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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "chrome/browser/ui/webui/theme_handler.h"
      6 
      7 #include "base/values.h"
      8 #include "chrome/browser/chrome_notification_types.h"
      9 #include "chrome/browser/profiles/profile.h"
     10 #include "chrome/browser/themes/theme_service.h"
     11 #include "chrome/browser/themes/theme_service_factory.h"
     12 #include "chrome/browser/ui/webui/theme_source.h"
     13 #include "content/public/browser/notification_service.h"
     14 #include "content/public/browser/web_ui.h"
     15 #include "grit/theme_resources.h"
     16 
     17 ///////////////////////////////////////////////////////////////////////////////
     18 // ThemeHandler
     19 
     20 ThemeHandler::ThemeHandler() {
     21 }
     22 
     23 ThemeHandler::~ThemeHandler() {
     24 }
     25 
     26 void ThemeHandler::RegisterMessages() {
     27   // These are not actual message registrations, but can't be done in the
     28   // constructor since they need the web_ui value to be set, which is done
     29   // post-construction, but before registering messages.
     30   InitializeCSSCaches();
     31   // Listen for theme installation.
     32   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
     33                  content::Source<ThemeService>(
     34                      ThemeServiceFactory::GetForProfile(GetProfile())));
     35 }
     36 
     37 void ThemeHandler::Observe(int type,
     38                            const content::NotificationSource& source,
     39                            const content::NotificationDetails& details) {
     40   DCHECK_EQ(chrome::NOTIFICATION_BROWSER_THEME_CHANGED, type);
     41   InitializeCSSCaches();
     42   base::FundamentalValue attribution(
     43       ThemeServiceFactory::GetForProfile(GetProfile())->HasCustomImage(
     44           IDR_THEME_NTP_ATTRIBUTION));
     45   web_ui()->CallJavascriptFunction("ntp.themeChanged", attribution);
     46 }
     47 
     48 void ThemeHandler::InitializeCSSCaches() {
     49   Profile* profile = GetProfile();
     50   ThemeSource* theme = new ThemeSource(profile);
     51   content::URLDataSource::Add(profile, theme);
     52 }
     53 
     54 Profile* ThemeHandler::GetProfile() const {
     55   return Profile::FromWebUI(web_ui());
     56 }
     57