Add KeyEvents for search results

Author: snappdevelopment

composeApp/src/desktopMain/kotlin/com/sebastianneubauer/jsontreeviewer/App.kt

@@ -33,6 +33,7 @@ import androidx.compose.material.icons.filled.KeyboardArrowUp
 import androidx.compose.material.icons.outlined.Info
 import androidx.compose.material.icons.outlined.KeyboardArrowDown
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -106,7 +107,7 @@ private fun AppUi(
                 is Contract.State.InitialLoading -> InitialLoading(isHovering = isHovering)
                 is Contract.State.Loading -> Loading()
                 is Contract.State.Error -> Error(error = state.error, isHovering = isHovering)
-                is Contract.State.Content -> Content(json = state.json, stats = state.stats, onJsonParsingError = onJsonParsingError)
+                is Contract.State.Content -> Content(json = state.json, searchDirection = state.searchDirection, stats = state.stats, onJsonParsingError = onJsonParsingError)
             }
         }
     }
@@ -115,6 +116,7 @@ private fun AppUi(
 @Composable
 private fun Content(
     json: String,
+    searchDirection: Contract.SearchDirection?,
     stats: Contract.Stats,
     onJsonParsingError: (Throwable) -> Unit
 ) {
@@ -123,6 +125,14 @@ private fun Content(
     val searchQuery by remember(searchState.query) { mutableStateOf(searchState.query.orEmpty()) }
     var showSidebar by remember { mutableStateOf(false) }
 
+    LaunchedEffect(searchDirection) {
+        when(searchDirection) {
+            is Contract.SearchDirection.Next -> searchState.selectNext()
+            is Contract.SearchDirection.Previous -> searchState.selectPrevious()
+            null -> Unit
+        }
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()

composeApp/src/desktopMain/kotlin/com/sebastianneubauer/jsontreeviewer/State.kt

@@ -7,7 +7,7 @@ object Contract {
         data object InitialLoading: State
         data object Loading: State
         data class Error(val error: ErrorType): State
-        data class Content(val json: String, val stats: Stats): State
+        data class Content(val json: String, val stats: Stats, val searchDirection: SearchDirection?): State
     }
 
     sealed class ErrorType {
@@ -17,6 +17,13 @@ object Contract {
         data class JsonParserError(val message: String): ErrorType()
     }
 
+    sealed interface SearchDirection {
+        val increment: Int
+
+        data class Next(override val increment: Int): SearchDirection
+        data class Previous(override val increment: Int): SearchDirection
+    }
+
     data class Stats(
         val filePath: String,
         val fileName: String,

composeApp/src/desktopMain/kotlin/com/sebastianneubauer/jsontreeviewer/ViewModel.kt

@@ -43,6 +43,7 @@ class ViewModel(
 
                             State.Content(
                                 json = json,
+                                searchDirection = null,
                                 stats = Contract.Stats(
                                     filePath = validFile.path,
                                     fileName = validFile.name,
@@ -63,34 +64,66 @@ class ViewModel(
 
     fun onKeyEvent(event: KeyEvent): Boolean {
         return if ((event.isCtrlPressed || event.isMetaPressed) && event.key == Key.V) {
-            val clipboardString = try {
-                Toolkit.getDefaultToolkit()
-                    .systemClipboard
-                    .getData(DataFlavor.stringFlavor) as String
-            } catch (e: Exception) {
-                null
-            }
-
-            viewModelState.value = if(clipboardString != null) {
-                State.Content(
-                    json = clipboardString,
-                    stats = Contract.Stats(
-                        filePath = "from clipboard",
-                        fileName = "n/a",
-                        fileSize = "n/a",
-                        fileReadTime = "n/a",
-                        fileLines = clipboardString.lines().count().toString()
-                    )
-                )
-            } else {
-                State.Error(error = Contract.ErrorType.CopyPasteError)
-            }
+            viewModelState.value = getStateFromClipboardData()
             true
+        } else if(event.key == Key.DirectionDown || event.key == Key.Enter) {
+            val newState = getStateFromSearchDirectionEvent(isDownEvent = true)
+            viewModelState.value = newState
+            newState is State.Content
+        } else if(event.key == Key.DirectionUp) {
+            val newState = getStateFromSearchDirectionEvent(isDownEvent = false)
+            viewModelState.value = newState
+            newState is State.Content
         } else {
             false
         }
     }
 
+    private fun getStateFromClipboardData(): State {
+        val clipboardString = try {
+            Toolkit.getDefaultToolkit()
+                .systemClipboard
+                .getData(DataFlavor.stringFlavor) as String
+        } catch (e: Exception) {
+            null
+        }
+
+        return if(clipboardString != null) {
+            State.Content(
+                json = clipboardString,
+                searchDirection = null,
+                stats = Contract.Stats(
+                    filePath = "from clipboard",
+                    fileName = "n/a",
+                    fileSize = "n/a",
+                    fileReadTime = "n/a",
+                    fileLines = clipboardString.lines().count().toString()
+                )
+            )
+        } else {
+            State.Error(error = Contract.ErrorType.CopyPasteError)
+        }
+    }
+
+    private fun getStateFromSearchDirectionEvent(isDownEvent: Boolean): State {
+        val currentState = viewModelState.value
+        return if(currentState is State.Content) {
+            val currentSearchDirection = currentState.searchDirection
+            val newSearchDirection = if(isDownEvent) {
+                when(currentSearchDirection) {
+                    is Contract.SearchDirection.Next -> currentSearchDirection.copy(increment = currentSearchDirection.increment + 1)
+                    else -> Contract.SearchDirection.Next(increment = 0)
+                }
+            } else {
+                when(currentSearchDirection) {
+                    is Contract.SearchDirection.Previous -> currentSearchDirection.copy(increment = currentSearchDirection.increment + 1)
+                    else -> Contract.SearchDirection.Previous(increment = 0)
+                }
+            }
+            currentState.copy(searchDirection = newSearchDirection)
+        } else currentState
+    }
+
     fun showJsonParsingError(throwable: Throwable) {
         viewModelState.value = State.Error(
             error = Contract.ErrorType.JsonParserError(message = throwable.localizedMessage)

composeApp/src/desktopTest/kotlin/com/sebastianneubauer/jsontreeviewer/ViewModelTest.kt

@@ -44,6 +44,7 @@ class ViewModelTest {
         assertEquals(
             expected = State.Content(
                 json = json,
+                searchDirection = null,
                 stats = Contract.Stats(
                     filePath = file.path,
                     fileName = file.name,