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runtime(doc): clarify documentation for "v" position at line()

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Problem: the previous documentation falsely states that "v" always
refers to the start of a visual area.  In fact, the reference of "v" and
"." complement each other.  If the cursor is at the start of
a (characterwise) visual area, then "v" refers to the end of the area.

Solution: be more verbose and explicit about the connection between "."
and "v" and also refer to |v_o| which many vim users will be familiar
with for visual areas.

Signed-off-by: Peter Aronoff <peter@aronoff.org>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Peter Aronoff
2024-06-11 19:22:53 +02:00
committed by Christian Brabandt
parent 4877cb411f
commit 210b39c2d6
1 changed files with 16 additions and 5 deletions
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21
runtime/doc/builtin.txt
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@@ -1,4 +1,4 @@
*builtin.txt* For Vim version 9.1. Last change: 2024 Jun 06
*builtin.txt* For Vim version 9.1. Last change: 2024 Jun 11
VIM REFERENCE MANUAL by Bram Moolenaar
@@ -6191,10 +6191,21 @@ line({expr} [, {winid}]) *line()*
display isn't updated, e.g. in silent Ex mode)
w$ last line visible in current window (this is one
less than "w0" if no lines are visible)
v In Visual mode: the start of the Visual area (the
cursor is the end). When not in Visual mode
returns the cursor position. Differs from |'<| in
that it's updated right away.
v When not in Visual mode, returns the cursor
position. In Visual mode, returns the other end
of the Visual area. A good way to think about
this is that in Visual mode "v" and "." complement
each other. While "." refers to the cursor
position, "v" refers to where |v_o| would move the
cursor. As a result, you can use "v" and "."
together to work on all of a selection in
characterwise visual mode. If the cursor is at
the end of a characterwise visual area, "v" refers
to the start of the same visual area. And if the
cursor is at the start of a characterwise visual
area, "v" refers to the end of the same visual
area. "v" differs from |'<| and |'>| in that it's
updated right away.
Note that a mark in another file can be used. The line number
then applies to another buffer.
To get the column number use |col()|. To get both use