spacemacs/layers/+themes/colors

Colors layer

• Description
• Install
• Configuration
  • Colorize identifiers
  • Enable Nyan cat
• Key bindings
  • Colorize Identifiers
  • Rainbow Mode
  • Nyan Mode

Description

This layer colors your life with the help of the following packages:

• rainbow-identifiers mode will colorize all identifiers (christmas tree mode :-)) with mostly unique colors, and the ability to choose saturation and lightness.
• color-identifiers mode will colorize only identifiers recognized as variables.
• rainbow-mode displays strings representing colors with the color they represent as background.
• nyan-mode display a Nyan cat progress bar in the mode-line.

Install

To use this configuration layer, add it to your ~/.spacemacs. You will need to add colors to the existing dotspacemacs-configuration-layers list in this file.

Configuration

Colorize identifiers

To colorize variable identifiers using color-identifiers and its supported languages, set the layer variable colors-colorize-identifiers to variables.

If you want to colorize all identifiers using the more universal rainbow-identifiers method instead, set the layer variable colors-colorize-identifiers to all.

  (setq-default dotspacemacs-configuration-layers '(
    (colors :variables colors-colorize-identifiers 'all)))

When using the value all (rainbow-identifiers method), the Saturation and Lightness used for colors can be set on a per-theme basis by adding an entry to the variable colors-theme-identifiers-sat&light. This is an alist where the key is a theme symbol and the value is a pair (saturation lightness).

For now, saturation and lightness are not supported via a variables value! Instead, you must push themes into the alist in your dotspacemacs/user-config section, and then refresh the values to ensure your overrides are applied to your current theme.

Two handy built-in functions makes both of those steps very easy.

Example:

  (defun dotspacemacs/user-config ()
    ;; add per-theme sat&light overrides and refresh values for your current theme
    (colors/add-theme-sat&light 'mytheme '(50 50))
    (colors/add-theme-sat&light 'anothertheme '(90 40))
    (colors/refresh-theme-look)
    )

For all themes that lack per-theme overrides, it uses default saturation and lightness. You can configure your own defaults via colors-default-rainbow-identifiers-sat and colors-default-rainbow-identifiers-light, which can be set via variables.

  (setq-default dotspacemacs-configuration-layers '(
    (colors :variables
      colors-colorize-identifiers 'all
      colors-default-rainbow-identifiers-sat 42
      colors-default-rainbow-identifiers-light 86)
    )

Enable Nyan cat

To enable the package nyan-mode just set the variable colors-enable-nyan-cat-progress-bar to t:

  (setq-default dotspacemacs-configuration-layers '(
    (colors :variables colors-enable-nyan-cat-progress-bar t)))

It may be handy to enable it only when Emacs is running in a GUI. You can do that by using a quasi-quoted list which checks the Emacs mode:

  (setq-default dotspacemacs-configuration-layers '(
    (colors :variables
            colors-enable-nyan-cat-progress-bar (display-graphic-p))))

Key bindings

Colorize Identifiers

Key Binding	Description
SPC t C a	colorize all identifiers in current buffer (rainbow-identifiers mode)
SPC t C C-a	globally colorize all identifiers and all subsequent buffers
SPC t C v	colorize only variables in current buffer (color-identifiers mode)
SPC t C C-v	globally colorize only variables and all subsequent buffers

The saturation and lightness of rainbow-identifier mode's colors can be adjusted live via the following transient-state:

Key Binding	Description
SPC C i s	initiate change saturation mini-mode
SPC C i l	initiate change lightness mini-mode
+	increase the saturation or lightness
-	decrease the saturation or lightness
=	reset the saturation or lightness
Any other key	leave the change mini-mode

Rainbow Mode

rainbow-mode mode is different from both rainbow-identifiers and color-identifiers. It can be used together with either (or none) of the identifier colorizers.

All detected color codes in the current buffer will be be highlighted as their actual color. However, for accurate display, this mode requires that you use GUI Emacs and that you haven't disabled sRGB mode (if your platform uses that).

To enable, you must manually toggle it on and off on a per-buffer basis with:

SPC t C c

Nyan Mode

nyan-mode mode can be toggled on and off with:

SPC t m n

Note that the toggle is local to the current buffer.