+)
+
+;;; @ Entity Representation and Implementation
+;;;
+
+(defmacro mime-entity-send (entity message &rest args)
+ `(luna-send ,entity ',(intern (format "mime-%s" (eval message))) ,@args))
+
+(defun mime-open-entity (type location)
+ "Open an entity and return it.
+TYPE is representation-type.
+LOCATION is location of entity. Specification of it is depended on
+representation-type."
+ (require (intern (format "mm%s" type)))
+ (luna-make-entity (mm-expand-class-name type) :location location))
+
+(luna-define-generic mime-entity-cooked-p (entity)
+ "Return non-nil if contents of ENTITY has been already code-converted.")
+
+
+;;; @ Entity as node of message
+;;;
+
+(defun mime-entity-children (entity)
+ (or (mime-entity-children-internal entity)
+ (luna-send entity 'mime-entity-children entity)))
+
+(defalias 'mime-entity-node-id 'mime-entity-node-id-internal)
+
+(defun mime-entity-number (entity)
+ "Return entity-number of ENTITY."
+ (reverse (mime-entity-node-id-internal entity)))
+
+(defun mime-find-entity-from-number (entity-number &optional message)
+ "Return entity from ENTITY-NUMBER in MESSAGE.
+If MESSAGE is not specified, `mime-message-structure' is used."
+ (or message
+ (setq message mime-message-structure))
+ (let ((sn (car entity-number)))
+ (if (null sn)
+ message
+ (let ((rc (nth sn (mime-entity-children message))))
+ (if rc
+ (mime-find-entity-from-number (cdr entity-number) rc)
+ ))
+ )))
+
+(defun mime-find-entity-from-node-id (entity-node-id &optional message)
+ "Return entity from ENTITY-NODE-ID in MESSAGE.
+If MESSAGE is not specified, `mime-message-structure' is used."
+ (mime-find-entity-from-number (reverse entity-node-id) message))
+
+(defun mime-find-entity-from-content-id (cid &optional message)
+ "Return entity from CID in MESSAGE.
+If MESSAGE is not specified, `mime-message-structure' is used."
+ (or message
+ (setq message mime-message-structure))
+ (if (equal cid (mime-entity-read-field message "Content-Id"))
+ message
+ (let ((children (mime-entity-children message))
+ ret)
+ (while (and children
+ (null (setq ret (mime-find-entity-from-content-id
+ cid (car children)))))
+ (setq children (cdr children)))
+ ret)))
+
+(defun mime-entity-parent (entity &optional message)
+ "Return mother entity of ENTITY.
+If MESSAGE is specified, it is regarded as root entity."
+ (if (equal entity message)
+ nil
+ (mime-entity-parent-internal entity)))
+
+(defun mime-root-entity-p (entity &optional message)
+ "Return t if ENTITY is root-entity (message).
+If MESSAGE is specified, it is regarded as root entity."
+ (null (mime-entity-parent entity message)))
+
+
+;;; @ Header buffer
+;;;
+
+(luna-define-generic mime-entity-header-buffer (entity))
+
+(luna-define-generic mime-goto-header-start-point (entity)
+ "Set buffer and point to header-start-position of ENTITY.")
+
+(luna-define-generic mime-entity-header-start-point (entity)
+ "Return header-start-position of ENTITY.")
+
+(luna-define-generic mime-entity-header-end-point (entity)
+ "Return header-end-position of ENTITY.")
+
+
+;;; @ Body buffer
+;;;
+
+(luna-define-generic mime-entity-body-buffer (entity))
+
+(luna-define-generic mime-goto-body-start-point (entity)
+ "Set buffer and point to body-start-position of ENTITY.")
+
+(luna-define-generic mime-goto-body-end-point (entity)
+ "Set buffer and point to body-end-position of ENTITY.")
+
+(luna-define-generic mime-entity-body-start-point (entity)
+ "Return body-start-position of ENTITY.")
+
+(define-obsolete-function-alias
+ 'mime-entity-body-start 'mime-entity-body-start-point)
+
+(luna-define-generic mime-entity-body-end-point (entity)
+ "Return body-end-position of ENTITY.")