sdlogtask.m

处理WORD文档的

/* SDLogTask.m created by andrew on Thu 30-Apr-1998 */

#import "SDLogTask.h"

// kudos to [e-mail] for helping me fix IO:
#import "NSFileHandle_CFRNonBlockingIO.h"

//
// If you want notification when the task completes
// implement this method in the "owner" class
//

@interface NSObject(SDLogTask_Delegate)
- (void)taskTerminated:(BOOL)success;
@end

@implementation SDLogTask

- (void)dealloc
{
	if (outFile) [outFile release];
	[super dealloc];
}
//
// Methods to make it easy to spew feedback to user:
//

#define END_RANGE NSMakeRange([[tv string]length],0)
+ (void)appendString:(NSString *)string toText:(NSTextView *)tv newLine:(BOOL)newLine;
{
        [tv replaceCharactersInRange:END_RANGE withString:string];
        if (newLine)
                [tv replaceCharactersInRange:END_RANGE withString:@"\n"];
        else
                [tv replaceCharactersInRange:END_RANGE withString:@" "];

        if ([[tv window] isVisible]) {
                [tv scrollRangeToVisible:END_RANGE];
        }
}

- (void)appendString:(NSString *)string newLine:(BOOL)newLine
{
    [[self class] appendString:string toText:logText newLine:newLine];
 }

- (void)outputData:(NSData *)data
{
	[self appendString:[[[NSString alloc]initWithData:data encoding:[NSString defaultCStringEncoding]]autorelease] newLine:YES];
}


- (void) processAvailableData;
{
	NSData *data;
	BOOL dataProcessed;
NS_DURING
	dataProcessed = NO;
	data = [standardErrorHandle availableDataNonBlocking];
	if ( (data != nil) && ([data length] != 0) ) {
		[self outputData:data];
		dataProcessed = YES;
	}
NS_HANDLER
	dataProcessed = NO;
NS_ENDHANDLER

NS_DURING

	if (includeStandardOutput) {
		data = [standardOutputHandle availableDataNonBlocking];
		if ( (data != nil) && ([data length] != 0) ) {
			[self outputData:data];
			dataProcessed = YES;
		}
	}
NS_HANDLER
        dataProcessed = NO;
NS_ENDHANDLER


	if ([task isRunning] == YES) {
		if (dataProcessed == YES)
			[self performSelector: @selector(processAvailableData)
				withObject: nil afterDelay: .1];
        else
		[self performSelector: @selector(processAvailableData)
				withObject: nil afterDelay: 2.5];
	}
}


- (void) outputInfoAtStart:(NSString *)pathToExe args:(NSArray *)args
{
	int i;
	// clear it out from last time:
	//[logText setString:@""];

	[self appendString:pathToExe newLine:NO];
	for (i = 0; i < [args count]; i++)
		[self appendString:[args objectAtIndex:i] newLine:NO];
	[self appendString:@"\n" newLine:YES];
}

- initAndLaunchWithArgs:(NSArray *)args executable:(NSString *)pathToExe directory:(NSString *)dir logToText:(NSTextView *)text includeStandardOutput:(BOOL)includeStandardOut outFile:(NSString *)anOutFile owner:anOwner environment:(NSDictionary *)environment
{

	[super init];
	logText = text;
        includeStandardOutput = includeStandardOut;
        outFile = [anOutFile copy];
	owner = anOwner;

	standardErrorPipe = [NSPipe pipe];
	standardErrorHandle =  [standardErrorPipe fileHandleForReading];

        if ((outFile!=nil) && ![outFile isEqualToString:@""]) {
            [[NSFileManager defaultManager] removeFileAtPath:outFile  handler:nil];
            if ([[NSFileManager defaultManager] createFileAtPath:outFile  contents:[NSData data] attributes:nil])
            outputFileHandle = [NSFileHandle fileHandleForWritingAtPath:outFile];
            else {
                NSLog(@"Cannot open %@! Aborting...",outFile);
                if ([owner respondsToSelector:@selector(taskTerminated:)])
                        [owner taskTerminated:0];
		return nil;
            }
        }else if (includeStandardOutput) {
            standardOutputPipe = [NSPipe pipe];
            standardOutputHandle =   [standardOutputPipe fileHandleForReading];
        } 
	task = [[NSTask alloc] init];

        [task setArguments:args];
	[task setCurrentDirectoryPath:dir];
        [task setLaunchPath:pathToExe];

	[task setStandardError:standardErrorPipe];

	if (environment != nil) [task setEnvironment:environment];

        if (outputFileHandle != nil) [task setStandardOutput:outputFileHandle];
	else if (includeStandardOutput) [task setStandardOutput:standardOutputPipe];

        [self outputInfoAtStart:pathToExe args:args];


	[self performSelector: @selector(processAvailableData) withObject: nil afterDelay: 1.0];
	
	// HERE WE GO: spin off a thread to do this:
	[task launch];

	[[NSNotificationCenter defaultCenter]
		addObserver: self
		selector: @selector(checkATaskStatus:)
		name: NSTaskDidTerminateNotification
		object: task];
	return self;
}

#define TASK_SUCCEEDED NSLocalizedStringFromTable(@"Job SUCCEEDED!\n", @"DOC", "message when task is successful")

#define TASK_FAILED NSLocalizedStringFromTable(@"Job FAILED!\nPlease see log.", @"DOC", "when the task fails...")


- (void)checkATaskStatus:(NSNotification *)aNotification
{
	int status = [[aNotification object] terminationStatus];
	if (status == 0 /* STANDARD SILLY UNIX RETURN VALUE */) {
		[self appendString:TASK_SUCCEEDED newLine:YES];
	}   else {
		[self appendString:TASK_FAILED newLine:YES];
		[[logText window] orderFront:self];
	}
        if (outputFileHandle != nil)
		[outputFileHandle release]; 	// this will close it according to docs

	if ([owner respondsToSelector:@selector(taskTerminated:)])
		[owner taskTerminated:(status == 0)];
}

@end