From: David Bremner <bremner@unb.ca>
Date: Fri, 12 Feb 2010 02:34:31 +0000 (-0400)
Subject: notmuch-show-get-header: new function; return alist of parsed header fields.
X-Git-Tag: 0.1~89
X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=commitdiff_plain;h=e6c6bf3250475ead63a8306342d3af1d2d48e18a

notmuch-show-get-header: new function; return alist of parsed header fields.

This function parses the displayed message to recover header
fields. It uses mailheader.el to do the actual header parsing, after
preprocessing to remove indentation.  It relies on the variables
notmuch-show-message-begin-regexp, notmuch-show-header-begin-regexp,
and notmuch-show-message-end-regexp.
---

diff --git a/notmuch.el b/notmuch.el
index 5fc38bf7..977ee278 100644
--- a/notmuch.el
+++ b/notmuch.el
@@ -225,6 +225,30 @@ Unlike builtin `previous-line' this version accepts no arguments."
     (re-search-forward notmuch-show-tags-regexp)
     (split-string (buffer-substring (match-beginning 1) (match-end 1)))))
 
+(defun notmuch-show-get-header ()
+  "Retrieve and parse the header from the current message. Returns an alist with of (header . value)
+where header is a symbol and value is a string.  The summary from notmuch-show is returned as the
+pseudoheader summary"
+  (require 'mailheader)
+  (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 (concat notmuch-show-header-begin-regexp "\n[[:space:]]*\\(.*\\)\n"))
+    (let* ((summary (buffer-substring-no-properties (match-beginning 1) (match-end 1)))
+	  (beg (point)))
+      (re-search-forward notmuch-show-header-end-regexp)
+      (let ((text (buffer-substring beg (match-beginning 0))))
+	(with-temp-buffer
+	  (insert text)
+	  (goto-char (point-min))
+	  (while (looking-at "\\([[:space:]]*\\)[A-Za-z][-A-Za-z0-9]*:")
+	    (delete-region (match-beginning 1) (match-end 1))
+	    (forward-line)
+	    )
+	  (goto-char (point-min))
+	  (cons (cons 'summary summary) (mail-header-extract-no-properties)))))))
+
 (defun notmuch-show-add-tag (&rest toadd)
   "Add a tag to the current message."
   (interactive