#+TITLE: Emacs Graphical Display Configuration
#+AUTHOR: Howard X. Abrams
#+DATE: 2020-09-10
#+FILETAGS: :emacs:
A literate programming file to configure the Emacs UI.
#+BEGIN_SRC emacs-lisp :exports none
;;; ha-display --- Emacs UI configuration. -*- lexical-binding: t; -*-
;;
;; © 2020-2022 Howard X. Abrams
;; This work is licensed under a Creative Commons Attribution 4.0 International License.
;; See http://creativecommons.org/licenses/by/4.0/
;;
;; Author: Howard X. Abrams <http://gitlab.com/howardabrams>
;; Maintainer: Howard X. Abrams
;; Created: September 10, 2020
;;
;; This file is not part of GNU Emacs.
;;
;; *NB:* Do not edit this file. Instead, edit the original literate file at:
;; ~/other/hamacs/ha-display.org
;; Using `find-file-at-point', and tangle the file to recreate this one .
;;
;;; Code:
#+END_SRC
* Dashboard
The [[https://github.com/emacs-dashboard/emacs-dashboard][emacs-dashboard]] project makes a nicer startup screen. It requires [[https://github.com/purcell/page-break-lines][page-break-lines]] (which is a nice project):
#+BEGIN_SRC emacs-lisp
(use-package page-break-lines)
#+END_SRC
And let’s make this Emacs look more like a fancy IDE with [[https://github.com/domtronn/all-the-icons.el][all-the-icons]]:
#+BEGIN_SRC emacs-lisp
(use-package all-the-icons
:if (display-graphic-p))
#+END_SRC
#+BEGIN_SRC emacs-lisp
(use-package dashboard
:init
(defun ha-dashboard-version ()
(let ((smaller-version (replace-regexp-in-string
(rx " (" (zero-or-more any) eol) "" (emacs-version))))
(string-replace "\n" "" smaller-version)))
(setq dashboard-banner-logo-title
(format "Emacs %s ⸺ %s"
(if (and (fboundp 'native-comp-available-p)
(native-comp-available-p))
"with Native Compilation" "")
(ha-dashboard-version))
dashboard-startup-banner "~/other/hamacs/support/levitating-gnu.png"
dashboard-center-content t
dashboard-set-init-info t
dashboard-projects-switch-function 'projectile-persp-switch-project
dashboard-items '((projects . 5)
;; (agenda . 5)
(bookmarks . 5)))
:config
(dashboard-setup-startup-hook)
(setq dashboard-footer-messages (list (ha--dad-joke))))
#+END_SRC
I would appreciate seeing if my Emacs installation has the features that I expect:
#+BEGIN_SRC emacs-lisp
(defun ha-hamacs-features (&optional iconic)
"Simple display of features I'm most keen about.
If ICONIC is non-nil, return a string of icons."
(interactive)
(let* ((png-icon (all-the-icons-material "image"))
(svg-icon (all-the-icons-alltheicon "svg"))
(tls-icon (all-the-icons-faicon "expeditedssl"))
(json-icon (all-the-icons-fileicon "jsx"))
(mag-icon (all-the-icons-faicon "magic"))
(jit-icon (all-the-icons-faicon "cog"))
(results (s-join " "
(list (when (and (fboundp 'native-comp-available-p)
(native-comp-available-p)) (if iconic jit-icon "Native-Compilation"))
(when (image-type-available-p 'svg) (if iconic svg-icon "SVG"))
(when (image-type-available-p 'png) (if iconic png-icon "PNG"))
(when (gnutls-available-p) (if iconic tls-icon "TLS"))
(when (json-available-p) (if iconic json-icon "JSON"))
(when (fboundp 'imagemagick-types) (if iconic mag-icon "ImageMagick"))))))
(if (called-interactively-p)
(message "Enabled features: %s" results)
results)))
#+END_SRC
* Mode Line
Let's install and load some of packages from the [[https://github.com/hlissner/doom-emacs][Doom Emacs]] project, like [[https://github.com/seagle0128/doom-modeline][doom-modeline]] and maybe the themes:
#+BEGIN_SRC emacs-lisp
(use-package doom-modeline
:init
(setq doom-modeline-minor-modes nil
doom-modeline-buffer-encoding nil
doom-modeline-percent-position nil)
:config
(doom-modeline-mode +1))
(use-package doom-themes)
#+END_SRC
* Find the Bloody Cursor
Large screen, lots of windows, so where is the cursor? While I used to use =hl-line+=, I found that the prolific [[https://protesilaos.com/][Protesilaos Stavrou]] [[https://protesilaos.com/codelog/2022-03-14-emacs-pulsar-demo/][introduced his Pulsar project]] is just what I need. Specifically, I might /loose the cursor/ and need to have it highlighted (using ~F6~), but also, this automatically highlights the cursor line with specific /actions/ , like changing windows.
#+BEGIN_SRC emacs-lisp
(use-package pulsar
:straight (:type git :protocol ssh :host gitlab :repo "protesilaos/pulsar")
:custom
(pulsar-pulse-functions '(recenter-top-bottom
move-to-window-line-top-bottom
reposition-window
bookmark-jump
other-window
delete-window
delete-other-windows
forward-page
backward-page
scroll-up-command
scroll-down-command
windmove-right
windmove-left
windmove-up
windmove-down
windmove-swap-states-right
windmove-swap-states-left
windmove-swap-states-up
windmove-swap-states-down
winum-select-window-1
winum-select-window-2
winum-select-window-3
winum-select-window-4
winum-select-window-5
winum-select-window-6
winum-select-window-7
winum-select-window-8
winum-select-window-9
winner-undo
winner-redo
tab-new
tab-close
tab-next
org-next-visible-heading
org-previous-visible-heading
org-forward-heading-same-level
org-backward-heading-same-level
outline-backward-same-level
outline-forward-same-level
outline-next-visible-heading
outline-previous-visible-heading
outline-up-heading))
(pulsar-face 'pulsar-magenta)
(pulsar-delay 0.055)
:bind ("<f6>" . pulsar-pulse-line))
#+END_SRC
* Themes
One does get used to a particular collection of colors. Mine is Tomorrow:
#+BEGIN_SRC emacs-lisp
(use-package color-theme-sanityinc-tomorrow)
#+END_SRC
Most of the time, Emacs is on my desk is a darkened room, so I choose the dark theme:
#+BEGIN_SRC emacs-lisp
(defun laptop-inside ()
(interactive)
(load-theme 'sanityinc-tomorrow-night t)
(set-face-attribute 'region nil :background "#000096")
(set-face-attribute 'mode-line nil :background "black")
(set-face-attribute 'mode-line-inactive nil :background "#333333"))
#+END_SRC
But, when feeling adventurous, I /sometimes/ take my laptop outside:
#+BEGIN_SRC emacs-lisp
(defun laptop-in-the-sun ()
(interactive)
(load-theme 'sanityinc-tomorrow-day t)
(set-face-attribute 'region nil :background "orange1")
(set-face-attribute 'mode-line nil :background "#cccccc")
(set-face-attribute 'mode-line-inactive nil :background "#888888"))
#+END_SRC
Oh, and turn off the line highlighting:
#+BEGIN_SRC emacs-lisp
(global-hl-line-mode -1)
#+END_SRC
And of course, the default is /inside/ where it is dark and safe:
#+BEGIN_SRC emacs-lisp
(laptop-inside)
#+END_SRC
* Full Size Frame
Taken from [[https://emacsredux.com/blog/2020/12/04/maximize-the-emacs-frame-on-startup/][this essay]], I figured I would start the initial frame automatically in fullscreen, but not any subsequent frames (as this could be part of the capturing system).
#+BEGIN_SRC emacs-lisp :tangle no
(add-to-list 'initial-frame-alist '(fullscreen . maximized))
#+END_SRC
* Font Configuration
Am I ever really ever satisfied with any font? I regularly change my font based on the monospace du jour... [[http://blogs.adobe.com/typblography/2012/09/source-code-pro.html][Source Code Pro]] is attractive, and has been a staple on every programmers' screen. However, we all want ligatures, [[https://github.com/i-tu/Hasklig][Hasklig]] is a nice font that is thinner and easier to read than [[https://github.com/tonsky/FiraCode][Fira]], but [[https://typeof.net/Iosevka/][Iosevka]] seems to have it all. Oh, Microsoft just gave us [[https://docs.microsoft.com/en-us/windows/terminal/cascadia-code][Cascadia]] and that seems shiny. However, the [[https://github.com/ryanoasis/nerd-fonts][Nerd Font project]] adds the ligatures as well as all the other niceties to a font.
** Choosing a Font
I stole the following idea from [[https://protesilaos.com/dotemacs/#h:9035a1ed-e988-4731-89a5-0d9e302c3dea][Protesilaos Stavrou's dotfile configuration]], and the following should minimally be /readable/:
| Similarities | Regular |
|--------------+----------------------------|
| ()[]{}<>«»‹› | ABCDEFGHIJKLMNOPQRSTUVWXYZ |
| 6bB8& | abcdefghijklmnopqrstuvwxyz |
| 0ODdoaoOQGC | 0123456789 |
| I1tilIJL | ~!@#$%^&*+ |
| !¡ij | `'"‘’“”.,;:… |
| 5$§SsS5 | ()[]{}—-_=<>/\ |
| 17ZzZ2 | ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩ |
| 9gqpG6 | αβγδεζηθικλμνξοπρστυφχψω |
| hnmMN | |
| uvvwWuuwvy | |
| x×X | #include <stdio.h> // <= quickly. |
| .,·°% | int main(int argc, char **argv) { |
| ¡!¿? | long il1[]={1-2/3.4,5+6==7/8}; |
| :; | int OxFaced=0xBAD||"[{(CQUINE"; |
| `''"‘’“” | unsigned O0,l1,Z2,S5,G6,B8__XY; |
| —-~≈=≠+*_ | printf("@$Hamburgefo%c`",'\n'); |
| …⋯ | return ~7&8^9?0:l1|!"j->k+=*w"; |
| ... | |
The following is from [[https://source-foundry.github.io/Hack/font-specimen.html][Hack's website]]:
#+BEGIN_SRC c
// The four boxing wizards jump
#include <stdio.h> // <= quickly.
int main(int argc, char **argv) {
long il1[]={1-2/3.4,5+6==7/8};
int OxFaced=0xBAD||"[{(CQUINE";
unsigned O0,l1,Z2,S5,G6,B8__XY;
printf("@$Hamburgefo%c`",'\n');
return ~7&8^9?0:l1|!"j->k+=*w";
}
#+END_SRC
To install a font, I use the following command on my Mac:
#+BEGIN_SRC sh
brew tap homebrew/cask-fonts
brew install --cask font-hack-nerd-font
#+END_SRC
** Specifying a Font
My /current/ favorite font is actually the top list of fonts that may be installed on my system (they usually are):
#+BEGIN_SRC emacs-lisp
(defvar ha-fixed-font
(when window-system
(cond
((x-list-fonts "Hack Nerd Font") "Hack Nerd Font")
((x-list-fonts "Cousine Nerd Font") "Cousine Nerd Font")
((x-list-fonts "Iosevka Nerd Font") "Iosevka Nerd Font")
((x-list-fonts "Iosevka") "Iosevka")
((x-list-fonts "FantasqueSansMono Nerd Font") "FantasqueSansMono Nerd Font")
((x-list-fonts "Monoid Nerd Font") "Monoid Nerd Font")
((x-list-fonts "Hasklig") "Hasklig")
((x-list-fonts "Cascadia Code PL") "Cascadia Code PL")
((x-list-fonts "Source Code Pro") "Source Code Pro")
((x-list-fonts "Anonymous Pro") "Anonymous Pro")
(t "monospaced")))
"My fixed width font based on what is installed, `nil' if not defined.")
#+END_SRC
Force something as well:
#+BEGIN_SRC emacs-lisp :tangle no
(setq ha-fixed-font "Hack Nerd Font")
#+END_SRC
I probably don't need to have such a ranking system, as chances are really good that I'll have all of them installed. Still.
#+BEGIN_SRC emacs-lisp
(defvar ha-variable-font
(when window-system
(cond ((x-list-fonts "Overpass") "Overpass")
((x-list-fonts "Source Sans Pro") "Source Sans Pro")
((x-list-fonts "Lucida Grande") "Lucida Grande")
((x-list-fonts "Verdana") "Verdana")
((x-family-fonts "Sans Serif") "Sans Serif")
(nil (warn "Cannot find a Sans Serif Font. Install Source Sans Pro."))))
"My variable width font available to org-mode files and whatnot.")
#+END_SRC
Simple function that gives me the font information based on the size I need. Recently updated after reading [[https://protesilaos.com/codelog/2020-09-05-emacs-note-mixed-font-heights/][this essay]], as I wanted my =fixed-pitch= to scale along with my =variable-pitch= font.
#+BEGIN_SRC emacs-lisp
(defun ha-set-favorite-font-size (size)
"Set the default font size as well as equalize the fixed and variable fonts."
(let ((fav-font (format "%s-%d" ha-fixed-font size)))
(set-face-attribute 'default nil :font fav-font)
(set-face-attribute 'fixed-pitch nil :family ha-fixed-font :inherit 'default :height 1.0)
(set-face-attribute 'variable-pitch nil :family ha-variable-font :inherit 'default :height 1.2)))
#+END_SRC
Define /interactive/ functions to quickly adjusting the font size based on my computing scenario:
#+BEGIN_SRC emacs-lisp
(defun ha-mac-monitor-fontsize ()
"Quickly set reset my font size when I connect my laptop to a monitor on a Mac."
(interactive)
(ha-set-favorite-font-size 16))
(defun ha-linux-monitor-fontsize ()
"Quickly set reset my font size when I connect my laptop to a monitor on Linux."
(interactive)
(ha-set-favorite-font-size 12))
(defun ha-mac-laptop-fontsize ()
"Quickly set reset my font size when I disconnect my laptop to a monitor from a Mac."
(interactive)
(ha-set-favorite-font-size 32))
(defun ha-linux-laptop-fontsize ()
"Quickly set reset my font size when I disconnect my laptop to a monitor from Linux."
(interactive)
(ha-set-favorite-font-size 14))
(defun ha-imac-fontsize ()
"Quickly set reset my font size when I am on my iMac."
(interactive)
(ha-set-favorite-font-size 16))
#+END_SRC
Which font to choose?
#+BEGIN_SRC emacs-lisp
(defun font-monitor-size-default ()
"Set the default size according to my preference."
(interactive)
(cond
((eq system-type 'gnu/linux) (ha-linux-monitor-fontsize))
((s-starts-with? "imac" system-name) (ha-imac-fontsize))
(t (ha-mac-monitor-fontsize))))
(defun font-laptop-size-default ()
"Set the default size according to my preference."
(interactive)
(if (eq system-type 'gnu/linux)
(ha-linux-laptop-fontsize)
(ha-mac-laptop-fontsize)))
(font-monitor-size-default)
#+END_SRC
** Zooming or Increasing Font Size
Do we want to increase the size of font in a single window (using =text-scale-increase=), or globally (using my new =font-size-increase=)?
Increase or decrease the set size of the face:
#+BEGIN_SRC emacs-lisp
(defun font-size-adjust (delta)
"Adjust the current frame's font size.
DELTA would be something like 1 or -1."
(interactive "nFont size difference: ")
(when (null delta) (setq delta 1))
(let* ((font-family (face-attribute 'default :font))
(font-size (font-get font-family :size))
(new-size (+ delta font-size)))
(ha-set-favorite-font-size new-size)))
(defun font-size-increase ()
"Increase the `default' font size of all frames."
(interactive)
(font-size-adjust 1))
(defun font-size-decrease ()
"Decrease the `default' font size of all frames."
(interactive)
(font-size-adjust -1))
#+END_SRC
And some keybindings to call them:
#+BEGIN_SRC emacs-lisp
(global-set-key (kbd "s-+") 'font-size-increase)
(global-set-key (kbd "s-=") 'font-size-increase)
(global-set-key (kbd "s--") 'font-size-decrease)
(global-set-key (kbd "s-0") 'font-size-monitor-default)
(global-set-key (kbd "s-9") 'font-size-laptop-default)
#+END_SRC
* Emojis, Icons and Whatnot
In Emacs 28.1, we have better Unicode 14 support. Which means, we need to install [[https://github.com/googlefonts/noto-emoji][Noto Color Emoji]]. Currently, my systems, seems to work just fine, but I’m leaving this code here in case I have issues, as I might use what Apple supplies when on a Mac (thanks [[http://xahlee.info/emacs/emacs/emacs_list_and_set_font.html][Xah Lee]]):
#+BEGIN_SRC emacs-lisp
;; set font for symbols
(set-fontset-font t 'symbol
(cond
((string-equal system-type "darwin")
(cond
((member "Apple Symbols" (font-family-list)) "Apple Symbols")))
((string-equal system-type "gnu/linux")
(cond
((member "Symbola" (font-family-list)) "Symbola")))))
;; set font for emoji (should come after setting symbols)
(set-fontset-font t 'emoji
(cond
((member "Apple Color Emoji" (font-family-list)) "Apple Color Emoji")
((member "Noto Color Emoji" (font-family-list)) "Noto Color Emoji")
((member "Symbola" (font-family-list)) "Symbola")))
#+END_SRC
Test this out: 😄 😱 😸 👸 👽 🙋
Not use what I'm doing with the [[https://github.com/domtronn/all-the-icons.el][all-the-icons]] package, but the Doom Modeline uses much of this.
#+BEGIN_SRC emacs-lisp
(use-package all-the-icons)
#+END_SRC
*Note:* Install everything with the function, =all-the-icons-install-fonts=.
* Ligatures
Seems like getting ligatures to work in Emacs has been a Holy Grail. On Mac, I've used special builds that have hacks, but now with Emacs 27 and Harfbuzz, I should be able to get --> to look like it should.
#+BEGIN_SRC emacs-lisp :tangle no
(setq prettify-symbols-unprettify-at-point 'right-edge)
(global-prettify-symbols-mode +1)
(prettify-symbols-mode +1)
#+END_SRC
Note, in Doom, is appears we have a =ligatures= module.
We'll start using that instead, but changing it in [[file:general-programming.org][general-programming]] file.
* Technical Artifacts :noexport:
Let's provide a name so that the file can be required:
#+BEGIN_SRC emacs-lisp :exports none
(provide 'ha-display)
;;; ha-display.el ends here
#+END_SRC
Before you can build this on a new system, make sure that you put the cursor over any of these properties, and hit: ~C-c C-c~
#+DESCRIPTION: A literate programming file to configure the Emacs UI.
#+PROPERTY: header-args:sh :tangle no
#+PROPERTY: header-args:emacs-lisp :tangle yes
#+PROPERTY: header-args :results none :eval no-export :comments no :mkdirp yes
#+OPTIONS: num:nil toc:nil todo:nil tasks:nil tags:nil date:nil
#+OPTIONS: skip:nil author:nil email:nil creator:nil timestamp:nil
#+INFOJS_OPT: view:nil toc:nil ltoc:t mouse:underline buttons:0 path:http://orgmode.org/org-info.js