MunifTanjim/nui.nvim

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neovim-lua-development
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CREATED

2021-07-09

UPDATED

14 days ago


GitHub Workflow Status: CI Coverage License

nui.nvim

UI Component Library for Neovim.

Requirements

Installation

Install the plugins with your preferred plugin manager. For example, with vim-plug:

Plug 'MunifTanjim/nui.nvim'

Blocks

NuiText

Quickly add highlighted text on the buffer.

Check Detailed Documentation for nui.text

Check Wiki Page for nui.text

NuiLine

Quickly add line containing highlighted text chunks on the buffer.

Check Detailed Documentation for nui.line

Check Wiki Page for nui.line

NuiTree

Quickly render tree-like structured content on the buffer.

Check Detailed Documentation for nui.tree

Check Wiki Page for nui.tree

Components

Layout

Layout GIF

local Popup = require("nui.popup")
local Layout = require("nui.layout")

local popup_one, popup_two = Popup({
  enter = true,
  border = "single",
}), Popup({
  border = "double",
})

local layout = Layout(
  {
    position = "50%",
    size = {
      width = 80,
      height = "60%",
    },
  },
  Layout.Box({
    Layout.Box(popup_one, { size = "40%" }),
    Layout.Box(popup_two, { size = "60%" }),
  }, { dir = "row" })
)

local current_dir = "row"

popup_one:map("n", "r", function()
  if current_dir == "col" then
    layout:update(Layout.Box({
      Layout.Box(popup_one, { size = "40%" }),
      Layout.Box(popup_two, { size = "60%" }),
    }, { dir = "row" }))

    current_dir = "row"
  else
    layout:update(Layout.Box({
      Layout.Box(popup_two, { size = "60%" }),
      Layout.Box(popup_one, { size = "40%" }),
    }, { dir = "col" }))

    current_dir = "col"
  end
end, {})

layout:mount()

Check Detailed Documentation for nui.layout

Check Wiki Page for nui.layout

Popup GIF

local Popup = require("nui.popup")
local event = require("nui.utils.autocmd").event

local popup = Popup({
  enter = true,
  focusable = true,
  border = {
    style = "rounded",
  },
  position = "50%",
  size = {
    width = "80%",
    height = "60%",
  },
})

-- mount/open the component
popup:mount()

-- unmount component when cursor leaves buffer
popup:on(event.BufLeave, function()
  popup:unmount()
end)

-- set content
vim.api.nvim_buf_set_lines(popup.bufnr, 0, 1, false, { "Hello World" })

Check Detailed Documentation for nui.popup

Check Wiki Page for nui.popup

Input

Input GIF

local Input = require("nui.input")
local event = require("nui.utils.autocmd").event

local input = Input({
  position = "50%",
  size = {
    width = 20,
  },
  border = {
    style = "single",
    text = {
      top = "[Howdy?]",
      top_align = "center",
    },
  },
  win_options = {
    winhighlight = "Normal:Normal,FloatBorder:Normal",
  },
}, {
  prompt = "> ",
  default_value = "Hello",
  on_close = function()
    print("Input Closed!")
  end,
  on_submit = function(value)
    print("Input Submitted: " .. value)
  end,
})

-- mount/open the component
input:mount()

-- unmount component when cursor leaves buffer
input:on(event.BufLeave, function()
  input:unmount()
end)

Check Detailed Documentation for nui.input

Check Wiki Page for nui.input

Menu GIF

local Menu = require("nui.menu")
local event = require("nui.utils.autocmd").event

local menu = Menu({
  position = "50%",
  size = {
    width = 25,
    height = 5,
  },
  border = {
    style = "single",
    text = {
      top = "[Choose-an-Element]",
      top_align = "center",
    },
  },
  win_options = {
    winhighlight = "Normal:Normal,FloatBorder:Normal",
  },
}, {
  lines = {
    Menu.item("Hydrogen (H)"),
    Menu.item("Carbon (C)"),
    Menu.item("Nitrogen (N)"),
    Menu.separator("Noble-Gases", {
      char = "-",
      text_align = "right",
    }),
    Menu.item("Helium (He)"),
    Menu.item("Neon (Ne)"),
    Menu.item("Argon (Ar)"),
  },
  max_width = 20,
  keymap = {
    focus_next = { "j", "<Down>", "<Tab>" },
    focus_prev = { "k", "<Up>", "<S-Tab>" },
    close = { "<Esc>", "<C-c>" },
    submit = { "<CR>", "<Space>" },
  },
  on_close = function()
    print("Menu Closed!")
  end,
  on_submit = function(item)
    print("Menu Submitted: ", item.text)
  end,
})

-- mount the component
menu:mount()

Check Detailed Documentation for nui.menu

Check Wiki Page for nui.menu

Split

Split GIF

local Split = require("nui.split")
local event = require("nui.utils.autocmd").event

local split = Split({
  relative = "editor",
  position = "bottom",
  size = "20%",
})

-- mount/open the component
split:mount()

-- unmount component when cursor leaves buffer
split:on(event.BufLeave, function()
  split:unmount()
end)

Check Detailed Documentation for nui.split

Check Wiki Page for nui.split

Extendibility

Each of the blocks and components can be extended to add new methods or change their behaviors.

local Timer = Popup:extend("Timer")

function Timer:init(popup_options)
  local options = vim.tbl_deep_extend("force", popup_options or {}, {
    border = "double",
    focusable = false,
    position = { row = 0, col = "100%" },
    size = { width = 10, height = 1 },
    win_options = {
      winhighlight = "Normal:Normal,FloatBorder:SpecialChar",
    },
  })

  Timer.super.init(self, options)
end

function Timer:countdown(time, step, format)
  local function draw_content(text)
    local gap_width = 10 - vim.api.nvim_strwidth(text)
    vim.api.nvim_buf_set_lines(self.bufnr, 0, -1, false, {
      string.format(
        "%s%s%s",
        string.rep(" ", math.floor(gap_width / 2)),
        text,
        string.rep(" ", math.ceil(gap_width / 2))
      ),
    })
  end

  self:mount()

  local remaining_time = time

  draw_content(format(remaining_time))

  vim.fn.timer_start(step, function()
    remaining_time = remaining_time - step

    draw_content(format(remaining_time))

    if remaining_time <= 0 then
      self:unmount()
    end
  end, { ["repeat"] = math.ceil(remaining_time / step) })
end

local timer = Timer()

timer:countdown(10000, 1000, function(time)
  return tostring(time / 1000) .. "s"
end)

nui.object

A small object library is bundled with nui.nvim. It is, more or less, a clone of the kikito/middleclass library.

Check Wiki Page for nui.object

License

Licensed under the MIT License. Check the LICENSE file for details.