feat: navigation for class signature

Add navigation for class signature. By the way, fix method navigation behavior.

CHANGELOG.md

@@ -3,11 +3,15 @@
 # BDLH Changelog
 
 ## [Unreleased]
+### Added
+- Navigation for class signature
+
 ### Changed
 - Update pluginIcon.svg
 
 ### Fixed
 - Subclasses resolving
+- Method navigation behavior
 
 ## [0.1.0]
 ### Added

src/main/kotlin/com/github/ceclin/bdlh/lang/BDL.bnf

@@ -35,7 +35,7 @@ root ::= (signature|fallback)*
 
 private fallback ::= LA | RA | LS | RS | LP | RP | DOT | SPACE | DOLLAR | COLON | COMMA | id | any
 
-signature ::= LA class_name COLON SPACE (method|field) RA
+signature ::= LA class_name (COLON SPACE (method|field))? RA
     {methods=[getReference]}
 
 class_name ::= type_name

src/main/kotlin/com/github/ceclin/bdlh/lang/ImplExt.kt

@@ -15,7 +15,7 @@ class RefToJava(element: BDLSignature) : PsiReferenceBase<BDLSignature>(element,
         }
 
         private fun resolveMethod(clazz: PsiClass, method: BDLMethod): PsiMethod? {
-            clazz.findMethodsByName(method.methodName.text, false).firstOrNull {
+            return clazz.findMethodsByName(method.methodName.text, false).firstOrNull {
                 val parameter = method.parameter
                 if (parameter == null)
                     it.hasParameters()
@@ -26,7 +26,6 @@ class RefToJava(element: BDLSignature) : PsiReferenceBase<BDLSignature>(element,
                     } == parameter.text
                 }
             }
-            return clazz.findMethodsByName(method.methodName.text, false).firstOrNull()
         }
     }
 
@@ -36,8 +35,9 @@ class RefToJava(element: BDLSignature) : PsiReferenceBase<BDLSignature>(element,
         // I don't know what jvmCompatible means. No document for this param.
         val clazz = ClassUtil.findPsiClass(PsiManager.getInstance(project), className, null, true)
             ?: return null
-        return element.field?.let { resolveField(clazz, it) }
-            ?: element.method?.let { resolveMethod(clazz, it) }
+        element.field?.let { return resolveField(clazz, it) }
+        element.method?.let { return resolveMethod(clazz, it) }
+        return clazz
     }
 }