1 files changed, 53 insertions, 0 deletions
diff --git a/start/cmp/lua/cmp/utils/autocmd.lua b/start/cmp/lua/cmp/utils/autocmd.lua
new file mode 100644
index 0000000..438e231
--- /dev/null
+++ b/start/cmp/lua/cmp/utils/autocmd.lua
@@ -0,0 +1,53 @@
+local debug = require('cmp.utils.debug')
+
+local autocmd = {}
+
+autocmd.group = vim.api.nvim_create_augroup('___cmp___', { clear = true })
+
+autocmd.events = {}
+
+---Subscribe autocmd
+---@param events string|string[]
+---@param callback function
+---@return function
+autocmd.subscribe = function(events, callback)
+  events = type(events) == 'string' and { events } or events
+
+  for _, event in ipairs(events) do
+    if not autocmd.events[event] then
+      autocmd.events[event] = {}
+      vim.api.nvim_create_autocmd(event, {
+        desc = ('nvim-cmp: autocmd: %s'):format(event),
+        group = autocmd.group,
+        callback = function()
+          autocmd.emit(event)
+        end,
+      })
+    end
+    table.insert(autocmd.events[event], callback)
+  end
+
+  return function()
+    for _, event in ipairs(events) do
+      for i, callback_ in ipairs(autocmd.events[event]) do
+        if callback_ == callback then
+          table.remove(autocmd.events[event], i)
+          break
+        end
+      end
+    end
+  end
+end
+
+---Emit autocmd
+---@param event string
+autocmd.emit = function(event)
+  debug.log(' ')
+  debug.log(string.format('>>> %s', event))
+  autocmd.events[event] = autocmd.events[event] or {}
+  for _, callback in ipairs(autocmd.events[event]) do
+    callback()
+  end
+end
+
+return autocmd