From b70b98feb62d522866d782f8adcd1eb794137d9b Mon Sep 17 00:00:00 2001
From: 2ndbeam <2ndbeam@disroot.org>
Date: Tue, 30 Sep 2025 14:44:28 +0300
Subject: [PATCH] fixed no data crashes

---
 app/src/main/java/com/mirenkov/ktheightmap/KhmParser.kt      | 4 +++-
 app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt      | 3 ---
 app/src/main/java/com/mirenkov/ktheightmap/TileRepository.kt | 2 +-
 app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt  | 2 +-
 4 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/app/src/main/java/com/mirenkov/ktheightmap/KhmParser.kt b/app/src/main/java/com/mirenkov/ktheightmap/KhmParser.kt
index eae616e..6081679 100644
--- a/app/src/main/java/com/mirenkov/ktheightmap/KhmParser.kt
+++ b/app/src/main/java/com/mirenkov/ktheightmap/KhmParser.kt
@@ -63,6 +63,8 @@ class KhmParser {
         }
 
         fun getHeight(lon: Float, lat: Float, ctx: Context): UShort {
+            if (!ctx.getFileStreamPath(HEIGHT_FILE).exists())
+                return 0u.toUShort()
             val dis = DataInputStream(ctx.openFileInput(HEIGHT_FILE))
             dis.use {
                 val header = readHeader(dis)
@@ -80,7 +82,7 @@ class KhmParser {
 
         @OptIn(ExperimentalUnsignedTypes::class)
         fun getHeightsMul(ctx: Context, coords: Array<Pair<Float, Float>>): Pair<UShortArray, Array<Pair<Float, Float>>> {
-            if (coords.isEmpty()) return Pair(ushortArrayOf(), coords)
+            if (coords.isEmpty() || !ctx.getFileStreamPath(HEIGHT_FILE).exists()) return Pair(ushortArrayOf(), coords)
             val dis = DataInputStream(ctx.openFileInput(HEIGHT_FILE))
             dis.use {
                 val header = readHeader(dis)
diff --git a/app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt b/app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt
index f8494bf..22d8f9c 100644
--- a/app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt
+++ b/app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt
@@ -26,11 +26,8 @@ import androidx.compose.ui.text.drawText
 import androidx.compose.ui.text.rememberTextMeasurer
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.withStyle
-import kotlin.math.abs
 import kotlin.math.absoluteValue
 import kotlin.math.floor
-import kotlin.math.max
-import kotlin.math.min
 import kotlin.math.pow
 import kotlin.math.sqrt
 
diff --git a/app/src/main/java/com/mirenkov/ktheightmap/TileRepository.kt b/app/src/main/java/com/mirenkov/ktheightmap/TileRepository.kt
index a5eaf79..028d931 100644
--- a/app/src/main/java/com/mirenkov/ktheightmap/TileRepository.kt
+++ b/app/src/main/java/com/mirenkov/ktheightmap/TileRepository.kt
@@ -23,6 +23,6 @@ class TileRepository(private val tileDao: TileDao) {
     }
 
     fun getMaxLevel(): Int {
-        return coroutineScope.future(Dispatchers.IO){ tileDao.maxLevel() }.join() ?: 1
+        return coroutineScope.future(Dispatchers.IO){ tileDao.maxLevel() }.join() ?: 2
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt b/app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt
index 971e59b..b1dcaf5 100644
--- a/app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt
+++ b/app/src/main/java/com/mirenkov/ktheightmap/TileViewModel.kt
@@ -19,7 +19,7 @@ class TileViewModel(application: Application): ViewModel() {
     val mapOffsetX = mutableFloatStateOf(-646.65625F)
     val mapOffsetY = mutableFloatStateOf(-1157.2814F)
     val scale = mutableFloatStateOf(2F)
-    var maxLevel = mutableIntStateOf(1)
+    var maxLevel = mutableIntStateOf(2)
 
     var halvedOffsetX: Float? = null
     var halvedOffsetY: Float? = null