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Diffstat (limited to 'users/wpcarro/emacs/.emacs.d/wpc/window-manager.el')
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diff --git a/users/wpcarro/emacs/.emacs.d/wpc/window-manager.el b/users/wpcarro/emacs/.emacs.d/wpc/window-manager.el new file mode 100644 index 000000000000..6030461da61b --- /dev/null +++ b/users/wpcarro/emacs/.emacs.d/wpc/window-manager.el @@ -0,0 +1,354 @@ +;;; window-manager.el --- Functions augmenting my usage of EXWM -*- lexical-binding: t -*- + +;; Author: William Carroll <wpcarro@gmail.com> +;; Version: 0.0.1 +;; URL: https://git.wpcarro.dev/wpcarro/briefcase +;; Package-Requires: ((emacs "25.1")) + +;;; Commentary: +;; I switched to EXWM from i3, and I haven't looked back. One day I may write a +;; poem declaring my love for Emacs and EXWM. For now, I haven't the time. + +;; Wish list: +;; - TODO: Support different startup commands and layouts depending on laptop or +;; desktop. +;; - TODO: Support a Music named-workspace. + +;;; Code: + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Dependencies +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(require 'alert) +(require 'al) +(require 'prelude) +(require 'string) +(require 'cycle) +(require 'set) +(require 'kbd) +(require 'ivy-helpers) +(require 'display) +(require 'vterm-mgt) +(require 'dash) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Library +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +;; TODO: Associate `window-purpose' window-layouts with each of these named +;; workspaces. + +;; TODO: Associate KBDs for each of these named-layouts. + +;; TODO: Decide between window-manager, exwm, or some other namespace. + +;; TODO: Support (cycle-from-list '(current previous)) to toggle back and forth +;; between most recent workspace. + +;; TODO: Support ad hoc cycle for loading a few workspaces that can be cycled +;; between. (cycle-from-list '("Project" "Workspace")) + +;; TODO: Consider supporting a workspace for Racket, Clojure, Common Lisp, +;; Haskell, Elixir, and a few other languages. These could behave very similarly +;; to repl.it, which I've wanted to have locally for awhile now. + +;; TODO: Support MRU cache of workspaces for easily switching back-and-forth +;; between workspaces. + +(cl-defstruct window-manager--named-workspace label kbd display) + +(defconst window-manager--install-kbds? t + "When t, install the keybindings to switch between named-workspaces.") + +;; TODO: Consume `cache/touch' after changing workspaces. Use this to enable +;; cycling through workspaces. + +(defconst window-manager--named-workspaces + (list (make-window-manager--named-workspace + :label "Web Browsing" + :kbd "c" + :display display-4k-horizontal) + (make-window-manager--named-workspace + :label "Coding" + :kbd "d" + :display display-4k-horizontal) + (make-window-manager--named-workspace + :label "Vertical" + :kbd "h" + :display display-4k-vertical) + (make-window-manager--named-workspace + :label "Laptop" + :kbd "p" + :display display-laptop)) + "List of `window-manager--named-workspace' structs.") + +;; Assert that no two workspaces share KBDs. +(prelude-assert (= (list-length window-manager--named-workspaces) + (->> window-manager--named-workspaces + (list-map #'window-manager--named-workspace-kbd) + set-from-list + set-count))) + +(defun window-manager--alert (x) + "Message X with a structured format." + (alert (string-concat "[exwm] " x))) + +;; Use Emacs as my primary window manager. +(use-package exwm + :config + (require 'exwm-config) + + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + ;; Multiple Displays + ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + (require 'exwm-randr) + (exwm-randr-enable) + (setq exwm-randr-workspace-monitor-plist + (->> window-manager--named-workspaces + (-map-indexed (lambda (i x) + (list i (window-manager--named-workspace-display x)))) + -flatten)) + (setq exwm-workspace-number (list-length window-manager--named-workspaces)) + (setq exwm-input-simulation-keys + ;; TODO: Consider supporting M-d and other readline style KBDs. + '(([?\C-b] . [left]) + ([?\M-b] . [C-left]) + ([?\C-f] . [right]) + ([?\M-f] . [C-right]) + ([?\C-p] . [up]) + ([?\C-n] . [down]) + ([?\C-a] . [home]) + ([?\C-e] . [end]) + ([?\C-d] . [delete]) + ;; TODO: Assess whether or not this is a good idea. + ;; TODO: Ensure C-c copies. + ([?\C-c] . [C-c]))) + (exwm-enable)) + +;; Here is the code required to allow EXWM to cycle workspaces. +(defconst window-manager--workspaces + (->> window-manager--named-workspaces + cycle-from-list) + "Cycle of the my EXWM workspaces.") + +(prelude-assert + (= exwm-workspace-number + (list-length window-manager--named-workspaces))) + +(defun window-manager-next-workspace () + "Cycle forwards to the next workspace." + (interactive) + (window-manager--change-workspace (cycle-next window-manager--workspaces))) + +(defun window-manager-prev-workspace () + "Cycle backwards to the previous workspace." + (interactive) + (window-manager--change-workspace (cycle-prev window-manager--workspaces))) + +;; TODO: Create friendlier API for working with EXWM. + +;; Here is the code required to toggle EXWM's modes. +(defun window-manager--line-mode () + "Switch exwm to line-mode." + (call-interactively #'exwm-input-grab-keyboard) + (window-manager--alert "Switched to line-mode")) + +(defun window-manager--char-mode () + "Switch exwm to char-mode." + (call-interactively #'exwm-input-release-keyboard) + (window-manager--alert "Switched to char-mode")) + +(defconst window-manager--modes + (cycle-from-list (list #'window-manager--char-mode + #'window-manager--line-mode)) + "Functions to switch exwm modes.") + +(defun window-manager-toggle-mode () + "Switch between line- and char- mode." + (interactive) + (with-current-buffer (window-buffer) + (when (eq major-mode 'exwm-mode) + (funcall (cycle-next window-manager--modes))))) + +;; Ensure exwm apps open in char-mode. +(add-hook 'exwm-manage-finish-hook #'window-manager--char-mode) + +;; Interface to the Linux password manager +;; TODO: Consider writing a better client for this. +(use-package ivy-pass) + +;; TODO: How do I handle this dependency? +(defconst window-manager--preferred-browser "google-chrome" + "My preferred web browser.") + +;; TODO: Consider replacing the `ivy-read' call with something like `hydra' that +;; can provide a small mode for accepting user-input. +;; TODO: Put this somewhere more diliberate. + +;; TODO: Configure the environment variables for xsecurelock so that the font is +;; smaller, different, and the glinux wallpaper doesn't show. +;; - XSECURELOCK_FONT="InputMono-Black 10" +;; - XSECURE_SAVER="" +;; - XSECURE_LOGO_IMAGE="" +;; Maybe just create a ~/.xsecurelockrc +;; TODO: Is there a shell-command API that accepts an alist and serializes it +;; into variables to pass to the shell command? +(defconst window-manager--xsecurelock + "/usr/share/goobuntu-desktop-files/xsecurelock.sh" + "Path to the proper xsecurelock executable. +The other path to xsecurelock is /usr/bin/xsecurelock, which works fine, but it +is not optimized for Goobuntu devices. Goobuntu attempts to check a user's +password using the network. When there is no network connection available, the +login attempts fail with an \"unknown error\", which isn't very helpful. To +avoid this, prefer the goobuntu wrapper around xsecurelock when on a goobuntu +device. This all relates to PAM (i.e. pluggable authentication modules).") + +(defun window-manager-logout () + "Prompt the user for options for logging out, shutting down, etc. + +The following options are supported: +- Lock +- Logout +- Suspend +- Hibernate +- Reboot +- Shutdown + +Ivy is used to capture the user's input." + (interactive) + (let* ((name->cmd `(("Lock" . + (lambda () + (shell-command window-manager--xsecurelock))) + ("Logout" . + (lambda () + (let ((default-directory "/sudo::")) + (shell-command "systemctl stop lightdm")))) + ("Suspend" . + (lambda () + (shell-command "systemctl suspend"))) + ("Hibernate" . + (lambda () + (shell-command "systemctl hibernate"))) + ("Reboot" . + (lambda () + (let ((default-directory "/sudo::")) + (shell-command "reboot")))) + ("Shutdown" . + (lambda () + (let ((default-directory "/sudo::")) + (shell-command "shutdown now"))))))) + (funcall + (lambda () + (funcall (al-get (ivy-read "System: " (al-keys name->cmd)) + name->cmd)))))) + +(defun window-manager--label->index (label workspaces) + "Return the index of the workspace in WORKSPACES named LABEL." + (let ((index (-elem-index label (-map #'window-manager--named-workspace-label + workspaces)))) + (if index index (error (format "No workspace found for label: %s" label))))) + +(defun window-manager--register-kbd (workspace) + "Registers a keybinding for WORKSPACE struct. +Currently using super- as the prefix for switching workspaces." + (let ((handler (lambda () + (interactive) + (window-manager--switch + (window-manager--named-workspace-label workspace)))) + (key (window-manager--named-workspace-kbd workspace))) + (exwm-input-set-key + (kbd-for 'workspace key) + handler))) + +(defun window-manager--change-workspace (workspace) + "Switch EXWM workspaces to the WORKSPACE struct." + (exwm-workspace-switch + (window-manager--label->index + (window-manager--named-workspace-label workspace) + window-manager--named-workspaces)) + (window-manager--alert + (string-format "Switched to: %s" + (window-manager--named-workspace-label workspace)))) + +(defun window-manager--switch (label) + "Switch to a named workspaces using LABEL." + (cycle-focus (lambda (x) + (equal label + (window-manager--named-workspace-label x))) + window-manager--workspaces) + (window-manager--change-workspace (cycle-current window-manager--workspaces))) + +(exwm-input-set-key (kbd "C-S-f") #'window-manager-toggle-previous) + +(defun window-manager-toggle-previous () + "Focus the previously active EXWM workspace." + (interactive) + (window-manager--change-workspace + (cycle-focus-previous! window-manager--workspaces))) + +(defun window-manager--exwm-buffer? (x) + "Return t if buffer X is an EXWM buffer." + (equal 'exwm-mode (buffer-local-value 'major-mode x))) + +(defun window-manager--application-name (buffer) + "Return the name of the application running in the EXWM BUFFER. +This function asssumes that BUFFER passes the `window-manager--exwm-buffer?' +predicate." + (with-current-buffer buffer exwm-class-name)) + +;; TODO: Support disambiguating between two or more instances of the same +;; application. For instance if two `exwm-class-name' values are +;; "Google-chrome", find a encode this information in the `buffer-alist'. +(defun window-manager-switch-to-exwm-buffer () + "Use `completing-read' to focus an EXWM buffer." + (interactive) + (let* ((buffer-alist (->> (buffer-list) + (-filter #'window-manager--exwm-buffer?) + (-map + (lambda (buffer) + (cons (window-manager--application-name buffer) + buffer))))) + (label (completing-read "Switch to EXWM buffer: " buffer-alist))) + (exwm-workspace-switch-to-buffer + (al-get label buffer-alist)))) + +(when window-manager--install-kbds? + (progn + (->> window-manager--named-workspaces + (list-map #'window-manager--register-kbd)) + (window-manager--alert "Registered workspace KBDs!"))) + +(defun window-manager-current-workspace () + "Output the label of the currently active workspace." + (->> window-manager--workspaces + cycle-current + window-manager--named-workspace-label)) + +(defun window-manager-swap-workspaces () + "Prompt the user to switch the current workspace with another." + (interactive) + (let* ((selection (->> window-manager--named-workspaces + (-map #'window-manager--named-workspace-label) + (-reject + (lambda (x) + (s-equals? x (window-manager-current-workspace)))) + (completing-read + (format "Swap current workspace (i.e. \"%s\") with: " + (window-manager-current-workspace))))) + (i (-find-index (lambda (x) + (s-equals? selection (window-manager--named-workspace-label x))) + window-manager--named-workspaces))) + (exwm-workspace-swap exwm-workspace--current (elt exwm-workspace--list i)))) + +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +;; Startup Applications in `window-manager--named-workspaces' +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +(add-hook 'exwm-init-hook + (lambda () + (display-arrange-primary) + (window-manager--switch "Coding"))) + +(provide 'window-manager) +;;; window-manager.el ends here |