File indexing completed on 2024-04-28 16:55:49

 /*
  * SPDX-FileCopyrightText: 2022 Aleix Pol i Gonzalez <aleixpol@kde.org>
  *
  * SPDX-License-Identifier: LGPL-2.0-or-later
  */
 
 #include "xdgshortcut.h"
 #include <QDebug>
 #include <QRegularExpression>
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #include <QtXkbCommonSupport/private/qxkbcommon_p.h>
 #else
 #include <QtGui/private/qxkbcommon_p.h>
 #endif
 
 struct Modifier {
     const char *xkbModifier;
     Qt::KeyboardModifier qtModifier;
 };
 
 std::optional<QKeySequence> XdgShortcut::parse(const QString &shortcutString)
 {
     static const QHash<QString, Modifier> allowedModifiers = {
         {"SHIFT", {XKB_MOD_NAME_SHIFT, Qt::ShiftModifier}},
         {"CAPS", {XKB_MOD_NAME_CAPS, Qt::GroupSwitchModifier}},
         {"CTRL", {XKB_MOD_NAME_CTRL, Qt::ControlModifier}},
         {"ALT", {XKB_MOD_NAME_ALT, Qt::AltModifier}},
         {"NUM", {XKB_MOD_NAME_NUM, Qt::KeypadModifier}},
         {"LOGO", {XKB_MOD_NAME_LOGO, Qt::MetaModifier}},
     };
 
     xkb_keysym_t identifier = XKB_KEY_NoSymbol;
     QStringList modifiers;
 
     QStringView remaining(shortcutString);
     while (!remaining.isEmpty()) {
         auto nextPlus = remaining.indexOf(QChar('+'));
         if (nextPlus == 0) { // ++ or ending with +
             qWarning() << "empty modifier";
             return {};
         }
 
         if (nextPlus < 0) { // just the identifier left
             // The spec says that the string ends when all the spec'ed characters are over
             // Meaning "CTRL+a;Banana" would be an acceptable and parseable string
             static QRegularExpression rx(QStringLiteral("^([\\w\\d_]+).*$"));
             Q_ASSERT(rx.isValid());
             rx.setPatternOptions(QRegularExpression::UseUnicodePropertiesOption);
             QRegularExpressionMatch match = rx.match(remaining);
             Q_ASSERT(match.isValid());
 
             identifier = xkb_keysym_from_name(match.capturedView(1).toUtf8().constData(), XKB_KEYSYM_CASE_INSENSITIVE);
             if (identifier == XKB_KEY_NoSymbol) {
                 qWarning() << "unknown key" << match.capturedView(1);
                 return false;
             }
             break;
         } else { // A modifier
             auto modifier = remaining.left(nextPlus);
             if (!allowedModifiers.contains(modifier.toString())) {
                 qWarning() << "Unknown modifier" << modifier;
                 return {};
             }
 
             modifiers << modifier.toString();
             remaining = remaining.mid(nextPlus + 1);
         }
     }
 
     int keys = 0;
     for (const QString &modifier : std::as_const(modifiers)) {
         keys |= allowedModifiers[modifier].qtModifier;
     }
 
     keys |= QXkbCommon::keysymToQtKey(identifier, Qt::NoModifier, nullptr, XKB_KEYCODE_INVALID);
     return QKeySequence(keys);
 }