mirror of
https://github.com/d0zingcat/rime_wanxiang.git
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61 lines
2.0 KiB
Lua
61 lines
2.0 KiB
Lua
-- 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
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--@amzxyz
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--https://github.com/amzxyz
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local M = {}
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local ACCEPT, PASS = 1, 2
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local MAX_REPEAT = 8 -- 连续重复输入声母上限
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local MAX_SEGMENTS = 40 -- 允许的最大“分段”数
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local INITIALS = "[bpmfdtnlgkhjqxrzcsywiu]"
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-- 计算末尾重复
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local function tail_rep(s)
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local last, n = s:sub(-1), 1
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for i = #s - 1, 1, -1 do
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if s:sub(i, i) == last then n = n + 1 else break end
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end
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return last, n
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end
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-- 在候选栏最后一个 segment 加提示
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local function prompt(ctx, msg)
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local comp = ctx.composition
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if comp and not comp:empty() then comp:back().prompt = msg end
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end
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function M.func(key, env)
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local ctx, kc = env.engine.context, key.keycode
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-- 先拿到“上一轮”高亮候选的 preedit 及段数
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local cand = ctx:get_selected_candidate()
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local preedit = cand and (cand.preedit or cand:get_genuine().preedit) or ""
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local segs = 1
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for _ in preedit:gmatch("[%'%s]") do segs = segs + 1 end
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-- 本次按键字符（只关心字母 / 分隔符）
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local ch
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if kc >= 0x61 and kc <= 0x7A then -- a~z
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ch = string.char(kc)
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elseif kc == 0x27 then -- '
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ch = "'"
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elseif kc == 0x20 then -- space
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ch = " "
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end
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-- ① 连续声母限制：第 MAX_REPEAT 个同声母直接拦截
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if ch and kc >= 0x61 and kc <= 0x7A then
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local nxt = ctx.input .. ch
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local last, rep_n = tail_rep(nxt)
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if last:match(INITIALS) and rep_n > MAX_REPEAT then
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prompt(ctx, " 〔已超最大重复声母〕")
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return ACCEPT
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end
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end
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-- ② 分段限制：第 MAX_SEGMENTS 段拦截
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local segs_after = segs
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if ch == "'" or ch == " " then segs_after = segs + 1 end
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if segs_after >= MAX_SEGMENTS and kc >= 0x61 and kc <= 0x7A then
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prompt(ctx, " 〔已超最大输入长度〕")
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return ACCEPT
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end
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return PASS
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end
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return M |