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// Copyright (C) 2017 Andre Hartmann <aha_1980@gmx.de>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "sendframebox.h"
#include "ui_sendframebox.h"
constexpr char THREE_DIGITS[] = "[[:xdigit:]]{3}";
enum {
MaxStandardId = 0x7FF,
MaxExtendedId = 0x10000000
};
enum {
MaxPayload = 8,
MaxPayloadFd = 64
};
bool isEvenHex(QString input)
{
const QChar space = QLatin1Char(' ');
input.remove(space);
if (input.size() % 2)
return false;
return true;
}
// Formats a string of hex characters with a space between every byte
// Example: "012345" -> "01 23 45"
static QString formatHexData(const QString &input)
{
const QChar space = QLatin1Char(' ');
QString out = input;
const QRegularExpression threeDigits(THREE_DIGITS);
const QRegularExpression oneDigitAndSpace(QStringLiteral("((\\s+)|^)([[:xdigit:]]{1})(\\s+)"));
while (oneDigitAndSpace.match(out).hasMatch() || threeDigits.match(out).hasMatch()) {
if (threeDigits.match(out).hasMatch()) {
const QRegularExpressionMatch match = threeDigits.match(out);
out.insert(match.capturedEnd() - 1, space);
} else if (oneDigitAndSpace.match(out).hasMatch()) {
const QRegularExpressionMatch match = oneDigitAndSpace.match(out);
if (out.at(match.capturedEnd() - 1) == space)
out.remove(match.capturedEnd() - 1, 1);
}
}
return out.simplified().toUpper();
}
HexIntegerValidator::HexIntegerValidator(QObject *parent) :
QValidator(parent),
m_maximum(MaxStandardId)
{
}
QValidator::State HexIntegerValidator::validate(QString &input, int &) const
{
bool ok;
uint value = input.toUInt(&ok, 16);
if (input.isEmpty())
return Intermediate;
if (!ok || value > m_maximum)
return Invalid;
return Acceptable;
}
void HexIntegerValidator::setMaximum(uint maximum)
{
m_maximum = maximum;
}
HexStringValidator::HexStringValidator(QObject *parent) :
QValidator(parent),
m_maxLength(MaxPayload)
{
}
QValidator::State HexStringValidator::validate(QString &input, int &pos) const
{
const int maxSize = 2 * m_maxLength;
const QChar space = QLatin1Char(' ');
QString data = input;
data.remove(space);
if (data.isEmpty())
return Intermediate;
// limit maximum size
if (data.size() > maxSize)
return Invalid;
// check if all input is valid
const QRegularExpression re(QStringLiteral("^[[:xdigit:]]*$"));
if (!re.match(data).hasMatch())
return Invalid;
// don't allow user to enter more than one space
const QRegularExpression twoSpaces(QStringLiteral("([\\s]{2})"));
if (twoSpaces.match(input).hasMatch()) {
const QRegularExpressionMatch match = twoSpaces.match(input);
input.replace(match.capturedStart(), 2, ' ');
pos = match.capturedEnd() - 1;
}
// insert a space after every two hex nibbles
const QRegularExpression threeDigits(THREE_DIGITS);
while (threeDigits.match(input).hasMatch()) {
const QRegularExpressionMatch match = threeDigits.match(input);
if (pos == match.capturedStart() + 1) {
// add one hex nibble before two - Abc
input.insert(match.capturedStart() + 1, space);
pos = match.capturedStart() + 1;
} else if (pos == match.capturedStart() + 2) {
// add hex nibble in the middle - aBc
input.insert(match.capturedEnd() - 1, space);
pos = match.capturedEnd();
} else {
// add one hex nibble after two - abC
input.insert(match.capturedEnd() - 1, space);
pos = match.capturedEnd() + 1;
}
}
return Acceptable;
}
void HexStringValidator::setMaxLength(int maxLength)
{
m_maxLength = maxLength;
}
SendFrameBox::SendFrameBox(QWidget *parent) :
QGroupBox(parent),
m_ui(new Ui::SendFrameBox)
{
m_ui->setupUi(this);
m_hexIntegerValidator = new HexIntegerValidator(this);
m_ui->frameIdEdit->setValidator(m_hexIntegerValidator);
m_hexStringValidator = new HexStringValidator(this);
m_ui->payloadEdit->setValidator(m_hexStringValidator);
connect(m_ui->dataFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set)
m_ui->flexibleDataRateBox->setEnabled(true);
});
connect(m_ui->remoteFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set) {
m_ui->flexibleDataRateBox->setEnabled(false);
m_ui->flexibleDataRateBox->setChecked(false);
}
});
connect(m_ui->errorFrame, &QRadioButton::toggled, this, [this](bool set) {
if (set) {
m_ui->flexibleDataRateBox->setEnabled(false);
m_ui->flexibleDataRateBox->setChecked(false);
}
});
connect(m_ui->extendedFormatBox, &QCheckBox::toggled, this, [this](bool set) {
m_hexIntegerValidator->setMaximum(set ? MaxExtendedId : MaxStandardId);
});
connect(m_ui->flexibleDataRateBox, &QCheckBox::toggled, this, [this](bool set) {
m_hexStringValidator->setMaxLength(set ? MaxPayloadFd : MaxPayload);
m_ui->bitrateSwitchBox->setEnabled(set);
if (!set)
m_ui->bitrateSwitchBox->setChecked(false);
});
auto frameIdOrPayloadChanged = [this]() {
const bool hasFrameId = !m_ui->frameIdEdit->text().isEmpty();
m_ui->sendButton->setEnabled(hasFrameId);
m_ui->sendButton->setToolTip(hasFrameId
? QString() : tr("Cannot send because no Frame ID was given."));
if (hasFrameId) {
const bool isEven = isEvenHex(m_ui->payloadEdit->text());
m_ui->sendButton->setEnabled(isEven);
m_ui->sendButton->setToolTip(isEven
? QString() : tr("Cannot send because Payload hex string is invalid."));
}
};
connect(m_ui->frameIdEdit, &QLineEdit::textChanged, frameIdOrPayloadChanged);
connect(m_ui->payloadEdit, &QLineEdit::textChanged, frameIdOrPayloadChanged);
frameIdOrPayloadChanged();
connect(m_ui->sendButton, &QPushButton::clicked, [this]() {
const uint frameId = m_ui->frameIdEdit->text().toUInt(nullptr, 16);
QString data = m_ui->payloadEdit->text();
m_ui->payloadEdit->setText(formatHexData(data));
const QByteArray payload = QByteArray::fromHex(data.remove(QLatin1Char(' ')).toLatin1());
QCanBusFrame frame = QCanBusFrame(frameId, payload);
frame.setExtendedFrameFormat(m_ui->extendedFormatBox->isChecked());
frame.setFlexibleDataRateFormat(m_ui->flexibleDataRateBox->isChecked());
frame.setBitrateSwitch(m_ui->bitrateSwitchBox->isChecked());
if (m_ui->errorFrame->isChecked())
frame.setFrameType(QCanBusFrame::ErrorFrame);
else if (m_ui->remoteFrame->isChecked())
frame.setFrameType(QCanBusFrame::RemoteRequestFrame);
emit sendFrame(frame);
});
}
SendFrameBox::~SendFrameBox()
{
delete m_ui;
}
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