add icon marker provider

Author: xepozz

src/main/kotlin/com/github/xepozz/gitattributes/ide/AttributesLineMarkerProvider.kt

@@ -0,0 +1,32 @@
+package com.github.xepozz.gitattributes.ide
+
+import com.github.xepozz.gitattributes.language.psi.AttributesPattern
+import com.intellij.codeInsight.daemon.RelatedItemLineMarkerInfo
+import com.intellij.codeInsight.daemon.RelatedItemLineMarkerProvider
+import com.intellij.codeInsight.navigation.NavigationGutterIconBuilder
+import com.intellij.icons.AllIcons
+import com.intellij.openapi.editor.markup.GutterIconRenderer
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiFile
+import com.intellij.psi.PsiFileSystemItem
+import kotlin.collections.firstNotNullOfOrNull
+
+class AttributesLineMarkerProvider : RelatedItemLineMarkerProvider() {
+    override fun collectNavigationMarkers(
+        element: PsiElement,
+        result: MutableCollection<in RelatedItemLineMarkerInfo<*>>
+    ) {
+        when (element) {
+            is AttributesPattern -> {
+                val target = element.references.firstNotNullOfOrNull { it.resolve() } as? PsiFileSystemItem ?: return
+//                println("target: $target")
+
+                val builder = NavigationGutterIconBuilder.create(target.getIcon(0) ?: AllIcons.Nodes.Target)
+                    .setTargets(target)
+                    .setTooltipText("Navigate to ${target.name}")
+
+                result.add(builder.createLineMarkerInfo(element))
+            }
+        }
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -34,12 +34,9 @@
         <!--        <lang.documentationProvider-->
         <!--                language="Gitattributes"-->
         <!--                implementationClass="com.github.xepozz.gitattributes.ide.documentation.AttributesDocumentationProvider"/>-->
-        <!--        <runLineMarkerContributor-->
-        <!--                language="Gitattributes"-->
-        <!--                implementationClass="com.github.xepozz.gitattributes.ide.AttributesRunCommandMarkerContributor"/>-->
-        <!--        <lang.foldingBuilder-->
-        <!--                language="Gitattributes"-->
-        <!--                implementationClass="com.github.xepozz.gitattributes.ide.CronScheduleFoldingBuilder"/>-->
+        <codeInsight.lineMarkerProvider
+                language="Gitattributes"
+                implementationClass="com.github.xepozz.gitattributes.ide.AttributesLineMarkerProvider"/>
         <lang.commenter
                 language="Gitattributes"
                 implementationClass="com.github.xepozz.gitattributes.ide.AttributesCommenter"/>