Re: Print value of selected-window in some info buffer

[Heime <heimeborgia@protonmail.com>]

On Wednesday, May 15th, 2024 at 5:25 PM, Yuri Khan <yuri.v.khan@gmail.com> wrote:

> On Wed, 15 May 2024 at 04:26, Heime heimeborgia@protonmail.com wrote:
> 
> > How can the value of selected-window be printed in some info buffer ?
> > 
> > Because I get a failure with (bdrive-insert (selected-window))
> 
> 
> You are passing a window here…
> 
> > (defun bdrive-insert (objekt)
> > "TODO"
> > 
> > (with-current-buffer (get-buffer-create bfname)
> > 
> > (cond
> > ((stringp objekt)
> 
> 
> … but here you test objekt for being a string, and if not, you skip
> the insertion.
> 
> > (insert (concat objekt "\n" ))) )))
> 
> 
> If you want to print the window object’s default string
> representation, like ‘#<window 669 on scratch>’, remove the stringp
> 
> test and use:
> 
> (insert (format "%s\n" objekt))

I want to print the string representation.  The function will perform
something for a string, something else for an integer, ...

How can one capture a window such as (selected-window) with a cond ?
 
> If you want to print specific properties of the window, extract those
> with the appropriate ‘window-*’ functions and pass them into ‘format’.
> Provide placeholders in the format string for each value you print.
> 
> 
> Also, learn to use the debugger so you can solve this and similar
> issues yourself. Anywhere within the ‘bdrive-insert’ definition, type
> ‘C-u C-M-x’. This instruments your function to invoke the debugger
> when called. Next, evaluate your ‘(bdrive-insert (selected-window))’
> form. You get a window showing the function source, with point on the
> first subexpression to be evaluated, likely ‘bfname’, echo area
> showing its value. Type ‘n’ for ‘next’. Point moves to the next
> expression in evaluation order. Do this until you get to ‘objekt’
> (showing ‘#<window 669 on scratch>’) and then ‘(stringp objekt)’
> 
> (showing ‘nil’). At this point, you can see that a window is not a
> string.