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emacs: Allow renderer of multipart/related parts access to non-primary parts.

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Typically used to allow a `text/html' renderer access to images which
are sent along with the HTML.

This is not enabled by default, instead the user must execute
`notmuch-show-setup-w3m' for it to take effect.

Edited-by: Carl Worth <cworth@cworth.org> Add documentation string for
notmuch-show-setup-23m and clean up warning about reference/assignment
of free variable.

Signed-off-by: Jameson Rollins <jrollins@finestructure.net>
This commit is contained in:
David Edmondson 2010-05-17 13:43:51 +01:00 committed by Carl Worth
parent 31bd2872c3
commit f3384a322e
1 changed files with 79 additions and 0 deletions
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79
emacs/notmuch-show.el
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@ -335,6 +335,85 @@ current buffer, if possible."
(indent-rigidly start (point) 1)))
t)
(defun notmuch-show-setup-w3m ()
"Instruct w3m how to retrieve content from a \"related\" part of a message."
(interactive)
(if (boundp 'w3m-cid-retrieve-function-alist)
(unless (assq 'notmuch-show-mode w3m-cid-retrieve-function-alist)
(push (cons 'notmuch-show-mode 'notmuch-show-w3m-cid-retrieve)
w3m-cid-retrieve-function-alist)))
(setq mm-inline-text-html-with-images t))
(defvar w3m-current-buffer) ;; From `w3m.el'.
(defvar notmuch-show-w3m-cid-store nil)
(make-variable-buffer-local 'notmuch-show-w3m-cid-store)
(defun notmuch-show-w3m-cid-store-internal (content-id
message-id
part-number
content-type
content)
(push (list content-id
message-id
part-number
content-type
content)
notmuch-show-w3m-cid-store))
(defun notmuch-show-w3m-cid-store (msg part)
(let ((content-id (plist-get part :content-id)))
(when content-id
(notmuch-show-w3m-cid-store-internal (concat "cid:" content-id)
(plist-get msg :id)
(plist-get part :id)
(plist-get part :content-type)
nil))))
(defun notmuch-show-w3m-cid-retrieve (url &rest args)
(let ((matching-part (with-current-buffer w3m-current-buffer
(assoc url notmuch-show-w3m-cid-store))))
(if matching-part
(let ((message-id (nth 1 matching-part))
(part-number (nth 2 matching-part))
(content-type (nth 3 matching-part))
(content (nth 4 matching-part)))
;; If we don't already have the content, get it and cache
;; it, as some messages reference the same cid: part many
;; times (hundreds!), which results in many calls to
;; `notmuch part'.
(unless content
(setq content (notmuch-show-get-bodypart-internal (concat "id:" message-id)
part-number))
(with-current-buffer w3m-current-buffer
(notmuch-show-w3m-cid-store-internal url
message-id
part-number
content-type
content)))
(insert content)
content-type)
nil)))
(defun notmuch-show-insert-part-multipart/related (msg part content-type nth depth declared-type)
(notmuch-show-insert-part-header nth declared-type content-type nil)
(let ((inner-parts (plist-get part :content))
(start (point)))
;; We assume that the first part is text/html and the remainder
;; things that it references.
;; Stash the non-primary parts.
(mapc (lambda (part)
(notmuch-show-w3m-cid-store msg part))
(cdr inner-parts))
;; Render the primary part.
(notmuch-show-insert-bodypart msg (car inner-parts) depth)
(when notmuch-show-indent-multipart
(indent-rigidly start (point) 1)))
t)
(defun notmuch-show-insert-part-multipart/* (msg part content-type nth depth declared-type)
(notmuch-show-insert-part-header nth declared-type content-type nil)
(let ((inner-parts (plist-get part :content))