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comparison lisp/custom/wid-browse.el @ 28:1917ad0d78d7 r19-15b97

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Import from CVS: tag r19-15b97
author cvs
date Mon, 13 Aug 2007 08:51:55 +0200
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27:0a3286277d9b 28:1917ad0d78d7
1 ;;; wid-browse.el --- Functions for browsing widgets.
2 ;;
3 ;; Copyright (C) 1997 Free Software Foundation, Inc.
4 ;;
5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
6 ;; Keywords: extensions
7 ;; Version: 1.50
8 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
9
10 ;;; Commentary:
11 ;;
12 ;; Widget browser. See `widget.el'.
13
14 ;;; Code:
15
16 (require 'easymenu)
17 (require 'custom)
18 (require 'wid-edit)
19 (require 'cl)
20
21 (defgroup widget-browse nil
22 "Customization support for browsing widgets."
23 :group 'widgets)
24
25 ;;; The Mode.
26
27 (defvar widget-browse-mode-map nil
28 "Keymap for `widget-browse-mode'.")
29
30 (unless widget-browse-mode-map
31 (setq widget-browse-mode-map (make-sparse-keymap))
32 (set-keymap-parent widget-browse-mode-map widget-keymap))
33
34 (easy-menu-define widget-browse-mode-menu
35 widget-browse-mode-map
36 "Menu used in widget browser buffers."
37 '("Widget"
38 ["Browse" widget-browse t]
39 ["Browse At" widget-browse-at t]))
40
41 (defcustom widget-browse-mode-hook nil
42 "Hook called when entering widget-browse-mode."
43 :type 'hook
44 :group 'widget-browse)
45
46 (defun widget-browse-mode ()
47 "Major mode for widget browser buffers.
48
49 The following commands are available:
50
51 \\[widget-forward] Move to next button or editable field.
52 \\[widget-backward] Move to previous button or editable field.
53 \\[widget-button-click] Activate button under the mouse pointer.
54 \\[widget-button-press] Activate button under point.
55
56 Entry to this mode calls the value of `widget-browse-mode-hook'
57 if that value is non-nil."
58 (kill-all-local-variables)
59 (setq major-mode 'widget-browse-mode
60 mode-name "Widget")
61 (use-local-map widget-browse-mode-map)
62 (easy-menu-add widget-browse-mode-menu)
63 (run-hooks 'widget-browse-mode-hook))
64
65 ;;; Commands.
66
67 ;;;###autoload
68 (defun widget-browse-at (pos)
69 "Browse the widget under point."
70 (interactive "d")
71 (let* ((field (get-text-property pos 'field))
72 (button (get-text-property pos 'button))
73 (doc (get-text-property pos 'widget-doc))
74 (text (cond (field "This is an editable text area.")
75 (button "This is an active area.")
76 (doc "This is documentation text.")
77 (t "This is unidentified text.")))
78 (widget (or field button doc)))
79 (when widget
80 (widget-browse widget))
81 (message text)))
82
83 (defvar widget-browse-history nil)
84
85 (defun widget-browse (widget)
86 "Create a widget browser for WIDGET."
87 (interactive (list (completing-read "Widget: "
88 obarray
89 (lambda (symbol)
90 (get symbol 'widget-type))
91 t nil 'widget-browse-history)))
92 (if (stringp widget)
93 (setq widget (intern widget)))
94 (unless (if (symbolp widget)
95 (get widget 'widget-type)
96 (and (consp widget)
97 (get (widget-type widget) 'widget-type)))
98 (error "Not a widget."))
99 ;; Create the buffer.
100 (if (symbolp widget)
101 (let ((buffer (format "*Browse %s Widget*" widget)))
102 (kill-buffer (get-buffer-create buffer))
103 (switch-to-buffer (get-buffer-create buffer)))
104 (kill-buffer (get-buffer-create "*Browse Widget*"))
105 (switch-to-buffer (get-buffer-create "*Browse Widget*")))
106 (widget-browse-mode)
107
108 ;; Quick way to get out.
109 (widget-create 'push-button
110 :action (lambda (widget &optional event)
111 (bury-buffer))
112 "Quit")
113 (widget-insert "\n")
114
115 ;; Top text indicating whether it is a class or object browser.
116 (if (listp widget)
117 (widget-insert "Widget object browser.\n\nClass: ")
118 (widget-insert "Widget class browser.\n\n")
119 (widget-create 'widget-browse
120 :format "%[%v%]\n%d"
121 :doc (get widget 'widget-documentation)
122 widget)
123 (unless (eq (preceding-char) ?\n)
124 (widget-insert "\n"))
125 (widget-insert "\nSuper: ")
126 (setq widget (get widget 'widget-type)))
127
128 ;; Now show the attributes.
129 (let ((name (car widget))
130 (items (cdr widget))
131 key value printer)
132 (widget-create 'widget-browse
133 :format "%[%v%]"
134 name)
135 (widget-insert "\n")
136 (while items
137 (setq key (nth 0 items)
138 value (nth 1 items)
139 printer (or (get key 'widget-keyword-printer)
140 'widget-browse-sexp)
141 items (cdr (cdr items)))
142 (widget-insert "\n" (symbol-name key) "\n\t")
143 (funcall printer widget key value)
144 (widget-insert "\n")))
145 (widget-setup)
146 (goto-char (point-min)))
147
148 ;;; The `widget-browse' Widget.
149
150 (define-widget 'widget-browse 'push-button
151 "Button for creating a widget browser.
152 The :value of the widget shuld be the widget to be browsed."
153 :format "%[[%v]%]"
154 :value-create 'widget-browse-value-create
155 :action 'widget-browse-action)
156
157 (defun widget-browse-action (widget &optional event)
158 ;; Create widget browser for WIDGET's :value.
159 (widget-browse (widget-get widget :value)))
160
161 (defun widget-browse-value-create (widget)
162 ;; Insert type name.
163 (let ((value (widget-get widget :value)))
164 (cond ((symbolp value)
165 (insert (symbol-name value)))
166 ((consp value)
167 (insert (symbol-name (widget-type value))))
168 (t
169 (insert "strange")))))
170
171 ;;; Keyword Printer Functions.
172
173 (defun widget-browse-widget (widget key value)
174 "Insert description of WIDGET's KEY VALUE.
175 VALUE is assumed to be a widget."
176 (widget-create 'widget-browse value))
177
178 (defun widget-browse-widgets (widget key value)
179 "Insert description of WIDGET's KEY VALUE.
180 VALUE is assumed to be a list of widgets."
181 (while value
182 (widget-create 'widget-browse
183 (car value))
184 (setq value (cdr value))
185 (when value
186 (widget-insert " "))))
187
188 (defun widget-browse-sexp (widget key value)
189 "Insert description of WIDGET's KEY VALUE.
190 Nothing is assumed about value."
191 (let ((pp (condition-case signal
192 (pp-to-string value)
193 (error (prin1-to-string signal)))))
194 (when (string-match "\n\\'" pp)
195 (setq pp (substring pp 0 (1- (length pp)))))
196 (if (cond ((string-match "\n" pp)
197 nil)
198 ((> (length pp) (- (window-width) (current-column)))
199 nil)
200 (t t))
201 (widget-insert pp)
202 (widget-create 'push-button
203 :tag "show"
204 :action (lambda (widget &optional event)
205 (with-output-to-temp-buffer
206 "*Pp Eval Output*"
207 (princ (widget-get widget :value))))
208 pp))))
209
210 (defun widget-browse-sexps (widget key value)
211 "Insert description of WIDGET's KEY VALUE.
212 VALUE is assumed to be a list of widgets."
213 (let ((target (current-column)))
214 (while value
215 (widget-browse-sexp widget key (car value))
216 (setq value (cdr value))
217 (when value
218 (widget-insert "\n" (make-string target ?\ ))))))
219
220 ;;; Keyword Printers.
221
222 (put :parent 'widget-keyword-printer 'widget-browse-widget)
223 (put :children 'widget-keyword-printer 'widget-browse-widgets)
224 (put :buttons 'widget-keyword-printer 'widget-browse-widgets)
225 (put :button 'widget-keyword-printer 'widget-browse-widget)
226 (put :args 'widget-keyword-printer 'widget-browse-sexps)
227
228 ;;; The End:
229
230 (provide 'wid-browse)
231
232 ;; wid-browse.el ends here