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 {
+
+namespace {
+
+const char kFeatureEngagementTrackerImplAndroidKey[] =
+    "feature_engagement_tracker_impl_android";
+
+FeatureEngagementTrackerImplAndroid* FromFeatureEngagementTrackerImpl(
+    FeatureEngagementTracker* feature_engagement_tracker) {
+  FeatureEngagementTrackerImpl* impl =
+      static_cast<FeatureEngagementTrackerImpl*>(feature_engagement_tracker);
+  FeatureEngagementTrackerImplAndroid* impl_android =
+      static_cast<FeatureEngagementTrackerImplAndroid*>(
+          impl->GetUserData(kFeatureEngagementTrackerImplAndroidKey));
+  if (!impl_android) {
+    impl_android = new FeatureEngagementTrackerImplAndroid(impl);
+    impl->SetUserData(kFeatureEngagementTrackerImplAndroidKey, impl_android);
+  }
+  return impl_android;
+}
+
+}  // namespace
+
+// 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) {
+  return FromFeatureEngagementTrackerImpl(feature_engagement_tracker)
+      ->GetJavaObject();
+}
+
+FeatureEngagementTrackerImplAndroid::FeatureEngagementTrackerImplAndroid(
+    FeatureEngagementTrackerImpl* feature_engagement_tracker_impl)
+    : feature_engagement_tracker_impl_(feature_engagement_tracker_impl) {
+  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::Event(
+    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);
+  feature_engagement_tracker_impl_->Event(feature, precondition);
+}
+
+void FeatureEngagementTrackerImplAndroid::Used(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jstring>& jfeature) {
+  std::string feature = ConvertJavaStringToUTF8(env, jfeature);
+  feature_engagement_tracker_impl_->Used(feature);
+}
+
+bool FeatureEngagementTrackerImplAndroid::Trigger(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj,
+    const base::android::JavaParamRef<jstring>& jfeature) {
+  std::string feature = ConvertJavaStringToUTF8(env, jfeature);
+  return feature_engagement_tracker_impl_->Trigger(feature);
+}
+
+void FeatureEngagementTrackerImplAndroid::Dismissed(
+    JNIEnv* env,
+    const base::android::JavaRef<jobject>& jobj) {
+  feature_engagement_tracker_impl_->Dismissed();
+}
+
+void FeatureEngagementTrackerImplAndroid::AddOnInitializedCallback(
+    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