Keeping the cursor in the current position

[navlalli]

Firstly, fantastic plugin @michaelb !

I have defined a keymap in a .lua file which allows me to run the whole file by pressing F5:

vim.keymap.set('n', '<F5>', ":%SnipRun <CR>", {})

I've been trying to set this keymap up so that the cursor remains at the current position when I use this shortcut (right now it jumps to the top of the file and <Ctrl-o> doesn't always take me back to the same position). I've been trying to use let b:caret=winsaveview() and call winrestview(b:caret), as written in the documentation, but with no success so far.

Has anyone got an example of how to achieve this in a .lua file?

[michaelb]

Something like

:lua vim.keymap.set('n', '<F5>', ":let b:caret=winsaveview() <CR> | :%SnipRun <CR>| :call winrestview(b:caret) <CR>", {}) should do the trick (it does for me), though there may be better ways to express that in vimscript and I'm no expert

[navlalli]

Works perfectly, thank you!! May be useful to add something like that below this part in the documentation.

[rinpatch]

@michaelb Hi, I am trying to adapt your code for running a snipped from start of file to current line. Here is what I got:

vim.keymap.set('n', '<leader>fb', ":1,. SnipRun <CR>", {})
vim.keymap.set('n', '<leader>fv', ":let b:caret=winsaveview() <CR> | :1,. SnipRun <CR> | :call winrestview(b:caret) <CR>", {})
vim.keymap.set('n', '<leader>fc', ":let b:caret=winsaveview() <CR> | :1,. SnipRun <CR> | :sleep 1 | :call winrestview(b:caret) <CR>", {})

With this example python code:

test = "test"

def fun(test):
    return test 

print(fun(test))

And cursor positioned at 4,1, The function results are:

• <leader>fb: Outputs (no output) and puts the cursor on top.
• <leader>fv: Outputs RuntimeError: SyntaxError: 'return' outside function, cursor stays in place.
• <leader>fc: Outputs (no output), puts the cursor on top for one second, then moves it back to where it was.

I don't get why <leader>fv doesn't work correctly, but works if I add a sleep. Please help me figure this out.

[navlalli]

Hey @rinpatch
I believe this is more what you are looking for where this will run from lines 1 to 5 and should keep your cursor in the same position:

vim.keymap.set('n', '<leader>fv ', ":let b:caret=winsaveview() <CR> | :lua require'sniprun.api'.run_range(1, 5) <CR>| :call winrestview(b:caret) <CR>", {})

However, I wasn't able to figure out how to insert the current line number into run_range(1, 5) but hopefully there should be a way.

[rinpatch]

@navlalli I added the current line number like this:

vim.keymap.set('n', '<leader>fv', ":let b:caret=winsaveview() <CR> | :lua require'sniprun.api'.run_range(1, vim.api.nvim_win_get_cursor(0)[1]) <CR> | :call winrestview(b:caret) <CR>", {})

Seems to work perfectly so far. Thank you.

[michaelb]

Well done both of you 😂, I couldn't have suggested better answers.

This winsaveview() shenanigan is a bit ugly though, so I'll look into it someday