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buf.lua
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buf.lua
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local shared = require 'snippy.shared'
local Stop = require 'snippy.stop'
local api = vim.api
local fn = vim.fn
local cmd = vim.cmd
local M = {}
M._state = {}
setmetatable(M, {
__index = function (self, key)
if key == "current_stop" then
return self.state().current_stop
elseif key == "stops" then
return self.state().stops
else
return rawget(self, key)
end
end;
__newindex = function (self, key, value)
if key == "current_stop" then
self.state().current_stop = value
elseif key == "stops" then
self.state().stops = value
else
return rawset(self, key, value)
end
end
})
local function add_mark(id, startrow, startcol, endrow, endcol, right_gravity, end_right_gravity)
local mark = api.nvim_buf_set_extmark(0, shared.namespace, startrow, startcol, {
id = id;
end_line = endrow;
end_col = endcol;
hl_group = shared.config.hl_group;
right_gravity = right_gravity;
end_right_gravity = end_right_gravity;
})
return mark
end
function M.state()
local bufnr = api.nvim_buf_get_number(0)
if not M._state[bufnr] then
M._state[bufnr] = {
stops = {};
current_stop = 0;
}
end
return M._state[bufnr]
end
function M.add_stop(spec, pos)
local function is_traversable()
for _, stop in ipairs(M.state().stops) do
if stop.id == spec.id then
return false
end
end
return spec.type == 'tabstop' or spec.type == 'placeholder' or spec.type == 'choice'
end
local startrow = spec.startpos[1] - 1
local startcol = spec.startpos[2]
local endrow = spec.endpos[1] - 1
local endcol = spec.endpos[2]
local stops = M.state().stops
local smark = add_mark(nil, startrow, startcol, endrow, endcol, true, true)
table.insert(stops, pos, Stop.new({id=spec.id, traversable=is_traversable(), mark=smark, spec=spec}))
M.state().stops = stops
end
-- Change the extmarks to expand on change
function M.activate_stop(number)
local value = M.state().stops[number]
for _, stop in ipairs(M.state().stops) do
if stop.id == value.id then
local from, to = stop:get_range()
local mark_id = stop.mark
local _ = add_mark(mark_id, from[1], from[2], to[1], to[2], false, true)
end
end
M.state().current_stop = number
M.update_state()
end
-- Change the extmarks NOT to expand on change
function M.deactivate_stop(number)
local value = M.state().stops[number]
for _, stop in ipairs(M.state().stops) do
if stop.id == value.id then
local from, to = stop:get_range()
local mark_id = stop.mark
local _ = add_mark(mark_id, from[1], from[2], to[1], to[2], true, true)
end
end
end
-- function M.stops()
-- return M.state().stops
-- end
-- function M.set_stops(stops)
-- M.state().stops = stops
-- end
-- function M.current_stop()
-- return M.state().current_stop
-- end
-- function M.set_current_stop(number)
-- M.state().current_stop = number
-- end
function M.update_state()
local current_stop = M.stops[M.current_stop]
if not current_stop then
return
end
local before = current_stop:get_before()
M.state().before = before
end
function M.fix_current_stop()
local current_stop = M.stops[M.current_stop]
if not current_stop then
return
end
local new = current_stop:get_before()
local old = M.state().before or new
local current_line = api.nvim_get_current_line()
if new ~= old and current_line:sub(1, #old) == old then
local stop = M.stops[M.current_stop]
local from, to = stop:get_range()
add_mark(stop.mark, from[1], #old, to[1], to[2], false, true)
end
end
function M.clear_state()
for _, stop in pairs(M.state().stops) do
api.nvim_buf_del_extmark(0, shared.namespace, stop.mark)
end
M.state().current_stop = 0
M.state().stops = {}
M.state().before = nil
M.clear_autocmds()
end
function M.setup_autocmds()
local bufnr = api.nvim_buf_get_number(0)
api.nvim_exec(
string.format([[
augroup snippy_local
autocmd! * <buffer=%s>
autocmd TextChanged,TextChangedI <buffer=%s> lua require 'snippy'._handle_TextChanged()
autocmd TextChangedP <buffer=%s> lua require 'snippy'._handle_TextChangedP()
autocmd CursorMoved,CursorMovedI <buffer=%s> lua require 'snippy'._handle_CursorMoved()
augroup END
]], bufnr, bufnr, bufnr, bufnr),
false)
end
function M.clear_autocmds()
local bufnr = api.nvim_buf_get_number(0)
api.nvim_exec(
string.format([[
augroup snippy_local
autocmd! * <buffer=%s>
augroup END
]], bufnr),
false)
end
return M