Unifing model for pages with content ant technical renderer specific pages

1 files changed, 40 insertions, 0 deletions

diff --git a/core/src/main/kotlin/pages/RendererSpecificPage.kt b/core/src/main/kotlin/pages/RendererSpecificPage.kt
new file mode 100644
index 00000000..85e6d530
--- /dev/null
+++ b/core/src/main/kotlin/pages/RendererSpecificPage.kt
@@ -0,0 +1,40 @@
+package org.jetbrains.dokka.pages
+
+import org.jetbrains.dokka.renderers.Renderer
+import kotlin.reflect.KClass
+
+interface RendererSpecificPage : PageNode {
+    val strategy: RenderingStrategy
+}
+
+class RendererSpecificRootPage(
+    override val name: String,
+    override val children: List<PageNode>,
+    override val strategy: RenderingStrategy
+) : RootPageNode(), RendererSpecificPage {
+    override fun modified(name: String, children: List<PageNode>): RendererSpecificRootPage =
+        RendererSpecificRootPage(name, children, strategy)
+}
+
+class RendererSpecificResourcePage(
+    override val name: String,
+    override val children: List<PageNode>,
+    override val strategy: RenderingStrategy
+): RendererSpecificPage {
+    override fun modified(name: String, children: List<PageNode>): RendererSpecificResourcePage =
+        RendererSpecificResourcePage(name, children, strategy)
+}
+
+sealed class RenderingStrategy {
+    class Callback(val instructions: Renderer.(PageNode) -> String): RenderingStrategy()
+    data class Copy(val from: String) : RenderingStrategy()
+    data class Write(val text: String) : RenderingStrategy()
+    object DoNothing : RenderingStrategy()
+
+    companion object {
+        inline operator fun <reified T: Renderer> invoke(crossinline instructions: T.(PageNode) -> String) =
+            Callback { if (this is T) instructions(it) else throw WrongRendererTypeException(T::class) }
+    }
+}
+
+data class WrongRendererTypeException(val expectedType: KClass<*>): Exception()
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