|
* the JFormattedField.
|
|
*
|
|
* @return the current Format
|
|
*/
|
|
public Format getFormat()
|
|
{
|
|
return format;
|
|
}
|
|
|
|
/**
|
|
* Sets the minimum value that is allowed by this Formatter. The minimum
|
|
* value is given as an object that implements the {@link Comparable}
|
|
* interface.
|
|
*
|
|
* If <code>minValue</code> is null, then the Formatter has no restrictions
|
|
* at the lower end.
|
|
*
|
|
* If value class is not yet specified and <code>minValue</code> is not
|
|
* null, then <code>valueClass</code> is set to the class of the minimum
|
|
* value.
|
|
*
|
|
* @param minValue the minimum permissable value
|
|
*
|
|
* @see Comparable
|
|
*/
|
|
public void setMinimum(Comparable minValue)
|
|
{
|
|
minimum = minValue;
|
|
if (valueClass == null && minValue != null)
|
|
valueClass = minValue.getClass();
|
|
}
|
|
|
|
/**
|
|
* Returns the minimal value that is allowed by this Formatter.
|
|
*
|
|
* A <code>null</code> value means that there is no restriction.
|
|
*
|
|
* @return the minimal value that is allowed by this Formatter or
|
|
* <code>null</code> if there is no restriction
|
|
*/
|
|
public Comparable getMinimum()
|
|
{
|
|
return minimum;
|
|
}
|
|
|
|
/**
|
|
* Sets the maximum value that is allowed by this Formatter. The maximum
|
|
* value is given as an object that implements the {@link Comparable}
|
|
* interface.
|
|
*
|
|
* If <code>maxValue</code> is null, then the Formatter has no restrictions
|
|
* at the upper end.
|
|
*
|
|
* If value class is not yet specified and <code>maxValue</code> is not
|
|
* null, then <code>valueClass</code> is set to the class of the maximum
|
|
* value.
|
|
*
|
|
* @param maxValue the maximum permissable value
|
|
*
|
|
* @see Comparable
|
|
*/
|
|
public void setMaximum(Comparable maxValue)
|
|
{
|
|
maximum = maxValue;
|
|
if (valueClass == null && maxValue != null)
|
|
valueClass = maxValue.getClass();
|
|
}
|
|
|
|
/**
|
|
* Returns the maximal value that is allowed by this Formatter.
|
|
*
|
|
* A <code>null</code> value means that there is no restriction.
|
|
*
|
|
* @return the maximal value that is allowed by this Formatter or
|
|
* <code>null</code> if there is no restriction
|
|
*/
|
|
public Comparable getMaximum()
|
|
{
|
|
return maximum;
|
|
}
|
|
|
|
/**
|
|
* Installs the formatter on the specified {@link JFormattedTextField}.
|
|
*
|
|
* This method does the following things:
|
|
* <ul>
|
|
* <li>Display the value of #valueToString in the
|
|
* <code>JFormattedTextField</code></li>
|
|
* <li>Install the Actions from #getActions on the <code>JTextField</code>
|
|
* </li>
|
|
* <li>Install the DocumentFilter returned by #getDocumentFilter</li>
|
|
* <li>Install the NavigationFilter returned by #getNavigationFilter</li>
|
|
* </ul>
|
|
*
|
|
* This method is typically not overridden by subclasses. Instead override
|
|
* one of the mentioned methods in order to customize behaviour.
|
|
*
|
|
* @param ftf the {@link JFormattedTextField} in which this formatter
|
|
* is installed
|
|
*/
|
|
public void install(JFormattedTextField ftf)
|
|
{
|
|
super.install(ftf);
|
|
}
|
|
|
|
/**
|
|
* Converts a value object into a String. This is done by invoking
|
|
* {@link Format#format(Object)} on the specified <code>Format</code> object.
|
|
* If no format is set, then {@link DefaultFormatter#valueToString(Object)}
|
|
* is called as a fallback.
|
|
*
|
|
* @param value the value to be converted
|
|
*
|
|
* @return the string representation of the value
|
|
*
|
|
* @throws ParseException if the value cannot be converted
|
|
*/
|
|
public String valueToString(Object value)
|
|
throws ParseException
|
|
{
|
|
if (value == null)
|
|
return "";
|
|
if (format != null)
|
|
return format.format(value);
|
|
else
|
|
return super.valueToString(value);
|
|
}
|
|
|
|
/**
|
|
* Converts a String (from the JFormattedTextField input) to a value.
|
|
* This is achieved by invoking {@link Format#parseObject(String)} on
|
|
* the specified <code>Format</code> object.
|
|
*
|
|
* This implementation differs slightly from {@link DefaultFormatter},
|
|
* it does:
|
|
* <ol>
|
|
* <li>Convert the string to an <code>Object</code> using the
|
|
* <code>Formatter</code>.</li>
|
|
* <li>If a <code>valueClass</code> has been set, this object is passed to
|
|
* {@link DefaultFormatter#stringToValue(String)} so that the value
|
|
* has the correct type. This may or may not work correctly, depending on
|
|
* the implementation of toString() in the value class and if the class
|
|
* implements a constructor that takes one String as argument.</li>
|
|
* <li>If no {@link ParseException} has been thrown so far, we check if the
|
|
* value exceeds either <code>minimum</code> or <code>maximum</code> if
|
|
* one of those has been specified and throw a <code>ParseException</code>
|
|
* if it does.</li>
|
|
* <li>Return the value.</li>
|
|
* </ol>
|
|
*
|
|
* If no format has been specified, then
|
|
* {@link DefaultFormatter#stringToValue(String)} is invoked as fallback.
|
|
*
|
|
* @param string the string to convert
|
|
*
|
|
* @return the value for the string
|
|
*
|
|
* @throws ParseException if the string cannot be converted into
|
|
* a value object (e.g. invalid input)
|
|
*/
|
|
public Object stringToValue(String string)
|
|
throws ParseException
|
|
{
|
|
if (format != null)
|
|
{
|
|
Object o = format.parseObject(string);
|
|
|
|
// If a value class has been set, call super in order to get
|
|
// the class right. That is what the JDK API docs suggest, so we do
|
|
// it that way.
|
|
if (valueClass != null)
|
|
o = super.stringToValue(o.toString());
|
|
|
|
// Check for minimum and maximum bounds
|
|
if (minimum != null && minimum.compareTo(o) > 0)
|
|
throw new ParseException("The value may not be less than the"
|
|
+ " specified minimum", 0);
|
|
if (maximum != null && maximum.compareTo(o) < 0)
|
|
throw new ParseException("The value may not be greater than the"
|
|
+ " specified maximum", 0);
|
|
return o;
|
|
}
|
|
else
|
|
return super.stringToValue(string);
|
|
}
|
|
|
|
/**
|
|
* Returns the {@link Format.Field} constants that are associated with
|
|
* the specified position in the text.
|
|
*
|
|
* If <code>offset</code> is not a valid location in the input field,
|
|
* an empty array of fields is returned.
|
|
*
|
|
* @param offset the position in the text from which we want to fetch
|
|
* the fields constants
|
|
*
|
|
* @return the field values associated with the specified position in
|
|
* the text
|
|
*/
|
|
public Format.Field[] getFields(int offset)
|
|
{
|
|
// TODO: don't know if this is correct
|
|
AttributedCharacterIterator aci = format.formatToCharacterIterator
|
|
(getFormattedTextField().getValue());
|
|
aci.setIndex(offset);
|
|
Map atts = aci.getAttributes();
|
|
Set keys = atts.keySet();
|
|
Format.Field[] fields = new Format.Field[keys.size()];
|
|
int index = 0;
|
|
for (Iterator i = keys.iterator(); i.hasNext(); index++)
|
|
fields[index] = (Format.Field) i.next();
|
|
return fields;
|
|
}
|
|
|
|
/**
|
|
* This creates and returns a clone of this Formatter.
|
|
*
|
|
* @return a clone of this formatter
|
|
*
|
|
* @throws CloneNotSupportedException not thrown here, since cloning is
|
|
* supported
|
|
*/
|
|
public Object clone()
|
|
throws CloneNotSupportedException
|
|
{
|
|
// TODO: it has to be considered, if we should return a deep or shallow
|
|
// clone here. for now we return a shallow clone
|
|
Object clone = super.clone();
|
|
return clone;
|
|
}
|
|
|
|
/**
|
|
* Returns the Actions that are supported by this Formatter.
|
|
*
|
|
* @specnote the JDK API docs say here: <cite>If
|
|
* <code>getSupportsIncrement</code> returns true, this returns two
|
|
* Actions suitable for incrementing/decrementing the value.</cite>
|
|
* The questsion is, which method <code>getSupportsIncrement</code>?
|
|
* There is no such method in the whole API! So we just call
|
|
* super.getActions here.
|
|
*/
|
|
protected Action[] getActions()
|
|
{
|
|
return super.getActions();
|
|
}
|
|
}
|