codemp-nvim/lua/codemp/buffers.lua

188 lines
6.8 KiB
Lua

local utils = require('codemp.utils')
local session = require('codemp.session')
---@type table<integer, string>
local id_buffer_map = {}
---@type table<string, integer>
local buffer_id_map = {}
---@type table<string, string>
local user_buffer_name = {}
local ticks = {}
---@param name string name of buffer to attach to
---@param buffer integer buffer to use for attaching (will clear content)
---@param content? string if provided, set this content after attaching
---@param nowait? boolean skip waiting for initial content sync
---@return BufferController
local function attach(name, buffer, content, nowait)
if buffer_id_map[name] ~= nil then
error("already attached to buffer " .. name)
end
vim.api.nvim_set_option_value('fileformat', 'unix', { buf = buffer })
vim.api.nvim_buf_set_name(buffer, name)
local controller = session.workspace:attach_buffer(name):await()
if not nowait then
local promise = controller:poll()
for i=1, 20, 1 do
if promise.ready then break end
vim.uv.sleep(100)
end
end
-- TODO map name to uuid
id_buffer_map[buffer] = name
buffer_id_map[name] = buffer
ticks[buffer] = 0
-- hook serverbound callbacks
-- TODO breaks when deleting whole lines at buffer end
vim.api.nvim_buf_attach(buffer, false, {
on_bytes = function(_, buf, tick, start_row, start_col, start_offset, old_end_row, old_end_col, old_end_byte_len, new_end_row, new_end_col, new_byte_len)
if tick <= ticks[buf] then return end
if id_buffer_map[buf] == nil then return true end -- unregister callback handler
if CODEMP.config.debug then print(string.format(
"start(row:%s, col:%s) offset:%s end(row:%s, col:%s new(row:%s, col:%s)) len(old:%s, new:%s)",
start_row, start_col, start_offset, old_end_row, old_end_col, new_end_row, new_end_col, old_end_byte_len, new_byte_len
)) end
local end_offset = start_offset + old_end_byte_len
local change_content = ""
local len = utils.buffer.len(buf)
if start_offset + new_byte_len + 1 > len then
-- i dont know why but we may go out of bounds when doing 'dd' at the end of buffer??
local delta = (start_offset + new_byte_len + 1) - len
if CODEMP.config.debug then print("/!\\ bytes out of bounds by " .. delta .. ", adjusting") end
end_offset = end_offset - delta
start_offset = start_offset - delta
end
if new_byte_len > 0 then
local actual_end_col = new_end_col
if new_end_row == 0 then actual_end_col = new_end_col + start_col end
local actual_end_row = start_row + new_end_row
-- -- when bulk inserting at the end we go out of bounds, so we probably need to clamp?
-- -- issue: row=x+1 col=0 and row=x col=0 may be very far apart! we need to get last col of row x, ughh..
-- -- also, this doesn't work so it will stay commented out for a while longer
-- if new_end_row ~= old_end_row and new_end_col == 0 then
-- -- we may be dealing with the last line of the buffer, get_text could error because out-of-bounds
-- local row_count = vim.api.nvim_buf_line_count(buf)
-- if actual_end_row + 1 > row_count then
-- local delta = (actual_end_row + 1) - row_count
-- if CODEMP.config.debug then print("/!\\ row out of bounds by " .. delta .. ", adjusting") end
-- actual_end_row = actual_end_row - delta
-- actual_end_col = len - vim.api.nvim_buf_get_offset(buf, row_count)
-- end
-- end
local lines = vim.api.nvim_buf_get_text(buf, start_row, start_col, actual_end_row, actual_end_col, {})
change_content = table.concat(lines, '\n')
end
if CODEMP.config.debug then
print(string.format("sending: %s..%s '%s'", start_offset, start_offset + old_end_byte_len, change_content))
end
controller:send(start_offset, end_offset, change_content):await()
end,
})
local async = vim.loop.new_async(vim.schedule_wrap(function ()
while true do
local event = controller:try_recv():await()
if event == nil then break end
ticks[buffer] = vim.api.nvim_buf_get_changedtick(buffer)
if CODEMP.config.debug then
print(" ~~ applying change ~~ " .. event.first .. ".." .. event.last .. "::[" .. event.content .. "]")
end
utils.buffer.set_content(buffer, event.content, event.first, event.last)
if event.hash ~= nil then
if utils.hash(utils.buffer.get_content(buffer)) ~= event.hash then
-- OUT OF SYNC!
-- TODO this may be destructive! we should probably prompt the user before doing this
print(" /!\\ out of sync, resynching...")
utils.buffer.set_content(buffer, controller:content():await())
return
end
end
end
end))
local remote_content = controller:content():await()
if content ~= nil then
-- TODO this may happen too soon!!
local _ = controller:send(0, #remote_content, content) -- no need to await
else
local current_content = utils.buffer.get_content(buffer)
if current_content ~= remote_content then
ticks[buffer] = vim.api.nvim_buf_get_changedtick(buffer)
utils.buffer.set_content(buffer, remote_content)
end
end
controller:callback(function (_controller) async:send() end)
vim.defer_fn(function() async:send() end, 500) -- force a try_recv after 500ms
local filetype = vim.filetype.match({ buf = buffer })
vim.api.nvim_set_option_value("filetype", filetype, { buf = buffer })
print(" ++ attached to buffer " .. name)
require('codemp.window').update()
return controller
end
---@param name string
--TODO this should happen at the level above (Workspace) but accesses tables on this level, badly designed!
local function detach(name)
local buffer = buffer_id_map[name]
id_buffer_map[buffer] = nil
buffer_id_map[name] = nil
session.workspace:detach_buffer(name)
vim.api.nvim_buf_delete(buffer, {})
print(" -- detached from buffer " .. name)
require('codemp.window').update()
end
---@param buffer? integer if provided, sync given buffer id, otherwise sync current buf
local function sync(buffer)
if buffer == nil then
buffer = vim.api.nvim_get_current_buf()
end
local name = id_buffer_map[buffer]
if name ~= nil then
local controller = session.workspace:get_buffer(name)
if controller ~= nil then
local real_content = controller:content():await()
local my_content = utils.buffer.get_content(buffer)
if real_content ~= my_content then
ticks[buffer] = vim.api.nvim_buf_get_changedtick(buffer)
utils.buffer.set_content(buffer, real_content)
print(" !! re-synched buffer " .. name)
else
print(" :: buffer " .. name .. " is in sync")
end
return
end
end
print(" !! buffer not managed")
end
local function create(buffer)
if buffer == nil then
buffer = vim.fn.expand("%p")
end
if session.workspace == nil then
error("join a workspace first")
end
session.workspace:create_buffer(buffer):await()
print(" ++ created buffer " .. buffer)
require('codemp.window').update()
end
return {
sync = sync,
attach = attach,
detach = detach,
create = create,
map = id_buffer_map,
map_rev = buffer_id_map,
ticks = ticks,
users = user_buffer_name,
}