feat: file nesting

README.md

@@ -78,14 +78,20 @@ use {
           indent = {
             indent_size = 2,
             padding = 1, -- extra padding on left hand side
+            -- indent guides
             with_markers = true,
             indent_marker = "│",
             last_indent_marker = "└",
             highlight = "NeoTreeIndentMarker",
+            -- expander config, needed for nesting files
+            with_expanders = nil, -- if nil and file nesting is enabled, will enable expanders
+            expander_collapsed = "",
+            expander_expanded = "",
+            expander_highlight = "NeoTreeExpander",
           },
           icon = {
-            folder_closed = "",
-            folder_open = "",
+            folder_closed = "",
+            folder_open = "",
             folder_empty = "ﰊ",
             default = "*",
           },
@@ -136,6 +142,7 @@ use {
             ["q"] = "close_window",
           }
         },
+        nesting_rules = {},
         filesystem = {
           filtered_items = {
             visible = false, -- when true, they will just be displayed differently than normal items
@@ -325,6 +332,10 @@ automatically change the directory without prompting. This option implies
 
 See `:h neo-tree-commands` for details and a full listing of available arguments.
 
+### File Nesting
+
+See `:h neo-tree-file-nesting` for mmore details about file nesting
+
 
 ### Netrw Hijack
 

doc/neo-tree.txt

@@ -16,6 +16,8 @@ Configuration ............... |neo-tree-configuration|
   Git Status ................ |neo-tree-git-status|
   Diagnostics ............... |neo-tree-diagnostics|
   Indent markers ............ |neo-tree-indent-markers|
+  Expanders ................. |neo-tree-expanders|
+  File nesting .............. |neo-tree-file-nesting|
   Highlights ................ |neo-tree-highlights|
   Events .................... |neo-tree-events|
   Components and Renderers .. |neo-tree-renderers|
@@ -612,6 +614,41 @@ To change highlight of indent markers, you need configure `NeoTreeIndentMarker`
 highlight group. By default, it refers to `Normal` highlight.
 
 
+EXPANDERS                                                   *neo-tree-expanders*
+Is hightly recommended enable if file nesting is enabled (this is the default
+behavior if `with_expanders` is nil). The config can be done inside the `indent`
+component:
+>
+    require("neo-tree").setup({
+        default_component_configs = {
+            indent = {
+                with_expanders = true,
+                expander_collapsed = "",
+                expander_expanded = "",
+                expander_highlight = "NeoTreeExpander",
+            },
+        },
+    })
+<
+
+FILE NESTING                                             *neo-tree-file-nesting*
+
+By default, file nesting is disabled since `nesting_rules` table is empty,
+there is not files to apply the nesting, this can be enabled filling the
+`nesting_rules` table with the following structure:
+>
+    require("neo-tree").setup({
+        nesting_rules = {
+            ["js"] = { "js.map" }
+        }
+    })
+<
+This will render:
+>
+    FILENAME.js
+        FILENAME.js.map
+<
+
 HIGHLIGHTS                                                 *neo-tree-highlights*
 
 The following highlight groups are defined by this plugin. If you set any of
@@ -643,6 +680,7 @@ NeoTreeGitUntracked       File name when the git status is untracked.
 NeoTreeHiddenByName       Used for icons and names when `hide_by_name` is used.
 NeoTreeIndentMarker       The style of indentation markers (guides). By default,
                           the "Normal" highlight is used.
+NeoTreeExpander           Used for collapsed/expanded icons.
 NeoTreeNormal             |hl-Normal| override in Neo-tree window.
 NeoTreeNormalNC           |hi-NormalNC| override in Neo-tree window.
 NeoTreeRootName           The name of the root node.

lua/neo-tree/defaults.lua

@@ -54,14 +54,21 @@ local config = {
     indent = {
       indent_size = 2,
       padding = 1,
-      with_markers = false,
+      -- indent guides
+      with_markers = true,
       indent_marker = "│",
       last_indent_marker = "└",
       highlight = "NeoTreeIndentMarker",
+      -- expander config, needed for nesting files
+      with_expanders = nil, -- if nil and file nesting is enabled, will enable expanders
+      expander_collapsed = "",
+      expander_expanded = "",
+      expander_highlight = "NeoTreeExpander",
     },
     icon = {
-      folder_closed = "",
-      folder_open = "",
+      folder_closed = "",
+      folder_open = "",
+      folder_empty = "ﰊ",
       default = "*",
     },
     name = {
@@ -151,6 +158,7 @@ local config = {
       { "git_status" },
     },
   },
+  nesting_rules = {},
   filesystem = {
     window = {
       mappings = {

lua/neo-tree/setup/init.lua

@@ -3,6 +3,7 @@ local defaults = require("neo-tree.defaults")
 local mapping_helper = require("neo-tree.setup.mapping-helper")
 local events = require("neo-tree.events")
 local log = require("neo-tree.log")
+local file_nesting = require("neo-tree.sources.common.file-nesting")
 local highlights = require("neo-tree.ui.highlights")
 local manager = require("neo-tree.sources.manager")
 local netrw   = require("neo-tree.setup.netrw")
@@ -193,7 +194,6 @@ M.win_enter_event = function()
   end
 end
 
-
 M.set_log_level = function(level)
   log.set_level(level)
 end
@@ -243,8 +243,10 @@ M.merge_config = function(config, is_auto_config)
   local migrations = require("neo-tree.setup.deprecations").migrate(config)
   if #migrations > 0 then
     -- defer to make sure it is the last message printed
-    vim.defer_fn(function ()
-      vim.cmd("echohl WarningMsg | echo 'Some options have changed, please run `:Neotree migrations` to see the changes' | echohl NONE")
+    vim.defer_fn(function()
+      vim.cmd(
+        "echohl WarningMsg | echo 'Some options have changed, please run `:Neotree migrations` to see the changes' | echohl NONE"
+      )
     end, 50)
   end
 
@@ -289,13 +291,14 @@ M.merge_config = function(config, is_auto_config)
       "force",
       default_config.window or {},
       source_config.window or {},
-      config.window or {})
+      config.window or {}
+    )
     source_config.renderers = source_config.renderers or {}
     -- if source does not specify a renderer, use the global default
     for name, renderer in pairs(default_config.renderers or {}) do
       if source_config.renderers[name] == nil then
         local r = {}
-        for  _, value in ipairs(renderer) do
+        for _, value in ipairs(renderer) do
           if value[1] and source_config.components[value[1]] ~= nil then
             table.insert(r, value)
           end
@@ -331,6 +334,8 @@ M.merge_config = function(config, is_auto_config)
   -- apply the users config
   M.config = vim.tbl_deep_extend("force", default_config, config)
 
+  file_nesting.setup(M.config.nesting_rules)
+
   for _, source_name in ipairs(sources) do
     for name, rndr in pairs(M.config[source_name].renderers) do
       M.config[source_name].renderers[name] = merge_global_components_config(rndr, M.config)

lua/neo-tree/sources/common/commands.lua

@@ -6,23 +6,31 @@ local utils = require("neo-tree.utils")
 local renderer = require("neo-tree.ui.renderer")
 local log = require("neo-tree.log")
 
+---Gets the node parent folder recursively
+---@param tree tree to look for nodes
+---@param node node to look for folder parent
+---@return node
+local function get_folder_node(tree, node)
+  if node.type == "directory" then
+    return node
+  end
+  return get_folder_node(tree, tree:get_node(node:get_parent_id()))
+end
+
 local M = {}
 
 ---Add a new file or dir at the current node
 ---@param state table The state of the source
 ---@param callback function The callback to call when the command is done. Called with the parent node as the argument.
 M.add = function(state, callback)
   local tree = state.tree
-  local node = tree:get_node()
-  if node.type == "file" then
-    node = tree:get_node(node:get_parent_id())
-  end
+  local node = get_folder_node(tree, tree:get_node())
+
   fs_actions.create_node(node:get_id(), callback)
 end
 
 M.close_all_nodes = function(state)
   renderer.collapse_all_nodes(state.tree)
-  state.tree:get_nodes()[1]:expand()
   state.tree:render()
 end
 
@@ -32,13 +40,13 @@ M.close_node = function(state, callback)
   local parent_node = tree:get_node(node:get_parent_id())
   local target_node
 
-  if node.type == "directory" and node:is_expanded() then
+  if node:has_children() and node:is_expanded() then
     target_node = node
   else
     target_node = parent_node
   end
 
-  if target_node then
+  if target_node and target_node:has_children() then
     target_node:collapse()
     tree:render()
     renderer.focus_node(state, target_node:get_id())
@@ -90,12 +98,7 @@ end
 ---@param callback function The callback to call when the command is done. Called with the parent node as the argument.
 M.paste_from_clipboard = function(state, callback)
   if state.clipboard then
-    local at_node = state.tree:get_node()
-    local folder = at_node:get_id()
-    if at_node.type == "file" then
-      folder = at_node:get_parent_id()
-    end
-
+    local folder = get_folder_node(state.tree, state.tree:get_node()):get_id()
     -- Convert to list so to make it easier to pop items from the stack.
     local clipboard_list = {}
     for _, item in pairs(state.clipboard) do
@@ -177,10 +180,20 @@ local open_with_cmd = function(state, open_cmd, toggle_directory)
     log.debug("Could not get node.")
     return
   end
-  if node.type == "directory" then
-    if toggle_directory then
+
+  local function open()
+    local path = node:get_id()
+    utils.open_file(state, path, open_cmd)
+  end
+
+  if utils.is_expandable(node) then
+    if toggle_directory and node.type == "directory" then
       toggle_directory(node)
     elseif node:has_children() then
+      if node:is_expanded() and node.type == "file" then
+        return open()
+      end
+
       local updated = false
       if node:is_expanded() then
         updated = node:collapse()
@@ -191,10 +204,8 @@ local open_with_cmd = function(state, open_cmd, toggle_directory)
         tree:render()
       end
     end
-    return nil
   else
-    local path = node:get_id()
-    utils.open_file(state, path, open_cmd)
+    open()
   end
 end
 
@@ -248,8 +259,6 @@ M.toggle_directory = function(state)
     end
     if updated then
       tree:render()
-    else
-      tree:render()
     end
   end
 end