GNU-devel ELPA - standard-themes

Copyright (C) 2022-2023 Free Software Foundation, Inc.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with the Front-Cover Texts being “A GNU Manual,” and with the Back-Cover Texts as in (a) below. A copy of the license is included in the section entitled “GNU Free Documentation License.”

(a) The FSF’s Back-Cover Text is: “You have the freedom to copy and modify this GNU manual.”

The standard-themes are a pair of light and dark themes for GNU Emacs. They emulate the out-of-the-box looks of Emacs (which technically do NOT constitute a theme) while bringing to them thematic consistency, customizability, and extensibility.

The standard-themes provide user options which tweak secondary aspects of the theme. All customizations need to be evaluated before loading a theme. Any change after the theme has been loaded requires a re-load (Loading a theme).

Emacs can load and maintain enabled multiple themes at once. This typically leads to awkward styling and weird combinations. The theme looks broken and the designer’s intent is misunderstood. Before loading either of the standard-themes, the user is encouraged to disable all others (Disable other themes):

(mapc #'disable-theme custom-enabled-themes)

Then load the theme of choice. For example:

(load-theme 'standard-light :no-confirm)

The :no-confirm is optional. It simply skips the step where Emacs asks the user whether they are sure about loading the theme.

Consider adding code like the above to the user configuration file, such as init.el.

As the Standard themes are extensible, another way to load the theme of choice is to use either standard-themes-load-dark or standard-themes-load-light. These functions take care to (i) disable other themes, (ii) load the specified Standard theme, and (iii) run the standard-themes-post-load-hook which is useful for do-it-yourself customizations (The general approach to DIY changes). These two functions are also called by the command standard-themes-toggle.

The command standard-themes-preview-colors uses minibuffer completion to select an item from the Standard themes and then produces a buffer with previews of its color palette entries. The buffer has a naming scheme which reflects the given choice, like standard-light-preview-colors for the standard-light theme.

The command standard-themes-preview-colors-current skips the minibuffer selection process and just produces a preview for the current Standard theme.

When called with a prefix argument (C-u with the default key bindings), these commands will show a preview of the palette’s semantic color mappings instead of the named colors.

Aliases for those commands are standard-themes-list-colors and standard-themes-list-colors-current.

Overrides to color values are reflected in the buffers produced by the aforementioned commands (Palette overrides).

Each row shows a foreground and background coloration using the underlying value it references. For example a line with #b3303a (a shade of red) will show red text followed by a stripe with that same color as a backdrop.

The name of the buffer describes the given Standard theme and what the contents are, such as *standard-light-list-colors* for named colors and =*standard-light-list-mappings* for the semantic color mappings.

Advanced users may want to call color variables from the palette of the active Standard theme. The macro standard-themes-with-colors supplies those to any form called inside of it. For example:

(standard-themes-with-colors
  (list bg-main fg-main bg-mode-line))
;; => ("#ffffff" "#000000" "#b3b3b3")

The above return value is for standard-light when that is the active Standard theme. Switching to standard-dark and evaluating this code anew will give us the relevant results for that theme:

(standard-themes-with-colors
  (list bg-main fg-main bg-mode-line cursor))
;; => ("#000000" "#ffffff" "#505050")

Do-It-Yourself customizations.

The palette of each Standard theme is considered stable. No removals shall be made. Though please note that some tweaks to individual hues or color mapping are still possible. At any rate, we will not outright break any code that uses standard-themes-with-colors.

This section shows how the user can tweak the Standard themes to their liking, often by employing the standard-themes-with-colors macro (Use colors from the active Standard theme).

The themes define some faces to make it possible to achieve consistency between various groups of faces. For example, all “marks for selection” use the standard-themes-mark-select face. If, say, the user wants to edit this face to include an underline, the change will apply to lots of packages, like Dired, Trashed, Ibuffer.

Do-It-Yourself customizations.

All the faces defined by the themes:

• standard-themes-bold
• standard-themes-fixed-pitch
• standard-themes-fringe-error
• standard-themes-fringe-info
• standard-themes-fringe-warning
• standard-themes-heading-0
• standard-themes-heading-1
• standard-themes-heading-2
• standard-themes-heading-3
• standard-themes-heading-4
• standard-themes-heading-5
• standard-themes-heading-6
• standard-themes-heading-7
• standard-themes-heading-8
• standard-themes-intense-blue
• standard-themes-intense-cyan
• standard-themes-intense-green
• standard-themes-intense-magenta
• standard-themes-intense-red
• standard-themes-intense-yellow
• standard-themes-italic
• standard-themes-key-binding
• standard-themes-mark-delete
• standard-themes-mark-other
• standard-themes-mark-select
• standard-themes-nuanced-blue
• standard-themes-nuanced-cyan
• standard-themes-nuanced-green
• standard-themes-nuanced-magenta
• standard-themes-nuanced-red
• standard-themes-nuanced-yellow
• standard-themes-prompt
• standard-themes-subtle-blue
• standard-themes-subtle-cyan
• standard-themes-subtle-green
• standard-themes-subtle-magenta
• standard-themes-subtle-red
• standard-themes-subtle-yellow
• standard-themes-ui-variable-pitch
• standard-themes-underline-error
• standard-themes-underline-info
• standard-themes-underline-warning

The standard-themes will only ever support a curated list of packages based on my judgement (Packages that are hard to support). Nevertheless, the list of explicitly or implicitly supported packages already covers everything most users need.

This project is meant to be a collective effort. Every bit of help matters.

Author/maintainer

Protesilaos Stavrou.

Contributions to code

Clemens Radermacher.

Ideas and/or user feedback

Filippo Argiolas, Fritz Grabo, Manuel Uberti, Tassilo Horn, Zack Weinberg.

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