chore: move help rendering in its own file

Author: kyazdani42

lua/nvim-tree/lib.lua

@@ -107,7 +107,7 @@ function M.get_node_at_cursor()
   local cursor = api.nvim_win_get_cursor(view.get_winnr())
   local line = cursor[1]
   if view.is_help_ui() then
-    local help_lines, _ = renderer.draw_help()
+    local help_lines = require'nvim-tree.renderer.help'.compute_lines()
     local help_text = get_node_at_line(line+1)(help_lines)
     return {name = help_text}
   else

lua/nvim-tree/renderer/help.lua

@@ -0,0 +1,52 @@
+local view = require'nvim-tree.view'
+local M = {}
+
+function M.compute_lines()
+  local help_lines = {'HELP'}
+  local help_hl = {{'NvimTreeRootFolder', 0, 0, #help_lines[1]}}
+  local mappings = vim.tbl_filter(function(v)
+    return v.cb ~= nil and v.cb ~= ""
+  end, view.View.mappings)
+  local processed = {}
+  for _, b in pairs(mappings) do
+    local cb = b.cb
+    local key = b.key
+    local name
+    if cb:sub(1,35) == view.nvim_tree_callback('test'):sub(1,35) then
+      name = cb:match("'[^']+'[^']*$")
+      name = name:match("'[^']+'")
+      table.insert(processed, {key, name, true})
+    else
+      name = (b.name ~= nil) and b.name or cb
+      name = '"' .. name .. '"'
+      table.insert(processed, {key, name, false})
+    end
+  end
+  table.sort(processed, function(a,b)
+    return (a[3] == b[3]
+      and (a[2] < b[2] or (a[2] == b[2] and #a[1] < #b[1])))
+      or (a[3] and not b[3])
+  end)
+
+  local num = 0
+  for _, val in pairs(processed) do
+    local keys = type(val[1]) == "string" and {val[1]} or val[1]
+    local map_name = val[2]
+    local builtin = val[3]
+    for _, key in pairs(keys) do
+      num = num + 1
+      local bind_string = string.format("%6s : %s", key, map_name)
+      table.insert(help_lines, bind_string)
+
+      local hl_len = math.max(6, string.len(key)) + 2
+      table.insert(help_hl, {'NvimTreeFolderName', num, 0, hl_len})
+
+      if not builtin then
+        table.insert(help_hl, {'NvimTreeFileRenamed', num, hl_len, -1})
+      end
+    end
+  end
+  return help_lines, help_hl
+end
+
+return M

lua/nvim-tree/renderer/init.lua

@@ -2,6 +2,7 @@ local config = require'nvim-tree.config'
 local utils = require'nvim-tree.utils'
 local view = require'nvim-tree.view'
 local _padding = require'nvim-tree.renderer.padding'
+local _help = require'nvim-tree.renderer.help'
 
 local api = vim.api
 
@@ -359,54 +360,6 @@ end
 
 local M = {}
 
-function M.draw_help()
-  local help_lines = {'HELP'}
-  local help_hl = {{'NvimTreeRootFolder', 0, 0, #help_lines[1]}}
-  local mappings = vim.tbl_filter(function(v)
-    return v.cb ~= nil and v.cb ~= ""
-  end, view.View.mappings)
-  local processed = {}
-  for _, b in pairs(mappings) do
-    local cb = b.cb
-    local key = b.key
-    local name
-    if cb:sub(1,35) == view.nvim_tree_callback('test'):sub(1,35) then
-      name = cb:match("'[^']+'[^']*$")
-      name = name:match("'[^']+'")
-      table.insert(processed, {key, name, true})
-    else
-      name = (b.name ~= nil) and b.name or cb
-      name = '"' .. name .. '"'
-      table.insert(processed, {key, name, false})
-    end
-  end
-  table.sort(processed, function(a,b)
-    return (a[3] == b[3]
-      and (a[2] < b[2] or (a[2] == b[2] and #a[1] < #b[1])))
-      or (a[3] and not b[3])
-  end)
-
-  local num = 0
-  for _, val in pairs(processed) do
-    local keys = type(val[1]) == "string" and {val[1]} or val[1]
-    local map_name = val[2]
-    local builtin = val[3]
-    for _, key in pairs(keys) do
-      num = num + 1
-      local bind_string = string.format("%6s : %s", key, map_name)
-      table.insert(help_lines, bind_string)
-
-      local hl_len = math.max(6, string.len(key)) + 2
-      table.insert(help_hl, {'NvimTreeFolderName', num, 0, hl_len})
-
-      if not builtin then
-        table.insert(help_hl, {'NvimTreeFileRenamed', num, hl_len, -1})
-      end
-    end
-  end
-  return help_lines, help_hl
-end
-
 function M.draw(tree, reload)
   if not api.nvim_buf_is_loaded(view.View.bufnr) then return end
   local cursor
@@ -425,7 +378,7 @@ function M.draw(tree, reload)
   end
 
   if view.is_help_ui() then
-    lines, hl = M.draw_help()
+    lines, hl = _help.compute_lines()
   end
   api.nvim_buf_set_option(view.View.bufnr, 'modifiable', true)
   api.nvim_buf_set_lines(view.View.bufnr, 0, -1, false, lines)