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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "codecchooser.h"
#include <utils/algorithm.h>
#include <QTextCodec>
static bool isSingleByte(int mib)
{
// Encodings are listed at https://www.iana.org/assignments/character-sets/character-sets.xhtml
return (mib >= 0 && mib <= 16)
|| (mib >= 81 && mib <= 85)
|| (mib >= 109 && mib <= 112)
|| (mib >= 2000 && mib <= 2024)
|| (mib >= 2028 && mib <= 2100)
|| (mib >= 2106);
}
namespace TextEditor {
CodecChooser::CodecChooser(Filter filter)
{
QList<int> mibs = Utils::sorted(QTextCodec::availableMibs());
QList<int>::iterator firstNonNegative =
std::find_if(mibs.begin(), mibs.end(), [](int n) { return n >=0; });
if (firstNonNegative != mibs.end())
std::rotate(mibs.begin(), firstNonNegative, mibs.end());
for (int mib : std::as_const(mibs)) {
if (filter == Filter::SingleByte && !isSingleByte(mib))
continue;
if (QTextCodec *codec = QTextCodec::codecForMib(mib)) {
QString compoundName = QLatin1String(codec->name());
const QList<QByteArray> aliases = codec->aliases();
for (const QByteArray &alias : aliases) {
compoundName += QLatin1String(" / ");
compoundName += QString::fromLatin1(alias);
}
addItem(compoundName);
m_codecs.append(codec);
}
}
connect(this, &QComboBox::currentIndexChanged,
this, [this](int index) { emit codecChanged(m_codecs.at(index)); });
}
void CodecChooser::prependNone()
{
insertItem(0, "None");
m_codecs.prepend(nullptr);
}
QTextCodec *CodecChooser::currentCodec() const
{
return codecAt(currentIndex());
}
QTextCodec *CodecChooser::codecAt(int index) const
{
if (index < 0)
index = 0;
return m_codecs[index];
}
void CodecChooser::setAssignedCodec(QTextCodec *codec, const QString &name)
{
int rememberedSystemPosition = -1;
for (int i = 0, total = m_codecs.size(); i < total; ++i) {
if (codec != m_codecs.at(i))
continue;
if (name.isEmpty() || itemText(i) == name) {
setCurrentIndex(i);
return;
}
// we've got System matching encoding - but have explicitly set the codec
rememberedSystemPosition = i;
}
if (rememberedSystemPosition != -1)
setCurrentIndex(rememberedSystemPosition);
}
QByteArray CodecChooser::assignedCodecName() const
{
const int index = currentIndex();
return index == 0
? QByteArray("System") // we prepend System to the available codecs
: m_codecs.at(index)->name();
}
} // TextEditor
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