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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "classnamevalidatinglineedit.h"
#include "qtcassert.h"
#include <QRegularExpression>
/*!
\class Utils::ClassNameValidatingLineEdit
\brief The ClassNameValidatingLineEdit class implements a line edit that
validates a C++ class name and emits a signal
to derive suggested file names from it.
*/
namespace Utils {
// Match something like "Namespace1::Namespace2::ClassName".
struct ClassNameValidatingLineEditPrivate
{
QRegularExpression m_nameRegexp;
QString m_namespaceDelimiter{"::"};
bool m_namespacesEnabled = false;
bool m_lowerCaseFileName = true;
bool m_forceFirstCapitalLetter = false;
};
// --------------------- ClassNameValidatingLineEdit
ClassNameValidatingLineEdit::ClassNameValidatingLineEdit(QWidget *parent) :
FancyLineEdit(parent),
d(new ClassNameValidatingLineEditPrivate)
{
setValidationFunction([this](FancyLineEdit *edit, QString *errorMessage) {
return validateClassName(edit, errorMessage);
});
updateRegExp();
}
ClassNameValidatingLineEdit::~ClassNameValidatingLineEdit()
{
delete d;
}
bool ClassNameValidatingLineEdit::namespacesEnabled() const
{
return d->m_namespacesEnabled;
}
void ClassNameValidatingLineEdit::setNamespacesEnabled(bool b)
{
d->m_namespacesEnabled = b;
}
/**
* @return Language-specific namespace delimiter, e.g. '::' or '.'
*/
QString ClassNameValidatingLineEdit::namespaceDelimiter()
{
return d->m_namespaceDelimiter;
}
/**
* @brief Sets language-specific namespace delimiter, e.g. '::' or '.'
* Do not use identifier characters in delimiter
*/
void ClassNameValidatingLineEdit::setNamespaceDelimiter(const QString &delimiter)
{
d->m_namespaceDelimiter = delimiter;
}
bool ClassNameValidatingLineEdit::validateClassName(FancyLineEdit *edit, QString *errorMessage) const
{
QTC_ASSERT(d->m_nameRegexp.isValid(), return false);
const QString value = edit->text();
if (!d->m_namespacesEnabled && value.contains(d->m_namespaceDelimiter)) {
if (errorMessage)
*errorMessage = tr("The class name must not contain namespace delimiters.");
return false;
} else if (value.isEmpty()) {
if (errorMessage)
*errorMessage = tr("Please enter a class name.");
return false;
} else if (!d->m_nameRegexp.match(value).hasMatch()) {
if (errorMessage)
*errorMessage = tr("The class name contains invalid characters.");
return false;
}
return true;
}
void ClassNameValidatingLineEdit::handleChanged(const QString &t)
{
if (isValid()) {
// Suggest file names, strip namespaces
QString fileName = d->m_lowerCaseFileName ? t.toLower() : t;
if (d->m_namespacesEnabled) {
const int namespaceIndex = fileName.lastIndexOf(d->m_namespaceDelimiter);
if (namespaceIndex != -1)
fileName.remove(0, namespaceIndex + d->m_namespaceDelimiter.size());
}
emit updateFileName(fileName);
}
}
QString ClassNameValidatingLineEdit::fixInputString(const QString &string)
{
if (!forceFirstCapitalLetter())
return string;
QString fixedString = string;
if (!string.isEmpty() && string.at(0).isLower())
fixedString[0] = string.at(0).toUpper();
return fixedString;
}
void ClassNameValidatingLineEdit::updateRegExp() const
{
const QString pattern = "^%1(%2%1)*$";
d->m_nameRegexp.setPattern(pattern.arg("[a-zA-Z_][a-zA-Z0-9_]*")
.arg(QRegularExpression::escape(d->m_namespaceDelimiter)));
}
QString ClassNameValidatingLineEdit::createClassName(const QString &name)
{
// Remove spaces and convert the adjacent characters to uppercase
QString className = name;
const QRegularExpression spaceMatcher(" +(\\w)");
QTC_CHECK(spaceMatcher.isValid());
while (true) {
const QRegularExpressionMatch match = spaceMatcher.match(className);
if (!match.hasMatch())
break;
className.replace(match.capturedStart(), match.capturedLength(), match.captured(1).toUpper());
}
// Filter out any remaining invalid characters
className.remove(QRegularExpression("[^a-zA-Z0-9_]"));
// If the first character is numeric, prefix the name with a "_"
if (className.at(0).isNumber()) {
className.prepend(QLatin1Char('_'));
} else {
// Convert the first character to uppercase
className.replace(0, 1, className.left(1).toUpper());
}
return className;
}
bool ClassNameValidatingLineEdit::lowerCaseFileName() const
{
return d->m_lowerCaseFileName;
}
void ClassNameValidatingLineEdit::setLowerCaseFileName(bool v)
{
d->m_lowerCaseFileName = v;
}
bool ClassNameValidatingLineEdit::forceFirstCapitalLetter() const
{
return d->m_forceFirstCapitalLetter;
}
void ClassNameValidatingLineEdit::setForceFirstCapitalLetter(bool b)
{
d->m_forceFirstCapitalLetter = b;
}
} // namespace Utils
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