Lua: Add QFontMetrics type

Change-Id: Iaaf49ffe2b634070c3a650ba2070ee0ea1b517d7
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>

src/plugins/lua/bindings/qt.cpp

@@ -12,6 +12,7 @@
 #include <QCompleter>
 #include <QDir>
 #include <QFileDevice>
+#include <QFontMetrics>
 #include <QStandardPaths>
 
 namespace Lua::Internal {
@@ -53,6 +54,15 @@ void setupQtModule()
 
         qt["clipboard"] = &QApplication::clipboard;
 
+        qt.new_usertype<QFontMetrics>(
+            "QFontMetrics",
+            "create",
+            [](const QFont &font) -> std::unique_ptr<QFontMetrics> {
+                return std::make_unique<QFontMetrics>(font);
+            },
+            "height",
+            &QFontMetrics::height);
+
         mirrorEnum(qt, QMetaEnum::fromType<QCompleter::CompletionMode>(), "QCompleterCompletionMode");
 
         // clang-format off

src/plugins/lua/meta/qt.lua

@@ -34,6 +34,18 @@ qt.QClipboard = {}
 ---@return QClipboard globalClipboard The global clipboard object.
 function qt.clipboard() end
 
+---@class QFontMetrics A Lua wrapper for the Qt `QFontMetrics` class.
+qt.QFontMetrics = {}
+
+---Returns current font height.
+---@return int
+function qt.QFontMetrics:height() end
+
+---Creates a new QFontMetrics.
+---@param font QFont
+---@return QFontMetrics fontMetrics The new QFontMetrics.
+function qt.QFontMetrics.create(params) end
+
 ---@enum TextElideMode
 qt.TextElideMode = {
     ElideLeft = 0,