+;;;
+;; Completion
+(defvar wl-folder-complete-folder-candidate nil)
+
+(defun wl-folder-complete-folder (string predicate flag)
+ (cond ((or (string-match "^\\(/[^/]*/\\)\\(.*\\)$" string) ; filter
+ (string-match "^\\(\*\\|\*.*,\\)\\([^,]*\\)$" string) ; multi
+ (string-match "^\\(|[^|]*|:?\\)\\(.*\\)$" string) ;pipe-src
+ (string-match "^\\(|\\)\\([^|]*\\)$" string)) ;pipe-dst
+ (let* ((str1 (match-string 1 string))
+ (str2 (match-string 2 string))
+ (str2-comp (wl-folder-complete-folder str2 predicate flag)))
+ (cond
+ ((listp str2-comp) ; flag=t
+ (mapcar (lambda (x) (concat str1 x)) str2-comp))
+ ((stringp str2-comp)
+ (concat str1 str2-comp))
+ (t
+ str2-comp))))
+ ((string-match "^\\(/\\)\\([^/]*\\)$" string) ; filter-condition
+ (let* ((str1 (match-string 1 string))
+ (str2 (match-string 2 string))
+ (str2-comp
+ (wl-folder-complete-filter-condition str2 predicate flag)))
+ (cond
+ ((listp str2-comp) ; flag=t
+ (mapcar (lambda (x) (concat str1 x)) str2-comp))
+ ((stringp str2-comp)
+ (concat str1 str2-comp))
+ (t
+ str2-comp))))
+ (t
+ (let ((candidate
+ (or wl-folder-complete-folder-candidate
+ (if (memq 'read-folder wl-use-folder-petname)
+ (wl-folder-get-entity-with-petname)
+ wl-folder-entity-hashtb))))
+ (if (not flag)
+ (try-completion string candidate)
+ (all-completions string candidate))))))
+
+(defun wl-folder-complete-filter-condition (string predicate flag)
+ (cond
+ ((string-match "^\\(.*|\\|.*&\\|.*!\\|.*(\\)\\([^:]*\\)$" string)
+ (let* ((str1 (match-string 1 string))
+ (str2 (match-string 2 string))
+ (str2-comp
+ (wl-folder-complete-filter-condition str2 predicate flag)))
+ (cond
+ ((listp str2-comp) ; flag=t
+ (mapcar (lambda (x) (concat str1 x)) str2-comp))
+ ((stringp str2-comp)
+ (concat str1 str2-comp))
+ (t
+ str2-comp))))
+ (t
+ (let ((candidate
+ (mapcar (lambda (x) (list (concat (downcase x) ":")))
+ (append '("last" "first"
+ "from" "subject" "to" "cc" "body"
+ "since" "before" "tocc")
+ elmo-msgdb-extra-fields))))
+ (if (not flag)
+ (try-completion string candidate)
+ (all-completions string candidate))))))
+