How to reliably check if at the beginning of the line in Evil visual state?

[hubisan]

How to reliably check if at the beginning of the line in Evil visual state?

[hubisan]

Thanks.

I changed my code to:

(defun my-feat-evil/bolp-fix (orig-fn)
  "Fix `bolp' not returning `t' if in Evil visual state.
This occurs when only the first character is marked."
  (save-excursion
    (when (eq evil-state 'visual)
      (goto-char evil-visual-point))
    (funcall orig-fn)))

(advice-add 'bolp :around #'my-feat-evil/bolp-fix)

[hubisan]

For the time being I am using an advice to get around this edge case (answer to question on stackexchange, slightly modified):

  (defun my-feat-evil/bolp-fix (orig-fn)
    "Fix `bolp' sometimes not returning `t' if in Evil visual state.
If only the first character of a line is marked, else it works."
    (save-excursion
      (when (and (eq evil-state 'visual)
                 (= (- (region-end) (region-beginning)) 1)
                 (= (line-beginning-position) (- (point) 1)))
        (backward-char))
      (funcall orig-fn)))
  (advice-add 'bolp :around #'my-feat-evil/bolp-fix)

I understand the problem now. Without evil-mode setting the mark doesn't mark the first character, one has to move forward one char to do so. Evil automatically marks the first character to copy the behaviour of vim. So it moves forward by one character when switching to visual state. Unfortunately this is not so clear for the user when using evil-mode as the cursor only switches the color and doesn't seem to move.

[axelf4]

While in Visual(-line) state before each command, the point&mark are temporarily adjusted such that delete-region etc. work as expected. The original values are stored in evil-visual-point and evil-visual-mark. So you could do e.g.

M-: (save-excursion (goto-char evil-visual-point) (bolp)) RET

If I switch to visual state when I am not at the beginning of the line and then move to the beginning of the line with 0, bolp correctly returns t.

This is a question of whether the point or the mark is at BOL.