Fixes #497. Patch Asciidoctor::AbstractBlock#section? in abstract_blo…

asciidoctorj-core/build.gradle

@@ -27,6 +27,14 @@ def gemFiles = fileTree(jruby.gemInstallDir) {
 jrubyPrepareGems << {
   copy { // bundles the gems inside this artifact
     from gemFiles
+    eachFile {
+      // See https://github.com/asciidoctor/asciidoctorj/issues/497
+      if (it.path ==~ /gems\/asciidoctor-.+\/lib\/asciidoctor\/abstract_block.rb/) {
+        it.filter { line ->
+          line.replaceAll(/block.context == :section/, 'block.context.to_sym == :section')
+        }
+      }
+    }
     into sourceSets.main.output.resourcesDir
   }
 }

asciidoctorj-core/src/main/java/org/asciidoctor/ast/AbstractBlockImpl.java

@@ -1,15 +1,13 @@
 package org.asciidoctor.ast;
 
-import java.util.List;
-import java.util.Map;
-
-import org.asciidoctor.converter.ConverterProxy;
 import org.asciidoctor.internal.RubyHashUtil;
 import org.asciidoctor.internal.RubyUtils;
 import org.jruby.Ruby;
 import org.jruby.RubyArray;
 import org.jruby.RubyObject;
-import org.jruby.javasupport.JavaEmbedUtils;
+
+import java.util.List;
+import java.util.Map;
 
 public class AbstractBlockImpl extends AbstractNodeImpl implements AbstractBlock {
 
@@ -44,6 +42,10 @@ public String getStyle() {
         return delegate.getStyle();
     }
 
+    public String getCaption() {
+        return RubyUtils.invokeRubyMethod(delegate, "caption", new Object[0], String.class);
+    }
+
     @Override
     public List<AbstractBlock> blocks() {
         return getBlocks();

asciidoctorj-core/src/main/java/org/asciidoctor/ast/SectionImpl.java

@@ -1,7 +1,10 @@
 package org.asciidoctor.ast;
 
+import org.asciidoctor.internal.RubyUtils;
 import org.jruby.Ruby;
 
+import java.util.List;
+
 public class SectionImpl extends AbstractBlockImpl implements Section {
 
     private Section delegate;
@@ -36,4 +39,27 @@ public int numbered() {
         return this.delegate.number();
     }
 
+    public String sectnum() {
+        return RubyUtils.invokeRubyMethod(delegate, "sectnum", new Object[0], String.class);
+    }
+
+    public String sectnum(String delimiter) {
+        return RubyUtils.invokeRubyMethod(delegate, "sectnum", new Object[]{delimiter}, String.class);
+    }
+
+    public String sectnum(String delimiter, boolean append) {
+        return RubyUtils.invokeRubyMethod(delegate, "sectnum", new Object[]{delimiter, append}, String.class);
+    }
+
+    public List<Section> getSections() {
+        return RubyUtils.invokeRubyMethod(delegate, "sections", new Object[0], List.class);
+    }
+
+    public boolean isSections() {
+        return RubyUtils.invokeRubyMethod(delegate, "sections?", new Object[0], Boolean.class);
+    }
+
+    public String getCaptionedTitle() {
+        return RubyUtils.invokeRubyMethod(delegate, "captioned_title", new Object[0], String.class);
+    }
 }

asciidoctorj-core/src/main/java/org/asciidoctor/internal/RubyUtils.java

@@ -7,6 +7,7 @@
 import org.jruby.RubyObject;
 import org.jruby.RubySymbol;
 import org.jruby.internal.runtime.GlobalVariable.Scope;
+import org.jruby.java.proxies.RubyObjectHolderProxy;
 import org.jruby.javasupport.JavaClass;
 import org.jruby.javasupport.JavaEmbedUtils;
 import org.jruby.runtime.GlobalVariable;
@@ -41,4 +42,17 @@ public static final void setGlobalVariable(Ruby rubyRuntime, String variableName
         rubyRuntime.evalScriptlet(script);
     }
 
+    public static <T> T invokeRubyMethod(final Object target, final String methodName, final Object[] args, final Class<T> resultType) {
+        IRubyObject rubyObject = null;
+        if (target instanceof RubyObjectHolderProxy) {
+            rubyObject = RubyObjectHolderProxy.class.cast(target).__ruby_object();
+        } else if (target instanceof IRubyObject) {
+            rubyObject = (IRubyObject) target;
+        }
+        if (rubyObject != null) {
+            return (T) JavaEmbedUtils.invokeMethod(rubyObject.getRuntime(), rubyObject, methodName, args, resultType);
+        }
+        throw new IllegalArgumentException("Target is a " + target.getClass() + " instead of a Ruby object.");
+    }
+
 }

asciidoctorj-core/src/test/java/org/asciidoctor/extension/WhenJavaExtensionIsRegistered.java

@@ -22,6 +22,7 @@
 import java.util.Map;
 
 import org.asciidoctor.Asciidoctor;
+import org.asciidoctor.AttributesBuilder;
 import org.asciidoctor.Options;
 import org.asciidoctor.SafeMode;
 import org.asciidoctor.ast.DocumentRuby;
@@ -390,6 +391,24 @@ public void a_treeprocessor_should_be_executed_in_document() {
 
     }
 
+    /**
+     * See https://github.com/asciidoctor/asciidoctorj/issues/497.
+     */
+    @Test
+    public void when_using_a_tree_processor_a_toc_should_still_be_created() {
+
+        JavaExtensionRegistry javaExtensionRegistry = this.asciidoctor.javaExtensionRegistry();
+
+        javaExtensionRegistry.treeprocessor(TerminalCommandTreeprocessor.class);
+
+        String content = asciidoctor.renderFile(
+            classpath.getResource("sample-with-sections.ad"),
+            options().toFile(false)
+                .attributes(AttributesBuilder.attributes().tableOfContents(true))
+                .get());
+    }
+
+
     @Test
     public void a_treeprocessor_as_string_should_be_executed_in_document() {
 

asciidoctorj-core/src/test/resources/sample-with-sections.ad

@@ -0,0 +1,15 @@
+= Hello World
+
+Some text
+
+== Section A
+
+More text
+
+=== Subsection A1
+
+Subsections are also so important.
+
+== Section B
+
+And even more text