1 files changed, 77 insertions, 0 deletions
diff --git a/setupwizardlib/src/main/java/com/android/setupwizardlib/util/DrawableLayoutDirectionHelper.java b/setupwizardlib/src/main/java/com/android/setupwizardlib/util/DrawableLayoutDirectionHelper.java
new file mode 100644
index 0000000..bf4c0c2
--- /dev/null
+++ b/setupwizardlib/src/main/java/com/android/setupwizardlib/util/DrawableLayoutDirectionHelper.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.setupwizardlib.util;
+
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.graphics.drawable.InsetDrawable;
+import android.os.Build;
+import android.view.View;
+
+/**
+ * Provides convenience methods to handle drawable layout directions in different SDK versions.
+ */
+public class DrawableLayoutDirectionHelper {
+
+    /**
+     * Creates an {@link android.graphics.drawable.InsetDrawable} according to the layout direction
+     * of {@code view}.
+     */
+    public static InsetDrawable createRelativeInsetDrawable(Drawable drawable,
+            int insetStart, int insetTop, int insetEnd, int insetBottom, View view) {
+        boolean isRtl = Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1
+                && view.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
+        return createRelativeInsetDrawable(drawable, insetStart, insetTop, insetEnd, insetBottom,
+                isRtl);
+    }
+
+    /**
+     * Creates an {@link android.graphics.drawable.InsetDrawable} according to the layout direction
+     * of {@code context}.
+     */
+    public static InsetDrawable createRelativeInsetDrawable(Drawable drawable,
+            int insetStart, int insetTop, int insetEnd, int insetBottom, Context context) {
+        boolean isRtl = false;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            final int layoutDirection =
+                    context.getResources().getConfiguration().getLayoutDirection();
+            isRtl = layoutDirection == View.LAYOUT_DIRECTION_RTL;
+        }
+        return createRelativeInsetDrawable(drawable, insetStart, insetTop, insetEnd, insetBottom,
+                isRtl);
+    }
+
+    /**
+     * Creates an {@link android.graphics.drawable.InsetDrawable} according to
+     * {@code layoutDirection}.
+     */
+    public static InsetDrawable createRelativeInsetDrawable(Drawable drawable,
+            int insetStart, int insetTop, int insetEnd, int insetBottom, int layoutDirection) {
+        //noinspection AndroidLintInlinedApi
+        return createRelativeInsetDrawable(drawable, insetStart, insetTop, insetEnd, insetBottom,
+                layoutDirection == View.LAYOUT_DIRECTION_RTL);
+    }
+
+    private static InsetDrawable createRelativeInsetDrawable(Drawable drawable,
+            int insetStart, int insetTop, int insetEnd, int insetBottom, boolean isRtl) {
+        if (isRtl) {
+            return new InsetDrawable(drawable, insetEnd, insetTop, insetStart, insetBottom);
+        } else {
+            return new InsetDrawable(drawable, insetStart, insetTop, insetEnd, insetBottom);
+        }
+    }
+}