Share Insets instances between views that have the same background (Drawable)

Change-Id: I47d93ccca6f553b678d25966d10d7a0a97cfa5ea

core/java/android/view/View.java

@@ -13846,13 +13846,7 @@ public class View implements Drawable.Callback, Drawable.Callback2, KeyEvent.Cal
      */
     public Insets getLayoutInsets() {
         if (mLayoutInsets == null) {
-            if (mBackground == null) {
-                mLayoutInsets = Insets.NONE;
-            } else {
-                Rect insetRect = new Rect();
-                boolean hasInsets = mBackground.getLayoutInsets(insetRect);
-                mLayoutInsets = hasInsets ? Insets.of(insetRect) : Insets.NONE;
-            }
+            mLayoutInsets = (mBackground == null) ? Insets.NONE : mBackground.getLayoutInsets();
         }
         return mLayoutInsets;
     }

graphics/java/android/graphics/Insets.java

@@ -67,7 +67,7 @@ public class Insets {
      * @return an Insets instance with the appropriate values
      */
     public static Insets of(Rect r) {
-        return of(r.left, r.top, r.right, r.bottom);
+        return (r == null) ? NONE : of(r.left, r.top, r.right, r.bottom);
     }
 
     /**

graphics/java/android/graphics/drawable/Drawable.java

@@ -16,6 +16,7 @@
 
 package android.graphics.drawable;
 
+import android.graphics.Insets;
 import org.xmlpull.v1.XmlPullParser;
 import org.xmlpull.v1.XmlPullParserException;
 
@@ -706,16 +707,12 @@ public abstract class Drawable {
 
     /**
      * Return in insets the layout insets suggested by this Drawable for use with alignment
-     * operations during layout. Positive values move toward the
-     * center of the Drawable. Returns true if this drawable
-     * actually has a layout insets, else false. When false is returned, the padding
-     * is always set to 0.
+     * operations during layout.
      *
      * @hide
      */
-    public boolean getLayoutInsets(Rect insets) {
-        insets.set(0, 0, 0, 0);
-        return false;
+    public Insets getLayoutInsets() {
+        return Insets.NONE;
     }
 
     /**

graphics/java/android/graphics/drawable/DrawableContainer.java

@@ -19,6 +19,7 @@ package android.graphics.drawable;
 import android.content.res.Resources;
 import android.graphics.Canvas;
 import android.graphics.ColorFilter;
+import android.graphics.Insets;
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.os.SystemClock;
@@ -94,12 +95,8 @@ public class DrawableContainer extends Drawable implements Drawable.Callback {
      * @hide
      */
     @Override
-    public boolean getLayoutInsets(Rect insets) {
-        if (mCurrDrawable != null) {
-            return mCurrDrawable.getLayoutInsets(insets);
-        } else {
-            return super.getLayoutInsets(insets);
-        }
+    public Insets getLayoutInsets() {
+        return (mCurrDrawable == null) ? Insets.NONE : mCurrDrawable.getLayoutInsets();
     }
 
     @Override

graphics/java/android/graphics/drawable/NinePatchDrawable.java

@@ -22,6 +22,7 @@ import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Canvas;
 import android.graphics.ColorFilter;
+import android.graphics.Insets;
 import android.graphics.NinePatch;
 import android.graphics.Paint;
 import android.graphics.PixelFormat;
@@ -224,13 +225,8 @@ public class NinePatchDrawable extends Drawable {
      * @hide
      */
     @Override
-    public boolean getLayoutInsets(Rect insets) {
-        Rect layoutInsets = mNinePatchState.mLayoutInsets;
-        if (layoutInsets == null) {
-            return super.getLayoutInsets(insets);
-        }
-        insets.set(layoutInsets);
-        return true;
+    public Insets getLayoutInsets() {
+        return mNinePatchState.mLayoutInsets;
     }
 
     @Override
@@ -390,7 +386,7 @@ public class NinePatchDrawable extends Drawable {
     private final static class NinePatchState extends ConstantState {
         final NinePatch mNinePatch;
         final Rect mPadding;
-        final Rect mLayoutInsets;
+        final Insets mLayoutInsets;
         final boolean mDither;
         int mChangingConfigurations;
         int mTargetDensity = DisplayMetrics.DENSITY_DEFAULT;
@@ -406,7 +402,7 @@ public class NinePatchDrawable extends Drawable {
         NinePatchState(NinePatch ninePatch, Rect rect, Rect layoutInsets, boolean dither) {
             mNinePatch = ninePatch;
             mPadding = rect;
-            mLayoutInsets = layoutInsets;
+            mLayoutInsets = Insets.of(layoutInsets);
             mDither = dither;
         }
 

tests/GridLayoutTest/src/com/android/test/layout/LayoutInsetsTest.java

@@ -33,6 +33,13 @@ public class LayoutInsetsTest extends Activity {
             c.setText("Email setup");
             p.addView(c);
         }
+        {
+            Button c = new Button(context);
+            c.setBackgroundResource(R.drawable.btn_default);
+            c.setText("Test");
+            p.addView(c);
+        }
+
         {
             Button c = new Button(context);
             c.setBackgroundResource(R.drawable.btn_default);