Move DimenPxIntSupplier to shared utils

Flag: EXEMPT refactor
Test: atest LetterboxConfigurationTest
Bug: 280496681
Change-Id: I24f01d1d559d7d62cd470d2c7e2c81e4ed8f242d

2 files changed, 55 insertions, 30 deletions

diff --git a/services/core/java/com/android/server/wm/LetterboxConfiguration.java b/services/core/java/com/android/server/wm/LetterboxConfiguration.java
index b5af8065726d..0161ae5b5473 100644
--- a/services/core/java/com/android/server/wm/LetterboxConfiguration.java
+++ b/services/core/java/com/android/server/wm/LetterboxConfiguration.java
@@ -19,7 +19,6 @@ package com.android.server.wm;
 import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_ATM;
 import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_WITH_CLASS_NAME;
 
-import android.annotation.DimenRes;
 import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
@@ -29,11 +28,11 @@ import android.provider.DeviceConfig;
 
 import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.wm.utils.DimenPxIntSupplier;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.function.Function;
-import java.util.function.IntSupplier;
 
 /** Reads letterbox configs from resources and controls their overrides at runtime. */
 final class LetterboxConfiguration {
@@ -308,34 +307,6 @@ final class LetterboxConfiguration {
     // Flags dynamically updated with {@link android.provider.DeviceConfig}.
     @NonNull private final SynchedDeviceConfig mDeviceConfig;
 
-    // Cached version of IntSupplier customised to evaluate new dimen in pixels
-    // when density changes
-    private static class DimenPxIntSupplier implements IntSupplier {
-
-        @NonNull
-        private final Context mContext;
-
-        private final int mResourceId;
-
-        private float mLastDensity = Float.MIN_VALUE;
-        private int mValue = 0;
-
-        private DimenPxIntSupplier(@NonNull Context context, @DimenRes int resourceId) {
-            mContext = context;
-            mResourceId = resourceId;
-        }
-
-        @Override
-        public int getAsInt() {
-            final float newDensity = mContext.getResources().getDisplayMetrics().density;
-            if (newDensity != mLastDensity) {
-                mLastDensity = newDensity;
-                mValue = mContext.getResources().getDimensionPixelSize(mResourceId);
-            }
-            return mValue;
-        }
-    }
-
     LetterboxConfiguration(@NonNull final Context systemUiContext) {
         this(systemUiContext, new LetterboxConfigurationPersister(
                 () -> readLetterboxHorizontalReachabilityPositionFromConfig(
diff --git a/services/core/java/com/android/server/wm/utils/DimenPxIntSupplier.java b/services/core/java/com/android/server/wm/utils/DimenPxIntSupplier.java
new file mode 100644
index 000000000000..5e4934500154
--- /dev/null
+++ b/services/core/java/com/android/server/wm/utils/DimenPxIntSupplier.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2024 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.server.wm.utils;
+
+import android.annotation.DimenRes;
+import android.annotation.NonNull;
+import android.content.Context;
+
+import java.util.function.IntSupplier;
+
+/**
+ * Cached version of IntSupplier customised to evaluate new dimen in pixels
+ * when density changes.
+ * @hide
+ */
+public class DimenPxIntSupplier implements IntSupplier {
+
+    @NonNull
+    private final Context mContext;
+
+    private final int mResourceId;
+
+    private float mLastDensity = Float.MIN_VALUE;
+    private int mValue = 0;
+
+    public DimenPxIntSupplier(@NonNull Context context, @DimenRes int resourceId) {
+        mContext = context;
+        mResourceId = resourceId;
+    }
+
+    @Override
+    public int getAsInt() {
+        final float newDensity = mContext.getResources().getDisplayMetrics().density;
+        if (newDensity != mLastDensity) {
+            mLastDensity = newDensity;
+            mValue = mContext.getResources().getDimensionPixelSize(mResourceId);
+        }
+        return mValue;
+    }
+}