Image editor: added flip vertically

app/src/main/java/eu/faircode/email/FragmentDialogEditImage.java

@@ -50,7 +50,8 @@ public class FragmentDialogEditImage extends FragmentDialogBase {
         Context context = getContext();
         View dview = LayoutInflater.from(context).inflate(R.layout.dialog_edit_image, null);
         ImageButton ibRotate = dview.findViewById(R.id.ibRotate);
-        ImageButton ibFlip = dview.findViewById(R.id.ibFlip);
+        ImageButton ibFlipHorizontally = dview.findViewById(R.id.ibFlipHorizontally);
+        ImageButton ibFlipVertically = dview.findViewById(R.id.ibFlipVertically);
         ImageButton ibCancel = dview.findViewById(R.id.ibCancel);
         ImageButton ibSave = dview.findViewById(R.id.ibSave);
         CropImageView civ = dview.findViewById(R.id.civ);
@@ -67,13 +68,20 @@ public class FragmentDialogEditImage extends FragmentDialogBase {
             }
         });
 
-        ibFlip.setOnClickListener(new View.OnClickListener() {
+        ibFlipHorizontally.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
                 civ.flipImageHorizontally();
             }
         });
 
+        ibFlipVertically.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                civ.flipImageVertically();
+            }
+        });
+
         ibCancel.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {

app/src/main/res/drawable/twotone_swap_horiz_24.xml

@@ -6,5 +6,5 @@
     android:tint="?attr/colorControlNormal">
   <path
       android:fillColor="@android:color/white"
-      android:pathData="M19,7h2v2h-2zM19,21c1.1,0 2,-0.9 2,-2h-2v2zM19,15h2v2h-2zM19,11h2v2h-2zM9,5L9,3L5,3c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h4v-2L5,19L5,5h4zM19,3v2h2c0,-1.1 -0.9,-2 -2,-2zM11,1h2v22h-2zM15,3h2v2h-2zM15,19h2v2h-2z"/>
+      android:pathData="M6.99,11L3,15l3.99,4v-3H14v-2H6.99v-3zM21,9l-3.99,-4v3H10v2h7.01v3L21,9z"/>
 </vector>

app/src/main/res/drawable/twotone_swap_vert_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M16,17.01V10h-2v7.01h-3L15,21l4,-3.99h-3zM9,3L5,6.99h3V14h2V6.99h3L9,3z"/>
+</vector>

app/src/main/res/layout/dialog_edit_image.xml

@@ -29,31 +29,45 @@
         app:tint="?attr/colorAccent" />
 
     <ImageButton
-        android:id="@+id/ibFlip"
+        android:id="@+id/ibFlipHorizontally"
         android:layout_width="36dp"
         android:layout_height="36dp"
-        android:layout_marginStart="24dp"
+        android:layout_marginStart="12dp"
         android:layout_marginTop="12dp"
         android:background="?android:attr/selectableItemBackgroundBorderless"
         android:scaleType="fitCenter"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintStart_toEndOf="@id/ibRotate"
         app:layout_constraintTop_toBottomOf="@id/civ"
-        app:srcCompat="@drawable/twotone_flip_24"
+        app:srcCompat="@drawable/twotone_swap_horiz_24"
+        app:tint="?attr/colorAccent" />
+
+    <ImageButton
+        android:id="@+id/ibFlipVertically"
+        android:layout_width="36dp"
+        android:layout_height="36dp"
+        android:layout_marginStart="12dp"
+        android:layout_marginTop="12dp"
+        android:background="?android:attr/selectableItemBackgroundBorderless"
+        android:scaleType="fitCenter"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toEndOf="@id/ibFlipHorizontally"
+        app:layout_constraintTop_toBottomOf="@id/civ"
+        app:srcCompat="@drawable/twotone_swap_vert_24"
         app:tint="?attr/colorAccent" />
 
     <ImageButton
         android:id="@+id/ibCancel"
         android:layout_width="36dp"
         android:layout_height="36dp"
-        android:layout_marginStart="24dp"
+        android:layout_marginStart="12dp"
         android:layout_marginTop="12dp"
         android:background="?android:attr/selectableItemBackgroundBorderless"
         android:contentDescription="@android:string/cancel"
         android:scaleType="fitCenter"
         android:tooltipText="@android:string/cancel"
         app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintStart_toEndOf="@id/ibFlip"
+        app:layout_constraintStart_toEndOf="@id/ibFlipVertically"
         app:layout_constraintTop_toBottomOf="@id/civ"
         app:srcCompat="@drawable/twotone_close_24" />