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#cut#clipboard#paste#undo#copy#app#state#text#point#file

Discussion (46 Comments)Read Original on HackerNews
Cut is two operations copy and delete, copy is never undone by undo it should not be undone when you cut either. I cut, undo, ..., undo, and paste multiple times a day. It's a feature not a bug.
> Cut & Paste is not atomic
Yes because it's two different actions.
What does "Ghost Cut" do if you paste multiple times? Paste the cut text first and then what? The previous thing in your clipboard? Why does my editor need to read my clipboard if I am not pasting (to implement the rollback)? What if there was a secret key in there do we just hand it to copilot or whatever extension is running?
Cut is copy and delete plain and simple.
Cut and paste is a poor analogy in the file explorer, what the file explorer does is a move, "cutting" fills the first parameter and "pasting" fills the second. Hence the greying out and not doing anything until you paste. There is no clipboard for the filesystem. Also in the file browser it's extremely unlikely you would want to paste into multiple places, something not true in text editors.
EDIT:
Now listen I am not saying the proposed semantics are bad, to each their own, but it's a different operation all together the clipboard is not even required you could have a separate short cut that grays out the text and then moves it to where you want. The whole thing would be atomic called a move and be cleaner in all ways.
Because you're trying to 'copy' it?
This feels baby-duck-y. No given mental model is more right than another. There's already not even a consistent model, because:
>Cut is copy and delete
So copy and delete! Or, in Vim and Emacs, just delete!
Why would you cut + undo as opposed to just copy? Are they not the same operation at that point?
Cut + undo, is copy with visual feedback
The most glaring example seems to be the first: typically an accidental cut was intended to be a copy, not a delete, so leaving the text in your clipboard is a sensible design. I understand the author's perspective, and maybe OSes should have configurable "cut." But I think most people understand "undo" as "undo change to file" and not "undo change to file + OS state." In that sense the default behavior is not a flaw.
Again - the author's points about an alternative cut are reasonable, but they seem to appeal to a minority of users.
I find myself using the clipboard-erasure "defect" somewhat frequently to cut something to the clipboard, and then undoing the change and using the clipboard contents. And this is specifically useful in a way that merely copying isn't... but at the moment I can't remember why, or whether I use this when programming or working around InDesign's many defects.
- make a bunch of edits
- decide I don't like all of them
- copy the part I want to keep
- undo a bunch
- paste the good part
This is copy, not cut, but it wouldn't work if the clipboard state was part of the undo system.
What if you press Ctrl+X twice on separate regions and then press Escape (once)? Does it restore the state after the first Ctrl+X? So Ctrl+X pushes on a to-be-cut stack and Escape pops? Probably not.
Anyway, this looks like it means that the inability to undo the change in clipboard state is replaced by the inability to return to an earlier to-be-cut state. Or maybe the editor includes a Vim-like time-travel history that includes the to-be-cut state?
Regarding the clipboard state, given that the clipboard is an OS-level object, for me it makes sense that an application-level or document-level undo doesn’t undo changes in the OS object. Similarly, undo after Save doesn’t undo the change in the file system state. Of course, it’s fine to provide alternative editing operations in addition.
>pressing ctrl+x fades the selected text and makes it inert [...] Nothing is placed in the clipboard at this point
>What if you want the original semantics of cut? Ghost cut makes that two keys rather than one: copy to clipboard (control-C or command-C) followed by Backspace to remove it from the original document. I so rarely use cut without paste, that this is a clear win for me.
This is just as "broken" as the existing functionality, just in a way that the author prefers. It's a neat idea though, I like it, makes you wonder what would have happened in other apps if cut/paste was never developed as a system-wide, cross-app capability.
In my mental model (which is also how OSs work, though not necessarily how things ought work), the clipboard exists at the OS level, and undo/redo act on the application level. I don't find it to be unexpected or undesirable that doing Ctrl+X,V,Z,Z results in the application returning to its original state but the clipboard ending up being modified.
All that said, I appreciate that this interrogated my mental model a bit.
The issue he had with the “move to” operation is that it forced you into a mode where you had to pick a destination right away. I wonder if OP’s proposal was ever brought up at the time—it does seem like a promising middle ground!
The other part of it ("ghosting" the cut) just seems like a matter of taste, and at some point you have to consider whether going against decades of established muscle memory in the users of your software is really worth it.
That said, it is a good idea to re-examine our assumptions every once in a while, so kudos for that.
My bitterness is compounded by being on Linux, where this is probably even more encouraged in GUI apps then in other OSes. But I still have enough independent arguments with web sites, on my phone, and even in the context of the same application at times to have valid complaints just based on those.
Clipboards don't get an independent undo dimension because most users can't handle it. They're pretty full up on dimensions. Clipboard managers at an OS level are the better solution for those who can than another app "fixing" the problem in some unique way.
The Emacs mark-and-point UI works for everyone: fully functional hands, partially functioning hands, or even speech recognition. It also solves the problem of copy, cut, and paste described in the article.
imagine having that guy as your roommate!
But no. Your text editor is a cottage surrounded by an outdoors it doesn't control. It makes no more sense to try to take charge of the clipboard than of a flock of geese flying overhead. What if someone or some other app pasted something in between? Paste is an arrow shot, a message in a bottle.
It's true that cut and paste reflows text twice (once on cut and once on paste), but it does so in the place where your eyes are already looking. Ghost cut reflows only once (on paste), but it does so in a place where I'm not already looking. I find this much more confusing based on the video.
> Cut & Paste is not atomic
Neither is ghost cut, because if you only cut you're left with grey text as an intermediate state.
> Cut is undoable
...this is the part I agree with, and it seems trivially fixable. If you undo a `cut`, put back whatever was on the clipboard beforehand.
I think it would be confusing if only one app did it, but if an OS decided to implement this system wide, I think it would be a good improvement.
You could also make `copy` possible to undo, but I think that would be weirder since there's no visible effect of your undo action.
“Ghost cut” can work across apps with reasonable undo support by not using the clipboard at all and some form of IPC instead. For example, when you cut from app B before resolving the cut from app A, app A could be notified to cancel its cut.
I think this is much less intuitive than the current convention though.
...right, thanks. So you could still make it work but you'd definitely need OS support, it's not something one app can fix.
Edit: You could make this work on an app level by checking if the contents of the user's clipboard is still the value they cut. If yes, revert to whatever clipboard contents you saved prior to the cut. Otherwise do nothing.
It's probably too much hidden behavior to be a good idea, but I think it would match what the user wants in 99% of cases.
edit: Yeah, the problem is that the user does not expect undo to do something different depending on what they did on a different program.
Undo doing nothing to the clipboard always is more consistent and the better UX.
TFA and comments are clearly a solution is search of the problem.
On anything structured that doesn't require re-flow this approach makes some sense.
Lists, Grids, etc, there are pro/cons but it makes sense.
In this case you ARE causing reflow, so content and format change at the same time.
With normal cut and paste the reflow happens at the point of attention, and the final state paste keeps your eye right at the point of action.
This jumping around stuff means you are doubley losing tracking if you paste below the cut point. This is effectively an out of bound focus shift. This has higher cognitive penalty because layout is no longer occurring in serial but in parallel in multiple places.
idempotence, types, rejection of global state, all of these "engineering" rules go out the window when you enter the realm of mereological nihilism that is text editing.
The best you can do it think of things as causal chains like some CRDTs do.
/s