[emacs-w3m:13930] Re: [emacs-w3m/emacs-w3m] Doesn't work correctly with display-line-numbers-mode (Issue #117)

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> I think w3m should either subtract `line-number-display-width` from `window-width` in `w3m-display-width`

Emacs-w3m works mainly in a temporary working buffer, and displays the result in the page buffer, i.e., the buffer that
renders a web page.    So, what we need to have in order to adjust the window width value would be a means to know,
in a temp buffer, the value of `line-number-display-width` measured in the page buffer.

However, it looks hard or impossible to me.  I've never gotten (2 2) with trials like this:
```
(let ((cur (current-buffer))
      (w3m-session-load-crashed-sessions nil)
      page-buffer w1 w2)
  (w3m "about:")
  (sit-for 1)
  (display-line-numbers-mode t)
  (sit-for 1)
  (setq page-buffer (current-buffer)
	w1 (line-number-display-width))
  (switch-to-buffer cur)
  (sit-for 1)
  (save-window-excursion
    (set-window-buffer nil page-buffer)
    (sit-for 1)
    (setq w2 (line-number-display-width))
    (message "Line numbers width is: %d" w2)
    (sit-for 1))
  (kill-buffer page-buffer)
  (list w1 w2))
 => (2 0)
```
> or forcefully disable `display-line-numbers-mode` when it is enabled globally.

This might be the only thing we can do.


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<p></p>
<blockquote>
<p dir="auto">I think w3m should either subtract <code class="notranslate">line-number-display-width</code> from <code class="notranslate">window-width</code> in <code class="notranslate">w3m-display-width</code></p>
</blockquote>
<p dir="auto">Emacs-w3m works mainly in a temporary working buffer, and displays the result in the page buffer, i.e., the buffer that<br>
renders a web page.    So, what we need to have in order to adjust the window width value would be a means to know,<br>
in a temp buffer, the value of <code class="notranslate">line-number-display-width</code> measured in the page buffer.</p>
<p dir="auto">However, it looks hard or impossible to me.  I've never gotten (2 2) with trials like this:</p>
<pre class="notranslate"><code class="notranslate">(let ((cur (current-buffer))
      (w3m-session-load-crashed-sessions nil)
      page-buffer w1 w2)
  (w3m "about:")
  (sit-for 1)
  (display-line-numbers-mode t)
  (sit-for 1)
  (setq page-buffer (current-buffer)
	w1 (line-number-display-width))
  (switch-to-buffer cur)
  (sit-for 1)
  (save-window-excursion
    (set-window-buffer nil page-buffer)
    (sit-for 1)
    (setq w2 (line-number-display-width))
    (message "Line numbers width is: %d" w2)
    (sit-for 1))
  (kill-buffer page-buffer)
  (list w1 w2))
 =&gt; (2 0)
</code></pre>
<blockquote>
<p dir="auto">or forcefully disable <code class="notranslate">display-line-numbers-mode</code> when it is enabled globally.</p>
</blockquote>
<p dir="auto">This might be the only thing we can do.</p>

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