Implement undo/redo for selecting entries

build.gradle.kts

@@ -32,6 +32,7 @@ dependencies {
     implementation(libs.segment)
 
     implementation(libs.ikonli.javafx)
+    implementation(libs.ikonli.material2)
 
     implementation(libs.slf4j.nop)
 
@@ -50,6 +51,7 @@ kotlin {
 javafx {
     version = libs.versions.javafx.get()
     modules("javafx.base", "javafx.graphics", "javafx.controls", "javafx.fxml", "javafx.web")
+//    setPlatform("mac")
 }
 
 detekt {

gradle/libs.versions.toml

@@ -36,6 +36,7 @@ segment = { module = "com.github.houbb:segment", version.ref = "segment" }
 slf4j-nop = { module = "org.slf4j:slf4j-nop", version.ref = "slf4j" }
 
 ikonli-javafx = { module = "org.kordamp.ikonli:ikonli-javafx", version.ref = "ikonli-javafx" }
+ikonli-material2 = { group = "org.kordamp.ikonli", name = "ikonli-material2-pack", version.ref = "ikonli-javafx" }
 
 # Detekt
 # See: https://detekt.dev

src/main/kotlin/com/marvinelsen/willow/Model.kt

@@ -2,10 +2,10 @@ package com.marvinelsen.willow
 
 import com.marvinelsen.willow.domain.SearchMode
 import com.marvinelsen.willow.domain.SqliteDictionary
-import com.marvinelsen.willow.ui.DictionaryEntryFx
-import com.marvinelsen.willow.ui.SentenceFx
-import com.marvinelsen.willow.ui.toDomain
-import com.marvinelsen.willow.ui.toFx
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
+import com.marvinelsen.willow.domain.entities.Sentence
+import com.marvinelsen.willow.ui.undo.Command
+import com.marvinelsen.willow.ui.undo.UndoManager
 import com.marvinelsen.willow.ui.util.ClipboardHelper
 import javafx.beans.property.BooleanProperty
 import javafx.beans.property.ObjectProperty
@@ -18,15 +18,17 @@ import javafx.collections.ObservableList
 import kotlinx.coroutines.MainScope
 import kotlinx.coroutines.launch
 
+@Suppress("TooManyFunctions")
 class Model(
     private val dictionary: SqliteDictionary,
+    private val undoManager: UndoManager,
 ) {
-    private val internalSelectedEntry: ObjectProperty<DictionaryEntryFx> = SimpleObjectProperty()
-    private val internalSearchResults: ObservableList<DictionaryEntryFx> = FXCollections.observableArrayList()
-    private val internalWordsBeginning: ObservableList<DictionaryEntryFx> = FXCollections.observableArrayList()
-    private val internalWordsContaining: ObservableList<DictionaryEntryFx> = FXCollections.observableArrayList()
-    private val internalCharacters: ObservableList<DictionaryEntryFx> = FXCollections.observableArrayList()
-    private val internalSentences: ObservableList<SentenceFx> = FXCollections.observableArrayList()
+    private val internalSelectedEntry: ObjectProperty<DictionaryEntry> = SimpleObjectProperty()
+    private val internalSearchResults: ObservableList<DictionaryEntry> = FXCollections.observableArrayList()
+    private val internalWordsBeginning: ObservableList<DictionaryEntry> = FXCollections.observableArrayList()
+    private val internalWordsContaining: ObservableList<DictionaryEntry> = FXCollections.observableArrayList()
+    private val internalCharacters: ObservableList<DictionaryEntry> = FXCollections.observableArrayList()
+    private val internalSentences: ObservableList<Sentence> = FXCollections.observableArrayList()
 
     private val internalIsSearching: BooleanProperty = SimpleBooleanProperty(false)
     private val internalIsFindingWordsBeginning: BooleanProperty = SimpleBooleanProperty(false)
@@ -39,17 +41,20 @@ class Model(
     private val internalFinishedFindingCharacters: BooleanProperty = SimpleBooleanProperty(false)
     private val internalFinishedFindingSentences: BooleanProperty = SimpleBooleanProperty(false)
 
-    val selectedEntry: ReadOnlyObjectProperty<DictionaryEntryFx> = internalSelectedEntry
+    val canUndo: ReadOnlyBooleanProperty = undoManager.canUndoProperty
+    val canRedo: ReadOnlyBooleanProperty = undoManager.canRedoProperty
 
-    val searchResults: ObservableList<DictionaryEntryFx> =
+    val selectedEntry: ReadOnlyObjectProperty<DictionaryEntry> = internalSelectedEntry
+
+    val searchResults: ObservableList<DictionaryEntry> =
         FXCollections.unmodifiableObservableList(internalSearchResults)
-    val wordsBeginning: ObservableList<DictionaryEntryFx> =
+    val wordsBeginning: ObservableList<DictionaryEntry> =
         FXCollections.unmodifiableObservableList(internalWordsBeginning)
-    val wordsContaining: ObservableList<DictionaryEntryFx> =
+    val wordsContaining: ObservableList<DictionaryEntry> =
         FXCollections.unmodifiableObservableList(internalWordsContaining)
-    val characters: ObservableList<DictionaryEntryFx> =
+    val characters: ObservableList<DictionaryEntry> =
         FXCollections.unmodifiableObservableList(internalCharacters)
-    val sentences: ObservableList<SentenceFx> =
+    val sentences: ObservableList<Sentence> =
         FXCollections.unmodifiableObservableList(internalSentences)
 
     val isSearching: ReadOnlyBooleanProperty = internalIsSearching
@@ -65,10 +70,26 @@ class Model(
 
     private val coroutineScope = MainScope()
 
+    fun copyHeadwordOfSelectedEntry() {
+        ClipboardHelper.copyString(internalSelectedEntry.value.traditional)
+    }
+
+    fun copyPronunciationOfSelectedEntry() {
+        ClipboardHelper.copyString(internalSelectedEntry.value.pinyinWithToneMarks)
+    }
+
+    fun undoSelection() {
+        undoManager.undo()
+    }
+
+    fun redoSelection() {
+        undoManager.redo()
+    }
+
     fun search(query: String, searchMode: SearchMode) {
         coroutineScope.launch {
             internalIsSearching.value = true
-            internalSearchResults.setAll(dictionary.search(query, searchMode).map { it.toFx() })
+            internalSearchResults.setAll(dictionary.search(query, searchMode))
             internalIsSearching.value = false
         }
     }
@@ -78,8 +99,7 @@ class Model(
             internalIsFindingWordsBeginning.value = true
             internalWordsBeginning.setAll(
                 dictionary
-                    .findWordsBeginningWith(internalSelectedEntry.value.toDomain())
-                    .map { it.toFx() }
+                    .findWordsBeginningWith(internalSelectedEntry.value)
             )
             internalIsFindingWordsBeginning.value = false
             internalFinishedFindingWordsBeginning.value = true
@@ -91,8 +111,7 @@ class Model(
             internalIsFindingWordsContaining.value = true
             internalWordsContaining.setAll(
                 dictionary
-                    .findWordsContaining(internalSelectedEntry.value.toDomain())
-                    .map { it.toFx() }
+                    .findWordsContaining(internalSelectedEntry.value)
             )
             internalIsFindingWordsContaining.value = false
             internalFinishedFindingWordsContaining.value = true
@@ -104,8 +123,7 @@ class Model(
             internalIsFindingCharacters.value = true
             internalCharacters.setAll(
                 dictionary
-                    .findCharactersOf(internalSelectedEntry.value.toDomain())
-                    .map { it.toFx() }
+                    .findCharactersOf(internalSelectedEntry.value)
             )
             internalIsFindingCharacters.value = false
             internalFinishedFindingCharacters.value = true
@@ -117,20 +135,30 @@ class Model(
             internalIsFindingSentences.value = true
             internalSentences.setAll(
                 dictionary
-                    .findExampleSentencesFor(internalSelectedEntry.value.toDomain())
-                    .map { it.toFx() }
+                    .findExampleSentencesFor(internalSelectedEntry.value)
             )
             internalIsFindingSentences.value = false
             internalFinishedFindingSentences.value = true
         }
     }
 
-    fun selectEntry(entry: DictionaryEntryFx) {
-        internalWordsBeginning.setAll(emptyList())
-        internalWordsContaining.setAll(emptyList())
-        internalCharacters.setAll(emptyList())
-        internalSentences.setAll(emptyList())
+    fun selectEntry(entry: DictionaryEntry) {
+        undoManager.execute(object : Command {
+            private val previouslySelectedEntry = internalSelectedEntry.value
 
+            override fun execute() {
+                select(entry)
+            }
+
+            override fun undo() {
+                if (previouslySelectedEntry == null) return
+
+                select(previouslySelectedEntry)
+            }
+        })
+    }
+
+    private fun select(entry: DictionaryEntry) {
         internalFinishedFindingCharacters.value = false
         internalFinishedFindingWordsBeginning.value = false
         internalFinishedFindingWordsContaining.value = false
@@ -138,12 +166,4 @@ class Model(
 
         internalSelectedEntry.value = entry
     }
-
-    fun copyHeadwordOfSelectedEntry() {
-        ClipboardHelper.copyString(internalSelectedEntry.value.traditionalProperty.value)
-    }
-
-    fun copyPronunciationOfSelectedEntry() {
-        ClipboardHelper.copyString(internalSelectedEntry.value.pinyinWithToneMarksProperty.value)
-    }
 }

src/main/kotlin/com/marvinelsen/willow/WillowApplication.kt

@@ -7,6 +7,7 @@ import com.marvinelsen.willow.ui.controllers.MainController
 import com.marvinelsen.willow.ui.controllers.MenuController
 import com.marvinelsen.willow.ui.controllers.SearchController
 import com.marvinelsen.willow.ui.controllers.SearchResultsController
+import com.marvinelsen.willow.ui.undo.UndoManager
 import javafx.application.Application
 import javafx.application.HostServices
 import javafx.fxml.FXMLLoader
@@ -41,8 +42,10 @@ class WillowApplication : Application() {
             autoCommit = false
         }
         val dictionary = SqliteDictionary(connection)
+        val undoManager = UndoManager()
         val model = Model(
             dictionary,
+            undoManager
         )
         val config = Config()
         config.load()

src/main/kotlin/com/marvinelsen/willow/domain/Dictionary.kt

@@ -1,5 +1,8 @@
 package com.marvinelsen.willow.domain
 
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
+import com.marvinelsen.willow.domain.entities.Sentence
+
 interface Dictionary {
     suspend fun search(query: String, searchMode: SearchMode): List<DictionaryEntry>
 

src/main/kotlin/com/marvinelsen/willow/domain/SqliteDictionary.kt

@@ -8,6 +8,8 @@ import com.github.houbb.segment.support.segment.impl.Segments
 import com.github.houbb.segment.support.segment.mode.impl.SegmentModes
 import com.github.houbb.segment.support.segment.result.impl.SegmentResultHandlers
 import com.github.houbb.segment.support.tagging.pos.tag.impl.SegmentPosTaggings
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
+import com.marvinelsen.willow.domain.entities.Sentence
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import kotlinx.serialization.json.Json

src/main/kotlin/com/marvinelsen/willow/domain/entities/DictionaryEntry.kt

@@ -1,4 +1,7 @@
-package com.marvinelsen.willow.domain
+package com.marvinelsen.willow.domain.entities
+
+import com.marvinelsen.willow.domain.entities.definitions.CrossStraitsDefinition
+import com.marvinelsen.willow.domain.entities.definitions.MoedictDefinition
 
 data class DictionaryEntry(
     val traditional: String,

src/main/kotlin/com/marvinelsen/willow/domain/entities/Sentence.kt

@@ -1,4 +1,4 @@
-package com.marvinelsen.willow.domain
+package com.marvinelsen.willow.domain.entities
 
 data class Sentence(
     val traditional: String,

src/main/kotlin/com/marvinelsen/willow/domain/entities/definitions/CrossStraitsDefinition.kt

@@ -1,4 +1,4 @@
-package com.marvinelsen.willow.domain
+package com.marvinelsen.willow.domain.entities.definitions
 
 import kotlinx.serialization.Serializable
 

src/main/kotlin/com/marvinelsen/willow/domain/entities/definitions/MoedictDefinition.kt

@@ -1,4 +1,4 @@
-package com.marvinelsen.willow.domain
+package com.marvinelsen.willow.domain.entities.definitions
 
 import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable

src/main/kotlin/com/marvinelsen/willow/ui/DictionaryEntryFx.kt

@@ -1,42 +0,0 @@
-package com.marvinelsen.willow.ui
-
-import com.marvinelsen.willow.domain.CrossStraitsDefinition
-import com.marvinelsen.willow.domain.DictionaryEntry
-import com.marvinelsen.willow.domain.MoedictDefinition
-import javafx.beans.property.SimpleStringProperty
-import javafx.beans.property.StringProperty
-import javafx.collections.FXCollections
-import javafx.collections.ObservableList
-
-data class DictionaryEntryFx(
-    val traditionalProperty: StringProperty,
-    val simplifiedProperty: StringProperty,
-    val pinyinWithToneMarksProperty: StringProperty,
-    val pinyinWithToneNumbersProperty: StringProperty,
-    val zhuyinProperty: StringProperty,
-    val cedictDefinitions: ObservableList<List<String>>,
-    val crossStraitsDefinitions: ObservableList<CrossStraitsDefinition>,
-    val moedictDefinitions: ObservableList<MoedictDefinition>,
-)
-
-fun DictionaryEntry.toFx() = DictionaryEntryFx(
-    traditionalProperty = SimpleStringProperty(this.traditional),
-    simplifiedProperty = SimpleStringProperty(this.simplified),
-    pinyinWithToneMarksProperty = SimpleStringProperty(this.pinyinWithToneMarks),
-    pinyinWithToneNumbersProperty = SimpleStringProperty(this.pinyinWithToneNumbers),
-    zhuyinProperty = SimpleStringProperty(this.zhuyin),
-    cedictDefinitions = FXCollections.observableList(this.cedictDefinitions),
-    crossStraitsDefinitions = FXCollections.observableList(this.crossStraitsDefinitions),
-    moedictDefinitions = FXCollections.observableList(this.moedictDefinitions),
-)
-
-fun DictionaryEntryFx.toDomain() = DictionaryEntry(
-    traditional = this.traditionalProperty.value,
-    simplified = this.simplifiedProperty.value,
-    pinyinWithToneMarks = this.pinyinWithToneMarksProperty.value,
-    pinyinWithToneNumbers = this.pinyinWithToneNumbersProperty.value,
-    zhuyin = this.zhuyinProperty.value,
-    cedictDefinitions = this.cedictDefinitions.toList(),
-    crossStraitsDefinitions = this.crossStraitsDefinitions.toList(),
-    moedictDefinitions = this.moedictDefinitions.toList(),
-)

src/main/kotlin/com/marvinelsen/willow/ui/SentenceFx.kt

@@ -1,20 +0,0 @@
-package com.marvinelsen.willow.ui
-
-import com.marvinelsen.willow.domain.Sentence
-import javafx.beans.property.SimpleStringProperty
-import javafx.beans.property.StringProperty
-
-data class SentenceFx(
-    val traditionalProperty: StringProperty,
-    val simplifiedProperty: StringProperty,
-)
-
-fun Sentence.toFx() = SentenceFx(
-    traditionalProperty = SimpleStringProperty(this.traditional),
-    simplifiedProperty = SimpleStringProperty(this.simplified),
-)
-
-fun SentenceFx.toDomain() = Sentence(
-    traditional = this.traditionalProperty.value,
-    simplified = this.simplifiedProperty.value,
-)

src/main/kotlin/com/marvinelsen/willow/ui/cells/DictionaryEntryCellFactory.kt

@@ -3,7 +3,7 @@ package com.marvinelsen.willow.ui.cells
 import com.marvinelsen.willow.config.Config
 import com.marvinelsen.willow.config.Pronunciation
 import com.marvinelsen.willow.config.Script
-import com.marvinelsen.willow.ui.DictionaryEntryFx
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
 import com.marvinelsen.willow.ui.util.createContextMenuForEntry
 import javafx.application.HostServices
 import javafx.beans.binding.Bindings
@@ -20,9 +20,9 @@ class DictionaryEntryCellFactory(
     private val resources: ResourceBundle,
     private val config: Config,
     private val hostServices: HostServices,
-) : Callback<ListView<DictionaryEntryFx?>, ListCell<DictionaryEntryFx?>> {
+) : Callback<ListView<DictionaryEntry?>, ListCell<DictionaryEntry?>> {
 
-    override fun call(listView: ListView<DictionaryEntryFx?>): ListCell<DictionaryEntryFx?> {
+    override fun call(listView: ListView<DictionaryEntry?>): ListCell<DictionaryEntry?> {
         val entryCell = EntryCell(resources, config, hostServices)
         entryCell.prefWidthProperty().bind(listView.widthProperty().subtract(CELL_PADDING))
         return entryCell
@@ -37,59 +37,69 @@ private class EntryCell(
     private val resources: ResourceBundle,
     private val config: Config,
     private val hostServices: HostServices,
-) : ListCell<DictionaryEntryFx?>() {
+) : ListCell<DictionaryEntry?>() {
 
-    private val labelHeadword = Label().apply {
-        styleClass.add("headword")
-        styleProperty().bind(
-            Bindings.concat(
-                "-fx-font-size: ",
-                config.searchResults.headwordFontSize.asString(),
-                "px;"
+    private val labelHeadword by lazy {
+        Label().apply {
+            styleClass.add("headword")
+            styleProperty().bind(
+                Bindings.concat(
+                    "-fx-font-size: ",
+                    config.searchResults.headwordFontSize.asString(),
+                    "px;"
+                )
             )
-        )
+        }
     }
 
-    private val labelDefinition = Label().apply {
-        styleClass.add("definition")
-        styleProperty().bind(
-            Bindings.concat(
-                "-fx-font-size: ",
-                config.searchResults.definitionFontSize.asString(),
-                "px;"
+    private val labelDefinition by lazy {
+        Label().apply {
+            styleClass.add("definition")
+            styleProperty().bind(
+                Bindings.concat(
+                    "-fx-font-size: ",
+                    config.searchResults.definitionFontSize.asString(),
+                    "px;"
+                )
             )
-        )
-        visibleProperty().bind(config.searchResults.shouldShowDefinition)
-        managedProperty().bind(config.searchResults.shouldShowDefinition)
+            visibleProperty().bind(config.searchResults.shouldShowDefinition)
+            managedProperty().bind(config.searchResults.shouldShowDefinition)
+        }
     }
 
-    private val labelPronunciation = Label().apply {
-        styleClass.add("pronunciation")
-        styleProperty().bind(
-            Bindings.concat(
-                "-fx-font-size: ",
-                config.searchResults.pronunciationFontSize.asString(),
-                "px;"
+    private val labelPronunciation by lazy {
+        Label().apply {
+            styleClass.add("pronunciation")
+            styleProperty().bind(
+                Bindings.concat(
+                    "-fx-font-size: ",
+                    config.searchResults.pronunciationFontSize.asString(),
+                    "px;"
+                )
             )
-        )
-        visibleProperty().bind(config.searchResults.shouldShowPronunciation)
-        managedProperty().bind(config.searchResults.shouldShowPronunciation)
+            visibleProperty().bind(config.searchResults.shouldShowPronunciation)
+            managedProperty().bind(config.searchResults.shouldShowPronunciation)
+        }
     }
 
-    private val flowPane = FlowPane(labelHeadword, labelPronunciation).apply {
-        hgap = FLOW_PANE_HGAP
-        rowValignment = VPos.BASELINE
+    private val flowPane by lazy {
+        FlowPane(labelHeadword, labelPronunciation).apply {
+            hgap = FLOW_PANE_HGAP
+            rowValignment = VPos.BASELINE
+        }
     }
 
-    private val root = VBox(flowPane, labelDefinition).apply {
-        styleClass.add("search-result")
+    private val root by lazy {
+        VBox(flowPane, labelDefinition).apply {
+            styleClass.add("search-result")
+        }
     }
 
     init {
         text = null
     }
 
-    override fun updateItem(entry: DictionaryEntryFx?, empty: Boolean) {
+    override fun updateItem(entry: DictionaryEntry?, empty: Boolean) {
         super.updateItem(entry, empty)
         if (empty || entry == null) {
             graphic = null
@@ -99,8 +109,8 @@ private class EntryCell(
                 Bindings.createStringBinding(
                     {
                         when (config.script.value!!) {
-                            Script.SIMPLIFIED -> entry.simplifiedProperty.value
-                            Script.TRADITIONAL -> entry.traditionalProperty.value
+                            Script.SIMPLIFIED -> entry.simplified
+                            Script.TRADITIONAL -> entry.traditional
                         }
                     },
                     config.script
@@ -110,9 +120,9 @@ private class EntryCell(
                 Bindings.createStringBinding(
                     {
                         when (config.searchResults.pronunciation.value!!) {
-                            Pronunciation.PINYIN_WITH_TONE_MARKS -> entry.pinyinWithToneMarksProperty.value
-                            Pronunciation.PINYIN_WITH_TONE_NUMBERS -> entry.pinyinWithToneNumbersProperty.value
-                            Pronunciation.ZHUYIN -> entry.zhuyinProperty.value
+                            Pronunciation.PINYIN_WITH_TONE_MARKS -> entry.pinyinWithToneMarks
+                            Pronunciation.PINYIN_WITH_TONE_NUMBERS -> entry.pinyinWithToneNumbers
+                            Pronunciation.ZHUYIN -> entry.zhuyin
                         }
                     },
                     config.searchResults.pronunciation

src/main/kotlin/com/marvinelsen/willow/ui/cells/SentenceCellFactory.kt

@@ -2,7 +2,7 @@ package com.marvinelsen.willow.ui.cells
 
 import com.marvinelsen.willow.config.Config
 import com.marvinelsen.willow.config.Script
-import com.marvinelsen.willow.ui.SentenceFx
+import com.marvinelsen.willow.domain.entities.Sentence
 import com.marvinelsen.willow.ui.util.createContextMenuForSentence
 import javafx.application.HostServices
 import javafx.beans.binding.Bindings
@@ -17,9 +17,9 @@ class SentenceCellFactory(
     private val resources: ResourceBundle,
     private val config: Config,
     private val hostServices: HostServices,
-) : Callback<ListView<SentenceFx?>, ListCell<SentenceFx?>> {
+) : Callback<ListView<Sentence?>, ListCell<Sentence?>> {
 
-    override fun call(listView: ListView<SentenceFx?>): ListCell<SentenceFx?> {
+    override fun call(listView: ListView<Sentence?>): ListCell<Sentence?> {
         val sentenceCell = SentenceCell(resources, config, hostServices)
         sentenceCell.prefWidthProperty().bind(listView.widthProperty().subtract(CELL_PADDING))
         return sentenceCell
@@ -34,29 +34,35 @@ private class SentenceCell(
     private val resources: ResourceBundle,
     private val config: Config,
     private val hostServices: HostServices,
-) : ListCell<SentenceFx?>() {
+) : ListCell<Sentence?>() {
 
-    private val labelSentence = Label().apply {
-        styleClass.add("sentence")
-        isWrapText = true
+    private val labelSentence by lazy {
+        Label().apply {
+            styleClass.add("sentence")
+            isWrapText = true
+        }
+    }
+
+    private val root by lazy {
+        VBox(labelSentence)
     }
-    private val root = VBox(labelSentence)
 
     init {
         text = null
     }
 
-    override fun updateItem(sentence: SentenceFx?, empty: Boolean) {
+    override fun updateItem(sentence: Sentence?, empty: Boolean) {
         super.updateItem(sentence, empty)
         if (empty || sentence == null) {
             graphic = null
+            contextMenu = null
         } else {
             labelSentence.textProperty().bind(
                 Bindings.createStringBinding(
                     {
                         when (config.script.value!!) {
-                            Script.SIMPLIFIED -> sentence.simplifiedProperty.value
-                            Script.TRADITIONAL -> sentence.traditionalProperty.value
+                            Script.SIMPLIFIED -> sentence.simplified
+                            Script.TRADITIONAL -> sentence.traditional
                         }
                     },
                     config.script

src/main/kotlin/com/marvinelsen/willow/ui/controllers/DetailsController.kt

@@ -4,8 +4,8 @@ import com.marvinelsen.willow.Model
 import com.marvinelsen.willow.config.Config
 import com.marvinelsen.willow.config.Pronunciation
 import com.marvinelsen.willow.config.Script
-import com.marvinelsen.willow.ui.DictionaryEntryFx
-import com.marvinelsen.willow.ui.SentenceFx
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
+import com.marvinelsen.willow.domain.entities.Sentence
 import com.marvinelsen.willow.ui.cells.DictionaryEntryCellFactory
 import com.marvinelsen.willow.ui.cells.SentenceCellFactory
 import com.marvinelsen.willow.ui.util.createContextMenuForEntry
@@ -60,13 +60,13 @@ class DetailsController(
     private lateinit var webViewDefinition: WebView
 
     @FXML
-    private lateinit var listViewWordsContaining: ListView<DictionaryEntryFx>
+    private lateinit var listViewWordsContaining: ListView<DictionaryEntry>
 
     @FXML
-    private lateinit var listViewWordsBeginning: ListView<DictionaryEntryFx>
+    private lateinit var listViewWordsBeginning: ListView<DictionaryEntry>
 
     @FXML
-    private lateinit var listViewCharacters: ListView<DictionaryEntryFx>
+    private lateinit var listViewCharacters: ListView<DictionaryEntry>
 
     @FXML
     private lateinit var progressIndicatorCharacters: ProgressIndicator
@@ -87,7 +87,7 @@ class DetailsController(
     private lateinit var labelNoWordsBeginningFound: Label
 
     @FXML
-    private lateinit var listViewSentences: ListView<SentenceFx>
+    private lateinit var listViewSentences: ListView<Sentence>
 
     @FXML
     private lateinit var progressIndicatorSentences: ProgressIndicator
@@ -114,8 +114,8 @@ class DetailsController(
                     {
                         val selectedEntry = model.selectedEntry.value
                         when (config.script.value!!) {
-                            Script.SIMPLIFIED -> selectedEntry?.simplifiedProperty?.value
-                            Script.TRADITIONAL -> selectedEntry?.traditionalProperty?.value
+                            Script.SIMPLIFIED -> selectedEntry?.simplified
+                            Script.TRADITIONAL -> selectedEntry?.traditional
                         }
                     },
                     config.script,
@@ -139,20 +139,9 @@ class DetailsController(
                     {
                         val selectedEntry = model.selectedEntry.value
                         when (config.details.pronunciation.value!!) {
-                            Pronunciation.PINYIN_WITH_TONE_MARKS ->
-                                selectedEntry
-                                    ?.pinyinWithToneMarksProperty
-                                    ?.value
-
-                            Pronunciation.PINYIN_WITH_TONE_NUMBERS ->
-                                selectedEntry
-                                    ?.pinyinWithToneNumbersProperty
-                                    ?.value
-
-                            Pronunciation.ZHUYIN ->
-                                selectedEntry
-                                    ?.zhuyinProperty
-                                    ?.value
+                            Pronunciation.PINYIN_WITH_TONE_MARKS -> selectedEntry?.pinyinWithToneMarks
+                            Pronunciation.PINYIN_WITH_TONE_NUMBERS -> selectedEntry?.pinyinWithToneNumbers
+                            Pronunciation.ZHUYIN -> selectedEntry?.zhuyin
                         }
                     },
                     config.details.pronunciation,
@@ -183,13 +172,13 @@ class DetailsController(
         model.selectedEntry.addListener { _, _, newEntry ->
             if (newEntry == null) return@addListener
 
-            lazyUpdateTabContent(tabPaneDetails.selectionModel.selectedItem.id)
+            tabPaneDetails.selectionModel.select(0)
         }
 
         tabCharacters.disableProperty().bind(
             Bindings.createBooleanBinding(
                 {
-                    (model.selectedEntry.value?.traditionalProperty?.value?.length ?: 0) < 2
+                    (model.selectedEntry.value?.traditional?.length ?: 0) < 2
                 },
                 model.selectedEntry
             )
@@ -215,6 +204,11 @@ class DetailsController(
             items = model.wordsContaining
 
             disableProperty().bind(Bindings.or(model.isFindingWordsContaining, Bindings.isEmpty(model.wordsContaining)))
+
+            selectionModel.selectedItemProperty().addListener { _, _, newEntry ->
+                if (newEntry == null) return@addListener
+                model.selectEntry(newEntry)
+            }
         }
         progressIndicatorWordsContaining.visibleProperty().bind(model.isFindingWordsContaining)
         labelNoWordsContainingFound
@@ -228,6 +222,11 @@ class DetailsController(
             items = model.wordsBeginning
 
             disableProperty().bind(Bindings.or(model.isFindingWordsBeginning, Bindings.isEmpty(model.wordsBeginning)))
+
+            selectionModel.selectedItemProperty().addListener { _, _, newEntry ->
+                if (newEntry == null) return@addListener
+                model.selectEntry(newEntry)
+            }
         }
         progressIndicatorWordsBeginning.visibleProperty().bind(model.isFindingWordsBeginning)
         labelNoWordsBeginningFound
@@ -241,6 +240,11 @@ class DetailsController(
             items = model.characters
 
             disableProperty().bind(Bindings.or(model.isFindingCharacters, Bindings.isEmpty(model.characters)))
+
+            selectionModel.selectedItemProperty().addListener { _, _, newEntry ->
+                if (newEntry == null) return@addListener
+                model.selectEntry(newEntry)
+            }
         }
         progressIndicatorCharacters.visibleProperty().bind(model.isFindingCharacters)
         labelNoCharactersFound
@@ -299,7 +303,7 @@ class DetailsController(
         }
     }
 
-    private fun createDefinitionHtml(entry: DictionaryEntryFx) = createHTML().html {
+    private fun createDefinitionHtml(entry: DictionaryEntry) = createHTML().html {
         body {
             if (entry.cedictDefinitions.isNotEmpty()) {
                 div(classes = "cedict-definition") {
@@ -331,7 +335,7 @@ class DetailsController(
     }
 }
 
-private fun DIV.cedictDefinition(entry: DictionaryEntryFx) = ol {
+private fun DIV.cedictDefinition(entry: DictionaryEntry) = ol {
     for (definition in entry.cedictDefinitions) {
         li {
             +definition.joinToString(separator = "; ")
@@ -339,7 +343,7 @@ private fun DIV.cedictDefinition(entry: DictionaryEntryFx) = ol {
     }
 }
 
-private fun DIV.crossStraitsDefinition(entry: DictionaryEntryFx) = ol {
+private fun DIV.crossStraitsDefinition(entry: DictionaryEntry) = ol {
     entry.crossStraitsDefinitions.forEach { definition ->
         li {
             span(classes = "definition") {
@@ -358,7 +362,7 @@ private fun DIV.crossStraitsDefinition(entry: DictionaryEntryFx) = ol {
     }
 }
 
-private fun DIV.moeDefinition(entry: DictionaryEntryFx) =
+private fun DIV.moeDefinition(entry: DictionaryEntry) =
     entry.moedictDefinitions.groupBy { it.type ?: "" }.entries.forEach { (type, definitions) ->
         if (type != "") {
             span(classes = "type") {

src/main/kotlin/com/marvinelsen/willow/ui/controllers/SearchController.kt

@@ -3,10 +3,17 @@ package com.marvinelsen.willow.ui.controllers
 import com.marvinelsen.willow.Model
 import com.marvinelsen.willow.domain.SearchMode
 import javafx.fxml.FXML
+import javafx.scene.control.Button
 import javafx.scene.control.TextField
 import javafx.scene.control.ToggleGroup
 
 class SearchController(private val model: Model) {
+    @FXML
+    private lateinit var buttonUndo: Button
+
+    @FXML
+    private lateinit var buttonRedo: Button
+
     @FXML
     private lateinit var searchModeToggleGroup: ToggleGroup
 
@@ -18,6 +25,9 @@ class SearchController(private val model: Model) {
     private fun initialize() {
         textFieldSearch.textProperty().addListener { _, _, _ -> search() }
         searchModeToggleGroup.selectedToggleProperty().addListener { _, _, _ -> search() }
+
+        buttonUndo.disableProperty().bind(model.canUndo.not())
+        buttonRedo.disableProperty().bind(model.canRedo.not())
     }
 
     private fun search() {
@@ -30,4 +40,12 @@ class SearchController(private val model: Model) {
 
         model.search(searchQuery, searchMode)
     }
+
+    fun onButtonRedoAction() {
+        model.redoSelection()
+    }
+
+    fun onButtonUndoAction() {
+        model.undoSelection()
+    }
 }

src/main/kotlin/com/marvinelsen/willow/ui/controllers/SearchResultsController.kt

@@ -2,7 +2,7 @@ package com.marvinelsen.willow.ui.controllers
 
 import com.marvinelsen.willow.Model
 import com.marvinelsen.willow.config.Config
-import com.marvinelsen.willow.ui.DictionaryEntryFx
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
 import com.marvinelsen.willow.ui.cells.DictionaryEntryCellFactory
 import javafx.application.HostServices
 import javafx.beans.binding.Bindings
@@ -29,7 +29,7 @@ class SearchResultsController(
     private lateinit var labelNoEntriesFound: Label
 
     @FXML
-    private lateinit var listViewSearchResults: ListView<DictionaryEntryFx>
+    private lateinit var listViewSearchResults: ListView<DictionaryEntry>
 
     @FXML
     @Suppress("UnusedPrivateMember")
@@ -45,7 +45,7 @@ class SearchResultsController(
             .visibleProperty()
             .bind(Bindings.and(Bindings.isEmpty(model.searchResults), Bindings.not(model.isSearching)))
 
-        listViewSearchResults.selectionModel.selectedItemProperty().addListener { _, _, newValue: DictionaryEntryFx? ->
+        listViewSearchResults.selectionModel.selectedItemProperty().addListener { _, _, newValue: DictionaryEntry? ->
             if (newValue == null) {
                 return@addListener
             }

src/main/kotlin/com/marvinelsen/willow/ui/undo/Command.kt

@@ -0,0 +1,7 @@
+package com.marvinelsen.willow.ui.undo
+
+interface Command {
+    fun execute()
+    fun undo()
+    fun redo() = execute()
+}

src/main/kotlin/com/marvinelsen/willow/ui/undo/UndoManager.kt

@@ -0,0 +1,39 @@
+package com.marvinelsen.willow.ui.undo
+
+import javafx.beans.property.SimpleBooleanProperty
+import java.util.Stack
+
+class UndoManager {
+    private val undoStack = Stack<Command>()
+    private val redoStack = Stack<Command>()
+
+    val canUndoProperty = SimpleBooleanProperty(false)
+    val canRedoProperty = SimpleBooleanProperty(false)
+
+    fun execute(command: Command) {
+        redoStack.clear()
+
+        undoStack.push(command).execute()
+
+        canUndoProperty.value = undoStack.size > 1
+        canRedoProperty.value = false
+    }
+
+    fun undo() {
+        if (undoStack.isEmpty()) return
+
+        redoStack.push(undoStack.pop()).undo()
+
+        canUndoProperty.value = undoStack.size > 1
+        canRedoProperty.value = true
+    }
+
+    fun redo() {
+        if (redoStack.isEmpty()) return
+
+        undoStack.push(redoStack.pop()).redo()
+
+        canUndoProperty.value = true
+        canRedoProperty.value = !redoStack.isEmpty()
+    }
+}

src/main/kotlin/com/marvinelsen/willow/ui/util/Concurrency.kt

@@ -1,7 +0,0 @@
-package com.marvinelsen.willow.ui.util
-
-import javafx.concurrent.Task
-
-fun <T> task(block: () -> T) = object : Task<T>() {
-    override fun call() = block()
-}

src/main/kotlin/com/marvinelsen/willow/ui/util/ContextMenuUtils.kt

@@ -1,7 +1,7 @@
 package com.marvinelsen.willow.ui.util
 
-import com.marvinelsen.willow.ui.DictionaryEntryFx
-import com.marvinelsen.willow.ui.SentenceFx
+import com.marvinelsen.willow.domain.entities.DictionaryEntry
+import com.marvinelsen.willow.domain.entities.Sentence
 import javafx.application.HostServices
 import javafx.event.EventHandler
 import javafx.scene.control.ContextMenu
@@ -11,24 +11,24 @@ import java.nio.charset.StandardCharsets
 import java.util.ResourceBundle
 
 fun createContextMenuForEntry(
-    entry: DictionaryEntryFx,
+    entry: DictionaryEntry,
     resourceBundle: ResourceBundle,
     hostServices: HostServices,
 ) = ContextMenu().apply {
     val menuItemCopyHeadword =
         MenuItem(resourceBundle.getString("menubar.edit.copy.headword")).apply {
-            onAction = EventHandler { ClipboardHelper.copyString(entry.traditionalProperty.value) }
+            onAction = EventHandler { ClipboardHelper.copyString(entry.traditional) }
         }
 
     val menuItemCopyPronunciation =
         MenuItem(resourceBundle.getString("menubar.edit.copy.pronunciation")).apply {
-            onAction = EventHandler { ClipboardHelper.copyString(entry.pinyinWithToneMarksProperty.value) }
+            onAction = EventHandler { ClipboardHelper.copyString(entry.pinyinWithToneMarks) }
         }
 
     val menuItemSearchOnWeb =
         MenuItem(resourceBundle.getString("menubar.edit.search-web")).apply {
             onAction = EventHandler {
-                val query = URLEncoder.encode(entry.traditionalProperty.value, StandardCharsets.UTF_8)
+                val query = URLEncoder.encode(entry.traditional, StandardCharsets.UTF_8)
                 hostServices.showDocument("https://duckduckgo.com/?q=$query")
             }
         }
@@ -37,19 +37,19 @@ fun createContextMenuForEntry(
 }
 
 fun createContextMenuForSentence(
-    sentence: SentenceFx,
+    sentence: Sentence,
     resourceBundle: ResourceBundle,
     hostServices: HostServices,
 ) = ContextMenu().apply {
     val menuItemCopySentence =
         MenuItem(resourceBundle.getString("menubar.edit.copy.sentence")).apply {
-            onAction = EventHandler { ClipboardHelper.copyString(sentence.traditionalProperty.value) }
+            onAction = EventHandler { ClipboardHelper.copyString(sentence.traditional) }
         }
 
     val menuItemSearchOnWeb =
         MenuItem(resourceBundle.getString("menubar.edit.search-web")).apply {
             onAction = EventHandler {
-                val query = URLEncoder.encode(sentence.traditionalProperty.value, StandardCharsets.UTF_8)
+                val query = URLEncoder.encode(sentence.traditional, StandardCharsets.UTF_8)
                 hostServices.showDocument("https://duckduckgo.com/?q=$query")
             }
         }

src/main/resources/fxml/search.fxml

@@ -5,9 +5,31 @@
 <?import javafx.scene.layout.FlowPane?>
 <?import javafx.scene.layout.HBox?>
 <?import javafx.scene.layout.VBox?>
+<?import org.kordamp.ikonli.javafx.FontIcon?>
 <VBox xmlns="http://javafx.com/javafx/23" xmlns:fx="http://javafx.com/fxml/1"
       fx:controller="com.marvinelsen.willow.ui.controllers.SearchController" spacing="8">
-    <TextField fx:id="textFieldSearch" promptText="%search.prompt" HBox.hgrow="ALWAYS"/>
+
+    <HBox alignment="CENTER_LEFT" prefHeight="0.0" spacing="6.0" VBox.vgrow="NEVER">
+        <Button fx:id="buttonUndo" contentDisplay="GRAPHIC_ONLY" disable="true" graphicTextGap="0.0"
+                mnemonicParsing="false" onAction="#onButtonUndoAction">
+            <graphic>
+                <FontIcon iconLiteral="mdal-arrow_back" iconSize="16"/>
+            </graphic>
+            <tooltip>
+                <Tooltip text="Go back one search (Alt+Left Arrow)"/>
+            </tooltip>
+        </Button>
+        <Button fx:id="buttonRedo" contentDisplay="GRAPHIC_ONLY" disable="true" graphicTextGap="0.0"
+                mnemonicParsing="false" onAction="#onButtonRedoAction">
+            <graphic>
+                <FontIcon iconLiteral="mdal-arrow_forward" iconSize="16"/>
+            </graphic>
+            <tooltip>
+                <Tooltip text="Go forward one search (Alt+Right Arrow)"/>
+            </tooltip>
+        </Button>
+        <TextField fx:id="textFieldSearch" promptText="%search.prompt" HBox.hgrow="ALWAYS"/>
+    </HBox>
     <FlowPane hgap="8.0" vgap="8.0">
         <Label text="%search.mode"/>
         <RadioButton mnemonicParsing="false" selected="true" text="%search.mode.simplified">