fix size of overlay drawable

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/androidTest/java/com/owncloud/android/utils/DrawableUtilTests.kt

@@ -12,18 +12,15 @@ import android.graphics.Bitmap
 import android.graphics.drawable.BitmapDrawable
 import androidx.test.platform.app.InstrumentationRegistry
 import org.junit.After
-import org.junit.Assert.fail
 import org.junit.Before
 import org.junit.Test
 
 class DrawableUtilTests {
 
-    private var sut: DrawableUtil? = null
     private var context: Context? = null
 
     @Before
     fun setUp() {
-        sut = DrawableUtil()
         context = InstrumentationRegistry.getInstrumentation().context
     }
 
@@ -32,18 +29,13 @@ class DrawableUtilTests {
         val bitmap: Bitmap = Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888)
         val drawable = BitmapDrawable(context?.resources, bitmap)
 
-        val layerDrawable = sut?.addDrawableAsOverlay(drawable, drawable)
+        val layerDrawable = DrawableUtil.addDrawableAsOverlay(drawable, drawable)
 
-        if (layerDrawable == null) {
-            fail("Layer drawable expected to be not null")
-        }
-
-        assert(layerDrawable?.numberOfLayers == 2)
+        assert(layerDrawable.numberOfLayers == 2)
     }
 
     @After
     fun destroy() {
-        sut = null
         context = null
     }
 }

app/src/main/java/com/owncloud/android/utils/DrawableUtil.kt

@@ -7,12 +7,12 @@
  */
 package com.owncloud.android.utils
 
-import android.graphics.Rect
 import android.graphics.drawable.Drawable
+import android.graphics.drawable.InsetDrawable
 import android.graphics.drawable.LayerDrawable
 import androidx.core.graphics.drawable.DrawableCompat
 
-class DrawableUtil {
+object DrawableUtil {
 
     fun changeColor(source: Drawable, color: Int): Drawable {
         val drawable = DrawableCompat.wrap(source)
@@ -21,13 +21,16 @@ class DrawableUtil {
     }
 
     fun addDrawableAsOverlay(backgroundDrawable: Drawable, overlayDrawable: Drawable): LayerDrawable {
-        val overlayBounds = Rect()
-        val overlayIconSize = backgroundDrawable.intrinsicWidth / 2
-        val topMargin = overlayIconSize.div(2)
-        overlayBounds.set(overlayIconSize, overlayIconSize + topMargin, overlayIconSize, overlayIconSize)
+        val overlaySizeFraction = 0.1f
+        val baseWidth = backgroundDrawable.intrinsicWidth
+        val baseHeight = backgroundDrawable.intrinsicHeight
+        val overlayWidth = (baseWidth * overlaySizeFraction).toInt()
+        val overlayHeight = (baseHeight * overlaySizeFraction).toInt()
 
-        val layerDrawable = LayerDrawable(arrayOf(backgroundDrawable, overlayDrawable))
-        layerDrawable.setLayerInset(1, overlayBounds.left, overlayBounds.top, overlayBounds.right, overlayBounds.bottom)
-        return layerDrawable
+        val insetLeft = (baseWidth - overlayWidth) / 2
+        val insetTop = (baseHeight - overlayHeight) / 2
+
+        val insetOverlay = InsetDrawable(overlayDrawable, insetLeft, overlayHeight + insetTop, insetLeft, insetTop)
+        return LayerDrawable(arrayOf(backgroundDrawable, insetOverlay))
     }
 }

app/src/main/java/com/owncloud/android/utils/MimeTypeUtil.java

@@ -175,16 +175,14 @@ public final class MimeTypeUtil {
             return folderLayerDrawable;
         }
 
-        DrawableUtil drawableUtil = new DrawableUtil();
-
         Drawable overlayDrawable = ContextCompat.getDrawable(context, overlayIconId);
         assert(overlayDrawable != null);
 
         if (isDarkModeActive) {
-            overlayDrawable = drawableUtil.changeColor(overlayDrawable, R.color.dark);
+            overlayDrawable = DrawableUtil.INSTANCE.changeColor(overlayDrawable, R.color.dark);
         }
 
-        return drawableUtil.addDrawableAsOverlay(folderDrawable, overlayDrawable);
+        return DrawableUtil.INSTANCE.addDrawableAsOverlay(folderDrawable, overlayDrawable);
     }
 
     /**