chore：新的根节点

lua/letter_selector.lua

@@ -0,0 +1,89 @@
+-- @amzxyz  https://github.com/amzxyz/rime_wanxiang
+-- 功能：仅在特定前缀或者tag模式下，按 qwertyuio 选择第 1~9 个候选
+
+local wanxiang = require("wanxiang")
+
+local M = {}
+
+-- 键码映射：q w e r t y u i o → 1..9
+local KEY2IDX = {
+    [0x71] = 1,  -- q
+    [0x77] = 2,  -- w
+    [0x65] = 3,  -- e
+    [0x72] = 4,  -- r
+    [0x74] = 5,  -- t
+    [0x79] = 6,  -- y
+    [0x75] = 7,  -- u
+    [0x69] = 8,  -- i
+    [0x6F] = 9,  -- o
+}
+
+-- 判断是否在命令模式
+local function is_function_mode_active(context)
+    if not context or not context.composition or context.composition:empty() then
+        return false
+    end
+    local seg = context.composition:back()
+    if not seg then return false end
+    return seg:has_tag("number") or seg:has_tag("Ndate")
+end
+
+-- 缓存命令模式的状态，避免每次按键都计算
+local function on_update(env, ctx)
+    env._fn_active = is_function_mode_active(ctx)
+end
+
+function M.init(env)
+    env._fn_active = false
+    env._upd_conn = env.engine.context.update_notifier:connect(function(ctx)
+        on_update(env, ctx)
+    end)
+end
+
+function M.fini(env)
+    if env._upd_conn then
+        env._upd_conn:disconnect()
+        env._upd_conn = nil
+    end
+end
+
+local function handle_key(key_event, env)
+    -- 只处理按下；有修饰键则忽略
+    if key_event:release() or key_event:ctrl() or key_event:alt() or key_event:super() then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+
+    local idx = KEY2IDX[key_event.keycode]
+    if not idx then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+
+    local context = env.engine.context
+    if not env._fn_active then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+    if not context or not context.composition or context.composition:empty() then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+
+    local seg = context.composition:back()
+    if not seg or not seg.menu then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+
+    -- 准备最多 9 个候选
+    local count = seg.menu:prepare(9)
+    if idx < 1 or idx > count then
+        return wanxiang.RIME_PROCESS_RESULTS.kNoop
+    end
+
+    -- 选择：候选索引从 0 开始
+    context:select(idx - 1)
+    return wanxiang.RIME_PROCESS_RESULTS.kAccepted
+end
+
+function M.func(key_event, env)
+    return handle_key(key_event, env)
+end
+
+return M