refactor(emacs-pkgs): Extract term-switcher into separate emacs pkg
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3 changed files with 86 additions and 36 deletions
14
tools/emacs-pkgs/term-switcher/default.nix
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tools/emacs-pkgs/term-switcher/default.nix
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{ pkgs, ... }:
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with pkgs.third_party.emacsPackagesNg;
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melpaBuild rec {
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pname = "term-switcher";
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version = "1.0";
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src = ./term-switcher.el;
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packageRequires = [ dash ivy s ];
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recipe = builtins.toFile "recipe" ''
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(term-switcher :fetcher github :repo "tazjin/depot")
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'';
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}
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72
tools/emacs-pkgs/term-switcher/term-switcher.el
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tools/emacs-pkgs/term-switcher/term-switcher.el
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;;; term-switcher.el --- Easily switch between open X11 terminals
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;;
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;; Copyright (C) 2019 Google Inc.
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;;
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;; Author: Vincent Ambo <tazjin@google.com>
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;; Version: 1.0
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;; Package-Requires: (dash ivy s)
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;;
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;;; Commentary:
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;;
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;; This package adds a function that lets users quickly switch between
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;; different open X11 terminals using ivy.
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;;
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;; It is primarily intended to be used by EXWM users who use graphical
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;; terminals inside of Emacs.
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;;
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;; Users MUST configure the group `term-switcher' and can then bind
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;; `ts/switch-to-terminal' to an appropriate key.
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(require 'dash)
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(require 'ivy)
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(require 's)
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(defgroup term-switcher nil
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"Customization options for configuring `term-switcher' with the
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user's terminal emulator of choice.")
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(defcustom term-switcher-program "gnome-terminal"
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"X11 terminal application to use."
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:type '(string)
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:group 'term-switcher)
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(defcustom term-switcher-buffer-prefix "Term"
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"String prefix for X11 terminal buffers. For example, if your
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EXWM configuration renames X11 terminal buffers to
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`Term</foo/bar>' you might want to use `Term' as the matching
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prefix."
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:type '(string)
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:group 'term-switcher)
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(defun ts/run-terminal-program ()
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(message "Starting %s..." term-switcher-program)
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(start-process-shell-command term-switcher-program nil term-switcher-program))
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(defun ts/open-or-create-terminal-buffer (buffer-name)
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"Switch to the buffer with BUFFER-NAME or create a new buffer
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running the configured X11 terminal."
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(let ((buffer (get-buffer buffer-name)))
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(if (not buffer)
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(ts/run-terminal-program)
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(switch-to-buffer buffer))))
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(defun ts/is-terminal-buffer (buffer)
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"Determine whether BUFFER runs an X11 terminal."
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(and (equal 'exwm-mode (buffer-local-value 'major-mode buffer))
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(s-starts-with? term-switcher-buffer-prefix (buffer-name buffer))))
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(defun ts/switch-to-terminal ()
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"Switch to an X11 terminal buffer, or create a new one."
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(interactive)
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(let ((terms (-map #'buffer-name
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(-filter #'ts/is-terminal-buffer (buffer-list)))))
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(if terms
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(ivy-read "Switch to terminal buffer: "
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(cons "New terminal" terms)
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:caller 'ts/switch-to-terminal
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:preselect (s-concat "^" term-switcher-buffer-prefix)
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:require-match t
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:action #'ts/open-or-create-terminal-buffer)
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(ts/run-terminal-program))))
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(provide 'term-switcher)
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@ -1,36 +0,0 @@
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;; Utilities for X11 terminal buffers.
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(defvar x11-terminal-program "gnome-terminal"
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"Which X11 terminal application to use.")
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(defvar x11-terminal-buffer-prefix "Term"
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"String prefix for X11 terminal buffer names.")
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(defun open-or-create-terminal-buffer (buffer-name)
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"Switch to the buffer with BUFFER-NAME or create a new buffer
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running the configured X11 terminal."
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(let ((buffer (get-buffer buffer-name)))
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(if (not buffer)
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(run-external-command x11-terminal-program)
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(switch-to-buffer buffer))))
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(defun is-terminal-buffer (buffer)
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"Determine whether BUFFER runs an X11 terminal."
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(and (equal 'exwm-mode (buffer-local-value 'major-mode buffer))
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(s-starts-with? x11-terminal-buffer-prefix (buffer-name buffer))))
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(defun counsel-switch-to-terminal ()
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"Switch to an X11 terminal buffer, or create a new one."
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(interactive)
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(let ((terms (-map #'buffer-name
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(-filter #'is-terminal-buffer (buffer-list)))))
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(if terms
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(ivy-read "Switch to terminal buffer: "
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(cons "New terminal" terms)
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:caller 'counsel-switch-to-terminal
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:preselect (s-concat "^" x11-terminal-buffer-prefix)
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:require-match t
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:action #'open-or-create-terminal-buffer)
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(run-external-command x11-terminal-program))))
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(provide 'term-setup)
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