Introduce StandardShortcutWatcher to watch for runtime changes

Currently an application needs to be restarted before it can see
any changes made to the standard shortcut configuration. To notify
about changes a new class is introduced that looks for those
changes using KConfigWatcher and also updates the global map.
CCBUG:426656

1 files changed, 46 insertions, 0 deletions

diff --git a/src/gui/kstandardshortcutwatcher.cpp b/src/gui/kstandardshortcutwatcher.cpp
new file mode 100644
index 00000000..1be5e503
--- /dev/null
+++ b/src/gui/kstandardshortcutwatcher.cpp
@@ -0,0 +1,46 @@
+/*
+    SPDX-FileCopyrightText: 2022 David Redondo <kde@david-redondo.de>
+
+    SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+*/
+
+#include "kstandardshortcutwatcher.h"
+
+#include "kconfigwatcher.h"
+#include "kstandardshortcut_p.h"
+
+namespace KStandardShortcut
+{
+class StandardShortcutWatcherPrivate
+{
+public:
+    KConfigWatcher::Ptr watcher = KConfigWatcher::create(KSharedConfig::openConfig());
+};
+
+StandardShortcutWatcher::StandardShortcutWatcher(QObject *parent)
+    : QObject(parent)
+    , d(std::make_unique<StandardShortcutWatcherPrivate>())
+{
+    connect(d->watcher.get(), &KConfigWatcher::configChanged, this, [this](const KConfigGroup &group, const QByteArrayList &keys) {
+        if (group.name() != QStringLiteral("Shortcuts")) {
+            return;
+        }
+        for (const auto &key : keys) {
+            const StandardShortcut shortcut = KStandardShortcut::findByName(QString::fromUtf8(key));
+            if (shortcut != KStandardShortcut::AccelNone) {
+                initialize(shortcut);
+                Q_EMIT shortcutChanged(shortcut, KStandardShortcut::shortcut(shortcut));
+            }
+        }
+    });
+}
+
+StandardShortcutWatcher::~StandardShortcutWatcher() = default;
+
+StandardShortcutWatcher *shortcutWatcher()
+{
+    static StandardShortcutWatcher watcher;
+    return &watcher;
+}
+
+}