CWE-ou-minkata/Sources/Tools/plResBrowser/plWinRegistryTools.cpp

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*==LICENSE==*/
//////////////////////////////////////////////////////////////////////////////
//
//  plWinRegistryTools
//  Utility class for doing various usefull things in Win32
//  Written by Mathew Burrack
//  4.23.2002
//
//////////////////////////////////////////////////////////////////////////////

#include "HeadSpin.h"
#include "plWinRegistryTools.h"



//////////////////////////////////////////////////////////////////////////////
//// Static Utility Functions ////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

//// ISetRegKey //////////////////////////////////////////////////////////////
//  Sets the given registry key to the given string value. If valueName = nil,
//  sets the (default) value

static bool     ISetRegKey( const char *keyName, const char *value, const char *valueName = nil )
{
    HKEY    regKey;
    DWORD   result;


    // Create the key (just opens if it already exists)
    if( ::RegCreateKeyEx( HKEY_CLASSES_ROOT, keyName, 0, nil, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS,
                            nil, &regKey, &result ) != ERROR_SUCCESS )
    {
        hsStatusMessageF( "Warning: Registry database open failed for key '%s'.\n", keyName );
        return false;
    }

    // Assign the "default" subkey value
    LONG lResult = ::RegSetValueEx( regKey, valueName, 0, REG_SZ, (const BYTE *)value, ( lstrlen( value ) + 1 ) * sizeof( TCHAR ) );
    
    if( ::RegCloseKey( regKey ) == ERROR_SUCCESS && lResult == ERROR_SUCCESS )
        return true;

    hsStatusMessageF( "Warning: Registry database update failed for key '%s'.\n", keyName );
    return false;
}

//////////////////////////////////////////////////////////////////////////////
//// Public Utility Functions ////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////

//// AssociateFileType ///////////////////////////////////////////////////////
//  Associates a given file type in the Win32 registry with the given 
//  application. Also assigns a default icon if iconIndex != -1
//
//  To do this, we create a set of keys in the registry under CLASSES_ROOT that
//  looks like this:
//      fileTypeID  (value = fileTypeName)
//          |
//          |--- DefaultIcon (value = path,index) [omit this one if you don't 
//          |                                      want a default icon]
//          |
//          |--- shell
//                 |
//                 |--- open
//                        |
//                        |--- command (value = command line)
//

bool    plWinRegistryTools::AssociateFileType( const char *fileTypeID, const char *fileTypeName, const char *appPath, int iconIndex )
{
    char        keyName[ 512 ], keyValue[ 512 ];


    // Root key
    if( !ISetRegKey( fileTypeID, fileTypeName ) )
        return false;

    // DefaultIcon key, if we want one
    if( iconIndex != -1 )
    {
        sprintf( keyName, "%s\\DefaultIcon", fileTypeID );
        sprintf( keyValue, "%s,%d", appPath, iconIndex );
        if( !ISetRegKey( keyName, keyValue ) )
            return false;
    }

    // shell/open/command key
    sprintf( keyName, "%s\\shell\\open\\command", fileTypeID );
    sprintf( keyValue, "\"%s\" \"%%1\"", appPath );
    if( !ISetRegKey( keyName, keyValue ) )
        return false;

    // Success!
    return true;
}

//// AssociateFileExtension //////////////////////////////////////////////////
//  Assigns a given file extension to a previously registered Win32 file type 
//  (using the above function)
//
//  We do this by creating a key entry under CLASSES_ROOT of the following 
//  structure:
//
//          fileExtension (value = fileTypeID)
//
//  where fileExtension includes the leading . and fileTypeID is the same
//  typeID registered with the above function

bool    plWinRegistryTools::AssociateFileExtension( const char *fileExtension, const char *fileTypeID )
{
    return ISetRegKey( fileExtension, fileTypeID ); 
}

//// GetCurrentFileExtensionAssociation //////////////////////////////////////
//  Obtains the current fileTypeID associated with the given file extension,
//  or a null string if it isn't yet associated.

bool    plWinRegistryTools::GetCurrentFileExtensionAssociation( const char *extension, char *buffer, int bufferLen )
{
    long    dataLen;


    buffer[ 0 ] = 0;
    dataLen = bufferLen;

    LONG retVal = ::RegQueryValue( HKEY_CLASSES_ROOT, extension, buffer, &dataLen );
    if( retVal != ERROR_SUCCESS )
    {
        char msg[ 512 ];
        FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM, 0, retVal, 0, msg, sizeof( msg ), nil );
        hsStatusMessageF( "Error querying registry key '%s' : %s\n", extension, msg );
        return false;
    }

    return true;
}