;;; ewoc.el --- utility to maintain a view of a list of objects in a buffer
-;; Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-;; 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+;; Copyright (C) 1991-2011 Free Software Foundation, Inc.
;; Author: Per Cederqvist <ceder@lysator.liu.se>
;; Inge Wallin <inge@lysator.liu.se>
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; dll (a doubly linked list) and the contents of a buffer.
;; Possible uses are dired (have all files in a list, and show them),
;; buffer-list, kom-prioritize (in the LysKOM elisp client) and
-;; others. pcl-cvs.el uses ewoc.el.
+;; others. pcl-cvs.el and vc.el use ewoc.el.
;;
;; Ewoc can be considered as the `view' part of a model-view-controller.
;;
(not (eq dll node))))
(setq node (ewoc--node-right node))))))
-(defun ewoc--insert-new-node (node data pretty-printer)
+(defun ewoc--insert-new-node (node data pretty-printer dll)
"Insert before NODE a new node for DATA, displayed by PRETTY-PRINTER.
+Fourth arg DLL -- from `(ewoc--dll EWOC)' -- is for internal purposes.
Call PRETTY-PRINTER with point at NODE's start, thus pushing back
NODE and leaving the new node's start there. Return the new node."
(save-excursion
(unless header (setq header ""))
(unless footer (setq footer ""))
(setf (ewoc--node-start-marker dll) (copy-marker pos)
- foot (ewoc--insert-new-node dll footer hf-pp)
- head (ewoc--insert-new-node foot header hf-pp)
+ foot (ewoc--insert-new-node dll footer hf-pp dll)
+ head (ewoc--insert-new-node foot header hf-pp dll)
(ewoc--hf-pp new-ewoc) hf-pp
(ewoc--footer new-ewoc) foot
(ewoc--header new-ewoc) head))
"Enter a new element DATA before NODE in EWOC.
Return the new node."
(ewoc--set-buffer-bind-dll ewoc
- (ewoc--insert-new-node node data (ewoc--pretty-printer ewoc))))
+ (ewoc--insert-new-node node data (ewoc--pretty-printer ewoc) dll)))
(defun ewoc-next (ewoc node)
"Return the node in EWOC that follows NODE.
;; Never step below the first element.
;; (unless (ewoc--filter-hf-nodes ewoc node)
;; (setq node (ewoc--node-nth dll -2)))
+ (unless node
+ (error "No next"))
(ewoc-goto-node ewoc node)))
(defun ewoc-goto-node (ewoc node)
(if (apply predicate (ewoc--node-data node) args)
(push (ewoc--node-data node) result))
(setq node (ewoc--node-prev dll node)))
- (nreverse result)))
+ result))
(defun ewoc-buffer (ewoc)
"Return the buffer that is associated with EWOC.
;; eval: (put 'ewoc--set-buffer-bind-dll-let* 'lisp-indent-hook 2)
;; End:
-;; arch-tag: d78915b9-9a07-44bf-aac6-04a1fc1bd6d4
;;; ewoc.el ends here