Which editors out of Emacs, Vim and JEdit support

问题:

Background: JEdit (and some other text editors as well) support a feature called Multiple simultaneous text insertion points. (at least that's what I'm calling it here).

To understand what this means, take a look at the link.

Out of all the features in use in modern text editors, initial research seems to indicate that this is one feature that both Emacs and Vim do not actually support. If correct, this would be pretty exceptional since it's quite difficult to find a text editor feature that has not made its way into at least one of these two old-school editors.

Question: Has anyone ever seen or implemented this feature in either Emacs, Vim, or both? If so, please point me to a link, script, reference or summary that explains the details.

If you know an alternate way to do the same (or similar) thing, please let me know.

回答1:

The vim way to do this is the . command which repeats the last change. So, for instance, if I change a pointer to a reference and I have a bunch of obj->func that I want to change to obj.func then I search for obj->, do 2cw to change the obj-> to obj., then do n.n.n. until all the instances are changed.

Perhaps not a flexible as what you're talking about, but it works frequently and is very intuitive and fast when it does.

回答2:

moccur-edit.el almost does what you want. All the locations matching the regexp are displayed, and the editing the matches makes changes in the corresponding source. However, the editing is done on a single instance of the occurrence.

I imagine it'd be straight forward to extend it to allow you to edit them all simultaneously (at least in the simple case).

There is a demo of it found here.

Turns out, the newest versions of moccur-edit don't apply changes in real-time - you must apply the changes. The changes are also now undoable (nice win).

回答3:

In EMACS, you could/would do it with M-x find-grep and a macro. If you really insist that it be fully automatic, then you'd include the find-next in the macro.

But honestly, this strikes me as a sort of Microsoft-feature: yes, it adds to the feature list, but why bother? And would you remember it existed in six months, when you want to use it again?

回答4:

For emacs, multiple-cursors does exactly that.

Have a look at emacsrocks episode 13, by the author of the module.

回答5:

I don't think this feature has a direct analogue in either Emacs or Vim, which is not to say that everything achievable with this feature is not possible in some fashion with the two 'old-school' editors. And like most things Emacs and Vim, power-users would probably be able to achieve such a task exceedingly quickly, even if mere mortals like myself could spend five minutes figuring out the correct grep search and replace with appropriate back-references, for example.

回答6:

YASnippet package for Emacs uses it. See 2:13 and 2:44 in the screencast.

回答7:

Another slight similarity: In Emacs, the rectangle editing features provided by cua-selection-mode (or cua-mode) automatically gives you multiple insertion points down the left or right edge of the marked rectangle, so that you can type a common prefix or suffix to all of those lines.

e.g.:
M-x cua-selection-mode RET (enable the global minor mode, if you don't already use this or cua-mode)
C-RET down down down (marks a 1x3 character rectangle)
type prefix here
C-RET (unmark the rectangle to return to normal editing)

回答8:

It should be something like this in vim:

%s/paint.\((.*),/\1.paint(/ 

Or something like that, I am really bad at "mock" regular expressions.

The idea is substitute the pattern:

/paint(object,/ 

with

/object.paint(/ 

So, yes, it is "supported"

回答9:

It seemed simple to do a basic version of this in Emacs lisp. This is for when you just want two places to insert text in parallel:

(defun cjw-multi-insert (text)
  "insert text at both point and mark"
  (interactive "sText:")
  (insert-before-markers text)
  (save-excursion
    (exchange-point-and-mark)
    (insert-before-markers text)))

When you run it, it prompts for text and inserts it at both point (current position) and mark. You can set the mark with C-SPC. This could be easily extended for N different positions. A function like set-insert-point would record current position (stored as an Emacs marker) into a list and then when you run the multi-insert command, it just iterates through the list adding text at each.

I'm not sure about what would a simple way to handle a more general "multi-editing" feature.

回答10:

Nope. This would be quite difficult to do with a primarily console-based UI.

That said, there is similar features in vim (and emacs, although I've not used it nearly as much) - search and replace, as people have said, and more similarly, column insert mode: http://pivotallabs.com/users/brian/blog/articles/350-column-edit-mode-in-vi

回答11:

This looks like Regular Expression Search/Replace for Dummies. The trouble starts when the user does not realize that the generalization proposed by the computer is wrong. And the trouble gets worse when the alternative generalization selected produces a disaster in the 1200th editing region which is way off screen.

That being said - no, there is no support in Emacs as far as I know.