[backport] Fix problems in as-java java-layout-html mode

Extract common part of LanguageServices & other improvements

Original: 853262e

1 files changed, 190 insertions, 0 deletions

diff --git a/core/src/main/kotlin/Languages/NewJavaLanguageService.kt b/core/src/main/kotlin/Languages/NewJavaLanguageService.kt
new file mode 100644
index 00000000..22ad62b2
--- /dev/null
+++ b/core/src/main/kotlin/Languages/NewJavaLanguageService.kt
@@ -0,0 +1,190 @@
+package org.jetbrains.dokka
+
+/**
+ * Implements [LanguageService] and provides rendering of symbols in Java language
+ */
+class NewJavaLanguageService : CommonLanguageService() {
+    override fun render(node: DocumentationNode, renderMode: LanguageService.RenderMode): ContentNode {
+        return content {
+            (when (node.kind) {
+                NodeKind.Package -> renderPackage(node)
+                in NodeKind.classLike -> renderClass(node)
+
+                NodeKind.Modifier -> renderModifier(this, node)
+                NodeKind.TypeParameter -> renderTypeParameter(node)
+                NodeKind.Type,
+                NodeKind.UpperBound -> renderType(node)
+
+                NodeKind.Constructor,
+                NodeKind.Function -> renderFunction(node)
+                NodeKind.Property -> renderProperty(node)
+                else -> "${node.kind}: ${node.name}"
+            })
+        }
+    }
+
+    override fun summarizeSignatures(nodes: List<DocumentationNode>): ContentNode? = null
+
+
+    override fun renderModifier(block: ContentBlock, node: DocumentationNode, nowrap: Boolean) {
+        when (node.name) {
+            "open", "internal" -> {
+            }
+            else -> super.renderModifier(block, node, nowrap)
+        }
+    }
+
+    fun getArrayElementType(node: DocumentationNode): DocumentationNode? = when (node.qualifiedName()) {
+        "kotlin.Array" ->
+            node.details(NodeKind.Type).singleOrNull()?.let { et -> getArrayElementType(et) ?: et }
+                    ?: DocumentationNode("Object", node.content, NodeKind.ExternalClass)
+
+        "kotlin.IntArray", "kotlin.LongArray", "kotlin.ShortArray", "kotlin.ByteArray",
+        "kotlin.CharArray", "kotlin.DoubleArray", "kotlin.FloatArray", "kotlin.BooleanArray" ->
+            DocumentationNode(node.name.removeSuffix("Array").toLowerCase(), node.content, NodeKind.Type)
+
+        else -> null
+    }
+
+    fun getArrayDimension(node: DocumentationNode): Int = when (node.qualifiedName()) {
+        "kotlin.Array" ->
+            1 + (node.details(NodeKind.Type).singleOrNull()?.let { getArrayDimension(it) } ?: 0)
+
+        "kotlin.IntArray", "kotlin.LongArray", "kotlin.ShortArray", "kotlin.ByteArray",
+        "kotlin.CharArray", "kotlin.DoubleArray", "kotlin.FloatArray", "kotlin.BooleanArray" ->
+            1
+        else -> 0
+    }
+
+    fun ContentBlock.renderType(node: DocumentationNode) {
+        when (node.name) {
+            "Unit" -> identifier("void")
+            "Int" -> identifier("int")
+            "Long" -> identifier("long")
+            "Double" -> identifier("double")
+            "Float" -> identifier("float")
+            "Char" -> identifier("char")
+            "Boolean" -> identifier("bool")
+        // TODO: render arrays
+            else -> renderLinked(this, node) {
+                identifier(node.name)
+            }
+        }
+    }
+
+    private fun ContentBlock.renderTypeParameter(node: DocumentationNode) {
+        val constraints = node.details(NodeKind.UpperBound)
+        if (constraints.none())
+            identifier(node.name)
+        else {
+            identifier(node.name)
+            text(" ")
+            keyword("extends")
+            text(" ")
+            constraints.forEach { renderType(node) }
+        }
+    }
+
+    private fun ContentBlock.renderParameter(node: DocumentationNode) {
+        renderType(node.detail(NodeKind.Type))
+        text(" ")
+        identifier(node.name)
+    }
+
+    private fun ContentBlock.renderTypeParametersForNode(node: DocumentationNode) {
+        val typeParameters = node.details(NodeKind.TypeParameter)
+        if (typeParameters.any()) {
+            symbol("<")
+            renderList(typeParameters, noWrap = true) {
+                renderTypeParameter(it)
+            }
+            symbol(">")
+            text(" ")
+        }
+    }
+
+//    private fun renderModifiersForNode(node: DocumentationNode): String {
+//        val modifiers = node.details(NodeKind.Modifier).map { renderModifier(it) }.filter { it != "" }
+//        if (modifiers.none())
+//            return ""
+//        return modifiers.joinToString(" ", postfix = " ")
+//    }
+
+    private fun ContentBlock.renderClassKind(node: DocumentationNode) {
+        when (node.kind) {
+            NodeKind.Interface -> {
+                keyword("interface")
+            }
+            NodeKind.EnumItem -> {
+                keyword("enum value")
+            }
+            NodeKind.Enum -> {
+                keyword("enum")
+            }
+            NodeKind.Class, NodeKind.Exception, NodeKind.Object -> {
+                keyword("class")
+            }
+            else -> throw IllegalArgumentException("Node $node is not a class-like object")
+        }
+        text(" ")
+    }
+
+    private fun ContentBlock.renderClass(node: DocumentationNode) {
+        renderClassKind(node)
+
+        identifier(node.name)
+        renderTypeParametersForNode(node)
+    }
+
+    private fun ContentBlock.renderParameters(nodes: List<DocumentationNode>) {
+        renderList(nodes) {
+            renderParameter(it)
+        }
+    }
+
+    private fun ContentBlock.renderFunction(node: DocumentationNode) {
+        when (node.kind) {
+            NodeKind.Constructor -> identifier(node.owner?.name ?: "")
+            NodeKind.Function -> {
+                renderTypeParametersForNode(node)
+                renderType(node.detail(NodeKind.Type))
+                text(" ")
+                identifier(node.name)
+
+            }
+            else -> throw IllegalArgumentException("Node $node is not a function-like object")
+        }
+
+        val receiver = node.details(NodeKind.Receiver).singleOrNull()
+        symbol("(")
+        if (receiver != null)
+            renderParameters(listOf(receiver) + node.details(NodeKind.Parameter))
+        else
+            renderParameters(node.details(NodeKind.Parameter))
+
+        symbol(")")
+    }
+
+    private fun ContentBlock.renderProperty(node: DocumentationNode) {
+
+        when (node.kind) {
+            NodeKind.Property -> {
+                keyword("val")
+                text(" ")
+            }
+            else -> throw IllegalArgumentException("Node $node is not a property")
+        }
+        renderTypeParametersForNode(node)
+        val receiver = node.details(NodeKind.Receiver).singleOrNull()
+        if (receiver != null) {
+            renderType(receiver.detail(NodeKind.Type))
+            symbol(".")
+        }
+
+        identifier(node.name)
+        symbol(":")
+        text(" ")
+        renderType(node.detail(NodeKind.Type))
+
+    }
+}
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