arc-bridge: Introduce the ArcService class

chrome/browser/chromeos/arc/arc_settings_bridge_impl.cc

-// Copyright 2015 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 "chrome/browser/chromeos/arc/arc_settings_bridge_impl.h"
-
-#include <algorithm>
-
-#include "base/json/json_writer.h"
-#include "base/prefs/pref_service.h"
-#include "base/strings/stringprintf.h"
-#include "chrome/browser/profiles/profile_manager.h"
-#include "chrome/common/pref_names.h"
-#include "components/arc/common/settings.mojom.h"
-
-using ::chromeos::system::TimezoneSettings;
-
-namespace arc {
-
-namespace fontsizes {
-
-double ConvertFontSizeChromeToAndroid(int default_size,
-                                      int default_fixed_size,
-                                      int minimum_size) {
-  // kWebKitDefaultFixedFontSize is automatically set to be 3 pixels smaller
-  // than kWebKitDefaultFontSize when Chrome's settings page's main font
-  // dropdown control is adjusted.  If the user specifically sets a higher
-  // fixed font size we will want to take into account the adjustment.
-  default_fixed_size += 3;
-  int max_chrome_size =
-      std::max(std::max(default_fixed_size, default_size), minimum_size);
-
-  double android_scale = kAndroidFontScaleSmall;
-  if (max_chrome_size >= kChromeFontSizeVeryLarge) {
-    android_scale = kAndroidFontScaleHuge;
-  } else if (max_chrome_size >= kChromeFontSizeLarge) {
-    android_scale = kAndroidFontScaleLarge;
-  } else if (max_chrome_size >= kChromeFontSizeNormal) {
-    android_scale = kAndroidFontScaleNormal;
-  }
-
-  return android_scale;
-}
-
-}  // namespace fontsizes
-
-ArcSettingsBridgeImpl::~ArcSettingsBridgeImpl() {
-  ArcBridgeService* bridge_service = ArcBridgeService::Get();
-  DCHECK(bridge_service);
-  bridge_service->RemoveObserver(this);
-}
-
-void ArcSettingsBridgeImpl::StartObservingBridgeServiceChanges() {
-  ArcBridgeService* bridge_service = ArcBridgeService::Get();
-  DCHECK(bridge_service);
-  bridge_service->AddObserver(this);
-}
-
-void ArcSettingsBridgeImpl::StartObservingSettingsChanges() {
-  Profile* profile = ProfileManager::GetActiveUserProfile();
-  registrar_.Init(profile->GetPrefs());
-
-  AddPrefToObserve(prefs::kWebKitDefaultFixedFontSize);
-  AddPrefToObserve(prefs::kWebKitDefaultFontSize);
-  AddPrefToObserve(prefs::kWebKitMinimumFontSize);
-  AddPrefToObserve(prefs::kAccessibilitySpokenFeedbackEnabled);
-
-  TimezoneSettings::GetInstance()->AddObserver(this);
-}
-
-void ArcSettingsBridgeImpl::SyncAllPrefs() const {
-  SyncFontSize();
-  SyncLocale();
-  SyncSpokenFeedbackEnabled();
-  SyncTimeZone();
-}
-
-void ArcSettingsBridgeImpl::StopObservingSettingsChanges() {
-  registrar_.RemoveAll();
-
-  TimezoneSettings::GetInstance()->RemoveObserver(this);
-}
-
-void ArcSettingsBridgeImpl::AddPrefToObserve(const std::string& pref_name) {
-  registrar_.Add(pref_name, base::Bind(&ArcSettingsBridgeImpl::OnPrefChanged,
-                                       base::Unretained(this)));
-}
-
-void ArcSettingsBridgeImpl::OnPrefChanged(const std::string& pref_name) const {
-  if (pref_name == prefs::kAccessibilitySpokenFeedbackEnabled) {
-    SyncSpokenFeedbackEnabled();
-  } else if (pref_name == prefs::kWebKitDefaultFixedFontSize ||
-             pref_name == prefs::kWebKitDefaultFontSize ||
-             pref_name == prefs::kWebKitMinimumFontSize) {
-    SyncFontSize();
-  } else {
-    LOG(ERROR) << "Unknown pref changed.";
-  }
-}
-
-void ArcSettingsBridgeImpl::OnStateChanged(ArcBridgeService::State state) {
-  // ArcBridgeService::State::READY is emitted before ArcSettings app is ready
-  // to send broadcasts.  Instead we wait for the SettingsInstance to be ready.
-  if (state == ArcBridgeService::State::STOPPING) {
-    StopObservingSettingsChanges();
-  }
-}
-
-void ArcSettingsBridgeImpl::OnSettingsInstanceReady() {
-  StartObservingSettingsChanges();
-  SyncAllPrefs();
-}
-
-void ArcSettingsBridgeImpl::TimezoneChanged(const icu::TimeZone& timezone) {
-  SyncTimeZone();
-}
-
-int ArcSettingsBridgeImpl::GetIntegerPref(const std::string& pref_name) const {
-  const PrefService::Preference* pref =
-      registrar_.prefs()->FindPreference(pref_name);
-  DCHECK(pref);
-  int val = -1;
-  bool value_exists = pref->GetValue()->GetAsInteger(&val);
-  DCHECK(value_exists);
-  return val;
-}
-
-void ArcSettingsBridgeImpl::SyncFontSize() const {
-  int default_size = GetIntegerPref(prefs::kWebKitDefaultFontSize);
-  int default_fixed_size = GetIntegerPref(prefs::kWebKitDefaultFixedFontSize);
-  int minimum_size = GetIntegerPref(prefs::kWebKitMinimumFontSize);
-
-  double android_scale = fontsizes::ConvertFontSizeChromeToAndroid(
-      default_size, default_fixed_size, minimum_size);
-
-  base::DictionaryValue extras;
-  extras.SetDouble("scale", android_scale);
-  SendSettingsBroadcast("org.chromium.arc.settings.SET_FONT_SCALE", extras);
-}
-
-void ArcSettingsBridgeImpl::SyncSpokenFeedbackEnabled() const {
-  const PrefService::Preference* pref = registrar_.prefs()->FindPreference(
-      prefs::kAccessibilitySpokenFeedbackEnabled);
-  DCHECK(pref);
-  bool enabled = false;
-  bool value_exists = pref->GetValue()->GetAsBoolean(&enabled);
-  DCHECK(value_exists);
-  base::DictionaryValue extras;
-  extras.SetBoolean("enabled", enabled);
-  SendSettingsBroadcast("org.chromium.arc.settings.SET_SPOKEN_FEEDBACK_ENABLED",
-                        extras);
-}
-
-void ArcSettingsBridgeImpl::SyncLocale() const {
-  const PrefService::Preference* pref =
-      registrar_.prefs()->FindPreference(prefs::kApplicationLocale);
-  DCHECK(pref);
-  std::string locale;
-  bool value_exists = pref->GetValue()->GetAsString(&locale);
-  DCHECK(value_exists);
-  base::DictionaryValue extras;
-  extras.SetString("locale", locale);
-  SendSettingsBroadcast("org.chromium.arc.settings.SET_LOCALE", extras);
-}
-
-void ArcSettingsBridgeImpl::SyncTimeZone() const {
-  TimezoneSettings* timezone_settings = TimezoneSettings::GetInstance();
-  base::string16 timezoneID = timezone_settings->GetCurrentTimezoneID();
-  base::DictionaryValue extras;
-  extras.SetString("olsonTimeZone", timezoneID);
-  SendSettingsBroadcast("org.chromium.arc.settings.SET_TIME_ZONE", extras);
-}
-
-void ArcSettingsBridgeImpl::SendSettingsBroadcast(
-    const std::string& action,
-    const base::DictionaryValue& extras) const {
-  ArcBridgeService* bridge_service = ArcBridgeService::Get();
-  if (!bridge_service ||
-      bridge_service->state() != ArcBridgeService::State::READY) {
-    LOG(ERROR) << "Bridge service is not ready.";
-    return;
-  }
-
-  std::string extras_json;
-  bool write_success = base::JSONWriter::Write(extras, &extras_json);
-  DCHECK(write_success);
-  bridge_service->settings_instance()->SendBroadcast(
-      action, "org.chromium.arc.settings",
-      "org.chromium.arc.settings.SettingsReceiver", extras_json);
-}
-
-}  // namespace arc