Fallback to default icon for symlinks and fix padding

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

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 = "✓",
@@ -22,6 +23,10 @@ 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

@@ -49,6 +49,20 @@ 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
 
@@ -210,17 +224,17 @@ 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