fix: preserve existing margins when adding new insets

app/src/main/java/fr/free/nrw/commons/locationpicker/LocationPickerActivity.kt

@@ -48,6 +48,7 @@ import fr.free.nrw.commons.upload.mediaDetails.UploadMediaDetailFragment.Compani
 import fr.free.nrw.commons.upload.mediaDetails.UploadMediaDetailFragment.Companion.LAST_ZOOM
 import fr.free.nrw.commons.utils.DialogUtil
 import fr.free.nrw.commons.utils.MapUtils.ZOOM_LEVEL
+import fr.free.nrw.commons.utils.applyEdgeToEdgeBottomInsets
 import fr.free.nrw.commons.utils.handleGeoCoordinates
 import io.reactivex.android.schedulers.AndroidSchedulers
 import io.reactivex.schedulers.Schedulers
@@ -474,6 +475,7 @@ class LocationPickerActivity : BaseActivity(), LocationPermissionCallback {
      */
     private fun addPlaceSelectedButton() {
         placeSelectedButton = findViewById(R.id.location_chosen_button)
+        applyEdgeToEdgeBottomInsets(placeSelectedButton)
         placeSelectedButton.setOnClickListener { placeSelected() }
     }
 

app/src/main/java/fr/free/nrw/commons/utils/EdgeToEdgeUtils.kt

@@ -1,21 +1,64 @@
 package fr.free.nrw.commons.utils
 
-import androidx.core.graphics.Insets
 import android.view.View
 import android.view.ViewGroup.MarginLayoutParams
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.marginBottom
+import androidx.core.view.marginLeft
+import androidx.core.view.marginRight
+import androidx.core.view.marginTop
 import androidx.core.view.updateLayoutParams
+import fr.free.nrw.commons.R
 
 fun View.applyEdgeToEdgeInsets(
     typeMask: Int = WindowInsetsCompat.Type.systemBars(),
-    block: MarginLayoutParams.(Insets) -> Unit
+    block: MarginLayoutParams.(InsetsAccumulator) -> Unit
 ) {
-    ViewCompat.setOnApplyWindowInsetsListener(this) { v, windowInsets ->
+    ViewCompat.setOnApplyWindowInsetsListener(this) { view, windowInsets ->
         val insets = windowInsets.getInsets(typeMask)
 
-        v.updateLayoutParams<MarginLayoutParams> {
-            apply { block(insets) }
+        val initialTop = if (view.getTag(R.id.initial_margin_top) != null) {
+            view.getTag(R.id.initial_margin_top) as Int
+        } else {
+            view.setTag(R.id.initial_margin_top, view.marginTop)
+            view.marginTop
+        }
+
+        val initialBottom = if (view.getTag(R.id.initial_margin_bottom) != null) {
+            view.getTag(R.id.initial_margin_bottom) as Int
+        } else {
+            view.setTag(R.id.initial_margin_bottom, view.marginBottom)
+            view.marginBottom
+        }
+
+        val initialLeft = if (view.getTag(R.id.initial_margin_left) != null) {
+            view.getTag(R.id.initial_margin_left) as Int
+        } else {
+            view.setTag(R.id.initial_margin_left, view.marginLeft)
+            view.marginLeft
+        }
+
+        val initialRight = if (view.getTag(R.id.initial_margin_right) != null) {
+            view.getTag(R.id.initial_margin_right) as Int
+        } else {
+            view.setTag(R.id.initial_margin_right, view.marginRight)
+            view.marginRight
+        }
+
+        val accumulator = InsetsAccumulator(
+            initialTop,
+            insets.top,
+            initialBottom,
+            insets.bottom,
+            initialLeft,
+            insets.left,
+            initialRight,
+            insets.right
+        )
+
+        view.updateLayoutParams<MarginLayoutParams> {
+            apply { block(accumulator) }
         }
 
         WindowInsetsCompat.CONSUMED
@@ -40,3 +83,19 @@ fun applyEdgeToEdgeBottomInsets(view: View) = view.applyEdgeToEdgeInsets { inset
     rightMargin = insets.right
     bottomMargin = insets.bottom
 }
+
+data class InsetsAccumulator(
+    private val initialTop: Int,
+    private val insetTop: Int,
+    private val initialBottom: Int,
+    private val insetBottom: Int,
+    private val initialLeft: Int,
+    private val insetLeft: Int,
+    private val initialRight: Int,
+    private val insetRight: Int
+) {
+    val top = initialTop + insetTop
+    val bottom = initialBottom + insetBottom
+    val left = initialLeft + insetLeft
+    val right = initialRight + insetRight
+}

app/src/main/res/values/ids.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <item name="initial_margin_top" type="id" />
+  <item name="initial_margin_bottom" type="id" />
+  <item name="initial_margin_left" type="id" />
+  <item name="initial_margin_right" type="id" />
+</resources>