Add keyword_length option

README.md

@@ -17,6 +17,13 @@ require'cmp'.setup {
 The below source configuration are available.
 
 
+### keyword_length (type: number)
+
+_Default:_ `3`
+
+Specify word length to gather.
+
+
 ### keyword_pattern (type: string)
 
 _Default:_ `[[\%(-\?\d\+\%(\.\d\+\)\?\|\h\w*\%([\-.]\w*\)*\)]]`

lua/cmp_buffer/buffer.lua

@@ -1,6 +1,7 @@
 ---@class cmp_buffer.Buffer
 ---@field public bufnr number
 ---@field public regexes any[]
+---@field public length number
 ---@field public pattern string
 ---@field public timer any|nil
 ---@field public words table<number, string[]>
@@ -9,12 +10,14 @@ local buffer = {}
 
 ---Create new buffer object
 ---@param bufnr number
+---@param length number
 ---@param pattern string
 ---@return cmp_buffer.Buffer
-function buffer.new(bufnr, pattern)
+function buffer.new(bufnr, length, pattern)
   local self = setmetatable({}, { __index = buffer })
   self.bufnr = bufnr
   self.regexes = {}
+  self.length = length
   self.pattern = pattern
   self.timer = nil
   self.words = {}
@@ -103,7 +106,7 @@ function buffer.index_line(self, i, line)
     local s, e = self:matchstrpos(buf)
     if s then
       local word = string.sub(buf, s, e - 1)
-      if #word > 1 then
+      if #word >= self.length then
         table.insert(words, word)
       end
     end

lua/cmp_buffer/init.lua

@@ -1,6 +1,7 @@
 local buffer = require('cmp_buffer.buffer')
 
 local defaults = {
+  keyword_length = 3,
   keyword_pattern = [[\%(-\?\d\+\%(\.\d\+\)\?\|\h\w*\%([\-]\w*\)*\)]],
   get_bufnrs = function()
     return { vim.api.nvim_get_current_buf() }
@@ -18,6 +19,7 @@ end
 source.get_keyword_pattern = function(_, params)
   params.option = vim.tbl_deep_extend('keep', params.option, defaults)
   vim.validate({
+    keyword_length = { params.option.keyword_length, 'number', '`opts.keyword_length` must be `number`' },
     keyword_pattern = { params.option.keyword_pattern, 'string', '`opts.keyword_pattern` must be `string`' },
     get_bufnrs = { params.option.get_bufnrs, 'function', '`opts.get_bufnrs` must be `function`' },
   })
@@ -64,7 +66,11 @@ source._get_buffers = function(self, params)
   local buffers = {}
   for _, bufnr in ipairs(params.option.get_bufnrs()) do
     if not self.buffers[bufnr] then
-      local new_buf = buffer.new(bufnr, params.option.keyword_pattern)
+      local new_buf = buffer.new(
+        bufnr,
+        params.option.keyword_length,
+        params.option.keyword_pattern
+      )
       new_buf:index()
       new_buf:watch()
       self.buffers[bufnr] = new_buf