3 files changed, 261 insertions, 0 deletions
diff --git a/src/Documentation/DocumentationBuilder.kt b/src/Documentation/DocumentationBuilder.kt
new file mode 100644
index 00000000..77f74eb2
--- /dev/null
+++ b/src/Documentation/DocumentationBuilder.kt
@@ -0,0 +1,73 @@
+package org.jetbrains.dokka
+
+import org.jetbrains.jet.lang.resolve.*
+import org.jetbrains.jet.lang.psi.*
+import org.jetbrains.jet.lang.descriptors.*
+import org.jetbrains.jet.lang.descriptors.impl.*
+
+fun BindingContext.createDocumentation(file: JetFile): DocumentationModel {
+    val model = DocumentationModel()
+    val packageFragment = getPackageFragment(file)
+    if (packageFragment == null) throw IllegalArgumentException("File $file should have package fragment")
+
+    val visitor = DocumentationBuilderVisitor(this)
+    visitDescriptor(packageFragment, model, visitor)
+
+    return model
+}
+
+class DocumentationBuilderVisitor(val context: BindingContext) : DeclarationDescriptorVisitorEmptyBodies<DocumentationNode, DocumentationNode>() {
+
+    override fun visitDeclarationDescriptor(descriptor: DeclarationDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc, DocumentationNodeKind.Unknown)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+
+    override fun visitValueParameterDescriptor(descriptor: ValueParameterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc, DocumentationNodeKind.Parameter)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Detail)
+        return node
+    }
+
+    override fun visitClassDescriptor(descriptor: ClassDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc,
+                                     when (descriptor.getKind()) {
+                                         ClassKind.OBJECT -> DocumentationNodeKind.Object
+                                         else -> DocumentationNodeKind.Class
+                                     }
+                                    )
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+
+    override fun visitFunctionDescriptor(descriptor: FunctionDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc, DocumentationNodeKind.Function)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+
+    override fun visitPropertyDescriptor(descriptor: PropertyDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc, DocumentationNodeKind.Property)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+
+    override fun visitConstructorDescriptor(descriptor: ConstructorDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val doc = context.getDocumentation(descriptor!!).extractText()
+        val node = DocumentationNode(descriptor.getName().asString(), doc, DocumentationNodeKind.Constructor)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+
+    override fun visitPackageFragmentDescriptor(descriptor: PackageFragmentDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = DocumentationNode(descriptor!!.fqName.asString(), "", DocumentationNodeKind.Package)
+        data?.addReferenceTo(node, DocumentationReferenceKind.Member)
+        return node
+    }
+}
diff --git a/src/Documentation/DocumentationBuildingVisitor.kt b/src/Documentation/DocumentationBuildingVisitor.kt
new file mode 100644
index 00000000..e7b3fc09
--- /dev/null
+++ b/src/Documentation/DocumentationBuildingVisitor.kt
@@ -0,0 +1,121 @@
+package org.jetbrains.dokka
+
+import org.jetbrains.jet.lang.descriptors.*
+import org.jetbrains.jet.lang.resolve.name.FqName
+
+class DocumentationBuildingVisitor(private val worker: DeclarationDescriptorVisitor<DocumentationNode, DocumentationNode>)
+: DeclarationDescriptorVisitor<DocumentationNode, DocumentationNode> {
+
+    private fun visitChildren(descriptors: Collection<DeclarationDescriptor>, data: DocumentationNode) {
+        for (descriptor in descriptors) {
+            if (descriptor.isUserCode())
+                descriptor.accept(this, data)
+        }
+    }
+
+    private fun visitChild(descriptor: DeclarationDescriptor?, data: DocumentationNode) {
+        if (descriptor != null && descriptor.isUserCode())
+            descriptor.accept(this, data)
+    }
+
+    private fun createDocumentation(descriptor: DeclarationDescriptor, data: DocumentationNode): DocumentationNode {
+        return descriptor.accept(worker, data)
+    }
+
+    private fun processCallable(descriptor: CallableDescriptor, data: DocumentationNode): DocumentationNode {
+        val node = createDocumentation(descriptor, data)
+        visitChildren(descriptor.getTypeParameters(), node)
+        visitChild(descriptor.getReceiverParameter(), node)
+        visitChildren(descriptor.getValueParameters(), node)
+        return node
+    }
+
+    public override fun visitPackageFragmentDescriptor(descriptor: PackageFragmentDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        visitChildren(descriptor.getMemberScope().getAllDescriptors(), node)
+        return node
+    }
+
+    public override fun visitPackageViewDescriptor(descriptor: PackageViewDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        visitChildren(descriptor.getMemberScope().getAllDescriptors(), node)
+        return node
+    }
+
+    public override fun visitVariableDescriptor(descriptor: VariableDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = processCallable(descriptor!!, data!!)
+        return node
+    }
+
+    public override fun visitPropertyDescriptor(descriptor: PropertyDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = processCallable(descriptor!!, data!!)
+        visitChild(descriptor.getGetter(), node)
+        visitChild(descriptor.getSetter(), node)
+        return node
+    }
+
+    public override fun visitFunctionDescriptor(descriptor: FunctionDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = processCallable(descriptor!!, data!!)
+        return node
+    }
+
+    public override fun visitTypeParameterDescriptor(descriptor: TypeParameterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        return node
+    }
+
+    public override fun visitClassDescriptor(descriptor: ClassDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        if (descriptor.getKind() != ClassKind.OBJECT) {
+            // do not go inside object for class object and constructors, they are generated
+            visitChildren(descriptor.getTypeConstructor().getParameters(), node)
+            visitChildren(descriptor.getConstructors(), node)
+            visitChild(descriptor.getClassObjectDescriptor(), node)
+        }
+        val members = descriptor.getDefaultType().getMemberScope().getAllDescriptors().filter {
+            it !is CallableMemberDescriptor || it.isUserCode()
+        }
+        visitChildren(members, node)
+        return node
+    }
+
+    public override fun visitModuleDeclaration(descriptor: ModuleDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        visitChild(descriptor.getPackage(FqName.ROOT), node)
+        return node
+    }
+
+    public override fun visitConstructorDescriptor(constructorDescriptor: ConstructorDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = visitFunctionDescriptor(constructorDescriptor, data)
+        return node
+    }
+
+    public override fun visitScriptDescriptor(scriptDescriptor: ScriptDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = visitClassDescriptor(scriptDescriptor!!.getClassDescriptor(), data)
+        return node
+    }
+
+    public override fun visitValueParameterDescriptor(descriptor: ValueParameterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = visitVariableDescriptor(descriptor, data)
+        return node
+    }
+
+    public override fun visitPropertyGetterDescriptor(descriptor: PropertyGetterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = visitFunctionDescriptor(descriptor, data)
+        return node
+    }
+
+    public override fun visitPropertySetterDescriptor(descriptor: PropertySetterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = visitFunctionDescriptor(descriptor, data)
+        return node
+    }
+
+    public override fun visitReceiverParameterDescriptor(descriptor: ReceiverParameterDescriptor?, data: DocumentationNode?): DocumentationNode? {
+        val node = createDocumentation(descriptor!!, data!!)
+        return node
+    }
+}
+
+public fun visitDescriptor(descriptor: DeclarationDescriptor, data: DocumentationNode, visitor: DeclarationDescriptorVisitor<DocumentationNode, DocumentationNode>): DocumentationNode {
+    return descriptor.accept(DocumentationBuildingVisitor(visitor), data)
+}
diff --git a/src/Documentation/DocumentationModel.kt b/src/Documentation/DocumentationModel.kt
new file mode 100644
index 00000000..0113eb18
--- /dev/null
+++ b/src/Documentation/DocumentationModel.kt
@@ -0,0 +1,67 @@
+package org.jetbrains.dokka
+
+import org.jetbrains.jet.lang.resolve.BindingContext
+import org.jetbrains.jet.lang.psi.JetFile
+
+public enum class DocumentationNodeKind {
+    Unknown
+
+    Package
+    Class
+    Object
+    Constructor
+    Function
+    Property
+    Parameter
+    TypeParameter
+    Exception
+
+    Page
+    Model
+}
+
+public enum class DocumentationReferenceKind {
+    Member
+    Detail
+    Owner
+    Link
+    Override
+}
+
+public open class DocumentationNode(val name: String, val doc: String, val kind: DocumentationNodeKind) {
+    private val references = arrayListOf<DocumentationReference>()
+
+    public val owner: DocumentationNode
+        get() = references(DocumentationReferenceKind.Owner).single().to
+    public val details: List<DocumentationNode>
+        get() = references(DocumentationReferenceKind.Detail).map { it.to }
+    public val members: List<DocumentationNode>
+        get() = references(DocumentationReferenceKind.Member).map { it.to }
+    public val links: List<DocumentationNode>
+        get() = references(DocumentationReferenceKind.Link).map { it.to }
+
+    // TODO: Should we allow node mutation? Model merge will copy by ref, so references are transparent, which could nice
+    public fun addReferenceTo(to: DocumentationNode, kind: DocumentationReferenceKind) {
+        references.add(DocumentationReference(this, to, kind))
+    }
+
+    public fun addAllReferencesFrom(other: DocumentationNode) {
+        references.addAll(other.references)
+    }
+
+    public fun references(kind: DocumentationReferenceKind): List<DocumentationReference> = references.filter { it.kind == kind }
+}
+
+public class DocumentationModel : DocumentationNode("model", "", DocumentationNodeKind.Model) {
+    fun merge(other: DocumentationModel): DocumentationModel {
+        val model = DocumentationModel()
+        model.addAllReferencesFrom(other)
+        model.addAllReferencesFrom(this)
+        return model
+    }
+
+    public val nodes: List<DocumentationNode>
+        get() = members
+}
+
+public data class DocumentationReference(val from: DocumentationNode, val to: DocumentationNode, val kind: DocumentationReferenceKind)