flyspell.el (flyspell-word): Do not re-check known misspellings.

Avoid re-checking words already found as misspellings by 
(flyspell-large-region), just do highlighting. 

Patch by Brandon Craig Rhodes (bug#7322)

1 files changed, 34 insertions, 26 deletions

diff --git a/lisp/textmodes/flyspell.el b/lisp/textmodes/flyspell.el
index d698c4baeb7..b08b75c728b 100644
--- a/lisp/textmodes/flyspell.el
+++ b/lisp/textmodes/flyspell.el
@@ -1013,11 +1013,13 @@ Mostly we check word delimiters."
 ;;*---------------------------------------------------------------------*/
 ;;*    flyspell-word ...                                                */
 ;;*---------------------------------------------------------------------*/
-(defun flyspell-word (&optional following)
+(defun flyspell-word (&optional following known-misspelling)
   "Spell check a word.
 If the optional argument FOLLOWING, or, when called interactively
 `ispell-following-word', is non-nil, checks the following (rather
-than preceding) word when the cursor is not over a word."
+than preceding) word when the cursor is not over a word.  If
+optional argument KNOWN-MISSPELLING is non nil considers word a
+misspelling and skips redundant spell-checking step."
   (interactive (list ispell-following-word))
   (ispell-set-spellchecker-params)    ; Initialize variables and dicts alists
   (save-excursion
@@ -1078,29 +1080,35 @@ than preceding) word when the cursor is not over a word."
             (setq flyspell-word-cache-end end)
             (setq flyspell-word-cache-word word)
             ;; now check spelling of word.
-            (ispell-send-string "%\n")
-            ;; put in verbose mode
-            (ispell-send-string (concat "^" word "\n"))
-            ;; we mark the ispell process so it can be killed
-            ;; when emacs is exited without query
-            (set-process-query-on-exit-flag ispell-process nil)
-            ;; Wait until ispell has processed word.  Since this code is often
-            ;; executed from post-command-hook but the ispell process may not
-            ;; be responsive, it's important to make sure we re-enable C-g.
-            (with-local-quit
-              (while (progn
-                       (accept-process-output ispell-process)
-                       (not (string= "" (car ispell-filter))))))
-            ;; (ispell-send-string "!\n")
-            ;; back to terse mode.
-            ;; Remove leading empty element
-            (setq ispell-filter (cdr ispell-filter))
-            ;; ispell process should return something after word is sent.
-            ;; Tag word as valid (i.e., skip) otherwise
-            (or ispell-filter
-                (setq ispell-filter '(*)))
-            (if (consp ispell-filter)
-                (setq poss (ispell-parse-output (car ispell-filter))))
+            (if (not known-misspelling)
+                (progn
+                  (ispell-send-string "%\n")
+                  ;; put in verbose mode
+                  (ispell-send-string (concat "^" word "\n"))
+                  ;; we mark the ispell process so it can be killed
+                  ;; when emacs is exited without query
+                  (set-process-query-on-exit-flag ispell-process nil)
+                  ;; Wait until ispell has processed word.  Since this
+                  ;; code is often executed from post-command-hook but
+                  ;; the ispell process may not be responsive, it's
+                  ;; important to make sure we re-enable C-g.
+                  (with-local-quit
+                    (while (progn
+                             (accept-process-output ispell-process)
+                             (not (string= "" (car ispell-filter))))))
+                  ;; (ispell-send-string "!\n")
+                  ;; back to terse mode.
+                  ;; Remove leading empty element
+                  (setq ispell-filter (cdr ispell-filter))
+                  ;; ispell process should return something after word is sent.
+                  ;; Tag word as valid (i.e., skip) otherwise
+                  (or ispell-filter
+                      (setq ispell-filter '(*)))
+                  (if (consp ispell-filter)
+                      (setq poss (ispell-parse-output (car ispell-filter)))))
+              ;; Else, this was a known misspelling to begin with, and
+              ;; we should forge an ispell return value.
+              (setq poss (list word 0 '() '())))
             (let ((res (cond ((eq poss t)
                               ;; correct
                               (setq flyspell-word-cache-result t)
@@ -1433,7 +1441,7 @@ The buffer to mark them in is `flyspell-large-region-buffer'."
                                         t
                                       nil))))
                         (setq keep nil)
-                        (flyspell-word)
+                        (flyspell-word nil t)
                         ;; Search for next misspelled word will begin from
                         ;; end of last validated match.
                         (setq buffer-scan-pos (point))))