Bugfixes

Updates to tree-edit.el
Better selection of charset for texts in Gnu Emacs
Limit number of overlays in buffer
Fixed default value when prompting for text numbers
Fixed text-no strategy for kom-private-answer-previous

src/ChangeLog

+2002-07-23  David Byers  <david.byers@swipnet.se>
+
+	* lyskom-rest.el (lyskom-limited-make-overlay): New function
+	limits the number of overlays created.
+	(lyskom-special-insert-overlay): Use it.
+	(lyskom-format-insert-overlays): Use it.
+
+	* vars.el.in (kom-max-overlays): New variable.
+	(lyskom-overlay-pool): New variable.
+
+2002-07-22  David Byers  <david.byers@swipnet.se>
+
+	* mime.el (lyskom-mime-string-charset): Smarter selection of
+	coding system for Gnu Emacs. We still use our list whenever
+	possible, but if we can't find a coding system, we fall back on
+	Emacs' list of coding systems. Not done for XEmacs (yet).
+
+	* utilities.el (lyskom-read-text-no-prefix-arg): Prompt only after
+	computing a suitable default. That way we get a default value in
+	the prompt (which is a good thing).
+
+2002-07-21  David Byers  <david.byers@swipnet.se>
+
+	* edit-text.el (lyskom-edit-send-check-recipients): Support
+	recipient type in send-comments-to.
+
+2002-07-20  David Byers  <david.byers@swipnet.se>
+
+	* english-strings.el,swedish-strings.el: Add "Mozilla" in all
+	places where we say "Netscape".
+
+	* vars.el.in (kom-netscape-command): Clarify that mozilla and
+	netscape use the same settings.
+	(kom-url-managers): Say "Mozilla" in netscape manager.
+
+2002-07-18  David Byers  <david.byers@swipnet.se>
+
+	* tree-edit.el (tree-edit-compute-prefix): Made nonrecursive.
+	(tree-edit-compute-prefix-internal): Removed.
+	(tree-edit-adjust-markers): Made nonrecursive.
+	(tree-edit-draw): Made nonrecursive.
+
+	* vars.el.in (lyskom-text-buttons): Eliminate brackets and semis
+	at end of URLs.
+
+	* utilities.el (lyskom-pick-text-no-strategy-alist): Correct
+	strategy for kom-private-answer-previous.
+
+2002-06-30  David Byers  <david.byers@swipnet.se>
+
+	Temporary fix:
+	* commands1.el (lyskom-list-pers-print): Allocate five characters
+	for person numbers.
+	(lyskom-list-created-conferences-2): Same.
+	(kom-list-re): Same.
+
 2002-07-16  Johan Sundström  <jhs@lysator.liu.se>
 
 	* lyskom-rest.el (kom-go-to-next-conf): Treat prefix arguments as

src/commands1.el

@@ -1653,7 +1653,7 @@ Those that you are not a member in will be marked with an asterisk."
 
 (defun lyskom-list-pers-print (conf-z)
   "Print name of the person CONF-NO for kom-list-persons."
-  (lyskom-format-insert "%[%#1@%4#2:p %#2P%]\n"
+  (lyskom-format-insert "%[%#1@%5#2:p %#2P%]\n"
 			(lyskom-default-button 'pers (conf-z-info->conf-no conf-z))
 			conf-z))
 
@@ -1760,7 +1760,7 @@ Those that you are not a member in will be marked with an asterisk."
 					(conf-stat->supervisor cs)
 					(conf-stat->super-conf cs))))
       (aset counter 3 (1+ (elt counter 3)))
-      (lyskom-format-insert "%[%#1@%4#2:m %#3c %4#4s %#5s %#2M%]\n"
+      (lyskom-format-insert "%[%#1@%5#2:m %#3c %4#4s %#5s %#2M%]\n"
                             (lyskom-default-button 'conf (conf-stat->conf-no cs))
                             cs
                             (lyskom-list-conf-membership-char (conf-stat->conf-no cs))
@@ -1864,7 +1864,7 @@ be converted so that the search is case sensitive."
         (if (conf-z-info-list->conf-z-infos conf-list)
             (lyskom-traverse czi (conf-z-info-list->conf-z-infos conf-list)
               (lyskom-format-insert
-               "%[%#1@%4#2:m %#3c %#2:M%]\n"
+               "%[%#1@%5#2:m %#3c %#2:M%]\n"
                (lyskom-default-button
                 'conf (conf-z-info->conf-no czi))
                czi
@@ -2906,7 +2906,7 @@ Uses Protocol A version 8 calls"
 	     format-string-2
 	     ""
 	     (lyskom-return-username who-info)
-	     (concat "(" (who-info->doing-what who-info) ")"))))
+	     (concat "(" (string-replace-match "\n" (who-info->doing-what who-info) " ") ")"))))
       (setq who-list (cdr who-list)))
       
       (lyskom-insert (concat (make-string (- (lyskom-window-width) 1) ?-)
@@ -3036,7 +3036,7 @@ Uses Protocol A version 9 calls"
 	       format-string-2
 	       ""
 	       username
-	       (concat "(" (dynamic-session-info->what-am-i-doing who-info)
+	       (concat "(" (string-replace-match "\n" (dynamic-session-info->what-am-i-doing who-info) " ")
 		       ")"))))
 	(if kom-show-since-and-when
 	    (let ((active 
@@ -3459,6 +3459,8 @@ WHO-INFOS that are potential sessions."
 					   (who-info->doing-what info))
 			     (match-string 1 (who-info->doing-what info))
 			   (who-info->doing-what info))))
+             (when (string-match "\n" string)
+               (string-replace-match "\n" string " "))
 	     (if (string= string "")
 		 (lyskom-get-string 'unknown-doing-what)
 	       string))
@@ -3506,6 +3508,8 @@ WHO-INFOS that are potential sessions."
 			       (match-string
 				1 (dynamic-session-info->what-am-i-doing info))
 			     (dynamic-session-info->what-am-i-doing info))))
+               (when (string-match "\n" string)
+                 (string-replace-match "\n" string " "))
 	       (if (string= string "")
 		   (lyskom-get-string 'unknown-doing-what)
 		 string))

src/compatibility.el

@@ -343,6 +343,8 @@ string to search in."
 (lyskom-provide-function decode-coding-string (str coding-system) (copy-sequence str))
 (lyskom-provide-function string-bytes (str) (length str))
 (lyskom-provide-function check-coding-system (name) (error "No such coding system"))
+(lyskom-provide-function find-coding-systems-for-charsets (cs) nil)
+(lyskom-provide-function coding-system-get (cs prop) nil)
 (lyskom-provide-function string-width (str) (length str))
 (lyskom-provide-function char-width (c) 1)
 (lyskom-provide-function find-charset-string (str) '(ascii))

src/edit-text.el

@@ -899,7 +899,7 @@ Cannot be called from a callback."
                                'conf-stat->conf-no))
 
         ;;
-        ;; Filter the list. Remote all authors that are direct recipients
+        ;; Filter the list. Remove all authors that are direct recipients
         ;; or whose send-comments-to is a direct recipient or who are
         ;; listed in kom-dont-check-commented-authors
         ;;
@@ -907,14 +907,21 @@ Cannot be called from a callback."
         (lyskom-traverse author raw-author-list
           (let ((send-comments-to
                  (car (lyskom-get-aux-item (conf-stat->aux-items author) 33))))
-            (if (and send-comments-to
-                     (string-match "^\\([0-9]+\\)"
-                                   (aux-item->data send-comments-to)))
-                (setq send-comments-to
-                      (string-to-number
-                       (match-string 1 (aux-item->data send-comments-to))))
-              (setq send-comments-to nil))
 
+            (when send-comments-to
+              (cond ((string-match "^\\([0-9]+\\)\\s-+\\([0-9]+\\)" (aux-item->data send-comments-to))
+                     (setq send-comments-to 
+                           (cons (string-to-number
+                                  (match-string 1 (aux-item->data send-comments-to)))
+                                 (string-to-number
+                                  (match-string 2 (aux-item->data send-comments-to))))))
+                    ((string-match "^\\([0-9]+\\)"
+                                   (aux-item->data send-comments-to))
+                     (setq send-comments-to
+                           (cons (string-to-number
+                                  (match-string 1 (aux-item->data send-comments-to)))
+                                 0)))
+                    (t (setq send-comments-to nil))))
 
             (cond
 
@@ -929,7 +936,7 @@ Cannot be called from a callback."
 
              ;; Author has a zero send-comments-to
 
-             ((and send-comments-to (zerop send-comments-to)))
+             ((and send-comments-to (zerop (car send-comments-to))))
 
              ;; We don't have permission to send stuff to the author's
              ;; send-comments-to or to the author if there is no
@@ -937,7 +944,7 @@ Cannot be called from a callback."
 
              ((or (and send-comments-to
                        (not (lyskom-is-permitted-author
-                             (blocking-do 'get-conf-stat send-comments-to))))
+                             (blocking-do 'get-conf-stat (car send-comments-to)))))
                   (and (not send-comments-to)
                        (not (lyskom-is-permitted-author author)))))
 
@@ -986,29 +993,40 @@ Cannot be called from a callback."
         (lyskom-traverse author authors-to-ask-about
           (let ((send-comments-to
                  (car (lyskom-get-aux-item (conf-stat->aux-items author) 33))))
-            (if (and send-comments-to
-                     (string-match "^\\([0-9]+\\)"
-                                   (aux-item->data send-comments-to)))
-                (setq send-comments-to
-                      (string-to-number
-                       (match-string 1 (aux-item->data send-comments-to))))
-              (setq send-comments-to nil))
+            (when send-comments-to
+              (cond ((string-match "^\\([0-9]+\\)\\s-+\\([0-9]+\\)" (aux-item->data send-comments-to))
+                     (setq send-comments-to 
+                           (cons (string-to-number
+                                  (match-string 1 (aux-item->data send-comments-to)))
+                                 (string-to-number
+                                  (match-string 2 (aux-item->data send-comments-to))))))
+                    ((string-match "^\\([0-9]+\\)"
+                                   (aux-item->data send-comments-to))
+                     (setq send-comments-to
+                           (cons (string-to-number
+                                  (match-string 1 (aux-item->data send-comments-to)))
+                                 0)))
+                    (t (setq send-comments-to nil))))
 
             (when (lyskom-j-or-n-p 
                    (lyskom-format 'add-recipient-p 
                                   author
-                                  send-comments-to))
+                                  (car send-comments-to)))
               (setq extra-headers
-                    (nconc (list (if (lyskom-j-or-n-p
-                                      (lyskom-format
-                                       'really-add-as-recpt-q
-                                       (or send-comments-to author)))
-                                     'RECPT
-                                   'CC-RECPT)
-                                 (or send-comments-to 
-                                     (conf-stat->conf-no author)))
-                           extra-headers)))))))
-
+                    (nconc
+                     (list
+                      (cond ((and send-comments-to
+                                  (eq (cdr send-comments-to) 0)) 'RECPT)
+                            ((and send-comments-to
+                                  (eq (cdr send-comments-to) 1)) 'CC-RECPT)
+                            ((and send-comments-to
+                                  (eq (cdr send-comments-to) 15)) 'BCC-RECPT)
+                            (t (if (lyskom-j-or-n-p
+                                    (lyskom-format 'really-add-as-recpt-q author))
+                                   'RECPT
+                                 'CC-RECPT)))
+                            (conf-stat->conf-no author))
+                     extra-headers)))))))
     extra-headers))
     
 (defun lyskom-send-enriched (message)

src/english-strings.el

@@ -1794,6 +1794,7 @@ have been removed, you can fix the problem by giving the command
 
     (keyboard-cancel . "Cancel")
     (keyboard-menu-help . "(choose: C-n, C-p; confirm: RET)")
+    (customize-help . "See the beginning of the buffer for more information")
     ))
 
 
@@ -1902,7 +1903,7 @@ have been removed, you can fix the problem by giving the command
     (kom-review-all-marked-texts . "Review all marked (texts)")
     (kom-add-recipient        . "Add recipient")
     (kom-add-copy             . "Add (recipient of) carbon copy")
-    (kom-add-bcc	      . "Addera (recipient of) blind carbon copy")
+    (kom-add-bcc	      . "Add (recipient of) blind carbon copy")
     (kom-sub-recipient        . "Remove recipient")
     (kom-move-text            . "Move text")
     (kom-move-text-tree       . "Move tree")
@@ -2632,8 +2633,8 @@ Select whether to execute command or keyboard macro.")
     (viewer-program . "Web browser")
     (no-viewer            . "(ingenting valt)")
     (default-viewer       . "Browse-URL (all)")
-    (netscape-viewer . "Netscape Navigator (all)")
-    (windows-viewer       . "Windows default or Netscape (all)")
+    (netscape-viewer . "Netscape/Mozilla (all)")
+    (windows-viewer       . "Windows default or Netscape/Mozilla (all)")
     (emacs-w3-viewer . "Emacs W3 mode (HTTP, Goper, FTP)")
     (emacs-general-viewer . "Emacs (FTP, Telnet, Mail)")
     (emacs-dired-viewer . "Emacs Dired (FTP)")
@@ -3280,7 +3281,7 @@ be saved in the server. Otherwise it will be saved in your .emacs.")
   This setting specifies the command to use to start NCSA Mosaic.")
 
     (kom-netscape-command-doc . "\
-  This setting specifies the command to use to start Netscape.")
+  This setting specifies the command to use to start Netscape or Mozilla.")
 
     (kom-galeon-command-doc . "\
   This setting specifies the command to use to start Galeon.")
@@ -3686,7 +3687,7 @@ be saved in the server. Otherwise it will be saved in your .emacs.")
     (kom-url-viewer-preferences-tag . "Open URLs using the following program:")
     (kom-windows-browser-command-tag . "Command to start a web browser on Windows:")
     (kom-mosaic-command-tag . "Command to start NCSA Mosaic:")
-    (kom-netscape-command-tag . "Command to start Netscape Navigator:")
+    (kom-netscape-command-tag . "Command to start Netscape/Mozilla:")
     (kom-galeon-command-tag . "Command to start Galeon:")
 
     (kom-symbolic-marks-alist-tag . "Symbolic mark types:")

src/lyskom-rest.el

@@ -1178,14 +1178,29 @@ Args: FORMAT-STRING &rest ARGS"
                            result))
     result))
 
+(defun lyskom-limited-make-overlay (start end)
+  (let ((val (lyskom-xemacs-or-gnu
+              (make-extent start end)
+              (make-overlay start end))))
+  (when (lyskom-plusp kom-max-overlays)
+    (let ((old (nthcdr (1- kom-max-overlays) lyskom-overlay-pool))) ;
+      (setq lyskom-overlay-pool 
+            (lyskom-nbutlast lyskom-overlay-pool 
+                             (- (length lyskom-overlay-pool)
+                                kom-max-overlays)))
+      (mapcar 'delete-overlay old))
+    (setq lyskom-overlay-pool (cons val lyskom-overlay-pool)))
+  val))
+
+
 (defun lyskom-special-insert-overlay (start end args)
   (lyskom-xemacs-or-gnu
-   (let ((overlay (make-extent start end)))
+   (let ((overlay (lyskom-limited-make-overlay start end)))
      (while args
        (set-extent-property overlay (car args) (car (cdr args)))
        (setq args (nthcdr 2 args)))
      (set-extent-priority overlay 1000))
-   (let ((overlay (make-overlay start end)))
+   (let ((overlay (lyskom-limited-make-overlay start end)))
      (while args
        (overlay-put overlay (car args) (car (cdr args)))
        (setq args (nthcdr 2 args))))))
@@ -1197,15 +1212,15 @@ Args: FORMAT-STRING &rest ARGS"
   "Insert delayed overlays according to FORMAT-STATE."
   (lyskom-traverse overlay (format-state->delayed-overlays format-state)
     (lyskom-xemacs-or-gnu
-     (let ((overlay (make-extent (+ start (aref overlay 0))
-                                 (+ start (aref overlay 1))))
+     (let ((overlay (lyskom-limited-make-overlay (+ start (aref overlay 0))
+                                                 (+ start (aref overlay 1))))
            (args (aref overlay 2)))
        (while args
          (set-extent-property overlay (car args) (car (cdr args)))
          (setq args (nthcdr 2 args)))
        (set-extent-priority overlay 1000))
-     (let ((overlay (make-overlay (+ start (aref overlay 0))
-                                  (+ start (aref overlay 1))))
+     (let ((overlay (lyskom-limited-make-overlay (+ start (aref overlay 0))
+                                                 (+ start (aref overlay 1))))
            (args (aref overlay 2)))
        (while args
          (overlay-put overlay (car args) (car (cdr args)))

src/mime.el

@@ -66,14 +66,23 @@
 
 
 (defun lyskom-mime-string-charset (data)
-  (let ((cs (find-charset-string data))
-        (tmp lyskom-charset-alist)
-        (system lyskom-server-coding-system))
-    (while (and tmp cs)
-      (if (lyskom-subset-p cs (car (car tmp)))
-          (setq system (cdr (car tmp)) tmp nil)
-        (setq tmp (cdr tmp))))
-    system))
+  (let* ((cs (find-charset-string data))
+         (tmp lyskom-charset-alist)
+         (best-guess (let ((system nil))
+                       (while (and tmp cs)
+                         (if (lyskom-subset-p cs (car (car tmp)))
+                             (setq system (cdr (car tmp)) tmp nil)
+                           (setq tmp (cdr tmp))))
+                       system)))
+    (or
+     best-guess
+     (lyskom-xemacs-or-gnu
+      lyskom-server-coding-system
+      (let ((coding (find-coding-systems-for-charsets cs)))
+        (while (null (coding-system-get (car coding) 'mime-charset))
+          (setq coding (cdr coding)))
+        (coding-system-get (car coding) 'mime-charset)))
+    lyskom-server-coding-system)))
 
 (defun lyskom-mime-charset-coding-system (charset)
   (condition-case nil

src/parse.el

@@ -1229,7 +1229,8 @@ functions and variables that are connected with the lyskom-buffer."
                (signal 'lyskom-protocol-error err))
               (lyskom-parse-incomplete (signal (car err) (cdr err)))
               (error (delete-region (point-min) lyskom-parse-pos)
-                     (signal (car err) (cdr err))))
+                     (signal (car err) (cdr err)))
+)
             (goto-char (point-min))
             (if (looking-at "[ \n]+")
                 (delete-region (match-beginning 0) (match-end 0)))

src/swedish-strings.el

@@ -1806,6 +1806,7 @@ kommandot \"Spara variabler\".\n\n")
 
     (keyboard-cancel . "Avbryt")
     (keyboard-menu-help . "(vlj: C-n, C-p; bekrfta: RET)")
+    (customize-help . "Se brjan av bufferten fr mer information")
     ))
 
 (lyskom-language-var local lyskom-month-names sv
@@ -2684,8 +2685,8 @@ kommandot \"Spara variabler\".\n\n")
     (viewer-program . "WWW-lsare")
     (no-viewer            . "(ingenting valt)")
     (default-viewer       . "Browse-URL (alla)")
-    (netscape-viewer      . "Netscape Navigator (alla)")
-    (windows-viewer       . "Windows standard eller Netscape (alla)")
+    (netscape-viewer      . "Netscape/Mozilla (alla)")
+    (windows-viewer       . "Windows standard eller Netscape/Mozilla (alla)")
     (emacs-w3-viewer      . "Emacs W3-mode (HTTP, Goper, FTP)")
     (emacs-general-viewer . "Emacs (FTP, Telnet, Mail)")
     (emacs-dired-viewer   . "Emacs Dired (FTP)")
@@ -3342,7 +3343,7 @@ i servern. Annars sparas det i din .emacs.")
   Mosaic.")
 
     (kom-netscape-command-doc . "\
-  Denna instllning anger kommandot fr att kra Netscape.")
+  Denna instllning anger kommandot fr att kra Netscape eller Mozilla.")
 
     (kom-galeon-command-doc . "\
   Denna instllning anger kommandot fr att kra Galeon.")
@@ -3746,7 +3747,7 @@ i servern. Annars sparas det i din .emacs.")
     (kom-url-viewer-preferences-tag . "ppna URLer med fljande program:")
     (kom-windows-browser-command-tag . "Kommando fr att starta en WWW-lsare i Windows:")
     (kom-mosaic-command-tag . "Kommando fr att starta NCSA Mosaic:")
-    (kom-netscape-command-tag . "Kommando fr att starta Netscape Navigator:")
+    (kom-netscape-command-tag . "Kommando fr att starta Netscape eller Mozilla:")
     (kom-galeon-command-tag . "Kommando fr att starta Galeon:")
 
     (kom-symbolic-marks-alist-tag . "Symboliska markeringstyper:")

src/tree-edit.el

@@ -39,25 +39,132 @@
 ;;;;
 ;;;; TODO
 ;;;;
+;;;; Cache hanging-indent-strings 'cos it'll be expensive to do
+;;;; make-string so many times.
+;;;;
+;;;; Compile tree styles?
+;;;;
+;;;; Have a link from each child to the root, and store tree
+;;;; style in the root (or perhaps let tree-get-property 
+;;;; traverse the parent links so we can do inherited 
+;;;; properties).
+;;;;
+;;;; Make it possible to collapse all but the first line of a
+;;;; multiline item (with minimal redrawing, please).
+;;;;
+;;;; Optimize drawing a bit. Right now, if we attach a node, we
+;;;; redraw the parent (and therefore all the children). This is
+;;;; easy, but some trees are really deep (we hit max-specpdl-size
+;;;; in one example), so doing this is needlessly expensive.
+;;;;
+;;;; Allow us to set a prefix length for the entire tree and have
+;;;; prefixes to the items. These are text snippets to display to
+;;;; the far left of the tree.
+;;;;
+;;;; Make it possible to collapse the parent of a node. Doing this
+;;;; means that we don't display the entire path to the node, just
+;;;; a marker saying that this node is underneath something else.
+;;;;
+;;;; Implement incremental computation of children, so that we can
+;;;; set the prune attribute of a node and register a callback to
+;;;; compute children of the node.
+;;;;
+;;;; Implement incremental computation of parent nodes.
+;;;;
 ;;;; Document tree node properties
-;;;; - prune
-;;;; - leaf
+;;;; - prune (don't draw the subtree)
+;;;; - leaf (don't allow move-up and friends to attach a subtree)
+;;;; - hanging-indent (hanging indent of multiline items, string or int)
 ;;;;
 
 
-(defvar tree-edit-indent-level 3
-  "*Number of characters to indent each level in the tree editor.")
-
-(defvar tree-edit-indent-a (concat "|" (make-string (1- tree-edit-indent-level) ?\ )))
-(defvar tree-edit-indent-b (make-string tree-edit-indent-level ?\ ))
-(defvar tree-edit-item-header (concat "+"
-                                      (make-string 
-                                       (- tree-edit-indent-level 2) ?-)
-                                      " "))
 (defvar tree-edit-kill-buffer nil
   "Buffer containing the most recently killed tree.")
 
 
+;;; ============================================================
+;;; Drawing styles
+
+(defvar tree-edit-current-style 'compact)
+(defvar tree-edit-styles
+  '((default . ((indent-a . "|  ")
+                (indent-b . "   ")
+                (before-children . "|\n")
+                (after-children . "\n")
+                (item-header . tree-edit-item-header)
+                (last-item-header . tree-edit-last-item-header)))
+
+    (compact . ((indent-a . "|  ")
+                (indent-b . "   ")
+                (before-children . nil)
+                (after-children . nil)
+                (item-header . tree-edit-item-header)
+                (last-item-header . tree-edit-last-item-header)))
+
+    (semi-compact . ((indent-a . "|  ")
+                     (indent-b . "   ")
+                     (before-children . nil)
+                     (after-children . "\n")
+                     (item-header . tree-edit-item-header)
+                     (last-item-header . tree-edit-last-item-header)))
+
+    (very-compact . ((indent-a . "|")
+                     (indent-b . " ")
+                     (before-children . nil)
+                     (after-children . nil)
+                     (item-header . "+")
+                     (last-item-header . "`")))
+    "Definitions of tree styles.
+Each item in this list is a definition of a tree style. A 
+definition is a cons whose car is the name of the style (a 
+symbol) and the cdr is an alist specifying the style.
+
+The following keys must be present in the alist defining the
+style:
+
+indent-a        The string to print to the right of items
+                that is used to connect children of a node,
+                when there are additional children at this
+                level. Normally a vertical bar and some
+                whitespace.
+
+indent-b        The string to print to the right of items
+                to indent them when there are no additional
+                children at this level. Normally some 
+                whitespace.
+
+before-children The string to print before the first child of
+                a node. This string will be prefixed as the 
+                parent node.
+
+after-children  The string to print after the last child of
+                a node. This string will be prefixed as the 
+                parent node.
+
+item-header     The header of an item. Normally this connects
+                the indent-a printed on the prevous line with
+                the current item and the indent-a below.
+
+last-item-header   The header used for the last child of a 
+                node. This item usually connects the indent-a
+                printed on the previous line with the indent-b
+                printed on the next line.
+
+IMPORTANT: The lenghts of indent-a, indent-b and last-item-header
+           must be the same for all nodes at the same level in
+           the tree.
+
+The cdrs of each item in the defining alist is either a string;
+the name of a function (a symbol) that returns a string or nil; 
+or nil (in which case nothing is printed).
+"
+    ))
+
+(defun tree-edit-get-style-data (item &optional style)
+  (cdr (assq item (cdr (assq (or style tree-edit-current-style)
+                             tree-edit-styles)))))
+
+
 ;;; ============================================================
 ;;; Error symbols
 
@@ -195,44 +302,79 @@ If there is no property PROPERTY for NODE, return DEFAULT."
 ;;; Basic drawing
 
 
+(defun tree-edit-insert-part (part tree prefix)
+  (let ((fn (tree-edit-get-style-data part)))
+    (cond ((functionp fn) (setq fn (funcall fn tree)))
+          ((and (symbolp fn) (boundp fn)) 
+           (setq fn (symbol-value fn))))
+    (cond ((null fn))
+          ((stringp fn) 
+           (insert (tree-edit-prefix-string prefix))
+           (insert fn)))))
+
 (defun tree-edit-prefix-string (prefix)
   "Return a string of spaces and bars according to values in PREFIX.
 Used to draw the spaces and bars before a tree entry. Any strings
 in PREFIX are included verbatim."
   (apply 'concat (mapcar (lambda (x) 
                            (cond ((stringp x) x)
-                                 (x tree-edit-indent-a)
-                                 (t tree-edit-indent-b))) prefix)))
+                                 (x (tree-edit-get-style-data 'indent-a))
+                                 (t (tree-edit-get-style-data 'indent-b)))) 
+                         prefix)))
 
 (defun tree-edit-compute-prefix (tree)
   "Compute the prefix for subtree TREE.
 Returns a list of nil and non-nil values specifying where to draw
 vertical lines and where to not draw vertical lines."
-  (when tree
-    (nreverse (tree-edit-compute-prefix-internal (tree-node->parent tree)))))
+  (let ((result nil)
+        (tree (tree-node->parent tree)))
+    (while tree
+      (setq result (cons (tree-node-next-sibling tree) result))
+      (setq tree (tree-node->parent tree)))
+    result))
 
-(defun tree-edit-compute-prefix-internal (tree)
-  "Compute the prefix for TREE.
-Returns a list of non-nil and nil that specifies the indentation for
-TREE when drawn in the buffer."
-  (when tree
-    (cons (tree-node-next-sibling tree)
-          (tree-edit-compute-prefix-internal (tree-node->parent tree)))))
+(defun tree-edit-adjust-markers (tree)
+  (while (and tree
+              (tree-node->end tree)
+              (tree-node->children tree))
+    (let ((kids (tree-node->children tree)))
+      (while kids
+        (when (and (tree-node->end (car kids))
+                   (> (tree-node->end (car kids))
+                      (tree-node->end tree)))
+          (set-marker (tree-node->end tree)