(provide 'ew-var)

;;; user customizable variables.

(defvar ew-decode-sticked-encoded-word nil)
(defvar ew-decode-quoted-encoded-word nil)
(defvar ew-ignore-75bytes-limit nil)
(defvar ew-ignore-76bytes-limit nil)
(defvar ew-permit-sticked-comment nil)
(defvar ew-permit-sticked-special nil)

(defvar ew-parse-error-sit-for-seconds 0)

;;; anonymous function to decode ground string.
;; NOTE: STR is CRLF-form and it should return as CRLF-form.
(defvar ew-decode-us-ascii (lambda (str) (decode-coding-string str 'iso-latin-1-unix)))

;;;
(defvar ew-decode-field-syntax-alist
'((from                 ew-scan-unibyte-std11 . ew:tag-mailbox+)
  (sender               ew-scan-unibyte-std11 . ew:tag-mailbox)
  (to                   ew-scan-unibyte-std11 . ew:tag-address+)
  (resent-to            ew-scan-unibyte-std11 . ew:tag-address+)
  (cc                   ew-scan-unibyte-std11 . ew:tag-address+)
  (resent-cc            ew-scan-unibyte-std11 . ew:tag-address+)
  (bcc                  ew-scan-unibyte-std11 . ew:tag-address*)
  (resent-bcc           ew-scan-unibyte-std11 . ew:tag-address*)
  (message-id           ew-scan-unibyte-std11)
  (resent-message-id    ew-scan-unibyte-std11)
  (in-reply-to          ew-scan-unibyte-std11 . ew:tag-phrase-msg-id*)
  (references           ew-scan-unibyte-std11 . ew:tag-phrase-msg-id*)
  (keywords             ew-scan-unibyte-std11 . ew:tag-phrase*)
  (subject              ew-scan-unibyte-unstructured)
  (comments             ew-scan-unibyte-unstructured)
  (encrypted            ew-scan-unibyte-std11)
  (date                 ew-scan-unibyte-std11)
  (reply-to             ew-scan-unibyte-std11 . ew:tag-address+)
  (received             ew-scan-unibyte-std11)
  (resent-reply-to      ew-scan-unibyte-std11 . ew:tag-address+)
  (resent-from          ew-scan-unibyte-std11 . ew:tag-mailbox+)
  (resent-sender        ew-scan-unibyte-std11 . ew:tag-mailbox)
  (resent-date          ew-scan-unibyte-std11)
  (return-path          ew-scan-unibyte-std11)
  (mime-version         ew-scan-unibyte-std11)
  (content-type         ew-scan-unibyte-mime)
  (content-transfer-encoding    ew-scan-unibyte-mime)
  (content-id           ew-scan-unibyte-std11)
  (content-description  ew-scan-unibyte-unstructured)
  (content-disposition  ew-scan-unibyte-mime)
  (approved             ew-scan-unibyte-std11 . ew:tag-address+)
))

(defvar ew-decode-field-default-syntax '(ew-scan-unibyte-unstructured))

;;; constants.

(defconst ew-token-regexp "[-!#-'*+0-9A-Z^-~]+")
(defconst ew-encoded-text-regexp "[!->@-~]+")
(defconst ew-encoded-word-regexp
  (concat (regexp-quote "=?")
          "\\(" ew-token-regexp "\\)"
          (regexp-quote "?")
          "\\(" ew-token-regexp "\\)"
          (regexp-quote "?")
          "\\(" ew-encoded-text-regexp "\\)"
          (regexp-quote "?=")))

;;; utilities for variables.

(defun ew-dynamic-options ()
  (list
   ew-decode-sticked-encoded-word
   ew-decode-quoted-encoded-word
   ew-ignore-75bytes-limit
   ew-ignore-76bytes-limit
   ew-permit-sticked-comment
   ew-permit-sticked-special))