chore：新的根节点

lua/limit_repeated.lua

@@ -0,0 +1,61 @@
+-- 用于限制最大候选数量以及重复最大输入编码,防止卡顿性能异常
+--@amzxyz
+--https://github.com/amzxyz
+local M            = {}
+local ACCEPT, PASS = 1, 2
+
+local MAX_REPEAT   = 8  -- 连续重复输入声母上限
+local MAX_SEGMENTS = 40 -- 允许的最大“分段”数
+local INITIALS     = "[bpmfdtnlgkhjqxrzcsywiu]"
+
+-- 计算末尾重复
+local function tail_rep(s)
+    local last, n = s:sub(-1), 1
+    for i = #s - 1, 1, -1 do
+        if s:sub(i, i) == last then n = n + 1 else break end
+    end
+    return last, n
+end
+
+-- 在候选栏最后一个 segment 加提示
+local function prompt(ctx, msg)
+    local comp = ctx.composition
+    if comp and not comp:empty() then comp:back().prompt = msg end
+end
+
+function M.func(key, env)
+    local ctx, kc = env.engine.context, key.keycode
+    -- 先拿到“上一轮”高亮候选的 preedit 及段数
+    local cand    = ctx:get_selected_candidate()
+    local preedit = cand and (cand.preedit or cand:get_genuine().preedit) or ""
+    local segs    = 1
+    for _ in preedit:gmatch("[%'%s]") do segs = segs + 1 end
+    -- 本次按键字符（只关心字母 / 分隔符）
+    local ch
+    if kc >= 0x61 and kc <= 0x7A then -- a~z
+        ch = string.char(kc)
+    elseif kc == 0x27 then            -- '
+        ch = "'"
+    elseif kc == 0x20 then            -- space
+        ch = " "
+    end
+    -- ① 连续声母限制：第 MAX_REPEAT 个同声母直接拦截
+    if ch and kc >= 0x61 and kc <= 0x7A then
+        local nxt         = ctx.input .. ch
+        local last, rep_n = tail_rep(nxt)
+        if last:match(INITIALS) and rep_n > MAX_REPEAT then
+            prompt(ctx, "  〔已超最大重复声母〕")
+            return ACCEPT
+        end
+    end
+    -- ② 分段限制：第 MAX_SEGMENTS 段拦截
+    local segs_after = segs
+    if ch == "'" or ch == " " then segs_after = segs + 1 end
+    if segs_after >= MAX_SEGMENTS and kc >= 0x61 and kc <= 0x7A then
+        prompt(ctx, "  〔已超最大输入长度〕")
+        return ACCEPT
+    end
+    return PASS
+end
+
+return M