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// Copyright 2013 The Chromium Authors
// 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/ash/slow/slow_ui.h"
#include <memory>
#include <string>
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.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/browser_resources.h"
#include "chrome/grit/generated_resources.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.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 "ui/base/webui/jstemplate_builder.h"
#include "ui/base/webui/web_ui_util.h"
#include "ui/webui/webui_util.h"
using content::WebUIMessageHandler;
namespace {
// JS API callbacks names.
const char kJsApiDisableTracing[] = "disableTracing";
const char kJsApiEnableTracing[] = "enableTracing";
const char kJsApiLoadComplete[] = "loadComplete";
} // namespace
namespace ash {
void CreateAndAddSlowUIHTMLSource(Profile* profile) {
content::WebUIDataSource* source = content::WebUIDataSource::CreateAndAdd(
profile, chrome::kChromeUISlowHost);
static constexpr webui::LocalizedString kStrings[] = {
{"slowDisable", IDS_SLOW_DISABLE},
{"slowEnable", IDS_SLOW_ENABLE},
{"slowDescription", IDS_SLOW_DESCRIPTION},
{"slowWarning", IDS_SLOW_WARNING},
};
source->AddLocalizedStrings(kStrings);
source->AddResourcePath("slow.js", IDR_SLOW_JS);
source->AddResourcePath("slow.css", IDR_SLOW_CSS);
source->SetDefaultResource(IDR_SLOW_HTML);
}
// The handler for Javascript messages related to the "slow" view.
class SlowHandler : public WebUIMessageHandler {
public:
explicit SlowHandler(Profile* profile);
SlowHandler(const SlowHandler&) = delete;
SlowHandler& operator=(const SlowHandler&) = delete;
~SlowHandler() override;
// WebUIMessageHandler implementation.
void RegisterMessages() override;
void OnJavascriptAllowed() override;
void OnJavascriptDisallowed() override;
private:
void UpdatePage();
// Handlers for JS WebUI messages.
void HandleDisable(const base::Value::List& args);
void HandleEnable(const base::Value::List& args);
void LoadComplete(const base::Value::List& args);
raw_ptr<Profile> profile_;
std::unique_ptr<PrefChangeRegistrar> user_pref_registrar_;
};
// SlowHandler ------------------------------------------------------------
SlowHandler::SlowHandler(Profile* profile) : profile_(profile) {
user_pref_registrar_ = std::make_unique<PrefChangeRegistrar>();
user_pref_registrar_->Init(profile_->GetPrefs());
}
SlowHandler::~SlowHandler() = default;
void SlowHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
kJsApiDisableTracing,
base::BindRepeating(&SlowHandler::HandleDisable, base::Unretained(this)));
web_ui()->RegisterMessageCallback(
kJsApiEnableTracing,
base::BindRepeating(&SlowHandler::HandleEnable, base::Unretained(this)));
web_ui()->RegisterMessageCallback(
kJsApiLoadComplete,
base::BindRepeating(&SlowHandler::LoadComplete, base::Unretained(this)));
}
void SlowHandler::OnJavascriptAllowed() {
user_pref_registrar_->Add(
prefs::kPerformanceTracingEnabled,
base::BindRepeating(&SlowHandler::UpdatePage, base::Unretained(this)));
}
void SlowHandler::OnJavascriptDisallowed() {
user_pref_registrar_->RemoveAll();
}
void SlowHandler::HandleDisable(const base::Value::List& args) {
PrefService* pref_service = profile_->GetPrefs();
pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, false);
}
void SlowHandler::HandleEnable(const base::Value::List& args) {
PrefService* pref_service = profile_->GetPrefs();
pref_service->SetBoolean(prefs::kPerformanceTracingEnabled, true);
}
void SlowHandler::LoadComplete(const base::Value::List& args) {
AllowJavascript();
UpdatePage();
}
void SlowHandler::UpdatePage() {
PrefService* pref_service = profile_->GetPrefs();
bool enabled = pref_service->GetBoolean(prefs::kPerformanceTracingEnabled);
base::Value pref_value(enabled);
FireWebUIListener("tracing-pref-changed", pref_value);
}
// SlowUI -----------------------------------------------------------------
SlowUI::SlowUI(content::WebUI* web_ui) : WebUIController(web_ui) {
Profile* profile = Profile::FromWebUI(web_ui);
web_ui->AddMessageHandler(std::make_unique<SlowHandler>(profile));
// Set up the chrome://slow/ source.
CreateAndAddSlowUIHTMLSource(profile);
}
} // namespace ash
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