#+TITLE: Modus Themes for GNU Emacs
#+AUTHOR: Protesilaos Stavrou
#+EMAIL: public@protesilaos.com

* Overview
  :PROPERTIES:
  :CUSTOM_ID: h:d42d56a4-9252-4858-ac8e-3306cdd24e19
  :END:

This is a set of accessible themes for GNU Emacs.  The contrast ratio
between foreground and background values should always be >= 7:1, which
conforms with the WCAG AAA accessibility standard.  This is the highest
standard of its kind.

The /Modus themes/ project consists of two standalone items, one where
dark text is cast on a light backdrop (Modus Operandi) and another where
light text is displayed against a dark background (Modus Vivendi).

*Check the [[https://gitlab.com/protesilaos/modus-themes/wikis/Screenshots][Wiki page with the screen shots]].* Also note that I demo these
themes in [[https://protesilaos.com/code-casts][my Emacs-related screen casts]] (though older videos contain
earlier, "alpha" versions).

* Install and auto-load
  :PROPERTIES:
  :CUSTOM_ID: h:25c3ecd3-8025-414c-9b96-e4d6266c6fe8
  :END:

** Install the MELPA packages
   :PROPERTIES:
   :CUSTOM_ID: h:c3e293e8-8464-4196-aefd-184027116ded
   :END:

I maintain /Modus Operandi/ (light theme) and /Modus Vivendi/ (dark) as
standalone packages in [[http://melpa.org/][MELPA]] (and MELPA Stable).  Assuming you have
configured that repository for your package management needs, you can
just run:

=M-x package-install RET modus-operandi-theme RET=

And/or:

=M-x package-install RET modus-vivendi-theme RET=

To be clear, that sequence means:

+ press `Meta-X'
+ type `package-install'
+ hit the Return key
+ type the name of the package
+ hit Return to confirm your choice

*** With `use-package'
    :PROPERTIES:
    :CUSTOM_ID: h:3ab0ac39-38fb-405b-8a15-771cbd843b6d
    :END:

For a declarative approach with =use-package=, you can write something
like this:

#+BEGIN_SRC emacs-lisp
(use-package modus-operandi-theme
  :ensure t)

(use-package modus-vivendi-theme
  :ensure t)
#+END_SRC

** Manual installation method
   :PROPERTIES:
   :CUSTOM_ID: h:0317c29a-3ddb-4a0a-8ffd-16c781733ea2
   :END:

Download the files in this repository ending in =*-theme.el= and place
them in an appropriate directory, such as =~/.emacs.d/themes/=.  To make
sure the filesystem path of your choice is read by Emacs, insert the
following in your initialisation file:

#+BEGIN_SRC emacs-lisp
(add-to-list 'custom-theme-load-path "~/.emacs.d/themes/")
#+END_SRC

** Load automatically
   :PROPERTIES:
   :CUSTOM_ID: h:ae978e05-526f-4509-a007-44a0925b8bce
   :END:

To load the theme from your Emacs initialisation file use the relevant
snippet:

#+BEGIN_SRC emacs-lisp
(load-theme 'modus-operandi t)          ; Light theme
(load-theme 'modus-vivendi t)           ; Dark theme
#+END_SRC

Make sure to /remove any other theme/ that is being loaded, otherwise
you might run into unexpected issues.

* Customisation options
  :PROPERTIES:
  :CUSTOM_ID: h:d414ca47-6dce-4905-9f2e-de1465bf23bb
  :END:

Both of the Modus themes expose some variables that allow users to tweak
the look of the theme.  By default, all variables are deactivated,
meaning that *you need to explicitly opt in*.

This is what is available right now (use the ones appropriate to the
theme of your choice):

#+BEGIN_SRC emacs-lisp
;; Choose to render some code constructs in slanted text (italics).  The
;; default, shown below, is to not use italics, unless it is absolutely
;; necessary.
(setq modus-operandi-theme-slanted-constructs nil)

(setq modus-vivendi-theme-slanted-constructs nil)

;; Use proportionately-spaced fonts (variable-pitch) for headings.  The
;; default is to use whatever font the user has selected, typically a
;; monospaced typeface.
(setq modus-operandi-theme-proportional-fonts nil)

(setq modus-vivendi-theme-proportional-fonts nil)

;; Whether headings should be scaled or have the same height as body
;; text.  The default is to keep everything the same as the base size.
(setq modus-operandi-theme-scale-headings nil)

(setq modus-vivendi-theme-scale-headings nil)

;; Font scale that should apply to headings.  These are the default values.
(setq modus-operandi-theme-scale-1 1.05)
(setq modus-operandi-theme-scale-2 1.1)
(setq modus-operandi-theme-scale-3 1.15)
(setq modus-operandi-theme-scale-4 1.2)

(setq modus-vivendi-theme-scale-1 1.05)
(setq modus-vivendi-theme-scale-2 1.1)
(setq modus-vivendi-theme-scale-3 1.15)
(setq modus-vivendi-theme-scale-4 1.2)
#+END_SRC

*NOTE* that all customisation options must be declared /before/ loading
the theme, else they will not be parsed and have no effect.

* Face coverage
  :PROPERTIES:
  :CUSTOM_ID: h:944a3bdf-f545-40a0-a26c-b2cec8b2b316
  :END:

This list will always be updated to reflect the current state of the
project.  The idea is to offer an overview of the /known status/ of all
affected face groups.

** Full support
   :PROPERTIES:
   :CUSTOM_ID: h:5ea98392-1376-43a4-8080-2d42a5b690ef
   :END:

The items with an appended asterisk =*= tend to have lots of extensions, so
the "full support" may not be 100% true…

+ all-the-icons
+ annotate
+ anzu
+ apt-sources-list
+ artbollocks-mode
+ auto-dim-other-buffers
+ avy
+ ace-window
+ calendar
+ calfw
+ column-enforce-mode
+ company-mode*
+ company-posframe
+ compilation-mode
+ completions
+ counsel*
+ counsel-css
+ counsel-notmuch
+ counsel-org-capture-string
+ cov
+ custom (=M-x customize=)
+ dashboard (emacs-dashboard)
+ deadgrep
+ define-word
+ disk-usage
+ diff-hl
+ diff-mode
+ dired
+ dired-async
+ dired-git-info
+ dired-narrow
+ dired-subtree
+ diredfl
+ doom-modeline
+ easy-jekyll
+ easy-kill
+ ediff
+ eldoc-box
+ elfeed
+ emms
+ epa
+ erc
+ eshell
+ evil* (evil-mode)
+ evil-goggles
+ evil-visual-mark-mode
+ eww
+ eyebrowse
+ fancy-dabbrev
+ font-lock (generic syntax highlighting)
+ flycheck
+ flycheck-posframe
+ flyspell
+ geiser
+ git
+ git-gutter (and variants)
+ gnus
+ helm*
+ hydra
+ ido-mode
+ iedit
+ info pages
+ isearch, occur, etc.
+ ivy*
+ ivy-posframe
+ keycast
+ line numbers (=display-line-numbers-mode= and global variant)
+ magit
+ markdown-mode
+ matching parentheses
+ messages
+ modeline
+ mood-line
+ mu4e
+ neotree
+ org*
+ org-journal
+ org-noter
+ org-recur
+ outline-mode
+ package (=M-x list-packages=)
+ paren-face
+ pass
+ persp-mode
+ perspective
+ powerline
+ prodigy
+ rainbow-blocks
+ rainbow-delimiters
+ ruler-mode
+ shell-script-mode
+ smart-mode-line
+ smartparens
+ smerge
+ speedbar
+ swiper
+ sx
+ term
+ transient (pop-up windows like Magit's)
+ treemacs
+ undo-tree
+ vc (built-in mode line status for version control)
+ visual-regexp
+ wgrep
+ which-key
+ whitespace-mode
+ writegood-mode
+ xah-elisp-mode
+ xterm-color (and ansi-colors)
+ ztree

Plus many other miscellaneous faces that are provided by the out-of-the-box
Emacs distribution.

** Covered but not styled explicitly
   :PROPERTIES:
   :CUSTOM_ID: h:8ada963d-046d-4c67-becf-eee18595f902
   :END:

These do not require any extra styles because they are configured to
inherit from some basic faces.  Please confirm.

+ change-log
+ comint
+ bongo
+ log-edit
+ rmail

** Help needed
   :PROPERTIES:
   :CUSTOM_ID: h:bcc3f6f9-7ace-4e2a-8dbb-2bf55574dae5
   :END:

These are face groups that I am aware of but do not know how to access
or do not actively use.  I generally need to see how a face looks in its
context before assessing its aesthetics or specific requirements.

Use =M-x list-faces-display= to get these.

+ tty-menu

Note that the themes do provide support for =org-mode=, but some of
these interfaces have been decided based on indirect experience.  If you
encounter anything that does not "feel right", please let me know.

** Will NOT be supported
   :PROPERTIES:
   :CUSTOM_ID: h:46756fcc-0d85-4f77-b0e3-64f890e1c2ea
   :END:

I have thus far identified a single package that does fit into the
overarching objective of this project: [[https://github.com/hlissner/emacs-solaire-mode][solaire]].  It basically tries to
cast a less intense background on the main file-visiting buffers, so
that secondary elements like sidebars can have the default (pure
white/black) background.

/I will only support this package if it ever supports the inverse
effect/: less intense colours (but still accessible) for supportive
interfaces and the intended styles for the content you are actually
working on.

* Contributing
  :PROPERTIES:
  :CUSTOM_ID: h:25ba8d6f-6604-4338-b774-bbe531d467f6
  :END:

A few tasks you can help me with, sorted from the most probable to the
least likely:

+ Suggest refinements to packages that are covered.
+ Report packages not covered thus far.
+ Report bugs, inconsistencies, shortcomings.
+ Help expand the documentation of covered-but-not-styled packages.
+ Suggest refinements to the colour palette.
+ Help expand this document or any other piece of documentation.

It would be great if your feedback also includes some screenshots, GIFs,
or short videos.  Though this is not a requirement.

Whatever you do, please bear in mind the overarching objective of the
Modus themes: to keep a contrast ratio that is greater or equal to 7:1
between background and foreground colours.  If a compromise is ever
necessary between aesthetics and accessibility, it shall always be made
in the interest of latter.

* COPYING
  :PROPERTIES:
  :CUSTOM_ID: h:66652183-2fe0-46cd-b4bb-4121bad78d57
  :END:

The Modus Themes are distributed under the terms of the GNU General
Public License version 3 or, at your choice, any later version.  See the
COPYING file distributed in the [[https://gitlab.com/protesilaos/modus-themes][project's Git repository]].