Refactor icons

ktx/src/main/java/de/mm20/launcher2/ktx/Drawable.kt

@@ -1,6 +1,8 @@
 package de.mm20.launcher2.ktx
 
 import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.ColorFilter
 import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import androidx.annotation.Px
@@ -13,4 +15,11 @@ fun Drawable.toBitmapOrNull(
 ): Bitmap? {
     if (this is BitmapDrawable && bitmap == null) return null
     return toBitmap(width, height, config)
+}
+
+fun Drawable.drawWithColorFilter(canvas: Canvas, colorFilter: ColorFilter?) {
+    val cf = this.colorFilter
+    this.colorFilter = colorFilter
+    this.draw(canvas)
+    this.colorFilter = cf
 }

ktx/src/main/java/de/mm20/launcher2/ktx/LayerDrawable.kt

@@ -0,0 +1,12 @@
+package de.mm20.launcher2.ktx
+
+import android.graphics.drawable.Drawable
+import android.graphics.drawable.LayerDrawable
+
+fun LayerDrawable.getDrawableOrNull(index: Int): Drawable? {
+    return try {
+        this.getDrawable(index)
+    } catch (e: IndexOutOfBoundsException) {
+        return null
+    }
+}