Fallback to default icon for symlinks and fix padding

Fixes https://github.com/kyazdani42/nvim-tree.lua/issues/80

README.md

@@ -53,6 +53,7 @@ let g:lua_tree_bindings = {
     \ 'edit_tab':        '<C-t>',
     \ 'toggle_ignored':  'I',
     \ 'toggle_dotfiles': 'H',
+    \ 'refresh':         'R',
     \ 'preview':         '<Tab>',
     \ 'cd':              '<C-]>',
     \ 'create':          'a',
@@ -73,6 +74,7 @@ let g:lua_tree_bindings = {
 " default shows no icon by default
 let g:lua_tree_icons = {
     \ 'default': '',
+    \ 'symlink': '',
     \ 'git': {
     \   'unstaged': "✗",
     \   'staged': "✓",
@@ -119,6 +121,7 @@ highlight LuaTreeFolderIcon guibg=blue
 - `<Tab>` will open the file as a preview (keeps the cursor in the tree)
 - `I` will toggle visibility of folders hidden via |g:lua_tree_ignore|
 - `H` will toggle visibility of dotfiles (files/folders starting with a `.`)
+- `R` will refresh the tree
 - `gx` opens the file with the `open` command on MACOS and `xdg-open` in linux
 - Double left click acts like `<CR>`
 - Double right click acts like `<C-]>`
@@ -127,7 +130,7 @@ highlight LuaTreeFolderIcon guibg=blue
 
 This plugin is very fast because it uses the `libuv` `scandir` and `scandir_next` functions instead of spawning an `ls` process which can get slow on large files when combining with `stat` to get file informations.
 
-The Netrw vim plugin is disabled, hence features like `gx` don't work accross your windows/buffers. You could use a plugin like [this one](https://github.com/stsewd/gx-extended.vim) if you wish to use that feature.
+The Netrw vim plugin is disabled, hence features like `gx` don't work across your windows/buffers. You could use a plugin like [this one](https://github.com/stsewd/gx-extended.vim) if you wish to use that feature.
 
 ## Features
 - Open file in current buffer or in split with FzF like bindings (`<CR>`, `<C-v>`, `<C-x>`, `<C-t>`)

doc/nvim-tree-lua.txt

@@ -87,11 +87,16 @@ is installed and in your |runtimepath|
 
 |g:lua_tree_icons|                                *g:lua_tree_icons*
 
-You can set some icons for the git status and the default icon that shows
-when no icon is found for a file.
+You can set icons for:
+
+- The git status.
+- The default icon that shows when no icon is found for a file
+  or if you are not using icons.
+- Symlinks. If an icon is not provided, the `default` icon is used.
 >
   let g:lua_tree_icons = {
       \ 'default': '',
+      \ 'symlink': '',
       \ 'git': {
       \   'unstaged': "✗",
       \   'staged': "✓",

lua/lib/config.lua

@@ -4,6 +4,7 @@ function M.get_icon_state()
   local show_icons = vim.g.lua_tree_show_icons or { git = 1, folders = 1, files = 1 }
   local icons = {
     default = "",
+    symlink = "",
     git_icons = {
       unstaged = "✗",
       staged = "✓",
@@ -21,6 +22,10 @@ function M.get_icon_state()
   if user_icons then
     if user_icons.default then
       icons.default = user_icons.default
+      icons.symlink = user_icons.default
+    end
+    if user_icons.symlink then
+      icons.symlink = user_icons.symlink
     end
     for key, val in pairs(user_icons.git or {}) do
       if icons.git_icons[key] then

lua/lib/renderer.lua

@@ -48,6 +48,20 @@ if icon_state.show_file_icon then
 
 end
 
+local get_symlink_icon = function() return icon_state.icons.symlink end
+if icon_state.show_file_icon then
+  get_symlink_icon = function()
+    return #icon_state.icons.symlink > 0 and icon_state.icons.symlink.." " or ""
+  end
+end
+
+local get_special_icon = function() return icon_state.icons.default end
+if icon_state.show_file_icon then
+  get_special_icon = function()
+    return icon_state.icons.default.." "
+  end
+end
+
 local get_git_icons = function() return "" end
 local get_git_hl = function() return end
 
@@ -195,17 +209,17 @@ local function update_draw_data(tree, depth, markers)
         table.insert(lines, padding..icon..git_icon..node.name)
       end
     elseif node.link_to then
+      local icon = get_symlink_icon()
       local link_hl = git_hl or 'LuaTreeSymlink'
       table.insert(hl, { link_hl, index, offset, -1 })
-      table.insert(lines, padding..node.name.." ➛ "..node.link_to)
+      table.insert(lines, padding..icon..node.name.." ➛ "..node.link_to)
       index = index + 1
 
     else
       local icon
       local git_icons
       if special[node.name] then
-        icon = icon_state.icons.default
-        if icon ~= "" then icon = icon.." " end
+        icon = get_special_icon()
         git_icons = get_git_icons(node, index, offset, 0)
         table.insert(hl, {'LuaTreeSpecialFile', index, offset+#git_icons, -1})
       else