+;;; @ Entity Representation and Implementation
+;;;
+
+(defsubst mime-find-function (service type)
+ (let ((imps (cdr (assq type mime-entity-implementation-alist))))
+ (if imps
+ (cdr (assq service imps))
+ (require (intern (format "mm%s" type)))
+ (cdr (assq service
+ (cdr (assq type mime-entity-implementation-alist))))
+ )))
+
+(defsubst mime-entity-function (entity service)
+ (mime-find-function service
+ (mime-entity-representation-type-internal entity)))
+
+(defsubst mime-entity-send (entity message &rest args)
+ "Send MESSAGE to ENTITY with ARGS, and return the result."
+ (apply (mime-find-function
+ message (mime-entity-representation-type-internal entity))
+ entity
+ args))
+
+(defmacro mm-define-generic (name args &optional doc)
+ (if doc
+ `(defun ,(intern (format "mime-%s" name)) ,args
+ ,doc
+ (mime-entity-send ,(car args) ',name
+ ,@(mm-arglist-to-arguments (cdr args)))
+ )
+ `(defun ,(intern (format "mime-%s" name)) ,args
+ (mime-entity-send ,(car args) ',name
+ ,@(mm-arglist-to-arguments (cdr args)))
+ )))
+
+(put 'mm-define-generic 'lisp-indent-function 'defun)
+
+(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."
+ (let ((entity (make-mime-entity-internal type location)))
+ (mime-entity-send entity 'initialize-instance)
+ entity))
+
+(mm-define-generic 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)
+ (mime-entity-send entity 'entity-children)))
+
+(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-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)))
+
+
+;;; @ Entity Buffer
+;;;
+
+(defun mime-entity-buffer (entity)
+ (or (mime-entity-buffer-internal entity)
+ (mime-entity-send entity 'entity-buffer)))
+
+(mm-define-generic entity-point-min (entity)
+ "Return the start point of ENTITY in the buffer which contains ENTITY.")
+
+(mm-define-generic entity-point-max (entity)
+ "Return the end point of ENTITY in the buffer which contains ENTITY.")
+
+(defun mime-entity-header-start (entity)
+ (or (mime-entity-header-start-internal entity)
+ (mime-entity-send entity 'entity-header-start)))
+
+(defun mime-entity-header-end (entity)
+ (or (mime-entity-header-end-internal entity)
+ (mime-entity-send entity 'entity-header-end)))
+
+(defun mime-entity-body-start (entity)
+ (or (mime-entity-body-start-internal entity)
+ (mime-entity-send entity 'entity-body-start)))
+
+(defun mime-entity-body-end (entity)
+ (or (mime-entity-body-end-internal entity)
+ (mime-entity-send entity 'entity-body-end)))
+
+
+;;; @ Entity Header