fix: reset search state on page change (#216)

Refs: https://github.com/FossifyOrg/Notes/issues/190

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Fixed
+- Fixed crash in search ([#190])
 
 ## [1.4.1] - 2025-09-01
 ### Changed
@@ -80,6 +82,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#157]: https://github.com/FossifyOrg/Notes/issues/157
 [#164]: https://github.com/FossifyOrg/Notes/issues/164
 [#178]: https://github.com/FossifyOrg/Notes/issues/178
+[#190]: https://github.com/FossifyOrg/Notes/issues/190
 [#201]: https://github.com/FossifyOrg/Notes/issues/201
 
 [Unreleased]: https://github.com/FossifyOrg/Notes/compare/1.4.1...HEAD

app/src/main/kotlin/org/fossify/notes/activities/MainActivity.kt

@@ -107,6 +107,7 @@ import org.fossify.notes.extensions.config
 import org.fossify.notes.extensions.getPercentageFontSize
 import org.fossify.notes.extensions.notesDB
 import org.fossify.notes.extensions.parseChecklistItems
+import org.fossify.notes.extensions.safeSetSelection
 import org.fossify.notes.extensions.updateWidgets
 import org.fossify.notes.extensions.widgetsDB
 import org.fossify.notes.fragments.TextFragment
@@ -608,6 +609,9 @@ class MainActivity : SimpleActivity() {
         }
 
         binding.viewPager.onPageChangeListener {
+            searchIndex = 0
+            searchMatches = emptyList()
+
             currentTextFragment?.removeTextWatcher()
             currentNotesView()?.let { noteView ->
                 noteView.text!!.clearBackgroundSpans()
@@ -641,7 +645,7 @@ class MainActivity : SimpleActivity() {
 
             if (searchMatches.isNotEmpty()) {
                 noteView.requestFocus()
-                noteView.setSelection(searchMatches.getOrNull(searchIndex) ?: 0)
+                noteView.safeSetSelection(searchMatches.getOrNull(searchIndex) ?: 0)
             }
 
             searchQueryET.postDelayed({
@@ -681,7 +685,7 @@ class MainActivity : SimpleActivity() {
     private fun selectSearchMatch(editText: MyEditText) {
         if (searchMatches.isNotEmpty()) {
             editText.requestFocus()
-            editText.setSelection(searchMatches.getOrNull(searchIndex) ?: 0)
+            editText.safeSetSelection(searchMatches.getOrNull(searchIndex) ?: 0)
         } else {
             hideKeyboard()
         }
@@ -694,7 +698,7 @@ class MainActivity : SimpleActivity() {
 
         currentNotesView()?.let { noteView ->
             noteView.requestFocus()
-            noteView.setSelection(0)
+            noteView.safeSetSelection(0)
         }
 
         searchQueryET.postDelayed({

app/src/main/kotlin/org/fossify/notes/extensions/EditText.kt

@@ -16,3 +16,9 @@ fun MyEditText.enforcePlainText() {
     }
     filters = (filters ?: emptyArray()) + stripSpans
 }
+
+fun MyEditText.safeSetSelection(position: Int) {
+    val length = text?.length ?: 0
+    setSelection(position.coerceIn(0, length))
+}
+