#+TITLE:   ui/modeline
#+DATE:    July 29, 2018
#+SINCE:   v2.0.9
#+STARTUP: inlineimages

* Table of Contents :TOC_2:noexport:
- [[#description][Description]]
  - [[#module-flags][Module Flags]]
  - [[#plugins][Plugins]]
- [[#prerequisites][Prerequisites]]
- [[#usage][Usage]]
  - [[#hiding-the-modeline][Hiding the modeline]]
  - [[#switching-the-modeline-and-header-line][Switching the modeline and header line]]
- [[#configuration][Configuration]]
  - [[#changing-the-default-modeline][Changing the default modeline]]
  - [[#activating-a-format][Activating a format]]
  - [[#defining-a-modeline-format][Defining a modeline format]]
  - [[#defining-a-modeline-segment][Defining a modeline segment]]
  - [[#extracting-dooms-modeline-into-your-config][Extracting Doom's modeline into your config]]
- [[#troubleshooting][Troubleshooting]]
  - [[#where-are-my-minor-modes][Where are my minor modes?]]
  - [[#icons-in-my-modeline-look-strange][Icons in my modeline look strange]]
  - [[#the-right-side-of-the-modeline-is-cut-off][The right side of the modeline is cut off]]
- [[#appendix][Appendix]]
  - [[#autodefs][Autodefs]]
  - [[#variables][Variables]]
  - [[#faces][Faces]]

* Description
This module provides an Atom-inspired, minimalistic modeline for Doom Emacs,
powered by [[https://github.com/seagle0128/doom-modeline][the doom-modeline package]] (where you can find screenshots).

** Module Flags
+ =+light= Enables a lighter, less featureful version of the modeline that does
  not depend on ~doom-modeline~, which has performances issues in some cases.

** Plugins
+ [[https://github.com/seagle0128/doom-modeline][doom-modeline]]
+ [[https://github.com/syohex/emacs-anzu][anzu]]
+ [[https://github.com/syohex/emacs-evil-anzu][evil-anzu]]

* Prerequisites
This module has no prerequisites.

* Usage
** TODO Hiding the modeline

** TODO Switching the modeline and header line

* Configuration
** TODO Changing the default modeline

** TODO Activating a format

** TODO Defining a modeline format

** TODO Defining a modeline segment

** TODO Extracting Doom's modeline into your config

* Troubleshooting
** Where are my minor modes?
I rarely need to know what minor modes are active, so I removed them. ~M-x
doom/describe-active-minor-mode~ was written to substitute for it.

** TODO Icons in my modeline look strange
** TODO The right side of the modeline is cut off
I believe the consensus is: this is due to oversized icons, i.e. a font issue. Some possible solutions:

1. Tweak ~all-the-icons-scale-factor~ (1.2 by default): ~(setq
   all-the-icons-scale-factor 1.1)~

2. Add some padding to the modeline definition:

    #+begin_src elisp
    (after! doom-modeline
      (doom-modeline-def-modeline 'main
        '(bar matches buffer-info remote-host buffer-position parrot selection-info)
        '(misc-info minor-modes checker input-method buffer-encoding major-mode process vcs "  "))) ; <-- added padding here
    #+end_src

3. Use another font for the mode line (or a different ~:height~) (source)

    #+BEGIN_SRC elisp
    (custom-set-faces!
      '(mode-line :family "Noto Sans" :height 0.9)
      '(mode-line-inactive :family "Noto Sans" :height 0.9))
    #+END_SRC

(Mentioned in #1680, #278 and seagle0128/doom-modeline#334)

4. Change the width of icon characters in ~char-width-table~:
   
    #+BEGIN_SRC elisp
    (add-hook! 'doom-modeline-mode-hook
      (let ((char-table char-width-table))
        (while (setq char-table (char-table-parent char-table)))
        (dolist (pair doom-modeline-rhs-icons-alist)
          (let ((width 2)  ; <-- tweak this
                (chars (cdr pair))
                (table (make-char-table nil)))
            (dolist (char chars)
              (set-char-table-range table char width))
            (optimize-char-table table)
            (set-char-table-parent table char-table)
            (setq char-width-table table)))))
    #+END_SRC

   If this doesn't help, try different values for ~width~ such as ~width 1~ or ~width 3~. 

* Appendix
** Autodefs
+ ~def-modeline-format! NAME LEFT &optional RIGHT~
+ ~def-modeline-segment! NAME &rest REST~
+ ~set-modeline! NAME &optional DEFAULT~
** Variables
+ doom-modeline-height
+ doom-modeline-bar-width
+ doom-modeline-buffer-file-name-style
+ doom-modeline-icon
+ doom-modeline-major-mode-icon
+ doom-modeline-major-mode-color-icon
+ doom-modeline-buffer-state-icon
+ doom-modeline-buffer-modification-icon
+ doom-modeline-minor-modes
+ doom-modeline-enable-word-count
+ doom-modeline-buffer-encoding
+ doom-modeline-indent-info
+ doom-modeline-checker-simple-format
+ doom-modeline-vcs-max-length
+ doom-modeline-persp-name
+ doom-modeline-lsp
+ doom-modeline-github
+ doom-modeline-github-interval
+ doom-modeline-env-version
+ doom-modeline-mu4e
+ doom-modeline-irc
+ doom-modeline-irc-stylize
** Faces
+ doom-modeline-buffer-path
+ doom-modeline-buffer-file
+ doom-modeline-buffer-modified
+ doom-modeline-buffer-major-mode
+ doom-modeline-buffer-minor-mode
+ doom-modeline-project-parent-dir
+ doom-modeline-project-dir
+ doom-modeline-project-root-dir
+ doom-modeline-highlight
+ doom-modeline-panel
+ doom-modeline-debug
+ doom-modeline-info
+ doom-modeline-warning
+ doom-modeline-urgent
+ doom-modeline-unread-number
+ doom-modeline-bar
+ doom-modeline-inactive-bar
+ doom-modeline-evil-emacs-state
+ doom-modeline-evil-insert-state
+ doom-modeline-evil-motion-state
+ doom-modeline-evil-normal-state
+ doom-modeline-evil-operator-state
+ doom-modeline-evil-visual-state
+ doom-modeline-evil-replace-state
+ doom-modeline-persp-name
+ doom-modeline-persp-buffer-not-in-persp
