rearrangement.
[elisp/semi.git] / mime-view.el
index d735ea5..8c7fb6d 100644 (file)
@@ -33,6 +33,7 @@
 (require 'mime-parse)
 (require 'semi-def)
 (require 'calist)
+(require 'alist)
 (require 'mailcap)
 
 
 ;;; @@ in raw-buffer
 ;;;
 
-(defvar mime-raw-message-info
+(defvar mime-raw-message-info nil
   "Information about structure of message.
 Please use reference function `mime-entity-SLOT' to get value of SLOT.
 
 Following is a list of slots of the structure:
 
-node-id                reversed entity-number (list of integers)
-point-min      beginning point of region in raw-buffer
-point-max      end point of region in raw-buffer
-type           media-type (symbol)
-subtype                media-subtype (symbol)
-type/subtype   media-type/subtype (string or nil)
-parameters     parameter of Content-Type field (association list)
-encoding       Content-Transfer-Encoding (string or nil)
-children       entities included in this entity (list of content-infos)
+buffer                 buffer includes this entity (buffer).
+node-id                        node-id (list of integers)
+header-start           minimum point of header in raw-buffer
+header-end             maximum point of header in raw-buffer
+body-start             minimum point of body in raw-buffer
+body-end               maximum point of body in raw-buffer
+content-type           content-type (content-type)
+content-disposition    content-disposition (content-disposition)
+encoding               Content-Transfer-Encoding (string or nil)
+children               entities included in this entity (list of entity)
 
 If an entity includes other entities in its body, such as multipart or
 message/rfc822, `mime-entity' structures of them are included in
 `children', so the `mime-entity' structure become a tree.")
 (make-variable-buffer-local 'mime-raw-message-info)
 
+
 (defvar mime-preview-buffer nil
   "MIME-preview buffer corresponding with the (raw) buffer.")
 (make-variable-buffer-local 'mime-preview-buffer)
 
+
+(defvar mime-raw-representation-type nil
+  "Representation-type of mime-raw-buffer.
+It must be nil, `binary' or `cooked'.
+If it is nil, `mime-raw-representation-type-alist' is used as default
+value.
+Notice that this variable is usually used as buffer local variable in
+raw-buffer.")
+
+(make-variable-buffer-local 'mime-raw-representation-type)
+
 (defvar mime-raw-representation-type-alist
   '((mime-show-message-mode     . binary)
     (mime-temp-message-mode     . binary)
@@ -175,6 +189,17 @@ If optional argument MESSAGE-INFO is not specified,
            (setq children (cdr children)))
          message-info))))
 
+(defsubst mime-entity-parent (entity &optional message-info)
+  "Return mother entity of ENTITY.
+If optional argument MESSAGE-INFO is not specified,
+`mime-raw-message-info' in buffer of ENTITY is used."
+  (mime-raw-find-entity-from-node-id
+   (cdr (mime-entity-node-id entity))
+   (or message-info
+       (save-excursion
+        (set-buffer (mime-entity-buffer entity))
+        mime-raw-message-info))))
+
 (defsubst mime-raw-point-to-entity-node-id (point &optional message-info)
   "Return entity-node-id from POINT in mime-raw-buffer.
 If optional argument MESSAGE-INFO is not specified,
@@ -185,14 +210,7 @@ If optional argument MESSAGE-INFO is not specified,
   "Return entity-number from POINT in mime-raw-buffer.
 If optional argument MESSAGE-INFO is not specified,
 `mime-raw-message-info' is used."
-  (reverse (mime-raw-point-to-entity-node-id point message-info)))
-
-(defsubst mime-raw-entity-parent (entity &optional message-info)
-  "Return mother entity of ENTITY.
-If optional argument MESSAGE-INFO is not specified,
-`mime-raw-message-info' is used."
-  (mime-raw-find-entity-from-node-id (cdr (mime-entity-node-id entity))
-                                    message-info))
+  (mime-entity-number (mime-raw-find-entity-from-point point message-info)))
 
 (defun mime-raw-flatten-message-info (&optional message-info)
   "Return list of entity in mime-raw-buffer.
@@ -217,7 +235,7 @@ If optional argument MESSAGE-INFO is not specified,
 ;;; @@@ predicate function
 ;;;
 
-(defun mime-view-entity-button-visible-p (entity message-info)
+(defun mime-view-entity-button-visible-p (entity)
   "Return non-nil if header of ENTITY is visible.
 Please redefine this function if you want to change default setting."
   (let ((media-type (mime-entity-media-type entity))
@@ -225,8 +243,7 @@ Please redefine this function if you want to change default setting."
     (or (not (eq media-type 'application))
        (and (not (eq media-subtype 'x-selection))
             (or (not (eq media-subtype 'octet-stream))
-                (let ((mother-entity
-                       (mime-raw-entity-parent entity message-info)))
+                (let ((mother-entity (mime-entity-parent entity)))
                   (or (not (eq (mime-entity-media-type mother-entity)
                                'multipart))
                       (not (eq (mime-entity-media-subtype mother-entity)
@@ -237,7 +254,7 @@ Please redefine this function if you want to change default setting."
 ;;; @@@ entity button generator
 ;;;
 
-(defun mime-view-insert-entity-button (entity message-info subj)
+(defun mime-view-insert-entity-button (entity subject)
   "Insert entity-button of ENTITY."
   (let ((entity-node-id (mime-entity-node-id entity))
        (params (mime-entity-parameters entity)))
@@ -257,12 +274,12 @@ Please redefine this function if you want to change default setting."
                (setq access-type (cdr access-type))
                (if server
                    (format "%s %s ([%s] %s)"
-                           num subj access-type (cdr server))
+                           num subject access-type (cdr server))
                (let ((site (cdr (assoc "site" params)))
                      (dir (cdr (assoc "directory" params)))
                      )
                  (format "%s %s ([%s] %s:%s)"
-                         num subj access-type site dir)
+                         num subject access-type site dir)
                  )))
            )
           (t
@@ -271,7 +288,7 @@ Please redefine this function if you want to change default setting."
                  (charset (cdr (assoc "charset" params)))
                  (encoding (mime-entity-encoding entity)))
              (concat
-              num " " subj
+              num " " subject
               (let ((rest
                      (format " <%s/%s%s%s>"
                              media-type media-subtype
@@ -432,6 +449,12 @@ Each elements are regexp of field-name.")
    (body-presentation-method . mime-preview-text/plain)))
 
 (ctree-set-calist-strictly
+ 'mime-preview-condition
+ '((type . multipart)(subtype . alternative)
+   (body . visible)
+   (body-presentation-method . mime-preview-multipart/alternative)))
+
+(ctree-set-calist-strictly
  'mime-preview-condition '((type . message)(subtype . partial)
                           (body-presentation-method
                            . mime-preview-message/partial-button)))
@@ -485,12 +508,93 @@ Each elements are regexp of field-name.")
        (default-situation
          (cdr (assq 'childrens-situation situation))))
     (while children
-      (mime-view-display-entity (car children) mime-raw-message-info
+      (mime-view-display-entity (car children)
+                               (save-excursion
+                                 (set-buffer mime-raw-buffer)
+                                 mime-raw-message-info)
                                mime-raw-buffer (current-buffer)
                                default-situation)
       (setq children (cdr children))
       )))
 
+(defcustom mime-view-type-subtype-score-alist
+  '(((text . enriched) . 3)
+    ((text . richtext) . 2)
+    ((text . plain)    . 1)
+    (t . 0))
+  "Alist MEDIA-TYPE vs corresponding score.
+MEDIA-TYPE must be (TYPE . SUBTYPE), TYPE or t.  t means default."
+  :group 'mime-view
+  :type '(repeat (cons (choice :tag "Media-Type"
+                              (item :tag "Type/Subtype"
+                                    (cons symbol symbol))
+                              (item :tag "Type" symbol)
+                              (item :tag "Default" t))
+                      integer)))
+
+(defun mime-preview-multipart/alternative (entity situation)
+  (let* ((children (mime-entity-children entity))
+        (default-situation
+          (cdr (assq 'childrens-situation situation)))
+        (i 0)
+        (p 0)
+        (max-score 0)
+        (situations
+         (mapcar (function
+                  (lambda (child)
+                    (let ((situation
+                           (or (ctree-match-calist
+                                mime-preview-condition
+                                (append
+                                 (or (mime-entity-content-type child)
+                                     (make-mime-content-type 'text 'plain))
+                                 (list* (cons 'encoding
+                                              (mime-entity-encoding child))
+                                        (cons 'major-mode major-mode)
+                                        default-situation)))
+                               default-situation)))
+                      (if (cdr (assq 'body-presentation-method situation))
+                          (let ((score
+                                 (cdr
+                                  (or (assoc
+                                       (cons
+                                        (cdr (assq 'type situation))
+                                        (cdr (assq 'subtype situation)))
+                                       mime-view-type-subtype-score-alist)
+                                      (assq
+                                       (cdr (assq 'type situation))
+                                       mime-view-type-subtype-score-alist)
+                                      (assq
+                                       t
+                                       mime-view-type-subtype-score-alist)
+                                      ))))
+                            (if (> score max-score)
+                                (setq p i
+                                      max-score score)
+                              )))
+                      (setq i (1+ i))
+                      situation)
+                    ))
+                 children)))
+    (setq i 0)
+    (while children
+      (let ((situation (car situations)))
+       (mime-view-display-entity (car children)
+                                 (save-excursion
+                                   (set-buffer mime-raw-buffer)
+                                   mime-raw-message-info)
+                                 mime-raw-buffer (current-buffer)
+                                 default-situation
+                                 (if (= i p)
+                                     situation
+                                   (del-alist 'body-presentation-method
+                                              (copy-alist situation))))
+       )
+      (setq children (cdr children)
+           situations (cdr situations)
+           i (1+ i))
+      )))
+
 
 ;;; @ acting-condition
 ;;;
@@ -726,7 +830,8 @@ The compressed face will be piped to this command.")
   )
 
 (defun mime-view-display-entity (entity message-info ibuf obuf
-                                       default-situation)
+                                       default-situation
+                                       &optional situation)
   (let* ((start (mime-entity-point-min entity))
         (end (mime-entity-point-max entity))
          (content-type (mime-entity-content-type entity))
@@ -744,29 +849,30 @@ The compressed face will be piped to this command.")
       (narrow-to-region start end)
       (setq subj (eword-decode-string (mime-raw-get-subject entity)))
       )
-    (let* ((situation
-           (or
-            (ctree-match-calist mime-preview-condition
-                                (append
-                                 (or content-type
-                                     (make-mime-content-type 'text 'plain))
-                                 (list* (cons 'encoding   encoding)
-                                        (cons 'major-mode major-mode)
-                                        default-situation)))
-            default-situation))
-          (button-is-invisible
-           (eq (cdr (assq 'entity-button situation)) 'invisible))
-          (header-is-visible
-           (eq (cdr (assq 'header situation)) 'visible))
-          (body-presentation-method
-           (cdr (assq 'body-presentation-method situation)))
-          (children (mime-entity-children entity)))
+    (or situation
+       (setq situation
+             (or (ctree-match-calist mime-preview-condition
+                                     (append
+                                      (or content-type
+                                          (make-mime-content-type
+                                           'text 'plain))
+                                      (list* (cons 'encoding   encoding)
+                                             (cons 'major-mode major-mode)
+                                             default-situation)))
+                 default-situation)))
+    (let ((button-is-invisible
+          (eq (cdr (assq 'entity-button situation)) 'invisible))
+         (header-is-visible
+          (eq (cdr (assq 'header situation)) 'visible))
+         (body-presentation-method
+          (cdr (assq 'body-presentation-method situation)))
+         (children (mime-entity-children entity)))
       (set-buffer obuf)
       (setq nb (point))
       (narrow-to-region nb nb)
       (or button-is-invisible
-         (if (mime-view-entity-button-visible-p entity message-info)
-             (mime-view-insert-entity-button entity message-info subj)
+         (if (mime-view-entity-button-visible-p entity)
+             (mime-view-insert-entity-button entity subj)
            ))
       (if header-is-visible
          (save-restriction
@@ -794,7 +900,7 @@ The compressed face will be piped to this command.")
            (t
             (when button-is-invisible
               (goto-char (point-max))
-              (mime-view-insert-entity-button entity message-info subj)
+              (mime-view-insert-entity-button entity subj)
               )
             (or header-is-visible
                 (progn