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// Copyright 2013 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/webui/chromeos/slow_ui.h"
#include <string>
#include "base/bind.h"
#include "base/prefs/pref_change_registrar.h"
#include "base/prefs/pref_service.h"
#include "base/values.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "chrome/common/url_constants.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "content/public/browser/web_ui_message_handler.h"
#include "grit/browser_resources.h"
#include "ui/base/webui/jstemplate_builder.h"
#include "ui/base/webui/web_ui_util.h"
using content::WebUIMessageHandler;
namespace {
// JS API callbacks names.
const char kJsApiDisableTracing[] = "disableTracing";
const char kJsApiEnableTracing[] = "enableTracing";
const char kJsApiLoadComplete[] = "loadComplete";
// Page JS API function names.
const char kJsApiTracingPrefChanged[] = "options.Slow.tracingPrefChanged";
} // namespace
namespace chromeos {
content::WebUIDataSource* CreateSlowUIHTMLSource() {
content::WebUIDataSource* source =
content::WebUIDataSource::Create(chrome::kChromeUISlowHost);
source->AddLocalizedString("slowDisable", IDS_SLOW_DISABLE);
source->AddLocalizedString("slowEnable", IDS_SLOW_ENABLE);
source->AddLocalizedString("slowDescription", IDS_SLOW_DESCRIPTION);
source->AddLocalizedString("slowWarning", IDS_SLOW_WARNING);
source->SetJsonPath("strings.js");
source->AddResourcePath("slow.js", IDR_SLOW_JS);
source->SetDefaultResource(IDR_SLOW_HTML);
return source;
}
// The handler for Javascript messages related to the "slow" view.
class SlowHandler : public WebUIMessageHandler {
public:
explicit SlowHandler(Profile* profile);
virtual ~SlowHandler();
// WebUIMessageHandler implementation.
virtual void RegisterMessages() override;
private:
void UpdatePage();
// Handlers for JS WebUI messages.
void HandleDisable(const base::ListValue* args);
void HandleEnable(const base::ListValue* args);
void LoadComplete(const base::ListValue* args);
Profile* profile_;
scoped_ptr<PrefChangeRegistrar> user_pref_registrar_;
DISALLOW_COPY_AND_ASSIGN(SlowHandler);
};
// SlowHandler ------------------------------------------------------------
SlowHandler::SlowHandler(Profile* profile) : profile_(profile) {
}
SlowHandler::~SlowHandler() {
}
void SlowHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(kJsApiDisableTracing,
base::Bind(&SlowHandler::HandleDisable, base::Unretained(this)));
web_ui()->RegisterMessageCallback(kJsApiEnableTracing,
base::Bind(&SlowHandler::HandleEnable, base::Unretained(this)));
web_ui()->RegisterMessageCallback(kJsApiLoadComplete,
base::Bind(&SlowHandler::LoadComplete, base::Unretained(this)));
user_pref_registrar_.reset(new PrefChangeRegistrar);
user_pref_registrar_->Init(profile_->GetPrefs());
user_pref_registrar_->Add(prefs::kPerformanceTracingEnabled,
base::Bind(&SlowHandler::UpdatePage,
base::Unretained(this)));
}
void SlowHandler::HandleDisable(const base::ListValue* args) {
PrefService* pref_service = profile_->GetPrefs();
pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, false);
}
void SlowHandler::HandleEnable(const base::ListValue* args) {
PrefService* pref_service = profile_->GetPrefs();
pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, true);
}
void SlowHandler::LoadComplete(const base::ListValue* args) {
UpdatePage();
}
void SlowHandler::UpdatePage() {
PrefService* pref_service = profile_->GetPrefs();
bool enabled = pref_service->GetBoolean(prefs::kPerformanceTracingEnabled);
base::FundamentalValue pref_value(enabled);
web_ui()->CallJavascriptFunction(kJsApiTracingPrefChanged, pref_value);
}
// SlowUI -----------------------------------------------------------------
SlowUI::SlowUI(content::WebUI* web_ui) : WebUIController(web_ui) {
Profile* profile = Profile::FromWebUI(web_ui);
SlowHandler* handler = new SlowHandler(profile);
web_ui->AddMessageHandler(handler);
// Set up the chrome://slow/ source.
content::WebUIDataSource::Add(profile, CreateSlowUIHTMLSource());
}
} // namespace chromeos
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