[backport] Stabilize signatures to fix linking from Java to Kotlin

Basically there is 2 ways to get signature, from PSI and from
descriptors, and there should be only one way in one session

Original: adc09f2

3 files changed, 13 insertions, 10 deletions

diff --git a/core/src/main/kotlin/Model/DescriptorSignatureProvider.kt b/core/src/main/kotlin/Model/DescriptorSignatureProvider.kt
deleted file mode 100644
index 85584e3c..00000000
--- a/core/src/main/kotlin/Model/DescriptorSignatureProvider.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package org.jetbrains.dokka.Model
-
-import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
-
-interface DescriptorSignatureProvider {
-    fun signature(forDesc: DeclarationDescriptor): String
-}
\ No newline at end of file
diff --git a/core/src/main/kotlin/Model/DocumentationNode.kt b/core/src/main/kotlin/Model/DocumentationNode.kt
index 84501d2b..4739d736 100644
--- a/core/src/main/kotlin/Model/DocumentationNode.kt
+++ b/core/src/main/kotlin/Model/DocumentationNode.kt
@@ -176,16 +176,17 @@ val DocumentationNode.path: List<DocumentationNode>
         return parent.path + this
     }
 
-fun DocumentationNode.findOrCreatePackageNode(packageName: String, packageContent: Map<String, Content>, refGraph: NodeReferenceGraph): DocumentationNode {
-    val existingNode = members(NodeKind.Package).firstOrNull { it.name == packageName }
+fun findOrCreatePackageNode(module: DocumentationNode?, packageName: String, packageContent: Map<String, Content>, refGraph: NodeReferenceGraph): DocumentationNode {
+    val existingNode = refGraph.lookup(packageName)
     if (existingNode != null) {
         return existingNode
     }
     val newNode = DocumentationNode(packageName,
             packageContent.getOrElse(packageName) { Content.Empty },
             NodeKind.Package)
-    append(newNode, RefKind.Member)
+
     refGraph.register(packageName, newNode)
+    module?.append(newNode, RefKind.Member)
     return newNode
 }
 
diff --git a/core/src/main/kotlin/Model/ElementSignatureProvider.kt b/core/src/main/kotlin/Model/ElementSignatureProvider.kt
new file mode 100644
index 00000000..e8fdde6e
--- /dev/null
+++ b/core/src/main/kotlin/Model/ElementSignatureProvider.kt
@@ -0,0 +1,9 @@
+package org.jetbrains.dokka
+
+import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+
+interface ElementSignatureProvider {
+    fun signature(forDesc: DeclarationDescriptor): String
+    fun signature(forPsi: PsiElement): String
+}
\ No newline at end of file