CODEWITHSUNDEEP
vim
antak
antak

Reputation: 20749

How to determine horizontal scroll position in vim

In the below vim window represented by visible area, how do I get the horizontal position of X, relative to Y, from a function?

Y------------------------+
1 File contents          |
|                        |
|   +-X--------------+   |
|   |4|              |   |
|   |5| Visible area |   |
|   |6|              |   |
|   +-+--------------+   |
$    ^                   |
+----|-------------------+
     \
       line numbers

For example, the vertical position of X relative to Y is four, as in the window is scrolled four rows down. I can get this as a zero-based index with line("w0") - 1.

I how do I determine how many columns rightwards the window is scrolled at a given moment? I've tried virtcol(".") - wincol() but that alone is slightly off if the cursor is over a double-width character.

Upvotes: 5

Views: 587

Answers (3)

Rom Grk
Rom Grk

Reputation: 536

Here is a solution without modifying the cursor position:

winsaveview().leftcol

Upvotes: 4

fent
fent

Reputation: 18205

It's unfortunate that vim doesn't have a more direct way to get this, but the following will work

let cursor_pos = getpos('.')
normal g0
let scroll_x = col('.')
setpos('.', cursor_pos)

The trick is the g0 motion, which moves the cursor the left of the window, and from there we can get the current cursor column.

Upvotes: 0

ZyX
ZyX

Reputation: 53604

If you want to have number column width use max([len(line('$')), &numberwidth])+1.

What does “horizontal position” mean? wincol() is horizontal position in the window, col(".") is byte offset from the start of the line, strchars(getline('.')[:(col('.')-1)]) is the number of unicode codepoints from the start of the line, len(split(getline('.')[:(col('.')-1)], '.\@=')) is the number of characters from the start of the line.

Upvotes: 0

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