Re: Customizing faces with `defcustom'

[Per Abrahamsen]

The cpp "faces" can be either true faces, or the special keyword
"invisible". 

2005-11-30  Per Abrahamsen  <address@hidden>

        * progmodes/cpp.el (cpp-face): New widget.
        (cpp-known-face, cpp-unknown-face, cpp-edit-list): Use it.

*** cpp.el.~1.28.~      2003-10-24 15:35:06.000000000 +0200
--- cpp.el      2005-11-30 10:11:27.000000000 +0100
***************
*** 57,70 ****
    :type 'file
    :group 'cpp)
  
  (defcustom cpp-known-face 'invisible
    "*Face used for known cpp symbols."
!   :type 'face
    :group 'cpp)
  
  (defcustom cpp-unknown-face 'highlight
    "*Face used for unknown cpp symbols."
!   :type 'face
    :group 'cpp)
  
  (defcustom cpp-face-type 'light
--- 57,75 ----
    :type 'file
    :group 'cpp)
  
+ 
+ (define-widget 'cpp-face 'lazy
+   "Either a face or the special symbol 'invisible'."
+   :type '(choice (const invisible) (face)))
+ 
  (defcustom cpp-known-face 'invisible
    "*Face used for known cpp symbols."
!   :type 'cpp-face
    :group 'cpp)
  
  (defcustom cpp-unknown-face 'highlight
    "*Face used for unknown cpp symbols."
!   :type 'cpp-face
    :group 'cpp)
  
  (defcustom cpp-face-type 'light
***************
*** 93,102 ****
  1. Face used for text that is `ifdef' the macro.
  2. Face used for text that is `ifndef' the macro.
  3. t, nil, or `both' depending on what text may be edited."
!   :type '(repeat (list string face face
!                      (choice (const t)
!                              (const nil)
!                              (const both))))
    :group 'cpp)
  
  (defvar cpp-overlay-list nil)
--- 98,109 ----
  1. Face used for text that is `ifdef' the macro.
  2. Face used for text that is `ifndef' the macro.
  3. t, nil, or `both' depending on what text may be edited."
!   :type '(repeat (list (string :tag "Macro") 
!                        (cpp-face :tag "True") 
!                        (cpp-face :tag "False")
!                      (choice (const :tag "True branch writable" t)
!                              (const :tag "false branch writeable" nil)
!                              (const :tag "Both branches writeable" both))))
    :group 'cpp)
  
  (defvar cpp-overlay-list nil)