feat(#2948): add UserDecorator

lua/nvim-tree/renderer/builder.lua

@@ -214,7 +214,7 @@ function Builder:add_highlights(node)
   local d, icon, name
   for i = #self.decorators, 1, -1 do
     d = self.decorators[i]
-    icon, name = d:groups_icon_name(node)
+    icon, name = d:highlight_group_icon_name(node)
     table.insert(icon_groups, icon)
     table.insert(name_groups, name)
   end

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

@@ -34,7 +34,7 @@ end
 ---Bookmark icon: renderer.icons.show.bookmarks and node is marked
 ---@param node Node
 ---@return HighlightedString[]|nil icons
-function DecoratorBookmarks:calculate_icons(node)
+function DecoratorBookmarks:icons(node)
   if self.explorer.marks:get(node) then
     return { self.icon }
   end
@@ -43,7 +43,7 @@ end
 ---Bookmark highlight: renderer.highlight_bookmarks and node is marked
 ---@param node Node
 ---@return string|nil group
-function DecoratorBookmarks:calculate_highlight(node)
+function DecoratorBookmarks:highlight_group(node)
   if self.highlight_range ~= "none" and self.explorer.marks:get(node) then
     return "NvimTreeBookmarkHL"
   end

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

@@ -25,7 +25,7 @@ end
 ---Copied highlight: renderer.highlight_clipboard and node is copied
 ---@param node Node
 ---@return string|nil group
-function DecoratorCopied:calculate_highlight(node)
+function DecoratorCopied:highlight_group(node)
   if self.highlight_range ~= "none" and self.explorer.clipboard:is_copied(node) then
     return "NvimTreeCopiedHL"
   end

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

@@ -25,7 +25,7 @@ end
 ---Cut highlight: renderer.highlight_clipboard and node is cut
 ---@param node Node
 ---@return string|nil group
-function DecoratorCut:calculate_highlight(node)
+function DecoratorCut:highlight_group(node)
   if self.highlight_range ~= "none" and self.explorer.clipboard:is_cut(node) then
     return "NvimTreeCutHL"
   end

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

@@ -32,7 +32,7 @@ local ICON_KEYS = {
 
 ---@class (exact) DecoratorDiagnostics: Decorator
 ---@field private explorer Explorer
----@field private icons HighlightedString[]?
+---@field private diag_icons HighlightedString[]?
 local DecoratorDiagnostics = Decorator:extend()
 
 ---@class DecoratorDiagnostics
@@ -57,13 +57,13 @@ function DecoratorDiagnostics:new(explorer)
   end
 
   if self.explorer.opts.renderer.icons.show.diagnostics then
-    self.icons = {}
+    self.diag_icons = {}
     for name, sev in pairs(ICON_KEYS) do
-      self.icons[sev] = {
+      self.diag_icons[sev] = {
         str = self.explorer.opts.diagnostics.icons[name],
         hl = { HG_ICON[sev] },
       }
-      self:define_sign(self.icons[sev])
+      self:define_sign(self.diag_icons[sev])
     end
   end
 end
@@ -71,13 +71,13 @@ end
 ---Diagnostic icon: diagnostics.enable, renderer.icons.show.diagnostics and node has status
 ---@param node Node
 ---@return HighlightedString[]|nil icons
-function DecoratorDiagnostics:calculate_icons(node)
-  if node and self.enabled and self.icons then
+function DecoratorDiagnostics:icons(node)
+  if node and self.enabled and self.diag_icons then
     local diag_status = diagnostics.get_diag_status(node)
     local diag_value = diag_status and diag_status.value
 
     if diag_value then
-      return { self.icons[diag_value] }
+      return { self.diag_icons[diag_value] }
     end
   end
 end
@@ -85,7 +85,7 @@ end
 ---Diagnostic highlight: diagnostics.enable, renderer.highlight_diagnostics and node has status
 ---@param node Node
 ---@return string|nil group
-function DecoratorDiagnostics:calculate_highlight(node)
+function DecoratorDiagnostics:highlight_group(node)
   if not node or not self.enabled or self.highlight_range == "none" then
     return nil
   end

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

@@ -148,7 +148,7 @@ end
 ---Git icons: git.enable, renderer.icons.show.git and node has status
 ---@param node Node
 ---@return HighlightedString[]|nil modified icon
-function DecoratorGit:calculate_icons(node)
+function DecoratorGit:icons(node)
   if not node or not self.enabled or not self.icons_by_xy then
     return nil
   end
@@ -200,7 +200,7 @@ function DecoratorGit:sign_name(node)
     return
   end
 
-  local icons = self:calculate_icons(node)
+  local icons = self:icons(node)
   if icons and #icons > 0 then
     return icons[1].hl[1]
   end
@@ -209,7 +209,7 @@ end
 ---Git highlight: git.enable, renderer.highlight_git and node has status
 ---@param node Node
 ---@return string|nil group
-function DecoratorGit:calculate_highlight(node)
+function DecoratorGit:highlight_group(node)
   if not node or not self.enabled or self.highlight_range == "none" then
     return nil
   end

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

@@ -35,7 +35,7 @@ end
 ---Hidden icon: renderer.icons.show.hidden and node starts with `.` (dotfile).
 ---@param node Node
 ---@return HighlightedString[]|nil icons
-function DecoratorHidden:calculate_icons(node)
+function DecoratorHidden:icons(node)
   if self.enabled and node:is_dotfile() then
     return { self.icon }
   end
@@ -44,7 +44,7 @@ end
 ---Hidden highlight: renderer.highlight_hidden and node starts with `.` (dotfile).
 ---@param node Node
 ---@return string|nil group
-function DecoratorHidden:calculate_highlight(node)
+function DecoratorHidden:highlight_group(node)
   if not self.enabled or self.highlight_range == "none" or not node:is_dotfile() then
     return nil
   end

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

@@ -19,15 +19,15 @@ function Decorator:new(args)
   end
 end
 
----Maybe highlight groups
+---Maybe highlight groups for icon and name
 ---@param node Node
 ---@return string? icon highlight group
 ---@return string? name highlight group
-function Decorator:groups_icon_name(node)
+function Decorator:highlight_group_icon_name(node)
   local icon_hl, name_hl
 
   if self.enabled and self.highlight_range ~= "none" then
-    local hl = self:calculate_highlight(node)
+    local hl = self:highlight_group(node)
 
     if self.highlight_range == "all" or self.highlight_range == "icon" then
       icon_hl = hl
@@ -48,7 +48,7 @@ function Decorator:sign_name(node)
     return
   end
 
-  local icons = self:calculate_icons(node)
+  local icons = self:icons(node)
   if icons and #icons > 0 then
     return icons[1].hl[1]
   end
@@ -62,7 +62,7 @@ function Decorator:icons_before(node)
     return
   end
 
-  return self:calculate_icons(node)
+  return self:icons(node)
 end
 
 ---Icons when "after"
@@ -73,7 +73,7 @@ function Decorator:icons_after(node)
     return
   end
 
-  return self:calculate_icons(node)
+  return self:icons(node)
 end
 
 ---Icons when "right_align"
@@ -84,14 +84,14 @@ function Decorator:icons_right_align(node)
     return
   end
 
-  return self:calculate_icons(node)
+  return self:icons(node)
 end
 
 ---Maybe icons, optionally implemented
 ---@protected
 ---@param node Node
 ---@return HighlightedString[]? icons
-function Decorator:calculate_icons(node)
+function Decorator:icons(node)
   self:nop(node)
 end
 
@@ -99,7 +99,7 @@ end
 ---@protected
 ---@param node Node
 ---@return string? group
-function Decorator:calculate_highlight(node)
+function Decorator:highlight_group(node)
   self:nop(node)
 end
 

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

@@ -41,7 +41,7 @@ end
 ---Modified icon: modified.enable, renderer.icons.show.modified and node is modified
 ---@param node Node
 ---@return HighlightedString[]|nil icons
-function DecoratorModified:calculate_icons(node)
+function DecoratorModified:icons(node)
   if self.enabled and buffers.is_modified(node) then
     return { self.icon }
   end
@@ -50,7 +50,7 @@ end
 ---Modified highlight: modified.enable, renderer.highlight_modified and node is modified
 ---@param node Node
 ---@return string|nil group
-function DecoratorModified:calculate_highlight(node)
+function DecoratorModified:highlight_group(node)
   if not self.enabled or self.highlight_range == "none" or not buffers.is_modified(node) then
     return nil
   end

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

@@ -28,7 +28,7 @@ end
 ---Opened highlight: renderer.highlight_opened_files and node has an open buffer
 ---@param node Node
 ---@return string|nil group
-function DecoratorOpened:calculate_highlight(node)
+function DecoratorOpened:highlight_group(node)
   if self.highlight_range ~= "none" and buffers.is_opened(node) then
     return "NvimTreeOpenedHL"
   end

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

@@ -1,10 +1,13 @@
 local Decorator = require("nvim-tree.renderer.decorator")
 
----Abstract user decorator, extend to define your own.
----Icon and highlight are optional.
----Mandatory constructor will be called once per tree render, with no arguments:
----  Must call super passing DecoratorArgs: MyDecorator.super.new(self, args)
----  Must call define_sign, when using "signcolumn"
+---Define a Decorator to optionally set:
+---  Additional icons
+---  Highlight group
+---  Node icon
+---Mandator constructor  MyDecorator:new()  will be called once per tree render, with no arguments.
+---Must call:
+---  super passing DecoratorArgs  MyDecorator.super.new(self, args)
+---  define_sign when using "signcolumn"
 ---See example at end.
 
 ---@class (exact) UserDecorator: Decorator
@@ -13,14 +16,14 @@ local UserDecorator = Decorator:extend()
 ---Override this method to provide icons and the highlight groups to apply to DecoratorIconPlacement
 ---@param node Node
 ---@return HighlightedString[]? icons
-function UserDecorator:calculate_icons(node)
+function UserDecorator:icons(node)
   self:nop(node)
 end
 
 ---Override this method to provide one highlight group to apply to DecoratorRange
 ---@param node Node
 ---@return string? group
-function UserDecorator:calculate_highlight(node)
+function UserDecorator:highlight_group(node)
   self:nop(node)
 end
 
@@ -60,7 +63,7 @@ end
 ---Just one icon for DecoratorIconPlacement
 ---@param node Node
 ---@return HighlightedString[]|nil icons
-function MyDecorator:calculate_icons(node)
+function MyDecorator:icons(node)
   if node.name == "example" then
     return { self.my_icon }
   else
@@ -71,7 +74,7 @@ end
 ---Exactly one highlight group for DecoratorHighlightRange
 ---@param node Node
 ---@return string|nil group
-function MyDecorator:calculate_highlight(node)
+function MyDecorator:highlight_group(node)
   if node.name == "example" then
     return "ExampleHighlight"
   else