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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 "filenamevalidatinglineedit.h"
#include "qtcassert.h"
#include <QRegularExpression>
/*!
\class Utils::FileNameValidatingLineEdit
\brief The FileNameValidatingLineEdit class is a control that lets the user
choose a (base) file name, based on a QLineEdit.
The class has
some validation logic for embedding into QWizardPage.
*/
namespace Utils {
#define WINDOWS_DEVICES_PATTERN "(CON|AUX|PRN|NUL|COM[1-9]|LPT[1-9])(\\..*)?"
// Naming a file like a device name will break on Windows, even if it is
// "com1.txt". Since we are cross-platform, we generally disallow such file
// names.
static const QRegularExpression &windowsDeviceNoSubDirPattern()
{
static const QRegularExpression rc(QString("^" WINDOWS_DEVICES_PATTERN "$"),
QRegularExpression::CaseInsensitiveOption);
QTC_ASSERT(rc.isValid(), return rc);
return rc;
}
static const QRegularExpression &windowsDeviceSubDirPattern()
{
static const QRegularExpression rc(QString("^.*[/\\\\]" WINDOWS_DEVICES_PATTERN "$"),
QRegularExpression::CaseInsensitiveOption);
QTC_ASSERT(rc.isValid(), return rc);
return rc;
}
// ----------- FileNameValidatingLineEdit
FileNameValidatingLineEdit::FileNameValidatingLineEdit(QWidget *parent) :
FancyLineEdit(parent),
m_allowDirectories(false),
m_forceFirstCapitalLetter(false)
{
setValidationFunction([this](FancyLineEdit *edit, QString *errorMessage) {
return validateFileNameExtension(edit->text(), requiredExtensions(), errorMessage)
&& validateFileName(edit->text(), allowDirectories(), errorMessage);
});
}
bool FileNameValidatingLineEdit::allowDirectories() const
{
return m_allowDirectories;
}
void FileNameValidatingLineEdit::setAllowDirectories(bool v)
{
m_allowDirectories = v;
}
bool FileNameValidatingLineEdit::forceFirstCapitalLetter() const
{
return m_forceFirstCapitalLetter;
}
void FileNameValidatingLineEdit::setForceFirstCapitalLetter(bool b)
{
m_forceFirstCapitalLetter = b;
}
/* Validate a file base name, check for forbidden characters/strings. */
#define SLASHES "/\\"
static const char notAllowedCharsSubDir[] = ",^@={}[]~!?:&*\"|#%<>$\"'();`' ";
static const char notAllowedCharsNoSubDir[] = ",^@={}[]~!?:&*\"|#%<>$\"'();`' " SLASHES;
static const char *notAllowedSubStrings[] = {".."};
bool FileNameValidatingLineEdit::validateFileName(const QString &name,
bool allowDirectories,
QString *errorMessage /* = 0*/)
{
if (name.isEmpty()) {
if (errorMessage)
*errorMessage = tr("Name is empty.");
return false;
}
// Characters
const char *notAllowedChars = allowDirectories ? notAllowedCharsSubDir : notAllowedCharsNoSubDir;
for (const char *c = notAllowedChars; *c; c++)
if (name.contains(QLatin1Char(*c))) {
if (errorMessage) {
const QChar qc = QLatin1Char(*c);
if (qc.isSpace())
*errorMessage = tr("Name contains white space.");
else
*errorMessage = tr("Invalid character \"%1\".").arg(qc);
}
return false;
}
// Substrings
const int notAllowedSubStringCount = sizeof(notAllowedSubStrings)/sizeof(const char *);
for (int s = 0; s < notAllowedSubStringCount; s++) {
const QLatin1String notAllowedSubString(notAllowedSubStrings[s]);
if (name.contains(notAllowedSubString)) {
if (errorMessage)
*errorMessage = tr("Invalid characters \"%1\".").arg(QString(notAllowedSubString));
return false;
}
}
// Windows devices
bool matchesWinDevice = name.contains(windowsDeviceNoSubDirPattern());
if (!matchesWinDevice && allowDirectories)
matchesWinDevice = name.contains(windowsDeviceSubDirPattern());
if (matchesWinDevice) {
if (errorMessage)
*errorMessage = tr("Name matches MS Windows device"
" (CON, AUX, PRN, NUL,"
" COM1, COM2, ..., COM9,"
" LPT1, LPT2, ..., LPT9)");
return false;
}
return true;
}
QString FileNameValidatingLineEdit::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;
}
bool FileNameValidatingLineEdit::validateFileNameExtension(const QString &fileName,
const QStringList &requiredExtensions,
QString *errorMessage)
{
// file extension
if (!requiredExtensions.isEmpty()) {
for (const QString &requiredExtension : requiredExtensions) {
QString extension = QLatin1Char('.') + requiredExtension;
if (fileName.endsWith(extension, Qt::CaseSensitive) && extension.count() < fileName.count())
return true;
}
if (errorMessage) {
if (requiredExtensions.count() == 1)
*errorMessage = tr("File extension %1 is required:").arg(requiredExtensions.first());
else
*errorMessage = tr("File extensions %1 are required:").arg(requiredExtensions.join(QLatin1String(", ")));
}
return false;
}
return true;
}
QStringList FileNameValidatingLineEdit::requiredExtensions() const
{
return m_requiredExtensionList;
}
void FileNameValidatingLineEdit::setRequiredExtensions(const QStringList &extensions)
{
m_requiredExtensionList = extensions;
}
} // namespace Utils
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