refactor(#2875): multi instance renderer

Author: alex-courtis

lua/nvim-tree/explorer/init.lua

@@ -51,15 +51,16 @@ function Explorer:new(path)
     return
   end
 
-  ---@type Explorer
-  local o = setmetatable({
+  local o = {
     opts = config,
     absolute_path = path,
     nodes = {},
     open = true,
     sorters = Sorters:new(config),
-  }, Explorer)
-  setmetatable(o, { __index = self })
+  }
+
+  setmetatable(o, self)
+  self.__index = self
 
   o.watcher = watch.create_watcher(o)
   o.renderer = Renderer:new(config, o)

lua/nvim-tree/renderer/builder.lua

@@ -34,6 +34,7 @@ local PICTURE_MAP = {
 ---@field col_end number
 
 ---@class (exact) Builder
+---@field private __index? table
 ---@field lines string[] includes icons etc.
 ---@field hl_args AddHighlightArgs[] line highlights
 ---@field signs string[] line signs
@@ -79,7 +80,8 @@ function Builder:new(opts, explorer)
     hidden_display = Builder:setup_hidden_display_function(opts),
   }
 
-  setmetatable(o, { __index = self })
+  setmetatable(o, self)
+  self.__index = self
 
   return o
 end

lua/nvim-tree/renderer/decorator/init.lua

@@ -2,6 +2,7 @@ local HL_POSITION = require("nvim-tree.enum").HL_POSITION
 local ICON_PLACEMENT = require("nvim-tree.enum").ICON_PLACEMENT
 
 ---@class (exact) Decorator
+---@field private __index? table
 ---@field protected explorer Explorer
 ---@field protected enabled boolean
 ---@field protected hl_pos HL_POSITION
@@ -13,7 +14,8 @@ local Decorator = {}
 function Decorator:new(o)
   o = o or {}
 
-  setmetatable(o, { __index = self })
+  setmetatable(o, self)
+  self.__index = self
 
   return o
 end

lua/nvim-tree/renderer/init.lua

@@ -13,6 +13,7 @@ local namespace_extmarks_id = vim.api.nvim_create_namespace "NvimTreeExtmarks"
 local namespace_virtual_lines_id = vim.api.nvim_create_namespace "NvimTreeVirtualLines"
 
 ---@class (exact) Renderer
+---@field private __index? table
 ---@field private opts table user options
 ---@field private explorer Explorer
 ---@field private builder Builder
@@ -29,7 +30,8 @@ function Renderer:new(opts, explorer)
     builder = Builder:new(opts, explorer),
   }
 
-  setmetatable(o, { __index = self })
+  setmetatable(o, self)
+  self.__index = self
 
   return o
 end