X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=emacs%2Fnotmuch-lib.el;h=e16a1b971bd5e29bb3b78ba9f3a823c0b39acb85;hp=d4b668496e51cb48355473c6427facc6170d0cee;hb=0c565fa29fc29f74209d4343e2fc88f3b8008aaa;hpb=021906d6ec60360b5587ae08657fd6caa9a71b17

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index d4b66849..e16a1b97 100644
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -192,8 +192,8 @@ Otherwise the output will be returned"
 "Perhaps you haven't run \"notmuch setup\" yet? Try running this
 on the command line, and then retry your notmuch command")))
 
-(defun notmuch-version ()
-  "Return a string with the notmuch version number."
+(defun notmuch-cli-version ()
+  "Return a string with the notmuch cli command version number."
   (let ((long-string
 	 ;; Trim off the trailing newline.
 	 (substring (notmuch-command-to-string "--version") 0 -1)))
@@ -529,25 +529,67 @@ the given type."
    (lambda (part) (notmuch-match-content-type (plist-get part :content-type) type))
    parts))
 
-(defun notmuch-get-bodypart-binary (msg part process-crypto)
-  "Return the unprocessed content of PART in MSG.
+(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
-      (let ((coding-system-for-read 'no-conversion))
-	(apply #'call-process notmuch-command nil '(t nil) nil args)
-	(buffer-string)))))
-
-(defun notmuch-get-bodypart-content (msg part process-crypto)
-  (or (plist-get part :content)
-      (notmuch-get-bodypart-binary msg part process-crypto)))
+this does no charset conversion.
+
+If CACHE is non-nil, the content of this part will be saved in
+MSG (if it isn't already)."
+  (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
+	;; Cheat.  part is non-nil, and `plist-put' always modifies
+	;; the list in place if it's non-nil.
+	(plist-put part :binary-content data)))
+    data))
+
+(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
+string after performing content transfer decoding and any
+necessary charset decoding.  It is an error to use this for
+non-text/* parts.
+
+If CACHE is non-nil, the content of this part will be saved in
+MSG (if it isn't already)."
+  (let ((content (plist-get part :content)))
+    (when (not content)
+      ;; Use show --format=sexp to fetch decoded content
+      (let* ((args `("show" "--format=sexp" "--include-html"
+		     ,(format "--part=%s" (plist-get part :id))
+		     ,@(when process-crypto '("--decrypt"))
+		     ,(notmuch-id-to-query (plist-get msg :id))))
+	     (npart (apply #'notmuch-call-notmuch-sexp args)))
+	(setq content (plist-get npart :content))
+	(when (not content)
+	  (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
 ;; Emacs 24 if it attempts to use the shr renderer to display an HTML
@@ -568,18 +610,21 @@ this does no charset conversion."
 current buffer, if possible."
   (let ((display-buffer (current-buffer)))
     (with-temp-buffer
-      ;; In case there is :content, the content string is already converted
-      ;; into emacs internal format. `gnus-decoded' is a fake charset,
-      ;; which means no further decoding (to be done by mm- functions).
-      (let* ((charset (if (plist-member part :content)
-			  'gnus-decoded
+      ;; In case we already have :content, use it and tell mm-* that
+      ;; it's already been charset-decoded by using the fake
+      ;; `gnus-decoded' charset.  Otherwise, we'll fetch the binary
+      ;; part content and let mm-* decode it.
+      (let* ((have-content (plist-member part :content))
+	     (charset (if have-content 'gnus-decoded
 			(plist-get part :content-charset)))
 	     (handle (mm-make-handle (current-buffer) `(,content-type (charset . ,charset)))))
 	;; If the user wants the part inlined, insert the content and
 	;; test whether we are able to inline it (which includes both
 	;; capability and suitability tests).
 	(when (mm-inlined-p handle)
-	  (insert (notmuch-get-bodypart-content msg part process-crypto))
+	  (if have-content
+	      (insert (notmuch-get-bodypart-text msg part process-crypto))
+	    (insert (notmuch-get-bodypart-binary msg part process-crypto)))
 	  (when (mm-inlinable-p handle)
 	    (set-buffer display-buffer)
 	    (mm-display-part handle)