/*
* Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
*
*
*
*
*
*
*
*
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*/
package javax.swing.plaf.synth;
import javax.swing.*;
import javax.swing.plaf.FontUIResource;
import java.awt.Font;
import java.util.*;
import java.util.regex.*;
import sun.swing.plaf.synth.*;
import sun.swing.BakedArrayList;
/**
* Factory used for obtaining styles. Supports associating a style based on
* the name of the component as returned by <code>Component.getName()</code>,
* and the <code>Region</code> associated with the <code>JComponent</code>.
* Lookup is done using regular expressions.
*
* @author Scott Violet
*/
class DefaultSynthStyleFactory extends SynthStyleFactory {
/**
* Used to indicate the lookup should be done based on Component name.
*/
public static final int NAME = 0;
/**
* Used to indicate the lookup should be done based on region.
*/
public static final int REGION = 1;
/**
* List containing set of StyleAssociations used in determining matching
* styles.
*/
private List<StyleAssociation> _styles;
/**
* Used during lookup.
*/
private BakedArrayList _tmpList;
/**
* Maps from a List (BakedArrayList to be precise) to the merged style.
*/
private Map<BakedArrayList, SynthStyle> _resolvedStyles;
/**
* Used if there are no styles matching a widget.
*/
private SynthStyle _defaultStyle;
DefaultSynthStyleFactory() {
_tmpList = new BakedArrayList(5);
_styles = new ArrayList<StyleAssociation>();
_resolvedStyles = new HashMap<BakedArrayList, SynthStyle>();
}
public synchronized void addStyle(DefaultSynthStyle style,
String path, int type) throws PatternSyntaxException {
if (path == null) {
// Make an empty path match all.
path = ".*";
}
if (type == NAME) {
_styles.add(StyleAssociation.createStyleAssociation(
path, style, type));
}
else if (type == REGION) {
_styles.add(StyleAssociation.createStyleAssociation(
path.toLowerCase(), style, type));
}
}
/**
* Returns the style for the specified Component.
*
* @param c Component asking for
* @param id ID of the Component
*/
public synchronized SynthStyle getStyle(JComponent c, Region id) {
BakedArrayList matches = _tmpList;
matches.clear();
getMatchingStyles(matches, c, id);
if (matches.size() == 0) {
return getDefaultStyle();
}
// Use a cached Style if possible, otherwise create a new one.
matches.cacheHashCode();
SynthStyle style = getCachedStyle(matches);
if (style == null) {
style = mergeStyles(matches);
if (style != null) {
cacheStyle(matches, style);
}
}
return style;
}
/**
* Returns the style to use if there are no matching styles.
*/
private SynthStyle getDefaultStyle() {
if (_defaultStyle == null) {
_defaultStyle = new DefaultSynthStyle();
((DefaultSynthStyle)_defaultStyle).setFont(
new FontUIResource(Font.DIALOG, Font.PLAIN,12));
}
return _defaultStyle;
}
/**
* Fetches any styles that match the passed into arguments into
* <code>matches</code>.
*/
private void getMatchingStyles(List matches, JComponent c,
Region id) {
String idName = id.getLowerCaseName();
String cName = c.getName();
if (cName == null) {
cName = "";
}
for (int counter = _styles.size() - 1; counter >= 0; counter--){
StyleAssociation sa = _styles.get(counter);
String path;
if (sa.getID() == NAME) {
path = cName;
}
else {
path = idName;
}
if (sa.matches(path) && matches.indexOf(sa.getStyle()) == -1) {
matches.add(sa.getStyle());
}
}
}
/**
* Caches the specified style.
*/
private void cacheStyle(List styles, SynthStyle style) {
BakedArrayList cachedStyles = new BakedArrayList(styles);
_resolvedStyles.put(cachedStyles, style);
}
/**
* Returns the cached style from the passed in arguments.
*/
private SynthStyle getCachedStyle(List styles) {
if (styles.size() == 0) {
return null;
}
return _resolvedStyles.get(styles);
}
/**
* Creates a single Style from the passed in styles. The passed in List
* is reverse sorted, that is the most recently added style found to
* match will be first.
*/
private SynthStyle mergeStyles(List styles) {
int size = styles.size();
if (size == 0) {
return null;
}
else if (size == 1) {
return (SynthStyle)((DefaultSynthStyle)styles.get(0)).clone();
}
// NOTE: merging is done backwards as DefaultSynthStyleFactory reverses
// order, that is, the most specific style is first.
DefaultSynthStyle style = (DefaultSynthStyle)styles.get(size - 1);
style = (DefaultSynthStyle)style.clone();
for (int counter = size - 2; counter >= 0; counter--) {
style = ((DefaultSynthStyle)styles.get(counter)).addTo(style);
}
return style;
}
}