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/*
* Copyright (C) 2012 Igalia S.L.
* Copyright (C) 2012 Samsung Electronics
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "TextCheckerEnchant.h"
#if ENABLE(SPELLCHECK)
#include <unicode/ubrk.h>
#include <wtf/Language.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/text/CString.h>
#include <wtf/text/TextBreakIterator.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
TextCheckerEnchant& TextCheckerEnchant::singleton()
{
static NeverDestroyed<TextCheckerEnchant> textChecker;
return textChecker;
}
void TextCheckerEnchant::EnchantDictDeleter::operator()(EnchantDict* dictionary) const
{
enchant_broker_free_dict(TextCheckerEnchant::singleton().m_broker, dictionary);
}
TextCheckerEnchant::TextCheckerEnchant()
: m_broker(enchant_broker_init())
{
}
void TextCheckerEnchant::ignoreWord(const String& word)
{
auto utf8Word = word.utf8();
for (auto& dictionary : m_enchantDictionaries)
enchant_dict_add_to_session(dictionary.get(), utf8Word.data(), utf8Word.length());
}
void TextCheckerEnchant::learnWord(const String& word)
{
auto utf8Word = word.utf8();
for (auto& dictionary : m_enchantDictionaries)
enchant_dict_add(dictionary.get(), utf8Word.data(), utf8Word.length());
}
void TextCheckerEnchant::checkSpellingOfWord(const String& word, int start, int end, int& misspellingLocation, int& misspellingLength)
{
CString string = word.substring(start, end - start).utf8();
for (auto& dictionary : m_enchantDictionaries) {
if (!enchant_dict_check(dictionary.get(), string.data(), string.length())) {
// Stop checking, this word is ok in at least one dict.
misspellingLocation = -1;
misspellingLength = 0;
return;
}
}
misspellingLocation = start;
misspellingLength = end - start;
}
void TextCheckerEnchant::checkSpellingOfString(const String& string, int& misspellingLocation, int& misspellingLength)
{
// Assume that the words in the string are spelled correctly.
misspellingLocation = -1;
misspellingLength = 0;
if (!hasDictionary())
return;
UBreakIterator* iter = wordBreakIterator(string);
if (!iter)
return;
int start = ubrk_first(iter);
for (int end = ubrk_next(iter); end != UBRK_DONE; end = ubrk_next(iter)) {
if (isWordTextBreak(iter)) {
checkSpellingOfWord(string, start, end, misspellingLocation, misspellingLength);
// Stop checking the next words If the current word is misspelled, to do not overwrite its misspelled location and length.
if (misspellingLength)
return;
}
start = end;
}
}
Vector<String> TextCheckerEnchant::getGuessesForWord(const String& word)
{
if (!hasDictionary())
return { };
static const size_t maximumNumberOfSuggestions = 10;
Vector<String> guesses;
auto utf8Word = word.utf8();
for (auto& dictionary : m_enchantDictionaries) {
size_t numberOfSuggestions;
size_t i;
char** suggestions = enchant_dict_suggest(dictionary.get(), utf8Word.data(), utf8Word.length(), &numberOfSuggestions);
if (numberOfSuggestions <= 0)
continue;
if (numberOfSuggestions > maximumNumberOfSuggestions)
numberOfSuggestions = maximumNumberOfSuggestions;
for (i = 0; i < numberOfSuggestions; i++)
guesses.append(String::fromUTF8(suggestions[i]));
enchant_dict_free_string_list(dictionary.get(), suggestions);
}
return guesses;
}
void TextCheckerEnchant::updateSpellCheckingLanguages(const Vector<String>& languages)
{
Vector<UniqueEnchantDict> spellDictionaries;
if (!languages.isEmpty()) {
for (auto& language : languages) {
CString currentLanguage = language.utf8();
if (enchant_broker_dict_exists(m_broker, currentLanguage.data())) {
if (auto* dict = enchant_broker_request_dict(m_broker, currentLanguage.data()))
spellDictionaries.append(dict);
}
}
} else {
// Languages are not specified by user, try to get default language.
CString language = defaultLanguage().utf8();
if (enchant_broker_dict_exists(m_broker, language.data())) {
if (auto* dict = enchant_broker_request_dict(m_broker, language.data()))
spellDictionaries.append(dict);
} else {
// No dictionaries selected, we get the first one from the list.
CString dictLanguage;
enchant_broker_list_dicts(m_broker, [](const char* const languageTag, const char* const, const char* const, const char* const, void* data) {
auto* dictLanguage = static_cast<CString*>(data);
if (dictLanguage->isNull())
*dictLanguage = languageTag;
}, &dictLanguage);
if (!dictLanguage.isNull()) {
if (auto* dict = enchant_broker_request_dict(m_broker, dictLanguage.data()))
spellDictionaries.append(dict);
}
}
}
m_enchantDictionaries = WTFMove(spellDictionaries);
}
Vector<String> TextCheckerEnchant::loadedSpellCheckingLanguages() const
{
if (!hasDictionary())
return { };
Vector<String> languages;
for (auto& dictionary : m_enchantDictionaries) {
enchant_dict_describe(dictionary.get(), [](const char* const languageTag, const char* const, const char* const, const char* const, void* data) {
auto* languages = static_cast<Vector<String>*>(data);
languages->append(String::fromUTF8(languageTag));
}, &languages);
}
return languages;
}
Vector<String> TextCheckerEnchant::availableSpellCheckingLanguages() const
{
Vector<String> languages;
enchant_broker_list_dicts(m_broker, [](const char* const languageTag, const char* const, const char* const, const char* const, void* data) {
auto* languages = static_cast<Vector<String>*>(data);
languages->append(String::fromUTF8(languageTag));
}, &languages);
return languages;
}
} // namespace WebCore
#endif // ENABLE(SPELLCHECK)
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