Debug logs

Closes #34

.github/FUNDING.yml

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

.gitignore

@@ -1,5 +1,7 @@
 /.idea/*
+!/.idea/dictionaries
 !/.idea/runConfigurations
 
 /.gradle/
+/.intellijPlatform/
 /build/

.idea/dictionaries/default_user.xml

@@ -0,0 +1,7 @@
+<component name="ProjectDictionaryState">
+  <dictionary name="default.user">
+    <words>
+      <w>inspectionlens</w>
+    </words>
+  </dictionary>
+</component>

README.md

@@ -1,10 +1,10 @@
 # Inspection Lens <img align="right" src="logo.png" alt="Plugin Logo">
 
-IntelliJ plugin that shows errors, warnings, and other inspection highlights inline.
+Displays errors, warnings, and other inspections inline. Highlights the background of lines with inspections. Supports light and dark themes out of the box.
 
-After installing the plugin, inspection descriptions will appear after the ends of lines, and the lines will be highlighted with a background color. Shown inspection severities are **Errors**, **Warnings**, **Weak Warnings**, **Server Problems**, **Grammar Errors**, **Typos**, and other inspections from plugins or future IntelliJ versions that have a high enough severity level. Each severity has a different color, with support for both light and dark themes.
+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.
 
-Note: The plugin is not customizable outside the ability to disable/enable the plugin without restarting the IDE. If the defaults don't work for you, I recommend trying the [Inline Error](https://plugins.jetbrains.com/plugin/17302-inlineerror) plugin which can be customized, building your own version of Inspection Lens, or proposing your change in the [issue tracker](https://github.com/chylex/IntelliJ-Inspection-Lens/issues).
+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"
-	id("org.jetbrains.intellij") version "1.17.0"
+	kotlin("jvm")
+	id("org.jetbrains.intellij.platform")
 }
 
 group = "com.chylex.intellij.inspectionlens"
-version = "1.3.2"
+version = "1.5.2.902"
 
 repositories {
 	mavenCentral()
+	
+	intellijPlatform {
+		defaultRepositories()
+	}
 }
 
-intellij {
-	version.set("2023.3.3")
-	updateSinceUntilBuild.set(false)
+dependencies {
+	intellijPlatform {
+		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 {
-	testImplementation("org.junit.jupiter:junit-jupiter:5.9.2")
-}
-
-tasks.patchPluginXml {
-	sinceBuild.set("233.11361.10")
-}
-
-tasks.buildSearchableOptions {
-	enabled = false
+	
+	compilerOptions {
+		freeCompilerArgs = listOf(
+			"-X" + "jvm-default=all",
+			"-X" + "lambdas=indy"
+		)
+	}
 }
 
 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 ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+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 ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+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

@@ -1,15 +1,12 @@
 package com.chylex.intellij.inspectionlens
 
-import com.chylex.intellij.inspectionlens.editor.EditorLensManager
-import com.chylex.intellij.inspectionlens.editor.LensMarkupModelListener
-import com.intellij.openapi.Disposable
+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
-import com.intellij.openapi.rd.createLifetime
-import com.intellij.openapi.rd.createNestedDisposable
-import com.jetbrains.rd.util.lifetime.Lifetime
 
 /**
  * Handles installation and uninstallation of plugin features in editors.
@@ -17,11 +14,13 @@ import com.jetbrains.rd.util.lifetime.Lifetime
 internal object InspectionLens {
 	const val PLUGIN_ID = "com.chylex.intellij.inspectionlens"
 	
+	val LOG = logger<InspectionLens>()
+	
 	/**
 	 * Installs lenses into [editor].
 	 */
 	fun install(editor: TextEditor) {
-		LensMarkupModelListener.register(editor.editor, createEditorDisposable(editor))
+		EditorLensFeatures.install(editor.editor, service<InspectionLensPluginDisposableService>().intersect(editor))
 	}
 	
 	/**
@@ -31,31 +30,20 @@ internal object InspectionLens {
 		forEachOpenEditor(::install)
 	}
 	
-	/**
-	 * Uninstalls lenses from all open editors.
-	 */
-	fun uninstall() {
-		forEachOpenEditor {
-			EditorLensManager.remove(it.editor)
-		}
-	}
-	
 	/**
 	 * Refreshes lenses in all open editors.
 	 */
-	fun refresh() {
+	private fun refresh() {
 		forEachOpenEditor {
-			LensMarkupModelListener.refresh(it.editor)
+			EditorLensFeatures.refresh(it.editor)
 		}
 	}
 	
 	/**
-	 * Creates a [Disposable] that will be disposed when either the [TextEditor] is disposed or the plugin is unloaded.
+	 * Schedules a refresh of lenses in all open editors.
 	 */
-	private fun createEditorDisposable(textEditor: TextEditor): Disposable {
-		val pluginLifetime = ApplicationManager.getApplication().getService(InspectionLensPluginDisposableService::class.java).createLifetime()
-		val editorLifetime = textEditor.createLifetime()
-		return Lifetime.intersect(pluginLifetime, editorLifetime).createNestedDisposable("InspectionLensIntersectedLifetime")
+	fun scheduleRefresh() {
+		Refresh.schedule()
 	}
 	
 	/**
@@ -70,4 +58,26 @@ internal object InspectionLens {
 			}
 		}
 	}
+	
+	private object Refresh {
+		private var needsRefresh = false
+		
+		fun schedule() {
+			synchronized(this) {
+				if (!needsRefresh) {
+					needsRefresh = true
+					ApplicationManager.getApplication().invokeLater(this::run)
+				}
+			}
+		}
+		
+		private fun run() {
+			synchronized(this) {
+				if (needsRefresh) {
+					needsRefresh = false
+					refresh()
+				}
+			}
+		}
+	}
 }

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/InspectionLensPluginDisposableService.kt

@@ -2,11 +2,21 @@ package com.chylex.intellij.inspectionlens
 
 import com.intellij.openapi.Disposable
 import com.intellij.openapi.components.Service
+import com.intellij.openapi.rd.createLifetime
+import com.intellij.openapi.rd.createNestedDisposable
+import com.jetbrains.rd.util.lifetime.Lifetime
 
 /**
  * Gets automatically disposed when the plugin is unloaded.
  */
 @Service
 class InspectionLensPluginDisposableService : Disposable {
+	/**
+	 * Creates a [Disposable] that will be disposed when either plugin is unloaded, or the [other] [Disposable] is disposed.
+	 */
+	fun intersect(other: Disposable): Disposable {
+		return Lifetime.intersect(createLifetime(), other.createLifetime()).createNestedDisposable("InspectionLensIntersectedLifetime")
+	}
+	
 	override fun dispose() {}
 }

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

@@ -4,7 +4,7 @@ import com.intellij.ide.plugins.DynamicPluginListener
 import com.intellij.ide.plugins.IdeaPluginDescriptor
 
 /**
- * Installs [InspectionLens] in open editors when the plugin is loaded, and uninstalls it when the plugin is unloaded.
+ * Installs [InspectionLens] in open editors when the plugin is loaded.
  */
 class InspectionLensPluginListener : DynamicPluginListener {
 	override fun pluginLoaded(pluginDescriptor: IdeaPluginDescriptor) {
@@ -12,10 +12,4 @@ class InspectionLensPluginListener : DynamicPluginListener {
 			InspectionLens.install()
 		}
 	}
-	
-	override fun beforePluginUnload(pluginDescriptor: IdeaPluginDescriptor, isUpdate: Boolean) {
-		if (pluginDescriptor.pluginId.idString == InspectionLens.PLUGIN_ID) {
-			InspectionLens.uninstall()
-		}
-	}
 }

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

@@ -1,25 +0,0 @@
-package com.chylex.intellij.inspectionlens
-
-import com.intellij.openapi.application.ApplicationManager
-
-object InspectionLensRefresher {
-	private var needsRefresh = false
-	
-	fun scheduleRefresh() {
-		synchronized(this) {
-			if (!needsRefresh) {
-				needsRefresh = true
-				ApplicationManager.getApplication().invokeLater(::refresh)
-			}
-		}
-	}
-	
-	private fun refresh() {
-		synchronized(this) {
-			if (needsRefresh) {
-				needsRefresh = false
-				InspectionLens.refresh()
-			}
-		}
-	}
-}

src/main/kotlin/com/chylex/intellij/inspectionlens/compatibility/GrazieSupport.kt

@@ -1,6 +1,6 @@
 package com.chylex.intellij.inspectionlens.compatibility
 
-import com.chylex.intellij.inspectionlens.editor.LensSeverity
+import com.chylex.intellij.inspectionlens.editor.lens.LensSeverity
 import com.intellij.grazie.ide.TextProblemSeverities
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.startup.ProjectActivity

src/main/kotlin/com/chylex/intellij/inspectionlens/compatibility/SpellCheckerSupport.kt

@@ -0,0 +1,23 @@
+package com.chylex.intellij.inspectionlens.compatibility
+
+import com.chylex.intellij.inspectionlens.editor.lens.LensSeverity
+import com.intellij.lang.annotation.HighlightSeverity
+import com.intellij.openapi.diagnostic.logger
+import com.intellij.profile.codeInspection.InspectionProfileManager
+import com.intellij.spellchecker.SpellCheckerSeveritiesProvider
+
+internal object SpellCheckerSupport {
+	private val log = logger<SpellCheckerSupport>()
+	
+	fun load() {
+		typoSeverity?.let { LensSeverity.registerMapping(it, LensSeverity.TYPO) }
+	}
+	
+	private val typoSeverity: HighlightSeverity?
+		get() = try {
+			SpellCheckerSeveritiesProvider.TYPO
+		} catch (e: NoClassDefFoundError) {
+			log.warn("Falling back to registered severity search due to ${e.javaClass.simpleName}: ${e.message}")
+			InspectionProfileManager.getInstance().severityRegistrar.getSeverity("TYPO")
+		}
+}

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/EditorLens.kt

@@ -1,36 +0,0 @@
-package com.chylex.intellij.inspectionlens.editor
-
-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) {
-	fun update(info: HighlightInfo): Boolean {
-		val editor = inlay.editor
-		
-		if (!inlay.tryUpdate(info)) {
-			inlay = EditorLensInlay.show(editor, info) ?: return false
-		}
-		
-		if (lineBackground.shouldRecreate(info)) {
-			lineBackground.hide(editor)
-			lineBackground = EditorLensLineBackground.show(editor, info)
-		}
-		
-		return true
-	}
-	
-	fun hide() {
-		val editor = inlay.editor
-		
-		inlay.hide()
-		lineBackground.hide(editor)
-	}
-	
-	companion object {
-		fun show(editor: Editor, info: HighlightInfo): EditorLens? {
-			val inlay = EditorLensInlay.show(editor, info) ?: return null
-			val lineBackground = EditorLensLineBackground.show(editor, info)
-			return EditorLens(inlay, lineBackground)
-		}
-	}
-}

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

@@ -0,0 +1,66 @@
+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
+import com.intellij.openapi.util.Key
+
+/**
+ * Manages Inspection Lens features for a single [Editor].
+ */
+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(editor, lensManagerDispatcher)
+	
+	init {
+		markupModel.addMarkupModelListener(disposable, markupModelListener)
+		markupModelListener.showAllValid(markupModel.allHighlighters)
+		
+		foldingModel?.addListener(LensFoldingModelListener(lensManager), disposable)
+	}
+	
+	private fun refresh() {
+		markupModelListener.hideAll()
+		markupModelListener.showAllValid(markupModel.allHighlighters)
+	}
+	
+	companion object {
+		private val EDITOR_KEY = Key<EditorLensFeatures>(EditorLensFeatures::class.java.name)
+		
+		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 foldingModel = editor.foldingModel as? FoldingModelEx
+			val features = EditorLensFeatures(editor, markupModel, foldingModel, disposable)
+			
+			editor.putUserData(EDITOR_KEY, features)
+			
+			Disposer.register(disposable) {
+				InspectionLens.LOG.info("Installation disposed: $editor", Exception("DISPOSE STACK TRACE"))
+				editor.putUserData(EDITOR_KEY, null)
+			}
+		}
+		
+		fun refresh(editor: Editor) {
+			val userData = editor.getUserData(EDITOR_KEY)
+			InspectionLens.LOG.info("Refreshing: $editor ($userData)")
+			userData?.refresh()
+		}
+	}
+}

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

@@ -1,31 +1,23 @@
 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
-import com.intellij.openapi.util.Key
 import java.util.IdentityHashMap
 
 /**
  * Manages visible inspection lenses for an [Editor].
  */
-class EditorLensManager private constructor(private val editor: Editor) {
-	companion object {
-		private val EDITOR_KEY = Key<EditorLensManager>(EditorLensManager::class.java.name)
-		
-		fun getOrCreate(editor: Editor): EditorLensManager {
-			return editor.getUserData(EDITOR_KEY) ?: EditorLensManager(editor).also { editor.putUserData(EDITOR_KEY, it) }
-		}
-		
-		fun remove(editor: Editor) {
-			val manager = editor.getUserData(EDITOR_KEY)
-			if (manager != null) {
-				manager.hideAll()
-				editor.putUserData(EDITOR_KEY, null)
-			}
-		}
-	}
-	
+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
@@ -36,14 +28,14 @@ class EditorLensManager private constructor(private val editor: Editor) {
 		
 		val existingLens = lenses[highlighter]
 		if (existingLens != null) {
-			if (existingLens.update(info)) {
+			if (existingLens.update(info, settings)) {
 				return
 			}
 			
 			existingLens.hide()
 		}
 		
-		val newLens = EditorLens.show(editor, info)
+		val newLens = EditorLens.show(editor, info, settings)
 		if (newLens != null) {
 			lenses[highlighter] = newLens
 		}
@@ -69,6 +61,10 @@ class EditorLensManager private constructor(private val editor: Editor) {
 		}
 	}
 	
+	fun onFoldRegionsChanged() {
+		lenses.values.forEach(EditorLens::onFoldRegionsChanged)
+	}
+	
 	sealed interface Command {
 		fun apply(lensManager: EditorLensManager)
 		
@@ -83,6 +79,12 @@ class EditorLensManager private constructor(private val editor: Editor) {
 				lensManager.hide(highlighter)
 			}
 		}
+		
+		object HideAll : Command {
+			override fun apply(lensManager: EditorLensManager) {
+				lensManager.hideAll()
+			}
+		}
 	}
 	
 	/**

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

@@ -3,7 +3,7 @@ package com.chylex.intellij.inspectionlens.editor
 import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.editor.markup.RangeHighlighter
 
-class EditorLensManagerDispatcher(private val lensManager: EditorLensManager) {
+internal class EditorLensManagerDispatcher(private val lensManager: EditorLensManager) {
 	private var queuedItems = mutableListOf<EditorLensManager.Command>()
 	private var isEnqueued = false
 	
@@ -15,6 +15,10 @@ class EditorLensManagerDispatcher(private val lensManager: EditorLensManager) {
 		enqueue(EditorLensManager.Command.Hide(highlighter))
 	}
 	
+	fun hideAll() {
+		enqueue(EditorLensManager.Command.HideAll)
+	}
+	
 	private fun enqueue(item: EditorLensManager.Command) {
 		synchronized(this) {
 			queuedItems.add(item)

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

@@ -1,34 +1,50 @@
 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.lang.annotation.HighlightSeverity
-import com.intellij.openapi.Disposable
+import com.intellij.openapi.components.service
 import com.intellij.openapi.editor.Editor
-import com.intellij.openapi.editor.ex.MarkupModelEx
 import com.intellij.openapi.editor.ex.RangeHighlighterEx
-import com.intellij.openapi.editor.impl.DocumentMarkupModel
 import com.intellij.openapi.editor.impl.event.MarkupModelListener
 import com.intellij.openapi.editor.markup.RangeHighlighter
-import com.intellij.openapi.util.Disposer
-import com.intellij.openapi.util.Key
 
 /**
  * Listens for inspection highlights and reports them to [EditorLensManager].
  */
-internal class LensMarkupModelListener private constructor(editor: Editor) : MarkupModelListener {
-	private val lensManagerDispatcher = EditorLensManagerDispatcher(EditorLensManager.getOrCreate(editor))
+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) {
-			lensManagerDispatcher.hide(highlighter)
+		try {
+			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)
 		}
 	}
 	
@@ -44,64 +60,31 @@ internal class LensMarkupModelListener private constructor(editor: Editor) : Mar
 		}
 	}
 	
-	private fun showAllValid(highlighters: Array<RangeHighlighter>) {
+	fun showAllValid(highlighters: Array<RangeHighlighter>) {
 		highlighters.forEach(::showIfValid)
 	}
 	
-	companion object {
-		private val EDITOR_KEY = Key<LensMarkupModelListener>(LensMarkupModelListener::class.java.name)
-		private val MINIMUM_SEVERITY = HighlightSeverity.TEXT_ATTRIBUTES.myVal + 1
-		
-		private fun getFilteredHighlightInfo(highlighter: RangeHighlighter): HighlightInfo? {
-			return HighlightInfo.fromRangeHighlighter(highlighter)?.takeIf { it.severity.myVal >= MINIMUM_SEVERITY }
+	fun hideAll() {
+		lensManagerDispatcher.hideAll()
+	}
+	
+	private fun getFilteredHighlightInfo(highlighter: RangeHighlighter): HighlightInfo? {
+		return HighlightInfo.fromRangeHighlighter(highlighter)?.takeIf { settings.severityFilter.test(it.severity) }
+	}
+	
+	private inline fun runWithHighlighterIfValid(highlighter: RangeHighlighter, actionForImmediate: (HighlighterWithInfo) -> Unit, actionForAsync: (HighlighterWithInfo.Async) -> Unit) {
+		val info = highlighter.takeIf { it.isValid }?.let(::getFilteredHighlightInfo)
+		if (info != null) {
+			processHighlighterWithInfo(HighlighterWithInfo.from(highlighter, info), actionForImmediate, actionForAsync)
 		}
-		
-		private inline fun runWithHighlighterIfValid(highlighter: RangeHighlighter, actionForImmediate: (HighlighterWithInfo) -> Unit, actionForAsync: (HighlighterWithInfo.Async) -> Unit) {
-			val info = highlighter.takeIf { it.isValid }?.let(::getFilteredHighlightInfo)
-			if (info != null) {
-				processHighlighterWithInfo(HighlighterWithInfo.from(highlighter, info), actionForImmediate, actionForAsync)
-			}
+	}
+	
+	private inline fun processHighlighterWithInfo(highlighterWithInfo: HighlighterWithInfo, actionForImmediate: (HighlighterWithInfo) -> Unit, actionForAsync: (HighlighterWithInfo.Async) -> Unit) {
+		if (highlighterWithInfo is HighlighterWithInfo.Async) {
+			actionForAsync(highlighterWithInfo)
 		}
-		
-		private inline fun processHighlighterWithInfo(highlighterWithInfo: HighlighterWithInfo, actionForImmediate: (HighlighterWithInfo) -> Unit, actionForAsync: (HighlighterWithInfo.Async) -> Unit) {
-			if (highlighterWithInfo is HighlighterWithInfo.Async) {
-				actionForAsync(highlighterWithInfo)
-			}
-			else if (highlighterWithInfo.hasDescription) {
-				actionForImmediate(highlighterWithInfo)
-			}
-		}
-		
-		private fun getMarkupModel(editor: Editor): MarkupModelEx? {
-			return DocumentMarkupModel.forDocument(editor.document, editor.project, false) as? MarkupModelEx
-		}
-		
-		/**
-		 * Attaches a new [LensMarkupModelListener] to the [Editor], and reports all existing inspection highlights to [EditorLensManager].
-		 */
-		fun register(editor: Editor, disposable: Disposable) {
-			if (editor.getUserData(EDITOR_KEY) != null) {
-				return
-			}
-			
-			val markupModel = getMarkupModel(editor) ?: return
-			val listener = LensMarkupModelListener(editor)
-			
-			editor.putUserData(EDITOR_KEY, listener)
-			Disposer.register(disposable) { editor.putUserData(EDITOR_KEY, null) }
-			
-			markupModel.addMarkupModelListener(disposable, listener)
-			listener.showAllValid(markupModel.allHighlighters)
-		}
-		
-		/**
-		 * Recreates all inspection highlights in the [Editor].
-		 */
-		fun refresh(editor: Editor) {
-			val listener = editor.getUserData(EDITOR_KEY) ?: return
-			val markupModel = getMarkupModel(editor) ?: return
-			
-			listener.showAllValid(markupModel.allHighlighters)
+		else if (highlighterWithInfo.hasDescription) {
+			actionForImmediate(highlighterWithInfo)
 		}
 	}
 }

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

@@ -1,63 +0,0 @@
-package com.chylex.intellij.inspectionlens.editor
-
-import com.intellij.codeInsight.daemon.impl.HighlightInfo
-import com.intellij.codeInsight.daemon.impl.HintRenderer
-import com.intellij.openapi.editor.Editor
-import com.intellij.openapi.editor.Inlay
-import com.intellij.openapi.editor.markup.TextAttributes
-import com.intellij.openapi.util.text.StringUtil
-import java.awt.Graphics
-import java.awt.Rectangle
-
-/**
- * Renders the text of an inspection lens.
- */
-class LensRenderer(info: HighlightInfo) : HintRenderer(null) {
-	private lateinit var severity: LensSeverity
-	
-	init {
-		setPropertiesFrom(info)
-	}
-	
-	fun setPropertiesFrom(info: HighlightInfo) {
-		text = getValidDescriptionText(info.description)
-		severity = LensSeverity.from(info.severity)
-	}
-	
-	override fun paint(inlay: Inlay<*>, g: Graphics, r: Rectangle, textAttributes: TextAttributes) {
-		fixBaselineForTextRendering(r)
-		super.paint(inlay, g, r, textAttributes)
-	}
-	
-	override fun getTextAttributes(editor: Editor): TextAttributes {
-		return severity.textAttributes
-	}
-	
-	override fun useEditorFont(): Boolean {
-		return true
-	}
-	
-	private companion object {
-		private fun getValidDescriptionText(text: String?): String {
-			return if (text.isNullOrBlank()) " " else addMissingPeriod(convertHtmlToText(text))
-		}
-		
-		private fun convertHtmlToText(potentialHtml: String): String {
-			return potentialHtml
-				.ifContains('<') { StringUtil.stripHtml(it, " ") }
-				.ifContains('&', StringUtil::unescapeXmlEntities)
-		}
-		
-		private fun addMissingPeriod(text: String): String {
-			return if (text.endsWith('.')) text else "$text."
-		}
-		
-		private inline fun String.ifContains(charToTest: Char, action: (String) -> String): String {
-			return if (this.contains(charToTest)) action(this) else this
-		}
-		
-		private fun fixBaselineForTextRendering(rect: Rectangle) {
-			rect.y += 1
-		}
-	}
-}

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

@@ -0,0 +1,47 @@
+package com.chylex.intellij.inspectionlens.editor.lens
+
+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, 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.isInvalid || oldSeverity != severity) {
+			lineBackground.hide(editor)
+			lineBackground = EditorLensLineBackground.show(editor, info)
+		}
+		
+		return true
+	}
+	
+	fun onFoldRegionsChanged() {
+		lineBackground.onFoldRegionsChanged(inlay.editor, severity)
+	}
+	
+	fun hide() {
+		inlay.hide()
+		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)
+			val severity = LensSeverity.from(info.severity)
+			return EditorLens(inlay, lineBackground, severity)
+		}
+	}
+}

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

@@ -1,5 +1,6 @@
-package com.chylex.intellij.inspectionlens.editor
+package com.chylex.intellij.inspectionlens.editor.lens
 
+import com.chylex.intellij.inspectionlens.settings.LensSettingsState
 import com.intellij.codeInsight.daemon.impl.HighlightInfo
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.editor.Inlay
@@ -25,14 +26,19 @@ internal value class EditorLensInlay(private val inlay: Inlay<LensRenderer>) {
 	}
 	
 	companion object {
-		fun show(editor: Editor, info: HighlightInfo): EditorLensInlay? {
+		fun show(editor: Editor, info: HighlightInfo, settings: LensSettingsState): EditorLensInlay? {
 			val offset = getInlayHintOffset(info)
 			val priority = getInlayHintPriority(editor, info)
+			val renderer = LensRenderer(info, settings)
 			
-			val renderer = LensRenderer(info)
-			val properties = InlayProperties().relatesToPrecedingText(true).disableSoftWrapping(true).priority(priority)
+			val properties = InlayProperties()
+				.relatesToPrecedingText(true)
+				.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

@@ -1,34 +1,22 @@
-package com.chylex.intellij.inspectionlens.editor
+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")
-	fun shouldRecreate(info: HighlightInfo): Boolean {
-		if (!highlighter.isValid) {
-			return true
+	val isInvalid
+		get() = !highlighter.isValid
+	
+	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

@@ -0,0 +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(private var info: HighlightInfo, private val settings: LensSettingsState) : HintRenderer(null), InputHandler {
+	private lateinit var inlay: Inlay<*>
+	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) {
+		this.info = info
+		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 attributes
+	}
+	
+	override fun useEditorFont(): Boolean {
+		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 {
+		/**
+		 * [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 stripUppercaseTag(text: String): String {
+			if (text.startsWith('[')) {
+				val matcher = UPPERCASE_TAG_REGEX.matcher(text)
+				if (matcher.find()) {
+					return text.substring(matcher.end())
+				}
+			}
+			
+			return text
+		}
+		
+		private fun unescapeHtmlEntities(text: String): String {
+			return if (text.contains('&')) StringUtil.unescapeXmlEntities(text) else text
+		}
+		
+		private fun addEllipsisOrMissingPeriod(text: String, maxLength: Int): String {
+			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/editor/lens/LensSeverity.kt

@@ -1,8 +1,8 @@
-package com.chylex.intellij.inspectionlens.editor
+package com.chylex.intellij.inspectionlens.editor.lens
 
-import com.chylex.intellij.inspectionlens.InspectionLensRefresher
+import com.chylex.intellij.inspectionlens.InspectionLens
+import com.chylex.intellij.inspectionlens.compatibility.SpellCheckerSupport
 import com.intellij.lang.annotation.HighlightSeverity
-import com.intellij.spellchecker.SpellCheckerSeveritiesProvider
 import com.intellij.ui.ColorUtil
 import com.intellij.ui.ColorUtil.toAlpha
 import com.intellij.ui.JBColor
@@ -43,15 +43,18 @@ enum class LensSeverity(baseColor: Color, lightThemeDarkening: Int, darkThemeBri
 			HighlightSeverity.WARNING                         to WARNING,
 			HighlightSeverity.WEAK_WARNING                    to WEAK_WARNING,
 			HighlightSeverity.GENERIC_SERVER_ERROR_OR_WARNING to SERVER_PROBLEM,
-			SpellCheckerSeveritiesProvider.TYPO               to TYPO,
 		))
 		
+		init {
+			SpellCheckerSupport.load()
+		}
+		
 		/**
 		 * Registers a mapping from a [HighlightSeverity] to a [LensSeverity], and refreshes all open editors.
 		 */
 		internal fun registerMapping(severity: HighlightSeverity, lensSeverity: LensSeverity) {
 			if (mapping.put(severity, lensSeverity) != lensSeverity) {
-				InspectionLensRefresher.scheduleRefresh()
+				InspectionLens.scheduleRefresh()
 			}
 		}
 		

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

@@ -0,0 +1,31 @@
+package com.chylex.intellij.inspectionlens.editor.lens
+
+import com.intellij.codeInsight.daemon.impl.SeverityRegistrar
+import com.intellij.lang.annotation.HighlightSeverity
+import java.util.function.Predicate
+
+class LensSeverityFilter(private val hiddenSeverityIds: Set<String>, private val showUnknownSeverities: Boolean) : Predicate<HighlightSeverity> {
+	private val knownSeverityIds = getSupportedSeverities().mapTo(HashSet(), HighlightSeverity::getName)
+	
+	override fun test(severity: HighlightSeverity): Boolean {
+		if (!isSupported(severity)) {
+			return false
+		}
+		
+		return if (severity.name in knownSeverityIds)
+			severity.name !in hiddenSeverityIds
+		else
+			showUnknownSeverities
+	}
+	
+	companion object {
+		@Suppress("DEPRECATION")
+		private fun isSupported(severity: HighlightSeverity): Boolean {
+			return severity > HighlightSeverity.TEXT_ATTRIBUTES && severity !== HighlightSeverity.INFO
+		}
+		
+		fun getSupportedSeverities(registrar: SeverityRegistrar = SeverityRegistrar.getSeverityRegistrar(null)): List<HighlightSeverity> {
+			return registrar.allSeverities.filter(::isSupported)
+		}
+	}
+}

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

@@ -1,4 +1,4 @@
-package com.chylex.intellij.inspectionlens.editor
+package com.chylex.intellij.inspectionlens.editor.lens
 
 import com.intellij.openapi.editor.markup.UnmodifiableTextAttributes
 import com.intellij.ui.JBColor

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

@@ -0,0 +1,159 @@
+package com.chylex.intellij.inspectionlens.settings
+
+import com.chylex.intellij.inspectionlens.editor.lens.LensSeverityFilter
+import com.intellij.codeInsight.daemon.impl.SeverityRegistrar
+import com.intellij.lang.annotation.HighlightSeverity
+import com.intellij.openapi.components.service
+import com.intellij.openapi.editor.event.SelectionEvent
+import com.intellij.openapi.editor.event.SelectionListener
+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
+
+class LensApplicationConfigurable : BoundConfigurable("Inspection Lens"), ConfigurableWithId {
+	companion object {
+		const val ID = "InspectionLens"
+	}
+	
+	private data class DisplayedSeverity(
+		val id: String,
+		val severity: StoredSeverity,
+		val textAttributes: TextAttributes? = null,
+	) {
+		constructor(
+			severity: HighlightSeverity,
+			registrar: SeverityRegistrar,
+		) : this(
+			id = severity.name,
+			severity = StoredSeverity(severity),
+			textAttributes = registrar.getHighlightInfoTypeBySeverity(severity).attributesKey.defaultAttributes
+		)
+	}
+	
+	private val settingsService = service<LensSettingsState>()
+	
+	private val allSeverities by lazy(LazyThreadSafetyMode.NONE) {
+		val settings = settingsService.state
+		val registrar = SeverityRegistrar.getSeverityRegistrar(null)
+		
+		val knownSeverities = LensSeverityFilter.getSupportedSeverities(registrar).map { DisplayedSeverity(it, registrar) }
+		val knownSeverityIds = knownSeverities.mapTo(HashSet(), DisplayedSeverity::id)
+		
+		// Update names and priorities of stored severities.
+		for ((id, knownSeverity, _) in knownSeverities) {
+			val storedSeverity = settings.hiddenSeverities[id]
+			if (storedSeverity != null && storedSeverity != knownSeverity) {
+				settings.hiddenSeverities[id] = knownSeverity
+			}
+		}
+		
+		val unknownSeverities = settings.hiddenSeverities.entries
+			.filterNot { it.key in knownSeverityIds }
+			.map { DisplayedSeverity(it.key, it.value) }
+		
+		(knownSeverities + unknownSeverities).sortedByDescending { it.severity.priority }
+	}
+	
+	override fun getId(): String {
+		return ID
+	}
+	
+	override fun createPanel(): DialogPanel {
+		val settings = settingsService.state
+		
+		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 {
+						checkBox(severity.name)
+							.bindSelectedToNotIn(settings.hiddenSeverities, id, severity)
+							.gap(RightGap.COLUMNS)
+						
+						labelWithAttributes("Example", textAttributes)
+					}.layout(RowLayout.PARENT_GRID)
+				}
+				
+				row {
+					checkBox("Other").bindSelected(settings::showUnknownSeverities)
+				}
+			}
+			
+			group("Actions") {
+				row {
+					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> {
+		return bindSelected({ key !in collection }, { if (it) collection.remove(key) else collection[key] = value })
+	}
+	
+	private fun Row.labelWithAttributes(text: String, textAttributes: TextAttributes?): Cell<SimpleRendererComponent> {
+		val label = SimpleRendererComponent(null, null, true)
+		label.setText(text, textAttributes, false)
+		label.focusTraversalPolicy = DisabledTraversalPolicy()
+		
+		val editor = label.editor
+		editor.setCustomCursor(this, Cursor.getDefaultCursor())
+		editor.contentComponent.setOpaque(false)
+		editor.selectionModel.addSelectionListener(object : SelectionListener {
+			override fun selectionChanged(e: SelectionEvent) {
+				if (!e.newRange.isEmpty) {
+					editor.selectionModel.removeSelection(true)
+				}
+			}
+		})
+		
+		Disposer.register(disposable!!, label)
+		return cell(label)
+	}
+	
+	override fun apply() {
+		super.apply()
+		settingsService.update()
+	}
+}

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

@@ -0,0 +1,73 @@
+package com.chylex.intellij.inspectionlens.settings
+
+import com.chylex.intellij.inspectionlens.InspectionLens
+import com.chylex.intellij.inspectionlens.editor.lens.LensSeverityFilter
+import com.intellij.openapi.components.BaseState
+import com.intellij.openapi.components.SettingsCategory
+import com.intellij.openapi.components.SimplePersistentStateComponent
+import com.intellij.openapi.components.State
+import com.intellij.openapi.components.Storage
+import com.intellij.util.xmlb.annotations.XMap
+
+@State(
+	name = LensApplicationConfigurable.ID,
+	storages = [ Storage("chylex.inspectionLens.xml") ],
+	category = SettingsCategory.UI
+)
+class LensSettingsState : SimplePersistentStateComponent<LensSettingsState.State>(State()) {
+	class State : BaseState() {
+		@get:XMap
+		val hiddenSeverities by map<String, StoredSeverity>()
+		
+		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
+	@set:Synchronized
+	var severityFilter = createSeverityFilter()
+		private set
+	
+	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()
+	}
+	
+	fun update() {
+		severityFilter = createSeverityFilter()
+		InspectionLens.scheduleRefresh()
+	}
+	
+	private fun createSeverityFilter(): LensSeverityFilter {
+		val state = state
+		return LensSeverityFilter(state.hiddenSeverities.keys, state.showUnknownSeverities)
+	}
+}

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

@@ -0,0 +1,9 @@
+package com.chylex.intellij.inspectionlens.settings
+
+import com.intellij.lang.annotation.HighlightSeverity
+import com.intellij.util.xmlb.annotations.Tag
+
+@Tag("severity")
+data class StoredSeverity(var name: String = "", var priority: Int = 0) {
+	constructor(severity: HighlightSeverity) : this(severity.displayCapitalizedName, severity.myVal)
+}

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

@@ -4,19 +4,49 @@
   <vendor url="https://chylex.com">chylex</vendor>
   
   <description><![CDATA[
-    Shows errors, warnings, and other inspection highlights inline.
+    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>
-    After installing the plugin, inspection descriptions will appear after the ends of lines, and the lines will be highlighted with a background color.
-    Shown inspection severities are <b>Errors</b>, <b>Warnings</b>, <b>Weak Warnings</b>, <b>Server Problems</b>, <b>Grammar Errors</b>, <b>Typos</b>, and other inspections from plugins or future IntelliJ versions that have a high enough severity level.
-    Each severity has a different color, with support for both light and dark themes.
+    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>
-    Note: The plugin is not customizable outside the ability to disable/enable the plugin without restarting the IDE.
-    If the defaults don't work for you, I recommend trying the <a href="https://plugins.jetbrains.com/plugin/17302-inlineerror">Inline Error</a> plugin which can be customized, building your own version of Inspection Lens, or proposing your change in the <a href="https://github.com/chylex/IntelliJ-Inspection-Lens/issues">issue tracker</a>.
+    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>
+    </ul>
+    <b>Version 1.4</b>
+    <ul>
+      <li>Added configuration of visible severities to <b>Settings | Tools | Inspection Lens</b>.</li>
+    </ul>
+    <b>Version 1.3.3</b>
+    <ul>
+      <li>Partially reverted fix for inspections that include HTML in their description due to breaking inspections with angled brackets.</li>
+      <li>Fixed plugin not working when installed on JetBrains Gateway Client.</li>
+    </ul>
     <b>Version 1.3.2</b>
     <ul>
       <li>Fixed inspections randomly not disappearing.</li>
@@ -58,6 +88,14 @@
   <depends>com.intellij.modules.platform</depends>
   <depends optional="true" config-file="compatibility/InspectionLens-Grazie.xml">tanvd.grazi</depends>
   
+  <extensions defaultExtensionNs="com.intellij">
+    <applicationService serviceImplementation="com.chylex.intellij.inspectionlens.settings.LensSettingsState" />
+    <applicationConfigurable id="com.chylex.intellij.inspectionlens.settings.LensApplicationConfigurable"
+                             instance="com.chylex.intellij.inspectionlens.settings.LensApplicationConfigurable"
+                             displayName="Inspection Lens"
+                             parentId="tools" />
+  </extensions>
+  
   <applicationListeners>
     <listener class="com.chylex.intellij.inspectionlens.InspectionLensPluginListener" topic="com.intellij.ide.plugins.DynamicPluginListener" />
   </applicationListeners>

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

@@ -1,6 +1,5 @@
-package com.chylex.intellij.inspectionlens
+package com.chylex.intellij.inspectionlens.editor.lens
 
-import com.chylex.intellij.inspectionlens.editor.EditorLensInlay
 import com.intellij.lang.annotation.HighlightSeverity
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Nested
@@ -48,7 +47,7 @@ class EditorLensTest {
 		}
 		
 		/**
-		 * If any of these change, re-evaluate [EditorLensInlay.MAXIMUM_SEVERITY] and the priority calculations.
+		 * If any of these changes, re-evaluate [EditorLensInlay.MAXIMUM_SEVERITY] and the priority calculations.
 		 */
 		@Nested
 		inner class IdeaHighlightSeverityAssumptions {

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)
+	}
+}