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- ;;; wid-browse.el --- Functions for browsing widgets.
- ;;
- ;; Copyright (C) 1997 Free Software Foundation, Inc.
- ;;
- ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
- ;; Keywords: extensions
- ;; Version: 1.9960
- ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
-
- ;; This file is part of GNU Emacs.
-
- ;; 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.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; 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., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
- ;;
- ;; Widget browser. See `widget.el'.
-
- ;;; Code:
-
- (require 'easymenu)
- (require 'custom)
- (require 'wid-edit)
- (eval-when-compile (require 'cl))
-
- (defgroup widget-browse nil
- "Customization support for browsing widgets."
- :group 'widgets)
-
- ;;; The Mode.
-
- (defvar widget-browse-mode-map nil
- "Keymap for `widget-browse-mode'.")
-
- (unless widget-browse-mode-map
- (setq widget-browse-mode-map (make-sparse-keymap))
- (set-keymap-parent widget-browse-mode-map widget-keymap)
- (define-key widget-browse-mode-map "q" 'bury-buffer))
-
- (easy-menu-define widget-browse-mode-customize-menu
- widget-browse-mode-map
- "Menu used in widget browser buffers."
- (customize-menu-create 'widgets))
-
- (easy-menu-define widget-browse-mode-menu
- widget-browse-mode-map
- "Menu used in widget browser buffers."
- '("Widget"
- ["Browse" widget-browse t]
- ["Browse At" widget-browse-at t]))
-
- (defcustom widget-browse-mode-hook nil
- "Hook called when entering widget-browse-mode."
- :type 'hook
- :group 'widget-browse)
-
- (defun widget-browse-mode ()
- "Major mode for widget browser buffers.
-
- The following commands are available:
-
- \\[widget-forward] Move to next button or editable field.
- \\[widget-backward] Move to previous button or editable field.
- \\[widget-button-click] Activate button under the mouse pointer.
- \\[widget-button-press] Activate button under point.
-
- Entry to this mode calls the value of `widget-browse-mode-hook'
- if that value is non-nil."
- (kill-all-local-variables)
- (setq major-mode 'widget-browse-mode
- mode-name "Widget")
- (use-local-map widget-browse-mode-map)
- (easy-menu-add widget-browse-mode-customize-menu)
- (easy-menu-add widget-browse-mode-menu)
- (run-hooks 'widget-browse-mode-hook))
-
- ;;; Commands.
-
- ;;;###autoload
- (defun widget-browse-at (pos)
- "Browse the widget under point."
- (interactive "d")
- (let* ((field (get-char-property pos 'field))
- (button (get-char-property pos 'button))
- (doc (get-char-property pos 'widget-doc))
- (text (cond (field "This is an editable text area.")
- (button "This is an active area.")
- (doc "This is documentation text.")
- (t "This is unidentified text.")))
- (widget (or field button doc)))
- (when widget
- (widget-browse widget))
- (message text)))
-
- (defvar widget-browse-history nil)
-
- ;;;###autoload
- (defun widget-browse (widget)
- "Create a widget browser for WIDGET."
- (interactive (list (completing-read "Widget: "
- obarray
- (lambda (symbol)
- (get symbol 'widget-type))
- t nil 'widget-browse-history)))
- (if (stringp widget)
- (setq widget (intern widget)))
- (unless (if (symbolp widget)
- (get widget 'widget-type)
- (and (consp widget)
- (get (widget-type widget) 'widget-type)))
- (error "Not a widget."))
- ;; Create the buffer.
- (if (symbolp widget)
- (let ((buffer (format "*Browse %s Widget*" widget)))
- (kill-buffer (get-buffer-create buffer))
- (switch-to-buffer (get-buffer-create buffer)))
- (kill-buffer (get-buffer-create "*Browse Widget*"))
- (switch-to-buffer (get-buffer-create "*Browse Widget*")))
- (widget-browse-mode)
-
- ;; Quick way to get out.
- ;; (widget-create 'push-button
- ;; :action (lambda (widget &optional event)
- ;; (bury-buffer))
- ;; "Quit")
- ;; (widget-insert "\n")
-
- ;; Top text indicating whether it is a class or object browser.
- (if (listp widget)
- (widget-insert "Widget object browser.\n\nClass: ")
- (widget-insert "Widget class browser.\n\n")
- (widget-create 'widget-browse
- :format "%[%v%]\n%d"
- :doc (get widget 'widget-documentation)
- widget)
- (unless (eq (preceding-char) ?\n)
- (widget-insert "\n"))
- (widget-insert "\nSuper: ")
- (setq widget (get widget 'widget-type)))
-
- ;; Now show the attributes.
- (let ((name (car widget))
- (items (cdr widget))
- key value printer)
- (widget-create 'widget-browse
- :format "%[%v%]"
- name)
- (widget-insert "\n")
- (while items
- (setq key (nth 0 items)
- value (nth 1 items)
- printer (or (get key 'widget-keyword-printer)
- 'widget-browse-sexp)
- items (cdr (cdr items)))
- (widget-insert "\n" (symbol-name key) "\n\t")
- (funcall printer widget key value)
- (widget-insert "\n")))
- (widget-setup)
- (goto-char (point-min)))
-
- ;;;###autoload
- (defun widget-browse-other-window (&optional widget)
- "Show widget browser for WIDGET in other window."
- (interactive)
- (let ((window (selected-window)))
- (switch-to-buffer-other-window "*Browse Widget*")
- (if widget
- (widget-browse widget)
- (call-interactively 'widget-browse))
- (select-window window)))
-
-
- ;;; The `widget-browse' Widget.
-
- (define-widget 'widget-browse 'push-button
- "Button for creating a widget browser.
- The :value of the widget shuld be the widget to be browsed."
- :format "%[[%v]%]"
- :value-create 'widget-browse-value-create
- :action 'widget-browse-action)
-
- (defun widget-browse-action (widget &optional event)
- ;; Create widget browser for WIDGET's :value.
- (widget-browse (widget-get widget :value)))
-
- (defun widget-browse-value-create (widget)
- ;; Insert type name.
- (let ((value (widget-get widget :value)))
- (cond ((symbolp value)
- (insert (symbol-name value)))
- ((consp value)
- (insert (symbol-name (widget-type value))))
- (t
- (insert "strange")))))
-
- ;;; Keyword Printer Functions.
-
- (defun widget-browse-widget (widget key value)
- "Insert description of WIDGET's KEY VALUE.
- VALUE is assumed to be a widget."
- (widget-create 'widget-browse value))
-
- (defun widget-browse-widgets (widget key value)
- "Insert description of WIDGET's KEY VALUE.
- VALUE is assumed to be a list of widgets."
- (while value
- (widget-create 'widget-browse
- (car value))
- (setq value (cdr value))
- (when value
- (widget-insert " "))))
-
- (defun widget-browse-sexp (widget key value)
- "Insert description of WIDGET's KEY VALUE.
- Nothing is assumed about value."
- (let ((pp (condition-case signal
- (pp-to-string value)
- (error (prin1-to-string signal)))))
- (when (string-match "\n\\'" pp)
- (setq pp (substring pp 0 (1- (length pp)))))
- (if (cond ((string-match "\n" pp)
- nil)
- ((> (length pp) (- (window-width) (current-column)))
- nil)
- (t t))
- (widget-insert pp)
- (widget-create 'push-button
- :tag "show"
- :action (lambda (widget &optional event)
- (with-output-to-temp-buffer
- "*Pp Eval Output*"
- (princ (widget-get widget :value))))
- pp))))
-
- (defun widget-browse-sexps (widget key value)
- "Insert description of WIDGET's KEY VALUE.
- VALUE is assumed to be a list of widgets."
- (let ((target (current-column)))
- (while value
- (widget-browse-sexp widget key (car value))
- (setq value (cdr value))
- (when value
- (widget-insert "\n" (make-string target ?\ ))))))
-
- ;;; Keyword Printers.
-
- (put :parent 'widget-keyword-printer 'widget-browse-widget)
- (put :children 'widget-keyword-printer 'widget-browse-widgets)
- (put :buttons 'widget-keyword-printer 'widget-browse-widgets)
- (put :button 'widget-keyword-printer 'widget-browse-widget)
- (put :args 'widget-keyword-printer 'widget-browse-sexps)
-
- ;;; Widget Minor Mode.
-
- (defvar widget-minor-mode nil
- "I non-nil, we are in Widget Minor Mode.")
- (make-variable-buffer-local 'widget-minor-mode)
-
- (defvar widget-minor-mode-map nil
- "Keymap used in Widget Minor Mode.")
-
- (unless widget-minor-mode-map
- (setq widget-minor-mode-map (make-sparse-keymap))
- (set-keymap-parent widget-minor-mode-map widget-keymap))
-
- ;;;###autoload
- (defun widget-minor-mode (&optional arg)
- "Togle minor mode for traversing widgets.
- With arg, turn widget mode on if and only if arg is positive."
- (interactive "P")
- (cond ((null arg)
- (setq widget-minor-mode (not widget-minor-mode)))
- ((<= arg 0)
- (setq widget-minor-mode nil))
- (t
- (setq widget-minor-mode t)))
- (force-mode-line-update))
-
- (add-to-list 'minor-mode-alist '(widget-minor-mode " Widget"))
-
- (add-to-list 'minor-mode-map-alist
- (cons 'widget-minor-mode widget-minor-mode-map))
-
- ;;; The End:
-
- (provide 'wid-browse)
-
- ;; wid-browse.el ends here
-