I don't know know if there's a better way, but I call my selection-
fixing code in -selectionRangeForProposedRange:granularity:, and also
in the following NSTextView overrides if the selected range length is
0 (if it's not zero, presumably it's already been fixed by -
selectionRangeForProposedRange:granularity:):
textView:willChangeSelectionFromCharacterRanges:toCharacterRanges:
(delegate method)
deleteForward:
deleteBackward:
deleteWordForward:
deleteWordBackward:
deleteBackwardByDecomposingPreviousCharacter:
deleteToEndOfParagraph:
I wouldn't mess with rangeForUserTextChange; I'm sure it knows more
about unicode normalization forms, etc., than I do.
Ross
On Feb 4, 2009, at 8:09 AM, Chris Idou wrote:
That didn't seem to help. I tried overriding selectedRanges, and
that makes you delete the whole range when you are clicked in it
(good), but nothing seems to help the case of trying to simply
backspace from the end of the range. In this case the selected range
is not relevant because you are not inside the range yet as far as
the existing range, and you can't predict in advance the user
intends to backspace into it, and for the same reason, neither is
the rangeForUserTextChange.
On Feb 3, 2009, at 5:24 PM, Chris Idou wrote:
So I want it that if you try and delete any character that is part
of a token, it deletes the entire token.
So I'm overriding rangeForUserTextChange to return a different
range if the current range includes any part of a token.
This seems to work if the user tries to type in any part. For
example, clicking on the token and pressing space bar or a letter.
However, it doesn't work if you press backspace or delete, even
though rangeForUserTextChange is still called.
I don't think you really want to override that method. Instead
override -[NSTextView selectionRangeForProposedRange:granularity:]
which should be called for every selection the user makes.
~Martin
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