fix: return the latest instance instead of the first instance

lua/Trans/backend/youdao.lua

@@ -1,5 +1,12 @@
--- local GET = require("Trans.util.curl").GET
+---@class Youdao: TransBackend
+---@field uri string api uri
+---@field salt string
+---@field app_id string
+---@field app_passwd string
+---@field disable boolean
 
+
+-- local GET = require("Trans.util.curl").GET
 -- return function(word)
 --     local isEn = word:isEn()
 --     local result = {}

lua/Trans/core/backend.lua

@@ -20,11 +20,20 @@ if file then
     file:close()
 end
 
+local all_name = {}
+for name, opts in pairs(result) do
+    if opts.disable then
+        result[name] = nil
+    else
+        all_name[#all_name + 1] = name
+    end
+end
+
 
 ---@class Trans
 ---@field backend table<string, TransBackend>
 return setmetatable({
-    all_name = vim.tbl_keys(result),
+    all_name = Trans.conf.backend_order or all_name,
 }, {
     __index = function(self, name)
         ---@type TransBackend

lua/Trans/core/buffer.lua

@@ -79,20 +79,20 @@ function buffer:lines(i, j)
     return api.nvim_buf_get_lines(self.bufnr, i, j, false)
 end
 
----Add Extmark to buffer
----@param linenr number line number should be set[one index]
----@param col_start number column start
----@param col_end number column end
----@param hl_group string highlight group
----@param ns number? highlight namespace
-function buffer:add_extmark(linenr, col_start, col_end, hl_group, ns)
-    linenr = linenr and linenr - 1 or -1
-    api.nvim_buf_set_extmark(self.bufnr, ns or -1, linenr, col_start, {
-        end_line = linenr,
-        end_col = col_end,
-        hl_group = hl_group,
-    })
-end
+-- ---Add Extmark to buffer
+-- ---@param linenr number line number should be set[one index]
+-- ---@param col_start number column start
+-- ---@param col_end number column end
+-- ---@param hl_group string highlight group
+-- ---@param ns number? highlight namespace
+-- function buffer:add_extmark(linenr, col_start, col_end, hl_group, ns)
+--     linenr = linenr and linenr - 1 or -1
+--     api.nvim_buf_set_extmark(self.bufnr, ns or -1, linenr, col_start, {
+--         end_line = linenr,
+--         end_col = col_end,
+--         hl_group = hl_group,
+--     })
+-- end
 
 ---Add highlight to buffer
 ---@param linenr number line number should be set[one index]

lua/Trans/core/conf.lua

@@ -16,6 +16,7 @@ return {
     ---@type string the directory for database file and password file
     dir      = os.getenv('HOME') .. '/.vim/dict',
     query    = 'fallback',
+    -- backend_order = {},
     ---@type 'default' | 'dracula' | 'tokyonight' global Trans theme [see lua/Trans/style/theme.lua]
     theme    = 'default', -- default | tokyonight | dracula
     strategy = {

lua/Trans/core/frontend.lua

@@ -7,7 +7,10 @@ local frontend_opts = conf.frontend
 ---@param frontend TransFrontend
 local function set_frontend_keymap(frontend)
     local set = vim.keymap.set
-    local keymap_opts = { silent = true, expr = false, }
+    local keymap_opts = {
+        silent = true,
+        -- expr = true,
+    }
 
     for action, key in pairs(frontend.opts.keymaps) do
         set('n', key, function()

lua/Trans/frontend/hover/init.lua

@@ -34,7 +34,7 @@ end
 ---@return TransHover
 function M.get_active_instance()
     M.clear_dead_instance()
-    return M.queue[1]
+    return M.queue[#M.queue]
 end
 
 ---Clear dead instance