// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ios/chrome/browser/webui/ui_bundled/translate_internals/ios_translate_internals_handler.h"
#import <string_view>
#import "components/translate/core/common/language_detection_details.h"
#import "ios/chrome/browser/shared/model/application_context/application_context.h"
#import "ios/chrome/browser/shared/model/browser/all_web_state_list_observation_registrar.h"
#import "ios/chrome/browser/shared/model/browser/browser.h"
#import "ios/chrome/browser/shared/model/browser/browser_list.h"
#import "ios/chrome/browser/shared/model/browser/browser_list_factory.h"
#import "ios/chrome/browser/shared/model/profile/profile_ios.h"
#import "ios/chrome/browser/shared/model/web_state_list/web_state_list.h"
#import "ios/chrome/browser/translate/model/chrome_ios_translate_client.h"
#import "ios/chrome/browser/translate/model/translate_service_ios.h"
#import "ios/web/public/webui/web_ui_ios.h"
IOSTranslateInternalsHandler::IOSTranslateInternalsHandler() = default;
IOSTranslateInternalsHandler::~IOSTranslateInternalsHandler() = default;
translate::TranslateClient* IOSTranslateInternalsHandler::GetTranslateClient() {
return ChromeIOSTranslateClient::FromWebState(web_ui()->GetWebState());
}
variations::VariationsService*
IOSTranslateInternalsHandler::GetVariationsService() {
return GetApplicationContext()->GetVariationsService();
}
void IOSTranslateInternalsHandler::RegisterMessageCallback(
std::string_view message,
MessageCallback callback) {
web_ui()->RegisterMessageCallback(message, std::move(callback));
}
void IOSTranslateInternalsHandler::CallJavascriptFunction(
std::string_view function_name,
base::span<const base::ValueView> args) {
web_ui()->CallJavascriptFunction(function_name, args);
}
void IOSTranslateInternalsHandler::RegisterMessages() {
web::BrowserState* browser_state = web_ui()->GetWebState()->GetBrowserState();
ChromeBrowserState* chrome_browser_state =
ChromeBrowserState::FromBrowserState(browser_state)
->GetOriginalChromeBrowserState();
BrowserList* browser_list =
BrowserListFactory::GetForBrowserState(chrome_browser_state);
const BrowserList::BrowserType browser_types =
chrome_browser_state->IsOffTheRecord()
? BrowserList::BrowserType::kIncognito
: BrowserList::BrowserType::kRegularAndInactive;
std::set<Browser*> browsers = browser_list->BrowsersOfType(browser_types);
for (Browser* browser : browsers) {
WebStateList* web_state_list = browser->GetWebStateList();
for (int i = 0; i < web_state_list->count(); i++) {
AddLanguageDetectionObserverForWebState(web_state_list->GetWebStateAt(i));
}
}
AllWebStateListObservationRegistrar::Mode mode =
chrome_browser_state->IsOffTheRecord()
? AllWebStateListObservationRegistrar::Mode::INCOGNITO
: AllWebStateListObservationRegistrar::Mode::REGULAR;
registrar_ = std::make_unique<AllWebStateListObservationRegistrar>(
browser_list, std::make_unique<Observer>(this), mode);
RegisterMessageCallbacks();
}
void IOSTranslateInternalsHandler::OnLanguageDetermined(
const translate::LanguageDetectionDetails& details) {
if (web_ui()->GetWebState()->GetBrowserState()->IsOffTheRecord() ||
!GetTranslateClient()->IsTranslatableURL(details.url)) {
return;
}
AddLanguageDetectionDetails(details);
}
void IOSTranslateInternalsHandler::IOSLanguageDetectionTabHelperWasDestroyed(
language::IOSLanguageDetectionTabHelper* tab_helper) {
// No-op. The IOSLanguageDetectionTabHelper is stopped being observed in
// WebStateListObserver callbacks.
}
void IOSTranslateInternalsHandler::AddLanguageDetectionObserverForWebState(
web::WebState* web_state) {
language::IOSLanguageDetectionTabHelper* tab_helper =
language::IOSLanguageDetectionTabHelper::FromWebState(web_state);
if (!scoped_tab_helper_observations_.IsObservingSource(tab_helper)) {
scoped_tab_helper_observations_.AddObservation(tab_helper);
}
}
void IOSTranslateInternalsHandler::RemoveLanguageDetectionObserverForWebState(
web::WebState* web_state) {
language::IOSLanguageDetectionTabHelper* tab_helper =
language::IOSLanguageDetectionTabHelper::FromWebState(web_state);
scoped_tab_helper_observations_.RemoveObservation(tab_helper);
}
IOSTranslateInternalsHandler::Observer::Observer(
IOSTranslateInternalsHandler* handler)
: handler_(handler) {}
IOSTranslateInternalsHandler::Observer::~Observer() {}
#pragma mark - WebStateListObserver
void IOSTranslateInternalsHandler::Observer::WebStateListDidChange(
WebStateList* web_state_list,
const WebStateListChange& change,
const WebStateListStatus& status) {
switch (change.type()) {
case WebStateListChange::Type::kStatusOnly:
// Do nothing when a WebState is selected and its status is updated.
break;
case WebStateListChange::Type::kDetach: {
const WebStateListChangeDetach& detach_change =
change.As<WebStateListChangeDetach>();
handler_->RemoveLanguageDetectionObserverForWebState(
detach_change.detached_web_state());
break;
}
case WebStateListChange::Type::kMove:
// Do nothing when a WebState is moved.
break;
case WebStateListChange::Type::kReplace: {
const WebStateListChangeReplace& replace_change =
change.As<WebStateListChangeReplace>();
handler_->RemoveLanguageDetectionObserverForWebState(
replace_change.replaced_web_state());
handler_->AddLanguageDetectionObserverForWebState(
replace_change.inserted_web_state());
break;
}
case WebStateListChange::Type::kInsert: {
const WebStateListChangeInsert& insert_change =
change.As<WebStateListChangeInsert>();
handler_->AddLanguageDetectionObserverForWebState(
insert_change.inserted_web_state());
break;
}
case WebStateListChange::Type::kGroupCreate:
// Do nothing when a group is created.
break;
case WebStateListChange::Type::kGroupVisualDataUpdate:
// Do nothing when a tab group's visual data are updated.
break;
case WebStateListChange::Type::kGroupMove:
// Do nothing when a tab group is moved.
break;
case WebStateListChange::Type::kGroupDelete:
// Do nothing when a group is deleted.
break;
}
}