Set version to chylex-26

Search results are tested for visibility on the screen. There is already an optimization that only checks results on visible lines, but the number of offset-to-XY conversions still scales linearly with the number of results, which can be very large in files with long lines.

A simple observation is that every line has a first and last offset that is visible on the screen (which may be different for each line due to proportional fonts).

This commit caches the visible offset range for every line involved in one search query, so testing visibility of a search result becomes a check if its offset is inside its line's visible offset range. Finding the visible offset range requires two XY-to-offset conversions per line, so the total number of conversions is bounded by the number of lines that can fit on the screen.

The worst case for this optimization is when every line has exactly one search result; before, this would lead to one offset-to-XY conversion per line, whereas now it leads to two XY-to-offset conversions per line. However, the maximum number of conversions is twice the number of visible lines, which will generally be very small.

build.gradle.kts

@@ -4,23 +4,26 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 plugins {
   kotlin("jvm") version "1.9.10"
-  id("org.jetbrains.intellij") version "1.16.1"
+  id("org.jetbrains.intellij") version "1.17.3"
 }
 
 group = "org.acejump"
-version = "chylex-16"
+version = "chylex-26"
 
 repositories {
   mavenCentral()
 }
 
 intellij {
-  version.set("2023.3")
+  version.set("2024.2")
   updateSinceUntilBuild.set(false)
-  plugins.add("IdeaVIM:chylex-22")
+  
+  plugins.add("IdeaVIM:chylex-41")
+  plugins.add("com.intellij.classic.ui:242.20224.159")
   
   pluginsRepositories {
     custom("https://intellij.chylex.com")
+    marketplace()
   }
 }
 
@@ -33,7 +36,7 @@ dependencies {
 }
 
 tasks.patchPluginXml {
-  sinceBuild.set("233")
+  sinceBuild.set("242")
 }
 
 tasks.buildSearchableOptions {

src/main/kotlin/org/acejump/AceUtil.kt

@@ -7,8 +7,6 @@ import com.intellij.openapi.project.Project
 import com.intellij.util.IncorrectOperationException
 import it.unimi.dsi.fastutil.ints.IntArrayList
 
-annotation class ExternalUsage
-
 /**
  * Returns an immutable version of the currently edited document.
  */
@@ -52,57 +50,6 @@ fun CharSequence.countMatchingCharacters(selfOffset: Int, otherText: String): In
   return i
 }
 
-/**
- * Determines which characters form a "word" for the purposes of functions below.
- */
-val Char.isWordPart
-  get() = this in 'a'..'z' || this.isJavaIdentifierPart()
-
-/**
- * Finds index of the first character in a word.
- */
-inline fun CharSequence.wordStart(pos: Int, isPartOfWord: (Char) -> Boolean = Char::isWordPart): Int {
-  var start = pos
-  
-  while (start > 0 && isPartOfWord(this[start - 1])) {
-    --start
-  }
-  
-  return start
-}
-
-/**
- * Finds index of the last character in a word.
- */
-inline fun CharSequence.wordEnd(pos: Int, isPartOfWord: (Char) -> Boolean = Char::isWordPart): Int {
-  var end = pos
-  val limit = length - 1
-  
-  while (end < limit && isPartOfWord(this[end + 1])) {
-    ++end
-  }
-  
-  return end
-}
-
-/**
- * Finds index of the first word character following a sequence of non-word characters following the end of a word.
- */
-inline fun CharSequence.wordEndPlus(pos: Int, isPartOfWord: (Char) -> Boolean = Char::isWordPart): Int {
-  var end = this.wordEnd(pos, isPartOfWord)
-  val limit = length - 1
-  
-  while (end < limit && !isPartOfWord(this[end + 1])) {
-    ++end
-  }
-  
-  if (end < limit && isPartOfWord(this[end + 1])) {
-    ++end
-  }
-  
-  return end
-}
-
 fun MutableMap<Editor, IntArrayList>.clone(): MutableMap<Editor, IntArrayList> {
   val clone = HashMap<Editor, IntArrayList>(size)
   

src/main/kotlin/org/acejump/action/AceVimAction.kt

@@ -1,5 +1,6 @@
 package org.acejump.action
 
+import com.intellij.openapi.actionSystem.ActionUpdateThread
 import com.intellij.openapi.actionSystem.AnActionEvent
 import com.intellij.openapi.actionSystem.CommonDataKeys
 import com.intellij.openapi.application.ApplicationManager
@@ -10,13 +11,12 @@ import com.maddyhome.idea.vim.action.change.change.ChangeVisualAction
 import com.maddyhome.idea.vim.action.change.delete.DeleteVisualAction
 import com.maddyhome.idea.vim.action.copy.YankVisualAction
 import com.maddyhome.idea.vim.api.injector
-import com.maddyhome.idea.vim.command.MappingMode.OP_PENDING
 import com.maddyhome.idea.vim.command.OperatorArguments
 import com.maddyhome.idea.vim.group.visual.vimSetSelection
 import com.maddyhome.idea.vim.helper.inVisualMode
 import com.maddyhome.idea.vim.helper.vimSelectionStart
-import com.maddyhome.idea.vim.helper.vimStateMachine
 import com.maddyhome.idea.vim.newapi.vim
+import com.maddyhome.idea.vim.state.mode.Mode.OP_PENDING
 import com.maddyhome.idea.vim.state.mode.SelectionType
 import org.acejump.boundaries.StandardBoundaries.AFTER_CARET
 import org.acejump.boundaries.StandardBoundaries.BEFORE_CARET
@@ -52,12 +52,11 @@ sealed class AceVimAction : DumbAwareAction() {
           }
           else {
             val vim = editor.vim
-            val commandState = vim.vimStateMachine
-            if (commandState.isOperatorPending) {
-              val key = commandState.commandBuilder.keys.singleOrNull()?.keyChar
+            if (vim.mode is OP_PENDING) {
+              val keyHandler = KeyHandler.getInstance()
+              val key = keyHandler.keyHandlerState.commandBuilder.keys.singleOrNull()?.keyChar
               
-              commandState.reset()
-              KeyHandler.getInstance().fullReset(vim)
+              keyHandler.fullReset(vim)
               
               AceVimUtil.enterVisualMode(vim, SelectionType.CHARACTER_WISE)
               caret.vim.vimSetSelection(caret.offset, initialOffset, moveCaretToSelectionEnd = true)
@@ -72,15 +71,16 @@ sealed class AceVimAction : DumbAwareAction() {
               if (action != null) {
                 ApplicationManager.getApplication().invokeLater {
                   WriteAction.run<Nothing> {
-                    commandState.commandBuilder.pushCommandPart(action)
+                    keyHandler.keyHandlerState.commandBuilder.addAction(action)
                     
-                    val cmd = commandState.commandBuilder.buildCommand()
-                    val operatorArguments = OperatorArguments(commandState.mappingState.mappingMode == OP_PENDING, cmd.rawCount, commandState.mode)
+                    val cmd = keyHandler.keyHandlerState.commandBuilder.buildCommand()
+                    val operatorArguments = OperatorArguments(vim.mode is OP_PENDING, cmd.rawCount, injector.vimState.mode)
                     
-                    commandState.executingCommand = cmd
+                    injector.vimState.executingCommand = cmd
                     injector.actionExecutor.executeVimAction(vim, action, context, operatorArguments)
-                    // TODO does not update status
                   }
+                  
+                  keyHandler.reset(vim)
                 }
               }
             }
@@ -168,6 +168,10 @@ sealed class AceVimAction : DumbAwareAction() {
       action.presentation.isEnabled = action.getData(CommonDataKeys.EDITOR) != null
     }
     
+    override fun getActionUpdateThread(): ActionUpdateThread {
+      return ActionUpdateThread.BGT
+    }
+    
     override fun actionPerformed(e: AnActionEvent) {
       val editor = e.getData(CommonDataKeys.EDITOR) ?: return
       val session = SessionManager.start(editor, AceVimMode.JumpAllEditors.getJumpEditors(editor))

src/main/kotlin/org/acejump/boundaries/EditorOffsetCache.kt

@@ -18,6 +18,11 @@ sealed class EditorOffsetCache {
    */
   abstract fun visibleArea(editor: Editor): Pair<Point, Point>
   
+  /**
+   * Returns whether the offset is in the visible area rectangle.
+   */
+  abstract fun isVisible(editor: Editor, offset: Int): Boolean
+  
   /**
    * Returns the editor offset at the provided pixel coordinate.
    */
@@ -36,6 +41,7 @@ sealed class EditorOffsetCache {
   
   private class Cache : EditorOffsetCache() {
     private var visibleArea: Pair<Point, Point>? = null
+    private val lineToVisibleOffsetRange = Int2ObjectOpenHashMap<IntRange>()
     private val pointToOffset = Object2IntOpenHashMap<Point>().apply { defaultReturnValue(-1) }
     private val offsetToPoint = Int2ObjectOpenHashMap<Point>()
     
@@ -43,6 +49,24 @@ sealed class EditorOffsetCache {
       return visibleArea ?: Uncached.visibleArea(editor).also { visibleArea = it }
     }
     
+    override fun isVisible(editor: Editor, offset: Int): Boolean {
+      val visualLine = editor.offsetToVisualLine(offset, false)
+      
+      var visibleRange = lineToVisibleOffsetRange.get(visualLine)
+      if (visibleRange == null) {
+        val (topLeft, bottomRight) = visibleArea(editor)
+        val lineY = editor.visualLineToY(visualLine)
+        
+        val firstVisibleOffset = xyToOffset(editor, Point(topLeft.x, lineY))
+        val lastVisibleOffset = xyToOffset(editor, Point(bottomRight.x, lineY))
+        
+        visibleRange = firstVisibleOffset..lastVisibleOffset
+        lineToVisibleOffsetRange.put(visualLine, visibleRange)
+      }
+      
+      return offset in visibleRange
+    }
+    
     override fun xyToOffset(editor: Editor, pos: Point): Int {
       val offset = pointToOffset.getInt(pos)
       
@@ -51,7 +75,6 @@ sealed class EditorOffsetCache {
       }
       
       return Uncached.xyToOffset(editor, pos).also {
-        @Suppress("ReplacePutWithAssignment")
         pointToOffset.put(pos, it)
       }
     }
@@ -64,7 +87,6 @@ sealed class EditorOffsetCache {
       }
       
       return Uncached.offsetToXY(editor, offset).also {
-        @Suppress("ReplacePutWithAssignment")
         offsetToPoint.put(offset, it)
       }
     }
@@ -80,6 +102,15 @@ sealed class EditorOffsetCache {
       )
     }
     
+    override fun isVisible(editor: Editor, offset: Int): Boolean {
+      val (topLeft, bottomRight) = visibleArea(editor)
+      val pos = offsetToXY(editor, offset)
+      val x = pos.x
+      val y = pos.y
+      
+      return x >= topLeft.x && y >= topLeft.y && x <= bottomRight.x && y <= bottomRight.y
+    }
+    
     override fun xyToOffset(editor: Editor, pos: Point): Int {
       return editor.logicalPositionToOffset(editor.xyToLogicalPosition(pos))
     }

src/main/kotlin/org/acejump/boundaries/StandardBoundaries.kt

@@ -13,23 +13,7 @@ enum class StandardBoundaries : Boundaries {
     }
     
     override fun isOffsetInside(editor: Editor, offset: Int, cache: EditorOffsetCache): Boolean {
-      
-      // If we are not using a cache, calling getOffsetRange will cause additional 1-2 pixel coordinate -> offset lookups, which is a lot
-      // more expensive than one lookup compared against the visible area.
-      
-      // However, if we are using a cache, it's likely that the topmost and bottommost positions are already cached whereas the provided
-      // offset isn't, so we save a lookup for every offset outside the range.
-      
-      if (cache !== EditorOffsetCache.Uncached && offset !in getOffsetRange(editor, cache)) {
-        return false
-      }
-      
-      val (topLeft, bottomRight) = cache.visibleArea(editor)
-      val pos = cache.offsetToXY(editor, offset)
-      val x = pos.x
-      val y = pos.y
-      
-      return x >= topLeft.x && y >= topLeft.y && x <= bottomRight.x && y <= bottomRight.y
+      return cache.isVisible(editor, offset)
     }
   },
   

src/main/kotlin/org/acejump/config/AceConfig.kt

@@ -20,6 +20,8 @@ class AceConfig : PersistentStateComponent<AceSettings> {
     
     val layout get() = settings.layout
     val minQueryLength get() = settings.minQueryLength
+    val invertUppercaseMode get() = settings.invertUppercaseMode
+    val editorFadeOpacity get() = settings.editorFadeOpacity
     val jumpModeColor get() = settings.jumpModeColor
     val tagForegroundColor1 get() = settings.tagForegroundColor1
     val tagForegroundColor2 get() = settings.tagForegroundColor2

src/main/kotlin/org/acejump/config/AceConfigurable.kt

@@ -13,9 +13,10 @@ class AceConfigurable : Configurable {
   
   override fun isModified() =
     panel.allowedChars != settings.allowedChars ||
-      panel.prefixChars != settings.prefixChars ||
       panel.keyboardLayout != settings.layout ||
       panel.minQueryLengthInt != settings.minQueryLength ||
+      panel.invertUppercaseMode != settings.invertUppercaseMode ||
+      panel.editorFadeOpacityPercent != settings.editorFadeOpacity ||
       panel.jumpModeColor != settings.jumpModeColor ||
       panel.tagForegroundColor1 != settings.tagForegroundColor1 ||
       panel.tagForegroundColor2 != settings.tagForegroundColor2 ||
@@ -23,9 +24,10 @@ class AceConfigurable : Configurable {
   
   override fun apply() {
     settings.allowedChars = panel.allowedChars
-    settings.prefixChars = panel.prefixChars
     settings.layout = panel.keyboardLayout
     settings.minQueryLength = panel.minQueryLengthInt ?: settings.minQueryLength
+    settings.invertUppercaseMode = panel.invertUppercaseMode
+    settings.editorFadeOpacity = panel.editorFadeOpacityPercent
     panel.jumpModeColor?.let { settings.jumpModeColor = it }
     panel.tagForegroundColor1?.let { settings.tagForegroundColor1 = it }
     panel.tagForegroundColor2?.let { settings.tagForegroundColor2 = it }

src/main/kotlin/org/acejump/config/AceSettings.kt

@@ -8,8 +8,9 @@ import java.awt.Color
 data class AceSettings(
   var layout: KeyLayout = QWERTY,
   var allowedChars: String = layout.allChars,
-  var prefixChars: String = ";",
+  var invertUppercaseMode: Boolean = false,
   var minQueryLength: Int = 1,
+  var editorFadeOpacity: Int = 70,
   
   @OptionTag("jumpModeRGB", converter = ColorConverter::class)
   var jumpModeColor: Color = Color(0xFFFFFF),

src/main/kotlin/org/acejump/config/AceSettingsPanel.kt

@@ -2,18 +2,23 @@ package org.acejump.config
 
 import com.intellij.openapi.ui.ComboBox
 import com.intellij.ui.ColorPanel
+import com.intellij.ui.components.JBCheckBox
+import com.intellij.ui.components.JBSlider
 import com.intellij.ui.components.JBTextArea
 import com.intellij.ui.components.JBTextField
-import com.intellij.ui.layout.Cell
-import com.intellij.ui.layout.GrowPolicy.MEDIUM_TEXT
-import com.intellij.ui.layout.GrowPolicy.SHORT_TEXT
-import com.intellij.ui.layout.panel
+import com.intellij.ui.dsl.builder.COLUMNS_LARGE
+import com.intellij.ui.dsl.builder.COLUMNS_SHORT
+import com.intellij.ui.dsl.builder.columns
+import com.intellij.ui.dsl.builder.panel
 import org.acejump.input.KeyLayout
 import java.awt.Color
+import java.awt.Dimension
 import java.awt.Font
+import java.util.Hashtable
 import javax.swing.JCheckBox
-import javax.swing.JComponent
+import javax.swing.JLabel
 import javax.swing.JPanel
+import javax.swing.JSlider
 import javax.swing.text.JTextComponent
 import kotlin.reflect.KProperty
 
@@ -23,10 +28,19 @@ import kotlin.reflect.KProperty
 @Suppress("UsePropertyAccessSyntax")
 internal class AceSettingsPanel {
   private val tagAllowedCharsField = JBTextField()
-  private val tagPrefixCharsField = JBTextField()
   private val keyboardLayoutCombo = ComboBox<KeyLayout>()
   private val keyboardLayoutArea = JBTextArea().apply { isEditable = false }
   private val minQueryLengthField = JBTextField()
+  private val invertUppercaseModeCheckBox = JBCheckBox("Invert uppercase mode")
+  private val editorFadeOpacitySlider = JBSlider(0, 10).apply {
+    labelTable = Hashtable((0..10).associateWith { JLabel("${it * 10}") })
+    paintTrack = true
+    paintLabels = true
+    paintTicks = true
+    minorTickSpacing = 1
+    majorTickSpacing = 1
+    minimumSize = Dimension(275, minimumSize.height)
+  }
   private val jumpModeColorWheel = ColorPanel()
   private val tagForeground1ColorWheel = ColorPanel()
   private val tagForeground2ColorWheel = ColorPanel()
@@ -34,52 +48,46 @@ internal class AceSettingsPanel {
   
   init {
     tagAllowedCharsField.apply { font = Font("monospaced", font.style, font.size) }
-    tagPrefixCharsField.apply { font = Font("monospaced", font.style, font.size) }
     keyboardLayoutArea.apply { font = Font("monospaced", font.style, font.size) }
     keyboardLayoutCombo.setupEnumItems { keyChars = it.rows.joinToString("\n") }
   }
   
   internal val rootPanel: JPanel = panel {
-    fun Cell.short(component: JComponent) = component(growPolicy = SHORT_TEXT)
-    fun Cell.medium(component: JComponent) = component(growPolicy = MEDIUM_TEXT)
-    
-    titledRow("Characters and Layout") {
-      row("Allowed characters in tags:") { medium(tagAllowedCharsField) }
-      row("Allowed prefix characters in tags:") { medium(tagPrefixCharsField) }
-      row("Keyboard layout:") { short(keyboardLayoutCombo) }
-      row("Keyboard design:") { short(keyboardLayoutArea) }
+    group("Characters and Layout") {
+      row("Allowed characters in tags:") { cell(tagAllowedCharsField).columns(COLUMNS_LARGE) }
+      row("Keyboard layout:") { cell(keyboardLayoutCombo).columns(COLUMNS_SHORT) }
+      row("Keyboard design:") { cell(keyboardLayoutArea).columns(COLUMNS_SHORT) }
     }
     
-    titledRow("Behavior") {
-      row("Minimum typed characters (1-10):") { short(minQueryLengthField) }
+    group("Behavior") {
+      row("Minimum typed characters (1-10):") { cell(minQueryLengthField).columns(COLUMNS_SHORT) }
+      row { cell(invertUppercaseModeCheckBox) }
     }
     
-    titledRow("Colors") {
+    group("Colors") {
       row("Caret background:") {
-        cell {
-          component(jumpModeColorWheel)
-        }
+        cell(jumpModeColorWheel)
       }
       row("Tag foreground:") {
-        cell {
-          component(tagForeground1ColorWheel)
-          component(tagForeground2ColorWheel)
-        }
+        cell(tagForeground1ColorWheel)
+        cell(tagForeground2ColorWheel)
       }
       row("Search highlight:") {
-        cell {
-          component(searchHighlightColorWheel)
+        cell(searchHighlightColorWheel)
       }
+      row("Editor fade opacity (%):") {
+        cell(editorFadeOpacitySlider)
       }
     }
   }
   
   // Property-to-property delegation: https://stackoverflow.com/q/45074596/1772342
   internal var allowedChars by tagAllowedCharsField
-  internal var prefixChars by tagPrefixCharsField
   internal var keyboardLayout by keyboardLayoutCombo
   internal var keyChars by keyboardLayoutArea
   internal var minQueryLength by minQueryLengthField
+  internal var invertUppercaseMode by invertUppercaseModeCheckBox
+  internal var editorFadeOpacity by editorFadeOpacitySlider
   internal var jumpModeColor by jumpModeColorWheel
   internal var tagForegroundColor1 by tagForeground1ColorWheel
   internal var tagForegroundColor2 by tagForeground2ColorWheel
@@ -89,11 +97,16 @@ internal class AceSettingsPanel {
     get() = minQueryLength.toIntOrNull()?.coerceIn(1, 10)
     set(value) { minQueryLength = value.toString() }
   
+  internal var editorFadeOpacityPercent
+    get() = editorFadeOpacity * 10
+    set(value) { editorFadeOpacity = value / 10 }
+  
   fun reset(settings: AceSettings) {
     allowedChars = settings.allowedChars
-    prefixChars = settings.prefixChars
     keyboardLayout = settings.layout
     minQueryLength = settings.minQueryLength.toString()
+    invertUppercaseMode = settings.invertUppercaseMode
+    editorFadeOpacityPercent = settings.editorFadeOpacity
     jumpModeColor = settings.jumpModeColor
     tagForegroundColor1 = settings.tagForegroundColor1
     tagForegroundColor2 = settings.tagForegroundColor2
@@ -102,7 +115,7 @@ internal class AceSettingsPanel {
   
   // Removal pending support for https://youtrack.jetbrains.com/issue/KT-8575
   
-  private operator fun JTextComponent.getValue(a: AceSettingsPanel, p: KProperty<*>) = text.toLowerCase()
+  private operator fun JTextComponent.getValue(a: AceSettingsPanel, p: KProperty<*>) = text.lowercase()
   private operator fun JTextComponent.setValue(a: AceSettingsPanel, p: KProperty<*>, s: String) = setText(s)
   
   private operator fun ColorPanel.getValue(a: AceSettingsPanel, p: KProperty<*>) = selectedColor
@@ -111,6 +124,9 @@ internal class AceSettingsPanel {
   private operator fun JCheckBox.getValue(a: AceSettingsPanel, p: KProperty<*>) = isSelected
   private operator fun JCheckBox.setValue(a: AceSettingsPanel, p: KProperty<*>, selected: Boolean) = setSelected(selected)
   
+  private operator fun JSlider.getValue(a: AceSettingsPanel, p: KProperty<*>) = value
+  private operator fun JSlider.setValue(a: AceSettingsPanel, p: KProperty<*>, value: Int) = setValue(value)
+  
   private operator fun <T> ComboBox<T>.getValue(a: AceSettingsPanel, p: KProperty<*>) = selectedItem as T
   private operator fun <T> ComboBox<T>.setValue(a: AceSettingsPanel, p: KProperty<*>, item: T) = setSelectedItem(item)
   

src/main/kotlin/org/acejump/input/EditorKeyListener.kt

@@ -10,7 +10,6 @@ import com.intellij.openapi.editor.actionSystem.TypedActionHandler
  * sessions' own handlers.
  */
 internal object EditorKeyListener : TypedActionHandler {
-  private val action = TypedAction.getInstance()
   private val attached = mutableMapOf<Editor, TypedActionHandler>()
   private var originalHandler: TypedActionHandler? = null
   
@@ -20,8 +19,9 @@ internal object EditorKeyListener : TypedActionHandler {
   
   fun attach(editor: Editor, callback: TypedActionHandler) {
     if (attached.isEmpty()) {
-      originalHandler = action.rawHandler
-      action.setupRawHandler(this)
+      val typedAction = TypedAction.getInstance()
+      originalHandler = typedAction.rawHandler
+      typedAction.setupRawHandler(this)
     }
     
     attached[editor] = callback
@@ -31,7 +31,7 @@ internal object EditorKeyListener : TypedActionHandler {
     attached.remove(editor)
     
     if (attached.isEmpty()) {
-      originalHandler?.let(action::setupRawHandler)
+      originalHandler?.let(TypedAction.getInstance()::setupRawHandler)
       originalHandler = null
     }
   }

src/main/kotlin/org/acejump/input/KeyLayout.kt

@@ -4,21 +4,49 @@ package org.acejump.input
  * Defines common keyboard layouts. Each layout has a key priority order, based on each key's distance from the home row and how
  * ergonomically difficult they are to press.
  */
-@Suppress("unused")
-enum class KeyLayout(internal val rows: Array<String>, priority: String) {
+@Suppress("unused", "SpellCheckingInspection")
+enum class KeyLayout(
+  internal val rows: Array<String>,
+  priority: String,
+  private val characterSides: Pair<Set<Char>, Set<Char>> = Pair(emptySet(), emptySet()),
+  internal val characterRemapping: Map<Char, Char> = emptyMap(),
+) {
   COLEMK(arrayOf("1234567890", "qwfpgjluy", "arstdhneio", "zxcvbkm"), priority = "tndhseriaovkcmbxzgjplfuwyq5849673210"),
   WORKMN(arrayOf("1234567890", "qdrwbjfup", "ashtgyneoi", "zxmcvkl"), priority = "tnhegysoaiclvkmxzwfrubjdpq5849673210"),
   DVORAK(arrayOf("1234567890", "pyfgcrl", "aoeuidhtns", "qjkxbmwvz"), priority = "uhetidonasxkbjmqwvzgfycprl5849673210"),
-  QWERTY(arrayOf("1234567890", "qwertyuiop", "asdfghjkl", "zxcvbnm"), priority = "fjghdkslavncmbxzrutyeiwoqp5849673210"),
-  QWERTZ(arrayOf("1234567890", "qwertzuiop", "asdfghjkl", "yxcvbnm"), priority = "fjghdkslavncmbxyrutzeiwoqp5849673210"),
+  QWERTY(arrayOf("1234567890", "qwertyuiop", "asdfghjkl", "zxcvbnm"), priority = "fjghdkslavncmbxzrutyeiwoqp5849673210", characterSides = sides(listOf("123456", "qwert", "asdfg", "zxcvb"), listOf("7890", "yuiop", "hjkl", "nm"))),
+  QWERTZ(arrayOf("1234567890", "qwertzuiop", "asdfghjkl", "yxcvbnm"), priority = "fjghdkslavncmbxyrutzeiwoqp5849673210", characterSides = sides(listOf("123456", "qwert", "asdfg", "yxcvb"), listOf("7890", "zuiop", "hjkl", "nm"))),
+  QWERTZ_CZ(arrayOf("1234567890", "qwertzuiop", "asdfghjkl", "yxcvbnm"), priority = "fjghdkslavncmbxyrutzeiwoqp5849673210", characterSides = sides(listOf("123456", "qwert", "asdfg", "yxcvb"), listOf("7890", "zuiop", "hjkl", "nm")), characterRemapping = mapOf(
+    '+' to '1',
+    'ě' to '2',
+    'š' to '3',
+    'č' to '4',
+    'ř' to '5',
+    'ž' to '6',
+    'ý' to '7',
+    'á' to '8',
+    'í' to '9',
+    'é' to '0'
+  )),
   QGMLWY(arrayOf("1234567890", "qgmlwyfub", "dstnriaeoh", "zxcvjkp"), priority = "naterisodhvkcpjxzlfmuwygbq5849673210"),
   QGMLWB(arrayOf("1234567890", "qgmlwbyuv", "dstnriaeoh", "zxcfjkp"), priority = "naterisodhfkcpjxzlymuwbgvq5849673210"),
   NORMAN(arrayOf("1234567890", "qwdfkjurl", "asetgynioh", "zxcvbpm"), priority = "tneigysoahbvpcmxzjkufrdlwq5849673210");
   
   internal val allChars = rows.joinToString("").toCharArray().apply(CharArray::sort).joinToString("")
-  internal val allPriorities = priority.mapIndexed { index, char -> char to index }.toMap()
+  private val allPriorities = priority.mapIndexed { index, char -> char to index }.toMap()
   
-  internal inline fun priority(crossinline tagToChar: (String) -> Char): (String) -> Int {
-    return { allPriorities.getOrDefault(tagToChar(it), Int.MAX_VALUE) }
+  fun priority(char: Char): Int {
+    return allPriorities[char] ?: allChars.length
+  }
+  
+  fun areOnSameSide(c1: Char, c2: Char): Boolean {
+    return (c1 in characterSides.first && c2 in characterSides.first) || (c1 in characterSides.second && c2 in characterSides.second)
   }
 }
+
+private fun sides(left: List<String>, right: List<String>): Pair<Set<Char>, Set<Char>> {
+  return Pair(
+    left.flatMapTo(mutableSetOf()) { it.toCharArray().toSet() },
+    right.flatMapTo(mutableSetOf()) { it.toCharArray().toSet() }
+  )
+}

src/main/kotlin/org/acejump/input/KeyLayoutCache.kt

@@ -1,30 +1,22 @@
 package org.acejump.input
 
 import org.acejump.config.AceSettings
+import kotlin.math.pow
+import kotlin.math.roundToInt
 
 /**
  * Stores data specific to the selected keyboard layout. We want to assign tags with easily reachable keys first, and ideally have tags
  * with repeated keys (ex. FF, JJ) or adjacent keys (ex. GH, UJ).
  */
 internal object KeyLayoutCache {
-  /**
-   * Sorts tags according to current keyboard layout settings, and some predefined rules that force tags with digits, and tags with two
-   * keys far apart, to be sorted after other (easier to type) tags.
-   */
-  lateinit var tagOrder: Comparator<String>
-    private set
-  
-  /**
-   * Returns all possible two key tags, pre-sorted according to [tagOrder].
-   */
-  lateinit var allPossibleTagsLowercase: List<String>
+  lateinit var allowedTagsSorted: List<String>
     private set
   
   /**
    * Called before any lazily initialized properties are used, to ensure that they are initialized even if the settings are missing.
    */
   fun ensureInitialized(settings: AceSettings) {
-    if (!::tagOrder.isInitialized) {
+    if (!::allowedTagsSorted.isInitialized) {
       reset(settings)
     }
   }
@@ -33,21 +25,38 @@ internal object KeyLayoutCache {
    * Re-initializes cached data according to updated settings.
    */
   fun reset(settings: AceSettings) {
-    tagOrder = compareBy(
-      String::length,
-      settings.layout.priority(String::last)
-    )
+    val allowedChars = processCharList(settings.allowedChars).ifEmpty { processCharList(settings.layout.allChars) }
+    val allowedTags = mutableSetOf<String>()
     
-    @Suppress("ConvertLambdaToReference")
-    val allSuffixChars = processCharList(settings.allowedChars).ifEmpty { processCharList(settings.layout.allChars).toList() }
-    val allPrefixChars = processCharList(settings.prefixChars).filterNot(allSuffixChars::contains).plus("")
+    for (c1 in allowedChars) {
+      allowedTags.add("$c1")
       
-    allPossibleTagsLowercase = allSuffixChars
-      .flatMap { suffix -> allPrefixChars.map { prefix -> "$prefix$suffix" } }
-      .sortedWith(tagOrder)
-  }
-  
-  private fun processCharList(charList: String): Set<String> {
-    return charList.toCharArray().map(Char::lowercase).toSet()
+      for (c2 in allowedChars) {
+        if (c1 != c2) {
+          allowedTags.add("$c1$c2")
+        }
+      }
+    }
+    
+    allowedTagsSorted = allowedTags.sortedBy { rankPriority(settings.layout, it) }
+  }
+  
+  private fun processCharList(charList: String): List<Char> {
+    return charList.toCharArray().map(Char::lowercaseChar).distinct()
+  }
+  
+  private fun rankPriority(layout: KeyLayout, tag: String): Int {
+    val c1 = tag.first()
+    val p1 = (1.0 + layout.priority(c1)).pow(3)
+    
+    if (tag.length == 1) {
+      return p1.roundToInt()
+    }
+    
+    val c2 = tag.last()
+    val p2 = (1.0 + layout.priority(c2)).pow(3)
+    
+    val multiplier = if (layout.areOnSameSide(c1, c2)) 2 else 1
+    return (((p1 * 50) + p2 + 1000) * multiplier).roundToInt()
   }
 }

src/main/kotlin/org/acejump/search/SearchProcessor.kt

@@ -3,6 +3,7 @@ package org.acejump.search
 import com.intellij.openapi.editor.Editor
 import it.unimi.dsi.fastutil.ints.IntArrayList
 import org.acejump.boundaries.Boundaries
+import org.acejump.boundaries.EditorOffsetCache
 import org.acejump.clone
 import org.acejump.config.AceConfig
 import org.acejump.immutableText
@@ -11,25 +12,16 @@ import org.acejump.matchesAt
 /**
  * Searches editor text for matches of a [SearchQuery], and updates previous results when the user [refineQuery]s a character.
  */
-class SearchProcessor private constructor(query: SearchQuery, private val results: MutableMap<Editor, IntArrayList>) {
-  companion object {
-    fun fromString(editors: List<Editor>, query: String, boundaries: Boundaries): SearchProcessor {
-      return SearchProcessor(editors, SearchQuery.Literal(query), boundaries)
-    }
-    
-    fun fromRegex(editors: List<Editor>, pattern: String, boundaries: Boundaries): SearchProcessor {
-      return SearchProcessor(editors, SearchQuery.RegularExpression(pattern), boundaries)
-    }
-  }
-  
-  private constructor(editors: List<Editor>, query: SearchQuery, boundaries: Boundaries) : this(query, mutableMapOf()) {
-    val regex = query.toRegex()
+class SearchProcessor private constructor(query: SearchQuery, val boundaries: Boundaries, val invertUppercaseMode: Boolean, private val results: MutableMap<Editor, IntArrayList>) {
+  internal constructor(editors: List<Editor>, query: SearchQuery, boundaries: Boundaries, invertUppercaseMode: Boolean) : this(query, boundaries, invertUppercaseMode, mutableMapOf()) {
+    val regex = query.toRegex(invertUppercaseMode)
     
     if (regex != null) {
       for (editor in editors) {
+        val cache = EditorOffsetCache.new()
         val offsets = IntArrayList()
         
-        val offsetRange = boundaries.getOffsetRange(editor)
+        val offsetRange = boundaries.getOffsetRange(editor, cache)
         var result = regex.find(editor.immutableText, offsetRange.first)
         
         while (result != null) {
@@ -39,7 +31,7 @@ class SearchProcessor private constructor(query: SearchQuery, private val result
           if (highlightEnd > offsetRange.last) {
             break
           }
-          else if (boundaries.isOffsetInside(editor, index)) {
+          else if (boundaries.isOffsetInside(editor, index, cache) && !editor.foldingModel.isOffsetCollapsed(index)) {
             offsets.add(index)
           }
           
@@ -65,7 +57,7 @@ class SearchProcessor private constructor(query: SearchQuery, private val result
       return true
     }
     else {
-      query = SearchQuery.Literal(query.rawText + char)
+      query = query.refine(char)
       removeObsoleteResults()
       return isQueryFinished
     }

src/main/kotlin/org/acejump/search/SearchQuery.kt

@@ -8,6 +8,11 @@ import org.acejump.countMatchingCharacters
 internal sealed class SearchQuery {
   abstract val rawText: String
   
+  /**
+   * Returns a new query with the given character appended.
+   */
+  abstract fun refine(char: Char): SearchQuery
+  
   /**
    * Returns how many characters the search occurrence highlight should cover.
    */
@@ -16,32 +21,40 @@ internal sealed class SearchQuery {
   /**
    * Converts the query into a regular expression to find the initial matches.
    */
-  abstract fun toRegex(): Regex?
+  abstract fun toRegex(invertUppercaseMode: Boolean): Regex?
   
   /**
-   * Searches for all occurrences of a literal text query. If the first character of the query is lowercase, then the entire query will be
-   * case-insensitive.
-   *
-   * Each occurrence must either match the entire query, or match the query up to a point so that the rest of the query matches the
-   * beginning of a tag at the location of the occurrence.
+   * Searches for all occurrences of a literal text query.
+   * If the first character of the query is lowercase, then the entire query will be case-insensitive,
+   * and only beginnings of words and camel humps will be matched.
    */
   class Literal(override val rawText: String) : SearchQuery() {
     init {
       require(rawText.isNotEmpty())
     }
     
+    override fun refine(char: Char): SearchQuery {
+      return Literal(rawText + char)
+    }
+    
     override fun getHighlightLength(text: CharSequence, offset: Int): Int {
       return text.countMatchingCharacters(offset, rawText)
     }
     
-    override fun toRegex(): Regex {
-      val options = mutableSetOf(RegexOption.MULTILINE)
-      
-      if (rawText.first().isLowerCase()) {
-        options.add(RegexOption.IGNORE_CASE)
+    override fun toRegex(invertUppercaseMode: Boolean): Regex {
+      val firstChar = rawText.first()
+      val pattern = if (firstChar.isLowerCase() xor invertUppercaseMode) {
+        val fullPattern = Regex.escape(rawText)
+        "(?i)$fullPattern"
+      }
+      else {
+        val firstCharUppercasePattern = Regex.escape(firstChar.uppercase())
+        val firstCharLowercasePattern = Regex.escape(firstChar.lowercase())
+        val remainingPattern = if (rawText.length > 1) Regex.escape(rawText.drop(1)) else ""
+        "(?:$firstCharUppercasePattern|(?<![a-zA-Z])$firstCharLowercasePattern)$remainingPattern"
       }
       
-      return Regex(Regex.escape(rawText), options)
+      return Regex(pattern, setOf(RegexOption.MULTILINE))
     }
   }
   
@@ -51,11 +64,15 @@ internal sealed class SearchQuery {
   class RegularExpression(private val pattern: String) : SearchQuery() {
     override val rawText = ""
     
+    override fun refine(char: Char): SearchQuery {
+      return Literal(char.toString())
+    }
+    
     override fun getHighlightLength(text: CharSequence, offset: Int): Int {
       return 1
     }
     
-    override fun toRegex(): Regex {
+    override fun toRegex(invertUppercaseMode: Boolean): Regex {
       return Regex(pattern, setOf(RegexOption.MULTILINE, RegexOption.IGNORE_CASE))
     }
   }

src/main/kotlin/org/acejump/search/Tagger.kt

@@ -3,15 +3,13 @@ package org.acejump.search
 import com.google.common.collect.ArrayListMultimap
 import com.intellij.openapi.editor.Editor
 import it.unimi.dsi.fastutil.ints.IntList
+import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap
 import org.acejump.boundaries.EditorOffsetCache
 import org.acejump.boundaries.StandardBoundaries.VISIBLE_ON_SCREEN
-import org.acejump.immutableText
 import org.acejump.input.KeyLayoutCache
-import org.acejump.isWordPart
 import org.acejump.view.TagMarker
 import kotlin.collections.component1
 import kotlin.collections.component2
-import kotlin.math.max
 import kotlin.math.min
 
 /**
@@ -43,7 +41,7 @@ class Tagger(private val editors: List<Editor>, results: Map<Editor, IntList>) {
       .flatMap { (editor, sites) -> sites.map { site -> Tag(editor, site) } }
       .sortedWith(siteOrder(editors, caches))
     
-    tagMap = KeyLayoutCache.allPossibleTagsLowercase.zip(tagSites).toMap()
+    tagMap = generateTags(tagSites.size).zip(tagSites).toMap()
   }
   
   internal fun type(char: Char): TaggingResult {
@@ -64,6 +62,68 @@ class Tagger(private val editors: List<Editor>, results: Map<Editor, IntList>) {
   }
   
   private companion object {
+    private fun generateTags(tagCount: Int): List<String> {
+      val allowedTagsSorted = KeyLayoutCache.allowedTagsSorted
+      val tags = mutableListOf<String>()
+      
+      val containedSingleCharTags = mutableSetOf<Char>()
+      val blockedSingleCharTags = mutableSetOf<Char>()
+      val doubleCharTagCountsByFirstChar = Object2IntOpenHashMap<Char>()
+      
+      for (tag in allowedTagsSorted) {
+        val firstChar = tag.first()
+        
+        if (tag.length == 1) {
+          if (firstChar in blockedSingleCharTags) {
+            continue
+          }
+          
+          containedSingleCharTags.add(firstChar)
+        }
+        else {
+          if (containedSingleCharTags.remove(firstChar)) {
+            tags.remove(firstChar.toString())
+          }
+          
+          blockedSingleCharTags.add(firstChar)
+          doubleCharTagCountsByFirstChar.addTo(firstChar, 1)
+        }
+        
+        tags.add(tag)
+        
+        if (tags.size >= tagCount) {
+          break
+        }
+      }
+      
+      // In rare cases, the final tag list may contain a double character tag that is the only tag starting with its first character,
+      // so we replace it with the single character tag.
+      for (entry in doubleCharTagCountsByFirstChar.object2IntEntrySet()) {
+        if (entry.intValue != 1) {
+          continue
+        }
+        
+        tags.removeAt(tags.indexOfFirst { it.first() == entry.key })
+        
+        val tag = entry.key.toString()
+        var previousTagIndex = -1
+        
+        // The implementation of searching where to place the single character tag is theoretically slow,
+        // but getting here is so rare it doesn't matter.
+        for (i in allowedTagsSorted.indexOf(tag) - 1 downTo 0) {
+          previousTagIndex = tags.indexOf(allowedTagsSorted[i])
+          
+          if (previousTagIndex != -1) {
+            break
+          }
+        }
+        
+        tags.add(previousTagIndex + 1, tag)
+      }
+      
+      return tags
+    }
+    
     private fun sortResults(results: Map<Editor, IntList>, caches: Map<Editor, EditorOffsetCache>) {
       for ((editor, offsets) in results) {
         val cache = caches.getValue(editor)
@@ -92,26 +152,23 @@ class Tagger(private val editors: List<Editor>, results: Map<Editor, IntList>) {
         return@Comparator if (aEditorIndex < bEditorIndex) -1 else 1
       }
       
-      val aIsVisible = VISIBLE_ON_SCREEN.isOffsetInside(aEditor, a.offset, caches.getValue(aEditor))
-      val bIsVisible = VISIBLE_ON_SCREEN.isOffsetInside(bEditor, b.offset, caches.getValue(bEditor))
+      val aCaches = caches.getValue(aEditor)
+      val bCaches = caches.getValue(bEditor)
+      
+      val aIsVisible = VISIBLE_ON_SCREEN.isOffsetInside(aEditor, a.offset, aCaches)
+      val bIsVisible = VISIBLE_ON_SCREEN.isOffsetInside(bEditor, b.offset, bCaches)
       if (aIsVisible != bIsVisible) {
         // Sites in immediate view should come first.
         return@Comparator if (aIsVisible) -1 else 1
       }
       
-      val aIsNotWordStart = aEditor.immutableText[max(0, a.offset - 1)].isWordPart
-      val bIsNotWordStart = bEditor.immutableText[max(0, b.offset - 1)].isWordPart
-      if (aIsNotWordStart != bIsNotWordStart) {
-        // Ensure that the first letter of a word is prioritized for tagging.
-        return@Comparator if (bIsNotWordStart) -1 else 1
-      }
+      val firstEditor = editorPriority[0]
+      val caretPosition = caches.getValue(firstEditor).offsetToXY(firstEditor, firstEditor.caretModel.offset)
       
-      when {
-        a.offset < b.offset -> -1
-        a.offset > b.offset -> 1
-        else                -> 0
-      }
-    }
+      val aDistance = aCaches.offsetToXY(aEditor, a.offset).distanceSq(caretPosition)
+      val bDistance = bCaches.offsetToXY(bEditor, b.offset).distanceSq(caretPosition)
       
+      return@Comparator aDistance.compareTo(bDistance)
+    }
   }
 }

src/main/kotlin/org/acejump/session/Session.kt

@@ -113,7 +113,7 @@ class Session(private val mainEditor: Editor, private val jumpEditors: List<Edit
     }
     
     setMode(mode())
-    state = SessionState.WaitForKey(actions, jumpEditors, defaultBoundary)
+    state = SessionState.WaitForKey(actions, jumpEditors, defaultBoundary, AceConfig.invertUppercaseMode)
   }
   
   /**
@@ -128,7 +128,7 @@ class Session(private val mainEditor: Editor, private val jumpEditors: List<Edit
       canvas.setMarkers(emptyList())
     }
     
-    val processor = SearchProcessor.fromRegex(jumpEditors, pattern.regex, defaultBoundary)
+    val processor = SearchProcessor(jumpEditors, SearchQuery.RegularExpression(pattern.regex), defaultBoundary, AceConfig.invertUppercaseMode)
     textHighlighter.renderOccurrences(processor.resultsCopy, processor.query)
     
     state = SessionState.SelectTag(actions, jumpEditors, processor)

src/main/kotlin/org/acejump/session/SessionState.kt

@@ -2,7 +2,10 @@ package org.acejump.session
 
 import com.intellij.openapi.editor.Editor
 import org.acejump.boundaries.Boundaries
+import org.acejump.boundaries.StandardBoundaries
+import org.acejump.config.AceConfig
 import org.acejump.search.SearchProcessor
+import org.acejump.search.SearchQuery
 import org.acejump.search.Tagger
 import org.acejump.search.TaggingResult
 
@@ -13,9 +16,10 @@ sealed interface SessionState {
     private val actions: SessionActions,
     private val jumpEditors: List<Editor>,
     private val defaultBoundary: Boundaries,
+    private val invertUppercaseMode: Boolean,
   ) : SessionState {
     override fun type(char: Char): TypeResult {
-      val searchProcessor = SearchProcessor.fromString(jumpEditors, char.toString(), defaultBoundary)
+      val searchProcessor = SearchProcessor(jumpEditors, SearchQuery.Literal(char.toString()), defaultBoundary, invertUppercaseMode)
       
       return if (searchProcessor.isQueryFinished) {
         TypeResult.ChangeState(SelectTag(actions, jumpEditors, searchProcessor))
@@ -49,8 +53,8 @@ sealed interface SessionState {
   
   class SelectTag internal constructor(
     private val actions: SessionActions,
-    jumpEditors: List<Editor>,
-    searchProcessor: SearchProcessor,
+    private val jumpEditors: List<Editor>,
+    private val searchProcessor: SearchProcessor,
   ) : SessionState {
     private val tagger = Tagger(jumpEditors, searchProcessor.resultsCopy)
     
@@ -59,7 +63,26 @@ sealed interface SessionState {
     }
     
     override fun type(char: Char): TypeResult {
-      return when (val result = tagger.type(char)) {
+      if (char == ' ') {
+        val query = searchProcessor.query
+        if (query is SearchQuery.Literal) {
+          val newBoundaries = when (searchProcessor.boundaries) {
+            StandardBoundaries.VISIBLE_ON_SCREEN -> StandardBoundaries.AFTER_CARET
+            StandardBoundaries.AFTER_CARET       -> StandardBoundaries.BEFORE_CARET
+            StandardBoundaries.BEFORE_CARET      -> StandardBoundaries.VISIBLE_ON_SCREEN
+            else                                 -> searchProcessor.boundaries
+          }
+          
+          val newSearchProcessor = SearchProcessor(jumpEditors, query, newBoundaries, searchProcessor.invertUppercaseMode)
+          return TypeResult.ChangeState(SelectTag(actions, jumpEditors, newSearchProcessor))
+        }
+      }
+      else if (char == '\n') {
+        val newSearchProcessor = SearchProcessor(jumpEditors, searchProcessor.query, searchProcessor.boundaries, !searchProcessor.invertUppercaseMode)
+        return TypeResult.ChangeState(SelectTag(actions, jumpEditors, newSearchProcessor))
+      }
+      
+      return when (val result = tagger.type(AceConfig.layout.characterRemapping.getOrDefault(char, char))) {
         is TaggingResult.Nothing -> TypeResult.Nothing
         is TaggingResult.Accept  -> TypeResult.AcceptTag(result.tag)
         is TaggingResult.Mark    -> {

src/main/kotlin/org/acejump/view/TagCanvas.kt

@@ -5,6 +5,7 @@ import com.intellij.openapi.editor.Editor
 import com.intellij.ui.ColorUtil
 import org.acejump.boundaries.EditorOffsetCache
 import org.acejump.boundaries.StandardBoundaries
+import org.acejump.config.AceConfig
 import java.awt.Graphics
 import java.awt.Graphics2D
 import java.awt.Rectangle
@@ -53,7 +54,7 @@ internal class TagCanvas(private val editor: Editor) : JComponent() {
       return
     }
     
-    g.color = ColorUtil.withAlpha(editor.colorsScheme.defaultBackground, 0.6)
+    g.color = ColorUtil.withAlpha(editor.colorsScheme.defaultBackground, (AceConfig.editorFadeOpacity * 0.01).coerceIn(0.0, 1.0))
     g.fillRect(0, 0, width - 1, height - 1)
     
     if (markers.isEmpty()) {

src/main/kotlin/org/acejump/view/TagMarker.kt

@@ -12,10 +12,13 @@ import java.awt.Rectangle
  * Describes a 1 or 2 character shortcut that points to a specific character in the editor.
  */
 internal class TagMarker(
-  private val tag: CharArray,
+  private val firstChar: String,
+  private val secondChar: String,
   val offset: Int
 ) {
-  private val length = tag.size
+  private constructor(tag: String, offset: Int) : this(tag.first().toString(), tag.drop(1), offset)
+  
+  private val length = firstChar.length + secondChar.length
   
   companion object {
     /**
@@ -28,7 +31,7 @@ internal class TagMarker(
      * character ([typedTag]) matches the first [tag] character, only the second [tag] character is displayed.
      */
     fun create(tag: String, offset: Int, typedTag: String): TagMarker {
-      return TagMarker(tag.drop(typedTag.length).toCharArray(), offset)
+      return TagMarker(tag.drop(typedTag.length), offset)
     }
   }
   
@@ -65,11 +68,11 @@ internal class TagMarker(
     
     g.font = font.tagFont
     g.color = font.foregroundColor1
-    g.drawChars(tag, 0, 1, x, y)
+    g.drawString(firstChar, x, y)
     
-    if (tag.size > 1) {
+    if (secondChar.isNotEmpty()) {
       g.color = font.foregroundColor2
-      g.drawChars(tag, 1, length - 1, x + font.tagCharWidth, y)
+      g.drawString(secondChar, x + font.tagCharWidth, y)
     }
   }