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/*
 *  Copyright (c) 2011, 2012, 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 com.sun.javafx.css;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import javafx.css.PseudoClass;
import javafx.scene.text.Font;

/**
 *
 */
public final class StyleCacheEntry {
    
    public StyleCacheEntry() {
    }
    
    public CalculatedValue get(String property) {

        CalculatedValue cv = null;
        if (calculatedValues != null && ! calculatedValues.isEmpty()) {
            cv = calculatedValues.get(property);
        }
        return cv;
    }

    public void put(String property, CalculatedValue calculatedValue) {

        if (calculatedValues == null) {
            this.calculatedValues = new HashMap<>(5);
        }

        calculatedValues.put(property, calculatedValue);
    }

    public final static class Key {

        private final Set[] pseudoClassStates;
        private final double fontSize;
    
        public Key(Set[] pseudoClassStates, Font font) {

            this.pseudoClassStates = new Set[pseudoClassStates.length];
            for (int n=0; n states = pseudoClassStates[i];
                if (states != null) {                
                    hash = 67 * (hash + states.hashCode());
                }
            }
            return hash;
        }

        @Override
        public boolean equals(Object obj) {

            if (obj == this) return true;

            if (obj == null || obj.getClass() != this.getClass()) return false;

            final Key other = (Key) obj;

            //
            // double == double is not reliable since a double is kind of
            // a fuzzy value. And Double.compare is too precise.
            // For javafx, most sizes are rounded to the nearest tenth
            // (see SizeUnits.round) so comparing  here to the nearest
            // millionth is more than adequate.
            //
            // We assume that both fsize values are > 0, which is a safe assumption
            // because Font doesn't allow sizes < 0.
            final double diff = fontSize - other.fontSize;
            if (Math.abs(diff) > 0.000001) {
                return false;
            }

            // either both must be null or both must be not-null
            if ((pseudoClassStates == null) ^ (other.pseudoClassStates == null)) {
                return false;
            }

            // if one is null, the other is too.
            if (pseudoClassStates == null) {
                return true;
            }

            if (pseudoClassStates.length != other.pseudoClassStates.length) {
                return false;
            }

            for (int i=0; i this_pcs = pseudoClassStates[i];
                final Set other_pcs = other.pseudoClassStates[i];

                // if one is null, the other must be too
                if (this_pcs == null ? other_pcs != null : !this_pcs.equals(other_pcs)) {
                    return false;
                }
            }

            return true;
        }

    }
        
//    private final Reference sharedCacheRef;
    private Map calculatedValues;
//    private CalculatedValue  font; // for use in converting font relative sizes
}




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