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--- @class blink.cmp.EventEmitter<T> : { event: string, autocmd?: string, listeners: table<fun(data: T)>, new: ( fun(event: string, autocmd: string): blink.cmp.EventEmitter ), on: ( fun(self: blink.cmp.EventEmitter, callback: fun(data: T)) ), off: ( fun(self: blink.cmp.EventEmitter, callback: fun(data: T)) ), emit: ( fun(self: blink.cmp.EventEmitter, data?: table) ) };
--- TODO: is there a better syntax for this?
local event_emitter = {}
--- @param event string
--- @param autocmd? string
function event_emitter.new(event, autocmd)
local self = setmetatable({}, { __index = event_emitter })
self.event = event
self.autocmd = autocmd
self.listeners = {}
return self
end
function event_emitter:on(callback) table.insert(self.listeners, callback) end
function event_emitter:off(callback)
for idx, cb in ipairs(self.listeners) do
if cb == callback then table.remove(self.listeners, idx) end
end
end
function event_emitter:emit(data)
data = data or {}
data.event = self.event
for _, callback in ipairs(self.listeners) do
callback(data)
end
if self.autocmd then
require('blink.cmp.lib.utils').schedule_if_needed(
function() vim.api.nvim_exec_autocmds('User', { pattern = self.autocmd, modeline = false, data = data }) end
)
end
end
return event_emitter
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