1 files changed, 113 insertions, 0 deletions
diff --git a/widget/windows/nsUXThemeData.h b/widget/windows/nsUXThemeData.h
new file mode 100644
index 0000000000..d7c0200835
--- /dev/null
+++ b/widget/windows/nsUXThemeData.h
@@ -0,0 +1,113 @@
+/* vim: se cin sw=2 ts=2 et : */
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef __UXThemeData_h__
+#define __UXThemeData_h__
+#include <windows.h>
+#include <uxtheme.h>
+
+#include "nscore.h"
+#include "mozilla/LookAndFeel.h"
+#include "mozilla/Maybe.h"
+#include "WinUtils.h"
+
+#include "nsWindowDefs.h"
+
+enum nsUXThemeClass {
+  eUXButton = 0,
+  eUXEdit,
+  eUXRebar,
+  eUXMediaRebar,
+  eUXCommunicationsRebar,
+  eUXBrowserTabBarRebar,
+  eUXToolbar,
+  eUXMediaToolbar,
+  eUXCommunicationsToolbar,
+  eUXProgress,
+  eUXTab,
+  eUXTrackbar,
+  eUXSpin,
+  eUXStatus,
+  eUXCombobox,
+  eUXHeader,
+  eUXListview,
+  eUXMenu,
+  eUXWindowFrame,
+  eUXNumClasses
+};
+
+enum CmdButtonIdx {
+  CMDBUTTONIDX_MINIMIZE = 0,
+  CMDBUTTONIDX_RESTORE,
+  CMDBUTTONIDX_CLOSE,
+  CMDBUTTONIDX_BUTTONBOX
+};
+
+class nsUXThemeData {
+  // This class makes sure we don't attempt to open a theme if the previous
+  // loading attempt has failed because OpenThemeData is a heavy task and
+  // it's less likely that the API returns a different result.
+  class ThemeHandle final {
+    mozilla::Maybe<HANDLE> mHandle;
+
+   public:
+    ThemeHandle() = default;
+    ~ThemeHandle();
+
+    // Disallow copy and move
+    ThemeHandle(const ThemeHandle&) = delete;
+    ThemeHandle(ThemeHandle&&) = delete;
+    ThemeHandle& operator=(const ThemeHandle&) = delete;
+    ThemeHandle& operator=(ThemeHandle&&) = delete;
+
+    operator HANDLE();
+    void OpenOnce(HWND aWindow, LPCWSTR aClassList);
+    void Close();
+  };
+
+  static ThemeHandle sThemes[eUXNumClasses];
+
+  // We initialize sCommandButtonBoxMetrics separately as a performance
+  // optimization to avoid fetching dummy values for sCommandButtonMetrics
+  // when we don't need those.
+  static SIZE sCommandButtonMetrics[3];
+  static bool sCommandButtonMetricsInitialized;
+  static SIZE sCommandButtonBoxMetrics;
+  static bool sCommandButtonBoxMetricsInitialized;
+
+  static const wchar_t* GetClassName(nsUXThemeClass);
+  static void EnsureCommandButtonMetrics();
+  static void EnsureCommandButtonBoxMetrics();
+
+ public:
+  static bool sTitlebarInfoPopulatedAero;
+  static bool sTitlebarInfoPopulatedThemed;
+  static bool sIsDefaultWindowsTheme;
+  static bool sIsHighContrastOn;
+
+  static void Invalidate();
+  static HANDLE GetTheme(nsUXThemeClass cls);
+  static HMODULE GetThemeDLL();
+
+  // nsWindow calls this to update desktop settings info
+  static void UpdateTitlebarInfo(HWND aWnd);
+
+  static SIZE GetCommandButtonMetrics(CmdButtonIdx aMetric) {
+    EnsureCommandButtonMetrics();
+    return sCommandButtonMetrics[aMetric];
+  }
+  static SIZE GetCommandButtonBoxMetrics() {
+    EnsureCommandButtonBoxMetrics();
+    return sCommandButtonBoxMetrics;
+  }
+  static void UpdateNativeThemeInfo();
+  static bool IsDefaultWindowTheme();
+  static bool IsHighContrastOn();
+
+  static bool AreFlatMenusEnabled();
+  static bool IsAppThemed();
+};
+#endif  // __UXThemeData_h__