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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package com.sun.javafx.css;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javafx.css.Declaration;
import javafx.css.Match;
import javafx.css.Rule;
import javafx.css.Selector;


A map of property name to the cascading styles that match a node.
/** * 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.<Selector>emptyList());
Only StyleManager creates StyleMap
/** Only StyleManager creates StyleMap */
public StyleMap(int id, List<Selector> 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<String, List<CascadingStyle>> 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<CascadingStyle> cascadingStyleList = new ArrayList<>(); int ordinal = 0; for (int i=0, iMax=selectors.size(); i<iMax; i++) { final Selector selector = selectors.get(i); final Match match = selector.createMatch(); final Rule rule = selector.getRule(); for (int d = 0, dmax = rule.getDeclarations().size(); d < dmax; d++) { final Declaration decl = rule.getDeclarations().get(d); // ordinal increments at declaration level since // there may be more than one declaration for the // same attribute within a selector or within a stylesheet final CascadingStyle s = new CascadingStyle(decl, match, ordinal++); cascadingStyleList.add(s); } } if (cascadingStyleList.isEmpty()) { cascadingStyles = Collections.emptyMap(); return cascadingStyles; } // apply the cascade. CascadingStyle's primary sort key is the // property name, so the same properties should be in sequence. Collections.sort(cascadingStyleList, cascadingStyleComparator); // there may be more entries in this HashMap than we need if there // is more than one CascadingStyle per property. But this is // still better than final int nCascadingStyles = cascadingStyleList.size(); cascadingStyles = new HashMap<>(nCascadingStyles); CascadingStyle cascadingStyle = cascadingStyleList.get(0); String property = cascadingStyle.getProperty(); for (int fromIndex=0; fromIndex<nCascadingStyles; /*increment is in code*/) { List<CascadingStyle> 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<CascadingStyle> cascadingStyleComparator = (o1, 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<Selector> selectors; private Map<String, List<CascadingStyle>> cascadingStyles; }