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Added filter execution code

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This commit is contained in:
Matthias Neeracher 2007-08-22 18:27:40 +00:00
parent 27ece282be
commit ffaa1f8343
1 changed files with 50 additions and 3 deletions
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51
Sources/VLPListDocument.mm
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@ -198,7 +198,38 @@ void VLPlistVisitor::VisitChord(VLChord & c)
- (NSData *)runFilter:(NSString *)filterName withContents:(NSData *)contents
{
return nil;
NSString * filterPath = [[NSBundle mainBundle] pathForResource:filterName
ofType:nil
inDirectory:@"Filters"];
NSPipe * filterInput = [NSPipe pipe];
NSPipe * filterOutput = [NSPipe pipe];
NSPipe * filterError = [NSPipe pipe];
NSTask * filterTask = [[NSTask alloc] init];
[filterTask setLaunchPath:filterPath];
[filterTask setStandardInput:filterInput];
[filterTask setStandardOutput:filterOutput];
[filterTask setStandardError:filterError];
[filterTask launch];
NSFileHandle * inputHandle = [filterInput fileHandleForWriting];
[inputHandle writeData:contents];
[inputHandle closeFile];
NSFileHandle * outputHandle = [filterOutput fileHandleForReading];
NSData * output = [outputHandle readDataToEndOfFile];
NSFileHandle * errorHandle = [filterError fileHandleForReading];
NSData * error = [errorHandle readDataToEndOfFile];
[filterTask waitUntilExit];
[filterTask release];
if ([error length])
[NSException raise:NSInvalidArgumentException
format:@"Filter %@: %@", filterName, error];
return output;
}
- (NSFileWrapper *)fileWrapperWithFilter:(NSString *)filterName
@ -209,7 +240,11 @@ void VLPlistVisitor::VisitChord(VLChord & c)
ofType:@"pwriter" inDirectory:@"Filters"] != nil;
filterName = [filterName stringByAppendingPathExtension:
perfOrder ? @"pwriter" : @"writer"];
NSData * inData = [self plistInPerformanceOrder:perfOrder];
id inPlist= [self plistInPerformanceOrder:perfOrder];
NSData * inData =
[NSPropertyListSerialization dataFromPropertyList:inPlist
format:NSPropertyListXMLFormat_v1_0
errorDescription:nil];
NSData * outData= [self runFilter:filterName withContents:inData];
return [[[NSFileWrapper alloc] initRegularFileWithContents:outData]
@ -220,7 +255,19 @@ void VLPlistVisitor::VisitChord(VLChord & c)
withFilter:(NSString *)filterName
error:(NSError **)outError
{
filterName = [filterName stringByAppendingPathExtension:@"reader"];
NSData * inData = [wrapper regularFileContents];
NSData * outData = [self runFilter:filterName withContents:inData];
NSString*errString;
id outPlist =
[NSPropertyListSerialization propertyListFromData:outData
mutabilityOption:NSPropertyListImmutable
format:NULL errorDescription:&errString];
if (!outPlist)
return NO;
else
return [self readFromPlist:outPlist error:outError];
}
@end