Internals: Shuffled some of the windows-specific includes to avoid du…

…plication. Might have undesirable side-effects on some compilers, please report!

imgui.cpp

@@ -814,6 +814,34 @@ CODE
 #include <stdint.h>     // intptr_t
 #endif
 
+// [Windows] OS specific includes (optional)
+#if defined(_WIN32) && defined(IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS) && defined(IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS) && defined(IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS)
+#define IMGUI_DISABLE_WIN32_FUNCTIONS
+#endif
+#if defined(_WIN32) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS)
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#ifndef NOMINMAX
+#define NOMINMAX
+#endif
+#ifndef __MINGW32__
+#include <Windows.h>        // _wfopen, OpenClipboard
+#else
+#include <windows.h>
+#endif
+#include <stringapiset.h>   // MultiByteToWideChar, WideCharToMultiByte
+#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP) // UWP doesn't have all Win32 functions
+#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS
+#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS
+#endif
+#endif
+
+// [Apple] OS specific includes
+#if defined(__APPLE__)
+#include <TargetConditionals.h>
+#endif
+
 // Visual Studio warnings
 #ifdef _MSC_VER
 #pragma warning (disable: 4127)             // condition expression is constant
@@ -1516,20 +1544,6 @@ ImU32 ImHashStr(const char* data_p, size_t data_size, ImU32 seed)
 // Default file functions
 #ifndef IMGUI_DISABLE_DEFAULT_FILE_FUNCTIONS
 
-#if defined(_WIN32) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS) && !defined(__CYGWIN__) && !defined(__GNUC__)
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#ifndef NOMINMAX
-#define NOMINMAX
-#endif
-#ifndef __MINGW32__
-#include <Windows.h>
-#else
-#include <windows.h>
-#endif
-#endif
-
 ImFileHandle ImFileOpen(const char* filename, const char* mode)
 {
 #if defined(_WIN32) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS) && !defined(__CYGWIN__) && !defined(__GNUC__)
@@ -1541,7 +1555,7 @@ ImFileHandle ImFileOpen(const char* filename, const char* mode)
     buf.resize(filename_wsize + mode_wsize);
     ::MultiByteToWideChar(CP_UTF8, 0, filename, -1, (wchar_t*)&buf[0], filename_wsize);
     ::MultiByteToWideChar(CP_UTF8, 0, mode, -1, (wchar_t*)&buf[filename_wsize], mode_wsize);
-    return _wfopen((const wchar_t*)&buf[0], (const wchar_t*)&buf[filename_wsize]);
+    return ::_wfopen((const wchar_t*)&buf[0], (const wchar_t*)&buf[filename_wsize]);
 #else
     return fopen(filename, mode);
 #endif
@@ -9784,27 +9798,6 @@ static void WindowSettingsHandler_WriteAll(ImGuiContext* ctx, ImGuiSettingsHandl
 // [SECTION] PLATFORM DEPENDENT HELPERS
 //-----------------------------------------------------------------------------
 
-#if defined(_WIN32) && !defined(_WINDOWS_) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS) && (!defined(IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS) || !defined(IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS))
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#ifndef NOMINMAX
-#define NOMINMAX
-#endif
-#ifndef __MINGW32__
-#include <Windows.h>
-#else
-#include <windows.h>
-#endif
-#include <stringapiset.h>
-#if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_APP) // UWP doesn't have Win32 functions
-#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS
-#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCTIONS
-#endif
-#elif defined(__APPLE__)
-#include <TargetConditionals.h>
-#endif
-
 #if defined(_WIN32) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS) && !defined(IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCTIONS)
 
 #ifdef _MSC_VER