add view.indent_markers (#1134)

lua/nvim-tree.lua

@@ -336,6 +336,16 @@ local DEFAULT_OPTS = { -- BEGIN_DEFAULT_OPTS
       },
     },
   },
+  renderer = {
+    indent_markers = {
+      enable = false,
+      icons = {
+        corner = "└ ",
+        edge = "│ ",
+        none = "  ",
+      },
+    },
+  },
   hijack_directories = {
     enable = true,
     auto_open = true,
@@ -446,6 +456,7 @@ function M.setup(conf)
   require("nvim-tree.git").setup(opts)
   require("nvim-tree.view").setup(opts)
   require("nvim-tree.lib").setup(opts)
+  require("nvim-tree.renderer").setup(opts)
 
   setup_vim_commands()
   setup_autocommands(opts)

lua/nvim-tree/legacy.lua

@@ -169,6 +169,13 @@ local migrations = {
       o.actions.change_dir.global = vim.g.nvim_tree_change_dir_global == 1
     end
   end,
+
+  nvim_tree_indent_markers = function(o)
+    utils.table_create_missing(o, "renderer.indent_markers")
+    if o.renderer.indent_markers.enable == nil then
+      o.renderer.indent_markers.enable = vim.g.nvim_tree_indent_markers == 1
+    end
+  end,
 }
 
 function M.migrate_legacy_options(opts)

lua/nvim-tree/renderer/init.lua

@@ -256,7 +256,7 @@ function M.draw()
   hl = {}
 
   icon_state = _icons.get_config()
-  local show_arrows = vim.g.nvim_tree_indent_markers ~= 1
+  local show_arrows = not M.config.indent_markers.enable
     and icon_state.show_folder_icon
     and icon_state.show_folder_arrows
   _padding.reload_padding_function()
@@ -289,4 +289,12 @@ function M.render_hl(bufnr)
   end
 end
 
+function M.setup(opts)
+  M.config = {
+    indent_markers = opts.renderer.indent_markers,
+  }
+
+  require("nvim-tree.renderer.padding").setup(opts)
+end
+
 return M

lua/nvim-tree/renderer/padding.lua

@@ -21,11 +21,11 @@ local function get_padding_indent_markers(depth, idx, tree, _, markers)
     markers[rdepth] = idx ~= #tree.nodes
     for i = 1, rdepth do
       if idx == #tree.nodes and i == rdepth then
-        padding = padding .. "└ "
+        padding = padding .. M.config.indent_markers.icons.corner
       elseif markers[i] then
-        padding = padding .. "│ "
+        padding = padding .. M.config.indent_markers.icons.edge
       else
-        padding = padding .. "  "
+        padding = padding .. M.config.indent_markers.icons.none
       end
     end
   end
@@ -39,9 +39,15 @@ function M.reload_padding_function()
     M.get_padding = get_padding_arrows(icon_state)
   end
 
-  if vim.g.nvim_tree_indent_markers == 1 then
+  if M.config.indent_markers.enable then
     M.get_padding = get_padding_indent_markers
   end
 end
 
+function M.setup(opts)
+  M.config = {
+    indent_markers = opts.renderer.indent_markers,
+  }
+end
+
 return M