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// Copyright (c) 2010 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/dom_ui/shown_sections_handler.h"
#include "base/callback.h"
#include "base/command_line.h"
#include "base/string_number_conversions.h"
#include "base/values.h"
#include "chrome/browser/metrics/user_metrics.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profile.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/common/extensions/extension.h"
#include "chrome/common/notification_details.h"
#include "chrome/common/notification_type.h"
#include "chrome/common/pref_names.h"
namespace {
// Will cause an UMA notification if the mode of the new tab page
// was changed to hide/show the most visited thumbnails.
void NotifySectionDisabled(int new_mode, int old_mode, Profile *profile) {
// If the oldmode HAD either thumbs or lists visible.
bool old_had_it = (old_mode & THUMB) || (old_mode & LIST);
bool new_has_it = (new_mode & THUMB) || (new_mode & LIST);
if (old_had_it && !new_has_it) {
UserMetrics::RecordAction(
UserMetricsAction("ShowSections_RecentSitesDisabled"),
profile);
}
if (new_has_it && !old_had_it) {
UserMetrics::RecordAction(
UserMetricsAction("ShowSections_RecentSitesEnabled"),
profile);
}
}
} // namespace
ShownSectionsHandler::ShownSectionsHandler(PrefService* pref_service)
: pref_service_(pref_service) {
pref_service_->AddPrefObserver(prefs::kNTPShownSections, this);
}
ShownSectionsHandler::~ShownSectionsHandler() {
pref_service_->RemovePrefObserver(prefs::kNTPShownSections, this);
}
void ShownSectionsHandler::RegisterMessages() {
dom_ui_->RegisterMessageCallback("getShownSections",
NewCallback(this, &ShownSectionsHandler::HandleGetShownSections));
dom_ui_->RegisterMessageCallback("setShownSections",
NewCallback(this, &ShownSectionsHandler::HandleSetShownSections));
}
void ShownSectionsHandler::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK(NotificationType::PREF_CHANGED == type);
std::string* pref_name = Details<std::string>(details).ptr();
DCHECK(*pref_name == prefs::kNTPShownSections);
int sections = pref_service_->GetInteger(prefs::kNTPShownSections);
FundamentalValue sections_value(sections);
dom_ui_->CallJavascriptFunction(L"setShownSections", sections_value);
}
void ShownSectionsHandler::HandleGetShownSections(const ListValue* args) {
int sections = pref_service_->GetInteger(prefs::kNTPShownSections);
FundamentalValue sections_value(sections);
dom_ui_->CallJavascriptFunction(L"onShownSections", sections_value);
}
void ShownSectionsHandler::HandleSetShownSections(const ListValue* args) {
int mode;
CHECK(ExtractIntegerValue(args, &mode));
int old_mode = pref_service_->GetInteger(prefs::kNTPShownSections);
if (old_mode != mode) {
NotifySectionDisabled(mode, old_mode, dom_ui_->GetProfile());
pref_service_->SetInteger(prefs::kNTPShownSections, mode);
}
}
// static
void ShownSectionsHandler::RegisterUserPrefs(PrefService* pref_service) {
pref_service->RegisterIntegerPref(prefs::kNTPShownSections,
THUMB | RECENT | TIPS | SYNC);
}
// static
void ShownSectionsHandler::MigrateUserPrefs(PrefService* pref_service,
int old_pref_version,
int new_pref_version) {
bool changed = false;
int shown_sections = pref_service->GetInteger(prefs::kNTPShownSections);
if (old_pref_version < 1) {
// TIPS was used in early builds of the NNTP but since it was removed before
// Chrome 3.0 we want to ensure that it is shown by default.
shown_sections |= TIPS | SYNC;
changed = true;
}
if (old_pref_version < 2) {
// LIST is no longer used. Change to THUMB.
shown_sections &= ~LIST;
shown_sections |= THUMB;
changed = true;
}
if (changed)
pref_service->SetInteger(prefs::kNTPShownSections, shown_sections);
}
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