Refacto: rewrite everything

- The tree is created with libuv functions, which makes it blazingly fast.
- The tree may now be faster than any other vim trees, it can handle directories with thousands of files without any latency at all (tested on 40K files, works flawlessly).
- More solid logic for opening and closing the tree.
- tree state is remembered (closing / opening a folder keeps opened subdirectories open)
- detection of multiple git projects in the tree
- more icon support
- smart rendering
- smart updates
- ms windows support
- gx replacement function running xdg-open on linux, open on macos

lua/lib/colors.lua

@@ -1,11 +1,33 @@
 local api = vim.api
-local get_colors = require 'lib/config'.get_colors
-
-local colors = get_colors()
 
 local M = {}
 
-local function create_hl() 
+local function get_color_from_hl(hl_name, fallback)
+  local id = vim.api.nvim_get_hl_id_by_name(hl_name)
+  if not id then return fallback end
+
+  local hl = vim.api.nvim_get_hl_by_id(id, true)
+  if not hl or not hl.foreground then return fallback end
+
+  return hl.foreground
+end
+
+local function get_colors()
+  return {
+    red      = vim.g.terminal_color_1  or get_color_from_hl('Keyword', 'Red'),
+    green    = vim.g.terminal_color_2  or get_color_from_hl('Character', 'Green'),
+    yellow   = vim.g.terminal_color_3  or get_color_from_hl('PreProc', 'Yellow'),
+    blue     = vim.g.terminal_color_4  or get_color_from_hl('Include', 'Blue'),
+    purple   = vim.g.terminal_color_5  or get_color_from_hl('Define', 'Purple'),
+    cyan     = vim.g.terminal_color_6  or get_color_from_hl('Conditional', 'Cyan'),
+    dark_red = vim.g.terminal_color_9  or get_color_from_hl('Keyword', 'DarkRed'),
+    orange   = vim.g.terminal_color_11 or get_color_from_hl('Number', 'Orange'),
+  }
+end
+
+local function get_hl_groups() 
+  local colors = get_colors()
+
   return {
     Symlink = { gui = 'bold', fg = colors.cyan },
     FolderIcon = { fg = '#90a4ae' },
@@ -13,14 +35,22 @@ local function create_hl()
     ExecFile = { gui = 'bold', fg = colors.green },
     SpecialFile = { gui = 'bold,underline', fg = colors.yellow },
     ImageFile = { gui = 'bold', fg = colors.purple },
-    MarkdownFile = { fg = colors.purple },
+
+    GitDirty = { fg = colors.dark_red },
+    GitStaged = { fg = colors.green },
+    GitMerge = { fg = colors.orange },
+    GitRenamed = { fg = colors.purple },
+    GitNew = { fg = colors.yellow },
+
+    -- TODO: remove those when we add this to nvim-web-devicons
+    MarkdownIcon = { fg = colors.purple },
     LicenseIcon = { fg = colors.yellow },
     YamlIcon = { fg = colors.yellow },
     TomlIcon = { fg = colors.yellow },
     GitignoreIcon = { fg = colors.yellow },
     JsonIcon = { fg = colors.yellow },
-
     LuaIcon = { fg = '#42a5f5' },
+    GoIcon = { fg = '#7Fd5EA' },
     PythonIcon = { fg = colors.green },
     ShellIcon = { fg = colors.green },
     JavascriptIcon = { fg = colors.yellow },
@@ -30,35 +60,62 @@ local function create_hl()
     RustIcon = { fg = colors.orange },
     VimIcon = { fg = colors.green },
     TypescriptIcon = { fg = colors.blue },
-
-    GitDirty = { fg = colors.dark_red },
-    GitStaged = { fg = colors.green },
-    GitMerge = { fg = colors.orange },
-    GitRenamed = { fg = colors.purple },
-    GitNew = { fg = colors.yellow }
   }
 end
 
-local HIGHLIGHTS = create_hl()
-
-local LINKS = {
-  FolderName = 'Directory',
-  Normal = 'Normal',
-  EndOfBuffer = 'EndOfBuffer',
-  CursorLine = 'CursorLine',
-  VertSplit = 'VertSplit',
-  CursorColumn = 'CursorColumn'
+-- TODO: remove those when we add this to nvim-web-devicons
+M.hl_groups = {
+  ['LICENSE'] = 'LicenseIcon';
+  ['license'] = 'LicenseIcon';
+  ['vim'] = 'VimIcon';
+  ['.vimrc'] = 'VimIcon';
+  ['c'] = 'CIcon';
+  ['cpp'] = 'CIcon';
+  ['python'] = 'PythonIcon';
+  ['lua'] = 'LuaIcon';
+  ['rs'] = 'RustIcon';
+  ['sh'] = 'ShellIcon';
+  ['csh'] = 'ShellIcon';
+  ['zsh'] = 'ShellIcon';
+  ['bash'] = 'ShellIcon';
+  ['md'] = 'MarkdownIcon';
+  ['json'] = 'JsonIcon';
+  ['toml'] = 'TomlIcon';
+  ['go'] = 'GoIcon';
+  ['yaml'] = 'YamlIcon';
+  ['yml'] = 'YamlIcon';
+  ['conf'] = 'GitignoreIcon';
+  ['javascript'] = 'JavascriptIcon';
+  ['typescript'] = 'TypescriptIcon';
+  ['jsx'] = 'ReactIcon';
+  ['tsx'] = 'ReactIcon';
+  ['htm'] = 'HtmlIcon';
+  ['html'] = 'HtmlIcon';
+  ['slim'] = 'HtmlIcon';
+  ['haml'] = 'HtmlIcon';
+  ['ejs'] = 'HtmlIcon';
 }
 
-function M.init_colors()
-  colors = get_colors()
-  HIGHLIGHTS = create_hl()
-  for k, d in pairs(HIGHLIGHTS) do
+local function get_links() 
+  return {
+    FolderName = 'Directory',
+    Normal = 'Normal',
+    EndOfBuffer = 'EndOfBuffer',
+    CursorLine = 'CursorLine',
+    VertSplit = 'VertSplit',
+    CursorColumn = 'CursorColumn'
+  }
+end
+
+function M.setup()
+  local higlight_groups = get_hl_groups()
+  for k, d in pairs(higlight_groups) do
     local gui = d.gui or 'NONE'
     api.nvim_command('hi def LuaTree'..k..' gui='..gui..' guifg='..d.fg)
   end
 
-  for k, d in pairs(LINKS) do
+  local links = get_links()
+  for k, d in pairs(links) do
     api.nvim_command('hi def link LuaTree'..k..' '..d)
   end
 end