Lua: Expose QCompleter

Change-Id: I93f0adad78d3cff23a5431ad211e66b481360d1f
Reviewed-by: <lie@spyro-soft.com>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/lua/bindings/qt.cpp

@@ -3,6 +3,9 @@
 
 #include "../luaengine.h"
 
+#include "utils.h"
+
+#include <QCompleter>
 #include <QDir>
 
 namespace Lua::Internal {
@@ -11,6 +14,32 @@ void setupQtModule()
 {
     registerProvider("Qt", [](sol::state_view lua) {
         sol::table qt(lua, sol::create);
+        const ScriptPluginSpec *pluginSpec = lua.get<ScriptPluginSpec *>("PluginSpec");
+
+        qt.new_usertype<QCompleter>(
+            "QCompleter",
+            "create",
+            [](const QStringList &list) -> std::unique_ptr<QCompleter> {
+                return std::make_unique<QCompleter>(list);
+            },
+            "currentCompletion",
+            &QCompleter::currentCompletion,
+            "completionMode",
+            sol::property(&QCompleter::completionMode,
+                          [](QCompleter *c, QCompleter::CompletionMode mode) {
+                              c->setCompletionMode(mode);
+                          }),
+            "onActivated",
+            sol::property([guard = pluginSpec](QCompleter &obj, sol::function callback) {
+                QObject::connect(&obj,
+                                 QOverload<const QString &>::of(&QCompleter::activated),
+                                 guard->connectionGuard.get(),
+                                 [callback](const QString &arg) {
+                                     void_safe_call(callback, arg);
+                                 });})
+            );
+
+        mirrorEnum(qt, QMetaEnum::fromType<QCompleter::CompletionMode>(), "QCompleterCompletionMode");
 
         // clang-format off
         qt["TextElideMode"] = lua.create_table_with(

src/plugins/lua/meta/qt.lua

@@ -4,6 +4,29 @@
 
 local qt = {}
 
+---@enum CompleterCompletionMode
+qt.CompleterCompletionMode = {
+    PopupCompletion = 0,
+    InlineCompletion = 1,
+    UnfilteredPopupCompletion = 2,
+};
+
+---Creates QCompleter.
+---@class QCompleter
+---@field completionMode CompleterCompletionMode The completion mode.
+local QCompleter = {}
+
+---Returns current completion.
+---@return string
+function qt.QCompleter:currentCompletion() end
+
+---@param params string list A list of suggestions.
+---@return QCompleter Created Completer.
+function qt.QCompleter.create(params) end
+
+---@param function The function to be called when user choice is selected from popup.
+function qt.QCompleter.onActivated(function) end
+
 ---@enum TextElideMode
 qt.TextElideMode = {
     ElideLeft = 0,