window-width, the terminal and linum-mode

window-width, the terminal and linum-mode

[Hans-Peter Deifel]

Hi group,

I was looking in "(elisp) Window Sizes" for a function to give me the
width of the text area of a window and found `window-body-width'.
However, this function gives me different results in terminal and GUI
modes, when linum-mode is enabled.

In terminal emacs, `window-body-width' includes the width of the line
number, while in gui emacs it doesn't. In both cases, the line number
width is returned correctly by `(window-margins)'.

So the question is: How can I get the width of the text-area (meaning,
in my case, without the line-numbers). I'd also like to avoid having to
distinguish X and terminal mode explicitly.

Thanks,
HP

--
Hans-Peter Deifel
GNU Emacs 24.2.1 (x86_64-pc-linux-gnu, GTK+ Version 3.4.4)

Re: window-width, the terminal and linum-mode

[Constantin Kulikov]

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Maybe try `(window-width)' ?

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Re: window-width, the terminal and linum-mode

[Eli Zaretskii]

> From: Hans-Peter Deifel <hpdeifel@gmx.de>
> Date: Tue, 25 Dec 2012 11:33:33 +0100
> 
> I was looking in "(elisp) Window Sizes" for a function to give me the
> width of the text area of a window and found `window-body-width'.
> However, this function gives me different results in terminal and GUI
> modes, when linum-mode is enabled.
> 
> In terminal emacs, `window-body-width' includes the width of the line
> number, while in gui emacs it doesn't. In both cases, the line number
> width is returned correctly by `(window-margins)'.

It's a bug in window-body-width, now fixed in the development sources,
thanks to your report.  It should exclude the display margins from the
width calculation on TTYs as well.

Re: window-width, the terminal and linum-mode

[Hans-Peter Deifel]

On Di, Dez 25 2012, Eli Zaretskii wrote:
>> I was looking in "(elisp) Window Sizes" for a function to give me the
>> width of the text area of a window and found `window-body-width'.
>> However, this function gives me different results in terminal and GUI
>> modes, when linum-mode is enabled.
>> 
>> In terminal emacs, `window-body-width' includes the width of the line
>> number, while in gui emacs it doesn't. In both cases, the line number
>> width is returned correctly by `(window-margins)'.
>
> It's a bug in window-body-width, now fixed in the development sources,
> thanks to your report.  It should exclude the display margins from the
> width calculation on TTYs as well.

Very cool. Thank you very much.

HP