Debug logs

Closes #34

.github/FUNDING.yml

@@ -1,3 +1 @@
-github: chylex
-patreon: chylex
 ko_fi: chylex

.gitignore

@@ -3,4 +3,5 @@
 !/.idea/runConfigurations
 
 /.gradle/
+/.intellijPlatform/
 /build/

README.md

@@ -2,7 +2,9 @@
 
 Displays errors, warnings, and other inspections inline. Highlights the background of lines with inspections. Supports light and dark themes out of the box.
 
-By default, the plugin shows **Errors**, **Warnings**, **Weak Warnings**, **Server Problems**, **Grammar Errors**, **Typos**, and other inspections with a high enough severity level. Configure visible severities in **Settings | Tools | Inspection Lens**.
+By default, the plugin shows **Errors**, **Warnings**, **Weak Warnings**, **Server Problems**, **Grammar Errors**, **Typos**, and other inspections with a high enough severity level. Left-click an inspection to show quick fixes. Middle-click an inspection to navigate to the relevant code in the editor.
+
+Configure appearance, behavior of clicking on inspections, and visible severities in **Settings | Tools | Inspection Lens**.
 
 Inspired by [Error Lens](https://marketplace.visualstudio.com/items?itemName=usernamehw.errorlens) for Visual Studio Code, and [Inline Error](https://plugins.jetbrains.com/plugin/17302-inlineerror) for IntelliJ Platform.
 

build.gradle.kts

@@ -1,48 +1,50 @@
 @file:Suppress("ConvertLambdaToReference")
 
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-
 plugins {
-	kotlin("jvm") version "1.8.0"
+	kotlin("jvm")
-	id("org.jetbrains.intellij") version "1.17.0"
+	id("org.jetbrains.intellij.platform")
 }
 
 group = "com.chylex.intellij.inspectionlens"
-version = "1.4.1"
+version = "1.5.2.902"
 
 repositories {
 	mavenCentral()
+	
+	intellijPlatform {
+		defaultRepositories()
+	}
 }
 
-intellij {
+dependencies {
-	version.set("2023.3.3")
+	intellijPlatform {
-	updateSinceUntilBuild.set(false)
+		intellijIdeaUltimate("2025.1")
+		bundledPlugin("tanvd.grazi")
+	}
 	
-	plugins.add("tanvd.grazi")
+	testImplementation("org.junit.jupiter:junit-jupiter:5.9.2")
+}
+
+intellijPlatform {
+	pluginConfiguration {
+		ideaVersion {
+			sinceBuild.set("233.11361.10")
+			untilBuild.set(provider { null })
+		}
+	}
 }
 
 kotlin {
 	jvmToolchain(17)
-}
 	
-dependencies {
+	compilerOptions {
-	testImplementation("org.junit.jupiter:junit-jupiter:5.9.2")
+		freeCompilerArgs = listOf(
-}
+			"-X" + "jvm-default=all",
-
+			"-X" + "lambdas=indy"
-tasks.patchPluginXml {
+		)
-	sinceBuild.set("233.11361.10")
+	}
-}
-
-tasks.buildSearchableOptions {
-	enabled = false
 }
 
 tasks.test {
 	useJUnitPlatform()
 }
-
-tasks.withType<KotlinCompile> {
-	kotlinOptions.freeCompilerArgs = listOf(
-		"-Xjvm-default=all"
-	)
-}

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.12-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -84,7 +86,7 @@ done
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
 # Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum

gradlew.bat

@@ -13,6 +13,8 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
 @if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
@@ -43,11 +45,11 @@ set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
 if %ERRORLEVEL% equ 0 goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -57,11 +59,11 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 

settings.gradle.kts

@@ -1 +1,8 @@
 rootProject.name = "InspectionLens"
+
+pluginManagement {
+	plugins {
+		kotlin("jvm") version "2.1.0"
+		id("org.jetbrains.intellij.platform") version "2.2.1"
+	}
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/InspectionLens.kt

@@ -3,6 +3,7 @@ package com.chylex.intellij.inspectionlens
 import com.chylex.intellij.inspectionlens.editor.EditorLensFeatures
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.components.service
+import com.intellij.openapi.diagnostic.logger
 import com.intellij.openapi.fileEditor.FileEditorManager
 import com.intellij.openapi.fileEditor.TextEditor
 import com.intellij.openapi.project.ProjectManager
@@ -13,6 +14,8 @@ import com.intellij.openapi.project.ProjectManager
 internal object InspectionLens {
 	const val PLUGIN_ID = "com.chylex.intellij.inspectionlens"
 	
+	val LOG = logger<InspectionLens>()
+	
 	/**
 	 * Installs lenses into [editor].
 	 */

src/main/kotlin/com/chylex/intellij/inspectionlens/InspectionLensFileOpenedListener.kt

@@ -11,6 +11,8 @@ import com.intellij.openapi.vfs.VirtualFile
  */
 class InspectionLensFileOpenedListener : FileOpenedSyncListener {
 	override fun fileOpenedSync(source: FileEditorManager, file: VirtualFile, editorsWithProviders: List<FileEditorWithProvider>) {
+		InspectionLens.LOG.info("File opened: $file (editor count: ${editorsWithProviders.size})")
+		
 		for (editorWrapper in editorsWithProviders) {
 			val fileEditor = editorWrapper.fileEditor
 			if (fileEditor is TextEditor) {

src/main/kotlin/com/chylex/intellij/inspectionlens/debug/Highlighter.kt

@@ -0,0 +1,9 @@
+package com.chylex.intellij.inspectionlens.debug
+
+import com.intellij.codeInsight.daemon.impl.HighlightInfo
+import com.intellij.lang.annotation.HighlightSeverity
+import com.intellij.openapi.editor.markup.RangeHighlighter
+
+data class Highlighter(val hashCode: Int, val layer: Int, val severity: HighlightSeverity, val description: String) {
+	constructor(highlighter: RangeHighlighter, info: HighlightInfo) : this(System.identityHashCode(highlighter), highlighter.layer, info.severity, info.description)
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/debug/LensEvent.kt

@@ -0,0 +1,5 @@
+package com.chylex.intellij.inspectionlens.debug
+
+import java.time.Instant
+
+data class LensEvent(val time: Instant, val data: LensEventData)

src/main/kotlin/com/chylex/intellij/inspectionlens/debug/LensEventData.kt

@@ -0,0 +1,7 @@
+package com.chylex.intellij.inspectionlens.debug
+
+sealed interface LensEventData {
+	data class MarkupModelAfterAdded(val lens: Highlighter) : LensEventData
+	data class MarkupModelAttributesChanged(val lens: Highlighter) : LensEventData
+	data class MarkupModelBeforeRemoved(val lens: Highlighter) : LensEventData
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/debug/LensEventManager.kt

@@ -0,0 +1,14 @@
+package com.chylex.intellij.inspectionlens.debug
+
+import com.intellij.openapi.editor.Editor
+import java.time.Instant
+
+object LensEventManager {
+	val fileNameToEventsMap = mutableMapOf<String, MutableList<LensEvent>>()
+	
+	@Synchronized
+	fun addEvent(editor: Editor, event: LensEventData) {
+		val path = editor.virtualFile?.path ?: return
+		fileNameToEventsMap.getOrPut(path, ::mutableListOf).add(LensEvent(Instant.now(), event))
+	}
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/EditorLensFeatures.kt

@@ -1,7 +1,9 @@
 package com.chylex.intellij.inspectionlens.editor
 
+import com.chylex.intellij.inspectionlens.InspectionLens
 import com.intellij.openapi.Disposable
 import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.editor.ex.FoldingModelEx
 import com.intellij.openapi.editor.ex.MarkupModelEx
 import com.intellij.openapi.editor.impl.DocumentMarkupModel
 import com.intellij.openapi.util.Disposer
@@ -13,15 +15,18 @@ import com.intellij.openapi.util.Key
 internal class EditorLensFeatures private constructor(
 	editor: Editor,
 	private val markupModel: MarkupModelEx,
+	foldingModel: FoldingModelEx?,
 	disposable: Disposable
 ) {
 	private val lensManager = EditorLensManager(editor)
 	private val lensManagerDispatcher = EditorLensManagerDispatcher(lensManager)
-	private val markupModelListener = LensMarkupModelListener(lensManagerDispatcher)
+	private val markupModelListener = LensMarkupModelListener(editor, lensManagerDispatcher)
 	
 	init {
 		markupModel.addMarkupModelListener(disposable, markupModelListener)
 		markupModelListener.showAllValid(markupModel.allHighlighters)
+		
+		foldingModel?.addListener(LensFoldingModelListener(lensManager), disposable)
 	}
 	
 	private fun refresh() {
@@ -34,18 +39,28 @@ internal class EditorLensFeatures private constructor(
 		
 		fun install(editor: Editor, disposable: Disposable) {
 			if (editor.getUserData(EDITOR_KEY) != null) {
+				InspectionLens.LOG.info("Skipped installation to: $editor")
 				return
 			}
 			
+			InspectionLens.LOG.info("Installing to: $editor")
+			
 			val markupModel = DocumentMarkupModel.forDocument(editor.document, editor.project, false) as? MarkupModelEx ?: return
-			val features = EditorLensFeatures(editor, markupModel, disposable)
+			val foldingModel = editor.foldingModel as? FoldingModelEx
+			val features = EditorLensFeatures(editor, markupModel, foldingModel, disposable)
 			
 			editor.putUserData(EDITOR_KEY, features)
-			Disposer.register(disposable) { editor.putUserData(EDITOR_KEY, null) }
+			
+			Disposer.register(disposable) {
+				InspectionLens.LOG.info("Installation disposed: $editor", Exception("DISPOSE STACK TRACE"))
+				editor.putUserData(EDITOR_KEY, null)
+			}
 		}
 		
 		fun refresh(editor: Editor) {
-			editor.getUserData(EDITOR_KEY)?.refresh()
+			val userData = editor.getUserData(EDITOR_KEY)
+			InspectionLens.LOG.info("Refreshing: $editor ($userData)")
+			userData?.refresh()
 		}
 	}
 }

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/EditorLensManager.kt

@@ -1,7 +1,9 @@
 package com.chylex.intellij.inspectionlens.editor
 
+import com.chylex.intellij.inspectionlens.debug.Highlighter
 import com.chylex.intellij.inspectionlens.editor.lens.EditorLens
 import com.chylex.intellij.inspectionlens.settings.LensSettingsState
+import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.openapi.components.service
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.markup.RangeHighlighter
@@ -14,6 +16,9 @@ internal class EditorLensManager(private val editor: Editor) {
 	private val lenses = IdentityHashMap<RangeHighlighter, EditorLens>()
 	private val settings = service<LensSettingsState>()
 	
+	private val highlighters
+		get() = lenses.keys.map { Highlighter(it, HighlightInfo.fromRangeHighlighter(it)!!) }
+	
 	private fun show(highlighterWithInfo: HighlighterWithInfo) {
 		val (highlighter, info) = highlighterWithInfo
 		
@@ -56,6 +61,10 @@ internal class EditorLensManager(private val editor: Editor) {
 		}
 	}
 	
+	fun onFoldRegionsChanged() {
+		lenses.values.forEach(EditorLens::onFoldRegionsChanged)
+	}
+	
 	sealed interface Command {
 		fun apply(lensManager: EditorLensManager)
 		

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/LensFoldingModelListener.kt

@@ -0,0 +1,12 @@
+package com.chylex.intellij.inspectionlens.editor
+
+import com.intellij.openapi.editor.ex.FoldingListener
+
+/**
+ * Listens for code folding events and reports them to [EditorLensManager].
+ */
+internal class LensFoldingModelListener(private val lensManager: EditorLensManager) : FoldingListener {
+	override fun onFoldProcessingEnd() {
+		lensManager.onFoldRegionsChanged()
+	}
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/LensMarkupModelListener.kt

@@ -1,8 +1,13 @@
 package com.chylex.intellij.inspectionlens.editor
 
+import com.chylex.intellij.inspectionlens.InspectionLens
+import com.chylex.intellij.inspectionlens.debug.Highlighter
+import com.chylex.intellij.inspectionlens.debug.LensEventData
+import com.chylex.intellij.inspectionlens.debug.LensEventManager
 import com.chylex.intellij.inspectionlens.settings.LensSettingsState
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.openapi.components.service
+import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.ex.RangeHighlighterEx
 import com.intellij.openapi.editor.impl.event.MarkupModelListener
 import com.intellij.openapi.editor.markup.RangeHighlighter
@@ -10,20 +15,36 @@ import com.intellij.openapi.editor.markup.RangeHighlighter
 /**
  * Listens for inspection highlights and reports them to [EditorLensManager].
  */
-internal class LensMarkupModelListener(private val lensManagerDispatcher: EditorLensManagerDispatcher) : MarkupModelListener {
+internal class LensMarkupModelListener(private val editor: Editor, private val lensManagerDispatcher: EditorLensManagerDispatcher) : MarkupModelListener {
 	private val settings = service<LensSettingsState>()
 	
 	override fun afterAdded(highlighter: RangeHighlighterEx) {
-		showIfValid(highlighter)
+		try {
+			getFilteredHighlightInfo(highlighter)?.let { LensEventManager.addEvent(editor, LensEventData.MarkupModelAfterAdded(Highlighter(highlighter, it))) }
+			showIfValid(highlighter)
+		} catch (e: Exception) {
+			InspectionLens.LOG.error("Error showing inspection", e)
+		}
 	}
 	
 	override fun attributesChanged(highlighter: RangeHighlighterEx, renderersChanged: Boolean, fontStyleOrColorChanged: Boolean) {
-		showIfValid(highlighter)
+		try {
+			getFilteredHighlightInfo(highlighter)?.let { LensEventManager.addEvent(editor, LensEventData.MarkupModelAttributesChanged(Highlighter(highlighter, it))) }
+			showIfValid(highlighter)
+		} catch (e: Exception) {
+			InspectionLens.LOG.error("Error updating inspection", e)
+		}
 	}
 	
 	override fun beforeRemoved(highlighter: RangeHighlighterEx) {
-		if (getFilteredHighlightInfo(highlighter) != null) {
+		try {
-			lensManagerDispatcher.hide(highlighter)
+			val filteredHighlightInfo = getFilteredHighlightInfo(highlighter)
+			if (filteredHighlightInfo != null) {
+				LensEventManager.addEvent(editor, LensEventData.MarkupModelBeforeRemoved(Highlighter(highlighter, filteredHighlightInfo)))
+				lensManagerDispatcher.hide(highlighter)
+			}
+		} catch (e: Exception) {
+			InspectionLens.LOG.error("Error hiding inspection", e)
 		}
 	}
 	

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/lens/EditorLens.kt

@@ -4,15 +4,18 @@ import com.chylex.intellij.inspectionlens.settings.LensSettingsState
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.openapi.editor.Editor
 
-internal class EditorLens private constructor(private var inlay: EditorLensInlay, private var lineBackground: EditorLensLineBackground) {
+internal class EditorLens private constructor(private var inlay: EditorLensInlay, private var lineBackground: EditorLensLineBackground, private var severity: LensSeverity) {
 	fun update(info: HighlightInfo, settings: LensSettingsState): Boolean {
 		val editor = inlay.editor
+		val oldSeverity = severity
+		
+		severity = LensSeverity.from(info.severity)
 		
 		if (!inlay.tryUpdate(info)) {
 			inlay = EditorLensInlay.show(editor, info, settings) ?: return false
 		}
 		
-		if (lineBackground.shouldRecreate(info)) {
+		if (lineBackground.isInvalid || oldSeverity != severity) {
 			lineBackground.hide(editor)
 			lineBackground = EditorLensLineBackground.show(editor, info)
 		}
@@ -20,18 +23,25 @@ internal class EditorLens private constructor(private var inlay: EditorLensInlay
 		return true
 	}
 	
-	fun hide() {
+	fun onFoldRegionsChanged() {
-		val editor = inlay.editor
+		lineBackground.onFoldRegionsChanged(inlay.editor, severity)
+	}
 	
+	fun hide() {
 		inlay.hide()
-		lineBackground.hide(editor)
+		lineBackground.hide(inlay.editor)
+	}
+	
+	override fun toString(): String {
+		return "$inlay"
 	}
 	
 	companion object {
 		fun show(editor: Editor, info: HighlightInfo, settings: LensSettingsState): EditorLens? {
 			val inlay = EditorLensInlay.show(editor, info, settings) ?: return null
 			val lineBackground = EditorLensLineBackground.show(editor, info)
-			return EditorLens(inlay, lineBackground)
+			val severity = LensSeverity.from(info.severity)
+			return EditorLens(inlay, lineBackground, severity)
 		}
 	}
 }

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/lens/EditorLensInlay.kt

@@ -36,7 +36,9 @@ internal value class EditorLensInlay(private val inlay: Inlay<LensRenderer>) {
 				.disableSoftWrapping(true)
 				.priority(priority)
 			
-			return editor.inlayModel.addAfterLineEndElement(offset, properties, renderer)?.let(::EditorLensInlay)
+			return editor.inlayModel.addAfterLineEndElement(offset, properties, renderer)
+				?.also(renderer::setInlay)
+				?.let(::EditorLensInlay)
 		}
 		
 		/**

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/lens/EditorLensLineBackground.kt

@@ -2,33 +2,21 @@ package com.chylex.intellij.inspectionlens.editor.lens
 
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.editor.ex.RangeHighlighterEx
 import com.intellij.openapi.editor.markup.HighlighterLayer
 import com.intellij.openapi.editor.markup.HighlighterTargetArea.LINES_IN_RANGE
 import com.intellij.openapi.editor.markup.RangeHighlighter
+import com.intellij.openapi.editor.markup.TextAttributes
 
 @JvmInline
 internal value class EditorLensLineBackground(private val highlighter: RangeHighlighter) {
-	@Suppress("RedundantIf")
+	val isInvalid
-	fun shouldRecreate(info: HighlightInfo): Boolean {
+		get() = !highlighter.isValid
-		if (!highlighter.isValid) {
+	
-			return true
+	fun onFoldRegionsChanged(editor: Editor, severity: LensSeverity) {
+		if (highlighter is RangeHighlighterEx) {
+			highlighter.textAttributes = getAttributes(editor, highlighter.startOffset, highlighter.endOffset, severity)
 		}
-		
-		val severity = LensSeverity.from(info.severity)
-		
-		val currentTextAttributes = highlighter.getTextAttributes(null)
-		val newTextAttributes = severity.lineAttributes
-		if (currentTextAttributes !== newTextAttributes) {
-			return true
-		}
-		
-		val currentLayer = highlighter.layer
-		val newLayer = getHighlightLayer(severity)
-		if (currentLayer != newLayer) {
-			return true
-		}
-		
-		return false
 	}
 	
 	fun hide(editor: Editor) {
@@ -42,12 +30,20 @@ internal value class EditorLensLineBackground(private val highlighter: RangeHigh
 			
 			val severity = LensSeverity.from(info.severity)
 			val layer = getHighlightLayer(severity)
+			val attributes = getAttributes(editor, startOffset, endOffset, severity)
 			
-			return EditorLensLineBackground(editor.markupModel.addRangeHighlighter(startOffset, endOffset, layer, severity.lineAttributes, LINES_IN_RANGE))
+			return EditorLensLineBackground(editor.markupModel.addRangeHighlighter(startOffset, endOffset, layer, attributes, LINES_IN_RANGE))
 		}
 		
 		private fun getHighlightLayer(severity: LensSeverity): Int {
 			return HighlighterLayer.CARET_ROW - 100 - severity.ordinal
 		}
+		
+		private fun getAttributes(editor: Editor, startOffset: Int, endOffset: Int, severity: LensSeverity): TextAttributes? {
+			return if (editor.foldingModel.let { it.isOffsetCollapsed(startOffset) || it.isOffsetCollapsed(endOffset) })
+				null
+			else
+				severity.lineAttributes
+		}
 	}
 }

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/lens/IntentionsPopup.kt

@@ -0,0 +1,58 @@
+package com.chylex.intellij.inspectionlens.editor.lens
+
+import com.intellij.codeInsight.daemon.impl.IntentionsUI
+import com.intellij.codeInsight.hint.HintManager
+import com.intellij.codeInsight.intention.impl.ShowIntentionActionsHandler
+import com.intellij.lang.LangBundle
+import com.intellij.openapi.actionSystem.ActionManager
+import com.intellij.openapi.actionSystem.ActionPlaces
+import com.intellij.openapi.actionSystem.IdeActions
+import com.intellij.openapi.actionSystem.ex.ActionUtil
+import com.intellij.openapi.editor.Editor
+import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiDocumentManager
+import com.intellij.psi.PsiFile
+import com.intellij.psi.util.PsiUtilBase
+
+internal object IntentionsPopup {
+	fun show(editor: Editor) {
+		if (!tryShow(editor)) {
+			HintManager.getInstance().showInformationHint(editor, LangBundle.message("hint.text.no.context.actions.available.at.this.location"))
+		}
+	}
+	
+	private fun tryShow(editor: Editor): Boolean {
+		// If the IDE uses the default Show Intentions action and handler,
+		// use the handler directly to bypass additional logic from the action.
+		val action = ActionManager.getInstance().getAction(IdeActions.ACTION_SHOW_INTENTION_ACTIONS)
+		if (action.javaClass.name === DEFAULT_ACTION_CLASS) {
+			return tryShowWithDefaultHandler(editor)
+		}
+		else {
+			ActionUtil.invokeAction(action, editor.component, ActionPlaces.EDITOR_INLAY, null, null)
+			return true
+		}
+	}
+	
+	private fun tryShowWithDefaultHandler(editor: Editor): Boolean {
+		val project = editor.project ?: return false
+		val file = PsiUtilBase.getPsiFileInEditor(editor, project) ?: return false
+		
+		PsiDocumentManager.getInstance(project).commitAllDocuments()
+		IntentionsUI.getInstance(project).hide()
+		
+		HANDLER.showIntentionHint(project, editor, file, showFeedbackOnEmptyMenu = true)
+		return true
+	}
+	
+	/**
+	 * New IDEA versions mark this class as internal, so the plugin verifier flags references to it as errors.
+	 */
+	const val DEFAULT_ACTION_CLASS = "com.intellij.codeInsight.intention.actions.ShowIntentionActionsAction"
+	
+	private val HANDLER = object : ShowIntentionActionsHandler() {
+		public override fun showIntentionHint(project: Project, editor: Editor, file: PsiFile, showFeedbackOnEmptyMenu: Boolean) {
+			super.showIntentionHint(project, editor, file, showFeedbackOnEmptyMenu)
+		}
+	}
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/editor/lens/LensRenderer.kt

@@ -1,63 +1,199 @@
 package com.chylex.intellij.inspectionlens.editor.lens
 
+import com.chylex.intellij.inspectionlens.settings.LensHoverMode
 import com.chylex.intellij.inspectionlens.settings.LensSettingsState
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.codeInsight.daemon.impl.HintRenderer
+import com.intellij.codeInsight.hints.presentation.InputHandler
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.Inlay
+import com.intellij.openapi.editor.ScrollType
+import com.intellij.openapi.editor.colors.EditorFontType
+import com.intellij.openapi.editor.ex.EditorEx
+import com.intellij.openapi.editor.impl.EditorImpl
 import com.intellij.openapi.editor.markup.TextAttributes
 import com.intellij.openapi.util.text.StringUtil
+import com.intellij.ui.paint.EffectPainter
+import java.awt.Cursor
 import java.awt.Graphics
+import java.awt.Graphics2D
+import java.awt.MouseInfo
+import java.awt.Point
 import java.awt.Rectangle
+import java.awt.event.MouseEvent
+import java.util.regex.Pattern
+import javax.swing.SwingUtilities
 
 /**
  * Renders the text of an inspection lens.
  */
-class LensRenderer(info: HighlightInfo, settings: LensSettingsState) : HintRenderer(null) {
+class LensRenderer(private var info: HighlightInfo, private val settings: LensSettingsState) : HintRenderer(null), InputHandler {
-	private val useEditorFont = settings.useEditorFont
+	private lateinit var inlay: Inlay<*>
-	private lateinit var severity: LensSeverity
+	private lateinit var attributes: LensSeverityTextAttributes
+	private var extraRightPadding = 0
+	private var hovered = false
 	
 	init {
 		setPropertiesFrom(info)
 	}
 	
+	fun setInlay(inlay: Inlay<*>) {
+		check(!this::inlay.isInitialized) { "Inlay already set" }
+		this.inlay = inlay
+	}
+	
 	fun setPropertiesFrom(info: HighlightInfo) {
-		text = getValidDescriptionText(info.description)
+		this.info = info
-		severity = LensSeverity.from(info.severity)
+		val description = getValidDescriptionText(info.description, settings.maxDescriptionLength)
+		
+		text = description
+		attributes = LensSeverity.from(info.severity).textAttributes
+		extraRightPadding = if (description.lastOrNull() == '.') 2 else 0
 	}
 	
 	override fun paint(inlay: Inlay<*>, g: Graphics, r: Rectangle, textAttributes: TextAttributes) {
 		fixBaselineForTextRendering(r)
 		super.paint(inlay, g, r, textAttributes)
+		
+		if (hovered && isHoveringText()) {
+			paintHoverEffect(inlay, g, r)
+		}
+	}
+	
+	private fun paintHoverEffect(inlay: Inlay<*>, g: Graphics, r: Rectangle) {
+		val editor = inlay.editor
+		if (editor !is EditorImpl) {
+			return
+		}
+		
+		val font = editor.colorsScheme.getFont(EditorFontType.PLAIN)
+		val x = r.x + TEXT_HORIZONTAL_PADDING
+		val y = r.y + editor.ascent
+		val w = inlay.widthInPixels - UNDERLINE_WIDTH_REDUCTION - extraRightPadding
+		val h = editor.descent
+		
+		g.color = attributes.foregroundColor
+		EffectPainter.LINE_UNDERSCORE.paint(g as Graphics2D, x, y, w, h, font)
 	}
 	
 	override fun getTextAttributes(editor: Editor): TextAttributes {
-		return severity.textAttributes
+		return attributes
 	}
 	
 	override fun useEditorFont(): Boolean {
-		return useEditorFont
+		return settings.useEditorFont
+	}
+	
+	override fun mouseMoved(event: MouseEvent, translated: Point) {
+		setHovered(isHoveringText(translated))
+	}
+	
+	override fun mouseExited() {
+		setHovered(false)
+	}
+	
+	private fun setHovered(hovered: Boolean) {
+		if (hovered && settings.lensHoverMode == LensHoverMode.DISABLED) {
+			return
+		}
+		
+		if (this.hovered == hovered) {
+			return
+		}
+		
+		this.hovered = hovered
+		
+		val editor = inlay.editor
+		if (editor is EditorEx) {
+			val cursor = if (hovered) Cursor.getPredefinedCursor(Cursor.HAND_CURSOR) else null
+			editor.setCustomCursor(this::class.java, cursor)
+		}
+		
+		inlay.repaint()
+	}
+	
+	override fun mousePressed(event: MouseEvent, translated: Point) {
+		val hoverMode = settings.lensHoverMode
+		if (hoverMode == LensHoverMode.DISABLED || !isHoveringText(translated)) {
+			return
+		}
+		
+		if (event.button.let { it == MouseEvent.BUTTON1 || it == MouseEvent.BUTTON2 }) {
+			event.consume()
+			
+			val editor = inlay.editor
+			moveToOffset(editor, info.actualStartOffset)
+			
+			if ((event.button == MouseEvent.BUTTON1) xor (hoverMode != LensHoverMode.DEFAULT)) {
+				IntentionsPopup.show(editor)
+			}
+		}
+	}
+	
+	private fun isHoveringText(): Boolean {
+		val bounds = inlay.bounds ?: return false
+		val translatedPoint = MouseInfo.getPointerInfo().location.apply {
+			SwingUtilities.convertPointFromScreen(this, inlay.editor.contentComponent)
+			translate(-bounds.x, -bounds.y)
+		}
+		
+		return isHoveringText(translatedPoint)
+	}
+	
+	private fun isHoveringText(point: Point): Boolean {
+		return point.x >= HOVER_HORIZONTAL_PADDING
+			&& point.y >= 4
+			&& point.x < inlay.widthInPixels - HOVER_HORIZONTAL_PADDING - extraRightPadding
+			&& point.y < inlay.heightInPixels - 1
 	}
 	
 	private companion object {
-		private fun getValidDescriptionText(text: String?): String {
+		/**
-			return if (text.isNullOrBlank()) " " else addMissingPeriod(unescapeHtmlEntities(text))
+		 * [HintRenderer.paintHint] renders padding around text, but not around effects.
+		 */
+		private const val TEXT_HORIZONTAL_PADDING = 7
+		private const val HOVER_HORIZONTAL_PADDING = TEXT_HORIZONTAL_PADDING - 2
+		private const val UNDERLINE_WIDTH_REDUCTION = (TEXT_HORIZONTAL_PADDING * 2) - 1
+		
+		/**
+		 * Kotlin compiler inspections have an `[UPPERCASE_TAG]` at the beginning.
+		 */
+		private val UPPERCASE_TAG_REGEX = Pattern.compile("^\\[[A-Z_]+] ")
+		
+		private fun getValidDescriptionText(text: String?, maxLength: Int): String {
+			return if (text.isNullOrBlank()) " " else addEllipsisOrMissingPeriod(unescapeHtmlEntities(stripUppercaseTag(text)), maxLength)
 		}
 		
-		private fun unescapeHtmlEntities(potentialHtml: String): String {
+		private fun stripUppercaseTag(text: String): String {
-			return potentialHtml.ifContains('&', StringUtil::unescapeXmlEntities)
+			if (text.startsWith('[')) {
+				val matcher = UPPERCASE_TAG_REGEX.matcher(text)
+				if (matcher.find()) {
+					return text.substring(matcher.end())
+				}
+			}
+			
+			return text
 		}
 		
-		private fun addMissingPeriod(text: String): String {
+		private fun unescapeHtmlEntities(text: String): String {
-			return if (text.endsWith('.')) text else "$text."
+			return if (text.contains('&')) StringUtil.unescapeXmlEntities(text) else text
 		}
 		
-		private inline fun String.ifContains(charToTest: Char, action: (String) -> String): String {
+		private fun addEllipsisOrMissingPeriod(text: String, maxLength: Int): String {
-			return if (this.contains(charToTest)) action(this) else this
+			return when {
+				text.length > maxLength -> text.take(maxLength).trimEnd { it.isWhitespace() || it == '.' } + "…"
+				!text.endsWith('.')     -> "$text."
+				else                    -> text
+			}
 		}
 		
 		private fun fixBaselineForTextRendering(rect: Rectangle) {
 			rect.y += 1
 		}
+		
+		private fun moveToOffset(editor: Editor, offset: Int) {
+			editor.caretModel.moveToOffset(offset)
+			editor.scrollingModel.scrollToCaret(ScrollType.MAKE_VISIBLE)
+		}
 	}
 }

src/main/kotlin/com/chylex/intellij/inspectionlens/settings/LensApplicationConfigurable.kt

@@ -10,14 +10,18 @@ import com.intellij.openapi.editor.markup.TextAttributes
 import com.intellij.openapi.options.BoundConfigurable
 import com.intellij.openapi.options.ConfigurableWithId
 import com.intellij.openapi.ui.DialogPanel
+import com.intellij.openapi.ui.MessageDialogBuilder
 import com.intellij.openapi.util.Disposer
 import com.intellij.ui.DisabledTraversalPolicy
 import com.intellij.ui.EditorTextFieldCellRenderer.SimpleRendererComponent
+import com.intellij.ui.SimpleListCellRenderer
 import com.intellij.ui.components.JBCheckBox
 import com.intellij.ui.dsl.builder.Cell
 import com.intellij.ui.dsl.builder.RightGap
 import com.intellij.ui.dsl.builder.Row
 import com.intellij.ui.dsl.builder.RowLayout
+import com.intellij.ui.dsl.builder.bindIntText
+import com.intellij.ui.dsl.builder.bindItem
 import com.intellij.ui.dsl.builder.bindSelected
 import com.intellij.ui.dsl.builder.panel
 import java.awt.Cursor
@@ -73,7 +77,26 @@ class LensApplicationConfigurable : BoundConfigurable("Inspection Lens"), Config
 	override fun createPanel(): DialogPanel {
 		val settings = settingsService.state
 		
-		return panel {
+		lateinit var panel: DialogPanel
+		
+		panel = panel {
+			group("Appearance") {
+				row {
+					checkBox("Use editor font").bindSelected(settings::useEditorFont)
+				}
+				row("Max description length:") {
+					intTextField(LensSettingsState.MAX_DESCRIPTION_LENGTH_RANGE, keyboardStep = 10).bindIntText(settings::maxDescriptionLength)
+				}
+			}
+			
+			group("Behavior") {
+				row("Hover mode:") {
+					val items = LensHoverMode.entries
+					val renderer = SimpleListCellRenderer.create("", LensHoverMode::description)
+					comboBox(items, renderer).bindItem(settings::lensHoverMode) { settings.lensHoverMode = it ?: LensHoverMode.DEFAULT }
+				}
+			}
+			
 			group("Shown Severities") {
 				for ((id, severity, textAttributes) in allSeverities) {
 					row {
@@ -90,12 +113,19 @@ class LensApplicationConfigurable : BoundConfigurable("Inspection Lens"), Config
 				}
 			}
 			
-			group("Appearance") {
+			group("Actions") {
 				row {
-					checkBox("Use editor font").bindSelected(settings::useEditorFont)
+					button("Reset to Default") {
+						if (MessageDialogBuilder.yesNo("Reset to Default", "Are you sure you want to reset settings to default?").ask(panel)) {
+							settingsService.resetState()
+							reset()
+						}
+					}
 				}
 			}
 		}
+		
+		return panel
 	}
 	
 	private fun <K, V> Cell<JBCheckBox>.bindSelectedToNotIn(collection: MutableMap<K, V>, key: K, value: V): Cell<JBCheckBox> {

src/main/kotlin/com/chylex/intellij/inspectionlens/settings/LensHoverMode.kt

@@ -0,0 +1,7 @@
+package com.chylex.intellij.inspectionlens.settings
+
+enum class LensHoverMode(val description: String) {
+	DISABLED("Disabled"),
+	DEFAULT("Left click shows intentions, middle click jumps to highlight"),
+	SWAPPED("Left click jumps to highlight, middle click shows intentions")
+}

src/main/kotlin/com/chylex/intellij/inspectionlens/settings/LensSettingsState.kt

@@ -21,6 +21,12 @@ class LensSettingsState : SimplePersistentStateComponent<LensSettingsState.State
 		
 		var showUnknownSeverities by property(true)
 		var useEditorFont by property(true)
+		var maxDescriptionLength by property(120)
+		var lensHoverMode by enum(LensHoverMode.DEFAULT)
+	}
+	
+	companion object {
+		val MAX_DESCRIPTION_LENGTH_RANGE = 20..1000
 	}
 	
 	@get:Synchronized
@@ -31,8 +37,27 @@ class LensSettingsState : SimplePersistentStateComponent<LensSettingsState.State
 	val useEditorFont
 		get() = state.useEditorFont
 	
+	val maxDescriptionLength
+		get() = state.maxDescriptionLength
+	
+	val lensHoverMode
+		get() = state.lensHoverMode
+	
 	override fun loadState(state: State) {
 		super.loadState(state)
+		state.maxDescriptionLength = state.maxDescriptionLength.coerceIn(MAX_DESCRIPTION_LENGTH_RANGE)
+		update()
+	}
+	
+	fun resetState() {
+		val default = State()
+		
+		state.hiddenSeverities.apply { clear(); putAll(default.hiddenSeverities) }
+		state.showUnknownSeverities = default.showUnknownSeverities
+		state.useEditorFont = default.useEditorFont
+		state.maxDescriptionLength = default.maxDescriptionLength
+		state.lensHoverMode = default.lensHoverMode
+		
 		update()
 	}
 	

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

@@ -6,12 +6,34 @@
   <description><![CDATA[
     Displays errors, warnings, and other inspections inline. Highlights the background of lines with inspections. Supports light and dark themes out of the box.
     <br><br>
-    By default, the plugin shows <b>Errors</b>, <b>Warnings</b>, <b>Weak Warnings</b>, <b>Server Problems</b>, <b>Grammar Errors</b>, <b>Typos</b>, and other inspections with a high enough severity level. Configure visible severities in <b>Settings | Tools | Inspection Lens</a>.
+    By default, the plugin shows <b>Errors</b>, <b>Warnings</b>, <b>Weak Warnings</b>, <b>Server Problems</b>, <b>Grammar Errors</b>, <b>Typos</b>, and other inspections with a high enough severity level. Left-click an inspection to show quick fixes. Middle-click an inspection to navigate to the relevant code in the editor.
+    <br><br>
+    Configure appearance, behavior of clicking on inspections, and visible severities in <b>Settings | Tools | Inspection Lens</b>.
     <br><br>
     Inspired by <a href="https://marketplace.visualstudio.com/items?itemName=usernamehw.errorlens">Error Lens</a> for VS Code, and <a href="https://plugins.jetbrains.com/plugin/17302-inlineerror">Inline Error</a> for IntelliJ Platform.
   ]]></description>
   
   <change-notes><![CDATA[
+    <b>Version 1.5.2</b>
+    <ul>
+      <li>Added option to change maximum description length.</li>
+      <li>Added button to <b>Settings | Tools | Inspection Lens</b> that resets all settings to default.</li>
+    </ul>
+    <b>Version 1.5.1</b>
+    <ul>
+      <li>Added option to change the behavior of clicking on inspections.</li>
+      <li>Fixed broken quick fixes in Rider and CLion Nova.</li>
+      <li>Fixed hover underline not rendering correctly with some combinations of high DPI and line height settings.</li>
+    </ul>
+    <b>Version 1.5</b>
+    <ul>
+      <li>Added possibility to left-click an inspection to show quick fixes.</li>
+      <li>Added possibility to middle-click an inspection to navigate to relevant code in the editor.</li>
+      <li>Added option to use UI font instead of editor font.</li>
+      <li>Long inspection descriptions are now truncated to 120 characters.</li>
+      <li>Improved descriptions of Kotlin compiler inspections.</li>
+      <li>Fixed visual artifacts in Rendered Doc comments.</li>
+    </ul>
     <b>Version 1.4.1</b>
     <ul>
       <li>Fixed warnings in usage of IntelliJ SDK.</li>

src/test/kotlin/com/chylex/intellij/inspectionlens/editor/lens/IntentionsPopupTest.kt

@@ -0,0 +1,12 @@
+package com.chylex.intellij.inspectionlens.editor.lens
+
+import com.intellij.codeInsight.intention.actions.ShowIntentionActionsAction
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class IntentionsPopupTest {
+	@Test
+	fun showIntentionActionsActionClassHasNotChanged() {
+		assertEquals(IntentionsPopup.DEFAULT_ACTION_CLASS, ShowIntentionActionsAction::class.java.name)
+	}
+}