text: // 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/extensions/api/settings_private/settings_private_delegate.h"
  
  #include <utility>
  
  #include "base/prefs/pref_service.h"
  #include "base/values.h"
  #include "chrome/browser/browser_process.h"
  #include "chrome/browser/chromeos/settings/cros_settings.h"
  #include "chrome/browser/extensions/api/settings_private/prefs_util.h"
  #include "chrome/browser/profiles/profile.h"
  #include "chrome/browser/ui/zoom/chrome_zoom_level_prefs.h"
  #include "chrome/common/pref_names.h"
  #include "content/public/common/page_zoom.h"
  #include "extensions/browser/extension_registry.h"
  #include "extensions/common/extension.h"
  #include "url/gurl.h"
  
  namespace extensions {
  
  namespace settings_private = api::settings_private;
  
  SettingsPrivateDelegate::SettingsPrivateDelegate(Profile* profile)
      : profile_(profile) {
    prefs_util_.reset(new PrefsUtil(profile));
  }
  
  SettingsPrivateDelegate::~SettingsPrivateDelegate() {
  }
  
  scoped_ptr<base::Value> SettingsPrivateDelegate::GetPref(
      const std::string& name) {
    scoped_ptr<api::settings_private::PrefObject> pref =
        prefs_util_->GetPref(name);
    if (!pref)
      return base::Value::CreateNullValue();
    return pref->ToValue();
  }
  
  scoped_ptr<base::Value> SettingsPrivateDelegate::GetAllPrefs() {
    scoped_ptr<base::ListValue> prefs(new base::ListValue());
  
    const TypedPrefMap& keys = prefs_util_->GetWhitelistedKeys();
    for (const auto& it : keys) {
      scoped_ptr<base::Value> pref = GetPref(it.first);
      if (!pref->IsType(base::Value::TYPE_NULL))
        prefs->Append(pref.release());
    }
  
    return std::move(prefs);
  }
  
  PrefsUtil::SetPrefResult SettingsPrivateDelegate::SetPref(
      const std::string& pref_name, const base::Value* value) {
    return prefs_util_->SetPref(pref_name, value);
  }
  
  scoped_ptr<base::Value> SettingsPrivateDelegate::GetDefaultZoomPercent() {
    double zoom = content::ZoomLevelToZoomFactor(
        profile_->GetZoomLevelPrefs()->GetDefaultZoomLevelPref()) * 100;
    scoped_ptr<base::Value> value(new base::FundamentalValue(zoom));
    return value;
  }
  
  PrefsUtil::SetPrefResult SettingsPrivateDelegate::SetDefaultZoomPercent(
      int percent) {
    double zoom_factor = content::ZoomFactorToZoomLevel(percent * 0.01);
    profile_->GetZoomLevelPrefs()->SetDefaultZoomLevelPref(zoom_factor);
    return PrefsUtil::SetPrefResult::SUCCESS;
  }
  
  }  // namespace extensions
  