File indexing completed on 2024-04-28 11:48:59

 /*  This file is part of the KDE libraries
 
     SPDX-FileCopyrightText: 2009 Jakub Stachowski <qbast@go2.pl>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include <QString>
 
 #include "guesslanguage.h"
 #include "languagefilter_p.h"
 #include "loader_p.h"
 #include "settingsimpl_p.h"
 #include "speller.h"
 
 namespace Sonnet
 {
 #define MIN_RELIABILITY 0.1
 #define MAX_ITEMS 5
 
 class LanguageFilterPrivate
 {
 public:
     LanguageFilterPrivate(AbstractTokenizer *s)
         : source(s)
     {
         gl.setLimits(MAX_ITEMS, MIN_RELIABILITY);
     }
 
     ~LanguageFilterPrivate()
     {
         delete source;
     }
 
     QString mainLanguage() const;
 
     AbstractTokenizer *source = nullptr;
     Token lastToken;
 
     mutable QString lastLanguage;
     mutable QString cachedMainLanguage;
     QString prevLanguage;
 
     GuessLanguage gl;
     Speller sp;
 };
 
 QString LanguageFilterPrivate::mainLanguage() const
 {
     if (cachedMainLanguage.isNull()) {
         cachedMainLanguage = gl.identify(source->buffer(), QStringList(Loader::openLoader()->settings()->defaultLanguage()));
     }
     return cachedMainLanguage;
 }
 
 /* -----------------------------------------------------------------*/
 
 LanguageFilter::LanguageFilter(AbstractTokenizer *source)
     : d(new LanguageFilterPrivate(source))
 {
     d->prevLanguage = Loader::openLoader()->settings()->defaultLanguage();
 }
 
 LanguageFilter::LanguageFilter(const LanguageFilter &other)
     : d(new LanguageFilterPrivate(other.d->source))
 {
     d->lastToken = other.d->lastToken;
     d->lastLanguage = other.d->lastLanguage;
     d->cachedMainLanguage = other.d->cachedMainLanguage;
     d->prevLanguage = other.d->prevLanguage;
 }
 
 LanguageFilter::~LanguageFilter()
 {
     delete d;
 }
 
 bool LanguageFilter::hasNext() const
 {
     return d->source->hasNext();
 }
 
 void LanguageFilter::setBuffer(const QString &buffer)
 {
     d->cachedMainLanguage = QString();
     d->source->setBuffer(buffer);
 }
 
 Token LanguageFilter::next()
 {
     d->lastToken = d->source->next();
     d->prevLanguage = d->lastLanguage;
     d->lastLanguage = QString();
     return d->lastToken;
 }
 
 QString LanguageFilter::language() const
 {
     if (d->lastLanguage.isNull()) {
         d->lastLanguage = d->gl.identify(d->lastToken.toString(), QStringList() << d->prevLanguage << Loader::openLoader()->settings()->defaultLanguage());
     }
     const QStringList available = d->sp.availableLanguages();
 
     // FIXME: do something a little more smart here
     if (!available.contains(d->lastLanguage)) {
         for (const QString &lang : available) {
             if (lang.startsWith(d->lastLanguage)) {
                 d->lastLanguage = lang;
                 break;
             }
         }
     }
 
     return d->lastLanguage;
 }
 
 bool LanguageFilter::isSpellcheckable() const
 {
     const QString &lastlang = language();
     if (lastlang.isEmpty()) {
         return false;
     }
 
     if (d->sp.availableLanguages().contains(lastlang)) {
         return true;
     }
 
     return false;
 }
 
 QString LanguageFilter::buffer() const
 {
     return d->source->buffer();
 }
 
 void LanguageFilter::replace(int position, int len, const QString &newWord)
 {
     d->source->replace(position, len, newWord);
     // FIXME: fix lastToken
     // uncache language for current token - it may have changed
     d->lastLanguage = QString();
 }
 }