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local M = {}
local TSRange = {}
TSRange.__index = TSRange
local api = vim.api
local parsers = require'nvim-treesitter.parsers'
local function get_byte_offset(buf, row, col)
return api.nvim_buf_get_offset(buf, row)
+ vim.fn.byteidx(api.nvim_buf_get_lines(buf, row, row + 1, false), col)
end
function TSRange.new(buf, start_row, start_col, end_row, end_col)
return setmetatable(
{
start_pos = {start_row, start_col, get_byte_offset(buf, start_row, start_col)},
end_pos = {end_row, end_col, get_byte_offset(buf, end_row, end_col)},
buf = buf,
[1] = start_row,
[2] = start_col,
[3] = end_row,
[4] = end_col,
},
TSRange)
end
function TSRange.from_nodes(buf, start_node, end_node)
TSRange.__index = TSRange
local start_pos = {start_node:start()}
local end_pos = {end_node:end_()}
return setmetatable(
{
start_pos = {start_pos[1], start_pos[2], start_pos[3]},
end_pos = {end_pos[1], end_pos[2], end_pos[3]},
buf = buf,
[1] = start_pos[1],
[2] = start_pos[2],
[3] = end_pos[1],
[4] = end_pos[2],
},
TSRange)
end
function TSRange.from_table(buf, range)
return setmetatable(
{
start_pos = {range[1], range[2], get_byte_offset(buf, range[1], range[2])},
end_pos = {range[3], range[4], get_byte_offset(buf, range[3], range[4])},
buf = buf,
[1] = range[1],
[2] = range[2],
[3] = range[3],
[4] = range[4],
},
TSRange)
end
function TSRange:parent(range)
local parser = parsers.get_parser(self.buf, parsers.get_buf_lang(range))
local root = parser.tree:root()
return root:named_descendant_for_range(self.start_pos[1], self.start_pos[2], self.end_pos[1], self.end_pos[2])
end
function TSRange:field()
end
function TSRange:child_count()
return #self:collect_children()
end
function TSRange:named_child_count()
return #self:collect_children(function(c) return c:named() end)
end
function TSRange:iter_children()
local raw_iterator = self:parent().iter_children()
return function()
while true do
local node = raw_iterator()
if not node then return end
local _, _, start_byte = node:start()
local _, _, end_byte = node:end_()
if start_byte >= self.start_pos[3] and end_byte <= self.end_pos[3] then
return node
end
end
end
end
function TSRange:collect_children(filter_fun)
local children = {}
for _, c in self:iter_children() do
if not filter_fun or filter_fun(c) then
table.insert(children, c)
end
end
return children
end
function TSRange:child(index)
return self:collect_children()[index + 1]
end
function TSRange:named_child(index)
return self:collect_children(function(c) return c.named() end)[index + 1]
end
function TSRange:start()
return unpack(self.start_pos)
end
function TSRange:end_()
return unpack(self.end_pos)
end
function TSRange:range()
return self.start_pos[1], self.start_pos[2], self.end_pos[1], self.end_pos[2]
end
function TSRange:type()
return 'nvim-treesitter-range'
end
function TSRange:symbol()
return -1
end
function TSRange:named()
return false
end
function TSRange:missing()
return false
end
function TSRange:has_error()
return #self:collect_children(function(c) return c:has_error() end) > 0 and true or false
end
function TSRange:sexpr()
return table.concat(vim.tbl_map(function(c) return c:sexpr() end, self:collect_children()), ' ')
end
M.TSRange = TSRange
return M
|
