fix(keymap): avoid Luau callback timeouts (#76)

keymap/tests/niri_scale_test.lua

@@ -0,0 +1,84 @@
+local bindLines = { "binds {" }
+for index = 1, 93 do
+  if index % 20 == 1 then
+    bindLines[#bindLines + 1] = '    // #"Group ' .. tostring(math.floor(index / 20) + 1) .. '"'
+  end
+  bindLines[#bindLines + 1] = string.format(
+    '    Mod+Key%d repeat=false cooldown-ms=150 { focus-workspace %d; }', index, index
+  )
+end
+bindLines[#bindLines + 1] = "}"
+local source = table.concat(bindLines, "\n")
+
+local values, watchers = {
+  ["keymap.snapshot"] = {
+    status = "ready", compositor = "Niri", total = 1,
+    categories = { { name = "Previous", binds = { { id = "previous" } } } },
+  },
+}, {}
+local reads = 0
+local xorCalls = 0
+local loadingCategoryCount = -1
+local originalBit32 = bit32
+bit32 = {
+  bxor = function(left, right)
+    xorCalls = xorCalls + 1
+    local result, place = 0, 1
+    for _ = 1, 8 do
+      if left % 2 ~= right % 2 then result = result + place end
+      left = math.floor(left / 2)
+      right = math.floor(right / 2)
+      place = place * 2
+    end
+    return result
+  end,
+}
+
+noctalia = {
+  state = {
+    get = function(key) return values[key] end,
+    set = function(key, value)
+      if key == "keymap.snapshot" and value.status == "loading" then
+        loadingCategoryCount = #(value.categories or {})
+      end
+      values[key] = value
+      if watchers[key] ~= nil then watchers[key](value) end
+    end,
+    watch = function(key, callback) watchers[key] = callback end,
+  },
+  getConfig = function(key)
+    return ({ compositor = "niri", niri_config = "/fixture/config.kdl", merge_sequential = false })[key]
+  end,
+  getenv = function(key) return key == "NIRI_SOCKET" and "test" or "" end,
+  fileExists = function(path) return path == "/fixture/config.kdl" end,
+  listDir = function() return nil end,
+  readFile = function(path)
+    if path ~= "/fixture/config.kdl" then return nil end
+    reads = reads + 1
+    return source
+  end,
+  tr = function(key, args)
+    if args ~= nil and args.action ~= nil then return args.action end
+    return key == "category.other" and "Other" or key
+  end,
+}
+
+assert(loadfile("niri_service.luau"))()
+bit32 = originalBit32
+
+local snapshot = values["keymap.snapshot"]
+assert(snapshot.status == "ready", "large Niri fixture did not parse")
+assert(snapshot.total == 93, "large Niri fixture lost binds")
+assert(#snapshot.categories == 5, "large Niri fixture lost category markers")
+assert(reads == 1, "Niri root config should only be read once per refresh")
+assert(loadingCategoryCount == 0, "loading snapshot should not reserialize the previous bind tree")
+assert(xorCalls > 0, "Niri parser did not use the native-xor fingerprint path")
+
+for _, category in ipairs(snapshot.categories) do
+  for _, bind in ipairs(category.binds) do
+    assert(bind.id:match("^niri:[0-9a-f]+$"), "invalid bind fingerprint")
+    assert(bind.fingerprint:match("^[0-9a-f]+$"), "invalid source fingerprint")
+  end
+end
+
+print("niri scale tests: ok")