chrome/browser/android/contextualsearch/contextual_search_tab_helper.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/android/contextualsearch/contextual_search_tab_helper.h"
   6
   7 #include "base/android/jni_android.h"
   8 #include "base/android/jni_string.h"
   9 #include "base/prefs/pref_change_registrar.h"
  10 #include "chrome/browser/profiles/profile.h"
  11 #include "chrome/browser/profiles/profile_android.h"
  12 #include "chrome/common/pref_names.h"
  13 #include "jni/ContextualSearchTabHelper_jni.h"
  14
  15
  16 ContextualSearchTabHelper::ContextualSearchTabHelper(JNIEnv* env,
  17                                                      jobject obj,
  18                                                      Profile* profile)
  19     : weak_java_ref_(env, obj),
  20       pref_change_registrar_(new PrefChangeRegistrar()),
  21       weak_factory_(this) {
  22   pref_change_registrar_->Init(profile->GetPrefs());
  23   pref_change_registrar_->Add(
  24       prefs::kContextualSearchEnabled,
  25       base::Bind(&ContextualSearchTabHelper::OnContextualSearchPrefChanged,
  26                  weak_factory_.GetWeakPtr()));
  27 }
  28
  29 ContextualSearchTabHelper::~ContextualSearchTabHelper() {
  30   pref_change_registrar_->RemoveAll();
  31 }
  32
  33 void ContextualSearchTabHelper::OnContextualSearchPrefChanged() {
  34   JNIEnv* env = base::android::AttachCurrentThread();
  35   ScopedJavaLocalRef<jobject> jobj = weak_java_ref_.get(env);
  36   Java_ContextualSearchTabHelper_onContextualSearchPrefChanged(env, jobj.obj());
  37 }
  38
  39 void ContextualSearchTabHelper::Destroy(JNIEnv* env, jobject obj) {
  40   delete this;
  41 }
  42
  43 static jlong Init(JNIEnv* env,
  44                   const JavaParamRef<jobject>& obj,
  45                   const JavaParamRef<jobject>& java_profile) {
  46   Profile* profile = ProfileAndroid::FromProfileAndroid(java_profile);
  47   CHECK(profile);
  48   ContextualSearchTabHelper* tab = new ContextualSearchTabHelper(
  49       env, obj, profile);
  50   return reinterpret_cast<intptr_t>(tab);
  51 }
  52
  53 bool RegisterContextualSearchTabHelper(JNIEnv* env) {
  54   return RegisterNativesImpl(env);
  55 }