[R-SIG-Mac] suggestion to fix undo behaviour in R.app's console

[Hans-Jörg Bibiko]

Dear Simon, dear all,

here is my tiny suggestion to improve the undo behaviour in R's  
console after auto-pairing "" () etc.:

In RTextView.m around line 208 (Mac-GUI-1.27):

case '\'':
	if (!complement) {
		complement = @"\'";
		acCheck = YES;
		if ([self parserContextForPosition:r.location] != pcExpression) break;
	}

	// register the next pairing procedure to the undo manager better
	[self shouldChangeTextInRange:[self selectedRange]  
replacementString:complement];

	SLog(@"RTextView: open bracket chracter %c", ck);
	[super keyDown:theEvent];
	{
		r = [self selectedRange];
		if (r.location != NSNotFound) {


[self shouldChangeTextInRange:[self selectedRange]  
replacementString:complement];
will register the next changes a bit better.
The return value of that function is ignored but it could be used as:

if([self shouldChangeTextInRange:[self selectedRange]  
replacementString:complement])
... do it
else
... print error - not editable


Cheers,

--Hans



**********************************************************
Hans-Joerg Bibiko
Max Planck Institute for Evolutionary Anthropology
Department of Linguistics
Deutscher Platz 6     phone:   +49 (0) 341 3550 341
D-04103 Leipzig       fax:     +49 (0) 341 3550 333
Germany               e-mail:  bibiko at eva.mpg.de