Sonnet

languagefilter.cpp
1/* This file is part of the KDE libraries
2
3 SPDX-FileCopyrightText: 2009 Jakub Stachowski <qbast@go2.pl>
4
5 SPDX-License-Identifier: LGPL-2.0-or-later
6*/
7
8#include <QString>
9
10#include "guesslanguage.h"
11#include "languagefilter_p.h"
12#include "loader_p.h"
13#include "settingsimpl_p.h"
14#include "speller.h"
15
16namespace Sonnet
17{
18#define MIN_RELIABILITY 0.1
19#define MAX_ITEMS 5
20
21class LanguageFilterPrivate
22{
23public:
24 LanguageFilterPrivate(AbstractTokenizer *s)
25 : source(s)
26 {
27 gl.setLimits(MAX_ITEMS, MIN_RELIABILITY);
28 }
29
30 ~LanguageFilterPrivate()
31 {
32 delete source;
33 }
34
35 QString mainLanguage() const;
36
37 AbstractTokenizer *source = nullptr;
38 Token lastToken;
39
40 mutable QString lastLanguage;
41 mutable QString cachedMainLanguage;
42 QString prevLanguage;
43
44 GuessLanguage gl;
45 Speller sp;
46};
47
48QString LanguageFilterPrivate::mainLanguage() const
49{
50 if (cachedMainLanguage.isNull()) {
51 cachedMainLanguage = gl.identify(source->buffer(), QStringList(Loader::openLoader()->settings()->defaultLanguage()));
52 }
53 return cachedMainLanguage;
54}
55
56/* -----------------------------------------------------------------*/
57
58LanguageFilter::LanguageFilter(AbstractTokenizer *source)
59 : d(new LanguageFilterPrivate(source))
60{
61 d->prevLanguage = Loader::openLoader()->settings()->defaultLanguage();
62}
63
64LanguageFilter::LanguageFilter(const LanguageFilter &other)
65 : d(new LanguageFilterPrivate(other.d->source))
66{
67 d->lastToken = other.d->lastToken;
68 d->lastLanguage = other.d->lastLanguage;
69 d->cachedMainLanguage = other.d->cachedMainLanguage;
70 d->prevLanguage = other.d->prevLanguage;
71}
72
73LanguageFilter::~LanguageFilter() = default;
74
75bool LanguageFilter::hasNext() const
76{
77 return d->source->hasNext();
78}
79
80void LanguageFilter::setBuffer(const QString &buffer)
81{
82 d->cachedMainLanguage = QString();
83 d->source->setBuffer(buffer);
84}
85
86Token LanguageFilter::next()
87{
88 d->lastToken = d->source->next();
89 d->prevLanguage = d->lastLanguage;
90 d->lastLanguage = QString();
91 return d->lastToken;
92}
93
94QString LanguageFilter::language() const
95{
96 if (d->lastLanguage.isNull()) {
97 d->lastLanguage = d->gl.identify(d->lastToken.toString(), QStringList() << d->prevLanguage << Loader::openLoader()->settings()->defaultLanguage());
98 }
99 const QStringList available = d->sp.availableLanguages();
100
101 // FIXME: do something a little more smart here
102 if (!available.contains(d->lastLanguage)) {
103 for (const QString &lang : available) {
104 if (lang.startsWith(d->lastLanguage)) {
105 d->lastLanguage = lang;
106 break;
107 }
108 }
109 }
110
111 return d->lastLanguage;
112}
113
114bool LanguageFilter::isSpellcheckable() const
115{
116 const QString &lastlang = language();
117 if (lastlang.isEmpty()) {
118 return false;
119 }
120
121 if (d->sp.availableLanguages().contains(lastlang)) {
122 return true;
123 }
124
125 return false;
126}
127
128QString LanguageFilter::buffer() const
129{
130 return d->source->buffer();
131}
132
133void LanguageFilter::replace(int position, int len, const QString &newWord)
134{
135 d->source->replace(position, len, newWord);
136 // FIXME: fix lastToken
137 // uncache language for current token - it may have changed
138 d->lastLanguage = QString();
139}
140}
QString identify(const QString &text, const QStringList &suggestions=QStringList()) const
Returns the 2 digit ISO 639-1 code for the language of the currently set text and.
void setLimits(int maxItems, double minConfidence)
Sets limits to number of languages returned by identify().
The sonnet namespace.
bool isEmpty() const const
bool isNull() const const
QString & replace(QChar before, QChar after, Qt::CaseSensitivity cs)
bool contains(QLatin1StringView str, Qt::CaseSensitivity cs) const const
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