emacs: Introduce generic boolean term escaping function

[notmuch] / emacs / notmuch-lib.el

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index 69867ada9a6a68ff7cb7851e25cbb7b232c1d10c..eeb005ffed21806294970ceeb76c593eeaee610d 100644 (file)
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -161,9 +161,23 @@ the user hasn't set this variable with the old or new value."
        "[No Subject]"
       subject)))
 
+(defun notmuch-escape-boolean-term (term)
+  "Escape a boolean term for use in a query.
+
+The caller is responsible for prepending the term prefix and a
+colon.  This performs minimal escaping in order to produce
+user-friendly queries."
+
+  (save-match-data
+    (if (or (equal term "")
+           (string-match "[ ()]\\|^\"" term))
+       ;; Requires escaping
+       (concat "\"" (replace-regexp-in-string "\"" "\"\"" term t t) "\"")
+      term)))
+
 (defun notmuch-id-to-query (id)
   "Return a query that matches the message with id ID."
-  (concat "id:\"" (replace-regexp-in-string "\"" "\"\"" id t t) "\""))
+  (concat "id:" (notmuch-escape-boolean-term id)))
 
 ;;