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1 ;;; widget-edit.el --- Functions for creating and using widgets.
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2 ;;
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3 ;; Copyright (C) 1996 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: help, extensions, faces, hypermedia
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7 ;; Version: 0.4
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8
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9 ;;; Commentary:
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10 ;;
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11 ;; See `widget.el'.
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12
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13 ;;; Code:
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14
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15 (require 'widget)
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16 (require 'cl)
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17
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18 ;;; Compatibility.
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19
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20 (or (fboundp 'event-point)
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21 ;; XEmacs function missing in Emacs.
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22 (defun event-point (event)
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23 "Return the character position of the given mouse-motion, button-press,
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24 or button-release event. If the event did not occur over a window, or did
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25 not occur over text, then this returns nil. Otherwise, it returns an index
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26 into the buffer visible in the event's window."
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27 (posn-point (event-start event))))
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28
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29 (or (fboundp 'set-keymap-parent)
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30 ;; Xemacs function missing in Emacs.
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31 ;; Definition stolen from `lucid.el'.
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32 (defun set-keymap-parent (keymap new-parent)
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33 (let ((tail keymap))
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34 (while (and tail (cdr tail) (not (eq (car (cdr tail)) 'keymap)))
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35 (setq tail (cdr tail)))
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36 (if tail
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37 (setcdr tail new-parent)))))
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38
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39 ;;; Customization.
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40 ;;
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41 ;; These should be specified with the custom package.
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42
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43 (defvar widget-button-face 'bold)
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44 (defvar widget-mouse-face 'highlight)
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45 (defvar widget-field-face 'italic)
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46
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47 ;;; Utility functions.
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48 ;;
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49 ;; These are not really widget specific.
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50
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51 (defun widget-plist-member (plist prop)
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52 ;; Return non-nil if PLIST has the property PROP.
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53 ;; PLIST is a property list, which is a list of the form
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54 ;; (PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol.
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55 ;; Unlike `plist-get', this allows you to distinguish between a missing
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56 ;; property and a property with the value nil.
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57 ;; The value is actually the tail of PLIST whose car is PROP.
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58 (while (and plist (not (eq (car plist) prop)))
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59 (setq plist (cdr (cdr plist))))
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60 plist)
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61
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62 (defun widget-princ-to-string (object)
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63 ;; Return string representation of OBJECT, any Lisp object.
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64 ;; No quoting characters are used; no delimiters are printed around
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65 ;; the contents of strings.
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66 (save-excursion
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67 (set-buffer (get-buffer-create " *widget-tmp*"))
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68 (erase-buffer)
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69 (let ((standard-output (current-buffer)))
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70 (princ object))
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71 (buffer-string)))
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72
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73 (defun widget-clear-undo ()
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74 "Clear all undo information."
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75 (buffer-disable-undo (current-buffer))
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76 (buffer-enable-undo))
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77
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78 ;;; Widget text specifications.
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79 ;;
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80 ;; These functions are for specifying text properties.
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81
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82 (defun widget-specify-none (from to)
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83 ;; Clear all text properties between FROM and TO.
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84 (set-text-properties from to nil))
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85
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86 (defun widget-specify-text (from to)
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87 ;; Default properties.
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88 (add-text-properties from to (list 'read-only t
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89 'front-sticky t
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90 'rear-nonsticky nil)))
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91
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92 (defun widget-specify-field (widget from to)
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93 ;; Specify editable button for WIDGET between FROM and TO.
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94 (widget-specify-field-update widget from to)
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95 ;; Make it possible to edit both end of the field.
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96 (add-text-properties (1- from) from (list 'rear-nonsticky t
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97 'end-open t
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98 'invisible t))
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99 (add-text-properties to (1+ to) (list 'font-sticky nil
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100 'start-open t)))
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101
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102 (defun widget-specify-field-update (widget from to)
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103 ;; Specify editable button for WIDGET between FROM and TO.
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104 (let ((map (widget-get widget :keymap))
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105 (face (or (widget-get widget :value-face)
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106 widget-field-face)))
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107 (add-text-properties from to (list 'field widget
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108 'read-only nil
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109 'local-map map
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110 'keymap map
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111 'face widget-field-face))))
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112
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113 (defun widget-specify-button (widget from to)
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114 ;; Specify button for WIDGET between FROM and TO.
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115 (let ((face (or (widget-get widget :button-face)
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116 widget-button-face)))
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117 (add-text-properties from to (list 'button widget
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118 'mouse-face widget-mouse-face
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119 'face face))))
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120
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121 (defun widget-specify-doc (widget from to)
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122 ;; Specify documentation for WIDGET between FROM and TO.
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123 (put-text-property from to 'widget-doc widget))
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124
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125
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126 (defmacro widget-specify-insert (&rest form)
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127 ;; Execute FORM without inheriting any text properties.
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128 `(save-restriction
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129 (let ((inhibit-read-only t)
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130 result
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131 after-change-functions)
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132 (insert "<>")
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133 (narrow-to-region (- (point) 2) (point))
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134 (widget-specify-none (point-min) (point-max))
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135 (goto-char (1+ (point-min)))
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136 (setq result (progn ,@form))
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137 (delete-region (point-min) (1+ (point-min)))
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138 (delete-region (1- (point-max)) (point-max))
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139 (goto-char (point-max))
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140 result)))
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141
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142 ;;; Widget Properties.
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143
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144 (defun widget-put (widget property value)
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145 "In WIDGET set PROPERTY to VALUE.
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146 The value can later be retrived with `widget-get'."
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147 (setcdr widget (plist-put (cdr widget) property value)))
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148
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149 (defun widget-get (widget property)
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150 "In WIDGET, get the value of PROPERTY.
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151 The value could either be specified when the widget was created, or
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152 later with `widget-put'."
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153 (cond ((widget-plist-member (cdr widget) property)
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154 (plist-get (cdr widget) property))
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155 ((car widget)
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156 (widget-get (get (car widget) 'widget-type) property))
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157 (t nil)))
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158
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159 (defun widget-member (widget property)
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160 "Non-nil iff there is a definition in WIDGET for PROPERTY."
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161 (cond ((widget-plist-member (cdr widget) property)
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162 t)
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163 ((car widget)
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164 (widget-member (get (car widget) 'widget-type) property))
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165 (t nil)))
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166
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167 (defun widget-apply (widget property &rest args)
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168 "Apply the value of WIDGET's PROPERTY to the widget itself.
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169 ARGS are passed as extra argments to the function."
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170 (apply (widget-get widget property) widget args))
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171
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172 (defun widget-value (widget)
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173 "Extract the current value of WIDGET."
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174 (widget-apply widget
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175 :value-to-external (widget-apply widget :value-get)))
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176
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177 (defun widget-value-set (widget value)
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178 "Set the current value of WIDGET to VALUE."
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179 (widget-apply widget
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180 :value-set (widget-apply widget
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181 :value-to-internal value)))
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182
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183 (defun widget-match-inline (widget values)
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184 ;; Match the head of values.
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185 (cond ((widget-get widget :inline)
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186 (widget-apply widget :match-inline values))
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187 ((widget-apply widget :match (car values))
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188 (cons (list (car values)) (cdr values)))
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189 (t nil)))
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190
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191 ;;; Creating Widgets.
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192
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193 (defun widget-create (type &rest args)
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194 "Create widget of TYPE.
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195 The optional ARGS are additional keyword arguments."
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196 (let ((widget (apply 'widget-convert type args)))
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197 (widget-apply widget :create)
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198 widget))
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199
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200 (defun widget-delete (widget)
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201 "Delete WIDGET."
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202 (widget-apply widget :delete))
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203
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204 (defun widget-convert (type &rest args)
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205 "Convert TYPE to a widget without inserting it in the buffer.
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206 The optional ARGS are additional keyword arguments."
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207 ;; Don't touch the type.
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208 (let* ((widget (if (symbolp type)
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209 (list type)
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210 (copy-list type)))
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211 (current widget)
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212 (keys args))
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213 ;; First set the :args keyword.
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214 (while (cdr current) ;Look in the type.
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215 (let ((next (car (cdr current))))
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216 (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
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217 (setq current (cdr (cdr current)))
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218 (setcdr current (list :args (cdr current)))
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219 (setq current nil))))
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220 (while args ;Look in the args.
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221 (let ((next (nth 0 args)))
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222 (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
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223 (setq args (nthcdr 2 args))
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224 (widget-put widget :args args)
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225 (setq args nil))))
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226 ;; Then Convert the widget.
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227 (setq type widget)
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228 (while type
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229 (let ((convert-widget (widget-get type :convert-widget)))
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230 (if convert-widget
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231 (setq widget (funcall convert-widget widget))))
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232 (setq type (get (car type) 'widget-type)))
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233 ;; Finally set the keyword args.
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234 (while keys
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235 (let ((next (nth 0 keys)))
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236 (if (and (symbolp next) (eq (aref (symbol-name next) 0) ?:))
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237 (progn
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238 (widget-put widget next (nth 1 keys))
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239 (setq keys (nthcdr 2 keys)))
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240 (setq keys nil))))
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241 ;; Return the newly create widget.
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242 widget))
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243
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244 (defun widget-insert (&rest args)
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245 "Call `insert' with ARGS and make the text read only."
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246 (let ((inhibit-read-only t)
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247 after-change-functions
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248 (from (point)))
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249 (apply 'insert args)
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250 (widget-specify-text from (point))))
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251
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252 ;;; Keymap and Comands.
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253
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254 (defvar widget-keymap nil
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255 "Keymap containing useful binding for buffers containing widgets.
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256 Recommended as a parent keymap for modes using widgets.")
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257
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258 (if widget-keymap
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259 ()
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260 (setq widget-keymap (make-sparse-keymap))
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261 (set-keymap-parent widget-keymap global-map)
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262 (define-key widget-keymap "\t" 'widget-forward)
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263 (define-key widget-keymap "\M-\t" 'widget-backward)
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264 (define-key widget-keymap [(shift tab)] 'widget-backward)
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265 (if (string-match "XEmacs" (emacs-version))
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266 (define-key widget-keymap [button2] 'widget-button-click)
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267 (define-key widget-keymap [mouse-2] 'widget-button-click))
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268 (define-key widget-keymap "\C-m" 'widget-button-press))
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269
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270 (defvar widget-global-map global-map
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271 "Keymap used for events the widget does not handle themselves.")
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272 (make-variable-buffer-local 'widget-global-map)
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273
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274 (defun widget-button-click (event)
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275 "Activate button below mouse pointer."
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276 (interactive "@e")
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277 (widget-button-press (event-point event) event))
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278
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279 (defun widget-button-press (pos &optional event)
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280 "Activate button at POS."
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281 (interactive "@d")
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282 (let* ((button (get-text-property pos 'button)))
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283 (if button
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284 (widget-apply button :action event)
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285 (call-interactively
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286 (lookup-key widget-global-map (this-command-keys))))))
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287
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288 (defun widget-forward (arg)
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289 "Move point to the next field or button.
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290 With optional ARG, move across that many fields."
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291 (interactive "p")
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292 (while (> arg 0)
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293 (setq arg (1- arg))
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294 (let ((next (cond ((get-text-property (point) 'button)
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295 (next-single-property-change (point) 'button))
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296 ((get-text-property (point) 'field)
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297 (next-single-property-change (point) 'field))
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298 (t
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299 (point)))))
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300 (if (null next) ; Widget extends to end. of buffer
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301 (setq next (point-min)))
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302 (let ((button (next-single-property-change next 'button))
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303 (field (next-single-property-change next 'field)))
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304 (cond ((or (get-text-property next 'button)
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305 (get-text-property next 'field))
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306 (goto-char next))
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307 ((and button field)
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308 (goto-char (min button field)))
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309 (button (goto-char button))
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310 (field (goto-char field))
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311 (t
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312 (let ((button (next-single-property-change (point-min) 'button))
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313 (field (next-single-property-change (point-min) 'field)))
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314 (cond ((and button field) (goto-char (min button field)))
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315 (button (goto-char button))
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316 (field (goto-char field))
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317 (t
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318 (error "No buttons or fields found")))))))))
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319 (while (< arg 0)
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320 (if (= (point-min) (point))
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321 (forward-char 1))
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322 (setq arg (1+ arg))
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323 (let ((previous (cond ((get-text-property (1- (point)) 'button)
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324 (previous-single-property-change (point) 'button))
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325 ((get-text-property (1- (point)) 'field)
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326 (previous-single-property-change (point) 'field))
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327 (t
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328 (point)))))
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329 (if (null previous) ; Widget extends to beg. of buffer
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330 (setq previous (point-max)))
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331 (let ((button (previous-single-property-change previous 'button))
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332 (field (previous-single-property-change previous 'field)))
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333 (cond ((and button field)
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334 (goto-char (max button field)))
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335 (button (goto-char button))
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336 (field (goto-char field))
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337 (t
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338 (let ((button (previous-single-property-change
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339 (point-max) 'button))
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340 (field (previous-single-property-change
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341 (point-max) 'field)))
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342 (cond ((and button field) (goto-char (max button field)))
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343 (button (goto-char button))
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344 (field (goto-char field))
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345 (t
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346 (error "No buttons or fields found"))))))))
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347 (let ((button (previous-single-property-change (point) 'button))
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348 (field (previous-single-property-change (point) 'field)))
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349 (cond ((and button field)
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350 (goto-char (max button field)))
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351 (button (goto-char button))
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352 (field (goto-char field)))))
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353 (let ((help-echo (or (get-text-property (point) 'button)
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354 (get-text-property (point) 'field))))
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355 (if (and help-echo (setq help-echo (widget-get help-echo :help-echo)))
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356 (message "%s" help-echo))))
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357
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358 (defun widget-backward (arg)
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359 "Move point to the previous field or button.
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360 With optional ARG, move across that many fields."
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361 (interactive "p")
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362 (widget-forward (- arg)))
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363
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364 ;;; Setting up the buffer.
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365
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366 (defvar widget-field-new nil)
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367 ;; List of all newly created editable fields in the buffer.
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368 (make-variable-buffer-local 'widget-field-new)
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369
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370 (defvar widget-field-list nil)
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371 ;; List of all editable fields in the buffer.
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372 (make-variable-buffer-local 'widget-field-list)
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373
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374 (defun widget-setup ()
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375 "Setup current buffer so editing string widgets works."
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376 (let ((inhibit-read-only t)
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377 field)
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378 (while widget-field-new
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379 (setq field (car widget-field-new)
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380 widget-field-new (cdr widget-field-new)
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381 widget-field-list (cons field widget-field-list))
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382 (let ((from (widget-get field :value-from))
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383 (to (widget-get field :value-to)))
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384 (widget-specify-field field from to)
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385 (move-marker from (1- from))
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386 (move-marker to (1+ to)))))
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387 (widget-clear-undo)
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|
388 ;; We need to maintain text properties and size of the editing fields.
|
|
|
389 (make-local-variable 'after-change-functions)
|
|
|
390 (if widget-field-list
|
|
|
391 (setq after-change-functions '(widget-after-change))
|
|
|
392 (setq after-change-functions nil)))
|
|
|
393
|
|
|
394 (defvar widget-field-last nil)
|
|
|
395 ;; Last field containing point.
|
|
|
396 (make-variable-buffer-local 'widget-field-last)
|
|
|
397
|
|
|
398 (defvar widget-field-was nil)
|
|
|
399 ;; The widget data before the change.
|
|
|
400 (make-variable-buffer-local 'widget-field-was)
|
|
|
401
|
|
|
402 (defun widget-field-find (pos)
|
|
|
403 ;; Find widget whose editing field is located at POS.
|
|
|
404 ;; Return nil if POS is not inside and editing field.
|
|
|
405 ;;
|
|
|
406 ;; This is only used in `widget-field-modified', since ordinarily
|
|
|
407 ;; you would just test the field property.
|
|
|
408 (let ((fields widget-field-list)
|
|
|
409 field found)
|
|
|
410 (while fields
|
|
|
411 (setq field (car fields)
|
|
|
412 fields (cdr fields))
|
|
|
413 (let ((from (widget-get field :value-from))
|
|
|
414 (to (widget-get field :value-to)))
|
|
|
415 (if (and from to (< from pos) (> to pos))
|
|
|
416 (setq fields nil
|
|
|
417 found field))))
|
|
|
418 found))
|
|
|
419
|
|
|
420 (defun widget-after-change (from to old)
|
|
|
421 ;; Adjust field size and text properties.
|
|
|
422 (condition-case nil
|
|
|
423 (let ((field (widget-field-find from))
|
|
|
424 (inhibit-read-only t))
|
|
|
425 (cond ((null field))
|
|
|
426 ((not (eq field (widget-field-find to)))
|
|
|
427 (message "Error: `widget-after-change' called on two fields"))
|
|
|
428 (t
|
|
|
429 (let ((size (widget-get field :size)))
|
|
|
430 (if size
|
|
|
431 (let ((begin (1+ (widget-get field :value-from)))
|
|
|
432 (end (1- (widget-get field :value-to))))
|
|
|
433 (widget-specify-field-update field begin end)
|
|
|
434 (cond ((< (- end begin) size)
|
|
|
435 ;; Field too small.
|
|
|
436 (save-excursion
|
|
|
437 (goto-char end)
|
|
|
438 (insert-char ?\ (- (+ begin size) end))))
|
|
|
439 ((> (- end begin) size)
|
|
|
440 ;; Field too large and
|
|
|
441 (if (or (< (point) (+ begin size))
|
|
|
442 (> (point) end))
|
|
|
443 ;; Point is outside extra space.
|
|
|
444 (setq begin (+ begin size))
|
|
|
445 ;; Point is within the extra space.
|
|
|
446 (setq begin (point)))
|
|
|
447 (save-excursion
|
|
|
448 (goto-char end)
|
|
|
449 (while (and (eq (preceding-char) ?\ )
|
|
|
450 (> (point) begin))
|
|
|
451 (delete-backward-char 1))))))
|
|
|
452 (widget-specify-field-update field from to)))
|
|
|
453 (widget-apply field :notify field))))
|
|
|
454 (error (debug))))
|
|
|
455
|
|
|
456 ;;; The `default' Widget.
|
|
|
457
|
|
|
458 (define-widget 'default nil
|
|
|
459 "Basic widget other widgets are derived from."
|
|
|
460 :value-to-internal (lambda (widget value) value)
|
|
|
461 :value-to-external (lambda (widget value) value)
|
|
|
462 :create 'widget-default-create
|
|
|
463 :format-handler 'widget-default-format-handler
|
|
|
464 :delete 'widget-default-delete
|
|
|
465 :value-set 'widget-default-value-set
|
|
|
466 :value-inline 'widget-default-value-inline
|
|
|
467 :menu-tag-get 'widget-default-menu-tag-get
|
|
|
468 :validate (lambda (widget) t)
|
|
|
469 :action 'widget-default-action
|
|
|
470 :notify 'widget-default-notify)
|
|
|
471
|
|
|
472 (defun widget-default-create (widget)
|
|
|
473 "Create WIDGET at point in the current buffer."
|
|
|
474 (widget-specify-insert
|
|
|
475 (let ((from (point))
|
|
|
476 (tag (widget-get widget :tag))
|
|
|
477 (doc (widget-get widget :doc))
|
|
|
478 button-begin button-end
|
|
|
479 doc-begin doc-end
|
|
|
480 value-pos)
|
|
|
481 (insert (widget-get widget :format))
|
|
|
482 (goto-char from)
|
|
|
483 ;; Parse % escapes in format.
|
|
|
484 (while (re-search-forward "%\\(.\\)" nil t)
|
|
|
485 (let ((escape (aref (match-string 1) 0)))
|
|
|
486 (replace-match "" t t)
|
|
|
487 (cond ((eq escape ?%)
|
|
|
488 (insert "%"))
|
|
|
489 ((eq escape ?\[)
|
|
|
490 (setq button-begin (point)))
|
|
|
491 ((eq escape ?\])
|
|
|
492 (setq button-end (point)))
|
|
|
493 ((eq escape ?t)
|
|
|
494 (if tag
|
|
|
495 (insert tag)
|
|
|
496 (let ((standard-output (current-buffer)))
|
|
|
497 (princ (widget-get widget :value)))))
|
|
|
498 ((eq escape ?d)
|
|
|
499 (when doc
|
|
|
500 (setq doc-begin (point))
|
|
|
501 (insert doc)
|
|
|
502 (while (eq (preceding-char) ?\n)
|
|
|
503 (delete-backward-char 1))
|
|
|
504 (insert "\n")
|
|
|
505 (setq doc-end (point))))
|
|
|
506 ((eq escape ?v)
|
|
|
507 (if (and button-begin (not button-end))
|
|
|
508 (widget-apply widget :value-create)
|
|
|
509 (setq value-pos (point))))
|
|
|
510 (t
|
|
|
511 (widget-apply widget :format-handler escape)))))
|
|
|
512 ;; Specify button and doc, and insert value.
|
|
|
513 (and button-begin button-end
|
|
|
514 (widget-specify-button widget button-begin button-end))
|
|
|
515 (and doc-begin doc-end
|
|
|
516 (widget-specify-doc widget doc-begin doc-end))
|
|
|
517 (when value-pos
|
|
|
518 (goto-char value-pos)
|
|
|
519 (widget-apply widget :value-create)))
|
|
|
520 (let ((from (copy-marker (point-min)))
|
|
|
521 (to (copy-marker (point-max))))
|
|
|
522 (widget-specify-text from to)
|
|
|
523 (set-marker-insertion-type from t)
|
|
|
524 (set-marker-insertion-type to nil)
|
|
|
525 (widget-put widget :from from)
|
|
|
526 (widget-put widget :to to))))
|
|
|
527
|
|
|
528 (defun widget-default-format-handler (widget escape)
|
|
|
529 ;; By default unknown escapes are errors.
|
|
|
530 (error "Unknown escape `%c'" escape))
|
|
|
531
|
|
|
532 (defun widget-default-delete (widget)
|
|
|
533 ;; Remove widget from the buffer.
|
|
|
534 (let ((from (widget-get widget :from))
|
|
|
535 (to (widget-get widget :to))
|
|
|
536 (inhibit-read-only t)
|
|
|
537 after-change-functions)
|
|
|
538 (widget-apply widget :value-delete)
|
|
|
539 (delete-region from to)
|
|
|
540 (set-marker from nil)
|
|
|
541 (set-marker to nil)))
|
|
|
542
|
|
|
543 (defun widget-default-value-set (widget value)
|
|
|
544 ;; Recreate widget with new value.
|
|
|
545 (save-excursion
|
|
|
546 (goto-char (widget-get widget :from))
|
|
|
547 (widget-apply widget :delete)
|
|
|
548 (widget-put widget :value value)
|
|
|
549 (widget-apply widget :create)))
|
|
|
550
|
|
|
551 (defun widget-default-value-inline (widget)
|
|
|
552 ;; Wrap value in a list unless it is inline.
|
|
|
553 (if (widget-get widget :inline)
|
|
|
554 (widget-value widget)
|
|
|
555 (list (widget-value widget))))
|
|
|
556
|
|
|
557 (defun widget-default-menu-tag-get (widget)
|
|
|
558 ;; Use tag or value for menus.
|
|
|
559 (or (widget-get widget :menu-tag)
|
|
|
560 (widget-get widget :tag)
|
|
|
561 (widget-princ-to-string (widget-get widget :value))))
|
|
|
562
|
|
|
563 (defun widget-default-action (widget &optional event)
|
|
|
564 ;; Notify the parent when a widget change
|
|
|
565 (let ((parent (widget-get widget :parent)))
|
|
|
566 (when parent
|
|
|
567 (widget-apply parent :notify widget event))))
|
|
|
568
|
|
|
569 (defun widget-default-notify (widget child &optional event)
|
|
|
570 ;; Pass notification to parent.
|
|
|
571 (widget-default-action widget event))
|
|
|
572
|
|
|
573 ;;; The `item' Widget.
|
|
|
574
|
|
|
575 (define-widget 'item 'default
|
|
|
576 "Constant items for inclusion in other widgets."
|
|
|
577 :convert-widget 'widget-item-convert-widget
|
|
|
578 :value-create 'widget-item-value-create
|
|
|
579 :value-delete 'ignore
|
|
|
580 :value-get 'widget-item-value-get
|
|
|
581 :match 'widget-item-match
|
|
|
582 :match-inline 'widget-item-match-inline
|
|
|
583 :action 'widget-item-action
|
|
|
584 :format "%t\n")
|
|
|
585
|
|
|
586 (defun widget-item-convert-widget (widget)
|
|
|
587 ;; Initialize :value and :tag from :args in WIDGET.
|
|
|
588 (let ((args (widget-get widget :args)))
|
|
|
589 (when args
|
|
|
590 (widget-put widget :value (car args))
|
|
|
591 (widget-put widget :args nil)))
|
|
|
592 widget)
|
|
|
593
|
|
|
594 (defun widget-item-value-create (widget)
|
|
|
595 ;; Insert the printed representation of the value.
|
|
|
596 (let ((standard-output (current-buffer)))
|
|
|
597 (princ (widget-get widget :value))))
|
|
|
598
|
|
|
599 (defun widget-item-match (widget value)
|
|
|
600 ;; Match if the value is the same.
|
|
|
601 (equal (widget-get widget :value) value))
|
|
|
602
|
|
|
603 (defun widget-item-match-inline (widget values)
|
|
|
604 ;; Match if the value is the same.
|
|
|
605 (let ((value (widget-get widget :value)))
|
|
|
606 (and (listp value)
|
|
|
607 (<= (length value) (length values))
|
|
|
608 (let ((head (subseq values 0 (length value))))
|
|
|
609 (and (equal head value)
|
|
|
610 (cons head (subseq values (length value))))))))
|
|
|
611
|
|
|
612 (defun widget-item-action (widget &optional event)
|
|
|
613 ;; Just notify itself.
|
|
|
614 (widget-apply widget :notify widget event))
|
|
|
615
|
|
|
616 (defun widget-item-value-get (widget)
|
|
|
617 ;; Items are simple.
|
|
|
618 (widget-get widget :value))
|
|
|
619
|
|
|
620 ;;; The `push' Widget.
|
|
|
621
|
|
|
622 (define-widget 'push 'item
|
|
|
623 "A pushable button."
|
|
|
624 :format "%[[%t]%]")
|
|
|
625
|
|
|
626 ;;; The `link' Widget.
|
|
|
627
|
|
|
628 (define-widget 'link 'item
|
|
|
629 "An embedded link."
|
|
|
630 :format "%[_%t_%]")
|
|
|
631
|
|
|
632 ;;; The `field' Widget.
|
|
|
633
|
|
|
634 (define-widget 'field 'default
|
|
|
635 "An editable text field."
|
|
|
636 :convert-widget 'widget-item-convert-widget
|
|
|
637 :format "%v"
|
|
|
638 :value ""
|
|
|
639 :tag "field"
|
|
|
640 :value-create 'widget-field-value-create
|
|
|
641 :value-delete 'widget-field-value-delete
|
|
|
642 :value-get 'widget-field-value-get
|
|
|
643 :match 'widget-field-match)
|
|
|
644
|
|
|
645 (defun widget-field-value-create (widget)
|
|
|
646 ;; Create an editable text field.
|
|
|
647 (insert " ")
|
|
|
648 (let ((size (widget-get widget :size))
|
|
|
649 (value (widget-get widget :value))
|
|
|
650 (from (point)))
|
|
|
651 (if (null size)
|
|
|
652 (insert value)
|
|
|
653 (insert value)
|
|
|
654 (if (< (length value) size)
|
|
|
655 (insert-char ?\ (- size (length value)))))
|
|
|
656 (unless (memq widget widget-field-list)
|
|
|
657 (setq widget-field-new (cons widget widget-field-new)))
|
|
|
658 (widget-put widget :value-from (copy-marker from))
|
|
|
659 (set-marker-insertion-type (widget-get widget :value-from) t)
|
|
|
660 (widget-put widget :value-to (copy-marker (point)))
|
|
|
661 (set-marker-insertion-type (widget-get widget :value-to) nil)
|
|
|
662 (if (null size)
|
|
|
663 (insert ?\n)
|
|
|
664 (insert ?\ ))))
|
|
|
665
|
|
|
666 (defun widget-field-value-delete (widget)
|
|
|
667 ;; Remove the widget from the list of active editing fields.
|
|
|
668 (setq widget-field-list (delq widget widget-field-list))
|
|
|
669 (set-marker (widget-get widget :value-from) nil)
|
|
|
670 (set-marker (widget-get widget :value-to) nil))
|
|
|
671
|
|
|
672 (defun widget-field-value-get (widget)
|
|
|
673 ;; Return current text in editing field.
|
|
|
674 (let ((from (widget-get widget :value-from))
|
|
|
675 (to (widget-get widget :value-to)))
|
|
|
676 (if (and from to)
|
|
|
677 (progn
|
|
|
678 (setq from (1+ from)
|
|
|
679 to (1- to))
|
|
|
680 (while (and (> to from)
|
|
|
681 (eq (char-after (1- to)) ?\ ))
|
|
|
682 (setq to (1- to)))
|
|
|
683 (buffer-substring-no-properties from to))
|
|
|
684 (widget-get widget :value))))
|
|
|
685
|
|
|
686 (defun widget-field-match (widget value)
|
|
|
687 ;; Match any string.
|
|
|
688 (stringp value))
|
|
|
689
|
|
|
690 ;;; The `choice' Widget.
|
|
|
691
|
|
|
692 (define-widget 'choice 'default
|
|
|
693 "A menu of options."
|
|
|
694 :convert-widget 'widget-choice-convert-widget
|
|
|
695 :format "%[%t%]: %v"
|
|
|
696 :tag "choice"
|
|
|
697 :inline t
|
|
|
698 :void '(item "void")
|
|
|
699 :value-create 'widget-choice-value-create
|
|
|
700 :value-delete 'widget-radio-value-delete
|
|
|
701 :value-get 'widget-choice-value-get
|
|
|
702 :value-inline 'widget-choice-value-inline
|
|
|
703 :action 'widget-choice-action
|
|
|
704 :error "Make a choice"
|
|
|
705 :validate 'widget-choice-validate
|
|
|
706 :match 'widget-choice-match
|
|
|
707 :match-inline 'widget-choice-match-inline)
|
|
|
708
|
|
|
709 (defun widget-choice-convert-widget (widget)
|
|
|
710 ;; Expand type args into widget objects.
|
|
|
711 (widget-put widget :args (mapcar 'widget-convert (widget-get widget :args)))
|
|
|
712 widget)
|
|
|
713
|
|
|
714 (defun widget-choice-value-create (widget)
|
|
|
715 ;; Insert the first choice that matches the value.
|
|
|
716 (let ((value (widget-get widget :value))
|
|
|
717 (args (widget-get widget :args))
|
|
|
718 current)
|
|
|
719 (while args
|
|
|
720 (setq current (car args)
|
|
|
721 args (cdr args))
|
|
|
722 (when (widget-apply current :match value)
|
|
|
723 (widget-put widget :children (list (widget-create current
|
|
|
724 :parent widget
|
|
|
725 :value value)))
|
|
|
726 (widget-put widget :choice current)
|
|
|
727 (setq args nil
|
|
|
728 current nil)))
|
|
|
729 (when current
|
|
|
730 (let ((void (widget-get widget :void)))
|
|
|
731 (widget-put widget :children (list (widget-create void
|
|
|
732 :parent widget
|
|
|
733 :value value)))
|
|
|
734 (widget-put widget :choice void)))))
|
|
|
735
|
|
|
736 (defun widget-choice-value-get (widget)
|
|
|
737 ;; Get value of the child widget.
|
|
|
738 (widget-value (car (widget-get widget :children))))
|
|
|
739
|
|
|
740 (defun widget-choice-value-inline (widget)
|
|
|
741 ;; Get value of the child widget.
|
|
|
742 (widget-apply (car (widget-get widget :children)) :value-inline))
|
|
|
743
|
|
|
744 (defun widget-choice-action (widget &optional event)
|
|
|
745 ;; Make a choice.
|
|
|
746 (let ((args (widget-get widget :args))
|
|
|
747 (old (widget-get widget :choice))
|
|
|
748 (tag (widget-apply widget :menu-tag-get))
|
|
|
749 current choices)
|
|
|
750 (setq current
|
|
|
751 (cond ((= (length args) 0)
|
|
|
752 nil)
|
|
|
753 ((= (length args) 1)
|
|
|
754 (nth 0 args))
|
|
|
755 ((and (= (length args) 2)
|
|
|
756 (memq old args))
|
|
|
757 (if (eq old (nth 0 args))
|
|
|
758 (nth 1 args)
|
|
|
759 (nth 0 args)))
|
|
|
760 (t
|
|
|
761 (while args
|
|
|
762 (setq current (car args)
|
|
|
763 args (cdr args))
|
|
|
764 (setq choices
|
|
|
765 (cons (cons (widget-apply current :menu-tag-get)
|
|
|
766 current)
|
|
|
767 choices)))
|
|
|
768 (cond
|
|
|
769 ((and event (fboundp 'x-popup-menu) window-system)
|
|
|
770 ;; We are in Emacs-19, pressed by the mouse
|
|
|
771 (x-popup-menu event
|
|
|
772 (list tag (cons "" (reverse choices)))))
|
|
|
773 ((and event (fboundp 'popup-menu) window-system)
|
|
|
774 ;; We are in XEmacs, pressed by the mouse
|
|
|
775 (let ((val (get-popup-menu-response
|
|
|
776 (cons ""
|
|
|
777 (mapcar
|
|
|
778 (function
|
|
|
779 (lambda (x)
|
|
|
780 (vector (car x) (list (car x)) t)))
|
|
|
781 (reverse choices))))))
|
|
|
782 (setq val (and val
|
|
|
783 (listp (event-object val))
|
|
|
784 (stringp (car-safe (event-object val)))
|
|
|
785 (car (event-object val))))
|
|
|
786 (cdr (assoc val choices))))
|
|
|
787 (t
|
|
|
788 (cdr (assoc (completing-read (concat tag ": ")
|
|
|
789 choices nil t)
|
|
|
790 choices)))))))
|
|
|
791 (when current
|
|
|
792 (widget-value-set widget (widget-value current))
|
|
|
793 (widget-setup)))
|
|
|
794 ;; Notify parent.
|
|
|
795 (widget-apply widget :notify widget event)
|
|
|
796 (widget-clear-undo))
|
|
|
797
|
|
|
798 (defun widget-choice-validate (widget)
|
|
|
799 ;; Valid if we have made a valid choice.
|
|
|
800 (let ((void (widget-get widget :void))
|
|
|
801 (choice (widget-get widget :choice))
|
|
|
802 (child (car (widget-get widget :children))))
|
|
|
803 (if (eq void choice)
|
|
|
804 widget
|
|
|
805 (widget-apply child :validate))))
|
|
|
806
|
|
|
807 (defun widget-choice-match (widget value)
|
|
|
808 ;; Matches if one of the choices matches.
|
|
|
809 (let ((args (widget-get widget :args))
|
|
|
810 current found)
|
|
|
811 (while (and args (not found))
|
|
|
812 (setq current (car args)
|
|
|
813 args (cdr args)
|
|
|
814 found (widget-apply current :match value)))
|
|
|
815 found))
|
|
|
816
|
|
|
817 (defun widget-choice-match-inline (widget values)
|
|
|
818 ;; Matches if one of the choices matches.
|
|
|
819 (let ((args (widget-get widget :args))
|
|
|
820 current found)
|
|
|
821 (while (and args (null found))
|
|
|
822 (setq current (car args)
|
|
|
823 args (cdr args)
|
|
|
824 found (widget-match-inline current values)))
|
|
|
825 found))
|
|
|
826
|
|
|
827 ;;; The `toggle' Widget.
|
|
|
828
|
|
|
829 (define-widget 'toggle 'choice
|
|
|
830 "Toggle between two states."
|
|
|
831 :convert-widget 'widget-toggle-convert-widget
|
|
|
832 :format "%[%v%]"
|
|
|
833 :on "on"
|
|
|
834 :off "off")
|
|
|
835
|
|
|
836 (defun widget-toggle-convert-widget (widget)
|
|
|
837 ;; Create the types representing the `on' and `off' states.
|
|
|
838 (let ((args (widget-get widget :args))
|
|
|
839 (on-type (widget-get widget :on-type))
|
|
|
840 (off-type (widget-get widget :off-type)))
|
|
|
841 (unless on-type
|
|
|
842 (setq on-type (list 'item :value t :tag (widget-get widget :on))))
|
|
|
843 (unless off-type
|
|
|
844 (setq off-type (list 'item :value nil :tag (widget-get widget :off))))
|
|
|
845 (widget-put widget :args (list on-type off-type)))
|
|
|
846 widget)
|
|
|
847
|
|
|
848 ;;; The `checkbox' Widget.
|
|
|
849
|
|
|
850 (define-widget 'checkbox 'toggle
|
|
|
851 "A checkbox toggle."
|
|
|
852 :convert-widget 'widget-item-convert-widget
|
|
|
853 :on-type '(item :format "[X]" t)
|
|
|
854 :off-type '(item :format "[ ]" nil))
|
|
|
855
|
|
|
856 ;;; The `checklist' Widget.
|
|
|
857
|
|
|
858 (define-widget 'checklist 'default
|
|
|
859 "A multiple choice widget."
|
|
|
860 :convert-widget 'widget-choice-convert-widget
|
|
|
861 :format "%v"
|
|
|
862 :entry-format "%b %v"
|
|
|
863 :menu-tag "checklist"
|
|
|
864 :value-create 'widget-checklist-value-create
|
|
|
865 :value-delete 'widget-radio-value-delete
|
|
|
866 :value-get 'widget-checklist-value-get
|
|
|
867 :validate 'widget-checklist-validate
|
|
|
868 :match 'widget-checklist-match
|
|
|
869 :match-inline 'widget-checklist-match-inline)
|
|
|
870
|
|
|
871 (defun widget-checklist-value-create (widget)
|
|
|
872 ;; Insert all values
|
|
|
873 (let ((alist (widget-checklist-match-find widget (widget-get widget :value)))
|
|
|
874 (args (widget-get widget :args)))
|
|
|
875 (while args
|
|
|
876 (widget-checklist-add-item widget (car args) (assq (car args) alist))
|
|
|
877 (setq args (cdr args)))
|
|
|
878 (widget-put widget :children (nreverse (widget-get widget :children)))))
|
|
|
879
|
|
|
880 (defun widget-checklist-add-item (widget type chosen)
|
|
|
881 ;; Create checklist item in WIDGET of type TYPE.
|
|
|
882 ;; If the item is checked, CHOSEN is a cons whose cdr is the value.
|
|
|
883 (widget-specify-insert
|
|
|
884 (let* ((children (widget-get widget :children))
|
|
|
885 (buttons (widget-get widget :buttons))
|
|
|
886 (from (point))
|
|
|
887 child button)
|
|
|
888 (insert (widget-get widget :entry-format))
|
|
|
889 (goto-char from)
|
|
|
890 ;; Parse % escapes in format.
|
|
|
891 (while (re-search-forward "%\\([bv%]\\)" nil t)
|
|
|
892 (let ((escape (aref (match-string 1) 0)))
|
|
|
893 (replace-match "" t t)
|
|
|
894 (cond ((eq escape ?%)
|
|
|
895 (insert "%"))
|
|
|
896 ((eq escape ?b)
|
|
|
897 (setq button (widget-create 'checkbox
|
|
|
898 :parent widget
|
|
|
899 :value (not (null chosen)))))
|
|
|
900 ((eq escape ?v)
|
|
|
901 (setq child
|
|
|
902 (cond ((not chosen)
|
|
|
903 (widget-create type :parent widget))
|
|
|
904 ((widget-get type :inline)
|
|
|
905 (widget-create type
|
|
|
906 :parent widget
|
|
|
907 :value (cdr chosen)))
|
|
|
908 (t
|
|
|
909 (widget-create type
|
|
|
910 :parent widget
|
|
|
911 :value (car (cdr chosen)))))))
|
|
|
912 (t
|
|
|
913 (error "Unknown escape `%c'" escape)))))
|
|
|
914 ;; Update properties.
|
|
|
915 (and button child (widget-put child :button button))
|
|
|
916 (and button (widget-put widget :buttons (cons button buttons)))
|
|
|
917 (and child (widget-put widget :children (cons child children))))))
|
|
|
918
|
|
|
919 (defun widget-checklist-match (widget values)
|
|
|
920 ;; All values must match a type in the checklist.
|
|
|
921 (and (listp values)
|
|
|
922 (null (cdr (widget-checklist-match-inline widget values)))))
|
|
|
923
|
|
|
924 (defun widget-checklist-match-inline (widget values)
|
|
|
925 ;; Find the values which match a type in the checklist.
|
|
|
926 (let ((greedy (widget-get widget :greedy))
|
|
|
927 (args (copy-list (widget-get widget :args)))
|
|
|
928 found rest)
|
|
|
929 (while values
|
|
|
930 (let ((answer (widget-checklist-match-up args values)))
|
|
|
931 (cond (answer
|
|
|
932 (let ((vals (widget-match-inline answer values)))
|
|
|
933 (setq found (append found (car vals))
|
|
|
934 values (cdr vals)
|
|
|
935 args (delq answer args))))
|
|
|
936 (greedy
|
|
|
937 (setq rest (append rest (list (car values)))
|
|
|
938 values (cdr values)))
|
|
|
939 (t
|
|
|
940 (setq rest (append rest values)
|
|
|
941 values nil)))))
|
|
|
942 (cons found rest)))
|
|
|
943
|
|
|
944 (defun widget-checklist-match-find (widget values)
|
|
|
945 ;; Find the values which match a type in the checklist.
|
|
|
946 ;; Return an alist of (TYPE MATCH).
|
|
|
947 (let ((greedy (widget-get widget :greedy))
|
|
|
948 (args (copy-list (widget-get widget :args)))
|
|
|
949 found)
|
|
|
950 (while values
|
|
|
951 (let ((answer (widget-checklist-match-up args values)))
|
|
|
952 (cond (answer
|
|
|
953 (let ((vals (widget-match-inline answer values)))
|
|
|
954 (setq found (cons (cons answer (car vals)) found)
|
|
|
955 values (cdr vals)
|
|
|
956 args (delq answer args))))
|
|
|
957 (greedy
|
|
|
958 (setq values (cdr values)))
|
|
|
959 (t
|
|
|
960 (setq values nil)))))
|
|
|
961 found))
|
|
|
962
|
|
|
963 (defun widget-checklist-match-up (args values)
|
|
|
964 ;; Rerturn the first type from ARGS that matches VALUES.
|
|
|
965 (let (current found)
|
|
|
966 (while (and args (null found))
|
|
|
967 (setq current (car args)
|
|
|
968 args (cdr args)
|
|
|
969 found (widget-match-inline current values)))
|
|
|
970 (and found current)))
|
|
|
971
|
|
|
972 (defun widget-checklist-value-get (widget)
|
|
|
973 ;; The values of all selected items.
|
|
|
974 (let ((children (widget-get widget :children))
|
|
|
975 child result)
|
|
|
976 (while children
|
|
|
977 (setq child (car children)
|
|
|
978 children (cdr children))
|
|
|
979 (if (widget-value (widget-get child :button))
|
|
|
980 (setq result (append result (widget-apply child :value-inline)))))
|
|
|
981 result))
|
|
|
982
|
|
|
983 (defun widget-checklist-validate (widget)
|
|
|
984 ;; Ticked chilren must be valid.
|
|
|
985 (let ((children (widget-get widget :children))
|
|
|
986 child button found)
|
|
|
987 (while (and children (not found))
|
|
|
988 (setq child (car children)
|
|
|
989 children (cdr children)
|
|
|
990 button (widget-get child :button)
|
|
|
991 found (and (widget-value button)
|
|
|
992 (widget-apply child :validate))))
|
|
|
993 found))
|
|
|
994
|
|
|
995 ;;; The `option' Widget
|
|
|
996
|
|
|
997 (define-widget 'option 'checklist
|
|
|
998 "An widget with an optional item."
|
|
|
999 :inline t)
|
|
|
1000
|
|
|
1001 ;;; The `choice-item' Widget.
|
|
|
1002
|
|
|
1003 (define-widget 'choice-item 'item
|
|
|
1004 "Button items that delegate action events to their parents."
|
|
|
1005 :action 'widget-choice-item-action
|
|
|
1006 :format "%[%t%]\n")
|
|
|
1007
|
|
|
1008 (defun widget-choice-item-action (widget &optional event)
|
|
|
1009 ;; Tell parent what happened.
|
|
|
1010 (widget-apply (widget-get widget :parent) :action event))
|
|
|
1011
|
|
|
1012 ;;; The `radio-button' Widget.
|
|
|
1013
|
|
|
1014 (define-widget 'radio-button 'toggle
|
|
|
1015 "A radio button for use in the `radio' widget."
|
|
|
1016 :format "%v"
|
|
|
1017 :notify 'widget-radio-button-notify
|
|
|
1018 :on-type '(choice-item :format "%[(*)%]" t)
|
|
|
1019 :off-type '(choice-item :format "%[( )%]" nil))
|
|
|
1020
|
|
|
1021 (defun widget-radio-button-notify (widget child &optional event)
|
|
|
1022 ;; Notify the parent.
|
|
|
1023 (widget-apply (widget-get widget :parent) :action widget event))
|
|
|
1024
|
|
|
1025 ;;; The `radio' Widget.
|
|
|
1026
|
|
|
1027 (define-widget 'radio 'default
|
|
|
1028 "Select one of multiple options."
|
|
|
1029 :convert-widget 'widget-choice-convert-widget
|
|
|
1030 :format "%v"
|
|
|
1031 :entry-format "%b %v"
|
|
|
1032 :menu-tag "radio"
|
|
|
1033 :value-create 'widget-radio-value-create
|
|
|
1034 :value-delete 'widget-radio-value-delete
|
|
|
1035 :value-get 'widget-radio-value-get
|
|
|
1036 :value-inline 'widget-radio-value-inline
|
|
|
1037 :value-set 'widget-radio-value-set
|
|
|
1038 :error "You must push one of the buttons"
|
|
|
1039 :validate 'widget-radio-validate
|
|
|
1040 :match 'widget-choice-match
|
|
|
1041 :match-inline 'widget-choice-match-inline
|
|
|
1042 :action 'widget-radio-action)
|
|
|
1043
|
|
|
1044 (defun widget-radio-value-create (widget)
|
|
|
1045 ;; Insert all values
|
|
|
1046 (let ((args (widget-get widget :args))
|
|
|
1047 (indent (widget-get widget :indent))
|
|
|
1048 arg)
|
|
|
1049 (while args
|
|
|
1050 (setq arg (car args)
|
|
|
1051 args (cdr args))
|
|
|
1052 (widget-radio-add-item widget arg)
|
|
|
1053 (and indent args (insert-char ?\ indent)))))
|
|
|
1054
|
|
|
1055 (defun widget-radio-add-item (widget type)
|
|
|
1056 "Add to radio widget WIDGET a new radio button item of type TYPE."
|
|
|
1057 (setq type (widget-convert type))
|
|
|
1058 (widget-specify-insert
|
|
|
1059 (let* ((value (widget-get widget :value))
|
|
|
1060 (children (widget-get widget :children))
|
|
|
1061 (buttons (widget-get widget :buttons))
|
|
|
1062 (from (point))
|
|
|
1063 (chosen (and (null (widget-get widget :choice))
|
|
|
1064 (widget-apply type :match value)))
|
|
|
1065 child button)
|
|
|
1066 (insert (widget-get widget :entry-format))
|
|
|
1067 (goto-char from)
|
|
|
1068 ;; Parse % escapes in format.
|
|
|
1069 (while (re-search-forward "%\\([bv%]\\)" nil t)
|
|
|
1070 (let ((escape (aref (match-string 1) 0)))
|
|
|
1071 (replace-match "" t t)
|
|
|
1072 (cond ((eq escape ?%)
|
|
|
1073 (insert "%"))
|
|
|
1074 ((eq escape ?b)
|
|
|
1075 (setq button (widget-create 'radio-button
|
|
|
1076 :parent widget
|
|
|
1077 :value (not (null chosen)))))
|
|
|
1078 ((eq escape ?v)
|
|
|
1079 (setq child (if chosen
|
|
|
1080 (widget-create type
|
|
|
1081 :parent widget
|
|
|
1082 :value value)
|
|
|
1083 (widget-create type :parent widget))))
|
|
|
1084 (t
|
|
|
1085 (error "Unknown escape `%c'" escape)))))
|
|
|
1086 ;; Update properties.
|
|
|
1087 (when chosen
|
|
|
1088 (widget-put widget :choice type))
|
|
|
1089 (when button
|
|
|
1090 (widget-put child :button button)
|
|
|
1091 (widget-put widget :buttons (nconc buttons (list button))))
|
|
|
1092 (when child
|
|
|
1093 (widget-put widget :children (nconc children (list child))))
|
|
|
1094 child)))
|
|
|
1095
|
|
|
1096 (defun widget-radio-value-delete (widget)
|
|
|
1097 ;; Delete the child widgets.
|
|
|
1098 (mapcar 'widget-delete (widget-get widget :children))
|
|
|
1099 (widget-put widget :children nil)
|
|
|
1100 (mapcar 'widget-delete (widget-get widget :buttons))
|
|
|
1101 (widget-put widget :buttons nil))
|
|
|
1102
|
|
|
1103 (defun widget-radio-value-get (widget)
|
|
|
1104 ;; Get value of the child widget.
|
|
|
1105 (let ((chosen (widget-radio-chosen widget)))
|
|
|
1106 (and chosen (widget-value chosen))))
|
|
|
1107
|
|
|
1108 (defun widget-radio-chosen (widget)
|
|
|
1109 "Return the widget representing the chosen radio button."
|
|
|
1110 (let ((children (widget-get widget :children))
|
|
|
1111 current found)
|
|
|
1112 (while children
|
|
|
1113 (setq current (car children)
|
|
|
1114 children (cdr children))
|
|
|
1115 (let* ((button (widget-get current :button))
|
|
|
1116 (value (widget-apply button :value-get)))
|
|
|
1117 (when value
|
|
|
1118 (setq found current
|
|
|
1119 children nil))))
|
|
|
1120 found))
|
|
|
1121
|
|
|
1122 (defun widget-radio-value-inline (widget)
|
|
|
1123 ;; Get value of the child widget.
|
|
|
1124 (let ((children (widget-get widget :children))
|
|
|
1125 current found)
|
|
|
1126 (while children
|
|
|
1127 (setq current (car children)
|
|
|
1128 children (cdr children))
|
|
|
1129 (let* ((button (widget-get current :button))
|
|
|
1130 (value (widget-apply button :value-get)))
|
|
|
1131 (when value
|
|
|
1132 (setq found (widget-apply current :value-inline)
|
|
|
1133 children nil))))
|
|
|
1134 found))
|
|
|
1135
|
|
|
1136 (defun widget-radio-value-set (widget value)
|
|
|
1137 ;; We can't just delete and recreate a radio widget, since children
|
|
|
1138 ;; can be added after the original creation and won't be recreated
|
|
|
1139 ;; by `:create'.
|
|
|
1140 (let ((children (widget-get widget :children))
|
|
|
1141 current found)
|
|
|
1142 (while children
|
|
|
1143 (setq current (car children)
|
|
|
1144 children (cdr children))
|
|
|
1145 (let* ((button (widget-get current :button))
|
|
|
1146 (match (and (not found)
|
|
|
1147 (widget-apply current :match value))))
|
|
|
1148 (widget-value-set button match)
|
|
|
1149 (if match
|
|
|
1150 (widget-value-set current value))
|
|
|
1151 (setq found (or found match))))))
|
|
|
1152
|
|
|
1153 (defun widget-radio-validate (widget)
|
|
|
1154 ;; Valid if we have made a valid choice.
|
|
|
1155 (let ((children (widget-get widget :children))
|
|
|
1156 current found button)
|
|
|
1157 (while (and children (not found))
|
|
|
1158 (setq current (car children)
|
|
|
1159 children (cdr children)
|
|
|
1160 button (widget-get current :button)
|
|
|
1161 found (widget-apply button :value-get)))
|
|
|
1162 (if found
|
|
|
1163 (widget-apply current :validate)
|
|
|
1164 widget)))
|
|
|
1165
|
|
|
1166 (defun widget-radio-action (widget child event)
|
|
|
1167 ;; Check if a radio button was pressed.
|
|
|
1168 (let ((children (widget-get widget :children))
|
|
|
1169 (buttons (widget-get widget :buttons))
|
|
|
1170 current)
|
|
|
1171 (when (memq child buttons)
|
|
|
1172 (while children
|
|
|
1173 (setq current (car children)
|
|
|
1174 children (cdr children))
|
|
|
1175 (let* ((button (widget-get current :button)))
|
|
|
1176 (cond ((eq child button)
|
|
|
1177 (widget-value-set button t))
|
|
|
1178 ((widget-value button)
|
|
|
1179 (widget-value-set button nil)))))))
|
|
|
1180 ;; Pass notification to parent.
|
|
|
1181 (widget-apply widget :notify child event))
|
|
|
1182
|
|
|
1183 ;;; The `insert-button' Widget.
|
|
|
1184
|
|
|
1185 (define-widget 'insert-button 'push
|
|
|
1186 "An insert button for the `repeat' widget."
|
|
|
1187 :tag "INS"
|
|
|
1188 :action 'widget-insert-button-action)
|
|
|
1189
|
|
|
1190 (defun widget-insert-button-action (widget &optional event)
|
|
|
1191 ;; Ask the parent to insert a new item.
|
|
|
1192 (widget-apply (widget-get widget :parent)
|
|
|
1193 :insert-before (widget-get widget :widget)))
|
|
|
1194
|
|
|
1195 ;;; The `delete-button' Widget.
|
|
|
1196
|
|
|
1197 (define-widget 'delete-button 'push
|
|
|
1198 "A delete button for the `repeat' widget."
|
|
|
1199 :tag "DEL"
|
|
|
1200 :action 'widget-delete-button-action)
|
|
|
1201
|
|
|
1202 (defun widget-delete-button-action (widget &optional event)
|
|
|
1203 ;; Ask the parent to insert a new item.
|
|
|
1204 (widget-apply (widget-get widget :parent)
|
|
|
1205 :delete-at (widget-get widget :widget)))
|
|
|
1206
|
|
|
1207 ;;; The `repeat' Widget.
|
|
|
1208
|
|
|
1209 (define-widget 'repeat 'default
|
|
|
1210 "A variable list of widgets of the same type."
|
|
|
1211 :convert-widget 'widget-choice-convert-widget
|
|
|
1212 :format "%v%i\n"
|
|
|
1213 :format-handler 'widget-repeat-format-handler
|
|
|
1214 :entry-format "%i %d %v"
|
|
|
1215 :menu-tag "repeat"
|
|
|
1216 :value-create 'widget-repeat-value-create
|
|
|
1217 :value-delete 'widget-radio-value-delete
|
|
|
1218 :value-get 'widget-repeat-value-get
|
|
|
1219 :validate 'widget-repeat-validate
|
|
|
1220 :match 'widget-repeat-match
|
|
|
1221 :match-inline 'widget-repeat-match-inline
|
|
|
1222 :insert-before 'widget-repeat-insert-before
|
|
|
1223 :delete-at 'widget-repeat-delete-at)
|
|
|
1224
|
|
|
1225 (defun widget-repeat-format-handler (widget escape)
|
|
|
1226 ;; We recognize the insert button.
|
|
|
1227 (cond ((eq escape ?i)
|
|
|
1228 (insert " ")
|
|
|
1229 (backward-char 1)
|
|
|
1230 (let* ((from (point))
|
|
|
1231 (button (widget-create (list 'insert-button
|
|
|
1232 :parent widget))))
|
|
|
1233 (widget-specify-button button from (point)))
|
|
|
1234 (forward-char 1))
|
|
|
1235 (t
|
|
|
1236 (widget-default-format-handler widget escape))))
|
|
|
1237
|
|
|
1238 (defun widget-repeat-value-create (widget)
|
|
|
1239 ;; Insert all values
|
|
|
1240 (let* ((value (widget-get widget :value))
|
|
|
1241 (type (nth 0 (widget-get widget :args)))
|
|
|
1242 (inlinep (widget-get type :inline))
|
|
|
1243 children)
|
|
|
1244 (widget-put widget :value-pos (copy-marker (point)))
|
|
|
1245 (set-marker-insertion-type (widget-get widget :value-pos) t)
|
|
|
1246 (while value
|
|
|
1247 (let ((answer (widget-match-inline type value)))
|
|
|
1248 (if answer
|
|
|
1249 (setq children (cons (widget-repeat-entry-create
|
|
|
1250 widget (if inlinep
|
|
|
1251 (car answer)
|
|
|
1252 (car (car answer))))
|
|
|
1253 children)
|
|
|
1254 value (cdr answer))
|
|
|
1255 (setq value nil))))
|
|
|
1256 (widget-put widget :children (nreverse children))))
|
|
|
1257
|
|
|
1258 (defun widget-repeat-value-get (widget)
|
|
|
1259 ;; Get value of the child widget.
|
|
|
1260 (apply 'append (mapcar (lambda (child) (widget-apply child :value-inline))
|
|
|
1261 (widget-get widget :children))))
|
|
|
1262
|
|
|
1263 (defun widget-repeat-validate (widget)
|
|
|
1264 ;; All the chilren must be valid.
|
|
|
1265 (let ((children (widget-get widget :children))
|
|
|
1266 child found)
|
|
|
1267 (while (and children (not found))
|
|
|
1268 (setq child (car children)
|
|
|
1269 children (cdr children)
|
|
|
1270 found (widget-apply child :validate)))
|
|
|
1271 found))
|
|
|
1272
|
|
|
1273 (defun widget-repeat-match (widget value)
|
|
|
1274 ;; Value must be a list and all the members must match the repeat type.
|
|
|
1275 (and (listp value)
|
|
|
1276 (null (cdr (widget-repeat-match-inline widget value)))))
|
|
|
1277
|
|
|
1278 (defun widget-repeat-match-inline (widget value)
|
|
|
1279 (let ((type (nth 0 (widget-get widget :args)))
|
|
|
1280 (ok t)
|
|
|
1281 found)
|
|
|
1282 (while (and value ok)
|
|
|
1283 (let ((answer (widget-match-inline type value)))
|
|
|
1284 (if answer
|
|
|
1285 (setq found (append found (car answer))
|
|
|
1286 value (cdr answer))
|
|
|
1287 (setq ok nil))))
|
|
|
1288 (cons found value)))
|
|
|
1289
|
|
|
1290 (defun widget-repeat-insert-before (widget before)
|
|
|
1291 ;; Insert a new child in the list of children.
|
|
|
1292 (save-excursion
|
|
|
1293 (let ((children (widget-get widget :children))
|
|
|
1294 (inhibit-read-only t)
|
|
|
1295 after-change-functions)
|
|
|
1296 (cond (before
|
|
|
1297 (goto-char (widget-get before :from)))
|
|
|
1298 (t
|
|
|
1299 (goto-char (widget-get widget :value-pos))))
|
|
|
1300 (let ((child (widget-repeat-entry-create
|
|
|
1301 widget (widget-get (nth 0 (widget-get widget :args))
|
|
|
1302 :value))))
|
|
|
1303 (widget-specify-text (widget-get child :from)
|
|
|
1304 (widget-get child :to))
|
|
|
1305 (if (eq (car children) before)
|
|
|
1306 (widget-put widget :children (cons child children))
|
|
|
1307 (while (not (eq (car (cdr children)) before))
|
|
|
1308 (setq children (cdr children)))
|
|
|
1309 (setcdr children (cons child (cdr children)))))))
|
|
|
1310 (widget-setup)
|
|
|
1311 (widget-apply widget :notify widget))
|
|
|
1312
|
|
|
1313 (defun widget-repeat-delete-at (widget child)
|
|
|
1314 ;; Delete child from list of children.
|
|
|
1315 (save-excursion
|
|
|
1316 (let ((buttons (copy-list (widget-get widget :buttons)))
|
|
|
1317 button
|
|
|
1318 (inhibit-read-only t)
|
|
|
1319 after-change-functions)
|
|
|
1320 (while buttons
|
|
|
1321 (setq button (car buttons)
|
|
|
1322 buttons (cdr buttons))
|
|
|
1323 (when (eq (widget-get button :widget) child)
|
|
|
1324 (widget-put widget
|
|
|
1325 :buttons (delq button (widget-get widget :buttons)))
|
|
|
1326 (widget-delete button))))
|
|
|
1327 (widget-delete child)
|
|
|
1328 (widget-put widget :children (delq child (widget-get widget :children))))
|
|
|
1329 (widget-setup)
|
|
|
1330 (widget-apply widget :notify widget))
|
|
|
1331
|
|
|
1332 (defun widget-repeat-entry-create (widget value)
|
|
|
1333 ;; Create a new entry to the list.
|
|
|
1334 (let ((type (nth 0 (widget-get widget :args)))
|
|
|
1335 (indent (widget-get widget :indent))
|
|
|
1336 child delete insert)
|
|
|
1337 (widget-specify-insert
|
|
|
1338 (save-excursion
|
|
|
1339 (insert (widget-get widget :entry-format))
|
|
|
1340 (if indent
|
|
|
1341 (insert-char ?\ indent)))
|
|
|
1342 ;; Parse % escapes in format.
|
|
|
1343 (while (re-search-forward "%\\(.\\)" nil t)
|
|
|
1344 (let ((escape (aref (match-string 1) 0)))
|
|
|
1345 (replace-match "" t t)
|
|
|
1346 (cond ((eq escape ?%)
|
|
|
1347 (insert "%"))
|
|
|
1348 ((eq escape ?i)
|
|
|
1349 (setq insert (widget-create 'insert-button
|
|
|
1350 :parent widget)))
|
|
|
1351 ((eq escape ?d)
|
|
|
1352 (setq delete (widget-create 'delete-button
|
|
|
1353 :parent widget)))
|
|
|
1354 ((eq escape ?v)
|
|
|
1355 (setq child (widget-create type
|
|
|
1356 :parent widget
|
|
|
1357 :value value)))
|
|
|
1358 (t
|
|
|
1359 (error "Unknown escape `%c'" escape)))))
|
|
|
1360 (widget-put widget
|
|
|
1361 :buttons (cons delete
|
|
|
1362 (cons insert
|
|
|
1363 (widget-get widget :buttons))))
|
|
|
1364 (move-marker (widget-get child :from) (point-min))
|
|
|
1365 (move-marker (widget-get child :to) (point-max)))
|
|
|
1366 (widget-put insert :widget child)
|
|
|
1367 (widget-put delete :widget child)
|
|
|
1368 child))
|
|
|
1369
|
|
|
1370 ;;; The `group' Widget.
|
|
|
1371
|
|
|
1372 (define-widget 'group 'default
|
|
|
1373 "A widget which group other widgets inside."
|
|
|
1374 :convert-widget 'widget-choice-convert-widget
|
|
|
1375 :format "%v"
|
|
|
1376 :value-create 'widget-group-value-create
|
|
|
1377 :value-delete 'widget-radio-value-delete
|
|
|
1378 :value-get 'widget-repeat-value-get
|
|
|
1379 :validate 'widget-repeat-validate
|
|
|
1380 :match 'widget-group-match
|
|
|
1381 :match-inline 'widget-group-match-inline)
|
|
|
1382
|
|
|
1383 (defun widget-group-value-create (widget)
|
|
|
1384 ;; Create each component.
|
|
|
1385 (let ((args (widget-get widget :args))
|
|
|
1386 (value (widget-get widget :value))
|
|
|
1387 (indent (widget-get widget :indent))
|
|
|
1388 arg answer children)
|
|
|
1389 (while args
|
|
|
1390 (setq arg (car args)
|
|
|
1391 args (cdr args)
|
|
|
1392 answer (widget-match-inline arg value)
|
|
|
1393 value (cdr answer)
|
|
|
1394 children (cons (cond ((null answer)
|
|
|
1395 (widget-create arg :parent widget))
|
|
|
1396 ((widget-get arg :inline)
|
|
|
1397 (widget-create arg
|
|
|
1398 :parent widget
|
|
|
1399 :value (car answer)))
|
|
|
1400 (t
|
|
|
1401 (widget-create arg
|
|
|
1402 :parent widget
|
|
|
1403 :value (car (car answer)))))
|
|
|
1404 children))
|
|
|
1405 (and args indent (insert-char ?\ indent)))
|
|
|
1406 (widget-put widget :children (nreverse children))))
|
|
|
1407
|
|
|
1408 (defun widget-group-match (widget values)
|
|
|
1409 ;; Match if the components match.
|
|
|
1410 (and (listp values)
|
|
|
1411 (null (cdr (widget-group-match-inline widget values)))))
|
|
|
1412
|
|
|
1413 (defun widget-group-match-inline (widget values)
|
|
|
1414 ;; Match if the components match.
|
|
|
1415 (let ((args (widget-get widget :args))
|
|
|
1416 (match t)
|
|
|
1417 arg answer found)
|
|
|
1418 (while args
|
|
|
1419 (setq arg (car args)
|
|
|
1420 args (cdr args)
|
|
|
1421 answer (widget-match-inline arg values))
|
|
|
1422 (if answer
|
|
|
1423 (setq values (cdr answer)
|
|
|
1424 found (append found (car answer)))
|
|
|
1425 (setq values nil)))
|
|
|
1426 (if answer
|
|
|
1427 (cons found values)
|
|
|
1428 nil)))
|
|
|
1429
|
|
|
1430 ;;; The Sexp Widgets.
|
|
|
1431
|
|
|
1432 (define-widget 'const 'item
|
|
|
1433 nil
|
|
|
1434 :format "%t\n")
|
|
|
1435
|
|
|
1436 (define-widget 'string 'field
|
|
|
1437 nil)
|
|
|
1438
|
|
|
1439 (define-widget 'file 'string
|
|
|
1440 nil
|
|
|
1441 :format "%[%t%]:%v"
|
|
|
1442 :tag "File"
|
|
|
1443 :action 'widget-file-action)
|
|
|
1444
|
|
|
1445 (defun widget-file-action (widget &optional event)
|
|
|
1446 nil
|
|
|
1447 ;; Read a file name from the minibuffer.
|
|
|
1448 (widget-value-set widget
|
|
|
1449 (read-file-name (widget-apply widget :menu-tag-get)
|
|
|
1450 (widget-get widget :directory)
|
|
|
1451 (widget-value widget)
|
|
|
1452 (widget-get widget :must-match)
|
|
|
1453 (widget-get widget :initial))))
|
|
|
1454
|
|
|
1455 (define-widget 'directory 'file
|
|
|
1456 nil
|
|
|
1457 :tag "Directory")
|
|
|
1458
|
|
|
1459 (define-widget 'symbol 'string
|
|
|
1460 nil
|
|
|
1461 :match (lambda (widget value) (symbolp value))
|
|
|
1462 :value-to-internal (lambda (widget value) (symbol-name value))
|
|
|
1463 :value-to-external (lambda (widget value) (intern value)))
|
|
|
1464
|
|
|
1465 (define-widget 'sexp 'string
|
|
|
1466 nil
|
|
|
1467 :validate 'widget-sexp-validate
|
|
|
1468 :match (lambda (widget value) t)
|
|
|
1469 :value-to-internal (lambda (widget value) (pp-to-string value))
|
|
|
1470 :value-to-external (lambda (widget value) (read value)))
|
|
|
1471
|
|
|
1472 (defun widget-sexp-validate (widget)
|
|
|
1473 ;; Valid if we can read the string and there is no junk left after it.
|
|
|
1474 (save-excursion
|
|
|
1475 (set-buffer (get-buffer-create " *Widget Scratch*"))
|
|
|
1476 (erase-buffer)
|
|
|
1477 (insert (widget-apply :value-get widget))
|
|
|
1478 (goto-char (point-min))
|
|
|
1479 (condition-case data
|
|
|
1480 (let ((value (read (current-buffer))))
|
|
|
1481 (if (eobp)
|
|
|
1482 (if (widget-apply widget :match value)
|
|
|
1483 t
|
|
|
1484 (widget-put widget :error (widget-get widget :type-error))
|
|
|
1485 nil)
|
|
|
1486 (widget-put widget
|
|
|
1487 :error (format "Junk at end of expression: %s"
|
|
|
1488 (buffer-substring (point) (point-max))))
|
|
|
1489 nil))
|
|
|
1490 (error (widget-put widget :error (error-message-string data))
|
|
|
1491 nil))))
|
|
|
1492
|
|
|
1493 (define-widget 'integer 'sexp
|
|
|
1494 nil
|
|
|
1495 :type-error "This field should contain an integer"
|
|
|
1496 :match (lambda (widget value) (integerp value)))
|
|
|
1497
|
|
|
1498 (define-widget 'number 'sexp
|
|
|
1499 nil
|
|
|
1500 :type-error "This field should contain a number"
|
|
|
1501 :match (lambda (widget value) (numberp value)))
|
|
|
1502
|
|
|
1503 (define-widget 'list 'group
|
|
|
1504 nil)
|
|
|
1505
|
|
|
1506 (define-widget 'vector 'group
|
|
|
1507 nil
|
|
|
1508 :match 'widget-vector-match
|
|
|
1509 :value-to-internal (lambda (widget value) (append value nil))
|
|
|
1510 :value-to-external (lambda (widget value) (apply 'vector value)))
|
|
|
1511
|
|
|
1512 (defun widget-vector-match (widget value)
|
|
|
1513 (and (vectorp value)
|
|
|
1514 (widget-group-match widget
|
|
|
1515 (widget-apply :value-to-internal widget value))))
|
|
|
1516
|
|
|
1517 (define-widget 'cons 'group
|
|
|
1518 nil
|
|
|
1519 :match 'widget-cons-match
|
|
|
1520 :value-to-internal (lambda (widget value)
|
|
|
1521 (list (car value) (cdr value)))
|
|
|
1522 :value-to-external (lambda (widget value)
|
|
|
1523 (cons (nth 0 value) (nth 1 value))))
|
|
|
1524
|
|
|
1525 (defun widget-cons-match (widget value)
|
|
|
1526 (and (consp value)
|
|
|
1527 (widget-group-match widget
|
|
|
1528 (widget-apply :value-to-internal widget value))))
|
|
|
1529
|
|
|
1530 ;;; The End:
|
|
|
1531
|
|
|
1532 (provide 'widget-edit)
|
|
|
1533
|
|
|
1534 ;; widget-edit.el ends here
|
