refactor(marks): fix offset line and move into init.lua

also set node in marks record instead of true

lua/nvim-tree/marks/init.lua

@@ -0,0 +1,71 @@
+local view = require "nvim-tree.view"
+local Iterator = require "nvim-tree.iterators.node-iterator"
+local core = require "nvim-tree.core"
+
+local NvimTreeMarks = {}
+
+local M = {}
+
+local function add_mark(node)
+  NvimTreeMarks[node.absolute_path] = node
+  M.draw()
+end
+
+local function remove_mark(node)
+  NvimTreeMarks[node.absolute_path] = nil
+  M.draw()
+end
+
+function M.toggle_mark(node)
+  if M.get_mark(node) then
+    remove_mark(node)
+  else
+    add_mark(node)
+  end
+end
+
+function M.get_mark(node)
+  return NvimTreeMarks[node.absolute_path]
+end
+
+function M.get_marks()
+  local list = {}
+  for _, node in pairs(NvimTreeMarks) do
+    table.insert(list, node)
+  end
+  return list
+end
+
+local GROUP = "NvimTreeMarkSigns"
+local SIGN_NAME = "NvimTreeMark"
+
+function M.clear()
+  vim.fn.sign_unplace(GROUP)
+end
+
+function M.draw()
+  if not view.is_visible() then
+    return
+  end
+
+  M.clear()
+
+  local buf = view.get_bufnr()
+  local add = core.get_nodes_starting_line() - 1
+  Iterator.builder(core.get_explorer().nodes)
+    :recursor(function(node)
+      return node.open and node.nodes
+    end)
+    :applier(function(node, idx)
+      if M.get_mark(node) then
+        vim.fn.sign_place(0, GROUP, SIGN_NAME, buf, { lnum = idx + add, priority = 3 })
+      end
+    end)
+    :iterate()
+end
+
+function M.setup(opts)
+  vim.fn.sign_define(SIGN_NAME, { text = opts.renderer.icons.glyphs.bookmark, texthl = "NvimTreeBookmark" })
+end
+
+return M