//
// about.c
//
//
// common about dialog for File Manager, Program Manager, Control Panel
//

#include "shellprv.h"
#pragma  hdrstop

#include <common.ver>   // for VER_LEGALCOPYRIGHT_YEARS
#include "ids.h"        // for IDD_EULA
#include <xpsp1res.h>   // for added XPSP1 resources
#include <winbrand.h>   // for added branding resources

#define STRING_SEPARATOR TEXT('#')
#define MAX_REG_VALUE   256

#define BytesToK(pDW)   (*(pDW) = (*(pDW) + 512) / 1024)        // round up

typedef struct {
        HICON   hIcon;
        LPCTSTR szApp;
        LPCTSTR szOtherStuff;
} ABOUT_PARAMS, *LPABOUT_PARAMS;

#define REG_SETUP   TEXT("Software\\Microsoft\\Windows NT\\CurrentVersion")

BOOL_PTR CALLBACK AboutDlgProc(HWND hDlg, UINT wMsg, WPARAM wParam, LPARAM lParam);

int WINAPI ShellAboutW(HWND hWnd, LPCTSTR szApp, LPCTSTR szOtherStuff, HICON hIcon)
{
    ABOUT_PARAMS ap;
    static HMODULE s_hmodXPSP1Res = (HMODULE)-1;
    
    if (s_hmodXPSP1Res == (HMODULE)-1)
    {
        s_hmodXPSP1Res = LoadLibraryExA("xpsp1res.dll", NULL, LOAD_LIBRARY_AS_DATAFILE);
    }
       
    ap.hIcon = hIcon;
    ap.szApp = (LPWSTR)szApp;
    ap.szOtherStuff = szOtherStuff;

    return (int)DialogBoxParam(s_hmodXPSP1Res ? s_hmodXPSP1Res : HINST_THISDLL,
                               (LPTSTR)MAKEINTRESOURCE(DLG_ABOUT),
                               hWnd,
                               AboutDlgProc,
                               (LPARAM)&ap);
}

INT  APIENTRY ShellAboutA( HWND hWnd, LPCSTR szApp, LPCSTR szOtherStuff, HICON hIcon)
{
   DWORD cchLen;
   DWORD dwRet;
   LPWSTR lpszAppW;
   LPWSTR lpszOtherStuffW;

   if (szApp)
   {
      cchLen = lstrlenA(szApp)+1;
      if (!(lpszAppW = (LPWSTR)LocalAlloc(LMEM_FIXED, (cchLen * sizeof(WCHAR)))))
      {
         return(0);
      }
      else
      {
         MultiByteToWideChar(CP_ACP, 0, (LPSTR)szApp, -1,
            lpszAppW, cchLen);

      }
   }
   else
   {
      lpszAppW = NULL;
   }

   if (szOtherStuff)
   {
      cchLen = lstrlenA(szOtherStuff)+1;
      if (!(lpszOtherStuffW = (LPWSTR)LocalAlloc(LMEM_FIXED,
            (cchLen * sizeof(WCHAR)))))
      {
         if (lpszAppW)
         {
            LocalFree(lpszAppW);
         }
         return(0);
      }
      else
      {
         MultiByteToWideChar(CP_ACP, 0, (LPSTR)szOtherStuff, -1,
            lpszOtherStuffW, cchLen);

      }
   }
   else
   {
      lpszOtherStuffW = NULL;
   }

   dwRet=ShellAboutW(hWnd, lpszAppW, lpszOtherStuffW, hIcon);


   if (lpszAppW)
   {
      LocalFree(lpszAppW);
   }

   if (lpszOtherStuffW)
   {
      LocalFree(lpszOtherStuffW);
   }

   return(dwRet);
}

DWORD RegGetStringAndRealloc( HKEY hkey, LPCTSTR lpszValue, LPTSTR *lplpsz, LPDWORD lpSize )
{
    DWORD       err;
    DWORD       dwSize;
    DWORD       dwType;
    LPTSTR      lpszNew;

    *lplpsz[0] = TEXT('\0');        // In case of error

    dwSize = *lpSize;
    err = SHQueryValueEx(hkey, (LPTSTR)lpszValue, 0, &dwType,
                          (LPBYTE)*lplpsz, &dwSize);

    if (err == ERROR_MORE_DATA)
    {
        lpszNew = (LPTSTR)LocalReAlloc((HLOCAL)*lplpsz, dwSize, LMEM_MOVEABLE);

        if (lpszNew)
        {
            *lplpsz = lpszNew;
            *lpSize = dwSize;
            err = SHQueryValueEx(hkey, (LPTSTR)lpszValue, 0, &dwType,
                                  (LPBYTE)*lplpsz, &dwSize);
        }
    }
    return err;
}


// Some Static strings that we use to read from the registry
// const char c_szAboutCurrentBuild[] = "CurrentBuild";
const TCHAR c_szAboutRegisteredUser[] = TEXT("RegisteredOwner");
const TCHAR c_szAboutRegisteredOrganization[] = TEXT("RegisteredOrganization");
const TCHAR c_szAboutProductID[] = TEXT("ProductID");
const TCHAR c_szAboutOEMID[] = TEXT("OEMID");


void _InitAboutDlg(HWND hDlg, LPABOUT_PARAMS lpap)
{
    HKEY        hkey;
    TCHAR       szldK[16];
    TCHAR       szBuffer[64];
    TCHAR       szTemp[64];
    TCHAR       szTitle[64];
    TCHAR       szMessage[200];
    TCHAR       szNumBuf1[32];
    LPTSTR      lpTemp;
    LPTSTR      lpszValue = NULL;
    DWORD       cb;
    DWORD       err;

    /*
     * Display app title
     */

    // REVIEW Note the const ->nonconst cast here

    for (lpTemp = (LPTSTR)lpap->szApp; 1 ; lpTemp = CharNext(lpTemp))
    {
        if (*lpTemp == TEXT('\0'))
        {
            GetWindowText(hDlg, szBuffer, ARRAYSIZE(szBuffer));
            wsprintf(szTitle, szBuffer, (LPTSTR)lpap->szApp);
            SetWindowText(hDlg, szTitle);
            break;
        }
        if (*lpTemp == STRING_SEPARATOR)
        {
            *lpTemp++ = TEXT('\0');
            SetWindowText(hDlg, lpap->szApp);
            lpap->szApp = lpTemp;
            break;
        }
    }

    GetDlgItemText(hDlg, IDD_APPNAME, szBuffer, ARRAYSIZE(szBuffer));
    wsprintf(szTitle, szBuffer, lpap->szApp);
    SetDlgItemText(hDlg, IDD_APPNAME, szTitle);

    // other stuff goes here...

    SetDlgItemText(hDlg, IDD_OTHERSTUFF, lpap->szOtherStuff);

    SendDlgItemMessage(hDlg, IDD_ICON, STM_SETICON, (WPARAM)lpap->hIcon, 0L);
    if (!lpap->hIcon)
        ShowWindow(GetDlgItem(hDlg, IDD_ICON), SW_HIDE);

    GetDlgItemText(hDlg, IDD_COPYRIGHTSTRING, szTemp, ARRAYSIZE(szTemp));
    wnsprintf(szBuffer, ARRAYSIZE(szBuffer), szTemp, TEXT(VER_LEGALCOPYRIGHT_YEARS));
    SetDlgItemText(hDlg, IDD_COPYRIGHTSTRING, szBuffer);

    /*
     * Display memory statistics
     */
    {
        MEMORYSTATUSEX MemoryStatus;
        DWORDLONG ullTotalPhys;

        MemoryStatus.dwLength = sizeof(MEMORYSTATUSEX);
        GlobalMemoryStatusEx(&MemoryStatus);
        ullTotalPhys = MemoryStatus.ullTotalPhys;

        BytesToK(&ullTotalPhys);

        LoadString(HINST_THISDLL, IDS_LDK, szldK, ARRAYSIZE(szldK));
        wsprintf(szBuffer, szldK, AddCommas64(ullTotalPhys, szNumBuf1, ARRAYSIZE(szNumBuf1)));
        SetDlgItemText(hDlg, IDD_CONVENTIONAL, szBuffer);
    }

    // Lets get the version and user information from the registry
    if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, REG_SETUP, 0, KEY_READ, &hkey) == ERROR_SUCCESS)
    {
        cb = MAX_REG_VALUE;

        if (NULL != (lpszValue = (LPTSTR)LocalAlloc(LPTR, cb)))
        {
            /*
             * Determine version information
             */
            OSVERSIONINFO Win32VersionInformation;

            Win32VersionInformation.dwOSVersionInfoSize = sizeof(Win32VersionInformation);
            if (!GetVersionEx(&Win32VersionInformation))
            {
                Win32VersionInformation.dwMajorVersion = 0;
                Win32VersionInformation.dwMinorVersion = 0;
                Win32VersionInformation.dwBuildNumber  = 0;
                Win32VersionInformation.szCSDVersion[0] = TEXT('\0');
            }

            LoadString(HINST_THISDLL, IDS_VERSIONMSG, szBuffer, ARRAYSIZE(szBuffer));

            szTitle[0] = TEXT('\0');
            if (Win32VersionInformation.szCSDVersion[0] != TEXT('\0'))
            {
                wsprintf(szTitle, TEXT(": %s"), Win32VersionInformation.szCSDVersion);
            }

            // Extra Whistler code to get the VBL version info
            {
                DWORD dwSize;
                DWORD dwType;

                // save off the current szTitle string
                lstrcpy(szTemp, szTitle);

                dwSize = sizeof(szTitle);
                if ((SHGetValue(HKEY_LOCAL_MACHINE,
                                TEXT("Software\\Microsoft\\Windows NT\\CurrentVersion"),
                                TEXT("BuildLab"),
                                &dwType,
                                szTitle,
                                &dwSize) == ERROR_SUCCESS) && (dwType == REG_SZ))
                {
                    // Now szTitle contains the buildnumber in the format: "2204.reinerf.010700"
                    // Since we are sprintf'ing the buildnumber again below, we remove it first
                    memmove((void*)szTitle, (void*)&szTitle[4], (lstrlen(szTitle) + 1) * sizeof(TCHAR));
                    
                    if (szTemp[0] != TEXT('\0'))
                    {
                        // add back on the Service Pack version string
                        lstrcatn(szTitle, TEXT(" "), ARRAYSIZE(szTitle));
                        lstrcatn(szTitle, szTemp, ARRAYSIZE(szTitle));
                    }
                }
            }

            szNumBuf1[0] = TEXT('\0');
            if (GetSystemMetrics(SM_DEBUG))
            {
                szNumBuf1[0] = TEXT(' ');
                LoadString(HINST_THISDLL, IDS_DEBUG, &szNumBuf1[1], ARRAYSIZE(szNumBuf1) - 1);
            }
            wnsprintf(szMessage,
                      ARRAYSIZE(szMessage),
                      szBuffer,
                      Win32VersionInformation.dwMajorVersion,
                      Win32VersionInformation.dwMinorVersion,
                      Win32VersionInformation.dwBuildNumber,
                      (LPTSTR)szTitle,
                      (LPTSTR)szNumBuf1);
            SetDlgItemText(hDlg, IDD_VERSION, szMessage);

            /*
             * Display the User name.
             */
            err = RegGetStringAndRealloc(hkey, c_szAboutRegisteredUser, &lpszValue, &cb);
            if (!err)
                SetDlgItemText(hDlg, IDD_USERNAME, lpszValue);

            /*
             * Display the Organization name.
             */
            err = RegGetStringAndRealloc(hkey, c_szAboutRegisteredOrganization, &lpszValue, &cb);
            if (!err)
                SetDlgItemText(hDlg, IDD_COMPANYNAME, lpszValue);

            /*
             * Display the OEM or Product ID.
             */
            err = RegGetStringAndRealloc(hkey, c_szAboutOEMID, &lpszValue, &cb);
            if (!err)
            {
                /*
                 * We have an OEM ID, so hide the product ID controls,
                 * and display the text.
                 */
                ShowWindow (GetDlgItem(hDlg, IDD_PRODUCTID), SW_HIDE);
                ShowWindow (GetDlgItem(hDlg, IDD_SERIALNUM), SW_HIDE);
                SetDlgItemText(hDlg, IDD_OEMID, lpszValue);
            }
            else if (err == ERROR_FILE_NOT_FOUND)
            {
                /*
                 * OEM ID didn't exist, so look for the Product ID
                 */
                ShowWindow (GetDlgItem(hDlg, IDD_OEMID), SW_HIDE);
                err = RegGetStringAndRealloc(hkey, c_szAboutProductID, &lpszValue, &cb);
                if (!err)
                {
                    SetDlgItemText(hDlg, IDD_SERIALNUM, lpszValue);
                }
            }

            LocalFree(lpszValue);
        }

        RegCloseKey(hkey);
    }
}


BOOL_PTR CALLBACK AboutDlgProc(HWND hDlg, UINT wMsg, WPARAM wParam, LPARAM lParam)
{
    BOOL_PTR bReturn = TRUE;

    switch (wMsg)
    {
    case WM_INITDIALOG:
        _InitAboutDlg(hDlg, (LPABOUT_PARAMS)lParam);
        break;

    case WM_PAINT:
        {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hDlg, &ps);

            // We draw the product banner and a blue strip.  In order to support high DPI monitors
            // and scaled fonts we must scale the image and the strip to the proportions of the dialog.
            //
            // +-----------------------------+
            // | Product Banner (413x72)     |
            // |                             |
            // +-----------------------------+
            // | Blue Strip (413x5)          |
            // +-----------------------------+

            HDC hdcMem = CreateCompatibleDC(hdc);
            int cxDlg;

            {
                RECT rc;
                GetClientRect(hDlg, &rc);
                cxDlg = rc.right;
            }

            if (hdcMem)
            {
                BOOL fDeep = (SHGetCurColorRes() > 8);
                HBITMAP hbmBand, hbmAbout;
                int cxDest = MulDiv(413,cxDlg,413);
                int cyDest = MulDiv(72,cxDlg,413);
                UINT uID;
                UINT uXpSpLevel = 0;
                HMODULE hResourceDll = HINST_THISDLL;

                if (IsOS(OS_PERSONAL))
                {
                    uID = (fDeep ? IDB_ABOUTPERSONAL256 : IDB_ABOUTPERSONAL16);
                }
#ifndef _WIN64
                else if (IsOS(OS_EMBEDDED))
                {
                    uID = (fDeep ? IDB_ABOUTEMBEDDED256 : IDB_ABOUTEMBEDDED16);
                }
                else if (IsOS(OS_TABLETPC))
                {
                    uXpSpLevel = 1;
                    uID = (fDeep ? IDB_ABOUTTABLETPC256_SHELL32_DLL : IDB_ABOUTTABLETPC16_SHELL32_DLL);
                }
                else if (IsOS(OS_MEDIACENTER))
                {
                    uXpSpLevel = 1;
                    uID = (fDeep ? IDB_ABOUTMEDIACENTER256_SHELL32_DLL : IDB_ABOUTMEDIACENTER16_SHELL32_DLL);
                }
#endif // !_WIN64
                else
                {
                    uID = (fDeep ? IDB_ABOUT256 : IDB_ABOUT16);
                }

                // If this bitmap was added for a Windows XP service pack,
                // and lives in a special resource DLL, attempt to load it
                // now. If this fails, revert to the Professional bitmaps.
                
                if (uXpSpLevel > 0)
                {
                    hResourceDll = LoadLibraryEx(TEXT("winbrand.dll"),
                                                 NULL,
                                                 LOAD_LIBRARY_AS_DATAFILE);

                    if (hResourceDll == NULL)
                    {
                        hResourceDll = HINST_THISDLL;
                        uID = (fDeep ? IDB_ABOUT256 : IDB_ABOUT16);
                    }
                }
                            
                // paint the bitmap for the windows product

                hbmAbout = LoadImage(hResourceDll,
                                     MAKEINTRESOURCE(uID),
                                     IMAGE_BITMAP, 
                                     0, 0, 
                                     LR_LOADMAP3DCOLORS);
                            
                if (hResourceDll != HINST_THISDLL)
                {
                    FreeLibrary(hResourceDll);
                }
                
                if ( hbmAbout )
                {
                    HBITMAP hbmOld = SelectObject(hdcMem, hbmAbout);
                    if (hbmOld)
                    {
                        StretchBlt(hdc, 0, 0, cxDest, cyDest, hdcMem, 0,0,413,72, SRCCOPY);
                        SelectObject(hdcMem, hbmOld);
                    }
                    DeleteObject(hbmAbout);
                }

                // paint the blue band below it

                hbmBand = LoadImage(HINST_THISDLL,  
                                    MAKEINTRESOURCE(fDeep ? IDB_ABOUTBAND256:IDB_ABOUTBAND16),
                                    IMAGE_BITMAP, 
                                    0, 0, 
                                    LR_LOADMAP3DCOLORS);
                if ( hbmBand )
                {
                    HBITMAP hbmOld = SelectObject(hdcMem, hbmBand);
                    if (hbmOld)
                    {
                        StretchBlt(hdc, 0, cyDest, cxDest, MulDiv(5,cxDlg,413), hdcMem, 0,0,413,5, SRCCOPY);
                        SelectObject(hdcMem, hbmOld);
                    }
                    DeleteObject(hbmBand);
                }

                DeleteDC(hdcMem);
            }

            EndPaint(hDlg, &ps);
            break;
        }

    case WM_COMMAND:
        EndDialog(hDlg, TRUE);
        break;

    case WM_NOTIFY:
        if ((IDD_EULA == (int)wParam) &&
            (NM_CLICK == ((LPNMHDR)lParam)->code))
        {
            SHELLEXECUTEINFO sei = { 0 };
            sei.cbSize = sizeof(SHELLEXECUTEINFO);
            sei.fMask = SEE_MASK_DOENVSUBST;
            sei.hwnd = hDlg;
            sei.nShow = SW_SHOWNORMAL;
            sei.lpFile = TEXT("%windir%\\system32\\eula.txt");

            ShellExecuteEx(&sei);
        }
        else
        {
            // WM_NOTIFY not handled.
            bReturn = FALSE;
        }
        break;

    default:
        // Not handled.
        bReturn = FALSE;
    }
    return bReturn;
}