Added method Document.getCounter. Interaction with using counters in …

…the Document not possible yet

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

@@ -58,4 +58,20 @@ public interface Document extends StructuralNode {
      * @return options defined in document.
      */
     Map<Object, Object> getOptions();
+
+    /**
+     * Gets the current counter with the given name and increases its value.
+     * @param name
+     * @return
+     */
+    int getCounter(String name);
+
+    /**
+     * Gets the current counter with the given name and increases its value.
+     * At the first invocation
+     * @param name
+     * @param initialValue
+     * @return
+     */
+    int getCounter(String name, int initialValue);
 }

asciidoctorj-core/src/main/java/org/asciidoctor/ast/impl/DocumentImpl.java

@@ -54,4 +54,14 @@ public String doctitle() {
         return getDoctitle();
     }
 
+    @Override
+    public int getCounter(String name) {
+        return getInt("counter", name);
+    }
+
+    @Override
+    public int getCounter(String name, int initialValue) {
+        return getInt("counter", name, initialValue);
+    }
+
 }

asciidoctorj-core/src/test/groovy/org/asciidoctor/extension/WhenAJavaExtensionUsesCounters.groovy

@@ -0,0 +1,182 @@
+package org.asciidoctor.extension
+
+import groovy.transform.CompileStatic
+import org.asciidoctor.Asciidoctor
+import org.asciidoctor.OptionsBuilder
+import org.asciidoctor.SafeMode
+import org.asciidoctor.ast.Block
+import org.asciidoctor.ast.Section
+import org.asciidoctor.ast.StructuralNode
+import org.jboss.arquillian.spock.ArquillianSputnik
+import org.jboss.arquillian.test.api.ArquillianResource
+import org.jsoup.Jsoup
+import org.jsoup.nodes.Document
+import org.jsoup.select.Elements
+import org.junit.runner.RunWith
+import spock.lang.Specification
+
+@SuppressWarnings('DuplicateNumberLiteral')
+@RunWith(ArquillianSputnik)
+class WhenAJavaExtensionUsesCounters extends Specification {
+
+    public static final String UTF8 = 'UTF-8'
+
+    public static final String PARAGRAPH = 'paragraph'
+
+    public static final String PARAGRAPH_SELECTOR = '.paragraph'
+
+    @ArquillianResource
+    private Asciidoctor asciidoctor
+
+
+    def 'using the counter macro should continue the counters set in macros but doesnt'() {
+        given:
+        String document = '''= Test document
+
+== Test section
+
+testmacro::countera[]
+
+testmacro::counterb[]
+
+testmacro::countera[]
+
+The attribute for countera: {counter:countera}
+
+The attribute for counterb: {counter:counterb}
+
+'''
+        when:
+        asciidoctor.javaExtensionRegistry().blockMacro(TestBlockMacroProcessor)
+        String result = asciidoctor.convert(document, OptionsBuilder.options().headerFooter(true).safe(SafeMode.SERVER))
+
+        then:
+        Document doc = Jsoup.parse(result, UTF8)
+        Elements paragraphs = doc.select(PARAGRAPH_SELECTOR)
+        paragraphs.get(0).text() == 'This is macro call 1 for countera'
+        paragraphs.get(1).text() == 'This is macro call 1 for counterb'
+        paragraphs.get(2).text() == 'This is macro call 2 for countera'
+
+        paragraphs.get(3).text() == 'The attribute for countera: 1'
+        paragraphs.get(4).text() == 'The attribute for counterb: 1'
+    }
+
+    def 'using a treeprocessor should continue the counters set in macros'() {
+        given:
+        String document = '''= Test document
+
+== Test section
+
+[.count]
+countera
+
+[.count]
+counterb
+
+The attribute for countera: {counter:countera}
+
+The attribute for counterb: {counter:counterb}
+
+'''
+        when:
+        asciidoctor.javaExtensionRegistry().treeprocessor(TestTreeProcessor)
+        String result = asciidoctor.convert(document, OptionsBuilder.options().headerFooter(true).safe(SafeMode.SERVER))
+
+        then:
+        Document doc = Jsoup.parse(result, UTF8)
+        Elements paragraphs = doc.select(PARAGRAPH_SELECTOR)
+        paragraphs.get(0).text() == 'Counter countera has value 1'
+        paragraphs.get(1).text() == 'Counter counterb has value 1'
+        paragraphs.get(2).text() == 'The attribute for countera: 2'
+        paragraphs.get(3).text() == 'The attribute for counterb: 2'
+    }
+
+    def 'an initial seed should be used'() {
+        given:
+        String document = '''= Test document
+
+== Test section
+
+testmacro::countera[]
+
+testmacro::counterb[]
+
+testmacro::countera[]
+
+'''
+        when:
+        asciidoctor.javaExtensionRegistry().blockMacro(TestBlockMacroWithInitialCounterProcessor)
+        String result = asciidoctor.convert(document, OptionsBuilder.options().headerFooter(true).safe(SafeMode.SERVER))
+
+        then:
+        Document doc = Jsoup.parse(result, UTF8)
+        Elements paragraphs = doc.select(PARAGRAPH_SELECTOR)
+        paragraphs.get(0).text() == 'This is macro call 42 for countera'
+        paragraphs.get(1).text() == 'This is macro call 42 for counterb'
+        paragraphs.get(2).text() == 'This is macro call 43 for countera'
+    }
+
+    @CompileStatic
+    @Name('testmacro')
+    @Contexts(Contexts.CONTEXT_PARAGRAPH)
+    @ContentModel(ContentModel.SIMPLE)
+    static class TestBlockMacroProcessor extends BlockMacroProcessor {
+
+        @Override
+        Object process(StructuralNode parent, String target, Map<String, Object> attributes) {
+
+            String text = "This is macro call ${parent.document.getCounter(target)} for ${target}"
+            // Have to do this to interact successfully with counters also used in the document
+            // String text = "This is macro call {counter:${target}} for ${target}"
+
+            createBlock(parent, PARAGRAPH, text)
+        }
+    }
+
+    @CompileStatic
+    @Name('testmacro')
+    @Contexts(Contexts.CONTEXT_PARAGRAPH)
+    @ContentModel(ContentModel.SIMPLE)
+    static class TestBlockMacroWithInitialCounterProcessor extends BlockMacroProcessor {
+
+        @Override
+        Object process(StructuralNode parent, String target, Map<String, Object> attributes) {
+
+            String text = "This is macro call ${parent.document.getCounter(target, 42)} for ${target}"
+
+            createBlock(parent, PARAGRAPH, text)
+        }
+    }
+
+    static class TestTreeProcessor extends Treeprocessor {
+
+        @Override
+        org.asciidoctor.ast.Document process(org.asciidoctor.ast.Document document) {
+
+            List<StructuralNode> newNodes = document.blocks.collect {
+                if (it instanceof Section) {
+                    processSection((Section) it)
+                } else {
+                    it
+                }
+            }
+            document.blocks.clear()
+            document.blocks.addAll(newNodes)
+
+            document
+        }
+
+        Section processSection(Section section) {
+            List<StructuralNode> newNodes = section.blocks.collect {
+                if (it instanceof Block && it.getRoles().contains('count')) {
+                    createBlock(section, PARAGRAPH, "Counter ${it.content} has value ${it.document.getCounter(it.source)}")
+                } else {
+                    it
+                }
+            }
+            section.blocks.clear()
+            section.blocks.addAll(newNodes)
+            section
+        }
+    }
+}