com.sun.javafx.css.StyleMap Maven / Gradle / Ivy
/*
* Copyright (c) 2010, 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.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javafx.util.Pair;
/**
* A map of property name to the cascading styles that match a node.
*/
public final class StyleMap {
public static final StyleMap EMPTY_MAP =
new StyleMap(-1, Collections.emptyList());
/** Only StyleManager creates StyleMap */
StyleMap(int id, List selectors) {
this.id = id;
this.selectors = selectors;
}
public int getId() {
return id;
}
public boolean isEmpty() {
if (selectors != null) return selectors.isEmpty();
else if (cascadingStyles != null) return cascadingStyles.isEmpty();
else return true;
}
public Map> getCascadingStyles() {
if (cascadingStyles == null) {
if (selectors == null || selectors.isEmpty()) {
cascadingStyles = Collections.emptyMap();
return cascadingStyles;
}
//
// Creating the map is a three step process. First, create
// a list of CascadingStyles. Second, sort the CascadingStyles.
// And, finally, loop through the CascadingStyles to put them
// into the Map by property name.
//
List cascadingStyleList = new ArrayList<>();
int ordinal = 0;
for (int i=0, iMax=selectors.size(); i(nCascadingStyles);
CascadingStyle cascadingStyle = cascadingStyleList.get(0);
String property = cascadingStyle.getProperty();
for (int fromIndex=0; fromIndex value = cascadingStyles.get(property);
if (value == null) {
int toIndex = fromIndex;
final String currentProperty = property;
while (++toIndex < nCascadingStyles) {
cascadingStyle = cascadingStyleList.get(toIndex);
property = cascadingStyle.getProperty();
if (property.equals(currentProperty) == false) break;
}
cascadingStyles.put(currentProperty, cascadingStyleList.subList(fromIndex, toIndex));
fromIndex = toIndex;
} else {
// logic is broken!
assert(false);
}
}
selectors.clear();
selectors = null;
}
return cascadingStyles;
}
private static final Comparator cascadingStyleComparator =
new Comparator() {
@Override public int compare(CascadingStyle o1, CascadingStyle o2) {
//
// primary sort is on property. If the property names are the same,
// then go through the cascade logic. Otherwise, sort by property
// name since the cascade doesn't matter for dissimilar properties.
//
// What we want to end up with is a list where all the same properties
// are together in the list.
//
String thisProperty = o1.getProperty();
String otherProperty = o2.getProperty();
int c = thisProperty.compareTo(otherProperty);
if (c != 0) return c;
return o1.compareTo(o2);
}
};
private final int id; // unique per container
private List selectors;
private Map> cascadingStyles;
}