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local api = vim.api
local parsers = require'nvim-treesitter.parsers'
local utils = require'nvim-treesitter.utils'
local M = {}
M.NodeMovementKind = {
up = 'up',
down = 'down',
left = 'left',
right = 'right',
}
M.current_node = {}
local function node_start_to_vim(node)
if not node then return end
local row, col = node:start()
local exec_command = string.format('call cursor(%d, %d)', row+1, col+1)
api.nvim_exec(exec_command, false)
end
M.do_node_movement = function(kind)
local buf, line, col = unpack(vim.fn.getpos("."))
local current_node = M.current_node[buf]
if current_node then
local node_line, node_col = current_node:start()
if line-1 ~= node_line or col-1 ~= node_col then
current_node = nil
end
end
local destination_node
if parsers.has_parser() then
local root = parsers.get_parser():parse():root()
if not current_node then
current_node = root:named_descendant_for_range(line-1, col-1, line-1, col)
end
if kind == M.NodeMovementKind.up then
destination_node = current_node:parent()
elseif kind == M.NodeMovementKind.down then
if current_node:named_child_count() > 0 then
destination_node = current_node:named_child(0)
else
local next_node = utils.get_next_node(current_node)
if next_node and next_node:named_child_count() > 0 then
destination_node = next_node:named_child(0)
end
end
elseif kind == M.NodeMovementKind.left then
destination_node = utils.get_previous_node(current_node, true, true)
elseif kind == M.NodeMovementKind.right then
destination_node = utils.get_next_node(current_node, true, true)
end
M.current_node[buf] = destination_node or current_node
end
if destination_node then
node_start_to_vim(destination_node)
end
end
M.move_up = function() M.do_node_movement(M.NodeMovementKind.up) end
M.move_down = function() M.do_node_movement(M.NodeMovementKind.down) end
M.move_left = function() M.do_node_movement(M.NodeMovementKind.left) end
M.move_right = function() M.do_node_movement(M.NodeMovementKind.right) end
function M.attach(bufnr)
local buf = bufnr or api.nvim_get_current_buf()
local config = require'nvim-treesitter.configs'.get_module('node_movement')
for funcname, mapping in pairs(config.keymaps) do
api.nvim_buf_set_keymap(buf, 'n', mapping,
string.format(":lua require'nvim-treesitter.node_movement'.%s()<CR>", funcname), { silent = true })
end
end
function M.detach(bufnr)
local buf = bufnr or api.nvim_get_current_buf()
local config = require'nvim-treesitter.configs'.get_module('node_movement')
for _, mapping in pairs(config.keymaps) do
api.nvim_buf_del_keymap(buf, 'n', mapping)
end
end
return M
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