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// Copyright (c) 2012 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/ui/alternate_error_tab_observer.h"
#include "chrome/browser/google/google_util.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/chrome_notification_types.h"
#include "chrome/common/pref_names.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
using content::RenderViewHost;
using content::WebContents;
AlternateErrorPageTabObserver::AlternateErrorPageTabObserver(
WebContents* web_contents,
Profile* profile)
: content::WebContentsObserver(web_contents),
profile_(profile) {
PrefService* prefs = profile_->GetPrefs();
if (prefs) {
pref_change_registrar_.Init(prefs);
pref_change_registrar_.Add(prefs::kAlternateErrorPagesEnabled, this);
}
registrar_.Add(this, chrome::NOTIFICATION_GOOGLE_URL_UPDATED,
content::Source<Profile>(profile_->GetOriginalProfile()));
}
AlternateErrorPageTabObserver::~AlternateErrorPageTabObserver() {
}
// static
void AlternateErrorPageTabObserver::RegisterUserPrefs(PrefService* prefs) {
prefs->RegisterBooleanPref(prefs::kAlternateErrorPagesEnabled, true,
PrefService::SYNCABLE_PREF);
}
////////////////////////////////////////////////////////////////////////////////
// WebContentsObserver overrides
void AlternateErrorPageTabObserver::RenderViewCreated(
RenderViewHost* render_view_host) {
UpdateAlternateErrorPageURL(render_view_host);
}
////////////////////////////////////////////////////////////////////////////////
// content::NotificationObserver overrides
void AlternateErrorPageTabObserver::Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
if (type == chrome::NOTIFICATION_PREF_CHANGED) {
DCHECK_EQ(profile_->GetPrefs(), content::Source<PrefService>(source).ptr());
DCHECK_EQ(std::string(prefs::kAlternateErrorPagesEnabled),
*content::Details<std::string>(details).ptr());
} else {
DCHECK_EQ(chrome::NOTIFICATION_GOOGLE_URL_UPDATED, type);
}
UpdateAlternateErrorPageURL(web_contents()->GetRenderViewHost());
}
////////////////////////////////////////////////////////////////////////////////
// Internal helpers
GURL AlternateErrorPageTabObserver::GetAlternateErrorPageURL() const {
GURL url;
// Disable alternate error pages when in Incognito mode.
if (profile_->IsOffTheRecord())
return url;
if (profile_->GetPrefs()->GetBoolean(prefs::kAlternateErrorPagesEnabled)) {
url = google_util::AppendGoogleLocaleParam(
GURL(google_util::kLinkDoctorBaseURL));
url = google_util::AppendGoogleTLDParam(profile_, url);
}
return url;
}
void AlternateErrorPageTabObserver::UpdateAlternateErrorPageURL(
RenderViewHost* rvh) {
rvh->SetAltErrorPageURL(GetAlternateErrorPageURL());
}
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