// ResizableVersion.cpp: implementation of the CResizableVersion class.
//
/////////////////////////////////////////////////////////////////////////////
//
// This file is part of ResizableLib
// http://sourceforge.net/projects/resizablelib
//
// Copyright (C) 2000-2004 by Paolo Messina
// http://www.geocities.com/ppescher - mailto:ppescher@hotmail.com
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//
/////////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "ResizableVersion.h"

//////////////////////////////////////////////////////////////////////
// Static initializer object (with macros to hide in ClassView)

// static intializer must be called before user code
#pragma warning(disable:4073)
#pragma init_seg(lib)

#ifdef _UNDEFINED_
#define BEGIN_HIDDEN {
#define END_HIDDEN }
#else
#define BEGIN_HIDDEN
#define END_HIDDEN
#endif

BEGIN_HIDDEN
struct _VersionInitializer
{
    _VersionInitializer()
    {
        InitRealVersions();
    };
};
END_HIDDEN

// The one and only version-check object
static _VersionInitializer g_version;

//////////////////////////////////////////////////////////////////////
// Private implementation

// DLL Version support
#include <shlwapi.h>

static DLLVERSIONINFO g_dviCommCtrls;

static void CheckCommCtrlsVersion()
{
    // Check Common Controls version
    SecureZeroMemory(&g_dviCommCtrls, sizeof(DLLVERSIONINFO));
    HMODULE hMod = AtlLoadSystemLibraryUsingFullPath(_T("comctl32.dll"));
    if (hMod != NULL)
    {
        // Get the version function
        DLLGETVERSIONPROC pfnDllGetVersion;
        pfnDllGetVersion = (DLLGETVERSIONPROC)GetProcAddress(hMod, "DllGetVersion");

        if (pfnDllGetVersion != NULL)
        {
            // Obtain version information
            g_dviCommCtrls.cbSize = sizeof(DLLVERSIONINFO);
            if (SUCCEEDED(pfnDllGetVersion(&g_dviCommCtrls)))
            {
                ::FreeLibrary(hMod);
                return;
            }
        }

        ::FreeLibrary(hMod);
    }

    // Set values for the worst case
    g_dviCommCtrls.dwMajorVersion = 4;
    g_dviCommCtrls.dwMinorVersion = 0;
    g_dviCommCtrls.dwBuildNumber = 0;
    g_dviCommCtrls.dwPlatformID = DLLVER_PLATFORM_WINDOWS;
}


//////////////////////////////////////////////////////////////////////
// Exported global symbols

#ifdef _WIN32_IE
DWORD real_WIN32_IE = 0;
#endif

// macro to convert version numbers to hex format
#define CNV_OS_VER(x) ((BYTE)(((BYTE)(x) / 10 * 16) | ((BYTE)(x) % 10)))

void InitRealVersions()
{
    CheckCommCtrlsVersion();

#ifdef _WIN32_IE
    switch (g_dviCommCtrls.dwMajorVersion)
    {
    case 4:
        switch (g_dviCommCtrls.dwMinorVersion)
        {
        case 70:
            real_WIN32_IE = 0x0300;
            break;
        case 71:
            real_WIN32_IE = 0x0400;
            break;
        case 72:
            real_WIN32_IE = 0x0401;
            break;
        default:
            real_WIN32_IE = 0x0200;
        }
        break;
    case 5:
        if (g_dviCommCtrls.dwMinorVersion > 80)
            real_WIN32_IE = 0x0501;
        else
            real_WIN32_IE = 0x0500;
        break;
    case 6:
        real_WIN32_IE = 0x0600; // includes checks for 0x0560 (IE6)
        break;
    default:
        real_WIN32_IE = 0;
    }
#endif
}