405 lines
8.8 KiB
C
405 lines
8.8 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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All rights reserved
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Module Name:
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devmode.c
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Abstract:
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Handles per-user devmode implementation.
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Author:
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Environment:
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User Mode -Win32
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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#include "client.h"
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/********************************************************************
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Forward prototypes
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********************************************************************/
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LPWSTR
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FormatPrinterForRegistryKey(
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LPWSTR pSource,
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LPWSTR pScratch
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);
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BOOL
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bGetDevModeLocation(
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IN PSPOOL pSpool,
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OUT PHKEY phKey,
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OUT LPCWSTR *ppszValue
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);
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const WCHAR gszPrinterConnections[] = L"Printers\\Connections\\";
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const WCHAR gszDevMode[] = L"DevMode";
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const WCHAR gszDevModePerUserLocal[] = L"Printers\\DevModePerUser";
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/********************************************************************
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Public functions
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********************************************************************/
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BOOL
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bSetDevModePerUser(
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PSPOOL pSpool,
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PDEVMODE pDevMode
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)
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/*++
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Routine Description:
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Sets the per-user DevMode in HKCU.
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Arguments:
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pSpool - Printer to set.
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pDevMode - DevMode to save. If NULL, deletes value.
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Return Value:
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TRUE - Success
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FALSE - Failure
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--*/
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{
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HKEY hKey = NULL;
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BOOL bReturn = FALSE;
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LPWSTR pszValue = NULL;
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DWORD dwStatus = ERROR_SUCCESS;
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//
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// Retrieve the location of the DevMode.
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//
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bReturn = bGetDevModeLocation( pSpool,
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&hKey,
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&pszValue );
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if( bReturn ){
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if( !pDevMode ){
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//
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// NULL, so delete the value.
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//
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dwStatus = RegDeleteValue( hKey, pszValue );
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} else {
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dwStatus = RegSetValueEx( hKey,
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pszValue,
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0,
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REG_BINARY,
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(PBYTE)pDevMode,
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pDevMode->dmSize +
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pDevMode->dmDriverExtra );
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}
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RegCloseKey( hKey );
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}
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if( dwStatus != ERROR_SUCCESS ){
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SetLastError( dwStatus );
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bReturn = FALSE;
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}
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return bReturn;
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}
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BOOL
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bGetDevModePerUser(
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PSPOOL pSpool,
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PDEVMODE *ppDevMode
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)
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/*++
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Routine Description:
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Retrieves the per-user DevMode based on the current user.
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Arguments:
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pSpool - Printer to use.
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ppDevMode - Receives pointer to devmode. Must be freed by callee.
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Return Value:
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TRUE - Success: able to check if per-user DevMode exists. *ppDevMode
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is NULL if no per-user DevMode is there. (TRUE does not indicate
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that a per-user DevMode was found, only that we successfully checked.)
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FALSE - Failure.
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--*/
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{
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HKEY hKey = NULL;
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BOOL bReturn = FALSE;
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LPWSTR pszValue = NULL;
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LONG Status = ERROR_SUCCESS;
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*ppDevMode = NULL;
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//
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// Retrieve the location of the DevMode.
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//
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if( bGetDevModeLocation( pSpool,
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&hKey,
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&pszValue )){
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DWORD cbDevModePerUser;
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//
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// Key exists. See if we can read it and get the per-user DevMode.
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//
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Status = RegQueryInfoKey( hKey,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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&cbDevModePerUser,
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NULL,
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NULL );
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if( Status == ERROR_SUCCESS ){
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*ppDevMode = AllocSplMem( cbDevModePerUser );
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if( *ppDevMode ){
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Status = RegQueryValueEx( hKey,
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pszValue,
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NULL,
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NULL,
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(PBYTE)*ppDevMode,
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&cbDevModePerUser );
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if( Status == ERROR_SUCCESS ){
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bReturn = TRUE;
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}
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}
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if( !bReturn ){
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FreeSplMem( *ppDevMode );
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*ppDevMode = NULL;
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}
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//
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// Allow ERROR_FILE_NOT_FOUND to return success. *ppDevMode
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// is still NULL, but we return TRUE to indicate that we
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// successfully checked the registry--we just didn't find one.
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//
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if( Status == ERROR_FILE_NOT_FOUND ){
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bReturn = TRUE;
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}
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}
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RegCloseKey( hKey );
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}
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if( !bReturn ){
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SetLastError( Status );
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}
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return bReturn;
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}
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BOOL
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bCompatibleDevMode(
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PSPOOL pSpool,
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PDEVMODE pDevModeBase,
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PDEVMODE pDevModeNew
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)
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/*++
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Routine Description:
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Check if two DevModes are compatible (e.g., they can be used
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interchangably).
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This is done by checking size and version information. Not
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foolproof, but the best we can do since we can't look at private
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information.
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Arguments:
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pSpool - Printer to check.
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pDevModeBase - Known good DevMode.
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pDevModeNew - DevMode to check.
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Return Value:
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TRUE - Appears compatible.
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FALSE - Not compatible.
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--*/
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{
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if( !pDevModeBase || ! pDevModeNew ){
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return FALSE;
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}
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return pDevModeBase->dmSize == pDevModeNew->dmSize &&
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pDevModeBase->dmDriverExtra == pDevModeNew->dmDriverExtra &&
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pDevModeBase->dmSpecVersion == pDevModeNew->dmSpecVersion &&
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pDevModeBase->dmDriverVersion == pDevModeNew->dmDriverVersion;
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}
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/********************************************************************
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Support Functions
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********************************************************************/
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LPWSTR
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FormatPrinterForRegistryKey(
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LPWSTR pSource,
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LPWSTR pScratch
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)
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{
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if (pScratch != pSource) {
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//
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// Copy the string into the scratch buffer:
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//
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wcscpy(pScratch, pSource);
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}
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//
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// Check each character, and, if it's a backslash,
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// convert it to a comma:
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//
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for (pSource = pScratch; *pSource; pSource++) {
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if (*pSource == L'\\')
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*pSource = L',';
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}
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return pScratch;
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}
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BOOL
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bGetDevModeLocation(
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IN PSPOOL pSpool,
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OUT PHKEY phKey,
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OUT LPCWSTR *ppszValue
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)
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/*++
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Routine Description:
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Retrieves the location of the per-user DevMode.
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On success, caller is responsible for closing phKey. ppszValue's
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life is dependent on pSpool.
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Arguments:
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pSpool - Printer to use.
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phKey - Receives R/W key of per-user DevMode. On success, this
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must be closed by caller.
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ppszValue - Receives value of per-user DevMode (where to read/write).
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Return Value:
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TRUE - Success
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FALSE - Failure, LastError set.
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--*/
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{
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WCHAR szPrinterScratch[MAX_PRINTER_NAME + COUNTOF( gszPrinterConnections )];
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BOOL bReturn = FALSE;
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DWORD dwError = ERROR_SUCCESS;
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//
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// If it starts with two backslashes, it may be either a connection
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// or a masq printer.
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//
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if( pSpool->pszPrinter[0] == L'\\' && pSpool->pszPrinter[1] == L'\\' ){
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//
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// Query the registry for pSpool->pszPrinter and look for DevMode.
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// First look at the HKCU:Printer\Connections.
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//
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wcscpy( szPrinterScratch, gszPrinterConnections );
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FormatPrinterForRegistryKey(
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pSpool->pszPrinter,
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&szPrinterScratch[ COUNTOF( gszPrinterConnections )-1] );
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dwError = RegOpenKeyEx( HKEY_CURRENT_USER,
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szPrinterScratch,
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0,
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KEY_READ | KEY_WRITE,
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phKey );
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if( dwError == ERROR_SUCCESS ){
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*ppszValue = gszDevMode;
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bReturn = TRUE;
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}
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}
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if( !bReturn ){
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DWORD dwIgnore;
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//
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// Not a connection or didn't exist in the connections key.
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// Look in the Printers\DevModePerUser key.
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//
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dwError = RegCreateKeyEx( HKEY_CURRENT_USER,
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gszDevModePerUserLocal,
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0,
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NULL,
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0,
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KEY_READ | KEY_WRITE,
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NULL,
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phKey,
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&dwIgnore );
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if( dwError == ERROR_SUCCESS ){
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*ppszValue = pSpool->pszPrinter;
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bReturn = TRUE;
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}
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}
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if( !bReturn ){
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SetLastError( dwError );
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}
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return bReturn;
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}
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