Function that return visually selected text

vzytoi · December 2, 2021, 7:56pm

I know this question have already been asked everywhere but I’ve tried everything and nothing seem to work fine for me. I’d like to have a function that when is called returns the string value of the text visually selected. Is there a way to make that in lua? Thanks for your time (:

kristijanhusak · December 2, 2021, 9:03pm

github.com

kristijanhusak/neovim-config/blob/master/nvim/lua/partials/search.lua#L27-L39

    
      
          local function get_visual_selection()
            local s_start = vim.fn.getpos("'<")
            local s_end = vim.fn.getpos("'>")
            local n_lines = math.abs(s_end[2] - s_start[2]) + 1
            local lines = vim.api.nvim_buf_get_lines(0, s_start[2] - 1, s_end[2], false)
            lines[1] = string.sub(lines[1], s_start[3], -1)
            if n_lines == 1 then
              lines[n_lines] = string.sub(lines[n_lines], 1, s_end[3] - s_start[3] + 1)
            else
              lines[n_lines] = string.sub(lines[n_lines], 1, s_end[3])
            end
            return table.concat(lines, '\n')
          end

vzytoi · December 2, 2021, 9:28pm

It seem to work, but either the line returned isn’t the one I selected or I have this error bad argument #1 to 'sub' (string expected got nil) (the error is on this line : lines[1] = string.sub(lines[1], s_start[3], -1)).
Thanks for your answer

EDIT: I did some debug and this just had to do with the way I was calling the function. Thank you this works really well! Have a nice day (:

chas-kane · August 30, 2022, 6:52am

I’m seeing the same error, what’s the correct way to call it?

kristijanhusak · August 30, 2022, 8:54am

If you are calling it from the mapping ,make sure to prefix it with <C-u>. Here’s an example neovim-config/search.lua at master · kristijanhusak/neovim-config · GitHub

lstanard · June 29, 2023, 9:11pm

The link provided by @kristijanhusak is no longer available and I’m seeing the same error. @vzytoi could you provide some details on what you did to get this working? Thanks!

kristijanhusak · June 30, 2023, 8:51am

Here’s the updated link

github.com

kristijanhusak/neovim-config/blob/master/nvim/after/plugin/search.lua#L38


      
          })
          vim.api.nvim_create_autocmd('QuickFixCmdPost', {
            pattern = 'l*',
            command = 'lwindow',
            nested = true,
            group = search_group,
          })
          
          vim.keymap.set('n', '<Leader>f', ':call v:lua.kris.search.run("")<CR>', { silent = true })
          vim.keymap.set('n', '<Leader>F', ':call v:lua.kris.search.run(expand("<cword>"))<CR>', { silent = true })
          vim.keymap.set('v', '<Leader>F', ':<C-u>call v:lua.kris.search.run("", 1)<CR>', { silent = true })
          
          local function cleanup(no_reset_mode)
            is_toggle = false
            if not no_reset_mode then
              mode = 'term'
            end
            return pcall(vim.keymap.del, 'c', '<tab>')
          end
          
          local function msg(txt)

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Function that return visually selected text

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