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local api = vim.api
local configs = require'nvim-treesitter.configs'
local ts_utils = require'nvim-treesitter.ts_utils'
local locals = require'nvim-treesitter.locals'
local parsers = require'nvim-treesitter.parsers'
local M = {}
local selections = {}
function M.init_selection()
local buf = api.nvim_get_current_buf()
local node = ts_utils.get_node_at_cursor()
selections[buf] = { [1] = node }
ts_utils.update_selection(buf, node)
end
--- Get a ts compatible range of the current visual selection.
--
-- The range of ts nodes start with 0 and the ending range is exclusive.
local function visual_selection_range()
local _, csrow, cscol, _ = unpack(vim.fn.getpos("'<"))
local _, cerow, cecol, _ = unpack(vim.fn.getpos("'>"))
if csrow < cerow or (csrow == cerow and cscol <= cecol) then
return csrow - 1, cscol - 1, cerow - 1, cecol
else
return cerow - 1, cecol - 1, csrow - 1, cscol
end
end
local function range_matches(node)
local csrow, cscol, cerow, cecol = visual_selection_range()
local srow, scol, erow, ecol = node:range()
return srow == csrow and scol == cscol and erow == cerow and ecol == cecol
end
local function select_incremental(get_parent)
return function()
local buf = api.nvim_get_current_buf()
local nodes = selections[buf]
local csrow, cscol, cerow, cecol = visual_selection_range()
-- Initialize incremental selection with current selection
if not nodes or #nodes == 0 or not range_matches(nodes[#nodes]) then
local root = parsers.get_parser():parse()[1]:root()
local node = root:named_descendant_for_range(csrow, cscol, cerow, cecol)
ts_utils.update_selection(buf, node)
if nodes and #nodes > 0 then
table.insert(selections[buf], node)
else
selections[buf] = { [1] = node }
end
return
end
-- Find a node that changes the current selection.
local node = nodes[#nodes]
while true do
node = get_parent(node)
if not node then return end
local srow, scol, erow, ecol = node:range()
local same_range = (
srow == csrow
and scol == cscol
and erow == cerow
and ecol == cecol
)
if not same_range then
table.insert(selections[buf], node)
if node ~= nodes[#nodes] then
table.insert(nodes, node)
end
ts_utils.update_selection(buf, node)
return
end
end
end
end
M.node_incremental = select_incremental(function(node)
return node:parent() or node
end)
M.scope_incremental = select_incremental(function(node)
return locals.containing_scope(node:parent() or node)
end)
function M.node_decremental()
local buf = api.nvim_get_current_buf()
local nodes = selections[buf]
if not nodes or #nodes < 2 then return end
table.remove(selections[buf])
local node = nodes[#nodes]
ts_utils.update_selection(buf, node)
end
function M.attach(bufnr)
local config = configs.get_module('incremental_selection')
for funcname, mapping in pairs(config.keymaps) do
local mode
if funcname == "init_selection" then
mode = 'n'
else
mode = 'x'
end
local cmd = string.format(":lua require'nvim-treesitter.incremental_selection'.%s()<CR>", funcname)
api.nvim_buf_set_keymap(bufnr, mode, mapping, cmd, { silent = true, noremap = true })
end
end
function M.detach(bufnr)
local config = configs.get_module('incremental_selection')
for f, mapping in pairs(config.keymaps) do
if f == "init_selection" then
api.nvim_buf_del_keymap(bufnr, 'n', mapping)
else
api.nvim_buf_del_keymap(bufnr, 'x', mapping)
end
end
end
return M
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