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1 ;;; wid-browse.el --- Functions for browsing widgets.
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2 ;;
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3 ;; Copyright (C) 1997 Free Software Foundation, Inc.
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4 ;;
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5 ;; Author: Per Abrahamsen <abraham@dina.kvl.dk>
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6 ;; Keywords: extensions
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7 ;; Version: 1.9960
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8 ;; X-URL: http://www.dina.kvl.dk/~abraham/custom/
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9
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10 ;; This file is part of XEmacs.
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209
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11
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12 ;; XEmacs is free software; you can redistribute it and/or modify
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13 ;; it under the terms of the GNU General Public License as published by
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14 ;; the Free Software Foundation; either version 2, or (at your option)
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15 ;; any later version.
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16
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17 ;; XEmacs is distributed in the hope that it will be useful,
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209
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18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 ;; GNU General Public License for more details.
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21
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22 ;; You should have received a copy of the GNU General Public License
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613
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23 ;; along with XEmacs; see the file COPYING. If not, write to the
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209
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24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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25 ;; Boston, MA 02111-1307, USA.
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26
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27 ;;; Commentary:
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28 ;;
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29 ;; Widget browser. See `widget.el'.
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30
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31 ;;; Code:
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32
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33 (require 'easymenu)
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34 (require 'custom)
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35 (require 'wid-edit)
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36 (eval-when-compile (require 'cl))
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37
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38 (defgroup widget-browse nil
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39 "Customization support for browsing widgets."
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40 :group 'widgets)
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41
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42 ;;; The Mode.
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43
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44 (defvar widget-browse-mode-map nil
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45 "Keymap for `widget-browse-mode'.")
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46
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47 (unless widget-browse-mode-map
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48 (setq widget-browse-mode-map (make-sparse-keymap))
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49 (set-keymap-parent widget-browse-mode-map widget-keymap)
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50 (define-key widget-browse-mode-map "q" 'bury-buffer))
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51
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52 (easy-menu-define widget-browse-mode-customize-menu
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53 widget-browse-mode-map
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54 "Menu used in widget browser buffers."
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55 (customize-menu-create 'widgets))
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56
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57 (easy-menu-define widget-browse-mode-menu
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58 widget-browse-mode-map
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59 "Menu used in widget browser buffers."
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60 '("Widget"
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61 ["Browse" widget-browse t]
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62 ["Browse At" widget-browse-at t]))
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63
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64 (defcustom widget-browse-mode-hook nil
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65 "Hook called when entering widget-browse-mode."
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66 :type 'hook
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67 :group 'widget-browse)
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68
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69 (defun widget-browse-mode ()
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70 "Major mode for widget browser buffers.
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71
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72 The following commands are available:
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73
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74 \\[widget-forward] Move to next button or editable field.
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75 \\[widget-backward] Move to previous button or editable field.
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76 \\[widget-button-click] Activate button under the mouse pointer.
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77 \\[widget-button-press] Activate button under point.
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78
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79 Entry to this mode calls the value of `widget-browse-mode-hook'
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80 if that value is non-nil."
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81 (kill-all-local-variables)
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82 (setq major-mode 'widget-browse-mode
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83 mode-name "Widget")
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84 (use-local-map widget-browse-mode-map)
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85 (easy-menu-add widget-browse-mode-customize-menu)
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86 (easy-menu-add widget-browse-mode-menu)
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87 (run-hooks 'widget-browse-mode-hook))
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88
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89 ;;; Commands.
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90
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91 ;;;###autoload
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92 (defun widget-browse-at (pos)
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93 "Browse the widget under point."
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94 (interactive "d")
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95 (let* ((field (get-char-property pos 'field))
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96 (button (get-char-property pos 'button))
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97 (doc (get-char-property pos 'widget-doc))
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98 (text (cond (field "This is an editable text area.")
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99 (button "This is an active area.")
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100 (doc "This is documentation text.")
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101 (t "This is unidentified text.")))
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102 (widget (or field button doc)))
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103 (when widget
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104 (widget-browse widget))
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105 (message text)))
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106
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107 (defvar widget-browse-history nil)
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108
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109 ;;;###autoload
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110 (defun widget-browse (widget)
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111 "Create a widget browser for WIDGET."
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112 (interactive (list (completing-read "Widget: "
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113 obarray
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114 (lambda (symbol)
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115 (get symbol 'widget-type))
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116 t nil 'widget-browse-history)))
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117 (if (stringp widget)
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118 (setq widget (intern widget)))
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119 (unless (if (symbolp widget)
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120 (get widget 'widget-type)
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121 (and (consp widget)
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122 (get (widget-type widget) 'widget-type)))
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123 (error "Not a widget."))
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124 ;; Create the buffer.
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125 (if (symbolp widget)
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126 (let ((buffer (format "*Browse %s Widget*" widget)))
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127 (kill-buffer (get-buffer-create buffer))
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128 (switch-to-buffer (get-buffer-create buffer)))
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129 (kill-buffer (get-buffer-create "*Browse Widget*"))
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130 (switch-to-buffer (get-buffer-create "*Browse Widget*")))
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131 (widget-browse-mode)
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132
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133 ;; Quick way to get out.
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134 ;; (widget-create 'push-button
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135 ;; :action (lambda (widget &optional event)
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136 ;; (bury-buffer))
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137 ;; "Quit")
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138 ;; (widget-insert "\n")
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139
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140 ;; Top text indicating whether it is a class or object browser.
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141 (if (listp widget)
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142 (widget-insert "Widget object browser.\n\nClass: ")
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143 (widget-insert "Widget class browser.\n\n")
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144 (widget-create 'widget-browse
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145 :format "%[%v%]\n%d"
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146 :doc (get widget 'widget-documentation)
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147 widget)
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148 (unless (eq (preceding-char) ?\n)
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149 (widget-insert "\n"))
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150 (widget-insert "\nSuper: ")
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151 (setq widget (get widget 'widget-type)))
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152
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153 ;; Now show the attributes.
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154 (let ((name (car widget))
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155 (items (cdr widget))
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156 key value printer)
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157 (widget-create 'widget-browse
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158 :format "%[%v%]"
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159 name)
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160 (widget-insert "\n")
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161 (while items
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162 (setq key (nth 0 items)
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163 value (nth 1 items)
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164 printer (or (get key 'widget-keyword-printer)
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165 'widget-browse-sexp)
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166 items (cdr (cdr items)))
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167 (widget-insert "\n" (symbol-name key) "\n\t")
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168 (funcall printer widget key value)
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169 (widget-insert "\n")))
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170 (widget-setup)
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171 (goto-char (point-min)))
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172
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173 ;;;###autoload
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174 (defun widget-browse-other-window (&optional widget)
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175 "Show widget browser for WIDGET in other window."
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176 (interactive)
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177 (let ((window (selected-window)))
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178 (switch-to-buffer-other-window "*Browse Widget*")
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179 (if widget
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180 (widget-browse widget)
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181 (call-interactively 'widget-browse))
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182 (select-window window)))
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183
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184
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185 ;;; The `widget-browse' Widget.
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186
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187 (define-widget 'widget-browse 'push-button
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188 "Button for creating a widget browser.
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189 The :value of the widget shuld be the widget to be browsed."
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190 :format "%[[%v]%]"
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191 :value-create 'widget-browse-value-create
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192 :action 'widget-browse-action)
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193
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194 (defun widget-browse-action (widget &optional event)
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195 ;; Create widget browser for WIDGET's :value.
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196 (widget-browse (widget-get widget :value)))
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197
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198 (defun widget-browse-value-create (widget)
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199 ;; Insert type name.
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200 (let ((value (widget-get widget :value)))
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201 (cond ((symbolp value)
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202 (insert (symbol-name value)))
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203 ((consp value)
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204 (insert (symbol-name (widget-type value))))
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205 (t
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206 (insert "strange")))))
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207
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208 ;;; Keyword Printer Functions.
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209
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210 (defun widget-browse-widget (widget key value)
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211 "Insert description of WIDGET's KEY VALUE.
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212 VALUE is assumed to be a widget."
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213 (widget-create 'widget-browse value))
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214
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215 (defun widget-browse-widgets (widget key value)
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216 "Insert description of WIDGET's KEY VALUE.
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217 VALUE is assumed to be a list of widgets."
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218 (while value
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219 (widget-create 'widget-browse
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220 (car value))
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221 (setq value (cdr value))
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222 (when value
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223 (widget-insert " "))))
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224
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225 (defun widget-browse-sexp (widget key value)
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226 "Insert description of WIDGET's KEY VALUE.
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227 Nothing is assumed about value."
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228 (let ((pp (condition-case signal
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229 (declare-fboundp (pp-to-string value))
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230 (error (prin1-to-string signal)))))
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231 (when (string-match "\n\\'" pp)
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232 (setq pp (substring pp 0 (1- (length pp)))))
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233 (if (cond ((string-match "\n" pp)
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234 nil)
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235 ((> (length pp) (- (window-width) (current-column)))
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236 nil)
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237 (t t))
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238 (widget-insert pp)
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239 (widget-create 'push-button
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240 :tag "show"
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241 :action (lambda (widget &optional event)
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242 (with-output-to-temp-buffer
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243 "*Pp Eval Output*"
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244 (princ (widget-get widget :value))))
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245 pp))))
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246
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247 (defun widget-browse-sexps (widget key value)
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248 "Insert description of WIDGET's KEY VALUE.
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249 VALUE is assumed to be a list of widgets."
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250 (let ((target (current-column)))
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251 (while value
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252 (widget-browse-sexp widget key (car value))
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253 (setq value (cdr value))
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254 (when value
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255 (widget-insert "\n" (make-string target ?\ ))))))
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256
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257 ;;; Keyword Printers.
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258
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259 (put :parent 'widget-keyword-printer 'widget-browse-widget)
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260 (put :children 'widget-keyword-printer 'widget-browse-widgets)
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261 (put :buttons 'widget-keyword-printer 'widget-browse-widgets)
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262 (put :button 'widget-keyword-printer 'widget-browse-widget)
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263 (put :args 'widget-keyword-printer 'widget-browse-sexps)
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264
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265 ;;; Widget Minor Mode.
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266
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267 (defvar widget-minor-mode nil
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268 "I non-nil, we are in Widget Minor Mode.")
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269 (make-variable-buffer-local 'widget-minor-mode)
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270
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271 (defvar widget-minor-mode-map nil
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272 "Keymap used in Widget Minor Mode.")
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273
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274 (unless widget-minor-mode-map
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275 (setq widget-minor-mode-map (make-sparse-keymap))
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276 (set-keymap-parent widget-minor-mode-map widget-keymap))
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277
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278 ;;;###autoload
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279 (defun widget-minor-mode (&optional arg)
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280 "Togle minor mode for traversing widgets.
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281 With arg, turn widget mode on if and only if arg is positive."
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282 (interactive "P")
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283 (cond ((null arg)
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284 (setq widget-minor-mode (not widget-minor-mode)))
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285 ((<= arg 0)
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286 (setq widget-minor-mode nil))
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287 (t
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288 (setq widget-minor-mode t)))
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289 (force-mode-line-update))
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290
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291 (add-to-list 'minor-mode-alist '(widget-minor-mode " Widget"))
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292
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293 (add-to-list 'minor-mode-map-alist
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294 (cons 'widget-minor-mode widget-minor-mode-map))
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295
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296 ;;; The End:
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297
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298 (provide 'wid-browse)
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299
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300 ;; wid-browse.el ends here
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