lisp/cus-theme.el

   1 ;;; cus-theme.el -- custom theme creation user interface
   2 ;;
   3 ;; Copyright (C) 2001, 2002, 2003, 2004, 2005,
   4 ;;   2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5 ;;
   6 ;; Author: Alex Schroeder <alex@gnu.org>
   7 ;; Maintainer: FSF
   8 ;; Keywords: help, faces
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 ;;; Code:
  26
  27 (require 'widget)
  28 (require 'cus-edit)
  29
  30 (eval-when-compile
  31   (require 'wid-edit))
  32
  33 (defvar custom-new-theme-mode-map
  34   (let ((map (make-keymap)))
  35     (set-keymap-parent map widget-keymap)
  36     (suppress-keymap map)
  37     (define-key map "n" 'widget-forward)
  38     (define-key map "p" 'widget-backward)
  39     map)
  40   "Keymap for `custom-new-theme-mode'.")
  41
  42 (define-derived-mode custom-new-theme-mode nil "New-Theme"
  43   "Major mode for the buffer created by `customize-create-theme'.
  44 Do not call this mode function yourself.  It is only meant for internal
  45 use by `customize-create-theme'."
  46   (use-local-map custom-new-theme-mode-map)
  47   (define-key custom-new-theme-mode-map [mouse-1] 'widget-move-and-invoke)
  48   (set (make-local-variable 'widget-documentation-face) 'custom-documentation)
  49   (set (make-local-variable 'widget-button-face) custom-button)
  50   (set (make-local-variable 'widget-button-pressed-face) custom-button-pressed)
  51   (set (make-local-variable 'widget-mouse-face) custom-button-mouse)
  52   (when custom-raised-buttons
  53     (set (make-local-variable 'widget-push-button-prefix) "")
  54     (set (make-local-variable 'widget-push-button-suffix) "")
  55     (set (make-local-variable 'widget-link-prefix) "")
  56     (set (make-local-variable 'widget-link-suffix) "")))
  57 (put 'custom-new-theme-mode 'mode-class 'special)
  58
  59 (defvar custom-theme-name nil)
  60 (defvar custom-theme-variables nil)
  61 (defvar custom-theme-faces nil)
  62 (defvar custom-theme-description)
  63 (defvar custom-theme-insert-variable-marker)
  64 (defvar custom-theme-insert-face-marker)
  65
  66 ;;;###autoload
  67 (defun customize-create-theme ()
  68   "Create a custom theme."
  69   (interactive)
  70   (switch-to-buffer (generate-new-buffer "*New Custom Theme*"))
  71   (let ((inhibit-read-only t))
  72     (erase-buffer))
  73   (custom-new-theme-mode)
  74   (make-local-variable 'custom-theme-name)
  75   (make-local-variable 'custom-theme-variables)
  76   (make-local-variable 'custom-theme-faces)
  77   (make-local-variable 'custom-theme-description)
  78   (make-local-variable 'custom-theme-insert-variable-marker)
  79   (make-local-variable 'custom-theme-insert-face-marker)
  80   (widget-insert "This buffer helps you write a custom theme elisp file.
  81 This will help you share your customizations with other people.
  82
  83 Insert the names of all variables and faces you want the theme to include.
  84 Invoke \"Save Theme\" to save the theme.  The theme file will be saved to
  85 the directory " custom-theme-directory "\n\n")
  86   (widget-create 'push-button
  87                  :tag "Visit Theme"
  88                  :help-echo "Insert the settings of a pre-defined theme."
  89                  :action (lambda (widget &optional event)
  90                            (call-interactively 'custom-theme-visit-theme)))
  91   (widget-insert "  ")
  92   (widget-create 'push-button
  93                  :tag "Merge Theme"
  94                  :help-echo "Merge in the settings of a pre-defined theme."
  95                  :action (lambda (widget &optional event)
  96                            (call-interactively 'custom-theme-merge-theme)))
  97   (widget-insert "  ")
  98   (widget-create 'push-button
  99                  :notify (lambda (&rest ignore)
 100                            (when (y-or-n-p "Discard current changes? ")
 101                              (kill-buffer (current-buffer))
 102                              (customize-create-theme)))
 103                  "Reset Buffer")
 104   (widget-insert "  ")
 105   (widget-create 'push-button
 106                  :notify (function custom-theme-write)
 107                  "Save Theme")
 108   (widget-insert "\n")
 109
 110   (widget-insert "\n\nTheme name: ")
 111   (setq custom-theme-name
 112         (widget-create 'editable-field
 113                        :size 10
 114                        user-login-name))
 115   (widget-insert "\n\nDocumentation:\n")
 116   (setq custom-theme-description
 117         (widget-create 'text
 118                        :value (format-time-string "Created %Y-%m-%d.")))
 119   (widget-insert "\n")
 120   (widget-create 'push-button
 121                  :tag "Insert Variable"
 122                  :help-echo "Add another variable to this theme."
 123                  :action (lambda (widget &optional event)
 124                            (call-interactively 'custom-theme-add-variable)))
 125   (widget-insert "\n")
 126   (setq custom-theme-insert-variable-marker (point-marker))
 127   (widget-insert "\n")
 128   (widget-create 'push-button
 129                  :tag "Insert Face"
 130                  :help-echo "Add another face to this theme."
 131                  :action (lambda (widget &optional event)
 132                            (call-interactively 'custom-theme-add-face)))
 133   (widget-insert "\n")
 134   (setq custom-theme-insert-face-marker (point-marker))
 135   (widget-insert "\n")
 136   (widget-create 'push-button
 137                  :notify (lambda (&rest ignore)
 138                            (when (y-or-n-p "Discard current changes? ")
 139                              (kill-buffer (current-buffer))
 140                              (customize-create-theme)))
 141                  "Reset Buffer")
 142   (widget-insert "  ")
 143   (widget-create 'push-button
 144                  :notify (function custom-theme-write)
 145                  "Save Theme")
 146   (widget-insert "\n")
 147   (widget-setup)
 148   (goto-char (point-min))
 149   (message ""))
 150
 151 ;;; Theme variables
 152
 153 (defun custom-theme-add-variable (symbol)
 154   (interactive "vVariable name: ")
 155   (cond ((assq symbol custom-theme-variables)
 156          (message "%s is already in the theme" (symbol-name symbol)))
 157         ((not (boundp symbol))
 158          (message "%s is not defined as a variable" (symbol-name symbol)))
 159         ((eq symbol 'custom-enabled-themes)
 160          (message "Custom theme cannot contain `custom-enabled-themes'"))
 161         (t
 162          (save-excursion
 163            (goto-char custom-theme-insert-variable-marker)
 164            (widget-insert "\n")
 165            (let ((widget (widget-create 'custom-variable
 166                                         :tag (custom-unlispify-tag-name symbol)
 167                                         :custom-level 0
 168                                         :action 'custom-theme-variable-action
 169                                         :custom-state 'unknown
 170                                         :value symbol)))
 171              (push (cons symbol widget) custom-theme-variables)
 172              (custom-magic-reset widget))
 173            (widget-setup)))))
 174
 175 (defvar custom-theme-variable-menu
 176   `(("Reset to Current" custom-redraw
 177      (lambda (widget)
 178        (and (boundp (widget-value widget))
 179             (memq (widget-get widget :custom-state)
 180                   '(themed modified changed)))))
 181     ("Reset to Theme Value" custom-variable-reset-theme
 182      (lambda (widget)
 183        (let ((theme  (intern (widget-value custom-theme-name)))
 184              (symbol (widget-value widget))
 185              found)
 186          (and (custom-theme-p theme)
 187               (dolist (setting (get theme 'theme-settings) found)
 188                 (if (and (eq (cadr setting) symbol)
 189                          (eq (car  setting) 'theme-value))
 190                     (setq found t)))))))
 191     ("---" ignore ignore)
 192     ("Delete" custom-theme-delete-variable nil))
 193   "Alist of actions for the `custom-variable' widget in Custom Theme Mode.
 194 See the documentation for `custom-variable'.")
 195
 196 (defun custom-theme-variable-action (widget &optional event)
 197   "Show the Custom Theme Mode menu for a `custom-variable' widget.
 198 Optional EVENT is the location for the menu."
 199   (let ((custom-variable-menu custom-theme-variable-menu))
 200     (custom-variable-action widget event)))
 201
 202 (defun custom-variable-reset-theme (widget)
 203   "Reset WIDGET to its value for the currently edited theme."
 204   (let ((theme  (intern (widget-value custom-theme-name)))
 205         (symbol (widget-value widget))
 206         found)
 207     (dolist (setting (get theme 'theme-settings))
 208       (if (and (eq (cadr setting) symbol)
 209                (eq (car  setting) 'theme-value))
 210           (setq found setting)))
 211     (widget-value-set (car (widget-get widget :children))
 212                       (nth 3 found)))
 213   (widget-put widget :custom-state 'themed)
 214   (custom-redraw-magic widget)
 215   (widget-setup))
 216
 217 (defun custom-theme-delete-variable (widget)
 218   (setq custom-theme-variables
 219         (assq-delete-all (widget-value widget) custom-theme-variables))
 220   (widget-delete widget))
 221
 222 ;;; Theme faces
 223
 224 (defun custom-theme-add-face (symbol)
 225   (interactive (list (read-face-name "Face name" nil nil)))
 226   (cond ((assq symbol custom-theme-faces)
 227          (message "%s is already in the theme" (symbol-name symbol)))
 228         ((not (facep symbol))
 229          (message "%s is not defined as a face" (symbol-name symbol)))
 230         (t
 231          (save-excursion
 232            (goto-char custom-theme-insert-face-marker)
 233            (widget-insert "\n")
 234            (let ((widget (widget-create 'custom-face
 235                                         :tag (custom-unlispify-tag-name symbol)
 236                                         :custom-level 0
 237                                         :action 'custom-theme-face-action
 238                                         :custom-state 'unknown
 239                                         :value symbol)))
 240              (push (cons symbol widget) custom-theme-faces)
 241              (custom-magic-reset widget)
 242              (widget-setup))))))
 243
 244 (defvar custom-theme-face-menu
 245   `(("Reset to Theme Value" custom-face-reset-theme
 246      (lambda (widget)
 247        (let ((theme  (intern (widget-value custom-theme-name)))
 248              (symbol (widget-value widget))
 249              found)
 250          (and (custom-theme-p theme)
 251               (dolist (setting (get theme 'theme-settings) found)
 252                 (if (and (eq (cadr setting) symbol)
 253                          (eq (car  setting) 'theme-face))
 254                     (setq found t)))))))
 255     ("---" ignore ignore)
 256     ("Delete" custom-theme-delete-face nil))
 257   "Alist of actions for the `custom-variable' widget in Custom Theme Mode.
 258 See the documentation for `custom-variable'.")
 259
 260 (defun custom-theme-face-action (widget &optional event)
 261   "Show the Custom Theme Mode menu for a `custom-face' widget.
 262 Optional EVENT is the location for the menu."
 263   (let ((custom-face-menu custom-theme-face-menu))
 264     (custom-face-action widget event)))
 265
 266 (defun custom-face-reset-theme (widget)
 267   "Reset WIDGET to its value for the currently edited theme."
 268   (let ((theme  (intern (widget-value custom-theme-name)))
 269         (symbol (widget-value widget))
 270         found)
 271     (dolist (setting (get theme 'theme-settings))
 272       (if (and (eq (cadr setting) symbol)
 273                (eq (car  setting) 'theme-face))
 274           (setq found setting)))
 275     (widget-value-set (car (widget-get widget :children))
 276                       (nth 3 found)))
 277   (widget-put widget :custom-state 'themed)
 278   (custom-redraw-magic widget)
 279   (widget-setup))
 280
 281 (defun custom-theme-delete-face (widget)
 282   (setq custom-theme-faces
 283         (assq-delete-all (widget-value widget) custom-theme-faces))
 284   (widget-delete widget))
 285
 286 ;;; Reading and writing
 287
 288 (defun custom-theme-visit-theme ()
 289   (interactive)
 290   (when (or (null custom-theme-variables)
 291             (if (y-or-n-p "Discard current changes? ")
 292                 (progn (customize-create-theme) t)))
 293     (let ((theme (call-interactively 'custom-theme-merge-theme)))
 294       (unless (eq theme 'user)
 295         (widget-value-set custom-theme-name (symbol-name theme)))
 296       (widget-value-set custom-theme-description
 297                         (or (get theme 'theme-documentation)
 298                             (format-time-string "Created %Y-%m-%d.")))
 299       (widget-setup))))
 300
 301 (defun custom-theme-merge-theme (theme)
 302   (interactive "SCustom theme name: ")
 303   (unless (eq theme 'user)
 304     (load-theme theme))
 305   (let ((settings (get theme 'theme-settings)))
 306     (dolist (setting settings)
 307       (if (eq (car setting) 'theme-value)
 308           (custom-theme-add-variable (cadr setting))
 309         (custom-theme-add-face (cadr setting)))))
 310   (disable-theme theme)
 311   theme)
 312
 313 (defun custom-theme-write (&rest ignore)
 314   (let* ((name (widget-value custom-theme-name))
 315          (filename (expand-file-name (concat name "-theme.el")
 316                                      custom-theme-directory))
 317          (doc (widget-value custom-theme-description))
 318          (vars custom-theme-variables)
 319          (faces custom-theme-faces))
 320     (cond ((or (string-equal name "")
 321               (string-equal name "user")
 322               (string-equal name "changed"))
 323            (error "Custom themes cannot be named `%s'" name))
 324           ((string-match " " name)
 325            (error "Custom theme names should not contain spaces"))
 326           ((if (file-exists-p filename)
 327                (not (y-or-n-p
 328                      (format "File %s exists.  Overwrite? " filename))))
 329            (error "Aborted")))
 330     (with-temp-buffer
 331       (emacs-lisp-mode)
 332       (unless (file-exists-p custom-theme-directory)
 333         (make-directory (file-name-as-directory custom-theme-directory) t))
 334       (setq buffer-file-name filename)
 335       (erase-buffer)
 336       (insert "(deftheme " name)
 337       (if doc (insert "\n  \"" doc "\""))
 338       (insert  ")\n")
 339       (custom-theme-write-variables name vars)
 340       (custom-theme-write-faces name faces)
 341       (insert "\n(provide-theme '" name ")\n")
 342       (save-buffer))
 343     (dolist (var vars)
 344       (widget-put (cdr var) :custom-state 'saved)
 345       (custom-redraw-magic (cdr var)))
 346     (dolist (face faces)
 347       (widget-put (cdr face) :custom-state 'saved)
 348       (custom-redraw-magic (cdr face)))))
 349
 350 (defun custom-theme-write-variables (theme vars)
 351   "Write a `custom-theme-set-variables' command for THEME.
 352 It includes all variables in list VARS."
 353   (when vars
 354     (let ((standard-output (current-buffer)))
 355       (princ "\n(custom-theme-set-variables\n")
 356       (princ " '")
 357       (princ theme)
 358       (princ "\n")
 359       (mapc (lambda (spec)
 360               (let* ((symbol (car spec))
 361                      (child (car-safe (widget-get (cdr spec) :children)))
 362                      (value (if child
 363                                 (widget-value child)
 364                               ;; For hidden widgets, use the standard value
 365                               (get symbol 'standard-value))))
 366                 (when (boundp symbol)
 367                   (unless (bolp)
 368                     (princ "\n"))
 369                   (princ " '(")
 370                   (prin1 symbol)
 371                   (princ " ")
 372                   (prin1 (custom-quote value))
 373                   (princ ")"))))
 374             vars)
 375       (if (bolp)
 376           (princ " "))
 377       (princ ")")
 378       (unless (looking-at "\n")
 379         (princ "\n")))))
 380
 381 (defun custom-theme-write-faces (theme faces)
 382   "Write a `custom-theme-set-faces' command for THEME.
 383 It includes all faces in list FACES."
 384   (when faces
 385     (let ((standard-output (current-buffer)))
 386       (princ "\n(custom-theme-set-faces\n")
 387       (princ " '")
 388       (princ theme)
 389       (princ "\n")
 390       (mapc (lambda (spec)
 391               (let* ((symbol (car spec))
 392                      (child (car-safe (widget-get (cdr spec) :children)))
 393                      (value (if child (widget-value child))))
 394                 (when (and (facep symbol) child)
 395                   (unless (bolp)
 396                     (princ "\n"))
 397                   (princ " '(")
 398                   (prin1 symbol)
 399                   (princ " ")
 400                   (prin1 value)
 401                   (princ ")"))))
 402             faces)
 403       (if (bolp)
 404           (princ " "))
 405       (princ ")")
 406       (unless (looking-at "\n")
 407         (princ "\n")))))
 408
 409 ;; arch-tag: cd6919bc-63af-410e-bae2-b6702e762344
 410 ;;; cus-theme.el ends here