Add component for feature engagement tracking.

components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/android/scoped_java_ref.h"
+#include "components/feature_engagement_tracker/public/feature_engagement_tracker.h"
+#include "jni/FeatureEngagementTrackerImpl_jni.h"
+
+namespace feature_engagement_tracker {
+
+// static
+bool FeatureEngagementTrackerImplAndroid::RegisterJni(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// static
+FeatureEngagementTrackerImplAndroid*
+FeatureEngagementTrackerImplAndroid::FromJavaObject(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj) {
+  return reinterpret_cast<FeatureEngagementTrackerImplAndroid*>(
+      Java_FeatureEngagementTrackerImpl_getNativePtr(env, jobj));
+}
+
+// This function is declared in
+// //components/feature_engagement_tracker/public/feature_engagement_tracker.h
+// and should be linked in to any binary using
+// FeatureEngagementTracker::GetJavaObject.
+// static
+base::android::ScopedJavaLocalRef<jobject>
+FeatureEngagementTracker::GetJavaObject(
+    FeatureEngagementTracker* feature_engagement_tracker) {
+  FeatureEngagementTrackerImplAndroid* feature_engagement_tracker_impl_android =
+      static_cast<FeatureEngagementTrackerImplAndroid*>(
+          feature_engagement_tracker);
+  return feature_engagement_tracker_impl_android->GetJavaObject();
+}
+
+FeatureEngagementTrackerImplAndroid::FeatureEngagementTrackerImplAndroid() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+
+  java_obj_.Reset(env, Java_FeatureEngagementTrackerImpl_create(
+                           env, reinterpret_cast<intptr_t>(this))
+                           .obj());
+}
+
+FeatureEngagementTrackerImplAndroid::~FeatureEngagementTrackerImplAndroid() {
+  Java_FeatureEngagementTrackerImpl_clearNativePtr(
+      base::android::AttachCurrentThread(), java_obj_);
+}
+
+base::android::ScopedJavaLocalRef<jobject>
+FeatureEngagementTrackerImplAndroid::GetJavaObject() {
+  return base::android::ScopedJavaLocalRef<jobject>(java_obj_);
+}
+
+void FeatureEngagementTrackerImplAndroid::EventJava(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jstring>& jfeature,
+    const base::android::JavaParamRef<jstring>& jprecondition) {
+  std::string feature = ConvertJavaStringToUTF8(env, jfeature);
+  std::string precondition = ConvertJavaStringToUTF8(env, jprecondition);
+  Event(feature, precondition);
+}
+
+void FeatureEngagementTrackerImplAndroid::UsedJava(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jstring>& jfeature) {
+  std::string feature = ConvertJavaStringToUTF8(env, jfeature);
+  Used(feature);
+}
+
+bool FeatureEngagementTrackerImplAndroid::TriggerJava(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jstring>& jfeature) {
+  std::string feature = ConvertJavaStringToUTF8(env, jfeature);
+  return Trigger(feature);
+}
+
+void FeatureEngagementTrackerImplAndroid::DismissedJava(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj) {
+  Dismissed();
+}
+
+void FeatureEngagementTrackerImplAndroid::AddOnInitializedCallbackJava(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jobject>& j_callback_obj) {
+  // TODO(nyquist): Implement support for the wrapped base::Callback.
+}
+
+}  // namespace feature_engagement_tracker