mirror of
https://github.com/ch11ng/exwm.git
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422 lines
20 KiB
EmacsLisp
422 lines
20 KiB
EmacsLisp
;;; exwm-manage.el --- Window Management Module for -*- lexical-binding: t -*-
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;;; EXWM
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;; Copyright (C) 2015-2016 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 is the fundamental module of EXWM that deals with window management.
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;;; Code:
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(require 'exwm-core)
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(eval-when-compile (require 'exwm-workspace))
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(defvar exwm-manage-finish-hook nil
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"Normal hook run after a window is just managed, in the context of the
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corresponding buffer.")
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(defun exwm-manage--update-geometry (id &optional force)
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"Update window geometry."
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(with-current-buffer (exwm--id->buffer id)
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(unless (and exwm--geometry (not force))
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(let ((reply (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:GetGeometry :drawable id))))
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(when reply ;nil when destroyed
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(setq exwm--geometry reply))))))
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;; The _MOTIF_WM_HINTS atom (see <Xm/MwmUtil.h> for more details)
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;; It's currently only used in 'exwm-manage' module
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(defvar exwm-manage--_MOTIF_WM_HINTS nil "_MOTIF_WM_HINTS atom.")
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(defun exwm-manage--update-mwm-hints (id &optional force)
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"Update _MOTIF_WM_HINTS."
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(with-current-buffer (exwm--id->buffer id)
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(unless (and exwm--mwm-hints (not force))
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(let ((reply (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:icccm:-GetProperty
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:window id
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:property exwm-manage--_MOTIF_WM_HINTS
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:type exwm-manage--_MOTIF_WM_HINTS
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:long-length 5))))
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(when reply
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(setq exwm--mwm-hints (append (slot-value reply 'value) nil)))))))
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(defun exwm-manage--manage-window (id)
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"Manage window ID."
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(exwm--log "Try to manage #x%x" id)
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(catch 'return
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;; Ensure it's alive
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(when (xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window id :value-mask xcb:CW:EventMask
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:event-mask exwm--client-event-mask))
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(throw 'return 'dead))
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(with-current-buffer (generate-new-buffer "*EXWM*")
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(push `(,id . ,(current-buffer)) exwm--id-buffer-alist)
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(exwm-mode)
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(setq exwm--id id)
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(exwm--update-window-type id)
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(exwm--update-class id)
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(exwm--update-transient-for id)
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(exwm--update-normal-hints id)
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(exwm-manage--update-geometry id)
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(exwm-manage--update-mwm-hints id)
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;; No need to manage (please check OverrideRedirect outside)
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(when (or
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(not
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(or (not exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_NORMAL exwm-window-type)))
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;; Check _MOTIF_WM_HINTS for Java applications
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;; See <Xm/MwmUtil.h> for the definitions of these fields
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(and exwm--mwm-hints
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exwm-instance-name
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(/= 0 (logand (elt exwm--mwm-hints 0) ;MotifWmHints.flags
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2)) ;MWM_HINTS_DECORATIONS
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(= 0 (elt exwm--mwm-hints 2)) ;MotifWmHints.decorations
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;; Java applications only
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(string-prefix-p "sun-awt-X11-" exwm-instance-name)
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;; Floating windows only
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(or exwm-transient-for exwm--fixed-size
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY
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exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG
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exwm-window-type))))
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(exwm--log "No need to manage #x%x" id)
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;; Remove all events
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(xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window id :value-mask xcb:CW:EventMask
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:event-mask xcb:EventMask:NoEvent))
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;; The window needs to be mapped
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(xcb:+request exwm--connection
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(make-instance 'xcb:MapWindow :window id))
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(with-slots (x y width height) exwm--geometry
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;; Reparent to virtual root
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(unless (or (memq xcb:Atom:_NET_WM_WINDOW_TYPE_DESKTOP
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exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_DOCK
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exwm-window-type))
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(xcb:+request exwm--connection
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(make-instance 'xcb:ReparentWindow
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:window id
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:parent (frame-parameter exwm-workspace--current
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'exwm-window-id)
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:x x :y y)))
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;; Center window of type _NET_WM_WINDOW_TYPE_SPLASH
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(when (memq xcb:Atom:_NET_WM_WINDOW_TYPE_SPLASH exwm-window-type)
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(xcb:+request exwm--connection
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(make-instance 'xcb:ConfigureWindow
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:window id
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:value-mask (eval-when-compile
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(logior xcb:ConfigWindow:X
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xcb:ConfigWindow:Y))
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:x (/ (- (frame-pixel-width
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exwm-workspace--current)
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width)
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2)
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:y (/ (- (frame-pixel-height
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exwm-workspace--current)
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height)
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2)))))
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(xcb:flush exwm--connection)
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(setq exwm--id-buffer-alist (assq-delete-all id exwm--id-buffer-alist))
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(let ((kill-buffer-query-functions nil))
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(kill-buffer (current-buffer)))
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(throw 'return 'ignored))
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;; Manage the window
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(exwm--log "Manage #x%x" id)
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(xcb:+request exwm--connection ;remove border
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(make-instance 'xcb:ConfigureWindow
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:window id :value-mask xcb:ConfigWindow:BorderWidth
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:border-width 0))
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(dolist (button ;grab buttons to set focus / move / resize
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(list xcb:ButtonIndex:1 xcb:ButtonIndex:2 xcb:ButtonIndex:3))
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(xcb:+request-checked+request-check exwm--connection
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(make-instance 'xcb:GrabButton
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:owner-events 0 :grab-window id
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:event-mask xcb:EventMask:ButtonPress
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:pointer-mode xcb:GrabMode:Sync
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:keyboard-mode xcb:GrabMode:Async
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:confine-to xcb:Window:None :cursor xcb:Cursor:None
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:button button :modifiers xcb:ModMask:Any)))
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(xcb:+request exwm--connection ;update _NET_CLIENT_LIST
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(make-instance 'xcb:ewmh:set-_NET_CLIENT_LIST
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:window exwm--root
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:data (vconcat (mapcar #'car exwm--id-buffer-alist))))
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(xcb:flush exwm--connection)
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(exwm--update-title id)
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(exwm--update-hints id)
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(exwm--update-protocols id)
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(exwm--update-state id)
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(if (or exwm-transient-for exwm--fixed-size
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_UTILITY exwm-window-type)
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(memq xcb:Atom:_NET_WM_WINDOW_TYPE_DIALOG exwm-window-type))
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(exwm-floating--set-floating id)
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(exwm-floating--unset-floating id))
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(exwm-input-grab-keyboard id)
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(setq exwm-workspace--switch-history-outdated t)
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(with-current-buffer (exwm--id->buffer id)
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(run-hooks 'exwm-manage-finish-hook)))))
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(defun exwm-manage--unmanage-window (id &optional withdraw-only)
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"Unmanage window ID."
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(let ((buffer (exwm--id->buffer id)))
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(exwm--log "Unmanage #x%x (buffer: %s)" id buffer)
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(setq exwm--id-buffer-alist (assq-delete-all id exwm--id-buffer-alist))
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(xcb:+request exwm--connection ;update _NET_CLIENT_LIST
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(make-instance 'xcb:ewmh:set-_NET_CLIENT_LIST
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:window exwm--root
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:data (vconcat (mapcar #'car exwm--id-buffer-alist))))
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(xcb:flush exwm--connection)
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(when (buffer-live-p buffer)
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(with-current-buffer buffer
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(when exwm--floating-frame
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(make-frame-invisible exwm--floating-frame)
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(redisplay))
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(setq exwm-workspace--switch-history-outdated t)
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;;
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(when withdraw-only
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;; Reparent back to root
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(xcb:+request exwm--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window id :value-mask xcb:CW:EventMask
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:event-mask xcb:EventMask:NoEvent))
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(let (x y geometry geometry-parent)
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(if (not exwm--floating-frame)
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(setq x 0 y 0) ;the position does not matter
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(setq geometry-parent
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:GetGeometry
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:drawable
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(frame-parameter exwm--floating-frame
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'exwm-outer-id)))
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geometry (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:GetGeometry
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:drawable id)))
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(if (not (and geometry-parent geometry))
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(setq x 0 y 0) ;e.g. have been destroyed
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(setq x (+ (slot-value geometry-parent 'x)
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(slot-value geometry 'x))
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y (+ (slot-value geometry-parent 'y)
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(slot-value geometry 'y)))))
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(xcb:+request exwm--connection
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(make-instance 'xcb:ReparentWindow
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:window id :parent exwm--root :x x :y y)))
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;; Delete WM_STATE property
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(xcb:+request exwm--connection
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(make-instance 'xcb:DeleteProperty
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:window id :property xcb:Atom:WM_STATE))
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(xcb:flush exwm--connection))
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(let ((kill-buffer-query-functions nil)
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(floating exwm--floating-frame))
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(kill-buffer)
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(when floating
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(select-window
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(frame-selected-window exwm-workspace--current))))))))
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(defun exwm-manage--scan ()
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"Search for existing windows and try to manage them."
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(let* ((tree (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:QueryTree :window exwm--root))))
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(dolist (i (slot-value tree 'children))
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(with-slots (override-redirect map-state)
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(xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:GetWindowAttributes :window i))
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(when (and (= 0 override-redirect) (= xcb:MapState:Viewable map-state))
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(exwm-manage--manage-window i))))))
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(defvar exwm-manage--ping-lock nil
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"Non-nil indicates EXWM is pinging a window.")
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(defvar exwm-manage-ping-timeout 3 "Seconds to wait before killing a client.")
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;;;###autoload
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(defun exwm-manage--close-window (id &optional buffer)
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"Close window ID in a proper way."
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(catch 'return
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(unless (exwm--id->buffer id)
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(throw 'return t))
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(unless buffer (setq buffer (exwm--id->buffer id)))
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;; Destroy the client window if it does not support WM_DELETE_WINDOW
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(unless (and (buffer-live-p buffer)
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(with-current-buffer buffer
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(memq xcb:Atom:WM_DELETE_WINDOW exwm--protocols)))
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(xcb:+request exwm--connection
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(make-instance 'xcb:DestroyWindow :window id))
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(xcb:flush exwm--connection)
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(throw 'return nil))
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;; Try to close the window with WM_DELETE_WINDOW client message
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(xcb:+request exwm--connection
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(make-instance 'xcb:icccm:SendEvent
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:destination id
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:event (xcb:marshal
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(make-instance 'xcb:icccm:WM_DELETE_WINDOW
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:window id)
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exwm--connection)))
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(xcb:flush exwm--connection)
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;; Try to determine if the client stop responding
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(with-current-buffer buffer
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(unless (memq xcb:Atom:_NET_WM_PING exwm--protocols)
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;; Ensure it's dead
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(run-with-timer exwm-manage-ping-timeout nil
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`(lambda () (exwm-manage--kill-client ,id)))
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(throw 'return nil))
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(setq exwm-manage--ping-lock t)
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(xcb:+request exwm--connection
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(make-instance 'xcb:SendEvent
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:propagate 0 :destination id
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:event-mask xcb:EventMask:NoEvent
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:event (xcb:marshal
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(make-instance 'xcb:ewmh:_NET_WM_PING
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:window id :timestamp 0
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:client-window id)
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exwm--connection)))
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(xcb:flush exwm--connection)
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(with-timeout (exwm-manage-ping-timeout
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(if (yes-or-no-p (format "`%s' is not responding. \
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Would you like to kill it? "
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(buffer-name buffer)))
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(progn (exwm-manage--kill-client id)
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(throw 'return nil))
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(throw 'return nil)))
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(while (and exwm-manage--ping-lock
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(exwm--id->buffer id)) ;may have been destroyed
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(accept-process-output nil 0.1))))))
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(defun exwm-manage--kill-client (&optional id)
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"Kill an X client."
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(interactive)
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(unless id (setq id (exwm--buffer->id (current-buffer))))
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(let* ((response (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:ewmh:get-_NET_WM_PID :window id)))
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(pid (and response (slot-value response 'value)))
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(request (make-instance 'xcb:KillClient :resource id)))
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(if (not pid)
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(xcb:+request exwm--connection request)
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;; What if the PID is fake/wrong?
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(signal-process pid 'SIGKILL)
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;; Ensure it's dead
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(run-with-timer exwm-manage-ping-timeout nil
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`(lambda ()
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(xcb:+request exwm--connection ,request))))
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(xcb:flush exwm--connection)))
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(defun exwm-manage--on-ConfigureRequest (data _synthetic)
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"Handle ConfigureRequest event."
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(let ((obj (make-instance 'xcb:ConfigureRequest))
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buffer edges)
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(xcb:unmarshal obj data)
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(with-slots (stack-mode window sibling x y width height border-width
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value-mask)
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obj
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(exwm--log "ConfigureRequest from #x%x (#x%x) @%dx%d%+d%+d, border: %d"
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window value-mask width height x y border-width)
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(if (setq buffer (exwm--id->buffer window))
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;; Send client message for managed windows
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(with-current-buffer buffer
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(setq edges
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(if exwm--fullscreen
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(list 0 0
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(frame-pixel-width exwm-workspace--current)
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(frame-pixel-height exwm-workspace--current))
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(or exwm--floating-edges
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(window-inside-absolute-pixel-edges
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(get-buffer-window buffer t)))))
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(exwm--log "Reply with ConfigureNotify (edges): %s" edges)
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(xcb:+request exwm--connection
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(make-instance 'xcb:SendEvent
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:propagate 0 :destination window
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:event-mask xcb:EventMask:StructureNotify
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:event (xcb:marshal
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(make-instance
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'xcb:ConfigureNotify
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:event window :window window
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:above-sibling xcb:Window:None
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:x (elt edges 0) :y (elt edges 1)
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:width (- (elt edges 2) (elt edges 0))
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:height (- (elt edges 3) (elt edges 1))
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:border-width 0 :override-redirect 0)
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exwm--connection))))
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(exwm--log "ConfigureWindow (preserve geometry)")
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;; Configure unmanaged windows
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(xcb:+request exwm--connection
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(make-instance 'xcb:ConfigureWindow
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:window window
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:value-mask value-mask
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:x x :y y :width width :height height
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:border-width border-width
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:sibling sibling :stack-mode stack-mode)))))
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(xcb:flush exwm--connection))
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(defun exwm-manage--on-MapRequest (data _synthetic)
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"Handle MapRequest event."
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(let ((obj (make-instance 'xcb:MapRequest)))
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(xcb:unmarshal obj data)
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(with-slots (parent window) obj
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(if (assoc window exwm--id-buffer-alist)
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(exwm--log "#x%x is already managed" window)
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(if (/= exwm--root parent)
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(progn (xcb:+request exwm--connection
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(make-instance 'xcb:MapWindow :window window))
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(xcb:flush exwm--connection))
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(exwm--log "MapRequest from #x%x" window)
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(exwm-manage--manage-window window))))))
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(defun exwm-manage--on-UnmapNotify (data synthetic)
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"Handle UnmapNotify event."
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(unless synthetic
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(let ((obj (make-instance 'xcb:UnmapNotify)))
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(xcb:unmarshal obj data)
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(exwm--log "UnmapNotify from #x%x" (slot-value obj 'window))
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(exwm-manage--unmanage-window (slot-value obj 'window) t))))
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(defun exwm-manage--on-DestroyNotify (data synthetic)
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"Handle DestroyNotify event."
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(unless synthetic
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(let ((obj (make-instance 'xcb:DestroyNotify)))
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(xcb:unmarshal obj data)
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(exwm--log "DestroyNotify from #x%x" (slot-value obj 'window))
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(exwm-manage--unmanage-window (slot-value obj 'window)))))
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(defun exwm-manage--init ()
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"Initialize manage module."
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;; Intern _MOTIF_WM_HINTS
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(let ((atom-name "_MOTIF_WM_HINTS"))
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(setq exwm-manage--_MOTIF_WM_HINTS
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(slot-value (xcb:+request-unchecked+reply exwm--connection
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(make-instance 'xcb:InternAtom
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:only-if-exists 0
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:name-len (length atom-name)
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:name atom-name))
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'atom)))
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(xcb:+event exwm--connection 'xcb:ConfigureRequest
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#'exwm-manage--on-ConfigureRequest)
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(xcb:+event exwm--connection 'xcb:MapRequest #'exwm-manage--on-MapRequest)
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(xcb:+event exwm--connection 'xcb:UnmapNotify #'exwm-manage--on-UnmapNotify)
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(xcb:+event exwm--connection 'xcb:DestroyNotify
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#'exwm-manage--on-DestroyNotify))
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(provide 'exwm-manage)
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;;; exwm-manage.el ends here
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