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Add compile_regex helper function to avoid re-compiling regexes

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This commit is contained in:
Stephan Seitz 2020-07-05 16:54:53 +02:00
parent 77fc8cd9e7
commit d02de95720
1 changed files with 44 additions and 26 deletions
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70
lua/nvim-treesitter/query.lua
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@ -81,10 +81,24 @@ local function check_magic(str)
return '\\v'..str
end
local function compile_regex(regex)
if not M._regex_cache then
M._regex_cache = {}
end
if not M._regex_cache[regex] then
local re = vim.regex(check_magic(regex))
M._regex_cache[regex] = re
return re
else
return M._regex_cache[regex]
end
end
local function strip_beginning(lines, regex)
local current_col = 0
local current_line = 0
local re = vim.regex(check_magic('^('..regex..')'))
local re = compile_regex('^('..regex..')')
for linenr, line in ipairs(lines) do
current_line = linenr
local match_start, match_end = re:match_str(line)
@ -104,7 +118,7 @@ end
local function strip_end(lines, regex)
local current_col = 0
local line_diff = 0
local re = vim.regex(check_magic('('..regex..')$'))
local re = compile_regex('('..regex..')$')
for linenr=#lines, 1, -1 do
local line = lines[linenr]
line_diff = #lines - linenr
@ -172,37 +186,41 @@ function M.iter_prepared_matches(query, qnode, bufnr, start_row, end_row)
insert_to_path(prepared_match, split(pred[2]), pred[3])
end
if pred[1] == "strip!" and #pred == 3 then
local query_name = query.captures[pred[2]]
local capture_name = query.captures[pred[2]]
local regex = pred[3]
local node = utils.get_at_path(prepared_match, query_name..'.node')
local ts_utils = require 'nvim-treesitter.ts_utils'
local node_lines = ts_utils.get_node_text(node, bufnr)
local start_line, start_col, end_line, end_col = node:range()
local function process_range()
local node = utils.get_at_path(prepared_match, capture_name..'.node')
local ts_utils = require 'nvim-treesitter.ts_utils'
local node_lines = ts_utils.get_node_text(node, bufnr)
local start_line, start_col, end_line, _ = node:range()
local strip_line, strip_col = strip_beginning(node_lines, regex)
start_line = start_line + strip_line
if strip_line == 0 then
start_col = start_col + strip_col
else
start_col =strip_col
end
local strip_line, strip_col = strip_end(node_lines, regex)
end_line = end_line - strip_line
if strip_line == 0 then
end_col = end_col - strip_col
else
end_col = strip_col
end
local strip_line, strip_col = strip_beginning(node_lines, regex)
start_line = start_line + strip_line
if strip_line == 0 then
start_col = start_col + strip_col
else
start_col = strip_col
end
local strip_line, strip_col = strip_end(node_lines, regex)
end_line = end_line - strip_line
local end_col
if strip_line == 0 then
end_col = strip_col
else
end_col = strip_col + (end_line == start_line and start_col or 0)
end
end_line = math.max(end_line, start_line)
if end_line == start_line then
end_col = math.max(end_col, start_col)
end_line = math.max(end_line, start_line)
if end_line == start_line then
end_col = math.max(end_col, start_col)
end
return {start_line, start_col, end_line, end_col}
end
insert_to_path(prepared_match,
split(query_name..'.processed_range'),
{start_line, start_col, end_line, end_col})
split(capture_name..'.process_range'),
process_range)
end
end
end