+(defgroup company-dabbrev nil
+ "dabbrev-like completion backend."
+ :group 'company)
+
+(defcustom company-dabbrev-other-buffers 'all
+ "Determines whether `company-dabbrev' should search other buffers.
+If `all', search all other buffers, except the ignored ones. If t, search
+buffers with the same major mode. See also `company-dabbrev-time-limit'."
+ :type '(choice (const :tag "Off" nil)
+ (const :tag "Same major mode" t)
+ (const :tag "All" all)))
+
+(defcustom company-dabbrev-ignore-buffers "\\`[ *]"
+ "Regexp matching the names of buffers to ignore."
+ :type 'regexp)
+
+(defcustom company-dabbrev-time-limit .1
+ "Determines how many seconds `company-dabbrev' should look for matches."
+ :type '(choice (const :tag "Off" nil)
+ (number :tag "Seconds")))
+
+(defcustom company-dabbrev-char-regexp "\\sw"
+ "A regular expression matching the characters `company-dabbrev' looks for."
+ :type 'regexp)
+
+(defcustom company-dabbrev-ignore-case 'keep-prefix
+ "Non-nil to ignore case when collecting completion candidates.
+When it's `keep-prefix', the text before point will remain unchanged after
+candidate is inserted, even some of its characters have different case.")
+
+(defcustom company-dabbrev-downcase 'case-replace
+ "Whether to downcase the returned candidates.
+
+The value of nil means keep them as-is.
+`case-replace' means use the value of `case-replace'.
+Any other value means downcase.
+
+If you set this value to nil, you may also want to set
+`company-dabbrev-ignore-case' to any value other than `keep-prefix'.")
+
+(defcustom company-dabbrev-minimum-length 4
+ "The minimum length for the completion candidate to be included.
+This variable affects both `company-dabbrev' and `company-dabbrev-code'."
+ :type 'integer
+ :package-version '(company . "0.8.3"))
+
+(defcustom company-dabbrev-ignore-invisible nil
+ "Non-nil to skip invisible text."
+ :type 'boolean
+ :package-version '(company . "0.9.0"))
+
+(defmacro company-dabrev--time-limit-while (test start limit &rest body)
+ (declare (indent 3) (debug t))
+ `(let ((company-time-limit-while-counter 0))
+ (catch 'done
+ (while ,test
+ ,@body
+ (and ,limit
+ (eq (cl-incf company-time-limit-while-counter) 25)
+ (setq company-time-limit-while-counter 0)
+ (> (float-time (time-since ,start)) ,limit)
+ (throw 'done 'company-time-out))))))
+
+(defun company-dabbrev--make-regexp (prefix)
+ (concat (if (equal prefix "")
+ (concat "\\(?:" company-dabbrev-char-regexp "\\)")
+ (regexp-quote prefix))
+ "\\(?:" company-dabbrev-char-regexp "\\)*"))
+
+(defun company-dabbrev--search-buffer (regexp pos symbols start limit
+ ignore-comments)