code.delx.au - gnu-emacs/blob - lisp/emacs-lisp/eieio-custom.el

   1 ;;; eieio-custom.el -- eieio object customization  -*- lexical-binding:t -*-
   2
   3 ;; Copyright (C) 1999-2001, 2005, 2007-2015 Free Software Foundation,
   4 ;; Inc.
   5
   6 ;; Author: Eric M. Ludlam <zappo@gnu.org>
   7 ;; Old-Version: 0.2 (using "Version:" made Emacs think this is package
   8 ;;                   eieio-0.2).
   9 ;; Keywords: OO, lisp
  10 ;; Package: eieio
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28 ;;
  29 ;;   This contains support customization of eieio objects.  Enabling
  30 ;; your object to be customizable requires use of the slot attribute
  31 ;; `:custom'.
  32
  33 (require 'eieio)
  34 (require 'widget)
  35 (require 'wid-edit)
  36 (require 'custom)
  37
  38 ;;; Compatibility
  39
  40 ;; (eval-and-compile
  41 ;;   (if (featurep 'xemacs)
  42 ;;       (defalias 'eieio-overlay-lists (lambda () (list (extent-list))))
  43 ;;     (defalias 'eieio-overlay-lists 'overlay-lists)))
  44
  45 ;;; Code:
  46 (defclass eieio-widget-test-class nil
  47   ((a-string :initarg :a-string
  48              :initform "The moose is loose"
  49              :custom string
  50              :label "Amorphous String"
  51              :group (default foo)
  52              :documentation "A string for testing custom.
  53 This is the next line of documentation.")
  54    (listostuff :initarg :listostuff
  55                :initform ("1" "2" "3")
  56                :type list
  57                :custom (repeat (string :tag "Stuff"))
  58                :label "List of Strings"
  59                :group foo
  60                :documentation "A list of stuff.")
  61    (uninitialized :initarg :uninitialized
  62                   :type string
  63                   :custom string
  64                   :documentation "This slot is not initialized.
  65 Used to make sure that custom doesn't barf when it encounters one
  66 of these.")
  67    (a-number :initarg :a-number
  68              :initform 2
  69              :custom integer
  70              :documentation "A number of thingies."))
  71   "A class for testing the widget on.")
  72
  73 (defcustom eieio-widget-test (eieio-widget-test-class)
  74   "Test variable for editing an object."
  75   :type 'object
  76   :group 'eieio)
  77
  78 (defface eieio-custom-slot-tag-face '((((class color)
  79                                         (background dark))
  80                                        (:foreground "light blue"))
  81                                       (((class color)
  82                                         (background light))
  83                                        (:foreground "blue"))
  84                                       (t (:italic t)))
  85   "Face used for unpushable variable tags."
  86   :group 'custom-faces)
  87
  88 (defvar eieio-wo nil
  89   "Buffer local variable in object customize buffers for the current widget.")
  90 (defvar eieio-co nil
  91   "Buffer local variable in object customize buffers for the current obj.")
  92 (defvar eieio-cog nil
  93   "Buffer local variable in object customize buffers for the current group.")
  94
  95  (defvar eieio-custom-ignore-eieio-co nil
  96    "When true, all customizable slots of the current object are updated.
  97 Updates occur regardless of the current customization group.")
  98
  99 (define-widget 'object-slot 'group
 100   "Abstractly modify a single slot in an object."
 101   :tag "Slot"
 102   :format "%t %v%h\n"
 103   :convert-widget 'widget-types-convert-widget
 104   :value-create 'eieio-slot-value-create
 105   :value-get 'eieio-slot-value-get
 106   :value-delete 'widget-children-value-delete
 107   :validate 'widget-children-validate
 108   :match 'eieio-object-match ;; same
 109   )
 110
 111 (defun eieio-slot-value-create (widget)
 112   "Create the value of WIDGET."
 113   (let ((chil nil))
 114     (setq chil (cons
 115                 (widget-create-child-and-convert
 116                  widget (widget-get widget :childtype)
 117                  :tag ""
 118                  :value (widget-get widget :value))
 119                 chil))
 120     (widget-put widget :children chil)))
 121
 122 (defun eieio-slot-value-get (widget)
 123   "Get the value of WIDGET."
 124   (widget-value (car (widget-get widget :children))))
 125
 126 (defun eieio-custom-toggle-hide (widget)
 127   "Toggle visibility of WIDGET."
 128   (let ((vc (car (widget-get widget :children))))
 129     (cond ((eq (widget-get vc :eieio-custom-state) 'hidden)
 130            (widget-put vc :eieio-custom-state 'visible)
 131            (widget-put vc :value-face (widget-get vc :orig-face)))
 132           (t
 133            (widget-put vc :eieio-custom-state 'hidden)
 134            (widget-put vc :orig-face (widget-get vc :value-face))
 135            (widget-put vc :value-face 'invisible)
 136            ))
 137     (widget-value-set vc (widget-value vc))))
 138
 139 (defun eieio-custom-toggle-parent (widget &rest _)
 140   "Toggle visibility of parent of WIDGET.
 141 Optional argument IGNORE is an extraneous parameter."
 142   (eieio-custom-toggle-hide (widget-get widget :parent)))
 143
 144 (define-widget 'object-edit 'group
 145   "Abstractly modify a CLOS object."
 146   :tag "Object"
 147   :format "%v"
 148   :convert-widget 'widget-types-convert-widget
 149   :value-create 'eieio-object-value-create
 150   :value-get 'eieio-object-value-get
 151   :value-delete 'widget-children-value-delete
 152   :validate 'widget-children-validate
 153   :match 'eieio-object-match
 154   :clone-object-children nil
 155   )
 156
 157 (defun eieio-object-match (_widget _value)
 158   "Match info for WIDGET against VALUE."
 159   ;; Write me
 160   t)
 161
 162 (defun eieio-filter-slot-type (widget slottype)
 163   "Filter WIDGETs SLOTTYPE."
 164   (if (widget-get widget :clone-object-children)
 165       slottype
 166     (cond ((eq slottype 'object)
 167            'object-edit)
 168           ((and (listp slottype)
 169                 (eq (car slottype) 'object))
 170            (cons 'object-edit (cdr slottype)))
 171           ((equal slottype '(repeat object))
 172            '(repeat object-edit))
 173           ((and (listp slottype)
 174                 (equal (car slottype) 'repeat)
 175                 (listp (car (cdr slottype)))
 176                 (equal (car (car (cdr slottype))) 'object))
 177            (list 'repeat
 178                  (cons 'object-edit
 179                        (cdr (car (cdr slottype))))))
 180           (t slottype))))
 181
 182 (defun eieio-object-value-create (widget)
 183   "Create the value of WIDGET."
 184   (if (not (widget-get widget :value))
 185       (widget-put widget
 186                   :value (cond ((widget-get widget :objecttype)
 187                                 (funcall (eieio--class-constructor
 188                                           (widget-get widget :objecttype))
 189                                          "Custom-new"))
 190                                ((widget-get widget :objectcreatefcn)
 191                                 (funcall (widget-get widget :objectcreatefcn)))
 192                                (t (error "No create method specified")))))
 193   (let* ((chil nil)
 194          (obj (widget-get widget :value))
 195          (master-group (widget-get widget :eieio-group))
 196          (cv (eieio--object-class-object obj))
 197          (slots (eieio--class-public-a cv))
 198          (flabel (eieio--class-public-custom-label cv))
 199          (fgroup (eieio--class-public-custom-group cv))
 200          (fdoc (eieio--class-public-doc cv))
 201          (fcust (eieio--class-public-custom cv)))
 202     ;; First line describes the object, but may not editable.
 203     (if (widget-get widget :eieio-show-name)
 204         (setq chil (cons (widget-create-child-and-convert
 205                           widget 'string :tag "Object "
 206                           :sample-face 'bold
 207                           (eieio-object-name-string obj))
 208                          chil)))
 209     ;; Display information about the group being shown
 210     (when master-group
 211       (let ((groups (eieio--class-option (eieio--object-class-object obj)
 212                                          :custom-groups)))
 213         (widget-insert "Groups:")
 214         (while groups
 215           (widget-insert "  ")
 216           (if (eq (car groups) master-group)
 217               (widget-insert "*" (capitalize (symbol-name master-group)) "*")
 218             (widget-create 'push-button
 219                            :thing (cons obj (car groups))
 220                            :notify (lambda (widget &rest _)
 221                                      (eieio-customize-object
 222                                       (car (widget-get widget :thing))
 223                                       (cdr (widget-get widget :thing))))
 224                            (capitalize (symbol-name (car groups)))))
 225           (setq groups (cdr groups)))
 226         (widget-insert "\n\n")))
 227     ;; Loop over all the slots, creating child widgets.
 228     (while slots
 229       ;; Output this slot if it has a customize flag associated with it.
 230       (when (and (car fcust)
 231                  (or (not master-group) (member master-group (car fgroup)))
 232                  (slot-boundp obj (car slots)))
 233         ;; In this case, this slot has a custom type.  Create its
 234         ;; children widgets.
 235         (let ((type (eieio-filter-slot-type widget (car fcust)))
 236               (stuff nil))
 237           ;; This next bit is an evil hack to get some EDE functions
 238           ;; working the way I like.
 239           (if (and (listp type)
 240                    (setq stuff (member :slotofchoices type)))
 241               (let ((choices (eieio-oref obj (car (cdr stuff))))
 242                     (newtype nil))
 243                 (while (not (eq (car type) :slotofchoices))
 244                   (setq newtype (cons (car type) newtype)
 245                         type (cdr type)))
 246                 (while choices
 247                   (setq newtype (cons (list 'const (car choices))
 248                                       newtype)
 249                         choices (cdr choices)))
 250                 (setq type (nreverse newtype))))
 251           (setq chil (cons (widget-create-child-and-convert
 252                             widget 'object-slot
 253                             :childtype type
 254                             :sample-face 'eieio-custom-slot-tag-face
 255                             :tag
 256                             (concat
 257                              (make-string
 258                               (or (widget-get widget :indent) 0)
 259                               ? )
 260                              (if (car flabel)
 261                                  (car flabel)
 262                                (let ((s (symbol-name
 263                                          (or
 264                                           (eieio--class-slot-initarg
 265                                            (eieio--object-class-object obj)
 266                                            (car slots))
 267                                           (car slots)))))
 268                                  (capitalize
 269                                   (if (string-match "^:" s)
 270                                       (substring s (match-end 0))
 271                                     s)))))
 272                             :value (slot-value obj (car slots))
 273                             :doc  (if (car fdoc) (car fdoc)
 274                                     "Slot not Documented.")
 275                             :eieio-custom-visibility 'visible
 276                             )
 277                            chil))
 278           )
 279         )
 280       (setq slots (cdr slots)
 281             fdoc (cdr fdoc)
 282             fcust (cdr fcust)
 283             flabel (cdr flabel)
 284             fgroup (cdr fgroup)))
 285     (widget-put widget :children (nreverse chil))
 286     ))
 287
 288 (defun eieio-object-value-get (widget)
 289   "Get the value of WIDGET."
 290   (let* ((obj (widget-get widget :value))
 291          (master-group eieio-cog)
 292          (cv (eieio--object-class-object obj))
 293          (fgroup (eieio--class-public-custom-group cv))
 294          (wids (widget-get widget :children))
 295          (name (if (widget-get widget :eieio-show-name)
 296                    (car (widget-apply (car wids) :value-inline))
 297                  nil))
 298          (chil (if (widget-get widget :eieio-show-name)
 299                    (nthcdr 1 wids) wids))
 300          (cv (eieio--object-class-object obj))
 301          (slots (eieio--class-public-a cv))
 302          (fcust (eieio--class-public-custom cv)))
 303     ;; If there are any prefix widgets, clear them.
 304     ;; -- None yet
 305     ;; Create a batch of initargs for each slot.
 306     (while (and slots chil)
 307       (if (and (car fcust)
 308                (or eieio-custom-ignore-eieio-co
 309                    (not master-group) (member master-group (car fgroup)))
 310                (slot-boundp obj (car slots)))
 311           (progn
 312             ;; Only customized slots have widgets
 313             (let ((eieio-custom-ignore-eieio-co t))
 314               (eieio-oset obj (car slots)
 315                           (car (widget-apply (car chil) :value-inline))))
 316             (setq chil (cdr chil))))
 317       (setq slots (cdr slots)
 318             fgroup (cdr fgroup)
 319             fcust (cdr fcust)))
 320     ;; Set any name updates on it.
 321     (if name (eieio-object-set-name-string obj name))
 322     ;; This is the same object we had before.
 323     obj))
 324
 325 (cl-defmethod eieio-done-customizing ((_obj eieio-default-superclass))
 326   "When applying change to a widget, call this method.
 327 This method is called by the default widget-edit commands.
 328 User made commands should also call this method when applying changes.
 329 Argument OBJ is the object that has been customized."
 330   nil)
 331
 332 ;;;###autoload
 333 (defun customize-object (obj &optional group)
 334   "Customize OBJ in a custom buffer.
 335 Optional argument GROUP is the sub-group of slots to display."
 336   (eieio-customize-object obj group))
 337
 338 (defvar eieio-custom-mode-map
 339   (let ((map (make-sparse-keymap)))
 340     (set-keymap-parent map widget-keymap)
 341     map)
 342   "Keymap for EIEIO Custom mode")
 343
 344 (define-derived-mode eieio-custom-mode fundamental-mode "EIEIO Custom"
 345   "Major mode for customizing EIEIO objects.
 346 \\{eieio-custom-mode-map}")
 347
 348 (cl-defmethod eieio-customize-object ((obj eieio-default-superclass)
 349                                    &optional group)
 350   "Customize OBJ in a specialized custom buffer.
 351 To override call the `eieio-custom-widget-insert' to just insert the
 352 object widget.
 353 Optional argument GROUP specifies a subgroup of slots to edit as a symbol.
 354 These groups are specified with the `:group' slot flag."
 355   ;; Insert check for multiple edits here.
 356   (let* ((g (or group 'default)))
 357     (switch-to-buffer (get-buffer-create
 358                        (concat "*CUSTOMIZE "
 359                                (eieio-object-name obj) " "
 360                                (symbol-name g) "*")))
 361     (setq buffer-read-only nil)
 362     (kill-all-local-variables)
 363     (eieio-custom-mode)
 364     (erase-buffer)
 365     (let ((all (overlay-lists)))
 366       ;; Delete all the overlays.
 367       (mapc 'delete-overlay (car all))
 368       (mapc 'delete-overlay (cdr all)))
 369     ;; Add an apply reset option at the top of the buffer.
 370     (eieio-custom-object-apply-reset obj)
 371     (widget-insert "\n\n")
 372     (widget-insert "Edit object " (eieio-object-name obj) "\n\n")
 373     ;; Create the widget editing the object.
 374     (make-local-variable 'eieio-wo)
 375     (setq eieio-wo (eieio-custom-widget-insert obj :eieio-group g))
 376     ;;Now generate the apply buttons
 377     (widget-insert "\n")
 378     (eieio-custom-object-apply-reset obj)
 379     ;; Now initialize the buffer
 380     (widget-setup)
 381     ;;(widget-minor-mode)
 382     (goto-char (point-min))
 383     (widget-forward 3)
 384     (make-local-variable 'eieio-co)
 385     (setq eieio-co obj)
 386     (make-local-variable 'eieio-cog)
 387     (setq eieio-cog g)))
 388
 389 (cl-defmethod eieio-custom-object-apply-reset ((_obj eieio-default-superclass))
 390   "Insert an Apply and Reset button into the object editor.
 391 Argument OBJ is the object being customized."
 392   (widget-create 'push-button
 393                  :notify (lambda (&rest _)
 394                            (widget-apply eieio-wo :value-get)
 395                            (eieio-done-customizing eieio-co)
 396                            (bury-buffer))
 397                  "Accept")
 398   (widget-insert "   ")
 399   (widget-create 'push-button
 400                  :notify (lambda (&rest _)
 401                            ;; I think the act of getting it sets
 402                            ;; its value through the get function.
 403                            (message "Applying Changes...")
 404                            (widget-apply eieio-wo :value-get)
 405                            (eieio-done-customizing eieio-co)
 406                            (message "Applying Changes...Done"))
 407                  "Apply")
 408   (widget-insert "   ")
 409   (widget-create 'push-button
 410                  :notify (lambda (&rest _)
 411                            (message "Resetting")
 412                            (eieio-customize-object eieio-co eieio-cog))
 413                  "Reset")
 414   (widget-insert "   ")
 415   (widget-create 'push-button
 416                  :notify (lambda (&rest _)
 417                            (bury-buffer))
 418                  "Cancel"))
 419
 420 (cl-defmethod eieio-custom-widget-insert ((obj eieio-default-superclass)
 421                                        &rest flags)
 422   "Insert the widget used for editing object OBJ in the current buffer.
 423 Arguments FLAGS are widget compatible flags.
 424 Must return the created widget."
 425   (apply 'widget-create 'object-edit :value obj flags))
 426
 427 (define-widget 'object 'object-edit
 428   "Instance of a CLOS class."
 429   :format "%{%t%}:\n%v"
 430   :value-to-internal 'eieio-object-value-to-abstract
 431   :value-to-external 'eieio-object-abstract-to-value
 432   :clone-object-children t
 433   )
 434
 435 (defun eieio-object-value-to-abstract (_widget value)
 436   "For WIDGET, convert VALUE to an abstract /safe/ representation."
 437   (if (eieio-object-p value) value))
 438
 439 (defun eieio-object-abstract-to-value (_widget value)
 440   "For WIDGET, convert VALUE from an abstract /safe/ representation."
 441   value)
 442
 443 \f
 444 ;;; customization group functions
 445 ;;
 446 ;; These functions provide the ability to create dynamic menus to
 447 ;; customize specific sections of an object.  They do not hook directly
 448 ;; into a filter, but can be used to create easymenu vectors.
 449 (cl-defmethod eieio-customize-object-group ((obj eieio-default-superclass))
 450   "Create a list of vectors for customizing sections of OBJ."
 451   (mapcar (lambda (group)
 452             (vector (concat "Group " (symbol-name group))
 453                     (list 'customize-object obj (list 'quote group))
 454                     t))
 455           (eieio--class-option (eieio--object-class-object obj) :custom-groups)))
 456
 457 (defvar eieio-read-custom-group-history nil
 458   "History for the custom group reader.")
 459
 460 (cl-defmethod eieio-read-customization-group ((obj eieio-default-superclass))
 461   "Do a completing read on the name of a customization group in OBJ.
 462 Return the symbol for the group, or nil"
 463   (let ((g (eieio--class-option (eieio--object-class-object obj)
 464                                 :custom-groups)))
 465     (if (= (length g) 1)
 466         (car g)
 467       ;; Make the association list
 468       (setq g (mapcar (lambda (g) (cons (symbol-name g) g)) g))
 469       (cdr (assoc
 470             (completing-read (concat (oref obj name)  " Custom Group: ")
 471                              g nil t nil 'eieio-read-custom-group-history)
 472             g)))))
 473
 474 (provide 'eieio-custom)
 475
 476 ;; Local variables:
 477 ;; generated-autoload-file: "eieio.el"
 478 ;; End:
 479
 480 ;;; eieio-custom.el ends here