refactor(actions): split movements into multiple modules

lua/nvim-tree/actions/moves/sibling.lua

@@ -0,0 +1,53 @@
+local utils = require "nvim-tree.utils"
+local view = require "nvim-tree.view"
+local core = require "nvim-tree.core"
+local lib = require "nvim-tree.lib"
+
+local M = {}
+
+local function get_index_of(node, nodes)
+  local node_path = node.absolute_path
+  local line = 1
+
+  for _, _node in ipairs(nodes) do
+    if not _node.hidden then
+      local n = lib.get_last_group_node(_node)
+      if node_path == n.absolute_path then
+        return line
+      end
+
+      line = line + 1
+    end
+  end
+end
+
+function M.fn(direction)
+  return function(node)
+    if node.name == ".." or not direction then
+      return
+    end
+
+    local parent = node.parent or core.get_explorer()
+    local parent_nodes = vim.tbl_filter(function(n)
+      return not n.hidden
+    end, parent.nodes)
+
+    local node_index = get_index_of(node, parent_nodes)
+
+    local target_idx = node_index + direction
+    if target_idx < 1 then
+      target_idx = 1
+    elseif target_idx > #parent_nodes then
+      target_idx = #parent_nodes
+    end
+
+    local target_node = parent_nodes[target_idx]
+    local _, line = utils.find_node(core.get_explorer().nodes, function(n)
+      return n.absolute_path == target_node.absolute_path
+    end)
+
+    view.set_cursor { line + 1, 0 }
+  end
+end
+
+return M