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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/string_util.h"
#include "base/values.h"
#include "chrome/browser/metrics/user_metrics.h"
#include "chrome/browser/pref_service.h"
#include "chrome/browser/profile.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
void ShownSectionsHandler::RegisterMessages() {
dom_ui_->RegisterMessageCallback("getShownSections",
NewCallback(this, &ShownSectionsHandler::HandleGetShownSections));
dom_ui_->RegisterMessageCallback("setShownSections",
NewCallback(this, &ShownSectionsHandler::HandleSetShownSections));
}
void ShownSectionsHandler::HandleGetShownSections(const Value* value) {
const int mode = dom_ui_->GetProfile()->GetPrefs()->
GetInteger(prefs::kNTPShownSections);
FundamentalValue mode_value(mode);
dom_ui_->CallJavascriptFunction(L"onShownSections", mode_value);
}
void ShownSectionsHandler::HandleSetShownSections(const Value* value) {
if (!value->IsType(Value::TYPE_LIST)) {
NOTREACHED();
return;
}
const ListValue* list = static_cast<const ListValue*>(value);
std::string mode_string;
if (list->GetSize() < 1) {
NOTREACHED() << "setShownSections called with too few arguments";
return;
}
bool r = list->GetString(0, &mode_string);
DCHECK(r) << "Missing value in setShownSections from the NTP Most Visited.";
int mode = StringToInt(mode_string);
int old_mode = dom_ui_->GetProfile()->GetPrefs()->GetInteger(
prefs::kNTPShownSections);
if (old_mode != mode) {
NotifySectionDisabled(mode, old_mode, dom_ui_->GetProfile());
dom_ui_->GetProfile()->GetPrefs()->SetInteger(
prefs::kNTPShownSections, mode);
}
}
// static
void ShownSectionsHandler::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterIntegerPref(prefs::kNTPShownSections,
THUMB | RECENT | TIPS | SYNC);
}
// static
void ShownSectionsHandler::MigrateUserPrefs(PrefService* prefs,
int old_pref_version,
int new_pref_version) {
bool changed = false;
int shown_sections = prefs->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.
if (shown_sections | LIST) {
shown_sections &= ~LIST;
shown_sections |= THUMB;
changed = true;
}
}
if (changed)
prefs->SetInteger(prefs::kNTPShownSections, shown_sections);
}
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