Add copy button for configuration property

Author: michalvavrik

devtools/config-doc-maven-plugin/src/main/java/io/quarkus/maven/config/doc/GenerateConfigDocMojo.java

@@ -40,6 +40,7 @@
 import io.quarkus.maven.config.doc.generator.GenerationReport;
 import io.quarkus.maven.config.doc.generator.GenerationReport.GenerationViolation;
 import io.quarkus.qute.Engine;
+import io.quarkus.qute.EngineBuilder;
 import io.quarkus.qute.ReflectionValueResolver;
 import io.quarkus.qute.UserTagSectionHelper;
 import io.quarkus.qute.ValueResolver;
@@ -296,7 +297,7 @@ public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) th
     }
 
     private static Engine initializeQuteEngine(Formatter formatter, Format format, String theme) {
-        Engine engine = Engine.builder()
+        EngineBuilder engineBuilder = Engine.builder()
                 .addDefaults()
                 .addSectionHelper(new UserTagSectionHelper.Factory("configProperty", "configProperty"))
                 .addSectionHelper(new UserTagSectionHelper.Factory("configSection", "configSection"))
@@ -402,9 +403,13 @@ private static Engine initializeQuteEngine(Formatter formatter, Format format, S
                         .applyToName("formatName")
                         .applyToNoParameters()
                         .resolveSync(ctx -> formatter.formatName((Extension) ctx.getBase()))
-                        .build())
-                .build();
+                        .build());
+
+        if (format == Format.asciidoc) {
+            engineBuilder.addSectionHelper(new UserTagSectionHelper.Factory("propertyCopyButton", "propertyCopyButton"));
+        }
 
+        Engine engine = engineBuilder.build();
         engine.putTemplate("configReference",
                 engine.parse(getTemplate("templates", format, theme, "configReference", false)));
         engine.putTemplate("allConfig",
@@ -420,6 +425,11 @@ private static Engine initializeQuteEngine(Formatter formatter, Format format, S
         engine.putTemplate("memorySizeNote",
                 engine.parse(getTemplate("templates", format, theme, "memorySizeNote", true)));
 
+        if (format == Format.asciidoc) {
+            engine.putTemplate("propertyCopyButton",
+                    engine.parse(getTemplate("templates", format, theme, "propertyCopyButton", true)));
+        }
+
         return engine;
     }
 

devtools/config-doc-maven-plugin/src/main/resources/templates/asciidoc/default/tags/configProperty.qute.adoc

@@ -1,7 +1,7 @@
-a|{#if configProperty.phase.fixedAtBuildTime}icon:lock[title=Fixed at build time]{/if} [[{configProperty.toAnchor(extension, additionalAnchorPrefix)}]] [.property-path]##link:#{configProperty.toAnchor(extension, additionalAnchorPrefix)}[`{configProperty.path.property}`]##
+a|{#if configProperty.phase.fixedAtBuildTime}icon:lock[title=Fixed at build time]{/if} [[{configProperty.toAnchor(extension, additionalAnchorPrefix)}]] [.property-path]##link:#{configProperty.toAnchor(extension, additionalAnchorPrefix)}[`{configProperty.path.property}`]## {#propertyCopyButton configProperty.path.property /}
 {#for additionalPath in configProperty.additionalPaths}
 
-`{additionalPath.property}`
+`{additionalPath.property}` {#propertyCopyButton additionalPath.property /}
 {/for}
 
 [.description]

devtools/config-doc-maven-plugin/src/main/resources/templates/asciidoc/default/tags/propertyCopyButton.qute.adoc

@@ -0,0 +1 @@
+config_property_copy_button:+++{it}+++[]

docs/pom.xml

@@ -3442,6 +3442,11 @@
                                     <className>io.quarkus.docs.generation.TooltipInlineMacroProcessor</className>
                                     <blockName>tooltip</blockName>
                                 </extension>
+                                <extension>
+                                    <!--  Register custom inline macro  -->
+                                    <className>io.quarkus.docs.generation.PropertyCopyButtonInlineMacroProcessor</className>
+                                    <blockName>config_property_copy_button</blockName>
+                                </extension>
                             </extensions>
                         </configuration>
                     </execution>

docs/src/main/java/io/quarkus/docs/generation/PropertyCopyButtonInlineMacroProcessor.java

@@ -0,0 +1,22 @@
+package io.quarkus.docs.generation;
+
+import java.util.Map;
+
+import org.asciidoctor.ast.ContentNode;
+import org.asciidoctor.extension.InlineMacroProcessor;
+import org.asciidoctor.extension.Name;
+
+/**
+ * Inline macro implementation for PDF (HTML) files where copy button is not supported.
+ * The copy button macro is replaced with empty HTML 'code' element. The empty element is part of the DOM but not visible.
+ * This processor must exist because we cannot use Asciidoc 'ifdef' directive inline inside a config table row.
+ */
+@Name("config_property_copy_button")
+public class PropertyCopyButtonInlineMacroProcessor extends InlineMacroProcessor {
+
+    @Override
+    public Object process(ContentNode contentNode, String target, Map<String, Object> map) {
+        // creates empty 'code' element: <code></code>
+        return createPhraseNode(contentNode, "quoted", "");
+    }
+}