Update installation doc

1. For python and lua, rely on LSP for folding
2. show fold signs on the right of the number column

README.md

@@ -13,7 +13,7 @@
       <img alt="Latest release" src="https://img.shields.io/github/v/release/jdhao/nvim-config" />
     </a>
     <a href="https://github.com/neovim/neovim/releases/tag/stable">
-      <img src="https://img.shields.io/badge/Neovim-0.9.5-blueviolet.svg?style=flat-square&logo=Neovim&logoColor=green" alt="Neovim minimum version"/>
+      <img src="https://img.shields.io/badge/Neovim-0.10.1-blueviolet.svg?style=flat-square&logo=Neovim&logoColor=green" alt="Neovim minimum version"/>
     </a>
     <a href="https://github.com/jdhao/nvim-config/search?l=vim-script">
       <img src="https://img.shields.io/github/languages/top/jdhao/nvim-config" alt="Top languages"/>
@@ -21,8 +21,8 @@
     <a href="https://github.com/jdhao/nvim-config/graphs/commit-activity">
       <img src="https://img.shields.io/github/commit-activity/m/jdhao/nvim-config?style=flat-square" />
     </a>
-    <a href="https://github.com/jdhao/nvim-config/releases/tag/v0.9.5">
-      <img src="https://img.shields.io/github/commits-since/jdhao/nvim-config/v0.9.5?style=flat-square" />
+    <a href="https://github.com/jdhao/nvim-config/releases/tag/v0.10.0">
+      <img src="https://img.shields.io/github/commits-since/jdhao/nvim-config/v0.10.0?style=flat-square" />
     </a>
     <a href="https://github.com/jdhao/nvim-config/graphs/contributors">
       <img src="https://img.shields.io/github/contributors/jdhao/nvim-config?style=flat-square" />
@@ -169,8 +169,8 @@ Some of the shortcuts I use frequently are listed here. In the following shortcu
 | `<leader>gc`      | Normal        | Linux/macOS/Win | Run git commit                                                           |
 | `<leader>gpl`     | Normal        | Linux/macOS/Win | Run git pull                                                             |
 | `<leader>gpu`     | Normal        | Linux/macOS/Win | Run git push                                                             |
-| `<leader>gl`      | Normal/Visual | Linux/macOS/Win | Get perm link for current/visually-select lines
-| `<leader>gb`      | Normal        | macOS           | Browse current git repo in browser
+| `<leader>gl`      | Normal/Visual | Linux/macOS/Win | Get perm link for current/visually-select lines                          |
+| `<leader>gb`      | Normal        | macOS           | Browse current git repo in browser                                       |
 | `<F9>`            | Normal        | Linux/macOS/Win | Compile&run current source file (for C++, LaTeX, Lua, Python)            |
 | `<F11>`           | Normal        | Linux/macOS/Win | Toggle spell checking                                                    |
 | `<F12>`           | Normal        | Linux/macOS/Win | Toggle paste mode                                                        |

after/ftplugin/lua.vim

@@ -3,7 +3,3 @@ set formatoptions-=o
 set formatoptions-=r
 
 nnoremap <buffer><silent> <F9> :luafile %<CR>
-
-" Use nvim-treesitter for folding
-set foldmethod=expr
-set foldexpr=nvim_treesitter#foldexpr()

after/ftplugin/python.vim

@@ -12,7 +12,3 @@ set tabstop=4       " number of visual spaces per TAB
 set softtabstop=4   " number of spaces in tab when editing
 set shiftwidth=4    " number of spaces to use for autoindent
 set expandtab       " expand tab to spaces so that tabs are spaces
-
-" Use nvim-treesitter for folding
-set foldmethod=expr
-set foldexpr=nvim_treesitter#foldexpr()

docs/README.md

@@ -118,16 +118,16 @@ The version of Git on the Linux system may be too old so that plugins may break.
 Check [here](https://jdhao.github.io/2021/03/27/upgrade_git_on_linux/) on how to install and set up the latest version of Git.
 For Windows, install [Git for Windows](https://git-scm.com/download/win) and make sure you can run `git` from command line.
 
-### ctags
+### universal-ctags
 
 In order to use tags related plugins such as [vista.vim](https://github.com/liuchengxu/vista.vim), we need to install a ctags distribution.
 Universal-ctags is preferred.
 
 To install it on Linux, we need to build it from source. See [here](https://askubuntu.com/a/836521/768311) for the details.
-To install ctags on macOS, use [Homebrew](https://github.com/universal-ctags/homebrew-universal-ctags):
+To install ctags on macOS, use [Homebrew](https://formulae.brew.sh/formula/universal-ctags):
 
 ```bash
-brew install ctags
+brew install universal-ctags
 ```
 
 To install it Windows, use [chocolatey](https://chocolatey.org/) or [scoop](https://scoop.sh/)
@@ -166,35 +166,9 @@ Set their PATH properly and make sure you can run `pylint`, `flake8` and `vint`
 There are various ways to install Nvim depending on your system.
 This config is only maintained for [the latest nvim stable release](https://github.com/neovim/neovim/releases/tag/stable).
 
-### Linux
+Please check the official doc on how to install Neovim on different systems: https://github.com/neovim/neovim/blob/master/INSTALL.md
 
-You can directly download the binary release from [here](https://github.com/neovim/neovim/releases/download/stable/nvim-linux64.tar.gz).
-You can also use the system package manager to install nvim,
-but that is not reliable since the latest version may not be available.
-
-### Windows
-
-You may download from [nvim release](https://github.com/neovim/neovim/releases/download/stable/nvim-win64.zip) from GitHub and manually extract it.
-
-Another way to install Nvim on Windows is via chocolatey or scoop:
-
-```
-choco install neovim
-
-# via scoop
-# scoop bucket add versions
-# scoop install neovim
-```
-
-### macOS
-
-It is recommended to install neovim via [Homebrew](https://brew.sh/) on macOS. Simply run the following command:
-
-```bash
-brew install neovim
-```
-
-After installing Nvim, we need to set the path to nvim correctly.
+After installing Nvim, we need to set the PATH to nvim correctly.
 **Make sure that you can run `nvim` from the command line after all these setups**.
 
 ## Setting up Nvim

init.lua

@@ -14,15 +14,21 @@ vim.loader.enable()
 local version = vim.version
 
 -- check if we have the latest stable version of nvim
-local expected_ver = "0.10.0"
-local ev = version.parse(expected_ver)
-local actual_ver = version()
+local expected_ver_str = "0.10.1"
+local expect_ver = version.parse(expected_ver_str)
+local actual_ver = vim.version()
 
-local result = version.cmp(ev, {actual_ver.major, actual_ver.minor, actual_ver.patch})
+if expect_ver == nil then
+  local msg = string.format("Unsupported version string: %s", expected_ver_str)
+  vim.api.nvim_err_writeln(msg)
+  return
+end
+
+local result = version.cmp(expect_ver, actual_ver)
 
 if  result ~= 0 then
   local _ver = string.format("%s.%s.%s", actual_ver.major, actual_ver.minor, actual_ver.patch)
-  local msg = string.format("Expect nvim %s, but got %s instead. Use at your own risk!", expected_ver, _ver)
+  local msg = string.format("Expect nvim %s, but got %s instead. Use at your own risk!", expected_ver_str, _ver)
   vim.api.nvim_err_writeln(msg)
 end
 

lua/colorschemes.lua

@@ -24,9 +24,9 @@ M.colorscheme_conf = {
   end,
   gruvbox_material = function()
     -- foreground option can be material, mix, or original
-    vim.g.gruvbox_material_foreground = "material"
+    vim.g.gruvbox_material_foreground = "original"
     --background option can be hard, medium, soft
-    vim.g.gruvbox_material_background = "soft"
+    vim.g.gruvbox_material_background = "medium"
     vim.g.gruvbox_material_enable_italic = 1
     vim.g.gruvbox_material_better_performance = 1
 
@@ -56,6 +56,12 @@ M.colorscheme_conf = {
     vim.g.material_style = "oceanic"
     vim.cmd('colorscheme material')
   end,
+  arctic = function ()
+    vim.cmd("colorscheme arctic")
+  end,
+  kanagawa = function()
+    vim.cmd("colorscheme kanagawa-wave")
+  end
 }
 
 --- Use a random colorscheme from the pre-defined list of colorschemes.

lua/config/fugitive.lua

@@ -6,6 +6,7 @@ keymap.set("n", "<leader>gc", "<cmd>Git commit<cr>", { desc = "Git commit" })
 keymap.set("n", "<leader>gd", "<cmd>Gdiffsplit<cr>", { desc = "Git diff" })
 keymap.set("n", "<leader>gpl", "<cmd>Git pull<cr>", { desc = "Git pull" })
 keymap.set("n", "<leader>gpu", "<cmd>15 split|term git push<cr>", { desc = "Git push" })
+keymap.set("v", "<leader>gb", ":Git blame<cr>", { desc = "Git blame line" })
 
 -- convert git to Git in command line mode
-vim.fn['utils#Cabbrev']('git', 'Git')
+vim.fn["utils#Cabbrev"]("git", "Git")

lua/config/hlslens.lua

@@ -35,14 +35,32 @@ keymap.set("n", "N", "", {
   end,
 })
 
+local no_word_under_cursor = function()
+  local cursor_word = vim.fn.expand("<cword>")
+
+  local result = cursor_word == ""
+  if result then
+    local msg = "E348: No string under cursor"
+    api.nvim_err_writeln(msg)
+  end
+
+  return result
+end
+
 keymap.set("n", "*", "", {
   callback = function()
+    if no_word_under_cursor() then
+      return
+    end
     vim.fn.execute("normal! *N")
     hlslens.start()
   end,
 })
 keymap.set("n", "#", "", {
   callback = function()
+    if no_word_under_cursor() then
+      return
+    end
     vim.fn.execute("normal! #N")
     hlslens.start()
   end,

lua/config/lsp.lua

@@ -231,11 +231,12 @@ if utils.executable("lua-language-server") then
         },
         workspace = {
           -- Make the server aware of Neovim runtime files,
-          -- see also https://github.com/LuaLS/lua-language-server/wiki/Libraries#link-to-workspace .
-          -- Lua-dev.nvim also has similar settings for lua ls, https://github.com/folke/neodev.nvim/blob/main/lua/neodev/luals.lua .
+          -- see also https://luals.github.io/wiki/settings/#workspacelibrary
           library = {
             vim.env.VIMRUNTIME,
             fn.stdpath("config"),
+            -- make lua_ls aware of functions under vim.uv
+            "${3rd}/luv/library"
           },
           maxPreload = 2000,
           preloadFileSize = 50000,

lua/config/nvim_ufo.lua

@@ -0,0 +1,45 @@
+local handler = function(virtText, lnum, endLnum, width, truncate)
+  local newVirtText = {}
+  local foldedLines = endLnum - lnum
+  local suffix = (" 󰁂  %d"):format(foldedLines)
+  local sufWidth = vim.fn.strdisplaywidth(suffix)
+  local targetWidth = width - sufWidth
+  local curWidth = 0
+
+  for _, chunk in ipairs(virtText) do
+    local chunkText = chunk[1]
+    local chunkWidth = vim.fn.strdisplaywidth(chunkText)
+    if targetWidth > curWidth + chunkWidth then
+      table.insert(newVirtText, chunk)
+    else
+      chunkText = truncate(chunkText, targetWidth - curWidth)
+      local hlGroup = chunk[2]
+      table.insert(newVirtText, { chunkText, hlGroup })
+      chunkWidth = vim.fn.strdisplaywidth(chunkText)
+      -- str width returned from truncate() may less than 2nd argument, need padding
+      if curWidth + chunkWidth < targetWidth then
+        suffix = suffix .. (" "):rep(targetWidth - curWidth - chunkWidth)
+      end
+      break
+    end
+    curWidth = curWidth + chunkWidth
+  end
+  local rAlignAppndx = math.max(math.min(vim.opt.textwidth["_value"], width - 1) - curWidth - sufWidth, 0)
+  suffix = (" "):rep(rAlignAppndx) .. suffix
+  table.insert(newVirtText, { suffix, "MoreMsg" })
+  return newVirtText
+end
+
+local opts = {}
+opts["fold_virt_text_handler"] = handler
+
+require("ufo").setup(opts)
+
+vim.keymap.set("n", "zR", require("ufo").openAllFolds)
+vim.keymap.set("n", "zM", require("ufo").closeAllFolds)
+vim.keymap.set("n", "zr", require("ufo").openFoldsExceptKinds)
+vim.keymap.set("n", "<leader>K", function()
+  local _ = require("ufo").peekFoldedLinesUnderCursor()
+end, {
+  desc = "Preview folded maps",
+})

lua/config/statusline.lua

@@ -99,12 +99,12 @@ end
 
 local virtual_env = function()
   -- only show virtual env for Python
-  if vim.bo.filetype ~= 'python' then
+  if vim.bo.filetype ~= "python" then
     return ""
   end
 
-  local conda_env = os.getenv('CONDA_DEFAULT_ENV')
-  local venv_path = os.getenv('VIRTUAL_ENV')
+  local conda_env = os.getenv("CONDA_DEFAULT_ENV")
+  local venv_path = os.getenv("VIRTUAL_ENV")
 
   if venv_path == nil then
     if conda_env == nil then
@@ -113,17 +113,33 @@ local virtual_env = function()
       return string.format("  %s (conda)", conda_env)
     end
   else
-    local venv_name = vim.fn.fnamemodify(venv_path, ':t')
+    local venv_name = vim.fn.fnamemodify(venv_path, ":t")
     return string.format("  %s (venv)", venv_name)
   end
 end
 
+local get_active_lsp = function()
+  local msg = "No Active Lsp"
+  local buf_ft = vim.api.nvim_get_option_value("filetype", {})
+  local clients = vim.lsp.get_clients { bufnr = 0 }
+  if next(clients) == nil then
+    return msg
+  end
+
+  for _, client in ipairs(clients) do
+    ---@diagnostic disable-next-line: undefined-field
+    local filetypes = client.config.filetypes
+    if filetypes and vim.fn.index(filetypes, buf_ft) ~= -1 then
+      return client.name
+    end
+  end
+  return msg
+end
+
 require("lualine").setup {
   options = {
     icons_enabled = true,
     theme = "auto",
-    -- component_separators = { left = "", right = "" },
-    -- section_separators = { left = "", right = "" },
     section_separators = "",
     component_separators = "",
     disabled_filetypes = {},
@@ -132,18 +148,29 @@ require("lualine").setup {
   sections = {
     lualine_a = { "mode" },
     lualine_b = {
-      "branch",
+      {
+        "branch",
+        fmt = function(name, _)
+          -- truncate branch name in case the name is too long
+          return string.sub(name, 1, 20)
+        end,
+      },
+      {
+        virtual_env,
+        color = { fg = "black", bg = "#F1CA81" },
+      },
+    },
+    lualine_c = {
+      {
+        "filename",
+        symbols = {
+          readonly = "[🔒]",
+        },
+      },
       {
         "diff",
         source = diff,
       },
-      {
-        virtual_env,
-        color = { fg = 'black', bg = "#F1CA81" }
-      }
-    },
-    lualine_c = {
-      "filename",
       {
         ime_state,
         color = { fg = "black", bg = "#f46868" },
@@ -152,13 +179,19 @@ require("lualine").setup {
         spell,
         color = { fg = "black", bg = "#a7c080" },
       },
+    },
+    lualine_x = {
+      {
+        get_active_lsp,
+        icon = " LSP:",
+      },
       {
         "diagnostics",
         sources = { "nvim_diagnostic" },
-        symbols = {error = '🆇 ', warn = '⚠️ ', info = 'ℹ️ ', hint = ' '},
+        symbols = { error = "🆇 ", warn = "⚠️ ", info = "ℹ️ ", hint = " " },
       },
     },
-    lualine_x = {
+    lualine_y = {
       "encoding",
       {
         "fileformat",
@@ -170,9 +203,6 @@ require("lualine").setup {
       },
       "filetype",
     },
-    lualine_y = {
-      "location",
-    },
     lualine_z = {
       {
         trailing_space,
@@ -182,6 +212,7 @@ require("lualine").setup {
         mixed_indent,
         color = "WarningMsg",
       },
+      "progress"
     },
   },
   inactive_sections = {

lua/mappings.lua

@@ -1,5 +1,4 @@
 local keymap = vim.keymap
-local api = vim.api
 local uv = vim.uv
 
 -- Save key strokes (now we do not need to press shift to enter command mode).
@@ -215,6 +214,9 @@ keymap.set("n", "<leader>cb", function()
   local cnt = 0
   local blink_times = 7
   local timer = uv.new_timer()
+  if timer == nil then
+    return
+  end
 
   timer:start(0, 100, vim.schedule_wrap(function()
     vim.cmd [[

lua/plugin_specs.lua

@@ -1,6 +1,7 @@
 local utils = require("utils")
 
-local lazypath = vim.fn.stdpath("data") .. "/lazy/lazy.nvim"
+local plugin_dir = vim.fn.stdpath("data") .. "/lazy"
+local lazypath = plugin_dir .. "/lazy.nvim"
 
 if not vim.uv.fs_stat(lazypath) then
   vim.fn.system {
@@ -108,8 +109,12 @@ local plugin_specs = {
     "Yggdroot/LeaderF",
     cmd = "Leaderf",
     build = function()
+      local leaderf_path = plugin_dir .. "/LeaderF"
+      vim.opt.runtimepath:append(leaderf_path)
+      vim.cmd("runtime! plugin/leaderf.vim")
+
       if not vim.g.is_win then
-        vim.cmd(":LeaderfInstallCExtension")
+        vim.cmd("LeaderfInstallCExtension")
       end
     end,
   },
@@ -122,9 +127,10 @@ local plugin_specs = {
     },
   },
   {
-    "lukas-reineke/headlines.nvim",
-    dependencies = "nvim-treesitter/nvim-treesitter",
-    config = true, -- or `opts = {}`
+    "MeanderingProgrammer/markdown.nvim",
+    main = "render-markdown",
+    opts = {},
+    dependencies = { "nvim-treesitter/nvim-treesitter", "nvim-tree/nvim-web-devicons" },
   },
   -- A list of colorscheme plugin you may want to try. Find what suits you.
   { "navarasu/onedark.nvim", lazy = true },
@@ -136,7 +142,13 @@ local plugin_specs = {
   { "catppuccin/nvim", name = "catppuccin", lazy = true },
   { "olimorris/onedarkpro.nvim", lazy = true },
   { "marko-cerovac/material.nvim", lazy = true },
-
+  {
+    "rockyzhang24/arctic.nvim",
+    dependencies = { "rktjmp/lush.nvim" },
+    name = "arctic",
+    branch = "v2",
+  },
+  { "rebelot/kanagawa.nvim", lazy = true },
   { "nvim-tree/nvim-web-devicons", event = "VeryLazy" },
 
   {
@@ -169,12 +181,41 @@ local plugin_specs = {
   {
     "lukas-reineke/indent-blankline.nvim",
     event = "VeryLazy",
-    main = 'ibl',
+    main = "ibl",
     config = function()
       require("config.indent-blankline")
     end,
   },
-
+  {
+    "luukvbaal/statuscol.nvim",
+    opts = {},
+    config = function()
+      local builtin = require("statuscol.builtin")
+      require("statuscol").setup {
+        relculright = true,
+        segments = {
+          { text = { "%s" }, click = "v:lua.ScSa" },
+          { text = { builtin.lnumfunc, " " }, click = "v:lua.ScLa" },
+          { text = { builtin.foldfunc, " " }, condition = {true, builtin.not_empty}, click = "v:lua.ScFa" },
+        },
+      }
+    end,
+  },
+  {
+    "kevinhwang91/nvim-ufo",
+    dependencies = "kevinhwang91/promise-async",
+    event = "VeryLazy",
+    opts = {},
+    init = function()
+      vim.o.foldcolumn = "1" -- '0' is not bad
+      vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
+      vim.o.foldlevelstart = 99
+      vim.o.foldenable = true
+    end,
+    config = function()
+      require("config.nvim_ufo")
+    end,
+  },
   -- Highlight URLs inside vim
   { "itchyny/vim-highlighturl", event = "VeryLazy" },
 
@@ -222,9 +263,9 @@ local plugin_specs = {
 
   -- Automatic insertion and deletion of a pair of characters
   {
-      'windwp/nvim-autopairs',
-      event = "InsertEnter",
-      config = true
+    "windwp/nvim-autopairs",
+    event = "InsertEnter",
+    config = true,
   },
 
   -- Comment plugin
@@ -316,7 +357,7 @@ local plugin_specs = {
   { "rhysd/committia.vim", lazy = true },
 
   {
-    "sindrets/diffview.nvim"
+    "sindrets/diffview.nvim",
   },
 
   {
@@ -418,17 +459,26 @@ local plugin_specs = {
   {
     "glacambre/firenvim",
     enabled = function()
-      if vim.g.is_win or vim.g.is_mac then
-        return true
-      end
-      return false
+      local result = vim.g.is_win or vim.g.is_mac
+      return result
     end,
+    -- it seems that we can only call the firenvim function directly.
+    -- Using vim.fn or vim.cmd to call this function will fail.
     build = function()
-      vim.fn["firenvim#install"](0)
-    end,
-    lazy = true,
-  },
+      local firenvim_path = plugin_dir .. "/firenvim"
+      vim.opt.runtimepath:append(firenvim_path)
+      vim.cmd("runtime! firenvim.vim")
 
+      -- macOS will reset the PATH when firenvim starts a nvim process, causing the PATH variable to change unexpectedly.
+      -- Here we are trying to get the correct PATH and use it for firenvim.
+      -- See also https://github.com/glacambre/firenvim/blob/master/TROUBLESHOOTING.md#make-sure-firenvims-path-is-the-same-as-neovims
+      local path_env = vim.env.PATH
+      local prologue = string.format('export PATH="%s"', path_env)
+      -- local prologue = "echo"
+      local cmd_str = string.format(":call firenvim#install(0, '%s')", prologue)
+      vim.cmd(cmd_str)
+    end,
+  },
   -- Debugger plugin
   {
     "sakhnik/nvim-gdb",
@@ -477,7 +527,7 @@ local plugin_specs = {
   -- file explorer
   {
     "nvim-tree/nvim-tree.lua",
-    keys = { "<space>s" },
+    event = "VeryLazy",
     dependencies = { "nvim-tree/nvim-web-devicons" },
     config = function()
       require("config.nvim-tree")
@@ -494,13 +544,14 @@ local plugin_specs = {
   },
 }
 
--- configuration for lazy itself.
-local lazy_opts = {
+require("lazy").setup {
+  spec = plugin_specs,
   ui = {
     border = "rounded",
     title = "Plugin Manager",
     title_pos = "center",
   },
+  rocks = {
+    enabled = false,
+  },
 }
-
-require("lazy").setup(plugin_specs, lazy_opts)

lua/utils.lua

@@ -11,9 +11,8 @@ function M.executable(name)
 end
 
 --- check whether a feature exists in Nvim
---- @feat: string
----   the feature name, like `nvim-0.7` or `unix`.
---- return: bool
+--- @param feat string the feature name, like `nvim-0.7` or `unix`.
+--- @return boolean
 M.has = function(feat)
   if fn.has(feat) == 1 then
     return true
@@ -33,8 +32,9 @@ end
 
 --- Generate random integers in the range [Low, High], inclusive,
 --- adapted from https://stackoverflow.com/a/12739441/6064933
---- @low: the lower value for this range
---- @high: the upper value for this range
+--- @param low integer the lower value for this range
+--- @param high integer the upper value for this range
+--- @return integer
 function M.rand_int(low, high)
   -- Use lua to generate random int, see also: https://stackoverflow.com/a/20157671/6064933
   math.randomseed(os.time())
@@ -43,17 +43,11 @@ function M.rand_int(low, high)
 end
 
 --- Select a random element from a sequence/list.
---- @seq: the sequence to choose an element
+--- @param seq any[] the sequence to choose an element
 function M.rand_element(seq)
   local idx = M.rand_int(1, #seq)
 
   return seq[idx]
 end
 
-function M.add_pack(name)
-  local status, error = pcall(vim.cmd, "packadd " .. name)
-
-  return status
-end
-
 return M

spell/en.utf-8.add

@@ -467,3 +467,6 @@ pylintrc
 PYTHONPATH
 Uvicorn
 qpdf
+Elasticsearch
+kibana
+submodule

viml_conf/options.vim

@@ -1,11 +1,14 @@
 scriptencoding utf-8
 
 " change fillchars for folding, vertical split, end of buffer, and message separator
-set fillchars=fold:\ ,vert:\│,eob:\ ,msgsep:‾,diff:╱
+set fillchars=fold:\ ,foldsep:\ ,foldopen:,foldclose:,vert:\│,eob:\ ,msgsep:‾,diff:╱
 
 " Split window below/right when creating horizontal/vertical windows
 set splitbelow splitright
 
+" avoid the flickering when splitting window horizontal
+set splitkeep=screen
+
 " Time in milliseconds to wait for a mapped sequence to complete,
 " see https://unix.stackexchange.com/q/36882/221410 for more info
 set timeoutlen=500

viml_conf/plugins.vim

@@ -58,16 +58,6 @@ endif
 " Only fuzzy-search files names
 let g:Lf_DefaultMode = 'FullPath'
 
-" Popup window settings
-let w = float2nr(&columns * 0.8)
-if w > 140
-  let g:Lf_PopupWidth = 140
-else
-  let g:Lf_PopupWidth = w
-endif
-
-let g:Lf_PopupPosition = [0, float2nr((&columns - g:Lf_PopupWidth)/2)]
-
 " Do not use version control tool to list files under a directory since
 " submodules are not searched by default.
 let g:Lf_UseVersionControlTool = 0