Re: invisible

[martin rudalics <rudalics@gmx.at>]

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 > It's the same as before: C-p skips lines 5 and 3 with rear-nonsticky
 > nil, does not skip with rear-nonsticky t, and (forward-line -1) does not
 > skip regardless of rear-nonstickiness.  I tested on GNU Emacs 23.0.50.1
 > (i686-pc-linux-gnu, GTK+ Version 2.12.0) of 2007-11-21.  Could the
 > differences between what you and I see be related to the EOL difference
 > between MS Windows and Unix?  Can other users of these systems who are
 > following this thread try these tests and report their observations?

Hmmm... I think I see why you don't see it.  With emacs -Q visit the
attached file, evaluate fl-1 and the first progn, move point before
line7 and do M-x fl-1 twice.  Undo the changes, evaluate the second
progn and do the same movement again.  Can you see the difference now?

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line1
line2
line3
line4
line5
line6
line7

(defun fl-1 ()
  (interactive)
  (forward-line -1))

(progn
  (add-text-properties 12 13 '(invisible t))
  (add-text-properties 18 19 '(invisible t))
  (add-text-properties 24 25 '(invisible t))
  (add-text-properties 30 31 '(invisible t))
  (setq line-move-ignore-invisible nil))

(progn
  (add-text-properties 12 13 '(invisible t rear-nonsticky t))
  (add-text-properties 18 19 '(invisible t rear-nonsticky t))
  (add-text-properties 24 25 '(invisible t rear-nonsticky t))
  (add-text-properties 30 31 '(invisible t rear-nonsticky t))
  (setq line-move-ignore-invisible nil))

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