Add browseJavadoc, allow frames support

build.gradle

@@ -43,6 +43,27 @@ allprojects {
             }
         }
     }
+
+    tasks.withType(Javadoc) {
+        /*
+          Javadoc Fixes, part 3
+          Since JDK13 the javadoc html validator was changed, making it impossible to have javadocs
+          that are valid on both pre-13 and post-13 java versions.
+          The original workaround was suggested here: https://bugs.openjdk.java.net/browse/JDK-8223552
+          However, this workaround does not work for us since we are using aggregate-javadoc.
+          So, we are using a workaround for the workaround from:
+            original: https://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
+            archived: https://web.archive.org/web/20210117193942/https://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
+          which, in turn, references this: https://github.com/GPars/GPars/blob/7cddf7cf2fec1fd66ef800edccfc03315d078a2b/build.gradle#L209
+        */
+        options.addBooleanOption("Xdoclint:-html", JavaVersion.current().isJava11Compatible())
+
+        // Enable frames support if running on java 11
+        options.addBooleanOption("-frames", JavaVersion.current().isJava11())
+
+        // Include private and protected in the javadocs
+        options.memberLevel = JavadocMemberLevel.PRIVATE
+    }
 }
 
 subprojects {
@@ -216,27 +237,15 @@ tasks.test.finalizedBy rootTestReport, rootJacocoMergedReport, javadoc
 // Root build: also run aggregateJavadoc after javadoc to generate project-wide javadocs
 tasks.javadoc.finalizedBy aggregateJavadoc
 
-// Javadoc fixes (pt. 2, see above entry in subprojects)
+// Javadoc fixes (pt. 2, see above entries)
 aggregateJavadoc.options.encoding = "UTF-8"
 
-/*
-    Javadoc Fixes, part 3
-
-    Since JDK13 the javadoc html validator was changed, making it impossible to have javadocs
-    that are valid on both pre-13 and post-13 java versions.
-    The original workaround was suggested here: https://bugs.openjdk.java.net/browse/JDK-8223552
-    However, this workaround does not work for us since we are using aggregate-javadoc.
-    So, we are using a workaround for the workaround from:
-        original: https://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
-        archived: https://web.archive.org/web/20210117193942/https://blog.joda.org/2014/02/turning-off-doclint-in-jdk-8-javadoc.html
-    which, in turn, references this: https://github.com/GPars/GPars/blob/7cddf7cf2fec1fd66ef800edccfc03315d078a2b/build.gradle#L209
- */
-if (JavaVersion.current().isJava8Compatible()) {
-    allprojects {
-        tasks.withType(Javadoc) {
-            // options.addStringOption("Xdoclint:-html", "-quiet")
-            options.addBooleanOption("Xdoclint:-html", true)
-        }
+task browseJavadoc {
+    dependsOn javadoc
+    description "Browse javadoc"
+    group = "documentation"
+    doLast {
+        java.awt.Desktop.desktop.browse new URI(("file:///" << System.getProperty("user.dir").replace('\\','/') << "/build/docs/javadoc/index.html").toString())
     }
 }