StyleElement implements no longer the Comparable interface. For our special needs we now using the static method compareToByImportanceAndSpecificity(StyleElement, StyleElement).

rbri · rbri · commit 7736d755c0e5 · 2025-02-10T13:20:38.000+01:00
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
@@ -8,6 +8,10 @@
 
     <body>
         <release version="4.10.0" date="February xx, 2025" description="Chrome/Edge 132, Firefox 135, Javascript Errors, Bugfixes">
+            <action type="update" dev="RhinoTeam">
+                StyleElement implements no longer the Comparable interface. For our special needs we now using the
+                static method compareToByImportanceAndSpecificity(StyleElement, StyleElement).
+            </action>
             <action type="update" dev="RhinoTeam">
                 core-js: load more classes lazily.
             </action>
diff --git a/src/main/java/org/htmlunit/css/AbstractCssStyleDeclaration.java b/src/main/java/org/htmlunit/css/AbstractCssStyleDeclaration.java
@@ -137,7 +137,7 @@ public String getStyleAttribute(final Definition definition1, final Definition d
             return element1.getValue();
         }
         if (element1 != null) {
-            if (element1.compareTo(element2) > 0) {
+            if (StyleElement.compareToByImportanceAndSpecificity(element1, element2) > 0) {
                 return element1.getValue();
             }
         }
diff --git a/src/main/java/org/htmlunit/css/StyleElement.java b/src/main/java/org/htmlunit/css/StyleElement.java
@@ -35,7 +35,7 @@
  * @author Ronald Brill
  * @author Frank Danek
  */
-public class StyleElement implements Comparable<StyleElement>, Serializable {
+public class StyleElement implements Serializable {
     /** CSS important property constant. */
     public static final String PRIORITY_IMPORTANT = "important";
 
@@ -133,28 +133,41 @@ public String toString() {
     }
 
     /**
-     * {@inheritDoc}
+     * This takes only the importance, the specificity and the index into account.
+     * The name and value properties are ignored.
+     *
+     * @param first the {@link StyleElement} to compare
+     * @param second the {@link StyleElement} to compare with
+     * @return a negative integer, zero, or a positive integer as this object
+     *         is less than, equal to, or greater than the specified object.
      */
-    @Override
-    public int compareTo(final StyleElement e) {
-        if (e == null) {
+    public static int compareToByImportanceAndSpecificity(final StyleElement first, final StyleElement second) {
+        if (first == null) {
+            return second == null ? 0 : -1;
+        }
+
+        if (second == null) {
             return 1;
         }
 
-        if (isImportant()) {
-            if (!e.isImportant()) {
+        if (first == second) {
+            return 0;
+        }
+
+        if (first.isImportant()) {
+            if (!second.isImportant()) {
                 return 1;
             }
         }
         else {
-            if (e.isImportant()) {
+            if (second.isImportant()) {
                 return -1;
             }
         }
 
-        final int comp = getSpecificity().compareTo(e.getSpecificity());
+        final int comp = first.getSpecificity().compareTo(second.getSpecificity());
         if (comp == 0) {
-            return Long.compare(getIndex(), e.getIndex());
+            return Long.compare(first.getIndex(), second.getIndex());
         }
         return comp;
     }
diff --git a/src/main/java/org/htmlunit/html/DomElement.java b/src/main/java/org/htmlunit/html/DomElement.java
@@ -25,6 +25,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.Iterator;
 import java.util.LinkedHashMap;
 import java.util.List;
@@ -110,6 +111,13 @@ public class DomElement extends DomNamespaceNode implements Element {
     private String styleString_;
     private LinkedHashMap<String, StyleElement> styleMap_;
 
+    private static final Comparator<StyleElement> STYLE_ELEMENT_COMPARATOR = new Comparator<StyleElement>() {
+        @Override
+        public int compare(final StyleElement first, final StyleElement second) {
+            return StyleElement.compareToByImportanceAndSpecificity(first, second);
+        }
+    };
+
     /**
      * Whether the Mouse is currently over this element or not.
      */
@@ -604,7 +612,7 @@ public void writeStyleToElement(final Map<String, StyleElement> styleMap) {
 
         final StringBuilder builder = new StringBuilder();
         final List<StyleElement> styleElements = new ArrayList<>(styleMap.values());
-        Collections.sort(styleElements);
+        Collections.sort(styleElements, STYLE_ELEMENT_COMPARATOR);
         for (final StyleElement e : styleElements) {
             if (builder.length() != 0) {
                 builder.append(' ');
@@ -790,10 +798,12 @@ public DomElement getLastElementChild() {
      * Returns the current number of element nodes that are children of this element.
      * @return the current number of element nodes that are children of this element.
      */
-    @SuppressWarnings("PMD.UnusedLocalVariable")
     public int getChildElementCount() {
         int counter = 0;
-        for (final DomElement elem : getChildElements()) {
+
+        final Iterator<DomElement> iterator = getChildElements().iterator();
+        while (iterator.hasNext()) {
+            iterator.next();
             counter++;
         }
         return counter;

Original file line number	Diff line number	Diff line change
`@@ -137,7 +137,7 @@ public String getStyleAttribute(final Definition definition1, final Definition d`
`137`	`137`	`return element1.getValue();`
`138`	`138`	`}`
`139`	`139`	`if (element1 != null) {`
`140`		`- if (element1.compareTo(element2) > 0) {`
	`140`	`+ if (StyleElement.compareToByImportanceAndSpecificity(element1, element2) > 0) {`
`141`	`141`	`return element1.getValue();`
`142`	`142`	`}`
`143`	`143`	`}`