Re: [External] : Getting text from next non-blank line

[Heime]

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On Saturday, April 20th, 2024 at 11:12 AM, Stephen Berman 
<stephen.berman@gmx.net> wrote:

> On Fri, 19 Apr 2024 23:00:30 +0000 Heime heimeborgia@protonmail.com wrote:
> 
> > On Saturday, April 20th, 2024 at 10:37 AM, Stephen Berman
> > stephen.berman@gmx.net wrote:
> > 
> > > On Fri, 19 Apr 2024 21:50:12 +0000 Heime heimeborgia@protonmail.com wrote:
> > > 
> > > > Sent with Proton Mail secure email.
> > > > 
> > > > On Saturday, April 20th, 2024 at 9:04 AM, Drew Adams 
> > > > drew.adams@oracle.com wrote:
> > > > 
> > > > > > This interactive function requests the user to input a string
> > > > > > associated with the current line number. I want to change it so
> > > > > > that the function picks out the text on the current line or the
> > > > > > text of the next non-blank line. But also allow the user to write
> > > > > > their own text for the line.
> > > > > 
> > > > > ...
> > > > > 
> > > > > > (interactive "sString: ")
> > > > > 
> > > > > Don't use that, if you want to provide a
> > > > > default value for the user input.
> > > > > 
> > > > > Instead, use a function that accepts a
> > > > > default value. E.g., `read-string' or` completing-read'.
> > > > > 
> > > > > Read how to use `interactive' with a sexp as argument that returns 
> > > > > the list of args you want` interactive' to pass
> > > > > to the function body.
> > > > > 
> > > > > https://www.gnu.org/software/emacs/manual/html_node/elisp/Using-Interactive.html
> > > > 
> > > > Have started with this to get the non-blank text. But still no way for
> > > > use to use his own text.
> > > 
> > > Follow Drew's advice, e.g. use read-string with your if-sexp as the
> > > default value. (But what if the next line after a blank line is also
> > > blank? And the string (thing-at-point 'line t) returns includes the
> > > newline at the end of the line; do you want that?)
> > > 
> > > Steve Berman
> > 
> > If the next line after a blank line is also blank, I continue until
> > I get to the first non-blank line.
> 
> 
> What happens if the buffer ends in one or more blank lines?

In such case I give an empty string to read-string default value LINE,
and the user can insert his own text.
 
> > I have noticed the newline at the end of the line - I do not want that.
> > Want to remove leading and trailing blanks as well.
> 
> string-trim
> 
> Steve Berman
 
There will certainly be a lot of elisp in the interactive part.

> > My latest version follows.
> > 
> > (defun tema-mark ()
> > "Store a string with the line number in `my-alist`.
> > If the current line is blank, move to the next non-blank line."
> > (interactive)
> > 
> > (let* ((initial-line (thing-at-point 'line t))
> > (initial-line-number (line-number-at-pos))
> > (line (if (string-blank-p initial-line)
> > (progn
> > (forward-line)
> > (while (string-blank-p (thing-at-point 'line t))
> > (forward-line))
> > (thing-at-point 'line t))
> > initial-line))
> > (lnum (line-number-at-pos))
> > (text (read-string "Enter text to store: " line)))
> > 
> > (setq-local tema-lugar
> > (append tema-lugar
> > (list (cons text lnum)))) ))