nsfilemanager-extensions.m

处理WORD文档的

/* NSFileManager_Extensions.m created by andrew on Tue 18-Aug-1998 */

#import "NSFileManager-Extensions.h"

@implementation NSFileManager(NSFileManager_Extensions)


#define FILE_OPERATION_ERROR NSLocalizedStringFromTable(@"File operation error: %@ with file: %@", @"DOC", "alert message on failed file operation")

#define PROCEED NSLocalizedStringFromTable(@"Proceed", @"DOC", "msg when you cannot rename a file")
#define STOP NSLocalizedStringFromTable(@"Stop", @"DOC", "msg when you cannot rename a file")


- (BOOL)fileManager:(NSFileManager *)manager
       shouldProceedAfterError:(NSDictionary *)errorDict
{
        int result;
        result = NSRunAlertPanel([[NSProcessInfo processInfo] processName],
                FILE_OPERATION_ERROR,PROCEED, STOP, NULL,
                [errorDict objectForKey:@"Error"],
                [errorDict objectForKey:@"Path"]);

        if (result == NSAlertDefaultReturn)
                return YES;
        else
                return NO;
}

//
// Temporary Directory stuff: useful code.
//

BOOL directoryOK(NSString *path)
{
       BOOL isDirectory;
       NSFileManager *fileManager = [NSFileManager defaultManager];
       if (![fileManager fileExistsAtPath:path isDirectory:&isDirectory] || !isDirectory) {
               NSDictionary *dict = [NSDictionary dictionaryWithObject:
                       [NSNumber numberWithUnsignedLong:0777]
                       forKey:NSFilePosixPermissions];
               if (![fileManager createDirectoryAtPath:path attributes:dict]) 
                       return NO;
       }
       return YES;
}

NSString * existingPath(NSString *path)
{
       while (path && ![path isEqualToString:@""]
               && ![[NSFileManager defaultManager] fileExistsAtPath:path])
               path = [path stringByDeletingLastPathComponent];
       return path;	
}

NSArray *directoriesToAdd(NSString *path, NSString *existing)
{
       NSMutableArray *a = [NSMutableArray arrayWithCapacity:4];
       if (path != nil && existing != nil) {
               while (![path isEqualToString:existing]) {
                       [a insertObject:[path lastPathComponent] atIndex:0];
                       path = [path stringByDeletingLastPathComponent];
               }
       }
       return a;
}

// this will go up the path until it finds an existing directory
// and will add each subpath and return YES if succeeds, NO if fails:

- (BOOL)createWritableDirectory:(NSString *)path
{
       BOOL isDirectory;
       NSFileManager *fileManager = [NSFileManager defaultManager];
       if ([fileManager fileExistsAtPath:path isDirectory:&isDirectory]
               && isDirectory && [fileManager isWritableFileAtPath:path])
               return YES; // no work to do
       else {
               NSString *existing = existingPath(path);
               NSArray *dirsToAdd = directoriesToAdd(path,existing);
               int i;
               BOOL good = YES;
               for (i = 0; i < [dirsToAdd count]; i++) {
                       existing = [existing stringByAppendingPathComponent:
                               [dirsToAdd objectAtIndex:i]];
                       if (!directoryOK(existing)) {
                               good = NO;
                               break;
                       }
               }
               return good;
       }
}


- (NSString *)nextUniqueNameUsing:(NSString *)templatier
{
    if (![[NSFileManager defaultManager] fileExistsAtPath:templatier])
	return templatier;
    else {
      int unique = 1;
       NSString *tempName = nil;
       do {
               tempName =[NSString stringWithFormat:@"%@_%d.%@",
               [templatier stringByDeletingPathExtension],++unique,
               [templatier pathExtension]];
       } while ([[NSFileManager defaultManager] fileExistsAtPath:tempName]);

       return tempName;
    }
}

- (NSString *)temporaryDirectory
{
    static NSString *tempDir =nil;
    NSString *s = [[NSUserDefaults standardUserDefaults]  stringForKey:UserTemporaryDirectory];

    if (tempDir == nil  || (NOT_NULL(s) && ![tempDir isEqualToString:s])) {

        if (NOT_NULL(s)) tempDir = [s retain];
	else tempDir =[[NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@-%@",[[NSProcessInfo processInfo] processName],NSUserName()]] retain];
    }

    if (! [self createWritableDirectory:tempDir]) {
               NSLog(@"Couldn't create %@, using %@",tempDir,
                       NSTemporaryDirectory());
               tempDir = NSTemporaryDirectory();
    }
    return tempDir;
}


@end