Telescope dynamic height

repro.lua

local root = vim.fn.fnamemodify("./.repro", ":p")
-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
    vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end
-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
    vim.fn.system({
        "git",
        "clone",
        "--filter=blob:none",
        "--single-branch",
        "https://github.com/folke/lazy.nvim.git",
        lazypath,
    })
end

_G.last = nil
local function on_complete(bo_line, bo_line_side, origin_height)
    bo_line = "╰" .. string.rep("─", #bo_line - 2) .. "╯"
    bo_line_side = "│" .. string.rep(" ", #bo_line_side - 2) .. "│"
    vim.schedule(function()
        local action_state = require("telescope.actions.state")
        local prompt_bufnr = require("telescope.state").get_existing_prompt_bufnrs()[1]

        local picker = action_state.get_current_picker(prompt_bufnr)
        if picker == nil then
            return
        end
        if not vim.api.nvim_buf_is_valid(picker.results_bufnr) then
            return
        end
        local count = vim.api.nvim_buf_line_count(picker.results_bufnr)
        local top_win = vim.api.nvim_win_get_config(picker.results_win)
        local buttom_buf = vim.api.nvim_win_get_buf(picker.results_win + 1)
        local bottom_win = vim.api.nvim_win_get_config(picker.results_win + 1)
        top_win.height = math.max(count, 1)
        top_win.height = math.min(top_win.height, origin_height)
        bottom_win.height = math.max(count + 2, 3)
        bottom_win.height = math.min(bottom_win.height, origin_height + 2)
        vim.api.nvim_win_set_config(picker.results_win + 1, bottom_win)
        vim.api.nvim_win_set_config(picker.results_win, top_win)
        if _G.last ~= nil then
            vim.api.nvim_buf_set_lines(buttom_buf, _G.last, _G.last + 1, false, { bo_line_side })
        end
        vim.api.nvim_buf_set_lines(buttom_buf, math.max(count + 1, 2), math.max(count + 2, 3), false, { bo_line })
        _G.last = math.max(count + 1, 2)
    end)
end

vim.opt.runtimepath:prepend(lazypath)
-- install plugins
local plugins = {
    -- do not remove the colorscheme!
    "folke/tokyonight.nvim",
    {
        "nvim-telescope/telescope.nvim",
        keys = {
            {
                "<space>ff",
                function()
                    require("telescope.builtin").find_files({
                        on_complete = {
                            function()
                                on_complete(string.rep(" ", 60), string.rep(" ", 60), 18)
                            end,
                        },
                        layout_strategy = "horizontal",
                        borderchars = { "─", "│", "─", "│", "╭", "╮", "╯", "╰" },
                        previewer = false,
                        sorting_strategy = "ascending",
                        layout_config = {
                            horizontal = {
                                width = 0.35,
                                height = 0.7,
                            },
                            prompt_position = "top",
                            mirror = false,
                        },
                    })
                end,
            },
        },
        dependencies = { "nvim-lua/plenary.nvim" },
        config = function()
            require("telescope").setup({})
        end,
    },
}
require("lazy").setup(plugins, {
    root = root .. "/plugins",
})

-- local-
vim.cmd([[colorscheme tokyonight]])

What you need to adjust is this line

on_complete(string.rep(" ", 60), string.rep(" ", 60), 18)

the first two argument should be the initial width of your picker, and last one is the initial height.

Run with nvim -u ~/.config/nvim/repro.lua ~/.config/nvim/init.lua to get a feel of it.

iShot_2025-03-12_03.22.03.mp4

This is super cool! Any idea how to adjust the on_complete function for it to work with the ivy theme ?

Not sure, I would imagine you both cut the height and move the position of windows down