232 lines
10 KiB
EmacsLisp
232 lines
10 KiB
EmacsLisp
;;; exwm-randr.el --- RandR Module for EXWM -*- lexical-binding: t -*-
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;; Copyright (C) 2015-2018 Free Software Foundation, Inc.
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;; Author: Chris Feng <chris.w.feng@gmail.com>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module adds RandR support for EXWM. Currently it requires external
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;; tools such as xrandr(1) to properly configure RandR first. This
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;; dependency may be removed in the future, but more work is needed before
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;; that.
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;; To use this module, load, enable it and configure
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;; `exwm-randr-workspace-output-plist' and `exwm-randr-screen-change-hook'
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;; as follows:
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;;
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;; (require 'exwm-randr)
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;; (setq exwm-randr-workspace-output-plist '(0 "VGA1"))
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;; (add-hook 'exwm-randr-screen-change-hook
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;; (lambda ()
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;; (start-process-shell-command
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;; "xrandr" nil "xrandr --output VGA1 --left-of LVDS1 --auto")))
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;; (exwm-randr-enable)
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;;
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;; With above lines, workspace 0 should be assigned to the output named "VGA1",
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;; staying at the left of other workspaces on the output "LVDS1". Please refer
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;; to xrandr(1) for the configuration of RandR.
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;; References:
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;; + RandR (http://www.x.org/archive/X11R7.7/doc/randrproto/randrproto.txt)
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;;; Code:
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(require 'xcb-randr)
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(require 'exwm-core)
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(defgroup exwm-randr nil
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"RandR."
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:version "25.3"
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:group 'exwm)
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(defcustom exwm-randr-refresh-hook nil
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"Normal hook run when the RandR module just refreshed."
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:type 'hook)
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(defcustom exwm-randr-screen-change-hook nil
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"Normal hook run when screen changes."
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:type 'hook)
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(defcustom exwm-randr-workspace-output-plist nil
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"Plist mapping workspace to output.
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If an output is not available, the workspaces mapped to it are displayed on
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the primary output until it becomes available. Unspecified workspaces are
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all mapped to the primary output. For example, with the following value
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workspace other than 1 and 3 would always be displayed on the primary output
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where workspace 1 and 3 would be displayed on their corresponding output
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whenever the outputs are available.
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'(1 \"HDMI-1\" 3 \"DP-1\")
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The outputs available can be identified by running the 'xrandr' utility with
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the first one in result being the primary output."
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:type '(plist :key-type integer :value-type string))
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(defvar exwm-workspace--fullscreen-frame-count)
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(defvar exwm-workspace--list)
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(declare-function exwm-workspace--count "exwm-workspace.el")
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(declare-function exwm-workspace--set-active "exwm-workspace.el"
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(frame active))
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(declare-function exwm-workspace--set-desktop-geometry "exwm-workspace.el" ())
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(declare-function exwm-workspace--set-fullscreen "exwm-workspace.el" (frame))
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(declare-function exwm-workspace--show-minibuffer "exwm-workspace.el" ())
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(declare-function exwm-workspace--update-workareas "exwm-workspace.el" ())
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(defun exwm-randr--refresh ()
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"Refresh workspaces according to the updated RandR info."
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(let (output-name geometry output-plist primary-output default-geometry
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container-output-alist container-frame-alist)
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;; Query all outputs
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(with-slots (config-timestamp outputs)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:randr:GetScreenResourcesCurrent
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:window exwm--root))
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(dolist (output outputs)
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(with-slots (crtc connection name)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:randr:GetOutputInfo
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:output output
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:config-timestamp config-timestamp))
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(setf output-name ;UTF-8 encoded
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(decode-coding-string (apply #'unibyte-string name) 'utf-8))
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(if (or (/= connection xcb:randr:Connection:Connected)
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(= 0 crtc)) ;FIXME
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(plist-put output-plist output-name nil)
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(with-slots (x y width height)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:randr:GetCrtcInfo
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:crtc crtc
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:config-timestamp config-timestamp))
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(setq geometry (make-instance 'xcb:RECTANGLE
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:x x :y y
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:width width :height height)
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output-plist (plist-put output-plist output-name geometry))
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(unless primary-output
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(setq primary-output output-name
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default-geometry geometry)))))))
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(exwm--log "(randr) outputs: %s" output-plist)
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(when output-plist
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(when exwm-workspace--fullscreen-frame-count
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;; Not all workspaces are fullscreen; reset this counter.
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(setq exwm-workspace--fullscreen-frame-count 0))
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(dotimes (i (exwm-workspace--count))
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(let* ((output (plist-get exwm-randr-workspace-output-plist i))
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(geometry (lax-plist-get output-plist output))
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(frame (elt exwm-workspace--list i))
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(container (frame-parameter frame 'exwm-container)))
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(unless geometry
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(setq geometry default-geometry
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output primary-output))
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(setq container-output-alist (nconc
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`((,container . ,(intern output)))
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container-output-alist)
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container-frame-alist (nconc `((,container . ,frame))
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container-frame-alist))
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(set-frame-parameter frame 'exwm-randr-output output)
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(set-frame-parameter frame 'exwm-geometry geometry)))
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;; Update workareas.
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(exwm-workspace--update-workareas)
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;; Resize workspace.
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(dolist (f exwm-workspace--list)
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(exwm-workspace--set-fullscreen f))
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(xcb:flush exwm--connection)
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;; Raise the minibuffer if it's active.
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(when (and (active-minibuffer-window)
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(exwm-workspace--minibuffer-own-frame-p))
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(exwm-workspace--show-minibuffer))
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;; Set _NET_DESKTOP_GEOMETRY.
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(exwm-workspace--set-desktop-geometry)
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;; Update active/inactive workspaces.
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(dolist (w exwm-workspace--list)
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(exwm-workspace--set-active w nil))
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(dolist (xwin
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(reverse
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(slot-value (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:QueryTree
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:window exwm--root))
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'children)))
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(let ((output (cdr (assq xwin container-output-alist))))
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(when output
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(setq container-output-alist
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(rassq-delete-all output container-output-alist))
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(exwm-workspace--set-active (cdr (assq xwin container-frame-alist))
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t))))
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(xcb:flush exwm--connection)
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(run-hooks 'exwm-randr-refresh-hook))))
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(defun exwm-randr--on-ScreenChangeNotify (_data _synthetic)
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(exwm--log "(RandR) ScreenChangeNotify")
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(run-hooks 'exwm-randr-screen-change-hook)
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(exwm-randr--refresh))
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(defun exwm-randr--init ()
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"Initialize RandR extension and EXWM RandR module."
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(if (= 0 (slot-value (xcb:get-extension-data exwm--connection 'xcb:randr)
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'present))
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(error "[EXWM] RandR extension is not supported by the server")
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(with-slots (major-version minor-version)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:randr:QueryVersion
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:major-version 1 :minor-version 3))
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(if (or (/= major-version 1) (< minor-version 3))
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(error "[EXWM] The server only support RandR version up to %d.%d"
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major-version minor-version)
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;; External monitor(s) may already be connected.
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(run-hooks 'exwm-randr-screen-change-hook)
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(exwm-randr--refresh)
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(xcb:+event exwm--connection 'xcb:randr:ScreenChangeNotify
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#'exwm-randr--on-ScreenChangeNotify)
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;; (xcb:+event exwm--connection 'xcb:randr:Notify
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;; (lambda (_data _synthetic)
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;; (exwm--log "(RandR) Notify")
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;; (exwm-randr--refresh)))
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(xcb:+request exwm--connection
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(make-instance 'xcb:randr:SelectInput
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:window exwm--root
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:enable xcb:randr:NotifyMask:ScreenChange
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;; :enable (eval-when-compile
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;; (logior
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;; xcb:randr:NotifyMask:ScreenChange
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;; xcb:randr:NotifyMask:OutputChange
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;; xcb:randr:NotifyMask:OutputProperty
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;; xcb:randr:NotifyMask:CrtcChange))
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))
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(xcb:flush exwm--connection)
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(add-hook 'exwm-workspace-list-change-hook #'exwm-randr--refresh))))
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;; Prevent frame parameters introduced by this module from being
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;; saved/restored.
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(dolist (i '(exwm-randr-output))
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(unless (assq i frameset-filter-alist)
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(push (cons i :never) frameset-filter-alist))))
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(defun exwm-randr--exit ()
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"Exit the RandR module."
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(remove-hook 'exwm-workspace-list-change-hook #'exwm-randr--refresh))
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(defun exwm-randr-enable ()
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"Enable RandR support for EXWM."
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(add-hook 'exwm-init-hook #'exwm-randr--init)
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(add-hook 'exwm-exit-hook #'exwm-randr--exit))
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(provide 'exwm-randr)
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;;; exwm-randr.el ends here
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