+(defvar notmuch-show-message-begin-regexp "\fmessage{")
+(defvar notmuch-show-message-end-regexp "\fmessage}")
+(defvar notmuch-show-header-begin-regexp "\fheader{")
+(defvar notmuch-show-header-end-regexp "\fheader}")
+(defvar notmuch-show-body-begin-regexp "\fbody{")
+(defvar notmuch-show-body-end-regexp "\fbody}")
+(defvar notmuch-show-attachment-begin-regexp "\fattachment{")
+(defvar notmuch-show-attachment-end-regexp "\fattachment}")
+(defvar notmuch-show-part-begin-regexp "\fpart{")
+(defvar notmuch-show-part-end-regexp "\fpart}")
+(defvar notmuch-show-marker-regexp "\f\\(message\\|header\\|body\\|attachment\\|part\\)[{}].*$")
+
+(defvar notmuch-show-id-regexp "ID: \\([^ ]*\\)")
+
+(defun notmuch-show-get-message-id ()
+ (save-excursion
+ (beginning-of-line)
+ (if (not (looking-at notmuch-show-message-begin-regexp))
+ (re-search-backward notmuch-show-message-begin-regexp))
+ (re-search-forward notmuch-show-id-regexp)
+ (buffer-substring (match-beginning 1) (match-end 1))))
+
+(defun notmuch-show-next-message ()
+ "Advance point to the beginning of the next message in the buffer.
+
+Before moving, also remove the \"unread\" tag from the current message."
+ (interactive)
+ (notmuch-call-notmuch-process "tag" "-unread" (concat "id:" (notmuch-show-get-message-id)))
+ ; First, ensure we get off the current message marker
+ (if (not (eobp))
+ (forward-char))
+ (re-search-forward notmuch-show-message-begin-regexp nil t)
+ ; This dance might look pointless, but it's important. I originally
+ ; just had (beginning-of-line) here which looked right on the
+ ; display but actually put point all the way back to the first
+ ; character of the first invisible line. That is, it put point into
+ ; the closing markers of the previous message rather than at the
+ ; beginning of the current message. And that in turn meant that
+ ; looking up the current message-ID would actually return the
+ ; previous message ID.
+ ;
+ ; So this dance ensures that we're actually on the current message
+ ; when it looks like we are.
+ (end-of-visible-line)
+ (beginning-of-line)
+ (recenter 0))
+
+(defun notmuch-show-previous-message ()
+ "Advance point to the beginning of the previous message in the buffer."
+ (interactive)
+ ; First, ensure we get off the current message marker
+ (if (not (bobp))
+ (previous-line))
+ (re-search-backward notmuch-show-message-begin-regexp nil t)
+ ; This dance might look pointless, but it's important. I originally
+ ; just had (beginning-of-line) here which looked right on the
+ ; display but actually put point all the way back to the first
+ ; character of the first invisible line. That is, it put point into
+ ; the closing markers of the previous message rather than at the
+ ; beginning of the current message. And that in turn meant that
+ ; looking up the current message-ID would actually return the
+ ; previous message ID.
+ ;
+ ; So this dance ensures that we're actually on the current message
+ ; when it looks like we are.
+ (end-of-visible-line)
+ (beginning-of-line)
+ (recenter 0))
+
+(defun notmuch-show-markup-citations-region (beg end)
+ (goto-char beg)
+ (beginning-of-line)
+ (while (< (point) end)
+ (let ((beg-sub (point)))
+ (if (looking-at ">")
+ (progn
+ (while (looking-at ">")
+ (next-line))
+ (let ((overlay (make-overlay beg-sub (point))))
+ (overlay-put overlay 'invisible 'notmuch-show-citation)
+ (overlay-put overlay 'before-string
+ (concat "[" (number-to-string (count-lines beg-sub (point)))
+ " quoted lines.]")))))
+ (if (looking-at "--[ ]?$")
+ (let ((overlay (make-overlay beg-sub end)))
+ (overlay-put overlay 'invisible 'notmuch-show-signature)
+ (overlay-put overlay 'before-string
+ (concat "[" (number-to-string (count-lines beg-sub (point)))
+ "-line signature.]"))
+ (goto-char end)))
+ (next-line))))
+
+(defun notmuch-show-markup-body (unread)
+ (re-search-forward notmuch-show-body-begin-regexp)
+ (next-line 1)
+ (beginning-of-line)
+ (let ((beg (point)))
+ (re-search-forward notmuch-show-body-end-regexp)
+ (if (not unread)
+ (overlay-put (make-overlay beg (match-beginning 0))
+ 'invisible 'notmuch-show-body-read))
+ (notmuch-show-markup-citations-region beg (point))
+ ))
+
+(defun notmuch-show-markup-header ()
+ (re-search-forward notmuch-show-header-begin-regexp)
+ (next-line 2)
+ (beginning-of-line)
+ (let ((beg (point)))
+ (re-search-forward notmuch-show-header-end-regexp)
+ (overlay-put (make-overlay beg (match-beginning 0))
+ 'invisible 'notmuch-show-header)))
+
+(defun notmuch-show-markup-message ()
+ (if (re-search-forward notmuch-show-message-begin-regexp nil t)
+ (progn
+ (let ((unread (looking-at ".*unread$")))
+ (notmuch-show-markup-header)
+ (notmuch-show-markup-body unread)))
+ (goto-char (point-max))))
+
+(defun notmuch-show-hide-markers ()
+ (save-excursion
+ (goto-char (point-min))
+ (while (not (eobp))
+ (if (re-search-forward notmuch-show-marker-regexp nil t)
+ (progn
+ (overlay-put (make-overlay (match-beginning 0) (+ (match-end 0) 1))
+ 'invisible 'notmuch-show-marker))
+ (goto-char (point-max))))))
+
+(defun notmuch-show-markup-messages ()
+ (save-excursion
+ (goto-char (point-min))
+ (while (not (eobp))
+ (notmuch-show-markup-message)))
+ (notmuch-show-hide-markers))
+
+(defun notmuch-show-toggle-citations-visible ()
+ "Toggle visibility of citations"
+ (interactive)
+ (if notmuch-show-citations-visible
+ (add-to-invisibility-spec 'notmuch-show-citation)
+ (remove-from-invisibility-spec 'notmuch-show-citation))
+ (set 'notmuch-show-citations-visible (not notmuch-show-citations-visible))
+ ; Need to force the redisplay for some reason
+ (force-window-update)
+ (redisplay t))
+
+(defun notmuch-show-toggle-signatures-visible ()
+ "Toggle visibility of signatures"
+ (interactive)
+ (if notmuch-show-signatures-visible
+ (add-to-invisibility-spec 'notmuch-show-signature)
+ (remove-from-invisibility-spec 'notmuch-show-signature))
+ (set 'notmuch-show-signatures-visible (not notmuch-show-signatures-visible))
+ ; Need to force the redisplay for some reason
+ (force-window-update)
+ (redisplay t))
+
+(defun notmuch-show-toggle-headers-visible ()
+ "Toggle visibility of header fields"
+ (interactive)
+ (if notmuch-show-headers-visible
+ (add-to-invisibility-spec 'notmuch-show-header)
+ (remove-from-invisibility-spec 'notmuch-show-header))
+ (set 'notmuch-show-headers-visible (not notmuch-show-headers-visible))
+ ; Need to force the redisplay for some reason
+ (force-window-update)
+ (redisplay t))
+
+(defun notmuch-show-toggle-body-read-visible ()
+ "Toggle visibility of message bodies of read messages"
+ (interactive)
+ (if notmuch-show-body-read-visible
+ (add-to-invisibility-spec 'notmuch-show-body-read)
+ (remove-from-invisibility-spec 'notmuch-show-body-read))
+ (set 'notmuch-show-body-read-visible (not notmuch-show-body-read-visible))
+ ; Need to force the redisplay for some reason
+ (force-window-update)
+ (redisplay t))
+