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authorRichard M. Stallman1993-01-08 15:12:37 +0000
committerRichard M. Stallman1993-01-08 15:12:37 +0000
commit2e9c66ab52c654a568bebeeca78e5ee7a6143608 (patch)
treee3de533064c6121d8a3acdba73c69db797857175
parentce7385cb6092f7195515be8cd0d8a52e9d2534ee (diff)
downloademacs-2e9c66ab52c654a568bebeeca78e5ee7a6143608.tar.gz
emacs-2e9c66ab52c654a568bebeeca78e5ee7a6143608.zip
entered into RCS
-rw-r--r--lisp/sc-alist.el134
-rw-r--r--lisp/sc.elec.el198
2 files changed, 332 insertions, 0 deletions
diff --git a/lisp/sc-alist.el b/lisp/sc-alist.el
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1;; -*- Mode: Emacs-Lisp -*-
2;; sc-alist.el -- Version 1.0 (used to be baw-alist.el)
3
4;; association list utilities providing insertion, deletion, sorting
5;; fetching off key-value pairs in association lists.
6
7;; ========== Disclaimer ==========
8;; This software is distributed in the hope that it will be useful,
9;; but WITHOUT ANY WARRANTY. No author or distributor accepts
10;; responsibility to anyone for the consequences of using it or for
11;; whether it serves any particular purpose or works at all, unless he
12;; says so in writing.
13
14;; This software was written as part of the supercite author's
15;; official duty as an employee of the United States Government and is
16;; thus in the public domain. You are free to use that particular
17;; software as you wish, but WITHOUT ANY WARRANTY WHATSOEVER. It
18;; would be nice, though if when you use any of this code, you give
19;; due credit to the author.
20
21;; ========== Author (unless otherwise stated) ========================
22;; NAME: Barry A. Warsaw USMAIL: Century Computing, Inc.
23;; TELE: (301) 593-3330 1014 West Street
24;; INET: bwarsaw@cen.com Laurel, Md 20707
25;; UUCP: uunet!cen.com!bwarsaw
26;;
27(provide 'sc-alist)
28
29
30(defun asort (alist-symbol key)
31 "Move a specified key-value pair to the head of an alist.
32The alist is referenced by ALIST-SYMBOL. Key-value pair to move to
33head is one matching KEY. Returns the sorted list and doesn't affect
34the order of any other key-value pair. Side effect sets alist to new
35sorted list."
36 (set alist-symbol
37 (sort (copy-alist (eval alist-symbol))
38 (function (lambda (a b) (equal (car a) key))))))
39
40
41(defun aelement (key value)
42 "Makes a list of a cons cell containing car of KEY and cdr of VALUE.
43The returned list is suitable as an element of an alist."
44 (list (cons key value)))
45
46
47(defun aheadsym (alist)
48 "Return the key symbol at the head of ALIST."
49 (car (car alist)))
50
51
52(defun anot-head-p (alist key)
53 "Find out if a specified key-value pair is not at the head of an alist.
54The alist to check is specified by ALIST and the key-value pair is the
55one matching the supplied KEY. Returns nil if ALIST is nil, or if
56key-value pair is at the head of the alist. Returns t if key-value
57pair is not at the head of alist. ALIST is not altered."
58 (not (equal (aheadsym alist) key)))
59
60
61(defun aput (alist-symbol key &optional value)
62 "Inserts a key-value pair into an alist.
63The alist is referenced by ALIST-SYMBOL. The key-value pair is made
64from KEY and optionally, VALUE. Returns the altered alist or nil if
65ALIST is nil.
66
67If the key-value pair referenced by KEY can be found in the alist, and
68VALUE is supplied non-nil, then the value of KEY will be set to VALUE.
69If VALUE is not supplied, or is nil, the key-value pair will not be
70modified, but will be moved to the head of the alist. If the key-value
71pair cannot be found in the alist, it will be inserted into the head
72of the alist (with value nil if VALUE is nil or not supplied)."
73 (let ((elem (aelement key value))
74 alist)
75 (asort alist-symbol key)
76 (setq alist (eval alist-symbol))
77 (cond ((null alist) (set alist-symbol elem))
78 ((anot-head-p alist key) (set alist-symbol (nconc elem alist)))
79 (value (setcar alist (car elem)))
80 (t alist))))
81
82
83(defun adelete (alist-symbol key)
84 "Delete a key-value pair from the alist.
85Alist is referenced by ALIST-SYMBOL and the key-value pair to remove
86is pair matching KEY. Returns the altered alist."
87 (asort alist-symbol key)
88 (let ((alist (eval alist-symbol)))
89 (cond ((null alist) nil)
90 ((anot-head-p alist key) alist)
91 (t (set alist-symbol (cdr alist))))))
92
93
94(defun aget (alist key &optional keynil-p)
95 "Returns the value in ALIST that is associated with KEY.
96Optional KEYNIL-P describes what to do if the value associated with
97KEY is nil. If KEYNIL-P is not supplied or is nil, and the value is
98nil, then KEY is returned. If KEYNIL-P is non-nil, then nil would be
99returned.
100
101If no key-value pair matching KEY could be found in ALIST, or ALIST is
102nil then nil is returned. ALIST is not altered."
103 (let ((copy (copy-alist alist)))
104 (cond ((null alist) nil)
105 ((progn (asort 'copy key)
106 (anot-head-p copy key)) nil)
107 ((cdr (car copy)))
108 (keynil-p nil)
109 ((car (car copy)))
110 (t nil))))
111
112
113(defun amake (alist-symbol keylist &optional valuelist)
114 "Make an association list.
115The association list is attached to the alist referenced by
116ALIST-SYMBOL. Each element in the KEYLIST becomes a key and is
117associated with the value in VALUELIST with the same index. If
118VALUELIST is not supplied or is nil, then each key in KEYLIST is
119associated with nil.
120
121KEYLIST and VALUELIST should have the same number of elements, but
122this isn't enforced. If VALUELIST is smaller than KEYLIST, remaining
123keys are associated with nil. If VALUELIST is larger than KEYLIST,
124extra values are ignored. Returns the created alist."
125 (let ((keycar (car keylist))
126 (keycdr (cdr keylist))
127 (valcar (car valuelist))
128 (valcdr (cdr valuelist)))
129 (cond ((null keycdr)
130 (aput alist-symbol keycar valcar))
131 (t
132 (amake alist-symbol keycdr valcdr)
133 (aput alist-symbol keycar valcar))))
134 (eval alist-symbol))
diff --git a/lisp/sc.elec.el b/lisp/sc.elec.el
new file mode 100644
index 00000000000..67f18c66a5e
--- /dev/null
+++ b/lisp/sc.elec.el
@@ -0,0 +1,198 @@
1;; -*- Mode: Emacs-Lisp -*-
2;; sc-elec.el -- Version 2.3
3
4;; ========== Introduction ==========
5;; This file contains sc-electric mode for viewing reference headers.
6;; It is loaded automatically by supercite.el when needed.
7
8;; ========== Disclaimer ==========
9;; This software is distributed in the hope that it will be useful,
10;; but WITHOUT ANY WARRANTY. No author or distributor accepts
11;; responsibility to anyone for the consequences of using it or for
12;; whether it serves any particular purpose or works at all, unless he
13;; says so in writing.
14
15;; Some of this software was written as part of the supercite author's
16;; official duty as an employee of the United States Government and is
17;; thus in the public domain. You are free to use that particular
18;; software as you wish, but WITHOUT ANY WARRANTY WHATSOEVER. It
19;; would be nice, though if when you use any of this code, you give
20;; due credit to the author.
21
22;; Other parts of this code were written by other people. Wherever
23;; possible, credit to that author, and the copy* notice supplied by
24;; the author are included with that code. In all cases, the spirit,
25;; if not the letter of the GNU General Public Licence applies.
26
27;; ========== Author (unless otherwise stated) ==========
28;; NAME: Barry A. Warsaw USMAIL: Century Computing, Inc.
29;; TELE: (301) 593-3330 1014 West Street
30;; UUCP: uunet!cen.com!bwarsaw Laurel, MD 20707
31;; INET: bwarsaw@cen.com
32
33;; Want to be on the Supercite mailing list?
34;;
35;; Send articles to:
36;; INET: supercite@anthem.nlm.nih.gov
37;; UUCP: uunet!anthem.nlm.nih.gov!supercite
38;;
39;; Send administrivia (additions/deletions to list, etc) to:
40;; INET: supercite-request@anthem.nlm.nih.gov
41;; UUCP: uunet!anthem.nlm.nih.gov!supercite-request
42;;
43(provide 'sc-elec)
44
45
46;; ======================================================================
47;; set up vars for major mode
48
49(defconst sc-electric-bufname "*sc-erefs*"
50 "*Supercite's electric buffer name.")
51
52
53(defvar sc-electric-mode-hook nil
54 "*Hook for sc-electric-mode.")
55
56
57
58;; ======================================================================
59;; sc-electric-mode
60
61(defun sc-electric-mode (&optional arg)
62 "Quasi major mode for viewing supercite reference headers.
63Commands are: \\{sc-electric-mode-map}
64Sc-electric-mode is not intended to be run interactively, but rather
65accessed through supercite's electric reference feature. See
66sc-insert-reference for more details. Optional ARG is the initial
67header style to use, unless not supplied or invalid, in which case
68sc-preferred-header-style is used."
69 (let ((gal sc-gal-information)
70 (sc-eref-style (if arg ;; assume passed arg is okay
71 arg
72 (if (and (natnump sc-preferred-header-style)
73 (sc-valid-index-p sc-preferred-header-style))
74 sc-preferred-header-style
75 0))))
76 (get-buffer-create sc-electric-bufname)
77 ;; set up buffer and enter command loop
78 (save-excursion
79 (save-window-excursion
80 (pop-to-buffer sc-electric-bufname)
81 (kill-all-local-variables)
82 (setq sc-gal-information gal
83 buffer-read-only t
84 mode-name "Supercite-Electric-References"
85 major-mode 'sc-electric-mode)
86 (use-local-map sc-electric-mode-map)
87 (sc-eref-show sc-eref-style)
88 (run-hooks 'sc-electric-mode-hook)
89 (recursive-edit)
90 ))
91 (if sc-eref-style
92 (condition-case nil
93 (eval (nth sc-eref-style sc-rewrite-header-list))
94 (error nil)
95 ))
96 ;; now restore state
97 (kill-buffer sc-electric-bufname)
98 ))
99
100
101
102;; ======================================================================
103;; functions for electric mode
104
105(defun sc-eref-index (index)
106 "Check INDEX to be sure it is a valid index into sc-rewrite-header-list.
107If sc-electric-circular-p is non-nil, then list is considered circular
108so that movement across the ends of the list wraparound."
109 (let ((last (1- (length sc-rewrite-header-list))))
110 (cond ((sc-valid-index-p index) index)
111 ((< index 0)
112 (if sc-electric-circular-p last
113 (progn (error "No preceding reference headers in list.") 0)))
114 ((> index last)
115 (if sc-electric-circular-p 0
116 (progn (error "No following reference headers in list.") last)))
117 )
118 ))
119
120
121(defun sc-eref-show (index)
122 "Show reference INDEX in sc-rewrite-header-list."
123 (setq sc-eref-style (sc-eref-index index))
124 (save-excursion
125 (set-buffer sc-electric-bufname)
126 (let ((ref (nth sc-eref-style sc-rewrite-header-list))
127 (buffer-read-only nil))
128 (erase-buffer)
129 (goto-char (point-min))
130 (condition-case err
131 (progn
132 (set-mark (point-min))
133 (eval ref)
134 (message "Showing reference header %d." sc-eref-style)
135 (goto-char (point-max))
136 )
137 (void-function
138 (progn (message
139 "Symbol's function definition is void: %s (Header %d)"
140 (symbol-name (car (cdr err)))
141 sc-eref-style)
142 (beep)
143 ))
144 ))))
145
146
147
148;; ======================================================================
149;; interactive commands
150
151(defun sc-eref-next ()
152 "Display next reference in other buffer."
153 (interactive)
154 (sc-eref-show (1+ sc-eref-style)))
155
156
157(defun sc-eref-prev ()
158 "Display previous reference in other buffer."
159 (interactive)
160 (sc-eref-show (1- sc-eref-style)))
161
162
163(defun sc-eref-setn ()
164 "Set reference header selected as preferred."
165 (interactive)
166 (setq sc-preferred-header-style sc-eref-style)
167 (message "Preferred reference style set to header %d." sc-eref-style))
168
169
170(defun sc-eref-goto (refnum)
171 "Show reference style indexed by REFNUM.
172If REFNUM is an invalid index, don't go to that reference and return
173nil."
174 (interactive "NGoto Reference: ")
175 (if (sc-valid-index-p refnum)
176 (sc-eref-show refnum)
177 (error "Invalid reference: %d. (Range: [%d .. %d])"
178 refnum 0 (1- (length sc-rewrite-header-list)))
179 ))
180
181
182(defun sc-eref-jump ()
183 "Set reference header to preferred header."
184 (interactive)
185 (sc-eref-show sc-preferred-header-style))
186
187
188(defun sc-eref-abort ()
189 "Exit from electric reference mode without inserting reference."
190 (interactive)
191 (setq sc-eref-style nil)
192 (exit-recursive-edit))
193
194
195(defun sc-eref-exit ()
196 "Exit from electric reference mode and insert selected reference."
197 (interactive)
198 (exit-recursive-edit))