Make current breadcrumb element not clickable and of default font col…

…or (#2588)

plugins/base/src/main/kotlin/renderers/html/HtmlRenderer.kt

@@ -634,8 +634,18 @@ 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 ->

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;

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")
+}