2000-12-20 09:00:00 ShengHuo ZHU <zsh@cs.rochester.edu>
[gnus] / lisp / gnus-topic.el
index eb0f219..30ac8fa 100644 (file)
@@ -192,8 +192,9 @@ If TOPIC, start with that topic."
     (beginning-of-line)
     (get-text-property (point) 'gnus-active)))
 
-(defun gnus-topic-find-groups (topic &optional level all lowest)
-  "Return entries for all visible groups in TOPIC."
+(defun gnus-topic-find-groups (topic &optional level all lowest recursive)
+  "Return entries for all visible groups in TOPIC.
+If RECURSIVE is t, return groups in its subtopics too."
   (let ((groups (cdr (assoc topic gnus-topic-alist)))
         info clevel unread group params visible-groups entry active)
     (setq lowest (or lowest 1))
@@ -231,7 +232,18 @@ If TOPIC, start with that topic."
           (cdr (assq 'visible params)))
        ;; Add this group to the list of visible groups.
        (push (or entry group) visible-groups)))
-    (nreverse visible-groups)))
+    (setq visible-groups (nreverse visible-groups))
+    (when recursive 
+      (if (eq recursive t)
+         (setq recursive (cdr (gnus-topic-find-topology topic))))
+      (mapcar (lambda (topic-topology)
+               (setq visible-groups 
+                     (nconc visible-groups 
+                            (gnus-topic-find-groups
+                             (caar topic-topology) 
+                             level all lowest topic-topology))))
+             (cdr recursive)))
+    visible-groups))
 
 (defun gnus-topic-previous-topic (topic)
   "Return the previous topic on the same level as TOPIC."
@@ -372,15 +384,19 @@ If TOPIC, start with that topic."
 
 ;;; Generating group buffers
 
-(defun gnus-group-prepare-topics (level &optional all lowest
+(defun gnus-group-prepare-topics (level &optional predicate lowest
                                        regexp list-topic topic-level)
   "List all newsgroups with unread articles of level LEVEL or lower.
 Use the `gnus-group-topics' to sort the groups.
-If ALL is non-nil, list groups that have no unread articles.
+If PREDICTE is a function, list groups that the function returns non-nil;
+if it is t, list groups that have no unread articles.
 If LOWEST is non-nil, list all newsgroups of level LOWEST or higher."
   (set-buffer gnus-group-buffer)
   (let ((buffer-read-only nil)
-        (lowest (or lowest 1)))
+        (lowest (or lowest 1))
+       (not-in-list 
+        (and gnus-group-listed-groups
+             (copy-sequence gnus-group-listed-groups))))
 
     (when (or (not gnus-topic-alist)
              (not gnus-topology-checked-p))
@@ -390,48 +406,60 @@ If LOWEST is non-nil, list all newsgroups of level LOWEST or higher."
       (erase-buffer))
 
     ;; List dead groups?
-    (when (and (>= level gnus-level-zombie)
-              (<= lowest gnus-level-zombie))
+    (when (or gnus-group-listed-groups
+             (and (>= level gnus-level-zombie)
+                  (<= lowest gnus-level-zombie)))
       (gnus-group-prepare-flat-list-dead
        (setq gnus-zombie-list (sort gnus-zombie-list 'string<))
        gnus-level-zombie ?Z
        regexp))
 
-    (when (and (>= level gnus-level-killed) (<= lowest gnus-level-killed))
+    (when (or gnus-group-listed-groups
+              (and (>= level gnus-level-killed) 
+                   (<= lowest gnus-level-killed)))
       (gnus-group-prepare-flat-list-dead
-       (setq gnus-killed-list (sort gnus-killed-list 'string<))
+       (gnus-union
+       (and not-in-list 
+            (gnus-delete-if (lambda (group)
+                              (< (gnus-group-level group) gnus-level-killed))
+                            not-in-list))
+       (setq gnus-killed-list (sort gnus-killed-list 'string<)))
        gnus-level-killed ?K
        regexp))
 
     ;; Use topics.
     (prog1
-       (when (< lowest gnus-level-zombie)
+       (when (or (< lowest gnus-level-zombie)
+                 gnus-group-listed-groups)
          (if list-topic
              (let ((top (gnus-topic-find-topology list-topic)))
                (gnus-topic-prepare-topic (cdr top) (car top)
-                                         (or topic-level level) all
-                                         nil lowest))
+                                         (or topic-level level) predicate
+                                         nil lowest regexp))
            (gnus-topic-prepare-topic gnus-topic-topology 0
-                                     (or topic-level level) all
-                                     nil lowest)))
-
+                                     (or topic-level level) predicate
+                                     nil lowest regexp)))
       (gnus-group-set-mode-line)
-      (setq gnus-group-list-mode (cons level all))
+      (setq gnus-group-list-mode (cons level predicate))
       (gnus-run-hooks 'gnus-group-prepare-hook))))
 
-(defun gnus-topic-prepare-topic (topicl level &optional list-level all silent
-                                       lowest)
+(defun gnus-topic-prepare-topic (topicl level &optional list-level 
+                                       predicate silent
+                                       lowest regexp)
   "Insert TOPIC into the group buffer.
 If SILENT, don't insert anything.  Return the number of unread
 articles in the topic and its subtopics."
   (let* ((type (pop topicl))
         (entries (gnus-topic-find-groups
-                  (car type) list-level
-                  (or all
+                  (car type) 
+                  (if gnus-group-listed-groups 
+                      gnus-level-killed
+                    list-level)
+                  (or predicate gnus-group-listed-groups
                       (cdr (assq 'visible
                                  (gnus-topic-hierarchical-parameters
                                   (car type)))))
-                  lowest))
+                  (if gnus-group-listed-groups 0 lowest)))
         (visiblep (and (eq (nth 1 type) 'visible) (not silent)))
         (gnus-group-indentation
          (make-string (* gnus-topic-indent-level level) ? ))
@@ -446,32 +474,61 @@ articles in the topic and its subtopics."
     (while topicl
       (incf unread
            (gnus-topic-prepare-topic
-            (pop topicl) (1+ level) list-level all
-            (not visiblep) lowest)))
+            (pop topicl) (1+ level) list-level predicate
+            (not visiblep) lowest regexp)))
     (setq end (point))
     (goto-char beg)
     ;; Insert all the groups that belong in this topic.
     (while (setq entry (pop entries))
-      (when visiblep
-       (if (stringp entry)
-           ;; Dead groups.
-           (gnus-group-insert-group-line
-            entry (if (member entry gnus-zombie-list)
-                      gnus-level-zombie gnus-level-killed)
-            nil (- (1+ (cdr (setq active (gnus-active entry))))
-                   (car active))
-            nil)
-         ;; Living groups.
-         (when (setq info (nth 2 entry))
-           (gnus-group-insert-group-line
-            (gnus-info-group info)
-            (gnus-info-level info) (gnus-info-marks info)
-            (car entry) (gnus-info-method info)))))
-      (when (and (listp entry)
-                (numberp (car entry)))
-       (incf unread (car entry)))
-      (when (listp entry)
-       (setq tick t)))
+      (when (if (stringp entry)
+               (gnus-group-prepare-logic 
+                entry
+                (and
+                 (or (not gnus-group-listed-groups)
+                     (if (< list-level gnus-level-zombie) nil
+                       (let ((entry-level
+                              (if (member entry gnus-zombie-list)
+                                  gnus-level-zombie gnus-level-killed)))
+                         (and (<= entry-level list-level)
+                              (>= entry-level lowest)))))
+                 (cond 
+                  ((stringp regexp)
+                   (string-match regexp entry))
+                  ((functionp regexp)
+                   (funcall regexp entry))
+                  ((null regexp) t)
+                  (t nil))))
+             (setq info (nth 2 entry))
+             (gnus-group-prepare-logic 
+              (gnus-info-group info)
+              (and (or (not gnus-group-listed-groups)
+                       (let ((entry-level (gnus-info-level info)))
+                         (and (<= entry-level list-level)
+                              (>= entry-level lowest))))
+                   (or (not (functionp predicate))
+                       (funcall predicate info))
+                   (or (not (stringp regexp))
+                       (string-match regexp (gnus-info-group info))))))
+       (when visiblep
+         (if (stringp entry)
+             ;; Dead groups.
+             (gnus-group-insert-group-line
+              entry (if (member entry gnus-zombie-list)
+                        gnus-level-zombie gnus-level-killed)
+              nil (- (1+ (cdr (setq active (gnus-active entry))))
+                     (car active))
+              nil)
+           ;; Living groups.
+           (when (setq info (nth 2 entry))
+             (gnus-group-insert-group-line
+              (gnus-info-group info)
+              (gnus-info-level info) (gnus-info-marks info)
+              (car entry) (gnus-info-method info)))))
+       (when (and (listp entry)
+                  (numberp (car entry)))
+         (incf unread (car entry)))
+       (when (listp entry)
+         (setq tick t))))
     (goto-char beg)
     ;; Insert the topic line.
     (when (and (not silent)
@@ -505,7 +562,7 @@ articles in the topic and its subtopics."
       (let ((data (cadr (gnus-topic-find-topology topic))))
        (setcdr data
                (list (if insert 'visible 'invisible)
-                     hide
+                     (caddr data)
                      (cadddr data))))
       (if total-remove
          (setq gnus-topic-alist
@@ -1019,7 +1076,10 @@ articles in the topic and its subtopics."
       (when (gnus-visual-p 'topic-menu 'menu)
        (gnus-topic-make-menu-bar))
       (gnus-set-format 'topic t)
-      (gnus-add-minor-mode 'gnus-topic-mode " Topic" gnus-topic-mode-map)
+      (gnus-add-minor-mode 'gnus-topic-mode " Topic"
+                          gnus-topic-mode-map nil (lambda (&rest junk)
+                                                    (interactive)
+                                                    (gnus-topic-mode nil t)))
       (add-hook 'gnus-group-catchup-group-hook 'gnus-topic-update-topic)
       (set (make-local-variable 'gnus-group-prepare-function)
           'gnus-group-prepare-topics)
@@ -1045,8 +1105,7 @@ articles in the topic and its subtopics."
     ;; Remove topic infestation.
     (unless gnus-topic-mode
       (remove-hook 'gnus-summary-exit-hook 'gnus-topic-update-topic)
-      (remove-hook 'gnus-group-change-level-function
-                  'gnus-topic-change-level)
+      (setq gnus-group-change-level-function nil)
       (remove-hook 'gnus-check-bogus-groups-hook 'gnus-topic-clean-alist)
       (setq gnus-group-prepare-function 'gnus-group-prepare-flat)
       (setq gnus-group-sort-alist-function 'gnus-group-sort-flat))
@@ -1268,7 +1327,11 @@ If PERMANENT, make it stay hidden in subsequent sessions as well."
   (interactive "P")
   (when (gnus-current-topic)
     (gnus-topic-goto-topic (gnus-current-topic))
-    (setcar (cddr (assoc (gnus-current-topic) gnus-topic-topology)) 'hidden)
+    (if permanent
+       (setcar (cddr 
+                (cadr
+                 (gnus-topic-find-topology (gnus-current-topic))))
+               'hidden))
     (gnus-topic-remove-topic nil nil)))
 
 (defun gnus-topic-show-topic (&optional permanent)
@@ -1276,33 +1339,46 @@ If PERMANENT, make it stay hidden in subsequent sessions as well."
 If PERMANENT, make it stay shown in subsequent sessions as well."
   (interactive "P")
   (when (gnus-group-topic-p)
-    (setcar (cddr (assoc (gnus-current-topic) gnus-topic-topology)) nil)
-    (gnus-topic-remove-topic t nil)))
-
-(defun gnus-topic-mark-topic (topic &optional unmark)
-  "Mark all groups in the topic with the process mark."
-  (interactive (list (gnus-group-topic-name)))
+    (if (not permanent)
+       (gnus-topic-remove-topic t nil)
+      (let ((topic 
+            (gnus-topic-find-topology 
+             (completing-read "Show topic: " gnus-topic-alist nil t))))
+       (setcar (cddr (cadr topic)) nil)
+       (setcar (cdr (cadr topic)) 'visible)
+       (gnus-group-list-groups)))))
+
+(defun gnus-topic-mark-topic (topic &optional unmark recursive)
+  "Mark all groups in the TOPIC with the process mark.
+If RECURSIVE is t, mark its subtopics too."
+  (interactive (list (gnus-group-topic-name)
+                    nil
+                    (and current-prefix-arg t)))
   (if (not topic)
       (call-interactively 'gnus-group-mark-group)
     (save-excursion
-      (let ((groups (gnus-topic-find-groups topic gnus-level-killed t)))
+      (let ((groups (gnus-topic-find-groups topic gnus-level-killed t nil 
+                                           recursive)))
        (while groups
          (funcall (if unmark 'gnus-group-remove-mark 'gnus-group-set-mark)
                   (gnus-info-group (nth 2 (pop groups)))))))))
 
-(defun gnus-topic-unmark-topic (topic &optional unmark)
-  "Remove the process mark from all groups in the topic."
-  (interactive (list (gnus-group-topic-name)))
+(defun gnus-topic-unmark-topic (topic &optional dummy recursive)
+  "Remove the process mark from all groups in the TOPIC.
+If RECURSIVE is t, unmark its subtopics too."
+  (interactive (list (gnus-group-topic-name)
+                    nil
+                    (and current-prefix-arg t)))
   (if (not topic)
       (call-interactively 'gnus-group-unmark-group)
-    (gnus-topic-mark-topic topic t)))
+    (gnus-topic-mark-topic topic t recursive)))
 
 (defun gnus-topic-get-new-news-this-topic (&optional n)
   "Check for new news in the current topic."
   (interactive "P")
   (if (not (gnus-group-topic-p))
       (gnus-group-get-new-news-this-group n)
-    (gnus-topic-mark-topic (gnus-group-topic-name))
+    (gnus-topic-mark-topic (gnus-group-topic-name) nil (and n t))
     (gnus-group-get-new-news-this-group)))
 
 (defun gnus-topic-move-matching (regexp topic &optional copyp)