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Diffstat (limited to 'exwm-randr.el')
| -rw-r--r-- | exwm-randr.el | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/exwm-randr.el b/exwm-randr.el new file mode 100644 index 000000000000..c9ad1ce6ae7b --- /dev/null +++ b/exwm-randr.el @@ -0,0 +1,131 @@ +;;; exwm-randr.el --- RandR Module for EXWM -*- lexical-binding: t -*- + +;; Copyright (C) 2015 Chris Feng + +;; Author: Chris Feng <chris.w.feng@gmail.com> +;; Keywords: unix + +;; This file is not part of GNU Emacs. + +;; This file 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. + +;; This file 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 this file. If not, see <http://www.gnu.org/licenses/>. + +;;; Commentary: + +;; This module adds RandR support for EXWM. Currently it requires external +;; tools such as xrandr(1) to properly configure RandR first. This dependency +;; may be removed in the future, but more work is needed before that. + +;; To use this module, first set `exwm-randr-workspace-output-plist': +;; (setq exwm-randr-workspace-output-plist '(0 "VGA1")) +;; Then configure RandR with 'xrandr': +;; $ xrandr --output VGA1 --left-of LVDS1 --auto +;; With above lines, workspace 0 should be assigned to the output named "VGA1", +;; staying at the left of other workspaces on the output "LVDS1". + +;; Todo: +;; + Update EWMH hints. + +;; References: +;; + RandR (http://www.x.org/archive/X11R7.7/doc/randrproto/randrproto.txt) + +;;; Code: + +(require 'xcb-randr) + +(defvar exwm-randr-workspace-output-plist nil) + +(defun exwm-randr--refresh () + "Refresh workspaces according to the updated RandR info." + (let (output-plist default-geometry) + ;; Query all outputs + (with-slots (config-timestamp outputs) + (xcb:+request-unchecked+reply exwm--connection + (make-instance 'xcb:randr:GetScreenResources + :window exwm--root)) + (dolist (output outputs) + (with-slots (crtc connection name) + (xcb:+request-unchecked+reply exwm--connection + (make-instance 'xcb:randr:GetOutputInfo + :output output + :config-timestamp config-timestamp)) + (setq name ;UTF-8 encoded + (decode-coding-string (apply 'unibyte-string name) 'utf-8)) + (if (or (/= connection xcb:randr:Connection:Connected) + (= 0 crtc)) ;FIXME + (plist-put output-plist name nil) + (with-slots (x y width height) + (xcb:+request-unchecked+reply exwm--connection + (make-instance 'xcb:randr:GetCrtcInfo + :crtc crtc + :config-timestamp config-timestamp)) + (setq output-plist (plist-put output-plist name + (vector x y width height))) + (unless default-geometry ;assume the first output as primary + (setq default-geometry (vector x y width height)))))))) + (cl-assert (<= 2 (length output-plist))) + (dotimes (i exwm-workspace-number) + (let* ((output (plist-get exwm-randr-workspace-output-plist i)) + (geometry (lax-plist-get output-plist output)) + (frame (elt exwm-workspace--list i))) + (unless geometry + (setq geometry default-geometry + output nil)) + (set-frame-parameter frame 'exwm-randr-output output) + (xcb:+request exwm--connection + (make-instance 'xcb:ConfigureWindow + :window (frame-parameter frame 'exwm-outer-id) + :value-mask (logior xcb:ConfigWindow:X + xcb:ConfigWindow:Y + xcb:ConfigWindow:Width + xcb:ConfigWindow:Height) + :x (elt geometry 0) :y (elt geometry 1) + :width (elt geometry 2) :height (elt geometry 3))))) + (xcb:flush exwm--connection))) + +(defun exwm-randr--init () + "Initialize RandR extension and EXWM RandR module." + (if (= 0 (slot-value (xcb:get-extension-data exwm--connection 'xcb:randr) + 'present)) + (error "[EXWM] RandR extension is not supported by the server") + (with-slots (major-version minor-version) + (xcb:+request-unchecked+reply exwm--connection + (make-instance 'xcb:randr:QueryVersion + :major-version 1 :minor-version 2)) + (if (or (/= major-version 1) (< minor-version 2)) + (error "[EXWM] The server only support RandR version up to %d.%d" + major-version minor-version) + (exwm-randr--refresh) + (xcb:+event exwm--connection 'xcb:randr:ScreenChangeNotify + (lambda (data synthetic) + (exwm-randr--refresh))) + ;; (xcb:+event exwm--connection 'xcb:randr:Notify + ;; (lambda (data synthetic) + ;; (exwm-randr--refresh))) + (xcb:+request exwm--connection + (make-instance 'xcb:randr:SelectInput + :window exwm--root + :enable xcb:randr:NotifyMask:ScreenChange + ;; :enable (logior + ;; xcb:randr:NotifyMask:ScreenChange + ;; xcb:randr:NotifyMask:OutputChange + ;; xcb:randr:NotifyMask:OutputProperty + ;; xcb:randr:NotifyMask:CrtcChange) + )) + (xcb:flush exwm--connection))))) + + + +(provide 'exwm-randr) + +;;; exwm-randr.el ends here |