From 1c75d622c9d2ff2531c3c9a4a1d9a1856907c907 Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Sat, 31 Oct 2009 01:41:44 -0700
Subject: [PATCH] notmuch.el: Enter now calls "notmuch show" on the current
 thread

It's remarkable how little code we need for a very functional GUI
here. I think we're doing something right.
---
 notmuch.el | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 48 insertions(+), 1 deletion(-)

diff --git a/notmuch.el b/notmuch.el
index 32c2887b..010fc2ff 100644
--- a/notmuch.el
+++ b/notmuch.el
@@ -31,17 +31,53 @@
 ; Authors: Roland McGrath <roland@gnu.org>,
 ;	    Daniel Pfeiffer <occitan@esperanto.org>
 
+(defvar notmuch-show-mode-map
+  (let ((map (make-sparse-keymap)))
+    (define-key map "x" 'kill-this-buffer)
+    map)
+  "Keymap for \"notmuch show\" buffers.")
+(fset 'notmuch-show-mode-map notmuch-show-mode-map)
+
+;;;###autoload
+(defun notmuch-show-mode ()
+  "Major mode for handling the output of \"notmuch show\""
+  (interactive)
+  (kill-all-local-variables)
+  (use-local-map notmuch-show-mode-map)
+  (setq major-mode 'notmuch-show-mode
+	mode-name "notmuch-show")
+  (setq buffer-read-only t))
+
+(defun notmuch-show (thread-id)
+  "Run \"notmuch show\" with the given thread ID and display results."
+  (interactive "sNotmuch show: ")
+  (let ((buffer (get-buffer-create (concat "*notmuch-show-" thread-id))))
+    (switch-to-buffer buffer)
+    (notmuch-show-mode)
+    (let ((proc (get-buffer-process (current-buffer)))
+	  (inhibit-read-only t))
+      (if proc
+	  (error "notmuch search process already running for query `%s'" query)
+	)
+      (erase-buffer)
+      (beginning-of-buffer)
+      (save-excursion
+	(call-process "notmuch" nil t nil "show" thread-id)
+	)
+      )))
+
 (defvar notmuch-search-mode-map
   (let ((map (make-sparse-keymap)))
     (define-key map "n" 'next-line)
     (define-key map "p" 'previous-line)
+    (define-key map "\r" 'notmuch-search-show-thread)
     map)
   "Keymap for \"notmuch search\" buffers.")
 (fset 'notmuch-search-mode-map notmuch-search-mode-map)
 
 ;;;###autoload
 (defun notmuch-search-mode ()
-  "Major mode for handling the output of notmuch search"
+  "Major mode for handling the output of \"notmuch search\""
   (interactive)
   (kill-all-local-variables)
   (use-local-map notmuch-search-mode-map)
@@ -49,6 +85,17 @@
 	mode-name "notmuch-search")
   (setq buffer-read-only t))
 
+(defun notmuch-search-find-thread-id ()
+  (save-excursion
+    (beginning-of-line)
+    (let ((beg (point)))
+      (re-search-forward "[a-fA-F0-9]*")
+      (filter-buffer-substring beg (point)))))
+
+(defun notmuch-search-show-thread ()
+  (interactive)
+  (notmuch-show (notmuch-search-find-thread-id)))
+
 (defun notmuch-search (query)
   "Run \"notmuch search\" with the given query string and display results."
   (interactive "sNotmuch search: ")