177 lines
6.4 KiB
EmacsLisp
177 lines
6.4 KiB
EmacsLisp
;;; acdw-fonts.el -- font setup -*- lexical-binding: t; coding: utf-8-unix -*-
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;; Author: Case Duckworth <acdw@acdw.net>
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;; Created: Sometime during Covid-19, 2020
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;; Keywords: configuration
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;; URL: https://tildegit.org/acdw/emacs
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;; This file is NOT part of GNU Emacs.
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;; Everyone is permitted to do whatever with this software, without
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;; limitation. This software comes without any warranty whatsoever,
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;; but with two pieces of advice:
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;; - Don't hurt yourself.
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;; - Make good choices.
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;;; Commentary:
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;; This code is based heavily on (and in fact, until I am able to tweak it,
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;; will be a copy of) Oliver Taylor's code, available here:
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;; https://github.com/olivertaylor/olivertaylor.github.io
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;; /blob/master/notes/20210324_emacs-optical-font-adjustment.org
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;;; Code:
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;; Variables
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(defvar acdw-fonts/monospace nil
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"Monospace font to be used for `default' and `fixed-pitch' faces.")
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(defvar acdw-fonts/variable nil
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"Variable font to be used for the `variable-pitch' face.")
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(defvar acdw-fonts/monospace-size 11
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"Font size, an integer, to be used for the `default' and `fixed-pitch' faces.
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This value is multiplied by 10, so 12 becomes 120, in order to
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comply with Emacs's `set-face-attribute' requirements.")
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(defvar acdw-fonts/variable-size 12
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"Font size, an integer, to be used for the `variable-pitch' face.
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This value will be used to determine a relative (float) size
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based on the default size. So if your default size is 12 and
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your variable size is 14, the computed relative size will be
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1.16.")
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;; Functions
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(defun acdw-fonts/set ()
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"Set fonts according to `acdw-fonts' variables."
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(interactive)
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(set-face-attribute 'default nil
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:family acdw-fonts/monospace
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:height (* acdw-fonts/monospace-size 10))
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(set-face-attribute 'fixed-pitch nil
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:family acdw-fonts/monospace
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:height 1.0)
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(set-face-attribute 'variable-pitch nil
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:family acdw-fonts/variable
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:height 1.0))
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;;; Larger Variable Pitch Mode
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;; A minor mode to scale the variable-pitch face up to the height defined in
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;; `acdw-fonts/variable-size' and the fixed-pitch face down to the height
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;; defined in `acdw-fonts/monospace-size', buffer locally. This mode should
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;; be enabled wherever you want to adjust face sizes, perhaps with a hook.
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(make-variable-buffer-local
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(defvar larger-variable-pitch-mode-status nil
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"Status of the larger-variable-pitch-mode"))
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(make-variable-buffer-local
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(defvar variable-pitch-remapping nil
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"variable-pitch remapping cookie for larger-variable-pitch-mode."))
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(make-variable-buffer-local
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(defvar fixed-pitch-remapping nil
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"fixed-pitch remapping cookie for larger-variable-pitch-mode"))
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(defun larger-variable-pitch-mode-toggle ()
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(setq larger-variable-pitch-mode-status
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(not larger-variable-pitch-mode-status))
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(if larger-variable-pitch-mode-status
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(progn
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(setq variable-pitch-remapping
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(face-remap-add-relative
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'variable-pitch :height (/ (float acdw-fonts/variable-size)
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(float acdw-fonts/monospace-size))))
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(setq fixed-pitch-remapping
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(face-remap-add-relative
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'fixed-pitch :height (/ (float acdw-fonts/monospace-size)
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(float acdw-fonts/variable-size))))
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(force-window-update (current-buffer)))
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(progn
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(face-remap-remove-relative variable-pitch-remapping)
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(face-remap-remove-relative fixed-pitch-remapping))))
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(define-minor-mode larger-variable-pitch-mode
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"Minor mode to scale the variable- and fixed-pitch faces up and down."
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:init-value nil
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:lighter " V+"
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(larger-variable-pitch-mode-toggle))
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(defun acdw-fonts/buffer-face-hook ()
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"Activate and deactivate larger-variable-pitch-mode minor mode."
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(if buffer-face-mode
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(larger-variable-pitch-mode 1)
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(larger-variable-pitch-mode -1)))
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(add-hook 'buffer-face-mode-hook #'acdw-fonts/buffer-face-hook)
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;;; Emoji fonts
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;; from https://old.reddit.com/r/emacs/comments/mvlid5/
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(defun acdw-fonts/setup-emoji-fonts (&rest emoji-fonts)
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"For all EMOJI-FONTS that exist, add them to the symbol fontset.
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This is for emoji fonts."
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(let ((ffl (font-family-list)))
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(dolist (font emoji-fonts)
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(when (member font ffl)
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(set-fontset-font t 'symbol
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(font-spec :family font) nil 'append)))))
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;;; Variable-pitch
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;; from https://github.com/turbana/emacs-config#variable-pitch
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(defcustom acdw-fonts/fixed-pitch-faces '(linum
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org-block
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org-block-begin-line
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org-block-end-line
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org-checkbox
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org-code
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org-date
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org-document-info-keyword
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org-hide
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org-indent
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org-link
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org-meta-line
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org-special-keyword
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org-table
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whitespace-space)
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"Faces to keep fixed-pitch in `acdw/variable-pitch-mode'."
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:type 'sexp
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:group 'faces)
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(defun acdw-fonts//variable-pitch-add-inherit (attrs parent)
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"Add `:inherit PARENT' to ATTRS unless already present.
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Handles cases where `:inherit' is already specified."
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(let ((current-parent (plist-get attrs :inherit)))
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(unless (or (eq parent current-parent)
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(and (listp current-parent)
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(member parent current-parent)))
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(plist-put attrs :inherit (if current-parent
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(list current-parent parent)
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parent)))))
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(defun acdw-fonts/adapt-variable-pitch ()
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"Adapt `variable-pitch-mode' to keep some fonts fixed-pitch."
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(when variable-pitch-mode
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(mapc (lambda (face)
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(when (facep face)
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(apply #'set-face-attribute
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face nil (acdw-fonts//variable-pitch-add-inherit
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(face-attr-construct face)
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'fixed-pitch))))
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acdw-fonts/fixed-pitch-faces)))
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(provide 'acdw-fonts)
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;;; acdw-fonts.el ends here
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