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774 lines
30 KiB
EmacsLisp
774 lines
30 KiB
EmacsLisp
;;; facemenu.el --- create a face menu for interactively adding fonts to text
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;; Copyright (C) 1994, 1995, 1996, 2001, 2002, 2003, 2004,
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;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
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;; Author: Boris Goldowsky <boris@gnu.org>
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;; Keywords: faces
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This file defines a menu of faces (bold, italic, etc) which allows you to
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;; set the face used for a region of the buffer. Some faces also have
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;; keybindings, which are shown in the menu.
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;;
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;; The menu also contains submenus for indentation and justification-changing
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;; commands.
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;;; Usage:
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;; Selecting a face from the menu or typing the keyboard equivalent will
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;; change the region to use that face. If you use transient-mark-mode and the
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;; region is not active, the face will be remembered and used for the next
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;; insertion. It will be forgotten if you move point or make other
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;; modifications before inserting or typing anything.
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;;
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;; Faces can be selected from the keyboard as well.
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;; The standard keybindings are M-o (or ESC o) + letter:
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;; M-o i = "set italic", M-o b = "set bold", etc.
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;;; Customization:
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;; An alternative set of keybindings that may be easier to type can be set up
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;; using "Alt" or "Hyper" keys. This requires that you either have or create
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;; an Alt or Hyper key on your keyboard. On my keyboard, there is a key
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;; labeled "Alt", but to make it act as an Alt key I have to put this command
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;; into my .xinitrc:
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;; xmodmap -e "add Mod3 = Alt_L"
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;; Or, I can make it into a Hyper key with this:
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;; xmodmap -e "keysym Alt_L = Hyper_L" -e "add Mod2 = Hyper_L"
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;; Check with local X-perts for how to do it on your system.
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;; Then you can define your keybindings with code like this in your .emacs:
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;; (setq facemenu-keybindings
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;; '((default . [?\H-d])
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;; (bold . [?\H-b])
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;; (italic . [?\H-i])
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;; (bold-italic . [?\H-l])
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;; (underline . [?\H-u])))
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;; (facemenu-update)
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;; (setq facemenu-keymap global-map)
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;; (define-key global-map [?\H-c] 'facemenu-set-foreground) ; set fg color
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;; (define-key global-map [?\H-C] 'facemenu-set-background) ; set bg color
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;;
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;; The order of the faces that appear in the menu and their keybindings can be
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;; controlled by setting the variables `facemenu-keybindings' and
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;; `facemenu-new-faces-at-end'. List faces that you want to use in documents
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;; in `facemenu-listed-faces'.
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;;; Known Problems:
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;; Bold and Italic do not combine to create bold-italic if you select them
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;; both, although most other combinations (eg bold + underline + some color)
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;; do the intuitive thing.
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;;
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;; There is at present no way to display what the faces look like in
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;; the menu itself.
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;;
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;; `list-faces-display' shows the faces in a different order than
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;; this menu, which could be confusing. I do /not/ sort the list
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;; alphabetically, because I like the default order: it puts the most
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;; basic, common fonts first.
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;;
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;; Please send me any other problems, comments or ideas.
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;;; Code:
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(eval-when-compile
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(require 'help)
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(require 'button))
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;; Global bindings:
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(define-key global-map [C-down-mouse-2] 'facemenu-menu)
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(define-key global-map "\M-o" 'facemenu-keymap)
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(defgroup facemenu nil
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"Create a face menu for interactively adding fonts to text."
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:group 'faces
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:prefix "facemenu-")
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(defcustom facemenu-keybindings
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'((default . "d")
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(bold . "b")
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(italic . "i")
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(bold-italic . "l") ; {bold} intersect {italic} = {l}
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(underline . "u"))
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"Alist of interesting faces and keybindings.
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Each element is itself a list: the car is the name of the face,
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the next element is the key to use as a keyboard equivalent of the menu item;
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the binding is made in `facemenu-keymap'.
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The faces specifically mentioned in this list are put at the top of
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the menu, in the order specified. All other faces which are defined
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in `facemenu-listed-faces' are listed after them, but get no
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keyboard equivalents.
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If you change this variable after loading facemenu.el, you will need to call
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`facemenu-update' to make it take effect."
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:type '(repeat (cons face string))
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:group 'facemenu)
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(defcustom facemenu-new-faces-at-end t
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"Where in the menu to insert newly-created faces.
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This should be nil to put them at the top of the menu, or t to put them
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just before \"Other\" at the end."
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:type 'boolean
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:group 'facemenu)
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(defvar facemenu-unlisted-faces
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`(modeline region secondary-selection highlight scratch-face
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,(purecopy "^font-lock-") ,(purecopy "^gnus-") ,(purecopy "^message-")
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,(purecopy "^ediff-") ,(purecopy "^term-") ,(purecopy "^vc-")
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,(purecopy "^widget-") ,(purecopy "^custom-") ,(purecopy "^vm-"))
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"*List of faces that are of no interest to the user.")
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(make-obsolete-variable 'facemenu-unlisted-faces 'facemenu-listed-faces
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"22.1,\n and has no effect on the Face menu")
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(defcustom facemenu-listed-faces nil
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"List of faces to include in the Face menu.
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Each element should be a symbol, the name of a face.
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The \"basic \" faces in `facemenu-keybindings' are automatically
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added to the Face menu, and need not be in this list.
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This value takes effect when you load facemenu.el. If the
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list includes symbols which are not defined as faces, they
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are ignored; however, subsequently defining or creating
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those faces adds them to the menu then. You can call
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`facemenu-update' to recalculate the menu contents, such as
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if you change the value of this variable,
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If this variable is t, all faces that you apply to text
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using the face menu commands (even by name), and all faces
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that you define or create, are added to the menu. You may
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find it useful to set this variable to t temporarily while
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you define some faces, so that they will be added. However,
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if the value is no longer t and you call `facemenu-update',
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it will remove any faces not explicitly in the list."
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:type '(choice (const :tag "List all faces" t)
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(const :tag "None" nil)
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(repeat symbol))
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:group 'facemenu
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:version "22.1")
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(defvar facemenu-face-menu
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(let ((map (make-sparse-keymap "Face")))
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(define-key map "o" (cons "Other..." 'facemenu-set-face))
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map)
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"Menu keymap for faces.")
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(defalias 'facemenu-face-menu facemenu-face-menu)
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(put 'facemenu-face-menu 'menu-enable '(facemenu-enable-faces-p))
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(defvar facemenu-foreground-menu
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(let ((map (make-sparse-keymap "Foreground Color")))
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(define-key map "o" (cons "Other..." 'facemenu-set-foreground))
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map)
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"Menu keymap for foreground colors.")
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(defalias 'facemenu-foreground-menu facemenu-foreground-menu)
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(put 'facemenu-foreground-menu 'menu-enable '(facemenu-enable-faces-p))
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(defvar facemenu-background-menu
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(let ((map (make-sparse-keymap "Background Color")))
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(define-key map "o" (cons "Other..." 'facemenu-set-background))
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map)
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"Menu keymap for background colors.")
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(defalias 'facemenu-background-menu facemenu-background-menu)
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(put 'facemenu-background-menu 'menu-enable '(facemenu-enable-faces-p))
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;;; Condition for enabling menu items that set faces.
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(defun facemenu-enable-faces-p ()
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(not (and font-lock-mode font-lock-defaults)))
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(defvar facemenu-special-menu
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(let ((map (make-sparse-keymap "Special")))
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(define-key map [?s] (cons (purecopy "Remove Special")
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'facemenu-remove-special))
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(define-key map [?t] (cons (purecopy "Intangible")
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'facemenu-set-intangible))
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(define-key map [?v] (cons (purecopy "Invisible")
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'facemenu-set-invisible))
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(define-key map [?r] (cons (purecopy "Read-Only")
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'facemenu-set-read-only))
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map)
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"Menu keymap for non-face text-properties.")
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(defalias 'facemenu-special-menu facemenu-special-menu)
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(defvar facemenu-justification-menu
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(let ((map (make-sparse-keymap "Justification")))
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(define-key map [?c] (cons (purecopy "Center") 'set-justification-center))
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(define-key map [?b] (cons (purecopy "Full") 'set-justification-full))
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(define-key map [?r] (cons (purecopy "Right") 'set-justification-right))
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(define-key map [?l] (cons (purecopy "Left") 'set-justification-left))
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(define-key map [?u] (cons (purecopy "Unfilled") 'set-justification-none))
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map)
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"Submenu for text justification commands.")
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(defalias 'facemenu-justification-menu facemenu-justification-menu)
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(defvar facemenu-indentation-menu
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(let ((map (make-sparse-keymap "Indentation")))
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(define-key map [decrease-right-margin]
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(cons (purecopy "Indent Right Less") 'decrease-right-margin))
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(define-key map [increase-right-margin]
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(cons (purecopy "Indent Right More") 'increase-right-margin))
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(define-key map [decrease-left-margin]
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(cons (purecopy "Indent Less") 'decrease-left-margin))
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(define-key map [increase-left-margin]
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(cons (purecopy "Indent More") 'increase-left-margin))
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map)
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"Submenu for indentation commands.")
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(defalias 'facemenu-indentation-menu facemenu-indentation-menu)
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;; This is split up to avoid an overlong line in loaddefs.el.
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(defvar facemenu-menu nil
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"Facemenu top-level menu keymap.")
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(setq facemenu-menu (make-sparse-keymap "Text Properties"))
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(let ((map facemenu-menu))
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(define-key map [dc] (cons (purecopy "Display Colors") 'list-colors-display))
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(define-key map [df] (cons (purecopy "Display Faces") 'list-faces-display))
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(define-key map [dp] (cons (purecopy "Describe Properties")
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'describe-text-properties))
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(define-key map [ra] (cons (purecopy "Remove Text Properties")
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'facemenu-remove-all))
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(define-key map [rm] (cons (purecopy "Remove Face Properties")
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'facemenu-remove-face-props))
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(define-key map [s1] (list (purecopy "--"))))
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(let ((map facemenu-menu))
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(define-key map [in] (cons (purecopy "Indentation")
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'facemenu-indentation-menu))
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(define-key map [ju] (cons (purecopy "Justification")
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'facemenu-justification-menu))
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(define-key map [s2] (list (purecopy "--")))
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(define-key map [sp] (cons (purecopy "Special Properties")
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'facemenu-special-menu))
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(define-key map [bg] (cons (purecopy "Background Color")
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'facemenu-background-menu))
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(define-key map [fg] (cons (purecopy "Foreground Color")
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'facemenu-foreground-menu))
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(define-key map [fc] (cons (purecopy "Face")
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'facemenu-face-menu)))
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(defalias 'facemenu-menu facemenu-menu)
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(defvar facemenu-keymap
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(let ((map (make-sparse-keymap "Set face")))
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(define-key map "o" (cons (purecopy "Other...") 'facemenu-set-face))
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(define-key map "\M-o" 'font-lock-fontify-block)
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map)
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"Keymap for face-changing commands.
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`Facemenu-update' fills in the keymap according to the bindings
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requested in `facemenu-keybindings'.")
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(defalias 'facemenu-keymap facemenu-keymap)
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(defcustom facemenu-add-face-function nil
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"Function called at beginning of text to change or nil.
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This function is passed the FACE to set and END of text to change, and must
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return a string which is inserted. It may set `facemenu-end-add-face'."
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:type '(choice (const :tag "None" nil)
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function)
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:group 'facemenu)
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(defcustom facemenu-end-add-face nil
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"String to insert or function called at end of text to change or nil.
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This function is passed the FACE to set, and must return a string which is
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inserted."
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:type '(choice (const :tag "None" nil)
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string
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function)
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:group 'facemenu)
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(defcustom facemenu-remove-face-function nil
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"When non-nil, this is a function called to remove faces.
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This function is passed the START and END of text to change.
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May also be t meaning to use `facemenu-add-face-function'."
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:type '(choice (const :tag "None" nil)
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(const :tag "Use add-face" t)
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function)
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:group 'facemenu)
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;;; Internal Variables
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(defvar facemenu-color-alist nil
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"Alist of colors, used for completion.
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If this is nil, then the value of (defined-colors) is used.")
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(defun facemenu-update ()
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"Add or update the \"Face\" menu in the menu bar.
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You can call this to update things if you change any of the menu configuration
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variables."
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(interactive)
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;; Add each defined face to the menu.
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(facemenu-iterate 'facemenu-add-new-face
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(facemenu-complete-face-list facemenu-keybindings)))
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(defun facemenu-set-face (face &optional start end)
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"Apply FACE to the region or next character typed.
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If the region is active (normally true except in Transient
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Mark mode) and nonempty, and there is no prefix argument,
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this command applies FACE to the region. Otherwise, it applies FACE
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to the faces to use for the next character
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inserted. (Moving point or switching buffers before typing
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a character to insert cancels the specification.)
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If FACE is `default', to \"apply\" it means clearing
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the list of faces to be used. For any other value of FACE,
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to \"apply\" it means putting FACE at the front of the list
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of faces to be used, and removing any faces further
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along in the list that would be completely overridden by
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preceding faces (including FACE).
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This command can also add FACE to the menu of faces,
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if `facemenu-listed-faces' says to do that."
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(interactive (list (progn
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(barf-if-buffer-read-only)
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(read-face-name "Use face"))
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(if (and mark-active (not current-prefix-arg))
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(region-beginning))
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(if (and mark-active (not current-prefix-arg))
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(region-end))))
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(facemenu-add-new-face face)
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(facemenu-add-face face start end))
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(defun facemenu-set-foreground (color &optional start end)
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"Set the foreground COLOR of the region or next character typed.
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This command reads the color in the minibuffer.
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If the region is active (normally true except in Transient Mark mode)
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and there is no prefix argument, this command sets the region to the
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requested face.
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Otherwise, this command specifies the face for the next character
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inserted. Moving point or switching buffers before
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typing a character to insert cancels the specification."
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(interactive (list (progn
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(barf-if-buffer-read-only)
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(facemenu-read-color "Foreground color: "))
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(if (and mark-active (not current-prefix-arg))
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(region-beginning))
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(if (and mark-active (not current-prefix-arg))
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(region-end))))
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(facemenu-set-face-from-menu
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(facemenu-add-new-color color 'facemenu-foreground-menu)
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start end))
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(defun facemenu-set-background (color &optional start end)
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"Set the background COLOR of the region or next character typed.
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This command reads the color in the minibuffer.
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If the region is active (normally true except in Transient Mark mode)
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and there is no prefix argument, this command sets the region to the
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requested face.
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Otherwise, this command specifies the face for the next character
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inserted. Moving point or switching buffers before
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typing a character to insert cancels the specification."
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(interactive (list (progn
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(barf-if-buffer-read-only)
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(facemenu-read-color "Background color: "))
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(if (and mark-active (not current-prefix-arg))
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(region-beginning))
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(if (and mark-active (not current-prefix-arg))
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(region-end))))
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(facemenu-set-face-from-menu
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(facemenu-add-new-color color 'facemenu-background-menu)
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start end))
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(defun facemenu-set-face-from-menu (face start end)
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"Set the FACE of the region or next character typed.
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This function is designed to be called from a menu; FACE is determined
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using the event type of the menu entry. If FACE is a symbol whose
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name starts with \"fg:\" or \"bg:\", then this functions sets the
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foreground or background to the color specified by the rest of the
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symbol's name. Any other symbol is considered the name of a face.
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If the region is active (normally true except in Transient Mark mode)
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and there is no prefix argument, this command sets the region to the
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requested face.
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Otherwise, this command specifies the face for the next character
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inserted. Moving point or switching buffers before typing a character
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to insert cancels the specification."
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(interactive (list last-command-event
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(if (and mark-active (not current-prefix-arg))
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(region-beginning))
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(if (and mark-active (not current-prefix-arg))
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(region-end))))
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(barf-if-buffer-read-only)
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(facemenu-add-face
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(let ((fn (symbol-name face)))
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(if (string-match "\\`\\([fb]\\)g:\\(.+\\)" fn)
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(list (list (if (string= (match-string 1 fn) "f")
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:foreground
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:background)
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(match-string 2 fn)))
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face))
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start end))
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(defun facemenu-set-invisible (start end)
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"Make the region invisible.
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This sets the `invisible' text property; it can be undone with
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`facemenu-remove-special'."
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(interactive "r")
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(add-text-properties start end '(invisible t)))
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(defun facemenu-set-intangible (start end)
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"Make the region intangible: disallow moving into it.
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This sets the `intangible' text property; it can be undone with
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`facemenu-remove-special'."
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(interactive "r")
|
||
(add-text-properties start end '(intangible t)))
|
||
|
||
(defun facemenu-set-read-only (start end)
|
||
"Make the region unmodifiable.
|
||
This sets the `read-only' text property; it can be undone with
|
||
`facemenu-remove-special'."
|
||
(interactive "r")
|
||
(add-text-properties start end '(read-only t)))
|
||
|
||
(defun facemenu-remove-face-props (start end)
|
||
"Remove `face' and `mouse-face' text properties."
|
||
(interactive "*r") ; error if buffer is read-only despite the next line.
|
||
(let ((inhibit-read-only t))
|
||
(remove-text-properties
|
||
start end '(face nil mouse-face nil))))
|
||
|
||
(defun facemenu-remove-all (start end)
|
||
"Remove all text properties from the region."
|
||
(interactive "*r") ; error if buffer is read-only despite the next line.
|
||
(let ((inhibit-read-only t))
|
||
(set-text-properties start end nil)))
|
||
|
||
(defun facemenu-remove-special (start end)
|
||
"Remove all the \"special\" text properties from the region.
|
||
These special properties include `invisible', `intangible' and `read-only'."
|
||
(interactive "*r") ; error if buffer is read-only despite the next line.
|
||
(let ((inhibit-read-only t))
|
||
(remove-text-properties
|
||
start end '(invisible nil intangible nil read-only nil))))
|
||
|
||
(defun facemenu-read-color (&optional prompt)
|
||
"Read a color using the minibuffer."
|
||
(let* ((completion-ignore-case t)
|
||
(color-list (or facemenu-color-alist (defined-colors)))
|
||
(completer
|
||
(lambda (string pred all-completions)
|
||
(if all-completions
|
||
(or (all-completions string color-list pred)
|
||
(if (color-defined-p string)
|
||
(list string)))
|
||
(or (try-completion string color-list pred)
|
||
(if (color-defined-p string)
|
||
string)))))
|
||
(col (completing-read (or prompt "Color: ") completer nil t)))
|
||
(if (equal "" col)
|
||
nil
|
||
col)))
|
||
|
||
(defun list-colors-display (&optional list buffer-name)
|
||
"Display names of defined colors, and show what they look like.
|
||
If the optional argument LIST is non-nil, it should be a list of
|
||
colors to display. Otherwise, this command computes a list of
|
||
colors that the current display can handle. If the optional
|
||
argument BUFFER-NAME is nil, it defaults to *Colors*."
|
||
(interactive)
|
||
(when (and (null list) (> (display-color-cells) 0))
|
||
(setq list (list-colors-duplicates (defined-colors)))
|
||
(when (memq (display-visual-class) '(gray-scale pseudo-color direct-color))
|
||
;; Don't show more than what the display can handle.
|
||
(let ((lc (nthcdr (1- (display-color-cells)) list)))
|
||
(if lc
|
||
(setcdr lc nil)))))
|
||
(with-help-window (or buffer-name "*Colors*")
|
||
(save-excursion
|
||
(set-buffer standard-output)
|
||
(setq truncate-lines t)
|
||
(if temp-buffer-show-function
|
||
(list-colors-print list)
|
||
;; Call list-colors-print from temp-buffer-show-hook
|
||
;; to get the right value of window-width in list-colors-print
|
||
;; after the buffer is displayed.
|
||
(add-hook 'temp-buffer-show-hook
|
||
(lambda () (list-colors-print list)) nil t)))))
|
||
|
||
(defun list-colors-print (list)
|
||
(dolist (color list)
|
||
(if (consp color)
|
||
(if (cdr color)
|
||
(setq color (sort color (lambda (a b)
|
||
(string< (downcase a)
|
||
(downcase b))))))
|
||
(setq color (list color)))
|
||
(put-text-property
|
||
(prog1 (point)
|
||
(insert (car color))
|
||
(indent-to 22))
|
||
(point)
|
||
'face (list ':background (car color)))
|
||
(put-text-property
|
||
(prog1 (point)
|
||
(insert " " (if (cdr color)
|
||
(mapconcat 'identity (cdr color) ", ")
|
||
(car color))))
|
||
(point)
|
||
'face (list ':foreground (car color)))
|
||
(indent-to (max (- (window-width) 8) 44))
|
||
(insert (apply 'format "#%02x%02x%02x"
|
||
(mapcar (lambda (c) (lsh c -8))
|
||
(color-values (car color)))))
|
||
|
||
(insert "\n"))
|
||
(goto-char (point-min)))
|
||
|
||
(defun list-colors-duplicates (&optional list)
|
||
"Return a list of colors with grouped duplicate colors.
|
||
If a color has no duplicates, then the element of the returned list
|
||
has the form '(COLOR-NAME). The element of the returned list with
|
||
duplicate colors has the form '(COLOR-NAME DUPLICATE-COLOR-NAME ...).
|
||
This function uses the predicate `facemenu-color-equal' to compare
|
||
color names. If the optional argument LIST is non-nil, it should
|
||
be a list of colors to display. Otherwise, this function uses
|
||
a list of colors that the current display can handle."
|
||
(let* ((list (mapcar 'list (or list (defined-colors))))
|
||
(l list))
|
||
(while (cdr l)
|
||
(if (and (facemenu-color-equal (car (car l)) (car (car (cdr l))))
|
||
(not (if (fboundp 'w32-default-color-map)
|
||
(not (assoc (car (car l)) (w32-default-color-map))))))
|
||
(progn
|
||
(setcdr (car l) (cons (car (car (cdr l))) (cdr (car l))))
|
||
(setcdr l (cdr (cdr l))))
|
||
(setq l (cdr l))))
|
||
list))
|
||
|
||
(defun facemenu-color-equal (a b)
|
||
"Return t if colors A and B are the same color.
|
||
A and B should be strings naming colors.
|
||
This function queries the display system to find out what the color
|
||
names mean. It returns nil if the colors differ or if it can't
|
||
determine the correct answer."
|
||
(cond ((equal a b) t)
|
||
((equal (color-values a) (color-values b)))))
|
||
|
||
(defun facemenu-add-face (face &optional start end)
|
||
"Add FACE to text between START and END.
|
||
If START is nil or START to END is empty, add FACE to next typed character
|
||
instead. For each section of that region that has a different face property,
|
||
FACE will be consed onto it, and other faces that are completely hidden by
|
||
that will be removed from the list.
|
||
If `facemenu-add-face-function' and maybe `facemenu-end-add-face' are non-nil,
|
||
they are used to set the face information.
|
||
|
||
As a special case, if FACE is `default', then the region is left with NO face
|
||
text property. Otherwise, selecting the default face would not have any
|
||
effect. See `facemenu-remove-face-function'."
|
||
(interactive "*xFace: \nr")
|
||
(if (and (eq face 'default)
|
||
(not (eq facemenu-remove-face-function t)))
|
||
(if facemenu-remove-face-function
|
||
(funcall facemenu-remove-face-function start end)
|
||
(if (and start (< start end))
|
||
(remove-text-properties start end '(face default))
|
||
(setq self-insert-face 'default
|
||
self-insert-face-command this-command)))
|
||
(if facemenu-add-face-function
|
||
(save-excursion
|
||
(if end (goto-char end))
|
||
(save-excursion
|
||
(if start (goto-char start))
|
||
(insert-before-markers
|
||
(funcall facemenu-add-face-function face end)))
|
||
(if facemenu-end-add-face
|
||
(insert (if (stringp facemenu-end-add-face)
|
||
facemenu-end-add-face
|
||
(funcall facemenu-end-add-face face)))))
|
||
(if (and start (< start end))
|
||
(let ((part-start start) part-end)
|
||
(while (not (= part-start end))
|
||
(setq part-end (next-single-property-change part-start 'face
|
||
nil end))
|
||
(let ((prev (get-text-property part-start 'face)))
|
||
(put-text-property part-start part-end 'face
|
||
(if (null prev)
|
||
face
|
||
(facemenu-active-faces
|
||
(cons face
|
||
(if (listp prev)
|
||
prev
|
||
(list prev)))
|
||
;; Specify the selected frame
|
||
;; because nil would mean to use
|
||
;; the new-frame default settings,
|
||
;; and those are usually nil.
|
||
(selected-frame)))))
|
||
(setq part-start part-end)))
|
||
(setq self-insert-face (if (eq last-command self-insert-face-command)
|
||
(cons face (if (listp self-insert-face)
|
||
self-insert-face
|
||
(list self-insert-face)))
|
||
face)
|
||
self-insert-face-command this-command))))
|
||
(unless (facemenu-enable-faces-p)
|
||
(message "Font-lock mode will override any faces you set in this buffer")))
|
||
|
||
(defun facemenu-active-faces (face-list &optional frame)
|
||
"Return from FACE-LIST those faces that would be used for display.
|
||
This means each face attribute is not specified in a face earlier in FACE-LIST
|
||
and such a face is therefore active when used to display text.
|
||
If the optional argument FRAME is given, use the faces in that frame; otherwise
|
||
use the selected frame. If t, then the global, non-frame faces are used."
|
||
(let* ((mask-atts (copy-sequence
|
||
(if (consp (car face-list))
|
||
(face-attributes-as-vector (car face-list))
|
||
(or (internal-lisp-face-p (car face-list) frame)
|
||
(check-face (car face-list))))))
|
||
(active-list (list (car face-list)))
|
||
(face-list (cdr face-list))
|
||
(mask-len (length mask-atts)))
|
||
(while face-list
|
||
(if (let ((face-atts
|
||
(if (consp (car face-list))
|
||
(face-attributes-as-vector (car face-list))
|
||
(or (internal-lisp-face-p (car face-list) frame)
|
||
(check-face (car face-list)))))
|
||
(i mask-len)
|
||
(useful nil))
|
||
(while (>= (setq i (1- i)) 0)
|
||
(and (not (memq (aref face-atts i) '(nil unspecified)))
|
||
(memq (aref mask-atts i) '(nil unspecified))
|
||
(aset mask-atts i (setq useful t))))
|
||
useful)
|
||
(setq active-list (cons (car face-list) active-list)))
|
||
(setq face-list (cdr face-list)))
|
||
(nreverse active-list)))
|
||
|
||
(defun facemenu-add-new-face (face)
|
||
"Add FACE (a face) to the Face menu if `facemenu-listed-faces' says so.
|
||
This is called whenever you create a new face, and at other times."
|
||
(let* (name
|
||
symbol
|
||
menu docstring
|
||
(key (cdr (assoc face facemenu-keybindings)))
|
||
function menu-val)
|
||
(if (symbolp face)
|
||
(setq name (symbol-name face)
|
||
symbol face)
|
||
(setq name face
|
||
symbol (intern name)))
|
||
(setq menu 'facemenu-face-menu)
|
||
(setq docstring
|
||
(format "Select face `%s' for subsequent insertion.
|
||
If the mark is active and there is no prefix argument,
|
||
apply face `%s' to the region instead.
|
||
This command was defined by `facemenu-add-new-face'."
|
||
name name))
|
||
(cond ((facemenu-iterate ; check if equivalent face is already in the menu
|
||
(lambda (m) (and (listp m)
|
||
(symbolp (car m))
|
||
;; Avoid error in face-equal
|
||
;; when a non-face is erroneously present.
|
||
(facep (car m))
|
||
(face-equal (car m) symbol)))
|
||
(cdr (symbol-function menu))))
|
||
;; Faces with a keyboard equivalent. These go at the front.
|
||
(key
|
||
(setq function (intern (concat "facemenu-set-" name)))
|
||
(fset function
|
||
`(lambda ()
|
||
,docstring
|
||
(interactive)
|
||
(facemenu-set-face
|
||
(quote ,symbol)
|
||
(if (and mark-active (not current-prefix-arg))
|
||
(region-beginning))
|
||
(if (and mark-active (not current-prefix-arg))
|
||
(region-end)))))
|
||
(define-key 'facemenu-keymap key (cons name function))
|
||
(define-key menu key (cons name function)))
|
||
;; Faces with no keyboard equivalent. Figure out where to put it:
|
||
((or (eq t facemenu-listed-faces)
|
||
(memq symbol facemenu-listed-faces))
|
||
(setq key (vector symbol)
|
||
function 'facemenu-set-face-from-menu
|
||
menu-val (symbol-function menu))
|
||
(if (and facemenu-new-faces-at-end
|
||
(> (length menu-val) 3))
|
||
(define-key-after menu-val key (cons name function)
|
||
(car (nth (- (length menu-val) 3) menu-val)))
|
||
(define-key menu key (cons name function))))))
|
||
nil) ; Return nil for facemenu-iterate
|
||
|
||
(defun facemenu-add-new-color (color menu)
|
||
"Add COLOR (a color name string) to the appropriate Face menu.
|
||
MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'.
|
||
Return the event type (a symbol) of the added menu entry.
|
||
|
||
This is called whenever you use a new color."
|
||
(let (symbol docstring)
|
||
(unless (color-defined-p color)
|
||
(error "Color `%s' undefined" color))
|
||
(cond ((eq menu 'facemenu-foreground-menu)
|
||
(setq docstring
|
||
(format "Select foreground color %s for subsequent insertion."
|
||
color)
|
||
symbol (intern (concat "fg:" color))))
|
||
((eq menu 'facemenu-background-menu)
|
||
(setq docstring
|
||
(format "Select background color %s for subsequent insertion."
|
||
color)
|
||
symbol (intern (concat "bg:" color))))
|
||
(t (error "MENU should be `facemenu-foreground-menu' or `facemenu-background-menu'")))
|
||
(unless (facemenu-iterate ; Check if color is already in the menu.
|
||
(lambda (m) (and (listp m)
|
||
(eq (car m) symbol)))
|
||
(cdr (symbol-function menu)))
|
||
;; Color is not in the menu. Figure out where to put it.
|
||
(let ((key (vector symbol))
|
||
(function 'facemenu-set-face-from-menu)
|
||
(menu-val (symbol-function menu)))
|
||
(if (and facemenu-new-faces-at-end
|
||
(> (length menu-val) 3))
|
||
(define-key-after menu-val key (cons color function)
|
||
(car (nth (- (length menu-val) 3) menu-val)))
|
||
(define-key menu key (cons color function)))))
|
||
symbol))
|
||
|
||
(defun facemenu-complete-face-list (&optional oldlist)
|
||
"Return list of all faces that look different.
|
||
Starts with given ALIST of faces, and adds elements only if they display
|
||
differently from any face already on the list.
|
||
The faces on ALIST will end up at the end of the returned list, in reverse
|
||
order."
|
||
(let ((list (nreverse (mapcar 'car oldlist))))
|
||
(facemenu-iterate
|
||
(lambda (new-face)
|
||
(if (not (memq new-face list))
|
||
(setq list (cons new-face list)))
|
||
nil)
|
||
(nreverse (face-list)))
|
||
list))
|
||
|
||
(defun facemenu-iterate (func list)
|
||
"Apply FUNC to each element of LIST until one returns non-nil.
|
||
Returns the non-nil value it found, or nil if all were nil."
|
||
(while (and list (not (funcall func (car list))))
|
||
(setq list (cdr list)))
|
||
(car list))
|
||
|
||
(facemenu-update)
|
||
|
||
(provide 'facemenu)
|
||
|
||
;; arch-tag: 85f6d02b-9085-420e-b651-0678f0e9c7eb
|
||
;;; facemenu.el ends here
|