chrome/browser/ui/webui/settings/appearance_handler.cc

   1 // Copyright (c) 2015 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/settings/appearance_handler.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/values.h"
  10 #include "chrome/browser/chrome_notification_types.h"
  11 #include "chrome/browser/profiles/profile.h"
  12 #include "chrome/browser/themes/theme_service.h"
  13 #include "chrome/browser/themes/theme_service_factory.h"
  14 #include "content/public/browser/notification_source.h"
  15 #include "content/public/browser/web_ui.h"
  16
  17 namespace settings {
  18
  19 AppearanceHandler::AppearanceHandler(content::WebUI* webui)
  20     : profile_(Profile::FromWebUI(webui)) {
  21   registrar_.Add(this, chrome::NOTIFICATION_BROWSER_THEME_CHANGED,
  22                  content::Source<ThemeService>(
  23                      ThemeServiceFactory::GetForProfile(profile_)));
  24 }
  25
  26 AppearanceHandler::~AppearanceHandler() {
  27   registrar_.RemoveAll();
  28 }
  29
  30 void AppearanceHandler::RegisterMessages() {
  31   web_ui()->RegisterMessageCallback(
  32       "resetTheme",
  33       base::Bind(&AppearanceHandler::ResetTheme, base::Unretained(this)));
  34   web_ui()->RegisterMessageCallback(
  35       "getResetThemeEnabled",
  36       base::Bind(&AppearanceHandler::GetResetThemeEnabled,
  37                  base::Unretained(this)));
  38 }
  39
  40 void AppearanceHandler::Observe(
  41     int type,
  42     const content::NotificationSource& source,
  43     const content::NotificationDetails& details) {
  44   switch (type) {
  45     case chrome::NOTIFICATION_BROWSER_THEME_CHANGED: {
  46       base::StringValue event("reset-theme-enabled-changed");
  47       base::FundamentalValue enabled(QueryResetThemeEnabledState());
  48       web_ui()->CallJavascriptFunction(
  49           "cr.webUIListenerCallback", event, enabled);
  50       break;
  51     }
  52     default:
  53       NOTREACHED();
  54   }
  55 }
  56
  57 void AppearanceHandler::ResetTheme(const base::ListValue* /* args */) {
  58   Profile* profile = Profile::FromWebUI(web_ui());
  59   ThemeServiceFactory::GetForProfile(profile)->UseDefaultTheme();
  60 }
  61
  62 base::FundamentalValue AppearanceHandler::QueryResetThemeEnabledState() {
  63   ThemeService* theme_service = ThemeServiceFactory::GetForProfile(profile_);
  64   bool is_system_theme = false;
  65
  66   // TODO(jhawkins): Handle native/system theme button.
  67
  68   bool is_classic_theme = !is_system_theme &&
  69                           theme_service->UsingDefaultTheme();
  70   return base::FundamentalValue(!is_classic_theme);
  71 }
  72
  73 void AppearanceHandler::GetResetThemeEnabled(const base::ListValue* args) {
  74   CHECK_EQ(2U, args->GetSize());
  75
  76   std::string callbackFn;
  77   CHECK(args->GetString(0, &callbackFn));
  78   const base::Value* callbackId;
  79   CHECK(args->Get(1, &callbackId));
  80
  81   base::FundamentalValue enabled(QueryResetThemeEnabledState());
  82   web_ui()->CallJavascriptFunction(callbackFn, *callbackId, enabled);
  83 }
  84
  85 }  // namespace settings