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bug#25818: 25.2; frame moved off display does not return (OS X)

From: Charles A. Roelli
Subject: bug#25818: 25.2; frame moved off display does not return (OS X)
Date: Thu, 27 Apr 2017 21:14:05 +0200
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:45.0) Gecko/20100101 Thunderbird/45.8.0

Hi Anders,

As discussed off-list, the copyright assignment is done.

I fixed the patch so that child frames are never constrained (after some testing, it seems that a child frame cannot get stuck off screen as long as its parent is still visible). To test this out, evaluate the following from emacs -Q,

  (setq test-frame (make-frame `((parent-frame . ,(selected-frame)))))
  (set-frame-position test-frame 0 500))

and drag the parent frame down until its child is off screen. When the parent is moved back up, the child should reappear with it. (Assuming Spaces is off; not sure what would happen in OS X 10.9+ in this case when Spaces is on... I guess the child would be constrained before it is placed off screen?).

I've also CC'ed Alan since this change is related to the new frame parameters.



Attachment: 0001-Constrain-non-child-frames-to-screen-area-in-OS-X.patch
Description: Text Data

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