kate: add config page with 'Automatic completion' toggle

Adds a Settings → Configure Kate → Plugins → Ollie config page with a
checkbox to enable/disable automatic ghost text completion. The setting
persists via KConfig and is applied when the ghost provider is created.

kate/ollie_kate.cpp

@@ -12,6 +12,7 @@
 #endif
 
 #include <QApplication>
+#include <QCheckBox>
 #include <QDir>
 #include <QFileInfo>
 #include <QHash>
@@ -19,6 +20,7 @@
 #include <QMainWindow>
 #include <QMenu>
 #include <QStatusBar>
+#include <QVBoxLayout>
 
 K_PLUGIN_CLASS_WITH_JSON(OllieKatePlugin, "metadata.json")
 
@@ -54,6 +56,64 @@ void OllieKatePlugin::loadConfig()
     m_completionEnabled = grp.readEntry("CompletionEnabled", true);
 }
 
+void OllieKatePlugin::saveConfig()
+{
+    KConfigGroup grp(KSharedConfig::openConfig(), QStringLiteral("Ollie"));
+    grp.writeEntry("CompletionEnabled", m_completionEnabled);
+    grp.sync();
+}
+
+void OllieKatePlugin::setCompletionEnabled(bool enabled)
+{
+    m_completionEnabled = enabled;
+    saveConfig();
+}
+
+int OllieKatePlugin::configPages() const
+{
+    return 1;
+}
+
+KTextEditor::ConfigPage *OllieKatePlugin::configPage(int number, QWidget *parent)
+{
+    if (number != 0) return nullptr;
+
+    class OllieConfigPage : public KTextEditor::ConfigPage
+    {
+    public:
+        OllieConfigPage(OllieKatePlugin *plugin, QWidget *parent)
+            : KTextEditor::ConfigPage(parent), m_plugin(plugin)
+        {
+            auto *layout = new QVBoxLayout(this);
+            m_enabledCheck = new QCheckBox(QStringLiteral("Automatic completion (ghost text)"), this);
+            layout->addWidget(m_enabledCheck);
+            layout->addStretch();
+            reset();
+            connect(m_enabledCheck, &QCheckBox::toggled, this, &ConfigPage::changed);
+        }
+
+        QString name() const override { return QStringLiteral("Ollie"); }
+        QString fullName() const override { return QStringLiteral("Ollie Settings"); }
+        QIcon icon() const override { return QIcon::fromTheme(QStringLiteral("system-run")); }
+
+        void apply() override {
+            m_plugin->setCompletionEnabled(m_enabledCheck->isChecked());
+        }
+        void reset() override {
+            m_enabledCheck->setChecked(m_plugin->completionEnabled());
+        }
+        void defaults() override {
+            m_enabledCheck->setChecked(true);
+        }
+
+    private:
+        OllieKatePlugin *m_plugin;
+        QCheckBox *m_enabledCheck;
+    };
+
+    return new OllieConfigPage(this, parent);
+}
+
 // --- View ---
 
 OllieKateView::OllieKateView(OllieKatePlugin *plugin, KTextEditor::MainWindow *mainWindow)
@@ -494,6 +554,7 @@ void OllieKateView::setupGhostProvider()
     }
 
     m_ghost = new OllieGhostProvider(view, m_plugin, this);
+    m_ghost->setEnabled(m_plugin->completionEnabled());
 
     if (QWidget *proxy = view->focusProxy()) {
         proxy->installEventFilter(this);

kate/ollie_kate.h

@@ -2,6 +2,7 @@
 #define OLLIE_KATE_PLUGIN_H
 
 #include <KTextEditor/Plugin>
+#include <KTextEditor/ConfigPage>
 #include <KTextEditor/MainWindow>
 #include <KTextEditor/View>
 #if QT_VERSION_MAJOR >= 6
@@ -32,14 +33,18 @@ public:
     ~OllieKatePlugin() override = default;
 
     QObject *createView(KTextEditor::MainWindow *mainWindow) override;
+    int configPages() const override;
+    KTextEditor::ConfigPage *configPage(int number, QWidget *parent) override;
 
     // Completion config accessors
     QString completionBackend() const { return m_completionBackend; }
     QString completionModel() const { return m_completionModel; }
     bool completionEnabled() const { return m_completionEnabled; }
+    void setCompletionEnabled(bool enabled);
 
 private:
     void loadConfig();
+    void saveConfig();
 
     QString m_completionBackend;
     QString m_completionModel;