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Dealing with the Unix Copy and Paste Paradigm?
MolecularBear asks: "I grew up on Windows machines, using the ol' ctrl-c to copy and ctrl-v to paste. For the past few years I've been a hardcore Linux user, running it almost exclusively at home and at work. As I am sure you are all aware, highlighting text in Linux automatically performs a copy while the middle mouse button performs a paste. The Ctrl-c, Ctrl-v standard works in many applications, but not all. Lately I have begun to find the automatic highlight-copy to be annoying. As in, I'll highlight text to copy it, then realize I want to highlight a block of text for the purpose of deleting it. Of course, the second highlighting overwrites the first highlighting. I am curious about how other people accomplish their copy/paste needs. Any special setups, applications, or words of wisdom?"
I usually find you can just pick up the url by selecting it, then middle button drop it into the browser. That seems to work on konq, netscape, mozilla and firefox on both linux and solaris.
:)
But i do feel your pain
Firefox and Konqueror should have a button for "Open the clipboard in a new tab".
Just a small shortcut - Ctrl-K will (should!) erase the rest of the line, no need for highlighting it. Works wonders for clearing the URL bar :-).
Whats more interesting is that sometimes what control+v pastes is different from what the middle-click pastes.
.. cough xchat cough). It's extremely hard to convince egotistical programmers that their clipboard behaviour is actually wrong and confusing to users.
Yeah, there's basically two clipboards. The one when you just highlight something, and the one where you click "copy" in the menu.
The confusion comes when bugs in some programs confuse the two (or only implement one of them
I've had enough abrasive sigs. Kittens are cute and fuzzy.
It's always been broken.
And any mention of a possible solution brings down the wrath of nerds who want to keep unix as unintuitive and awkward as possible.
Besides the nuisance of what mouse click or keystroke you use to move text, it's not a clipboard like Windows uses, merely a text buffer.
Ie; it's only good for text. You cant copy/paste (and by extension drag and drop) files, bitmaps, etc uniformly between apps.
It's just another item in a laundry list of issues that are major to end users, but a low priority for hackers. Another speedbump on the road to Linux (unix) as a truly competitive desktop platform.
I don't need no instructions to know how to rock!!!!
Or else, first paste what you want to insert, then delete what you want to remove...
Only if your application sucks. freedesktop.org spells out how this should work; ctrl-c/ctrl-v manage the CLIPBOARD selection, and mouse selection manages the PRIMARY selection. Selecting text with the mouse should NOT interfere with ctrl-c ctrl-v operations in ANY way.
c /c lipboards.txt
http://freedesktop.org/Standards/clipboards-spe
The current consensus on freedesktop.org is something along the lines of:
The problem is that some apps use only the primary selection for all copy/paste operations, so it can get confusing.
For more info, look here
In every program I use in Linux (specifically, Mozilla, rdesktop, and various GNOME stuff) Ctrl-C/Ctrl-V work perfectly, and so does the select/middleclick system, and neither interferes with each other.
I haven't used KDE in a long time but I understand that they introduced the same behavior with Qt3/KDE3.
Unless you're using really ancient software, pretty much everything will work in *either* mode, or you can do what I do and use a combination of both (choosing whether to bother pressing Ctrl-C to copy depending on whether you're going to need to highlight something at the destination).
I'm really curious to understand how so many people manage to still have a problem with this. Are you perhaps expecting that since "everybody knows that select copies on Linux", Ctrl-V will paste the thing that you last selected, instead of the last thing you Ctrl-C'd, and not testing it to verify this? Or just assuming that selecting something will overwrite your Ctrl-C buffer? I'd like to believe that people would actually test these things before posting Ask Slashdots about it, but you have to wonder...
Don't forget that shift-insert is almost always used to paste the X clipboard (as opposed to the ctrl-c/ctrl-v one managed by the desktop environment). But then some programs (gecko browsers being the most annoying for me) go and alias this to the functionality of ctrl-v, so I have no keyboard equivalent for middle-click paste.
Do you really need reason for beer? Wingman Brewers
Urr, all wrong.
Control-C/V will copy/paste the CLIPBOARD selection. Highlight/middle click will copy/paste the PRIMARY selection. No real applications use the SECONDAY selection, but it still exists.
There is no difference between any of these clipboards, GNOME and KDE don't have their own clipboards (though KDE does have a daemon to collect copied data so that it persists after the application closes), and all X clipboards can handle any content type: it's the applications which don't support it.
http://freedesktop.org/Standards/ClipboardsWiki is an excellent summary of the X clipboard.
Is supposed to be the original Windows copy/cut/paste buttons:
Copy: Ctrl-Insert
Paste: Shift-Insert
(I can't remember what Cut is, I never use it.. probably ctrl-delete)
Then, sometime in the Win95 or Win98 era, Microsoft changed it to the less-intuitive and less-standard Ctrl-C, Ctrl-V.
And Microsoft was a member of the body of people/organizations that made Ctrl-Insert and Shift-Insert the standard.. then went and trashed it...
This is the CUA92 user interface universal standard, by the way.. and i'm a bit busy right now to do a google search for it, but I'm sure anyone interested could find it..
"Champagne for my real friends - and real pain for my sham friends!" http://ericblade.postalboard.com/
Yeah, there's basically two clipboards.
Yup. The best explanation I know of how this works from someone who would know :)
Do you even know anything about perl? -- AC Replying to Tom Christiansen post.
Yes, there is a common clipboard mechanism. Once you understand that there are two separate clipboards (and that this is a feature), everything makes sense.
l - sp ec/clipboards.txt
Here's how it behaves in modern X environments like KDE 3, GNOME, XFCE, etc.:
- There is a clipboard (called CLIPBOARD in the specs), which you interact with by explicit copy and paste commands, for which the key bindings are conventionally Ctrl+C, Ctrl+V, Ctrl+X to copy, paste and cut respectively. Use it whenever you would use the Windows or Mac OS clipboard, teach it to new users, and so on.
- As an extra "easter egg", applications can manipulate the selection (the currently highlighted text) using the same API. The convention is to select text by dragging (or Shift+cursor keys, etc.) and to copy the selection from another program by pressing the middle mouse button. I will reassert: this is an "easter egg" for advanced users. The specs call this the "primary selection", PRIMARY (there is also a SECONDARY, but I am not aware of any program that uses it).
As documented here:
http://www.jwz.org/doc/x-cut-and-paste.htm
http://pdx.freedesktop.org/Standards/clipboards
OK, now the holes in that logical explanation:
- KDE 2 used to use Ctrl+C, Ctrl+V to manipulate PRIMARY. This was wrong and had all the flaws the poster cites. Solution: Upgrade to KDE 3, problem solved.
- Some other broken apps do the same. Solution: either fix them as you suggest, or stop using them. GNU Emacs 20 was apparently broken in the same way as KDE 2, while XEmacs and GNU Emacs 21 apparently work in the same way as KDE 3 (I can't confirm this, I use vim myself).
- Some (usually older) apps (like xterm) don't have copy or paste commands at all, but do have the selection/middle-click behaviour. Solution: either use something else (e.g. Konsole if you're a KDE fan) or learn the middle-click behaviour too. Since the command line is generally considered to be "hard", it shouldn't be that much of an intellectual leap.
- Ctrl+C already means something very common and specific (send a SIGINT) in console windows, so the standard Windows-style keybindings cannot be used in console windows. This is a historical clash between the Unix/DOS "Ctrl+C interrupts" and the Windows/OS2 "Ctrl+C copies" (on the Mac the convention is actually Command-C, so Ctrl is still available, and OS X's Terminal uses it as you'd expect) - Windows' MS-DOS-derived command prompt has the same conflict and a similar solution.
In a nutshell, there are TWO completely different clipboards implemented in X:
These two clipboards do not affect or interact with each other.
Other OS's (like Windows) only have the second kind. Modern Unix applications (like anything based on GTK, QT, or Mozilla) support both clipboards simultaneously and independently.
Old X Windows applications like XTerm only support the first kind. This is why you can't copy from or paste into an XTerm using C-c and C-v.
So if you are using modern applications, you should always be able to use C-c and C-v. If you have to copy or paste something into an XTerm, you will have to select it and middle-click. The solution is to use a moderm terminal, like gnome-terminal, instead of XTerm.
If you read the article, you'll learn that there are actually three different clipboards in X (one of which is never used), and that Emacs and XEmacs then implement yet another fourth clipboard!
Also see the freedesktop.org reference.
In Mozilla and Firebird at least there is the very useful, but little-known shortcut Ctrl-L. This highlights the url bar but does *not* copy it to the clipboard. So when I'm in that situation I do Ctrl-L, delete, middle click.
Of course, the middle-click on the page body works too, as long as you don't have to edit the URL. Ctrl-L is still super-handy if you want to type in an URL by hand or something.
You know what I hate? Wait, what do you like? I hate that!