On Mon, 21 Apr 2014, Austin Clements <amdragon at MIT.EDU> wrote:
> (The actual code change here is small, but requires re-indenting
> existing code.)
> ---
> emacs/notmuch-lib.el | 52 ++++++++++++++++++++++++++++++----------------------
> 1 file changed, 30 insertions(+), 22 deletions(-)
>
> diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
> index fc67b14..fee8512 100644
> --- a/emacs/notmuch-lib.el
> +++ b/emacs/notmuch-lib.el
> @@ -503,33 +503,39 @@ (defun notmuch-parts-filter-by-type (parts type)
> (lambda (part) (notmuch-match-content-type (plist-get part :content-type) type))
> parts))
>
> -(defun notmuch-get-bodypart-binary (msg part process-crypto)
> +(defun notmuch-get-bodypart-binary (msg part process-crypto &optional cache)
> "Return the unprocessed content of PART in MSG as a unibyte string.
>
> This returns the \"raw\" content of the given part after content
> transfer decoding, but with no further processing (see the
> discussion of --format=raw in man notmuch-show). In particular,
> this does no charset conversion."
> - (let ((args `("show" "--format=raw"
> - ,(format "--part=%d" (plist-get part :id))
> - ,@(when process-crypto '("--decrypt"))
> - ,(notmuch-id-to-query (plist-get msg :id)))))
> - (with-temp-buffer
> - ;; Emacs internally uses a UTF-8-like multibyte string
> - ;; representation by default (regardless of the coding system,
> - ;; which only affects how it goes from outside data to this
> - ;; internal representation). This *almost* never matters.
> - ;; Annoyingly, it does matter if we use this data in an image
> - ;; descriptor, since Emacs will use its internal data buffer
> - ;; directly and this multibyte representation corrupts binary
> - ;; image formats. Since the caller is asking for binary data, a
> - ;; unibyte string is a more appropriate representation anyway.
> - (set-buffer-multibyte nil)
> - (let ((coding-system-for-read 'no-conversion))
> - (apply #'call-process notmuch-command nil '(t nil) nil args)
> - (buffer-string)))))
> -
> -(defun notmuch-get-bodypart-text (msg part process-crypto)
> + (let ((data (plist-get part :binary-content)))
> + (when (not data)
> + (let ((args `("show" "--format=raw"
> + ,(format "--part=%d" (plist-get part :id))
> + ,@(when process-crypto '("--decrypt"))
> + ,(notmuch-id-to-query (plist-get msg :id)))))
> + (with-temp-buffer
> + ;; Emacs internally uses a UTF-8-like multibyte string
> + ;; representation by default (regardless of the coding
> + ;; system, which only affects how it goes from outside data
> + ;; to this internal representation). This *almost* never
> + ;; matters. Annoyingly, it does matter if we use this data
> + ;; in an image descriptor, since Emacs will use its internal
> + ;; data buffer directly and this multibyte representation
> + ;; corrupts binary image formats. Since the caller is
> + ;; asking for binary data, a unibyte string is a more
> + ;; appropriate representation anyway.
> + (set-buffer-multibyte nil)
> + (let ((coding-system-for-read 'no-conversion))
> + (apply #'call-process notmuch-command nil '(t nil) nil args)
> + (setq data (buffer-string)))))
> + (when cache
> + (plist-put part :binary-content data)))
> + data))
I am a little puzzled by this but that could be lack of familiarity with
elisp. As far as I can see plist-put will sometimes modify the original
plist and sometimes return a new plist. If the latter happens then I
think it works out as if we hadn't cached anything as the part passed to
the function is unmodified. That might not matter in this case (though I
find the lack of determinism disturbing).
Or is something else going on?
Best wishes
Mark
> +
> +(defun notmuch-get-bodypart-text (msg part process-crypto &optional cache)
> "Return the text content of PART in MSG.
>
> This returns the content of the given part as a multibyte Lisp
> @@ -546,7 +552,9 @@ (defun notmuch-get-bodypart-text (msg part process-crypto)
> (npart (apply #'notmuch-call-notmuch-sexp args)))
> (setq content (plist-get npart :content))
> (when (not content)
> - (error "Internal error: No :content from %S" args))))
> + (error "Internal error: No :content from %S" args)))
> + (when cache
> + (plist-put part :content content)))
> content))
>
> ;; Workaround: The call to `mm-display-part' below triggers a bug in
> --
> 1.9.1
>
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