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feat: add LibStub and CallbackHandler-1.0 for Ace3 addon compatibility

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Implement LibStub — the universal library version management system that
virtually every WoW addon framework depends on (Ace3, LibDataBroker,
LibSharedMedia, etc.). Without LibStub, most popular addons fail to load.

Also implement CallbackHandler-1.0 — the standard event callback library
used by Ace3-based addons for inter-module communication. Supports
RegisterCallback, UnregisterCallback, UnregisterAllCallbacks, and Fire.

These two libraries unlock the entire Ace3 addon ecosystem.
This commit is contained in:
Kelsi 2026-03-21 02:15:50 -07:00
parent c20db42479
commit 855f00c5b5
1 changed files with 60 additions and 0 deletions
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60
src/addons/lua_engine.cpp
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@ -2599,6 +2599,66 @@ void LuaEngine::registerCoreAPI() {
"end\n" "end\n"
); );
// LibStub — universal library version management used by Ace3 and virtually all addon libs.
// This is the standard WoW LibStub implementation that addons embed/expect globally.
luaL_dostring(L_,
"local LibStub = LibStub or {}\n"
"LibStub.libs = LibStub.libs or {}\n"
"LibStub.minors = LibStub.minors or {}\n"
"function LibStub:NewLibrary(major, minor)\n"
" assert(type(major) == 'string', 'LibStub:NewLibrary: bad argument #1 (string expected)')\n"
" minor = assert(tonumber(minor or (type(minor) == 'string' and minor:match('(%d+)'))), 'LibStub:NewLibrary: bad argument #2 (number expected)')\n"
" local oldMinor = self.minors[major]\n"
" if oldMinor and oldMinor >= minor then return nil end\n"
" local lib = self.libs[major] or {}\n"
" self.libs[major] = lib\n"
" self.minors[major] = minor\n"
" return lib, oldMinor\n"
"end\n"
"function LibStub:GetLibrary(major, silent)\n"
" if not self.libs[major] and not silent then\n"
" error('Cannot find a library instance of \"' .. tostring(major) .. '\".')\n"
" end\n"
" return self.libs[major], self.minors[major]\n"
"end\n"
"function LibStub:IterateLibraries() return pairs(self.libs) end\n"
"setmetatable(LibStub, { __call = LibStub.GetLibrary })\n"
"_G['LibStub'] = LibStub\n"
);
// CallbackHandler-1.0 — minimal implementation for Ace3-based addons
luaL_dostring(L_,
"if LibStub then\n"
" local CBH = LibStub:NewLibrary('CallbackHandler-1.0', 7)\n"
" if CBH then\n"
" CBH.mixins = { 'RegisterCallback', 'UnregisterCallback', 'UnregisterAllCallbacks', 'Fire' }\n"
" function CBH:New(target, regName, unregName, unregAllName, onUsed)\n"
" local registry = setmetatable({}, { __index = CBH })\n"
" registry.callbacks = {}\n"
" target = target or {}\n"
" target[regName or 'RegisterCallback'] = function(self, event, method, ...)\n"
" if not registry.callbacks[event] then registry.callbacks[event] = {} end\n"
" local handler = type(method) == 'function' and method or self[method]\n"
" registry.callbacks[event][self] = handler\n"
" end\n"
" target[unregName or 'UnregisterCallback'] = function(self, event)\n"
" if registry.callbacks[event] then registry.callbacks[event][self] = nil end\n"
" end\n"
" target[unregAllName or 'UnregisterAllCallbacks'] = function(self)\n"
" for event, handlers in pairs(registry.callbacks) do handlers[self] = nil end\n"
" end\n"
" registry.Fire = function(self, event, ...)\n"
" if not self.callbacks[event] then return end\n"
" for obj, handler in pairs(self.callbacks[event]) do\n"
" handler(obj, event, ...)\n"
" end\n"
" end\n"
" return registry\n"
" end\n"
" end\n"
"end\n"
);
// Noop stubs for commonly called functions that don't need implementation // Noop stubs for commonly called functions that don't need implementation
luaL_dostring(L_, luaL_dostring(L_,
"function SetDesaturation() end\n" "function SetDesaturation() end\n"