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;;; exwm-config.el --- Predefined configurations  -*- lexical-binding: t -*-

;; Copyright (C) 2015-2020 Free Software Foundation, Inc.

;; Author: Chris Feng <chris.w.feng@gmail.com>

;; This file is part of GNU Emacs.

;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.

;;; Commentary:

;; This module contains typical (yet minimal) configurations of EXWM.

;;; Code:

(require 'exwm)
(require 'ido)

(defun exwm-config-default ()
  "Default configuration of EXWM."
  ;; Set the initial workspace number.
  (unless (get 'exwm-workspace-number 'saved-value)
    (setq exwm-workspace-number 4))
  ;; Make class name the buffer name
  (add-hook 'exwm-update-class-hook
            (lambda ()
              (exwm-workspace-rename-buffer exwm-class-name)))
  ;; Global keybindings.
  (unless (get 'exwm-input-global-keys 'saved-value)
    (setq exwm-input-global-keys
          `(
            ;; 's-r': Reset (to line-mode).
            ([?\s-r] . exwm-reset)
            ;; 's-w': Switch workspace.
            ([?\s-w] . exwm-workspace-switch)
            ;; 's-&': Launch application.
            ([?\s-&] . (lambda (command)
                         (interactive (list (read-shell-command "$ ")))
                         (start-process-shell-command command nil command)))
            ;; 's-N': Switch to certain workspace.
            ,@(mapcar (lambda (i)
                        `(,(kbd (format "s-%d" i)) .
                          (lambda ()
                            (interactive)
                            (exwm-workspace-switch-create ,i))))
                      (number-sequence 0 9)))))
  ;; Line-editing shortcuts
  (unless (get 'exwm-input-simulation-keys 'saved-value)
    (setq exwm-input-simulation-keys
          '(([?\C-b] . [left])
            ([?\C-f] . [right])
            ([?\C-p] . [up])
            ([?\C-n] . [down])
            ([?\C-a] . [home])
            ([?\C-e] . [end])
            ([?\M-v] . [prior])
            ([?\C-v] . [next])
            ([?\C-d] . [delete])
            ([?\C-k] . [S-end delete]))))
  ;; Enable EXWM
  (exwm-enable)
  ;; Configure Ido
  (exwm-config-ido)
  ;; Other configurations
  (exwm-config-misc))

(defun exwm-config--fix/ido-buffer-window-other-frame ()
  "Fix `ido-buffer-window-other-frame'."
  (defalias 'exwm-config-ido-buffer-window-other-frame
    (symbol-function #'ido-buffer-window-other-frame))
  (defun ido-buffer-window-other-frame (buffer)
    "This is a version redefined by EXWM.

You can find the original one at `exwm-config-ido-buffer-window-other-frame'."
    (with-current-buffer (window-buffer (selected-window))
      (if (and (derived-mode-p 'exwm-mode)
               exwm--floating-frame)
          ;; Switch from a floating frame.
          (with-current-buffer buffer
            (if (and (derived-mode-p 'exwm-mode)
                     exwm--floating-frame
                     (eq exwm--frame exwm-workspace--current))
                ;; Switch to another floating frame.
                (frame-root-window exwm--floating-frame)
              ;; Do not switch if the buffer is not on the current workspace.
              (or (get-buffer-window buffer exwm-workspace--current)
                  (selected-window))))
        (with-current-buffer buffer
          (when (derived-mode-p 'exwm-mode)
            (if (eq exwm--frame exwm-workspace--current)
                (when exwm--floating-frame
                  ;; Switch to a floating frame on the current workspace.
                  (frame-selected-window exwm--floating-frame))
              ;; Do not switch to exwm-mode buffers on other workspace (which
              ;; won't work unless `exwm-layout-show-all-buffers' is set)
              (unless exwm-layout-show-all-buffers
                (selected-window)))))))))

(defun exwm-config-ido ()
  "Configure Ido to work with EXWM."
  (ido-mode 1)
  (add-hook 'exwm-init-hook #'exwm-config--fix/ido-buffer-window-other-frame))

(defun exwm-config-misc ()
  "Other configurations."
  ;; Make more room
  (menu-bar-mode -1)
  (tool-bar-mode -1)
  (scroll-bar-mode -1)
  (fringe-mode 1))



(provide 'exwm-config)

;;; exwm-config.el ends here