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// Copyright 2022 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/translate/partial_translate_bubble_model_impl.h"
#include <string>
#include <utility>
#include "base/metrics/histogram_functions.h"
#include "base/metrics/metrics_hashes.h"
#include "base/time/time.h"
#include "chrome/browser/translate/chrome_translate_client.h"
#include "chrome/browser/ui/translate/partial_translate_bubble_model.h"
#include "components/language_detection/core/constants.h"
#include "components/translate/content/browser/partial_translate_manager.h"
#include "components/translate/core/browser/translate_manager.h"
#include "components/translate/core/browser/translate_ui_languages_manager.h"
#include "components/translate/core/common/translate_errors.h"
namespace {
const char kTranslatePartialTranslationSourceLanguage[] =
"Translate.PartialTranslation.SourceLanguage";
const char kTranslatePartialTranslationTargetLanguage[] =
"Translate.PartialTranslation.TargetLanguage";
const char kTranslatePartialTranslationResponseTime[] =
"Translate.PartialTranslation.ResponseTime";
const char kTranslatePartialTranslationTranslationStatus[] =
"Translate.PartialTranslation.TranslationStatus";
const char kTranslatePartialTranslationTranslatedCharacterCount[] =
"Translate.PartialTranslation.Translated.CharacterCount";
} // namespace
PartialTranslateBubbleModelImpl::PartialTranslateBubbleModelImpl(
ViewState view_state,
translate::TranslateErrors error_type,
const std::u16string& source_text,
const std::u16string& target_text,
std::unique_ptr<PartialTranslateManager> partial_translate_manager,
std::unique_ptr<translate::TranslateUILanguagesManager>
ui_languages_manager)
: current_view_state_(view_state),
error_type_(error_type),
source_text_(source_text),
target_text_(target_text),
partial_translate_manager_(std::move(partial_translate_manager)),
ui_languages_manager_(std::move(ui_languages_manager)) {
DCHECK_NE(VIEW_STATE_SOURCE_LANGUAGE, view_state);
DCHECK_NE(VIEW_STATE_TARGET_LANGUAGE, view_state);
}
PartialTranslateBubbleModelImpl::~PartialTranslateBubbleModelImpl() = default;
void PartialTranslateBubbleModelImpl::AddObserver(
PartialTranslateBubbleModel::Observer* obs) {
observers_.AddObserver(obs);
}
void PartialTranslateBubbleModelImpl::RemoveObserver(
PartialTranslateBubbleModel::Observer* obs) {
observers_.RemoveObserver(obs);
}
PartialTranslateBubbleModelImpl::ViewState
PartialTranslateBubbleModelImpl::GetViewState() const {
return current_view_state_;
}
void PartialTranslateBubbleModelImpl::SetViewState(
PartialTranslateBubbleModelImpl::ViewState view_state) {
current_view_state_ = view_state;
}
void PartialTranslateBubbleModelImpl::SetSourceLanguage(
const std::string& language_code) {
ui_languages_manager_->UpdateSourceLanguage(language_code);
}
void PartialTranslateBubbleModelImpl::SetTargetLanguage(
const std::string& language_code) {
ui_languages_manager_->UpdateTargetLanguage(language_code);
}
void PartialTranslateBubbleModelImpl::SetSourceText(
const std::u16string& text) {
source_text_ = text;
}
std::u16string PartialTranslateBubbleModelImpl::GetSourceText() const {
return source_text_;
}
void PartialTranslateBubbleModelImpl::SetTargetText(
const std::u16string& text) {
// Note: Some languages have syntactic differences in use of ellipses.
// Luxembourgish uses a leading space and is the only one of these languages
// supported by Translate in Chrome. Given this, specific localization is not
// handled, but could be in the future if more languages are included.
if (source_text_truncated_) {
target_text_ = text + u"…";
} else {
target_text_ = text;
}
}
std::u16string PartialTranslateBubbleModelImpl::GetTargetText() const {
return target_text_;
}
void PartialTranslateBubbleModelImpl::SetError(
translate::TranslateErrors error_type) {
error_type_ = error_type;
}
translate::TranslateErrors PartialTranslateBubbleModelImpl::GetError() const {
return error_type_;
}
int PartialTranslateBubbleModelImpl::GetNumberOfSourceLanguages() const {
return ui_languages_manager_->GetNumberOfLanguages();
}
int PartialTranslateBubbleModelImpl::GetNumberOfTargetLanguages() const {
// Subtract 1 to account for unknown language option being omitted.
return ui_languages_manager_->GetNumberOfLanguages() - 1;
}
std::u16string PartialTranslateBubbleModelImpl::GetSourceLanguageNameAt(
int index) const {
return ui_languages_manager_->GetLanguageNameAt(index);
}
std::u16string PartialTranslateBubbleModelImpl::GetTargetLanguageNameAt(
int index) const {
// Add 1 to account for unknown language option at index 0 in
// TranslateUILanguagesManager language list.
return ui_languages_manager_->GetLanguageNameAt(index + 1);
}
int PartialTranslateBubbleModelImpl::GetSourceLanguageIndex() const {
return ui_languages_manager_->GetSourceLanguageIndex();
}
void PartialTranslateBubbleModelImpl::UpdateSourceLanguageIndex(int index) {
ui_languages_manager_->UpdateSourceLanguageIndex(index);
}
int PartialTranslateBubbleModelImpl::GetTargetLanguageIndex() const {
// Subtract 1 to account for unknown language option being omitted from the
// bubble target language list.
return ui_languages_manager_->GetTargetLanguageIndex() - 1;
}
void PartialTranslateBubbleModelImpl::UpdateTargetLanguageIndex(int index) {
// Add 1 to account for unknown language option at index 0 in
// TranslateUILanguagesManager language list.
ui_languages_manager_->UpdateTargetLanguageIndex(index + 1);
}
std::string PartialTranslateBubbleModelImpl::GetSourceLanguageCode() const {
return ui_languages_manager_->GetSourceLanguageCode();
}
std::string PartialTranslateBubbleModelImpl::GetTargetLanguageCode() const {
return ui_languages_manager_->GetTargetLanguageCode();
}
void PartialTranslateBubbleModelImpl::Translate(
content::WebContents* web_contents) {
PartialTranslateRequest request;
// If the selected text was truncated, strip the trailing ellipses before
// sending for translation.
std::u16string source_text = GetSourceText();
if (source_text_truncated_) {
request.selection_text = source_text.substr(0, source_text.size() - 1);
} else {
request.selection_text = source_text;
}
request.selection_encoding = web_contents->GetEncoding();
std::string source_language_code = GetSourceLanguageCode();
if (source_language_code != language_detection::kUnknownLanguageCode) {
// |source_language_code| will be kUnknownLanguageCode if it was initially
// returned by page language detection, or if the user explicitly selects
// "Detected Language" in the language list. In such cases,
// |request.source_language| is left as an "empty" value.
request.source_language = source_language_code;
}
request.target_language = GetTargetLanguageCode();
// If this is the initial Partial Translate request, then the source language
// should be used as a hint for backend language detection.
request.apply_lang_hint = !initial_request_completed_;
translate_request_started_time_ = base::TimeTicks::Now();
RecordHistogramsOnPartialTranslateStart();
translate::TranslateManager* translate_manager =
ChromeTranslateClient::GetManagerFromWebContents(web_contents);
translate_manager->translate_client()
->GetTranslatePrefs()
->SetRecentTargetLanguage(GetTargetLanguageCode());
// Cancels any ongoing requests.
partial_translate_manager_->StartPartialTranslate(
web_contents, request,
base::BindOnce(
&PartialTranslateBubbleModelImpl::OnPartialTranslateResponse,
// |partial_translate_manager_| is owned by Model and will be
// destructed (cancelling the Callback) if Model is.
base::Unretained(this), request));
}
void PartialTranslateBubbleModelImpl::TranslateFullPage(
content::WebContents* web_contents) {
translate::TranslateManager* translate_manager =
ChromeTranslateClient::GetManagerFromWebContents(web_contents);
translate_manager->ShowTranslateUI(GetTargetLanguageCode(), true);
}
void PartialTranslateBubbleModelImpl::SetSourceTextTruncated(
bool is_truncated) {
source_text_truncated_ = is_truncated;
}
void PartialTranslateBubbleModelImpl::OnPartialTranslateResponse(
const PartialTranslateRequest& request,
const PartialTranslateResponse& response) {
translate_response_received_time_ = base::TimeTicks::Now();
bool status_error = (response.status != PartialTranslateStatus::kSuccess);
if (status_error) {
error_type_ = translate::TranslateErrors::TRANSLATION_ERROR;
SetViewState(PartialTranslateBubbleModel::VIEW_STATE_ERROR);
} else {
SetSourceLanguage(response.source_language);
SetTargetLanguage(response.target_language);
SetTargetText(response.translated_text);
SetViewState(PartialTranslateBubbleModel::VIEW_STATE_AFTER_TRANSLATE);
error_type_ = translate::TranslateErrors::NONE;
initial_request_completed_ = true;
}
RecordHistogramsOnPartialTranslateComplete(status_error);
for (PartialTranslateBubbleModel::Observer& obs : observers_) {
obs.OnPartialTranslateComplete();
}
}
void PartialTranslateBubbleModelImpl::
RecordHistogramsOnPartialTranslateStart() {
base::UmaHistogramSparse(kTranslatePartialTranslationSourceLanguage,
base::HashMetricName(GetSourceLanguageCode()));
base::UmaHistogramSparse(kTranslatePartialTranslationTargetLanguage,
base::HashMetricName(GetTargetLanguageCode()));
}
void PartialTranslateBubbleModelImpl::
RecordHistogramsOnPartialTranslateComplete(bool status_error) {
base::UmaHistogramMediumTimes(
kTranslatePartialTranslationResponseTime,
translate_response_received_time_ - translate_request_started_time_);
// All PartialTranslateTranslationStatus enum values >0 represent error
// states. Currently there is only one error value, but this can be split into
// specific error types in the future.
base::UmaHistogramBoolean(kTranslatePartialTranslationTranslationStatus,
status_error);
if (!status_error) {
base::UmaHistogramCounts100000(
kTranslatePartialTranslationTranslatedCharacterCount,
target_text_.length());
}
}
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