dev (#1)

* dev

* Improve sync design

* Support buffer local mapping

* tmp

* tmp

* tmp

* tmp

* tmp

* tmp

* tmp

* tmp

* tmp

* tmp

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* tmp

* tmp

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* stylua

* tmp

* tmp

* tmp

* tmp

* tmp

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* tmp

* integration

* tmp

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* update

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lua/cmp/config.lua

@@ -0,0 +1,63 @@
+local cache = require('cmp.utils.cache')
+local misc = require('cmp.utils.misc')
+
+---@class cmp.Config
+---@field public g cmp.ConfigSchema
+local config = {}
+
+---@type cmp.Cache
+config.cache = cache.new()
+
+---@type cmp.ConfigSchema
+config.global = require('cmp.config.default')()
+
+---@type table<number, cmp.ConfigSchema>
+config.buffers = {}
+
+---Set configuration for global.
+---@param c cmp.ConfigSchema
+config.set_global = function(c)
+  config.global = misc.merge(c, config.global)
+  config.global.revision = config.global.revision or 1
+  config.global.revision = config.global.revision + 1
+end
+
+---Set configuration for buffer
+---@param c cmp.ConfigSchema
+---@param bufnr number|nil
+config.set_buffer = function(c, bufnr)
+  config.buffers[bufnr] = c
+  config.buffers[bufnr].revision = config.buffers[bufnr].revision or 1
+  config.buffers[bufnr].revision = config.buffers[bufnr].revision + 1
+end
+
+---@return cmp.ConfigSchema
+config.get = function()
+  local global = config.global
+  local buffer = config.buffers[vim.api.nvim_get_current_buf()] or { revision = 1 }
+  return config.cache:ensure({ 'get', global.revision or 0, buffer.revision or 0 }, function()
+    return misc.merge(buffer, global)
+  end)
+end
+
+---Return source option
+---@param name string
+---@return table
+config.get_source_option = function(name)
+  local global = config.global
+  local buffer = config.buffers[vim.api.nvim_get_current_buf()] or { revision = 1 }
+  return config.cache:ensure({ 'get_source_config', global.revision or 0, buffer.revision or 0, name }, function()
+    local c = config.get()
+    for _, s in ipairs(c.sources) do
+      if s.name == name then
+        if type(s.opts) == 'table' then
+          return s.opts
+        end
+        return {}
+      end
+    end
+    return nil
+  end)
+end
+
+return config