Show record body when showing a named record type in a process hover

hint (close #157)

Signed-off-by: Ben Sherman <bentshermann@gmail.com>

Author: bentsherman

src/main/java/nextflow/lsp/ast/ASTNodeStringUtils.java

@@ -58,7 +58,7 @@
 import static nextflow.script.types.TypeCheckingUtils.*;
 
 /**
- * Utility methods for retreiving text information for ast nodes.
+ * Utility methods for retrieving text information for ast nodes.
  *
  * @author Ben Sherman <bentshermann@gmail.com>
  */
@@ -213,6 +213,8 @@ private static void typedInput(Parameter input, Formatter fmt) {
             if( fmt.hasType(input) ) {
                 fmt.append(": ");
                 fmt.visitTypeAnnotation(input.getType());
+                if( input.getType().redirect() instanceof RecordNode )
+                    namedRecordBody(input.getType(), fmt);
             }
         }
     }
@@ -250,6 +252,25 @@ private static void processTupleInput(TupleParameter tp, Formatter fmt) {
         fmt.append(">");
     }
 
+    private static void namedRecordBody(ClassNode type, Formatter fmt) {
+        var fields = type.redirect().getFields();
+        if( fields.isEmpty() )
+            return;
+        fmt.append(" {");
+        fmt.appendNewLine();
+        fmt.incIndent();
+        for( var fn : fields ) {
+            fmt.appendIndent();
+            fmt.append(fn.getName());
+            fmt.append(": ");
+            fmt.append(TypesEx.getName(fn.getType()));
+            fmt.appendNewLine();
+        }
+        fmt.decIndent();
+        fmt.appendIndent();
+        fmt.append('}');
+    }
+
     private static String processToLabel(ProcessNodeV1 node) {
         var fmt = new Formatter(new FormattingOptions(2, true));
         fmt.append("process ");

src/test/groovy/nextflow/lsp/services/script/ScriptHoverTest.groovy

@@ -80,6 +80,50 @@ class ScriptHoverTest extends Specification {
         value.startsWith('```nextflow\nworkflow HELLO {')
     }
 
+    def 'should expand a named record type when hovering over a process' () {
+        given:
+        def service = getScriptService()
+        def uri = getUri('main.nf')
+
+        when:
+        open(service, uri, '''\
+            nextflow.enable.types = true
+
+            record SamtoolsIndexInput {
+                id: String
+                input: Path
+            }
+
+            process SAMTOOLS_INDEX {
+                input:
+                data: SamtoolsIndexInput
+
+                script:
+                'samtools index'
+            }
+
+            workflow {
+                SAMTOOLS_INDEX( channel.empty() )
+            }
+            ''')
+        service.updateNow()
+        def value = getHoverHint(service, uri, new Position(16, 4))
+        then:
+        value == '''\
+            ```nextflow
+            process SAMTOOLS_INDEX {
+              input:
+              data: SamtoolsIndexInput {
+                id: String
+                input: Path
+              }
+
+              output:
+              <none>
+            }
+            ```'''.stripIndent(true)
+    }
+
     def 'should return null when hovering over whitespace' () {
         given:
         def service = getScriptService()