feat(#2948): document API

lua/nvim-tree/_meta/api_decorator.lua

@@ -3,7 +3,7 @@ error("Cannot require a meta file")
 
 local nvim_tree = { api = { decorator = { BaseDecorator = {} } } }
 
----Create a custom decorator, extending nvim_tree.api.decorator.BaseDecorator
+---Custom decorator extends nvim_tree.api.decorator.BaseDecorator
 ---It may:
 ---  Add icons
 ---  Set name highlight group
@@ -24,15 +24,18 @@ local nvim_tree = { api = { decorator = { BaseDecorator = {} } } }
 ---@alias nvim_tree.api.decorator.Name "Cut" | "Copied" | "Diagnostics" | "Bookmarks" | "Modified" | "Hidden" | "Opened" | "Git" | nvim_tree.api.decorator.BaseDecorator
 
 ---BaseDecorator Class, your decorator will extend this
+---
 ---@class (exact) nvim_tree.api.decorator.BaseDecorator
 ---@field protected enabled boolean
 ---@field protected highlight_range nvim_tree.api.decorator.HighlightRange
 ---@field protected icon_placement nvim_tree.api.decorator.IconPlacement
 
 ---No-args constructor must be implemented
+---
 function nvim_tree.api.decorator.BaseDecorator:new() end
 
 ---Must be called from your constructor
+---
 ---@class (exact) nvim_tree.api.decorator.InitArgs
 ---@field enabled boolean
 ---@field highlight_range nvim_tree.api.decorator.HighlightRange
@@ -43,20 +46,24 @@ function nvim_tree.api.decorator.BaseDecorator:new() end
 function nvim_tree.api.decorator.BaseDecorator:init(args) end
 
 ---Optionally implement this method to set the node's icon
+---
 ---@param node nvim_tree.api.Node
 ---@return HighlightedString? icon_node
 function nvim_tree.api.decorator.BaseDecorator:icon_node(node) end
 
 ---Optionally implement this method to provide icons and the highlight groups for your icon_placement
+---
 ---@param node nvim_tree.api.Node
 ---@return HighlightedString[]? icons
 function nvim_tree.api.decorator.BaseDecorator:icons(node) end
 
 ---Optionally implement this method to provide one highlight group to apply to your highlight_range
+---
 ---@param node nvim_tree.api.Node
 ---@return string? highlight_group
 function nvim_tree.api.decorator.BaseDecorator:highlight_group(node) end
 
+
 --
 -- Example Decorator
 --

lua/nvim-tree/renderer/builder.lua

@@ -49,11 +49,13 @@ function Builder:new(args)
   self.signs           = {}
   self.extmarks        = {}
   self.virtual_lines   = {}
+  self.decorators      = {}
   self.hidden_display  = Builder:setup_hidden_display_function(self.explorer.opts)
 
-  -- lowest priority is registered first
-  self.decorators      = {}
+  ---@type DecoratorArgs
   local decorator_args = { explorer = self.explorer }
+
+  -- lowest priority is registered first
   for _, d in ipairs(decorator_registry.registered) do
     if d:is(DecoratorUser) then
       table.insert(self.decorators, 1, d())

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

@@ -10,12 +10,13 @@ local Decorator = Class:extend()
 
 ---@class (exact) DecoratorArgs
 ---@field explorer Explorer
----
+
+---Abstract constructor
 ---@class (exact) AbstractDecoratorArgs
 ---@field enabled boolean
 ---@field highlight_range DecoratorHighlightRange
 ---@field icon_placement DecoratorIconPlacement
-
+---
 ---@protected
 ---@param args AbstractDecoratorArgs
 function Decorator:new(args)