From 59a7b94ef4bb4d4cf6597d53bdacccbf5720e694 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 5 Dec 2022 16:17:31 +0400
Subject: [PATCH] Track palette version.

---
 ui/style/style_core.cpp | 6 ++++++
 ui/style/style_core.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/ui/style/style_core.cpp b/ui/style/style_core.cpp
index 48d1dd4..5764612 100644
--- a/ui/style/style_core.cpp
+++ b/ui/style/style_core.cpp
@@ -25,6 +25,7 @@ constexpr auto kMinContrastDistance = 64 * 64 * 4;
 constexpr auto kContrastDeltaL = 64;
 
 auto PaletteChanges = rpl::event_stream<>();
+auto PaletteVersion = 0;
 auto ShortAnimationRunning = rpl::variable<bool>(false);
 auto RunningShortAnimations = 0;
 
@@ -73,7 +74,12 @@ rpl::producer<> PaletteChanged() {
 	return internal::PaletteChanges.events();
 }
 
+int PaletteVersion() {
+	return internal::PaletteVersion;
+}
+
 void NotifyPaletteChanged() {
+	++internal::PaletteVersion;
 	internal::PaletteChanges.fire({});
 }
 
diff --git a/ui/style/style_core.h b/ui/style/style_core.h
index cd9324f..035c20f 100644
--- a/ui/style/style_core.h
+++ b/ui/style/style_core.h
@@ -39,6 +39,7 @@ void startManager(int scale);
 void stopManager();
 
 [[nodiscard]] rpl::producer<> PaletteChanged();
+[[nodiscard]] int PaletteVersion();
 void NotifyPaletteChanged();
 
 [[nodiscard]] rpl::producer<bool> ShortAnimationPlaying();