From e9e95f6bdefa2ea4bd2cc1a79ed642ff57b25e48 Mon Sep 17 00:00:00 2001
From: Ignat Beresnev <ignat.beresnev@jetbrains.com>
Date: Wed, 17 Aug 2022 16:27:51 +0200
Subject: [PATCH] Do not render platform tabs for common-only content (#2613)

---
 .../src/main/kotlin/renderers/html/HtmlRenderer.kt | 14 ++++++++++++--
 .../base/src/main/resources/dokka/styles/style.css |  4 ++--
 2 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
index 55afef80b6..945fff3857 100644
--- a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
+++ b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
@@ -3,6 +3,7 @@ package org.jetbrains.dokka.base.renderers.html
 import kotlinx.html.*
 import kotlinx.html.stream.createHTML
 import org.jetbrains.dokka.DokkaSourceSetID
+import org.jetbrains.dokka.Platform
 import org.jetbrains.dokka.base.DokkaBase
 import org.jetbrains.dokka.base.renderers.*
 import org.jetbrains.dokka.base.renderers.html.command.consumers.ImmediateResolutionTagConsumer
@@ -201,12 +202,21 @@ open class HtmlRenderer(
         shouldHaveTabs: Boolean = shouldRenderSourceSetBubbles
     ) {
         val contents = contentsForSourceSetDependent(nodes, pageContext)
+        val isOnlyCommonContent = contents.singleOrNull()?.let { (sourceSet, _) ->
+            sourceSet.platform == Platform.common
+                    && sourceSet.name.equals("common", ignoreCase = true)
+                    && sourceSet.sourceSetIDs.all.all { sourceSetDependencyMap[it]?.isEmpty() == true }
+        } ?: false
 
-        val divStyles = "platform-hinted ${styles.joinToString()}" + if (shouldHaveTabs) " with-platform-tabs" else ""
+        // little point in rendering a single "common" tab - it can be
+        // assumed that code without any tabs is common by default
+        val renderTabs = shouldHaveTabs && !isOnlyCommonContent
+
+        val divStyles = "platform-hinted ${styles.joinToString()}" + if (renderTabs) " with-platform-tabs" else ""
         div(divStyles) {
             attributes["data-platform-hinted"] = "data-platform-hinted"
             extra.extraHtmlAttributes().forEach { attributes[it.extraKey] = it.extraValue }
-            if (shouldHaveTabs) {
+            if (renderTabs) {
                 div("platform-bookmarks-row") {
                     attributes["data-toggle-list"] = "data-toggle-list"
                     contents.forEachIndexed { index, pair ->
diff --git a/plugins/base/src/main/resources/dokka/styles/style.css b/plugins/base/src/main/resources/dokka/styles/style.css
index 989b54b80a..8e379c7502 100644
--- a/plugins/base/src/main/resources/dokka/styles/style.css
+++ b/plugins/base/src/main/resources/dokka/styles/style.css
@@ -953,8 +953,8 @@ td.content {
     padding-bottom: 8px;
 }
 
-.table-row .with-platform-tabs .sourceset-dependent-content .brief,
-.table-row .with-platform-tabs .sourceset-dependent-content .inline-comment {
+.table-row .platform-hinted .sourceset-dependent-content .brief,
+.table-row .platform-hinted .sourceset-dependent-content .inline-comment {
     padding: 8px;
 }