From 4d73090461577032bc822f23c2d7da0db7803097 Mon Sep 17 00:00:00 2001
From: morioka <morioka>
Date: Tue, 12 Jan 1999 15:09:25 +0000
Subject: [PATCH] (gnus-retrieve-parsed-headers): Add new optional arguments
 `dependencies' and `force-new'; new implementation; call
 `retrieve-parsed-headers' if it is found.

---
 lisp/gnus-int.el |   40 +++++++++++++++++++++++++++++++++-------
 1 file changed, 33 insertions(+), 7 deletions(-)

diff --git a/lisp/gnus-int.el b/lisp/gnus-int.el
index 4996a25..0abe781 100644
--- a/lisp/gnus-int.el
+++ b/lisp/gnus-int.el
@@ -284,15 +284,41 @@ If FETCH-OLD, retrieve all headers (or some subset thereof) in the group."
 	       articles (gnus-group-real-name group)
 	       (nth 1 gnus-command-method) fetch-old))))
 
-(defun gnus-retrieve-parsed-headers (articles group &optional fetch-old)
+(defun gnus-retrieve-parsed-headers (articles group &optional fetch-old
+					      dependencies force-new)
   "Request parsed-headers for ARTICLES in GROUP.
 If FETCH-OLD, retrieve all headers (or some subset thereof) in the group."
-  (if (eq (setq gnus-headers-retrieved-by
-		(gnus-retrieve-headers articles group fetch-old))
-	  'nov)
-      (gnus-get-newsgroup-headers-xover
-       articles nil nil gnus-newsgroup-name t)
-    (gnus-get-newsgroup-headers)))
+  (unless dependencies
+    (setq dependencies
+	  (save-excursion
+	    (set-buffer gnus-summary-buffer)
+	    gnus-newsgroup-dependencies)))
+  (let ((gnus-command-method (gnus-find-method-for-group group))
+	headers)
+    (if (and gnus-use-cache (numberp (car articles)))
+	(setq gnus-headers-retrieved-by
+	      (gnus-cache-retrieve-headers articles group fetch-old))
+      (let ((func (gnus-get-function gnus-command-method
+				     'retrieve-parsed-headers 'no-error)))
+	(if func
+	    (setq headers (funcall func articles dependencies
+				   (gnus-group-real-name group)
+				   (nth 1 gnus-command-method) fetch-old
+				   force-new)
+		  gnus-headers-retrieved-by (car headers)
+		  headers (cdr headers))
+	  (setq gnus-headers-retrieved-by
+		(funcall
+		 (gnus-get-function gnus-command-method 'retrieve-headers)
+		 articles (gnus-group-real-name group)
+		 (nth 1 gnus-command-method) fetch-old))
+	  )))
+    (or headers
+	(if (eq gnus-headers-retrieved-by 'nov)
+	    (gnus-get-newsgroup-headers-xover
+	     articles nil dependencies gnus-newsgroup-name t)
+	  (gnus-get-newsgroup-headers dependencies)))
+    ))
 
 (defun gnus-retrieve-articles (articles group)
   "Request ARTICLES in GROUP."
-- 
1.7.10.4