Synch to No Gnus 200504221124.
[elisp/gnus.git-] / lisp / gnus-art.el
index caf46cf..0b80072 100644 (file)
@@ -3007,81 +3007,72 @@ lines forward."
          (forward-line 1)
        (setq ended t)))))
 
-(defun article-date-ut (&optional type highlight header)
+(defun article-date-ut (&optional type highlight)
   "Convert DATE date to universal time in the current article.
 If TYPE is `local', convert to local time; if it is `lapsed', output
 how much time has lapsed since DATE.  For `lapsed', the value of
 `gnus-article-date-lapsed-new-header' says whether the \"X-Sent:\" header
 should replace the \"Date:\" one, or should be added below it."
   (interactive (list 'ut t))
-  (let* ((header (or header
-                    (and (eq 1 (point-min))
-                         (mail-header-date (save-excursion
-                                             (set-buffer gnus-summary-buffer)
-                                             gnus-current-headers)))
-                    (message-fetch-field "date")
-                    ""))
-        (date (if (vectorp header) (mail-header-date header)
-                header))
+  (let* ((tdate-regexp "^Date:[ \t]\\|^X-Sent:[ \t]")
+        (date-regexp (if (and gnus-article-date-lapsed-new-header
+                              (eq type 'lapsed))
+                         "^X-Sent:[ \t]"
+                       tdate-regexp))
+        (case-fold-search t)
+        (inhibit-read-only t)
         (inhibit-point-motion-hooks t)
-        bface eface date-pos)
-    (when (and date (not (string= date "")))
-      (save-excursion
-       (save-restriction
-         (article-narrow-to-head)
-         (when (or (and (eq type 'lapsed)
-                        gnus-article-date-lapsed-new-header
-                        ;; Attempt to get the face of X-Sent first.
-                        (re-search-forward "^X-Sent:[ \t]" nil t))
-                   (re-search-forward "^Date:[ \t]" nil t)
-                   ;; If Date is missing, try again for X-Sent.
-                   (re-search-forward "^X-Sent:[ \t]" nil t))
+        pos date bface eface)
+    (save-excursion
+      (save-restriction
+       (widen)
+       (goto-char (point-min))
+       (while (and (or (setq date (get-text-property (setq pos (point))
+                                                     'original-date))
+                       (and (setq pos (next-single-property-change
+                                       (point) 'original-date))
+                            (setq date (get-text-property pos
+                                                          'original-date))))
+                   (not (string-equal date "")))
+         (narrow-to-region
+          pos
+          (or (text-property-any pos (point-max) 'original-date nil)
+              (point-max)))
+         (goto-char (point-min))
+         (when (re-search-forward tdate-regexp nil t)
            (setq bface (get-text-property (point-at-bol) 'face)
-                 date (or (get-text-property (point-at-bol)
-                                             'original-date)
-                          date)
-                 eface (get-text-property (1- (point-at-eol))
-                                          'face)))
-         (let ((inhibit-read-only t))
-           ;; Delete any old X-Sent headers.
-           (when (setq date-pos
-                       (text-property-any (point-min) (point-max)
-                                          'article-date-lapsed t))
-             (goto-char (setq date-pos (set-marker (make-marker) date-pos)))
-             (delete-region (match-beginning 0)
-                            (progn (forward-line 1) (point))))
-           (goto-char (point-min))
-           ;; Delete any old Date headers.
-           (while (re-search-forward "^Date:[ \t]" nil t)
-             (unless date-pos
-               (setq date-pos (match-beginning 0)))
-             (unless (and (eq type 'lapsed)
-                          gnus-article-date-lapsed-new-header)
-               (delete-region (match-beginning 0)
-                              (progn (message-next-header) (point)))))
-           (if date-pos
-               (progn
-                 (goto-char date-pos)
-                 (unless (bolp)
-                   ;; Possibly, Date has been deleted.
-                   (insert "\n"))
-                 (when (and (eq type 'lapsed)
-                            gnus-article-date-lapsed-new-header
-                            (looking-at "Date:"))
-                   (forward-line 1)))
-             (goto-char (point-min)))
-           (insert (article-make-date-line date type))
-           (when (eq type 'lapsed)
-             (put-text-property (point-at-bol) (point)
-                                'article-date-lapsed t))
+                 eface (get-text-property (1- (point-at-eol)) 'face)))
+         (goto-char (point-min))
+         (setq pos nil)
+         ;; Delete any old Date headers.
+         (while (re-search-forward date-regexp nil t)
+           (if pos
+               (delete-region (point-at-bol) (progn
+                                               (gnus-article-forward-header)
+                                               (point)))
+             (delete-region (point-at-bol) (progn
+                                             (gnus-article-forward-header)
+                                             (forward-char -1)
+                                             (point)))
+             (setq pos (point))))
+         (when (and (not pos)
+                    (re-search-forward tdate-regexp nil t))
+           (forward-line 1))
+         (gnus-goto-char pos)
+         (insert (article-make-date-line date (or type 'ut)))
+         (unless pos
            (insert "\n")
-           (forward-line -1)
-           ;; Do highlighting.
-           (when (looking-at "\\([^:]+\\): *\\(.*\\)$")
-             (add-text-properties (match-beginning 1) (1+ (match-end 1))
-                                  (list 'original-date date 'face bface))
-             (put-text-property (match-beginning 2) (match-end 2)
-                                'face eface))))))))
+           (forward-line -1))
+         ;; Do highlighting.
+         (beginning-of-line)
+         (when (looking-at "\\([^:]+\\): *\\(.*\\)$")
+           (put-text-property (match-beginning 1) (1+ (match-end 1))
+                              'face bface)
+           (put-text-property (match-beginning 2) (match-end 2)
+                              'face eface))
+         (put-text-property (point-min) (1- (point-max)) 'original-date date)
+         (goto-char (point-max))
+         (widen))))))
 
 (defun article-make-date-line (date type)
   "Return a DATE line of TYPE."
@@ -3266,6 +3257,22 @@ This format is defined by the `gnus-article-time-format' variable."
   (interactive (list t))
   (article-date-ut 'iso8601 highlight))
 
+(defun gnus-article-save-original-date ()
+  "Save the original date as a text property."
+  ;;(goto-char (point-max))
+  (skip-chars-backward "\n")
+  (let (start
+       (end (point))
+       (case-fold-search t))
+    (goto-char (point-min))
+    (when (and (re-search-forward "^date:[\t\n ]+" nil t)
+              (progn
+                (setq start (match-end 0))
+                (re-search-forward "[\t ]*\n\\(?:[^\t ]\\|\\'\\)" nil t)))
+      (put-text-property
+       (point-min) end 'original-date
+       (buffer-substring-no-properties start (match-beginning 0))))))
+
 ;; (defun article-show-all ()
 ;;   "Show all hidden text in the article buffer."
 ;;   (interactive)
@@ -4204,6 +4211,7 @@ If ALL-HEADERS is non-nil, no headers are hidden."
                        (if (search-forward "\n\n" nil t)
                            (point)
                          (point-max)))
+      (gnus-article-save-original-date)
       (gnus-treat-article 'head)
       (put-text-property (point-min) (point-max) 'article-treated-header t)
       (goto-char (point-max)))
@@ -4299,6 +4307,7 @@ If ALL-HEADERS is non-nil, no headers are hidden."
                          (if (search-forward "\n\n" nil t)
                              (point)
                            (point-max)))
+       (gnus-article-save-original-date)
        (gnus-treat-article 'head)
        (put-text-property (point-min) (point-max) 'article-treated-header t)
        (goto-char (point-max))
@@ -5058,6 +5067,7 @@ N is the numerical prefix."
            (save-restriction
              (article-goto-body)
              (narrow-to-region (point-min) (point))
+             (gnus-article-save-original-date)
              (gnus-treat-article 'head))))))))
 
 (defcustom gnus-mime-display-multipart-as-mixed nil