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// Copyright (c) 2010 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/translate/translate_prefs.h"
#include "base/string_util.h"
#include "chrome/browser/pref_service.h"
#include "chrome/browser/scoped_pref_update.h"
const wchar_t TranslatePrefs::kPrefTranslateLanguageBlacklist[] =
L"translate_language_blacklist";
const wchar_t TranslatePrefs::kPrefTranslateSiteBlacklist[] =
L"translate_site_blacklist";
const wchar_t TranslatePrefs::kPrefTranslateWhitelists[] =
L"translate_whitelists";
// TranslatePrefs: public: -----------------------------------------------------
TranslatePrefs::TranslatePrefs(PrefService* user_prefs)
: prefs_(user_prefs) {
}
bool TranslatePrefs::IsLanguageBlacklisted(
const std::string& original_language) {
return IsValueBlacklisted(kPrefTranslateLanguageBlacklist, original_language);
}
void TranslatePrefs::BlacklistLanguage(const std::string& original_language) {
ScopedPrefUpdate update(prefs_, kPrefTranslateLanguageBlacklist);
BlacklistValue(kPrefTranslateLanguageBlacklist, original_language);
}
void TranslatePrefs::RemoveLanguageFromBlacklist(
const std::string& original_language) {
ScopedPrefUpdate update(prefs_, kPrefTranslateLanguageBlacklist);
RemoveValueFromBlacklist(kPrefTranslateLanguageBlacklist, original_language);
}
bool TranslatePrefs::IsSiteBlacklisted(const std::string& site) {
return IsValueBlacklisted(kPrefTranslateSiteBlacklist, site);
}
void TranslatePrefs::BlacklistSite(const std::string& site) {
ScopedPrefUpdate update(prefs_, kPrefTranslateSiteBlacklist);
BlacklistValue(kPrefTranslateSiteBlacklist, site);
}
void TranslatePrefs::RemoveSiteFromBlacklist(const std::string& site) {
ScopedPrefUpdate update(prefs_, kPrefTranslateSiteBlacklist);
RemoveValueFromBlacklist(kPrefTranslateSiteBlacklist, site);
}
bool TranslatePrefs::IsLanguagePairWhitelisted(
const std::string& original_language,
const std::string& target_language) {
const DictionaryValue* dict = prefs_->GetDictionary(kPrefTranslateWhitelists);
if (dict && !dict->empty()) {
std::string auto_target_lang;
if (dict->GetString(ASCIIToWide(original_language), &auto_target_lang) &&
auto_target_lang == target_language)
return true;
}
return false;
}
void TranslatePrefs::WhitelistLanguagePair(
const std::string& original_language,
const std::string& target_language) {
DictionaryValue* dict = prefs_->GetMutableDictionary(
kPrefTranslateWhitelists);
if (!dict) {
NOTREACHED() << "Unregistered translate whitelist pref";
return;
}
ScopedPrefUpdate update(prefs_, kPrefTranslateWhitelists);
dict->SetString(ASCIIToWide(original_language), target_language);
prefs_->ScheduleSavePersistentPrefs();
}
void TranslatePrefs::RemoveLanguagePairFromWhitelist(
const std::string& original_language,
const std::string& target_language) {
DictionaryValue* dict = prefs_->GetMutableDictionary(
kPrefTranslateWhitelists);
if (!dict) {
NOTREACHED() << "Unregistered translate whitelist pref";
return;
}
ScopedPrefUpdate update(prefs_, kPrefTranslateWhitelists);
if (dict->Remove(ASCIIToWide(original_language), NULL))
prefs_->ScheduleSavePersistentPrefs();
}
// TranslatePrefs: public, static: ---------------------------------------------
bool TranslatePrefs::CanTranslate(PrefService* user_prefs,
const std::string& original_language, const GURL& url) {
TranslatePrefs prefs(user_prefs);
if (prefs.IsSiteBlacklisted(url.HostNoBrackets()))
return false;
return (!prefs.IsLanguageBlacklisted(original_language));
}
bool TranslatePrefs::ShouldAutoTranslate(PrefService* user_prefs,
const std::string& original_language, std::string* target_language) {
TranslatePrefs prefs(user_prefs);
return prefs.IsLanguageWhitelisted(original_language, target_language);
}
void TranslatePrefs::RegisterUserPrefs(PrefService* user_prefs) {
if (!user_prefs->FindPreference(kPrefTranslateLanguageBlacklist))
user_prefs->RegisterListPref(kPrefTranslateLanguageBlacklist);
if (!user_prefs->FindPreference(kPrefTranslateSiteBlacklist))
user_prefs->RegisterListPref(kPrefTranslateSiteBlacklist);
if (!user_prefs->FindPreference(kPrefTranslateWhitelists)) {
user_prefs->RegisterDictionaryPref(kPrefTranslateWhitelists);
MigrateTranslateWhitelists(user_prefs);
}
}
// TranslatePrefs: private, static: --------------------------------------------
void TranslatePrefs::MigrateTranslateWhitelists(PrefService* user_prefs) {
// Old format of kPrefTranslateWhitelists
// - original language -> list of target langs to auto-translate
// - list of langs is in order of being enabled i.e. last in list is the
// most recent language that user enabled via
// Always translate |source_lang| to |target_lang|"
// - this results in a one-to-n relationship between source lang and target
// langs.
// New format:
// - original language -> one target language to auto-translate
// - each time that the user enables the "Always translate..." option, that
// target lang overwrites the previous one.
// - this results in a one-to-one relationship between source lang and target
// lang
// - we replace old list of target langs with the last target lang in list,
// assuming the last (i.e. most recent) target lang is what user wants to
// keep auto-translated.
DictionaryValue* dict = user_prefs->GetMutableDictionary(
kPrefTranslateWhitelists);
if (!dict || dict->empty())
return;
bool save_prefs = false;
for (DictionaryValue::key_iterator iter(dict->begin_keys());
iter != dict->end_keys(); ++iter) {
ListValue* list = NULL;
if (!dict->GetList(*iter, &list) || !list)
break; // Dictionary has either been migrated or new format.
save_prefs = true;
std::string target_lang;
if (list->empty() || !list->GetString(list->GetSize() - 1, &target_lang) ||
target_lang.empty())
dict->Remove(*iter, NULL);
else
dict->SetString(*iter, target_lang);
}
if (!save_prefs)
return;
ScopedPrefUpdate update(user_prefs, kPrefTranslateWhitelists);
user_prefs->ScheduleSavePersistentPrefs();
}
// TranslatePrefs: private: ----------------------------------------------------
bool TranslatePrefs::IsValueInList(const ListValue* list,
const std::string& in_value) {
for (size_t i = 0; i < list->GetSize(); ++i) {
std::string value;
if (list->GetString(i, &value) && value == in_value)
return true;
}
return false;
}
bool TranslatePrefs::IsValueBlacklisted(const wchar_t* pref_id,
const std::string& value) {
const ListValue* blacklist = prefs_->GetList(pref_id);
return (blacklist && !blacklist->empty() && IsValueInList(blacklist, value));
}
void TranslatePrefs::BlacklistValue(const wchar_t* pref_id,
const std::string& value) {
ListValue* blacklist = prefs_->GetMutableList(pref_id);
if (!blacklist) {
NOTREACHED() << "Unregistered translate blacklist pref";
return;
}
blacklist->Append(new StringValue(value));
prefs_->ScheduleSavePersistentPrefs();
}
void TranslatePrefs::RemoveValueFromBlacklist(const wchar_t* pref_id,
const std::string& value) {
ListValue* blacklist = prefs_->GetMutableList(pref_id);
if (!blacklist) {
NOTREACHED() << "Unregistered translate blacklist pref";
return;
}
StringValue string_value(value);
if (blacklist->Remove(string_value) != -1)
prefs_->ScheduleSavePersistentPrefs();
}
bool TranslatePrefs::IsLanguageWhitelisted(
const std::string& original_language, std::string* target_language) {
const DictionaryValue* dict = prefs_->GetDictionary(kPrefTranslateWhitelists);
if (dict &&
dict->GetString(ASCIIToWide(original_language), target_language)) {
DCHECK(!target_language->empty());
return !target_language->empty();
}
return false;
}
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