From d36ed6c52f679ad0f9a0e89a4e1d09b763f063b8 Mon Sep 17 00:00:00 2001
From: Yuqian Yang <crupest@crupest.life>
Date: Sun, 7 Sep 2025 19:51:27 +0800
Subject: Move ImplementFormatterByToUtf8String.

---
 include/cru/base/Format.h           | 13 +++++++++++++
 include/cru/platform/GraphicsBase.h | 18 +++---------------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/include/cru/base/Format.h b/include/cru/base/Format.h
index d5c5ed99..83fda3f1 100644
--- a/include/cru/base/Format.h
+++ b/include/cru/base/Format.h
@@ -151,4 +151,17 @@ template <typename... T>
 String String::Format(T&&... args) const {
   return cru::Format(*this, std::forward<T>(args)...);
 }
+
+template <typename T>
+struct ImplementFormatterByToUtf8String {
+  template <class ParseContext>
+  constexpr ParseContext::iterator parse(ParseContext& ctx) const {
+    return ctx.end();
+  }
+
+  template <class FmtContext>
+  FmtContext::iterator format(const T& object, FmtContext& ctx) const {
+    return std::ranges::copy(ToUtf8String(object), ctx.out()).out;
+  }
+};
 }  // namespace cru
diff --git a/include/cru/platform/GraphicsBase.h b/include/cru/platform/GraphicsBase.h
index fb8d6bdd..5c4435ea 100644
--- a/include/cru/platform/GraphicsBase.h
+++ b/include/cru/platform/GraphicsBase.h
@@ -1,6 +1,7 @@
 #pragma once
 #include "Base.h"
 
+#include "cru/base/Format.h"
 #include "cru/base/Range.h"
 #include "cru/base/String.h"
 
@@ -295,23 +296,10 @@ constexpr bool operator!=(const Ellipse& left, const Ellipse& right) {
 using TextRange = Range;
 }  // namespace cru::platform
 
-template <typename T>
-struct ImplementFormatterByToUtf8String {
-  template <class ParseContext>
-  constexpr ParseContext::iterator parse(ParseContext& ctx) const {
-    return ctx.end();
-  }
-
-  template <class FmtContext>
-  FmtContext::iterator format(const T& object, FmtContext& ctx) const {
-    return std::ranges::copy(ToUtf8String(object), ctx.out()).out;
-  }
-};
-
 template <>
 struct std::formatter<cru::platform::Point, char>
-    : ImplementFormatterByToUtf8String<cru::platform::Point> {};
+    : cru::ImplementFormatterByToUtf8String<cru::platform::Point> {};
 
 template <>
 struct std::formatter<cru::platform::Size, char>
-    : ImplementFormatterByToUtf8String<cru::platform::Size> {};
+    : cru::ImplementFormatterByToUtf8String<cru::platform::Size> {};
-- 
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