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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "codecselector.h"
#include "../coreplugintr.h"
#include "../textdocument.h"
#include <utils/algorithm.h>
#include <utils/filepath.h>
#include <utils/itemviews.h>
#include <QDebug>
#include <QTextCodec>
#include <QPushButton>
#include <QScrollBar>
#include <QVBoxLayout>
namespace Core {
/* custom class to make sure the width is wide enough for the
* contents. Should be easier with Qt. */
class CodecListWidget : public Utils::ListWidget
{
public:
CodecListWidget(QWidget *parent) : Utils::ListWidget(parent){}
QSize sizeHint() const override {
return QListWidget::sizeHint().expandedTo(
QSize(sizeHintForColumn(0) + verticalScrollBar()->sizeHint().width() + 4, 0));
}
};
CodecSelector::CodecSelector(QWidget *parent, Core::BaseTextDocument *doc)
: QDialog(parent)
{
m_hasDecodingError = doc->hasDecodingError();
m_isModified = doc->isModified();
QByteArray buf;
if (m_hasDecodingError)
buf = doc->decodingErrorSample();
setWindowTitle(Tr::tr("Text Encoding"));
m_label = new QLabel(this);
QString decodingErrorHint;
if (m_hasDecodingError)
decodingErrorHint = '\n' + Tr::tr("The following encodings are likely to fit:");
m_label->setText(Tr::tr("Select encoding for \"%1\".%2")
.arg(doc->filePath().fileName())
.arg(decodingErrorHint));
m_listWidget = new CodecListWidget(this);
m_listWidget->setActivationMode(Utils::DoubleClickActivation);
QStringList encodings;
const QList<int> mibs = Utils::sorted(QTextCodec::availableMibs());
QList<int> sortedMibs;
for (const int mib : mibs)
if (mib >= 0)
sortedMibs += mib;
for (const int mib : mibs)
if (mib < 0)
sortedMibs += mib;
int currentIndex = -1;
for (const int mib : std::as_const(sortedMibs)) {
QTextCodec *c = QTextCodec::codecForMib(mib);
if (!doc->supportsCodec(c))
continue;
if (!buf.isEmpty()) {
// slow, should use a feature from QTextCodec or QTextDecoder (but those are broken currently)
QByteArray verifyBuf = c->fromUnicode(c->toUnicode(buf));
// the minSize trick lets us ignore unicode headers
int minSize = qMin(verifyBuf.size(), buf.size());
if (minSize < buf.size() - 4
|| memcmp(verifyBuf.constData() + verifyBuf.size() - minSize,
buf.constData() + buf.size() - minSize, minSize))
continue;
}
QString names = QString::fromLatin1(c->name());
const QList<QByteArray> aliases = c->aliases();
for (const QByteArray &alias : aliases)
names += QLatin1String(" / ") + QString::fromLatin1(alias);
if (doc->codec() == c)
currentIndex = encodings.count();
encodings << names;
}
m_listWidget->addItems(encodings);
if (currentIndex >= 0)
m_listWidget->setCurrentRow(currentIndex);
connect(m_listWidget, &QListWidget::itemSelectionChanged, this, &CodecSelector::updateButtons);
m_dialogButtonBox = new QDialogButtonBox(this);
m_reloadButton = m_dialogButtonBox->addButton(Tr::tr("Reload with Encoding"), QDialogButtonBox::DestructiveRole);
m_saveButton = m_dialogButtonBox->addButton(Tr::tr("Save with Encoding"), QDialogButtonBox::DestructiveRole);
m_dialogButtonBox->addButton(QDialogButtonBox::Cancel);
connect(m_dialogButtonBox, &QDialogButtonBox::clicked, this, &CodecSelector::buttonClicked);
connect(m_listWidget, &QAbstractItemView::activated, m_reloadButton, &QAbstractButton::click);
auto vbox = new QVBoxLayout(this);
vbox->addWidget(m_label);
vbox->addWidget(m_listWidget);
vbox->addWidget(m_dialogButtonBox);
updateButtons();
}
CodecSelector::~CodecSelector() = default;
void CodecSelector::updateButtons()
{
bool hasCodec = (selectedCodec() != nullptr);
m_reloadButton->setEnabled(!m_isModified && hasCodec);
m_saveButton->setEnabled(!m_hasDecodingError && hasCodec);
}
QTextCodec *CodecSelector::selectedCodec() const
{
if (QListWidgetItem *item = m_listWidget->currentItem()) {
if (!item->isSelected())
return nullptr;
QString codecName = item->text();
if (codecName.contains(QLatin1String(" / ")))
codecName = codecName.left(codecName.indexOf(QLatin1String(" / ")));
return QTextCodec::codecForName(codecName.toLatin1());
}
return nullptr;
}
void CodecSelector::buttonClicked(QAbstractButton *button)
{
Result result = Cancel;
if (button == m_reloadButton)
result = Reload;
if (button == m_saveButton)
result = Save;
done(result);
}
} // namespace Core
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