2 files changed, 20 insertions, 5 deletions
diff --git a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
index 71a28345..ac2b1d02 100644
--- a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
+++ b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
@@ -34,9 +34,7 @@ open class HtmlRenderer(
                 .filter { it in sourceSet.dependentSourceSets }
         }.toMap()
 
-    private val shouldShowSourceSetBubbles by lazy {
-        sourceSetDependencyMap.size > 1
-    }
+    private var shouldRenderSourceSetBubbles: Boolean = false
 
     private val pageList = ConcurrentHashMap<String, Pair<String, String>>()
 
@@ -109,7 +107,7 @@ open class HtmlRenderer(
     }
 
     private fun FlowContent.filterButtons(page: ContentPage) {
-        if (shouldShowSourceSetBubbles) {
+        if (shouldRenderSourceSetBubbles) {
             div(classes = "filter-section") {
                 id = "filter-section"
                 page.content.withDescendants().flatMap { it.sourceSets }.distinct().forEach {
@@ -415,7 +413,7 @@ open class HtmlRenderer(
     }
 
     private fun FlowContent.createPlatformTagBubbles(sourceSets: List<ContentSourceSet>) {
-        if (shouldShowSourceSetBubbles) {
+        if (shouldRenderSourceSetBubbles) {
             div("platform-tags") {
                 sourceSets.forEach {
                     div("platform-tag") {
@@ -650,6 +648,7 @@ open class HtmlRenderer(
             .joinToString(prefix = "[", separator = ",\n", postfix = "]")
 
     override fun render(root: RootPageNode) {
+        shouldRenderSourceSetBubbles = shouldRenderSourceSetBubbles(root)
         super.render(root)
         runBlocking(Dispatchers.Default) {
             launch {
diff --git a/plugins/base/src/main/kotlin/renderers/html/shouldRenderSourceSetBubbles.kt b/plugins/base/src/main/kotlin/renderers/html/shouldRenderSourceSetBubbles.kt
new file mode 100644
index 00000000..3de58870
--- /dev/null
+++ b/plugins/base/src/main/kotlin/renderers/html/shouldRenderSourceSetBubbles.kt
@@ -0,0 +1,16 @@
+package org.jetbrains.dokka.base.renderers.html
+
+import org.jetbrains.dokka.model.withDescendants
+import org.jetbrains.dokka.pages.ContentPage
+import org.jetbrains.dokka.pages.RootPageNode
+
+internal fun shouldRenderSourceSetBubbles(page: RootPageNode): Boolean {
+    return page.withDescendants()
+        .flatMap { pageNode ->
+            if (pageNode is ContentPage) pageNode.content.withDescendants()
+            else emptySequence()
+        }
+        .flatMap { contentNode -> contentNode.sourceSets }
+        .distinct()
+        .count() > 1
+}