New files

Author: camsim99

packages/camera/camera_android_camerax/android/src/main/java/io/flutter/plugins/camerax/FocusMeteringResultHostApiImpl.java

@@ -0,0 +1,77 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package io.flutter.plugins.camerax;
+
+import android.util.Size;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.camera.core.MeteringPoint;
+import androidx.camera.core.MeteringPointFactory;
+import androidx.camera.core.SurfaceMeteringPointFactory;
+import io.flutter.plugins.camerax.GeneratedCameraXLibrary.MeteringPointHostApi;
+
+/**
+ * Host API implementation for {@link MeteringPoint}.
+ *
+ * <p>This class handles instantiating and adding native object instances that are attached to a
+ * Dart instance or handle method calls on the associated native class or an instance of the class.
+ */
+public class MeteringPointHostApiImpl implements MeteringPointHostApi {
+  private final InstanceManager instanceManager;
+  private final MeteringPointProxy proxy;
+
+  /** Proxy for constructors and static method of {@link MeteringPoint}. */
+  @VisibleForTesting
+  public static class MeteringPointProxy {
+
+    public void create(@NonNull Double x, @NonNull Double y, @Nullable Double size) {
+        SurfaceOrientedMeteringPointFactory factory = new SurfaceOrientedMeteringPointFactory(1f, 1f); // TODO(camsim99): get feedback on using this default instead of exposing
+        if (size == null) {
+            return factory.createPoint(x, y);
+        } else {
+            return factory.createPoint(x, y, size);
+        }
+    }
+
+    @NonNull 
+    public float getDefaultPointSize() {
+        return MeteringPointFactory.getDefaultPointSize();
+    }
+  }
+  /**
+   * Constructs a {@link MeteringPointHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   */
+  public MeteringPointHostApiImpl(@NonNull InstanceManager instanceManager) {
+    this(instanceManager, new MeteringPointProxy());
+  }
+
+  /**
+   * Constructs a {@link MeteringPointHostApiImpl}.
+   *
+   * @param instanceManager maintains instances stored to communicate with attached Dart objects
+   * @param proxy proxy for constructors and static method of {@link MeteringPoint}
+   */
+  @VisibleForTesting
+  MeteringPointHostApiImpl(
+      @NonNull InstanceManager instanceManager, @NonNull MeteringPointProxy proxy) {
+    this.instanceManager = instanceManager;
+    this.proxy = proxy;
+  }
+
+  @Override
+  public void create(@NonNull Long identifier, @NonNull Double x, @NonNull Double y, @Nullable Double size) {
+    MeteringPoint meteringPoint = proxy.create(x, y, size);
+    instanceManager.addDartCreatedInstance(meteringPoint, identifier);
+  }
+
+  @Override
+  @NonNull 
+  public Double getDefaultPointSize() {
+    return (Double) proxy.getDefaultPointSize;
+  }
+}