From ca3bf30d821138e17659c22b19e29261e386932c Mon Sep 17 00:00:00 2001
From: IgnatBeresnev <ignat.beresnev@jetbrains.com>
Date: Wed, 27 Jul 2022 15:54:25 +0200
Subject: [PATCH 1/2] Make current breadcrumb element not clickable and of
 default font color

---
 .../src/main/kotlin/renderers/html/HtmlRenderer.kt | 14 ++++++++++++--
 .../base/src/main/resources/dokka/styles/style.css |  4 ++++
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
index 9be7428a8a..773d952965 100644
--- a/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
+++ b/plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt
@@ -635,8 +635,18 @@ open class HtmlRenderer(
         }
 
     private fun FlowContent.buildNavigationElement(node: PageNode, page: PageNode) =
-        if (node.isNavigable) buildLink(node, page)
-        else text(node.name)
+        if (node.isNavigable) {
+            val isCurrentPage = (node == page)
+            if (isCurrentPage) {
+                span(classes = "current") {
+                    text(node.name)
+                }
+            } else {
+                buildLink(node, page)
+            }
+        } else {
+            text(node.name)
+        }
 
     private fun FlowContent.buildLink(to: PageNode, from: PageNode) =
         locationProvider.resolve(to, from)?.let { path ->
diff --git a/plugins/base/src/main/resources/dokka/styles/style.css b/plugins/base/src/main/resources/dokka/styles/style.css
index 9bc9f07d03..a9c6e327f9 100644
--- a/plugins/base/src/main/resources/dokka/styles/style.css
+++ b/plugins/base/src/main/resources/dokka/styles/style.css
@@ -150,6 +150,10 @@ html ::-webkit-scrollbar-thumb {
     margin: auto 2px;
 }
 
+.breadcrumbs .current {
+    color: var(--default-font-color);
+}
+
 .tabs-section > .section-tab:first-child,
 .platform-hinted > .platform-bookmarks-row > .platform-bookmark:first-child {
     margin-left: 0;

From 8eea1f143edca3f30cef0c5de80460867f4d7211 Mon Sep 17 00:00:00 2001
From: IgnatBeresnev <ignat.beresnev@jetbrains.com>
Date: Wed, 27 Jul 2022 16:19:58 +0200
Subject: [PATCH 2/2] Add simple tests for breadcrumbs

---
 .../kotlin/renderers/html/BreadcrumbsTest.kt  | 84 +++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 plugins/base/src/test/kotlin/renderers/html/BreadcrumbsTest.kt

diff --git a/plugins/base/src/test/kotlin/renderers/html/BreadcrumbsTest.kt b/plugins/base/src/test/kotlin/renderers/html/BreadcrumbsTest.kt
new file mode 100644
index 0000000000..bebc41dcde
--- /dev/null
+++ b/plugins/base/src/test/kotlin/renderers/html/BreadcrumbsTest.kt
@@ -0,0 +1,84 @@
+package renderers.html
+
+import org.jetbrains.dokka.base.testApi.testRunner.BaseAbstractTest
+import org.jsoup.nodes.Element
+import org.junit.jupiter.api.Test
+import signatures.renderedContent
+import utils.*
+
+class BreadcrumbsTest : BaseAbstractTest() {
+
+    private val configuration = dokkaConfiguration {
+        sourceSets {
+            sourceSet {
+                sourceRoots = listOf("src/")
+            }
+        }
+    }
+
+    @Test
+    fun `should add breadcrumbs with current element`() {
+        val writerPlugin = TestOutputWriterPlugin()
+        testInline(
+            """
+            |/src/main/kotlin/basic/TestClass.kt
+            |package testpackage
+            |
+            |class TestClass {
+            |    fun foo() {}
+            |}
+        """.trimMargin(),
+            configuration,
+            pluginOverrides = listOf(writerPlugin)
+        ) {
+            renderingStage = { _, _ ->
+                writerPlugin.writer.renderedContent("root/testpackage/-test-class/foo.html").selectBreadcrumbs().match(
+                    link("root"),
+                    delimiter(),
+                    link("testpackage"),
+                    delimiter(),
+                    link("TestClass"),
+                    delimiter(),
+                    current("foo"),
+                    ignoreSpanWithTokenStyle = true
+                )
+            }
+        }
+    }
+
+    @Test
+    fun `should mark only one element as current even if more elements have the same name`() {
+        val writerPlugin = TestOutputWriterPlugin()
+        testInline(
+            """
+            |/src/main/kotlin/basic/TestClass.kt
+            |package testpackage
+            |
+            |class testname {
+            |    val testname: String = ""
+            |}
+        """.trimMargin(),
+            configuration,
+            pluginOverrides = listOf(writerPlugin)
+        ) {
+            renderingStage = { _, _ ->
+                writerPlugin.writer.renderedContent("root/testpackage/testname/testname.html").selectBreadcrumbs().match(
+                    link("root"),
+                    delimiter(),
+                    link("testpackage"),
+                    delimiter(),
+                    link("testname"),
+                    delimiter(),
+                    current("testname"),
+                    ignoreSpanWithTokenStyle = true
+                )
+            }
+        }
+    }
+
+    private fun Element.selectBreadcrumbs() = this.select("div.breadcrumbs").single()
+
+    private fun link(text: String): Tag = A(text)
+    private fun delimiter(): Tag = Span().withClasses("delimiter")
+    private fun current(text: String): Tag = Span(text).withClasses("current")
+}