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	/*
	* Copyright (c) 2003, 2008, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code 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
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	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;
	}
	}

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