1// Copyright 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/chromeos/slow_ui.h" 6 7#include <string> 8 9#include "base/bind.h" 10#include "base/prefs/pref_change_registrar.h" 11#include "base/prefs/pref_service.h" 12#include "base/values.h" 13#include "chrome/browser/profiles/profile.h" 14#include "chrome/common/pref_names.h" 15#include "chrome/common/url_constants.h" 16#include "chrome/grit/generated_resources.h" 17#include "content/public/browser/web_contents.h" 18#include "content/public/browser/web_ui.h" 19#include "content/public/browser/web_ui_data_source.h" 20#include "content/public/browser/web_ui_message_handler.h" 21#include "grit/browser_resources.h" 22#include "ui/base/webui/jstemplate_builder.h" 23#include "ui/base/webui/web_ui_util.h" 24 25using content::WebUIMessageHandler; 26 27namespace { 28 29// JS API callbacks names. 30const char kJsApiDisableTracing[] = "disableTracing"; 31const char kJsApiEnableTracing[] = "enableTracing"; 32const char kJsApiLoadComplete[] = "loadComplete"; 33 34// Page JS API function names. 35const char kJsApiTracingPrefChanged[] = "options.Slow.tracingPrefChanged"; 36 37} // namespace 38 39namespace chromeos { 40 41content::WebUIDataSource* CreateSlowUIHTMLSource() { 42 content::WebUIDataSource* source = 43 content::WebUIDataSource::Create(chrome::kChromeUISlowHost); 44 45 source->SetUseJsonJSFormatV2(); 46 source->AddLocalizedString("slowDisable", IDS_SLOW_DISABLE); 47 source->AddLocalizedString("slowEnable", IDS_SLOW_ENABLE); 48 source->AddLocalizedString("slowDescription", IDS_SLOW_DESCRIPTION); 49 source->AddLocalizedString("slowWarning", IDS_SLOW_WARNING); 50 51 source->SetJsonPath("strings.js"); 52 source->AddResourcePath("slow.js", IDR_SLOW_JS); 53 source->SetDefaultResource(IDR_SLOW_HTML); 54 return source; 55} 56 57// The handler for Javascript messages related to the "slow" view. 58class SlowHandler : public WebUIMessageHandler { 59 public: 60 explicit SlowHandler(Profile* profile); 61 virtual ~SlowHandler(); 62 63 // WebUIMessageHandler implementation. 64 virtual void RegisterMessages() OVERRIDE; 65 66 private: 67 void UpdatePage(); 68 69 // Handlers for JS WebUI messages. 70 void HandleDisable(const base::ListValue* args); 71 void HandleEnable(const base::ListValue* args); 72 void LoadComplete(const base::ListValue* args); 73 74 Profile* profile_; 75 scoped_ptr<PrefChangeRegistrar> user_pref_registrar_; 76 77 DISALLOW_COPY_AND_ASSIGN(SlowHandler); 78}; 79 80// SlowHandler ------------------------------------------------------------ 81 82SlowHandler::SlowHandler(Profile* profile) : profile_(profile) { 83} 84 85SlowHandler::~SlowHandler() { 86} 87 88void SlowHandler::RegisterMessages() { 89 web_ui()->RegisterMessageCallback(kJsApiDisableTracing, 90 base::Bind(&SlowHandler::HandleDisable, base::Unretained(this))); 91 web_ui()->RegisterMessageCallback(kJsApiEnableTracing, 92 base::Bind(&SlowHandler::HandleEnable, base::Unretained(this))); 93 web_ui()->RegisterMessageCallback(kJsApiLoadComplete, 94 base::Bind(&SlowHandler::LoadComplete, base::Unretained(this))); 95 96 user_pref_registrar_.reset(new PrefChangeRegistrar); 97 user_pref_registrar_->Init(profile_->GetPrefs()); 98 user_pref_registrar_->Add(prefs::kPerformanceTracingEnabled, 99 base::Bind(&SlowHandler::UpdatePage, 100 base::Unretained(this))); 101} 102 103void SlowHandler::HandleDisable(const base::ListValue* args) { 104 PrefService* pref_service = profile_->GetPrefs(); 105 pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, false); 106} 107 108void SlowHandler::HandleEnable(const base::ListValue* args) { 109 PrefService* pref_service = profile_->GetPrefs(); 110 pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, true); 111} 112 113void SlowHandler::LoadComplete(const base::ListValue* args) { 114 UpdatePage(); 115} 116 117void SlowHandler::UpdatePage() { 118 PrefService* pref_service = profile_->GetPrefs(); 119 bool enabled = pref_service->GetBoolean(prefs::kPerformanceTracingEnabled); 120 base::FundamentalValue pref_value(enabled); 121 web_ui()->CallJavascriptFunction(kJsApiTracingPrefChanged, pref_value); 122} 123 124// SlowUI ----------------------------------------------------------------- 125 126SlowUI::SlowUI(content::WebUI* web_ui) : WebUIController(web_ui) { 127 Profile* profile = Profile::FromWebUI(web_ui); 128 129 SlowHandler* handler = new SlowHandler(profile); 130 web_ui->AddMessageHandler(handler); 131 132 // Set up the chrome://slow/ source. 133 content::WebUIDataSource::Add(profile, CreateSlowUIHTMLSource()); 134} 135 136} // namespace chromeos 137 138