docs: add festival configuration helper

lua/Trans/content.lua

@@ -53,7 +53,9 @@ local content = {
         local window = self.window
         api.nvim_buf_set_lines(window.bufnr, offset, offset + 1, true, self.lines)
 
-        for _, hl in ipairs(self.highlights) do
+        local hl
+        for i = 1, self.hl_size  do
+            hl = self.highlights[i]
             api.nvim_buf_add_highlight(window.bufnr, window.hl, hl.name, offset + hl.line, hl._start, hl._end)
         end
         self.window:bufset('modifiable', false)

lua/Trans/view/hover.lua

@@ -175,15 +175,14 @@ local process = {
 }
 
 
-local cmd_id
-local pin = false
-
 local try_del_keymap = function()
     for _, key in pairs(conf.hover.keymap) do
         pcall(vim.keymap.del, 'n', key, { buffer = true })
     end
 end
 
+local cmd_id
+local pin = false
 local action
 local next
 local _word
@@ -255,13 +254,11 @@ action = {
         end
     end,
 
-    play = function()
-        if vim.fn.has('linux') == 1 then
-            vim.fn.jobstart('echo ' .. _word .. ' | festival --tts')
-        else
-            local file = debug.getinfo(1, "S").source:sub(2):match('(.*)lua/') .. 'tts/say.js'
-            vim.fn.jobstart('node ' .. file .. ' ' .. _word)
-        end
+    play = vim.fn.has('linux') == 1 and function()
+        vim.fn.jobstart('echo ' .. _word .. ' | festival --tts')
+    end or function()
+        local file = debug.getinfo(1, "S").source:sub(2):match('(.*)lua/') .. 'tts/say.js'
+        vim.fn.jobstart('node ' .. file .. ' ' .. _word)
     end,
 }