Mercurial > lxmppd-hg-xmllex / file comparison
comparison: util/events.lua
util/events.lua
- changeset 3501
- 90c18e0355af
- parent 3500
- a49ed9166820
- child 3778
- bc4f67a0658d
equal
deleted
inserted
replaced
| 3500:a49ed9166820 | 3501:90c18e0355af |
|---|---|
| 8 | 8 |
| 9 | 9 |
| 10 local pairs = pairs; | 10 local pairs = pairs; |
| 11 local t_insert = table.insert; | 11 local t_insert = table.insert; |
| 12 local t_sort = table.sort; | 12 local t_sort = table.sort; |
| 13 local setmetatable = setmetatable; | |
| 14 local next = next; | |
| 13 | 15 |
| 14 module "events" | 16 module "events" |
| 15 | 17 |
| 16 function new() | 18 function new() |
| 17 local handlers = {}; | 19 local handlers = {}; |
| 18 local event_map = {}; | 20 local event_map = {}; |
| 19 local function _rebuild_index(event) -- TODO optimize index rebuilding | 21 local function _rebuild_index(handlers, event) |
| 20 local _handlers = event_map[event]; | 22 local _handlers = event_map[event]; |
| 23 if not _handlers or next(_handlers) == nil then return; end | |
| 21 local index = {}; | 24 local index = {}; |
| 22 for handler in pairs(_handlers) do | 25 for handler in pairs(_handlers) do |
| 23 t_insert(index, handler); | 26 t_insert(index, handler); |
| 24 end | 27 end |
| 25 t_sort(index, function(a, b) return _handlers[a] > _handlers[b]; end); | 28 t_sort(index, function(a, b) return _handlers[a] > _handlers[b]; end); |
| 26 handlers[event] = index; | 29 handlers[event] = index; |
| 30 return index; | |
| 27 end; | 31 end; |
| 32 setmetatable(handlers, { __index = _rebuild_index }); | |
| 28 local function add_handler(event, handler, priority) | 33 local function add_handler(event, handler, priority) |
| 29 local map = event_map[event]; | 34 local map = event_map[event]; |
| 30 if map then | 35 if map then |
| 31 map[handler] = priority or 0; | 36 map[handler] = priority or 0; |
| 32 else | 37 else |
| 33 map = {[handler] = priority or 0}; | 38 map = {[handler] = priority or 0}; |
| 34 event_map[event] = map; | 39 event_map[event] = map; |
| 35 end | 40 end |
| 36 _rebuild_index(event); | 41 handlers[event] = nil; |
| 37 end; | 42 end; |
| 38 local function remove_handler(event, handler) | 43 local function remove_handler(event, handler) |
| 39 local map = event_map[event]; | 44 local map = event_map[event]; |
| 40 if map then | 45 if map then |
| 41 map[handler] = nil; | 46 map[handler] = nil; |
| 42 _rebuild_index(event); | 47 handlers[event] = nil; |
| 43 end | 48 end |
| 44 end; | 49 end; |
| 45 local function add_handlers(handlers) | 50 local function add_handlers(handlers) |
| 46 for event, handler in pairs(handlers) do | 51 for event, handler in pairs(handlers) do |
| 47 add_handler(event, handler); | 52 add_handler(event, handler); |
