yank without indentation?

yank without indentation?

[Eric Abrahamsen]

Has anyone come up with a yank-without-indentation routine? Why am I
always killing multi-line text with enormous left-hand whitespace, and
wanting to yank it without that whitespace in place? Has anyone dealt
with this?

E

Re: yank without indentation?

[Thorsten Jolitz]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

> Has anyone come up with a yank-without-indentation routine? Why am I
> always killing multi-line text with enormous left-hand whitespace, and
> wanting to yank it without that whitespace in place? Has anyone dealt
> with this?

I have 3 chomp function loaded right now:

,----------------
| org-babel-chomp
| outshine-chomp
| s-chomp
`----------------

and outshine-chomp seems to be the only one that handles leading
whitespace to. 

You could write your own chomp-and-yank function based on these, but I'm
sure more than one exists out there ...

-- 
cheers,
Thorsten

Re: yank without indentation?

[Nicolas Richard]

Thorsten Jolitz <tjolitz@gmail.com> writes:

> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>
>> Has anyone come up with a yank-without-indentation routine? Why am I
>> always killing multi-line text with enormous left-hand whitespace, and
>> wanting to yank it without that whitespace in place? Has anyone dealt
>> with this?
>
> I have 3 chomp function loaded right now:
>
> ,----------------
> | org-babel-chomp
> | outshine-chomp
> | s-chomp
> `----------------
>
> and outshine-chomp seems to be the only one that handles leading
> whitespace to.

That's because removing both leading and trailing whitespace is usually
called trim :)
So you have org-trim, s-trim, ...

OTOH, I think the question is not only about leading space, but also
about space after newline chars. Does your function handle them ?

FWIW, if I had to write such a function, I would do as follows : if the
first line is indented, remove that amount of space on every line. If
the second line is indented, remove that amount of space on every line
(except the first). (And eventually yank.)

The reason for checking the 2nd line is that I often have text like:
> <prompt> bla bla bla
>          bla bla bla
>          bla bla bla
and I kill the text from the end of the prompt to the end of the "bla
bla". Yanking it then gives:
> bla bla bla
>          bla bla bla
>          bla bla bla
which is ugly.

Not sure if that's what Eric had in mind though.

-- 
Nico.

Re: yank without indentation?

[Grant Rettke]

Please provide a simple and illustrative example.

Sorry I'm not sure what you are getting at.

Grant Rettke | AAAS, ACM, ASA, FSF, IEEE, SIAM, Sigma Xi
gcr@wisdomandwonder.com | http://www.wisdomandwonder.com/
“Wisdom begins in wonder.” --Socrates
((λ (x) (x x)) (λ (x) (x x)))
“Life has become immeasurably better since I have been forced to stop
taking it seriously.” --Thompson


On Thu, Jun 5, 2014 at 10:13 AM, Eric Abrahamsen <eric@ericabrahamsen.net>
wrote:

> Has anyone come up with a yank-without-indentation routine? Why am I
> always killing multi-line text with enormous left-hand whitespace, and
> wanting to yank it without that whitespace in place? Has anyone dealt
> with this?
>
> E
>
>
>

Re: yank without indentation?

[Jacob Gerlach]

I run in to this problem sometimes when yanking a piece of code with
certain indentation into a new place where it should have different (more
or less) indentation. My solution is:

C-y
C-x C-x (exchange-point-and-mark) to re-highlight the yanked text
<TAB> to properly indent it for the new contexxt


On Thu, Jun 5, 2014 at 11:13 AM, Eric Abrahamsen <eric@ericabrahamsen.net>
wrote:

> Has anyone come up with a yank-without-indentation routine? Why am I
> always killing multi-line text with enormous left-hand whitespace, and
> wanting to yank it without that whitespace in place? Has anyone dealt
> with this?
>
> E
>
>
>

Re: yank without indentation?

[Robert Thorpe]

Jacob Gerlach <jacobgerlach@gmail.com> writes:

> I run in to this problem sometimes when yanking a piece of code with
> certain indentation into a new place where it should have different (more
> or less) indentation. My solution is:
>
> C-y
> C-x C-x (exchange-point-and-mark) to re-highlight the yanked text
> <TAB> to properly indent it for the new contexxt

That's what I do.  Another possibility is using the region rectange
commands C-x r k and C-x r y.

BR,
Robert Thorpe

RE: yank without indentation?

[Drew Adams]

> Has anyone come up with a yank-without-indentation routine? Why am I
> always killing multi-line text with enormous left-hand whitespace, and
> wanting to yank it without that whitespace in place? Has anyone dealt
> with this?

This should do pretty much what you want.

(defun yank-sans-indent (&optional arg)
  "Like `yank', but remove indentation."
  (interactive "*P")
  (setq yank-window-start  (window-start)
        this-command       t)
  (push-mark (point))
  (insert-for-yank (string-trim (current-kill (cond ((listp arg) 0)
                                                    ((eq arg '-) -2)
                                                    (t (1- arg))))))
  (when (consp arg)
    (goto-char (prog1 (mark t)
                 (set-marker (mark-marker) (point) (current-buffer)))))
  (when (eq this-command t) (setq this-command  'yank-sans-indent))
  nil)

(defun string-trim (string)
  "Trim SPC and TAB chars from ends of STRING and each of its eols."
  (let* ((start    (progn (string-match "\\`[ \t]*" string)
                          (match-end 0)))
         (end      (progn (string-match "[ \t]*\\'" string start)
                          (match-beginning 0)))
         (trimmed  (substring string start end)))
    (replace-regexp-in-string "\\(\n\\)[ \t]+" "\\1" trimmed)))

(global-set-key "\C-y" 'yank-sans-indent)

(You can also bind `M-y' to a command that is `yank-pop' but with
references to `yank' replaced by `yank-sans-indent'.)

[If you want the string that is placed on the `kill-ring' to be the
complete selected text, instead of that text trimmed to remove
indentation, then you can use an alternative approach of placing
a `yank-handler' property on the first character, and define a
yank handler that trims the indenting whitespace at the time of
insertion.]

Re: yank without indentation?

[Eric Abrahamsen]

Nicolas Richard <theonewiththeevillook@yahoo.fr> writes:

> Thorsten Jolitz <tjolitz@gmail.com> writes:
>
>> Eric Abrahamsen <eric@ericabrahamsen.net> writes:
>>
>>> Has anyone come up with a yank-without-indentation routine? Why am I
>>> always killing multi-line text with enormous left-hand whitespace, and
>>> wanting to yank it without that whitespace in place? Has anyone dealt
>>> with this?
>>
>> I have 3 chomp function loaded right now:
>>
>> ,----------------
>> | org-babel-chomp
>> | outshine-chomp
>> | s-chomp
>> `----------------
>>
>> and outshine-chomp seems to be the only one that handles leading
>> whitespace to.
>
> That's because removing both leading and trailing whitespace is usually
> called trim :)
> So you have org-trim, s-trim, ...
>
> OTOH, I think the question is not only about leading space, but also
> about space after newline chars. Does your function handle them ?
>
> FWIW, if I had to write such a function, I would do as follows : if the
> first line is indented, remove that amount of space on every line. If
> the second line is indented, remove that amount of space on every line
> (except the first). (And eventually yank.)
>
> The reason for checking the 2nd line is that I often have text like:
>> <prompt> bla bla bla
>>          bla bla bla
>>          bla bla bla
> and I kill the text from the end of the prompt to the end of the "bla
> bla". Yanking it then gives:
>> bla bla bla
>>          bla bla bla
>>          bla bla bla
> which is ugly.
>
> Not sure if that's what Eric had in mind though.

That's actually exactly the situation that prompted my question, but I
seem to run into similar situations all the time: yanking a multi-line
address from a BBDB record, copying a few sexps out of the middle of a
deeply-indented function and yanking them into an email, etc.

I'm going to give Drew's solution  test-drive, but I also like your
idea of "cascading" indentation deletion.

Thanks,
Eric

Re: yank without indentation?

[Eric Abrahamsen]

Drew Adams <drew.adams@oracle.com> writes:

>> Has anyone come up with a yank-without-indentation routine? Why am I
>> always killing multi-line text with enormous left-hand whitespace, and
>> wanting to yank it without that whitespace in place? Has anyone dealt
>> with this?
>
> This should do pretty much what you want.
>
> (defun yank-sans-indent (&optional arg)
>   "Like `yank', but remove indentation."
>   (interactive "*P")
>   (setq yank-window-start  (window-start)
>         this-command       t)
>   (push-mark (point))
>   (insert-for-yank (string-trim (current-kill (cond ((listp arg) 0)
>                                                     ((eq arg '-) -2)
>                                                     (t (1- arg))))))
>   (when (consp arg)
>     (goto-char (prog1 (mark t)
>                  (set-marker (mark-marker) (point) (current-buffer)))))
>   (when (eq this-command t) (setq this-command  'yank-sans-indent))
>   nil)
>
> (defun string-trim (string)
>   "Trim SPC and TAB chars from ends of STRING and each of its eols."
>   (let* ((start    (progn (string-match "\\`[ \t]*" string)
>                           (match-end 0)))
>          (end      (progn (string-match "[ \t]*\\'" string start)
>                           (match-beginning 0)))
>          (trimmed  (substring string start end)))
>     (replace-regexp-in-string "\\(\n\\)[ \t]+" "\\1" trimmed)))
>
> (global-set-key "\C-y" 'yank-sans-indent)
>
> (You can also bind `M-y' to a command that is `yank-pop' but with
> references to `yank' replaced by `yank-sans-indent'.)
>
> [If you want the string that is placed on the `kill-ring' to be the
> complete selected text, instead of that text trimmed to remove
> indentation, then you can use an alternative approach of placing
> a `yank-handler' property on the first character, and define a
> yank handler that trims the indenting whitespace at the time of
> insertion.]

Whoa, that was pretty intense -- I didn't know anything about yank
handlers or insert-for-yank, etc. As usual, what seems to be a
straightforward operation has a lot of stuff going on in the background!
Thanks a lot for this code, I'll probably end up using it or something
like it, though I'm also going to go learn about yank handlers first.

Thanks again,
E

Re: yank without indentation?

[Eli Zaretskii]

> From: Robert Thorpe <rt@robertthorpeconsulting.com>
> Date: Thu, 05 Jun 2014 23:26:39 +0100
> Cc: eric@ericabrahamsen.net, help-gnu-emacs@gnu.org
> 
> Jacob Gerlach <jacobgerlach@gmail.com> writes:
> 
> > I run in to this problem sometimes when yanking a piece of code with
> > certain indentation into a new place where it should have different (more
> > or less) indentation. My solution is:
> >
> > C-y
> > C-x C-x (exchange-point-and-mark) to re-highlight the yanked text
> > <TAB> to properly indent it for the new contexxt
> 
> That's what I do.

This is shorter: "C-y C-M-\".

And if you need to change the indentation, "C-y C-u 2 C-x TAB" (in
this case will increase indentation by 2 columns, but the number 2 is
just an example).

Re: yank without indentation?

[Ken Goldman]

How about an automated version?  I've been using this:

; automatically indenting yanked text if in programming-modes

(defadvice yank (after indent-region activate)
   (if (member major-mode '(emacs-lisp-mode
			   c-mode c++-mode
			   tcl-mode sql-mode
			   perl-mode cperl-mode
			   java-mode jde-mode
			   LaTeX-mode TeX-mode))
       (indent-region (region-beginning) (region-end) nil)))


On 6/5/2014 3:25 PM, Jacob Gerlach wrote:
> I run in to this problem sometimes when yanking a piece of code with
> certain indentation into a new place where it should have different (more
> or less) indentation. My solution is:
>
> C-y
> C-x C-x (exchange-point-and-mark) to re-highlight the yanked text
> <TAB> to properly indent it for the new contexxt