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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "encodingdialog.h"
#include "previewform.h"
#include <QAction>
#include <QApplication>
#include <QFileDialog>
#include <QMenuBar>
#include <QMessageBox>
#include <QPlainTextEdit>
#include <QRegularExpression>
#include <QScreen>
#include <QTextStream>
#include <QtCore5Compat/qtextcodec.h>
MainWindow::MainWindow()
{
textEdit = new QPlainTextEdit;
textEdit->setLineWrapMode(QPlainTextEdit::NoWrap);
setCentralWidget(textEdit);
findCodecs();
previewForm = new PreviewForm(this);
previewForm->setCodecList(codecs);
createMenus();
setWindowTitle(tr("Codecs"));
const QRect screenGeometry = screen()->geometry();
resize(screenGeometry.width() / 2, screenGeometry.height() * 2 / 3);
}
void MainWindow::open()
{
const QString fileName = QFileDialog::getOpenFileName(this);
if (fileName.isEmpty())
return;
QFile file(fileName);
if (!file.open(QFile::ReadOnly)) {
QMessageBox::warning(this, tr("Codecs"),
tr("Cannot read file %1:\n%2")
.arg(QDir::toNativeSeparators(fileName),
file.errorString()));
return;
}
const QByteArray data = file.readAll();
previewForm->setWindowTitle(tr("Choose Encoding for %1").arg(QFileInfo(fileName).fileName()));
previewForm->setEncodedData(data);
if (previewForm->exec())
textEdit->setPlainText(previewForm->decodedString());
}
void MainWindow::save()
{
const QAction *action = qobject_cast<const QAction *>(sender());
const QByteArray codecName = action->data().toByteArray();
const QString title = tr("Save As (%1)").arg(QLatin1String(codecName));
QString fileName = QFileDialog::getSaveFileName(this, title);
if (fileName.isEmpty())
return;
QFile file(fileName);
if (!file.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(this, tr("Codecs"),
tr("Cannot write file %1:\n%2")
.arg(QDir::toNativeSeparators(fileName),
file.errorString()));
return;
}
auto codec = QTextCodec::codecForName(codecName.constData());
QByteArray text = codec->fromUnicode(textEdit->toPlainText());
file.write(text);
}
void MainWindow::about()
{
QMessageBox::about(this, tr("About Codecs"),
tr("The <b>Codecs</b> example demonstrates how to read and write "
"files using various encodings."));
}
void MainWindow::aboutToShowSaveAsMenu()
{
const QString currentText = textEdit->toPlainText();
for (QAction *action : std::as_const(saveAsActs)) {
const QByteArray codecName = action->data().toByteArray();
const auto codec = QTextCodec::codecForName(codecName);
action->setVisible(codec && codec->canEncode(currentText));
}
}
void MainWindow::findCodecs()
{
QMap<QString, QTextCodec *> codecMap;
QRegularExpression iso8859RegExp("^ISO[- ]8859-([0-9]+).*$");
QRegularExpressionMatch match;
const QList<int> mibs = QTextCodec::availableMibs();
for (int mib : mibs) {
auto codec = QTextCodec::codecForMib(mib);
QString sortKey = codec->name().toUpper();
char rank;
if (sortKey.startsWith(QLatin1String("UTF-8"))) {
rank = 1;
} else if (sortKey.startsWith(QLatin1String("UTF-16"))) {
rank = 2;
} else if ((match = iso8859RegExp.match(sortKey)).hasMatch()) {
if (match.capturedView(1).size() == 1)
rank = 3;
else
rank = 4;
} else {
rank = 5;
}
sortKey.prepend(QLatin1Char('0' + rank));
codecMap.insert(sortKey, codec);
}
for (const auto &codec : std::as_const(codecMap))
codecs += codec;
}
void MainWindow::createMenus()
{
QMenu *fileMenu = menuBar()->addMenu(tr("&File"));
QAction *openAct =
fileMenu->addAction(tr("&Open..."), this, &MainWindow::open);
openAct->setShortcuts(QKeySequence::Open);
QMenu *saveAsMenu = fileMenu->addMenu(tr("&Save As"));
connect(saveAsMenu, &QMenu::aboutToShow,
this, &MainWindow::aboutToShowSaveAsMenu);
for (const auto codec : std::as_const(codecs)) {
const QByteArray name = codec->name();
QAction *action = saveAsMenu->addAction(tr("%1...").arg(QLatin1String(name)));
action->setData(QVariant(name));
connect(action, &QAction::triggered, this, &MainWindow::save);
saveAsActs.append(action);
}
fileMenu->addSeparator();
QAction *exitAct = fileMenu->addAction(tr("E&xit"), this, &QWidget::close);
exitAct->setShortcuts(QKeySequence::Quit);
auto toolMenu = menuBar()->addMenu(tr("&Tools"));
auto encodingAction = toolMenu->addAction(tr("Encodings"), this, &MainWindow::encodingDialog);
encodingAction->setShortcut(Qt::CTRL + Qt::Key_E);
encodingAction->setToolTip(tr("Shows a dialog allowing to convert to common encoding in programming languages."));
menuBar()->addSeparator();
QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
helpMenu->addAction(tr("&About"), this, &MainWindow::about);
helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
}
void MainWindow::encodingDialog()
{
if (!m_encodingDialog) {
m_encodingDialog = new EncodingDialog(this);
const QRect screenGeometry = screen()->geometry();
m_encodingDialog->setMinimumWidth(screenGeometry.width() / 4);
}
m_encodingDialog->show();
m_encodingDialog->raise();
}
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