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;;; mixed-pitch.el --- Use a variable pitch, keeping fixed pitch where it's sensible -*- lexical-binding: t; -*-
;;; Copyright (C) 2017, 2018 by J. Alexander Branham
;; Author: J. Alexander Branham <branham@utexas.edu>
;; Maintainer: J. Alexander Branham <branham@utexas.edu>
;; URL: https://gitlab.com/jabranham/mixed-pitch
;; Package-Version: 20200511.2052
;; Package-Commit: 1cad46fddf741ed7ec5fc477d70e079e908e9ce6
;; Version: 1.1.0
;; Package-Requires: ((emacs "24.3"))
;; This file is not part of GNU Emacs.
;;; License:
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see
;; <http://www.gnu.org/licenses/>
;;; Commentary:
;; `mixed-pitch-mode' is a minor mode that enables mixing variable-pitch and
;; fixed-pitch fonts in the same buffer. The list
;; `mixed-pitch-fixed-pitch-faces' defines the faces that are kept fixed-pitch,
;; everything else becomes variable-pitch.
;; Original idea came from https://ogbe.net/blog/toggle-serif.html
;; Shared with permission.
;; Usage:
;; (require 'mixed-pitch)
;; (mixed-pitch-mode)
;; Or, to apply mixed-pitch-mode in all text modes:
;; (add-hook 'text-mode-hook #'mixed-pitch-mode)
;;; Code:
(require 'face-remap)
(defgroup mixed-pitch nil
"Mix variable and fixed pitch in a single buffer."
:tag "Mixed pitch"
:prefix "mixed-pitch"
:group 'mixed-pitch)
(defcustom mixed-pitch-fixed-pitch-faces
'(diff-added
diff-context
diff-file-header
diff-function
diff-header
diff-hunk-header
diff-removed
font-latex-math-face
font-latex-sedate-face
font-latex-warning-face
font-latex-sectioning-5-face
font-lock-builtin-face
font-lock-comment-delimiter-face
font-lock-constant-face
font-lock-doc-face
font-lock-function-name-face
font-lock-keyword-face
font-lock-negation-char-face
font-lock-preprocessor-face
font-lock-regexp-grouping-backslash
font-lock-regexp-grouping-construct
font-lock-string-face
font-lock-type-face
font-lock-variable-name-face
markdown-code-face
markdown-gfm-checkbox-face
markdown-inline-code-face
markdown-language-info-face
markdown-language-keyword-face
markdown-math-face
message-header-name
message-header-to
message-header-cc
message-header-newsgroups
message-header-xheader
message-header-subject
message-header-other
mu4e-header-key-face
mu4e-header-value-face
mu4e-link-face
mu4e-contact-face
mu4e-compose-separator-face
mu4e-compose-header-face
org-block
org-block-begin-line
org-block-end-line
org-document-info-keyword
org-code
org-indent
org-latex-and-related
org-checkbox
org-formula
org-meta-line
org-table
org-verbatim)
"This is a list holding names of faces that will not be variable pitch when function `mixed-pitch-mode' is enabled."
:type '(repeat face)
:package-version '(mixed-pitch . "1.1.1")
:group 'mixed-pitch)
(defcustom mixed-pitch-variable-pitch-cursor 'bar
"If non-nil, function `mixed-pitch-mode' changes the cursor.
When disabled, switch back to what it was before.
See `cursor-type' for a list of acceptable types."
:type 'symbol
:group 'mixed-pitch)
(defcustom mixed-pitch-set-height nil
"If non-nil, set the height of the face.
When nil, only set the family."
:type 'boolean
:package-version '(mixed-pitch . "1.1.0")
:group 'mixed-pitch)
(defvar-local mixed-pitch-fixed-cookie nil)
(defvar-local mixed-pitch-variable-cookie nil)
(defvar-local mixed-pitch-cursor-type nil)
;;;###autoload
(define-minor-mode mixed-pitch-mode
"Change the default face of the current buffer to a variable pitch, while keeping some faces fixed pitch.
See the variable `mixed-pitch-fixed-pitch-faces' for a list of
which faces remain fixed pitch. The height and pitch of faces is
inherited from `variable-pitch' and `default'."
:lighter " MPM"
(let ((var-pitch (face-attribute 'variable-pitch :family))
(var-height (face-attribute 'variable-pitch :height))
(fix-pitch (face-attribute 'default :family))
(fix-height (face-attribute 'default :height)))
;; Turn mixed-pitch-mode on:
(if mixed-pitch-mode
(progn
;; remember cursor type
(when mixed-pitch-variable-pitch-cursor
(setq mixed-pitch-cursor-type cursor-type))
;; remap default face to variable pitch
(setq mixed-pitch-variable-cookie
(if mixed-pitch-set-height
(face-remap-add-relative
'default :family var-pitch :height var-height)
(face-remap-add-relative 'default :family var-pitch)))
(setq mixed-pitch-fixed-cookie nil)
;; keep fonts in `mixed-pitch-fixed-pitch-faces' as fixed-pitch.
(dolist (face mixed-pitch-fixed-pitch-faces)
(add-to-list 'mixed-pitch-fixed-cookie
(if mixed-pitch-set-height
(face-remap-add-relative
face :family fix-pitch :height fix-height)
(face-remap-add-relative face :family fix-pitch))))
;; Change the cursor if the user requested:
(when mixed-pitch-variable-pitch-cursor (setq cursor-type mixed-pitch-variable-pitch-cursor)))
;; Turn mixed-pitch-mode off:
(progn (face-remap-remove-relative mixed-pitch-variable-cookie)
(dolist (cookie mixed-pitch-fixed-cookie)
(face-remap-remove-relative cookie))
;; Restore the cursor if we changed it:
(when mixed-pitch-variable-pitch-cursor
(setq cursor-type mixed-pitch-cursor-type))))))
(provide 'mixed-pitch)
;;; mixed-pitch.el ends here
|
