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fix(treesitter): update folds only once on InsertLeave

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Problem:
With treesitter fold, InsertLeave can be slow, because a single session
of insert mode may schedule multiple fold updates in on_bytes and
on_changedtree.

Solution:
Don't create duplicate autocmds.
This commit is contained in:
Jaehwang Jung 2023-08-24 17:32:43 +09:00 committed by Christian Clason
parent 009c84322d
commit ffb340bf63
1 changed files with 10 additions and 0 deletions
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10
runtime/lua/vim/treesitter/_fold.lua
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@ -235,6 +235,8 @@ local M = {}
---@type table<integer,TS.FoldInfo> ---@type table<integer,TS.FoldInfo>
local foldinfos = {} local foldinfos = {}
local group = api.nvim_create_augroup('treesitter/fold', {})
--- Update the folds in the windows that contain the buffer and use expr foldmethod (assuming that --- Update the folds in the windows that contain the buffer and use expr foldmethod (assuming that
--- the user doesn't use different foldexpr for the same buffer). --- the user doesn't use different foldexpr for the same buffer).
--- ---
@ -253,7 +255,15 @@ local function foldupdate(bufnr)
if api.nvim_get_mode().mode == 'i' then if api.nvim_get_mode().mode == 'i' then
-- foldUpdate() is guarded in insert mode. So update folds on InsertLeave -- foldUpdate() is guarded in insert mode. So update folds on InsertLeave
if #(api.nvim_get_autocmds({
group = group,
buffer = bufnr,
})) > 0 then
return
end
api.nvim_create_autocmd('InsertLeave', { api.nvim_create_autocmd('InsertLeave', {
group = group,
buffer = bufnr,
once = true, once = true,
callback = do_update, callback = do_update,
}) })