From 0e0b8d102711e3e15f2750ae352387a9a0db2b35 Mon Sep 17 00:00:00 2001
From: Chocobo1 <Chocobo1@users.noreply.github.com>
Date: Sat, 17 Sep 2022 01:12:12 +0800
Subject: [PATCH] Revive dark theme detection

The code was removed in 199d770e152275d01da6134b802f2e16fa4e96af and now revived.
---
 src/gui/utils.cpp | 9 +++++++++
 src/gui/utils.h   | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/src/gui/utils.cpp b/src/gui/utils.cpp
index b40dcbbf6..99d31997c 100644
--- a/src/gui/utils.cpp
+++ b/src/gui/utils.cpp
@@ -34,8 +34,10 @@
 #endif
 
 #include <QApplication>
+#include <QColor>
 #include <QDesktopServices>
 #include <QIcon>
+#include <QPalette>
 #include <QPixmap>
 #include <QPixmapCache>
 #include <QPoint>
@@ -54,6 +56,13 @@
 #include "base/utils/fs.h"
 #include "base/utils/version.h"
 
+bool Utils::Gui::isDarkTheme()
+{
+    const QPalette palette = qApp->palette();
+    const QColor &color = palette.color(QPalette::Active, QPalette::Base);
+    return (color.lightness() < 127);
+}
+
 QPixmap Utils::Gui::scaledPixmap(const QIcon &icon, const QWidget *widget, const int height)
 {
     Q_UNUSED(widget);  // TODO: remove it
diff --git a/src/gui/utils.h b/src/gui/utils.h
index 58c9ac27f..ccf67f172 100644
--- a/src/gui/utils.h
+++ b/src/gui/utils.h
@@ -38,6 +38,8 @@ class QWidget;
 
 namespace Utils::Gui
 {
+    bool isDarkTheme();
+
     QPixmap scaledPixmap(const QIcon &icon, const QWidget *widget, int height);
     QPixmap scaledPixmap(const Path &path, const QWidget *widget, int height = 0);
     QPixmap scaledPixmapSvg(const Path &path, const QWidget *widget, int height);