NSTextView undo doesn't work for attributes?
NSTextView undo doesn't work for attributes?
- Subject: NSTextView undo doesn't work for attributes?
- From: Keith Blount <email@hidden>
- Date: Fri, 1 Apr 2005 12:56:47 -0800 (PST)
- Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys
Hello,
I am trying to programmatically add some attributed to
a text view like this:
NSAttributedString *attrStr = [[NSAttributedString
alloc] initWithString:string attributes:attribs];
[self shouldChangeTextInRange:selRange
replacementString:string];
[[self textStorage] replaceCharactersInRange:selRange
withAttributedString:attrStr];
[self didChangeText];
[attrStr release];
attribs is a dictionary that contains indenting in the
NSParagraphStyle attribute. Everything is called here
to set up undo, and yet undo fails to undo the
attributes. So if I use the above code and then hit
undo, the text attributes aren't restored to their
original state - they stay as they were set by
attribs.
Why aren't attributes undone? How can I make it so
that they are?
I tried separating the code into two stages: first I
replaced the string, and then I applied the attributes
using textStorage's addAttributes:range: - this worked
the first time I called undo (attributes were reset),
but if I call redo and undo again, again the
attributes are not reset.
Am I missing something? Surely NSTextView's
shouldChangeTextInRange:replacementString: and
didChangeText: should handle the undo for the whole
attributed string, not just the string part?
Many thanks for any pointers on what I am missing,
Keith
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