Fix #129 (experimental)

lua/cmp/core.lua

@@ -1,6 +1,6 @@
 local debug = require('cmp.utils.debug')
 local char = require('cmp.utils.char')
-local str = require('cmp.utils.str')
+local pattern = require('cmp.utils.pattern')
 local async = require('cmp.utils.async')
 local keymap = require('cmp.utils.keymap')
 local context = require('cmp.context')
@@ -130,6 +130,7 @@ end
 
 ---Check auto-completion
 core.on_change = function(event)
+  core.autoindent(event, function()
     local ctx = core.get_context({ reason = types.cmp.ContextReason.Auto })
 
     -- Skip autocompletion when the item is selected manually.
@@ -151,6 +152,25 @@ core.on_change = function(event)
     else
       debug.log('unchanged')
     end
+  end)
+end
+
+---Check autoindent
+---@param event cmp.TriggerEvent
+---@param callback function
+core.autoindent = function(event, callback)
+  if event == types.cmp.TriggerEvent.TextChanged then
+    local ctx = context.new()
+    local prefix = pattern.matchstr('[^[:blank:]]\\+$', ctx.cursor_before_line)
+    if prefix then
+      for _, key in ipairs(vim.split(vim.bo.indentkeys, ',')) do
+        if vim.tbl_contains({ '=' .. prefix, '0=' .. prefix }, key) then
+          return keymap.feedkeys(keymap.t('<C-f>'), 'n', callback)
+        end
+      end
+    end
+  end
+  callback()
 end
 
 ---Invoke completion

lua/cmp/utils/pattern.lua

@@ -17,5 +17,13 @@ pattern.offset = function(p, text)
   return nil, nil
 end
 
+pattern.matchstr = function(p, text)
+  local s, e = pattern.offset(p, text)
+  if s then
+    return string.sub(text, s, e)
+  end
+  return nil
+end
+
 return pattern