1 files changed, 81 insertions, 0 deletions
diff --git a/src/mainwindow/widgets/completer.cpp b/src/mainwindow/widgets/completer.cpp
new file mode 100644
index 0000000..578f745
--- /dev/null
+++ b/src/mainwindow/widgets/completer.cpp
@@ -0,0 +1,81 @@
+/*
+ * This file is part of smolbote. It's copyrighted by the contributors recorded
+ * in the version control history of the file, available from its original
+ * location: https://neueland.iserlohn-fortress.net/gitea/aqua/smolbote
+ *
+ * SPDX-License-Identifier: GPL-3.0
+ */
+
+#include "completer.h"
+#include <QKeyEvent>
+
+Completer::Completer(QWidget *parent)
+    : QListView(parent)
+{
+    setObjectName("Completer");
+    setWindowFlags(Qt::ToolTip);
+    setEditTriggers(QAbstractItemView::NoEditTriggers);
+
+    connect(this, &Completer::activated, [=](const QModelIndex &index) {
+        hide();
+        emit completionActivated(index.data().toString());
+    });
+}
+
+bool Completer::updateItems(const QStringList &list)
+{
+    if(list.isEmpty())
+        return false;
+
+    auto *model = new QStringListModel(list, this);
+    setModel(model);
+
+    delete completionModel;
+    completionModel = model;
+
+    return true;
+}
+
+bool Completer::keyPressed(QKeyEvent *event)
+{
+    if(isHidden())
+        return false;
+
+    Q_CHECK_PTR(completionModel);
+
+    int count = completionModel->rowCount();
+    const QModelIndex currentIndex = this->currentIndex();
+
+    switch(event->key()) {
+    case Qt::Key_Down:
+        if(currentIndex.row() + 1 >= count) {
+            setCurrentIndex(completionModel->index(0, 0));
+        } else {
+            setCurrentIndex(completionModel->index(currentIndex.row() + 1, 0));
+        }
+        break;
+
+    case Qt::Key_Up:
+        if(currentIndex.row() == 0) {
+            setCurrentIndex(completionModel->index(count - 1, 0));
+        } else {
+            setCurrentIndex(completionModel->index(currentIndex.row() - 1, 0));
+        }
+        break;
+
+    case Qt::Key_Escape:
+        hide();
+        break;
+
+    case Qt::Key_Enter:
+    case Qt::Key_Return:
+        hide();
+        emit completionActivated(currentIndex.data().toString());
+        break;
+
+    default:
+        return false;
+    }
+
+    return true;
+}