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snix/third_party/exwm/exwm-floating.el
Vincent Ambo ff96777456 subtree(3p/exwm): update to commit 'b62d5e79' 
This is almost one year of changes to EXWM. Note that it undoes our
port of https://github.com/ch11ng/exwm/pull/737

That PR hasn't seen any movement in three years, so it might not be
that relevant anymore. Other stuff has been mainlined in the meantime.

Change-Id: I0845ff8a28a5bb1553855f6d6f0ceeaedcf0809e
2023-06-06 00:40:58 +03:00

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;;; exwm-floating.el --- Floating Module for EXWM -*- lexical-binding: t -*-
;; Copyright (C) 2015-2021 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 deals with the conversion between floating and non-floating
;; states and implements moving/resizing operations on floating windows.
;;; Code:
(require 'xcb-cursor)
(require 'exwm-core)
(defgroup exwm-floating nil
"Floating."
:version "25.3"
:group 'exwm)
(defcustom exwm-floating-setup-hook nil
"Normal hook run when an X window has been made floating, in the
context of the corresponding buffer."
:type 'hook)
(defcustom exwm-floating-exit-hook nil
"Normal hook run when an X window has exited floating state, in the
context of the corresponding buffer."
:type 'hook)
(defcustom exwm-floating-border-color "navy"
"Border color of floating windows."
:type 'color
:initialize #'custom-initialize-default
:set (lambda (symbol value)
(set-default symbol value)
;; Change border color for all floating X windows.
(when exwm--connection
(let ((border-pixel (exwm--color->pixel value)))
(when border-pixel
(dolist (pair exwm--id-buffer-alist)
(with-current-buffer (cdr pair)
(when exwm--floating-frame
(xcb:+request exwm--connection
(make-instance 'xcb:ChangeWindowAttributes
:window
(frame-parameter exwm--floating-frame
'exwm-container)
:value-mask xcb:CW:BorderPixel
:border-pixel border-pixel)))))
(xcb:flush exwm--connection))))))
(defcustom exwm-floating-border-width 1
"Border width of floating windows."
:type '(integer
:validate (lambda (widget)
(when (< (widget-value widget) 0)
(widget-put widget :error "Border width is at least 0")
widget)))
:initialize #'custom-initialize-default
:set (lambda (symbol value)
(let ((delta (- value exwm-floating-border-width))
container)
(set-default symbol value)
;; Change border width for all floating X windows.
(dolist (pair exwm--id-buffer-alist)
(with-current-buffer (cdr pair)
(when exwm--floating-frame
(setq container (frame-parameter exwm--floating-frame
'exwm-container))
(with-slots (x y)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry
:drawable container))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window container
:value-mask
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y
xcb:ConfigWindow:BorderWidth)
:border-width value
:x (- x delta)
:y (- y delta)))))))
(when exwm--connection
(xcb:flush exwm--connection)))))
;; Cursors for moving/resizing a window
(defvar exwm-floating--cursor-move nil)
(defvar exwm-floating--cursor-top-left nil)
(defvar exwm-floating--cursor-top nil)
(defvar exwm-floating--cursor-top-right nil)
(defvar exwm-floating--cursor-right nil)
(defvar exwm-floating--cursor-bottom-right nil)
(defvar exwm-floating--cursor-bottom nil)
(defvar exwm-floating--cursor-bottom-left nil)
(defvar exwm-floating--cursor-left nil)
(defvar exwm-floating--moveresize-calculate nil
"Calculate move/resize parameters [buffer event-mask x y width height].")
(defvar exwm-workspace--current)
(defvar exwm-workspace--frame-y-offset)
(defvar exwm-workspace--window-y-offset)
(defvar exwm-workspace--workareas)
(declare-function exwm-layout--hide "exwm-layout.el" (id))
(declare-function exwm-layout--iconic-state-p "exwm-layout.el" (&optional id))
(declare-function exwm-layout--refresh "exwm-layout.el" ())
(declare-function exwm-layout--show "exwm-layout.el" (id &optional window))
(declare-function exwm-workspace--position "exwm-workspace.el" (frame))
(declare-function exwm-workspace--update-offsets "exwm-workspace.el" ())
(defun exwm-floating--set-allowed-actions (id tilling)
"Set _NET_WM_ALLOWED_ACTIONS."
(exwm--log "#x%x" id)
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_ALLOWED_ACTIONS
:window id
:data (if tilling
(vector xcb:Atom:_NET_WM_ACTION_MINIMIZE
xcb:Atom:_NET_WM_ACTION_FULLSCREEN
xcb:Atom:_NET_WM_ACTION_CHANGE_DESKTOP
xcb:Atom:_NET_WM_ACTION_CLOSE)
(vector xcb:Atom:_NET_WM_ACTION_MOVE
xcb:Atom:_NET_WM_ACTION_RESIZE
xcb:Atom:_NET_WM_ACTION_MINIMIZE
xcb:Atom:_NET_WM_ACTION_FULLSCREEN
xcb:Atom:_NET_WM_ACTION_CHANGE_DESKTOP
xcb:Atom:_NET_WM_ACTION_CLOSE)))))
(defun exwm-floating--set-floating (id)
"Make window ID floating."
(let ((window (get-buffer-window (exwm--id->buffer id))))
(when window
;; Hide the non-floating X window first.
(set-window-buffer window (other-buffer nil t))))
(let* ((original-frame (buffer-local-value 'exwm--frame
(exwm--id->buffer id)))
;; Create new frame
(frame (with-current-buffer
(or (get-buffer "*scratch*")
(progn
(set-buffer-major-mode
(get-buffer-create "*scratch*"))
(get-buffer "*scratch*")))
(make-frame
`((minibuffer . ,(minibuffer-window exwm--frame))
(tab-bar-lines . 0)
(tab-bar-lines-keep-state . t)
(left . ,(* window-min-width -10000))
(top . ,(* window-min-height -10000))
(width . ,window-min-width)
(height . ,window-min-height)
(unsplittable . t))))) ;and fix the size later
(outer-id (string-to-number (frame-parameter frame 'outer-window-id)))
(window-id (string-to-number (frame-parameter frame 'window-id)))
(frame-container (xcb:generate-id exwm--connection))
(window (frame-first-window frame)) ;and it's the only window
(x (slot-value exwm--geometry 'x))
(y (slot-value exwm--geometry 'y))
(width (slot-value exwm--geometry 'width))
(height (slot-value exwm--geometry 'height)))
;; Force drawing menu-bar & tool-bar.
(redisplay t)
(exwm-workspace--update-offsets)
(exwm--log "Floating geometry (original): %dx%d%+d%+d" width height x y)
;; Save frame parameters.
(set-frame-parameter frame 'exwm-outer-id outer-id)
(set-frame-parameter frame 'exwm-id window-id)
(set-frame-parameter frame 'exwm-container frame-container)
;; Fix illegal parameters
;; FIXME: check normal hints restrictions
(let* ((workarea (elt exwm-workspace--workareas
(exwm-workspace--position original-frame)))
(x* (aref workarea 0))
(y* (aref workarea 1))
(width* (aref workarea 2))
(height* (aref workarea 3)))
;; Center floating windows
(when (and (or (= x 0) (= x x*))
(or (= y 0) (= y y*)))
(let ((buffer (exwm--id->buffer exwm-transient-for))
window edges)
(when (and buffer (setq window (get-buffer-window buffer)))
(setq edges (window-inside-absolute-pixel-edges window))
(unless (and (<= width (- (elt edges 2) (elt edges 0)))
(<= height (- (elt edges 3) (elt edges 1))))
(setq edges nil)))
(if edges
;; Put at the center of leading window
(setq x (+ x* (/ (- (elt edges 2) (elt edges 0) width) 2))
y (+ y* (/ (- (elt edges 3) (elt edges 1) height) 2)))
;; Put at the center of screen
(setq x (/ (- width* width) 2)
y (/ (- height* height) 2)))))
(if (> width width*)
;; Too wide
(progn (setq x x*
width width*))
;; Invalid width
(when (= 0 width) (setq width (/ width* 2)))
;; Make sure at least half of the window is visible
(unless (< x* (+ x (/ width 2)) (+ x* width*))
(setq x (+ x* (/ (- width* width) 2)))))
(if (> height height*)
;; Too tall
(setq y y*
height height*)
;; Invalid height
(when (= 0 height) (setq height (/ height* 2)))
;; Make sure at least half of the window is visible
(unless (< y* (+ y (/ height 2)) (+ y* height*))
(setq y (+ y* (/ (- height* height) 2)))))
;; The geometry can be overridden by user options.
(let ((x** (plist-get exwm--configurations 'x))
(y** (plist-get exwm--configurations 'y))
(width** (plist-get exwm--configurations 'width))
(height** (plist-get exwm--configurations 'height)))
(if (integerp x**)
(setq x (+ x* x**))
(when (and (floatp x**)
(>= 1 x** 0))
(setq x (+ x* (round (* x** width*))))))
(if (integerp y**)
(setq y (+ y* y**))
(when (and (floatp y**)
(>= 1 y** 0))
(setq y (+ y* (round (* y** height*))))))
(if (integerp width**)
(setq width width**)
(when (and (floatp width**)
(> 1 width** 0))
(setq width (max 1 (round (* width** width*))))))
(if (integerp height**)
(setq height height**)
(when (and (floatp height**)
(> 1 height** 0))
(setq height (max 1 (round (* height** height*))))))))
(exwm--set-geometry id x y nil nil)
(xcb:flush exwm--connection)
(exwm--log "Floating geometry (corrected): %dx%d%+d%+d" width height x y)
;; Fit frame to client
;; It seems we have to make the frame invisible in order to resize it
;; timely.
;; The frame will be made visible by `select-frame-set-input-focus'.
(make-frame-invisible frame)
(let* ((edges (window-inside-pixel-edges window))
(frame-width (+ width (- (frame-pixel-width frame)
(- (elt edges 2) (elt edges 0)))))
(frame-height (+ height (- (frame-pixel-height frame)
(- (elt edges 3) (elt edges 1)))
;; Use `frame-outer-height' in the future.
exwm-workspace--frame-y-offset))
(floating-mode-line (plist-get exwm--configurations
'floating-mode-line))
(floating-header-line (plist-get exwm--configurations
'floating-header-line))
(border-pixel (exwm--color->pixel exwm-floating-border-color)))
(if floating-mode-line
(setq exwm--mode-line-format (or exwm--mode-line-format
mode-line-format)
mode-line-format floating-mode-line)
(if (and (not (plist-member exwm--configurations 'floating-mode-line))
exwm--mwm-hints-decorations)
(when exwm--mode-line-format
(setq mode-line-format exwm--mode-line-format))
;; The mode-line need to be hidden in floating mode.
(setq frame-height (- frame-height (window-mode-line-height
(frame-root-window frame)))
exwm--mode-line-format (or exwm--mode-line-format
mode-line-format)
mode-line-format nil)))
(if floating-header-line
(setq header-line-format floating-header-line)
(if (and (not (plist-member exwm--configurations
'floating-header-line))
exwm--mwm-hints-decorations)
(setq header-line-format nil)
;; The header-line need to be hidden in floating mode.
(setq frame-height (- frame-height (window-header-line-height
(frame-root-window frame)))
header-line-format nil)))
(set-frame-size frame frame-width frame-height t)
;; Create the frame container as the parent of the frame.
(xcb:+request exwm--connection
(make-instance 'xcb:CreateWindow
:depth 0
:wid frame-container
:parent exwm--root
:x x
:y (- y exwm-workspace--window-y-offset)
:width width
:height height
:border-width
(with-current-buffer (exwm--id->buffer id)
(let ((border-witdh (plist-get exwm--configurations
'border-width)))
(if (and (integerp border-witdh)
(>= border-witdh 0))
border-witdh
exwm-floating-border-width)))
:class xcb:WindowClass:InputOutput
:visual 0
:value-mask (logior xcb:CW:BackPixmap
(if border-pixel
xcb:CW:BorderPixel 0)
xcb:CW:OverrideRedirect)
:background-pixmap xcb:BackPixmap:ParentRelative
:border-pixel border-pixel
:override-redirect 1))
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_NAME
:window frame-container
:data
(format "EXWM floating frame container for 0x%x" id)))
;; Map it.
(xcb:+request exwm--connection
(make-instance 'xcb:MapWindow :window frame-container))
;; Put the X window right above this frame container.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window id
:value-mask (logior xcb:ConfigWindow:Sibling
xcb:ConfigWindow:StackMode)
:sibling frame-container
:stack-mode xcb:StackMode:Above)))
;; Reparent this frame to its container.
(xcb:+request exwm--connection
(make-instance 'xcb:ReparentWindow
:window outer-id :parent frame-container :x 0 :y 0))
(exwm-floating--set-allowed-actions id nil)
(xcb:flush exwm--connection)
;; Set window/buffer
(with-current-buffer (exwm--id->buffer id)
(setq window-size-fixed exwm--fixed-size
exwm--floating-frame frame)
;; Do the refresh manually.
(remove-hook 'window-configuration-change-hook #'exwm-layout--refresh)
(set-window-buffer window (current-buffer)) ;this changes current buffer
(add-hook 'window-configuration-change-hook #'exwm-layout--refresh)
(set-window-dedicated-p window t)
(exwm-layout--show id window))
(with-current-buffer (exwm--id->buffer id)
(if (exwm-layout--iconic-state-p id)
;; Hide iconic floating X windows.
(exwm-floating-hide)
(with-selected-frame exwm--frame
(exwm-layout--refresh)))
(select-frame-set-input-focus frame))
;; FIXME: Strangely, the Emacs frame can move itself at this point
;; when there are left/top struts set. Force resetting its
;; position seems working, but it'd better to figure out why.
;; FIXME: This also happens in another case (#220) where the cause is
;; still unclear.
(exwm--set-geometry outer-id 0 0 nil nil)
(xcb:flush exwm--connection))
(with-current-buffer (exwm--id->buffer id)
(run-hooks 'exwm-floating-setup-hook))
;; Redraw the frame.
(redisplay t))
(defun exwm-floating--unset-floating (id)
"Make window ID non-floating."
(exwm--log "#x%x" id)
(let ((buffer (exwm--id->buffer id)))
(with-current-buffer buffer
(when exwm--floating-frame
;; The X window is already mapped.
;; Unmap the X window.
(xcb:+request exwm--connection
(make-instance 'xcb:ChangeWindowAttributes
:window id :value-mask xcb:CW:EventMask
:event-mask xcb:EventMask:NoEvent))
(xcb:+request exwm--connection
(make-instance 'xcb:UnmapWindow :window id))
(xcb:+request exwm--connection
(make-instance 'xcb:ChangeWindowAttributes
:window id :value-mask xcb:CW:EventMask
:event-mask (exwm--get-client-event-mask)))
;; Reparent the floating frame back to the root window.
(let ((frame-id (frame-parameter exwm--floating-frame 'exwm-outer-id))
(frame-container (frame-parameter exwm--floating-frame
'exwm-container)))
(xcb:+request exwm--connection
(make-instance 'xcb:UnmapWindow :window frame-id))
(xcb:+request exwm--connection
(make-instance 'xcb:ReparentWindow
:window frame-id
:parent exwm--root
:x 0 :y 0))
;; Also destroy its container.
(xcb:+request exwm--connection
(make-instance 'xcb:DestroyWindow :window frame-container))))
;; Place the X window just above the reference X window.
;; (the stacking order won't change from now on).
;; Also hide the possible floating border.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window id
:value-mask (logior xcb:ConfigWindow:BorderWidth
xcb:ConfigWindow:Sibling
xcb:ConfigWindow:StackMode)
:border-width 0
:sibling exwm--guide-window
:stack-mode xcb:StackMode:Above)))
(exwm-floating--set-allowed-actions id t)
(xcb:flush exwm--connection)
(with-current-buffer buffer
(when exwm--floating-frame ;from floating to non-floating
(set-window-dedicated-p (frame-first-window exwm--floating-frame) nil)
;; Select a tiling window and delete the old frame.
(select-window (frame-selected-window exwm-workspace--current))
(with-current-buffer buffer
(delete-frame exwm--floating-frame))))
(with-current-buffer buffer
(setq window-size-fixed nil
exwm--floating-frame nil)
(if (not (plist-member exwm--configurations 'tiling-mode-line))
(when exwm--mode-line-format
(setq mode-line-format exwm--mode-line-format))
(setq exwm--mode-line-format (or exwm--mode-line-format
mode-line-format)
mode-line-format (plist-get exwm--configurations
'tiling-mode-line)))
(if (not (plist-member exwm--configurations 'tiling-header-line))
(setq header-line-format nil)
(setq header-line-format (plist-get exwm--configurations
'tiling-header-line))))
;; Only show X windows in normal state.
(unless (exwm-layout--iconic-state-p)
(pop-to-buffer-same-window buffer)))
(with-current-buffer (exwm--id->buffer id)
(run-hooks 'exwm-floating-exit-hook)))
;;;###autoload
(cl-defun exwm-floating-toggle-floating ()
"Toggle the current window between floating and non-floating states."
(interactive)
(exwm--log)
(unless (derived-mode-p 'exwm-mode)
(cl-return-from exwm-floating-toggle-floating))
(with-current-buffer (window-buffer)
(if exwm--floating-frame
(exwm-floating--unset-floating exwm--id)
(exwm-floating--set-floating exwm--id))))
;;;###autoload
(defun exwm-floating-hide ()
"Hide the current floating X window (which would show again when selected)."
(interactive)
(exwm--log)
(when (and (derived-mode-p 'exwm-mode)
exwm--floating-frame)
(exwm-layout--hide exwm--id)
(select-frame-set-input-focus exwm-workspace--current)))
(defun exwm-floating--start-moveresize (id &optional type)
"Start move/resize."
(exwm--log "#x%x" id)
(let ((buffer-or-id (or (exwm--id->buffer id) id))
frame container-or-id x y width height cursor)
(if (bufferp buffer-or-id)
;; Managed.
(with-current-buffer buffer-or-id
(setq frame exwm--floating-frame
container-or-id (frame-parameter exwm--floating-frame
'exwm-container)))
;; Unmanaged.
(setq container-or-id id))
(when (and container-or-id
;; Test if the pointer can be grabbed
(= xcb:GrabStatus:Success
(slot-value
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GrabPointer
:owner-events 0
:grab-window container-or-id
:event-mask xcb:EventMask:NoEvent
:pointer-mode xcb:GrabMode:Async
:keyboard-mode xcb:GrabMode:Async
:confine-to xcb:Window:None
:cursor xcb:Cursor:None
:time xcb:Time:CurrentTime))
'status)))
(with-slots (root-x root-y win-x win-y)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:QueryPointer :window id))
(if (not (bufferp buffer-or-id))
;; Unmanaged.
(unless (eq type xcb:ewmh:_NET_WM_MOVERESIZE_MOVE)
(with-slots ((width* width)
(height* height))
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry :drawable id))
(setq width width*
height height*)))
;; Managed.
(select-window (frame-first-window frame)) ;transfer input focus
(setq width (frame-pixel-width frame)
height (frame-pixel-height frame))
(unless type
;; Determine the resize type according to the pointer position
;; Clicking the center 1/3 part to resize has no effect
(setq x (/ (* 3 win-x) (float width))
y (/ (* 3 win-y) (float height))
type (cond ((and (< x 1) (< y 1))
xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPLEFT)
((and (> x 2) (< y 1))
xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPRIGHT)
((and (> x 2) (> y 2))
xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT)
((and (< x 1) (> y 2))
xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT)
((> x 2) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_RIGHT)
((> y 2) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOM)
((< x 1) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_LEFT)
((< y 1) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP)))))
(if (not type)
(exwm-floating--stop-moveresize)
(cond ((= type xcb:ewmh:_NET_WM_MOVERESIZE_MOVE)
(setq cursor exwm-floating--cursor-move
exwm-floating--moveresize-calculate
(lambda (x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y))
(- x win-x) (- y win-y) 0 0))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPLEFT)
(setq cursor exwm-floating--cursor-top-left
exwm-floating--moveresize-calculate
(lambda (x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y
xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
(- x win-x) (- y win-y)
(- (+ root-x width) x)
(- (+ root-y height) y)))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP)
(setq cursor exwm-floating--cursor-top
exwm-floating--moveresize-calculate
(lambda (_x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:Y
xcb:ConfigWindow:Height))
0 (- y win-y) 0 (- (+ root-y height) y)))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOPRIGHT)
(setq cursor exwm-floating--cursor-top-right
exwm-floating--moveresize-calculate
(lambda (x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:Y
xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
0 (- y win-y) (- x (- root-x width))
(- (+ root-y height) y)))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_RIGHT)
(setq cursor exwm-floating--cursor-right
exwm-floating--moveresize-calculate
(lambda (x _y)
(vector buffer-or-id
xcb:ConfigWindow:Width
0 0 (- x (- root-x width)) 0))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT)
(setq cursor exwm-floating--cursor-bottom-right
exwm-floating--moveresize-calculate
(lambda (x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
0 0 (- x (- root-x width))
(- y (- root-y height))))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOM)
(setq cursor exwm-floating--cursor-bottom
exwm-floating--moveresize-calculate
(lambda (_x y)
(vector buffer-or-id
xcb:ConfigWindow:Height
0 0 0 (- y (- root-y height))))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT)
(setq cursor exwm-floating--cursor-bottom-left
exwm-floating--moveresize-calculate
(lambda (x y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
(- x win-x)
0
(- (+ root-x width) x)
(- y (- root-y height))))))
((= type xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_LEFT)
(setq cursor exwm-floating--cursor-left
exwm-floating--moveresize-calculate
(lambda (x _y)
(vector buffer-or-id
(eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Width))
(- x win-x) 0 (- (+ root-x width) x) 0)))))
;; Select events and change cursor (should always succeed)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GrabPointer
:owner-events 0 :grab-window container-or-id
:event-mask (eval-when-compile
(logior xcb:EventMask:ButtonRelease
xcb:EventMask:ButtonMotion))
:pointer-mode xcb:GrabMode:Async
:keyboard-mode xcb:GrabMode:Async
:confine-to xcb:Window:None
:cursor cursor
:time xcb:Time:CurrentTime)))))))
(defun exwm-floating--stop-moveresize (&rest _args)
"Stop move/resize."
(exwm--log)
(xcb:+request exwm--connection
(make-instance 'xcb:UngrabPointer :time xcb:Time:CurrentTime))
(when exwm-floating--moveresize-calculate
(let (result buffer-or-id outer-id container-id)
(setq result (funcall exwm-floating--moveresize-calculate 0 0)
buffer-or-id (aref result 0))
(when (bufferp buffer-or-id)
(with-current-buffer buffer-or-id
(setq outer-id (frame-parameter exwm--floating-frame 'exwm-outer-id)
container-id (frame-parameter exwm--floating-frame
'exwm-container))
(with-slots (x y width height border-width)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry
:drawable container-id))
;; Notify Emacs frame about this the position change.
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0
:destination outer-id
:event-mask xcb:EventMask:StructureNotify
:event
(xcb:marshal
(make-instance 'xcb:ConfigureNotify
:event outer-id
:window outer-id
:above-sibling xcb:Window:None
:x (+ x border-width)
:y (+ y border-width)
:width width
:height height
:border-width 0
:override-redirect 0)
exwm--connection)))
(xcb:flush exwm--connection))
(exwm-layout--show exwm--id
(frame-root-window exwm--floating-frame)))))
(setq exwm-floating--moveresize-calculate nil)))
(defun exwm-floating--do-moveresize (data _synthetic)
"Perform move/resize."
(when exwm-floating--moveresize-calculate
(let* ((obj (make-instance 'xcb:MotionNotify))
result value-mask x y width height buffer-or-id container-or-id)
(xcb:unmarshal obj data)
(setq result (funcall exwm-floating--moveresize-calculate
(slot-value obj 'root-x) (slot-value obj 'root-y))
buffer-or-id (aref result 0)
value-mask (aref result 1)
x (aref result 2)
y (aref result 3)
width (max 1 (aref result 4))
height (max 1 (aref result 5)))
(if (not (bufferp buffer-or-id))
;; Unmanaged.
(setq container-or-id buffer-or-id)
;; Managed.
(setq container-or-id
(with-current-buffer buffer-or-id
(frame-parameter exwm--floating-frame 'exwm-container))
x (- x exwm-floating-border-width)
;; Use `frame-outer-height' in the future.
y (- y exwm-floating-border-width
exwm-workspace--window-y-offset)
height (+ height exwm-workspace--window-y-offset)))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window container-or-id
:value-mask (aref result 1)
:x x
:y y
:width width
:height height))
(when (bufferp buffer-or-id)
;; Managed.
(setq value-mask (logand value-mask (logior xcb:ConfigWindow:Width
xcb:ConfigWindow:Height)))
(when (/= 0 value-mask)
(with-current-buffer buffer-or-id
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-outer-id)
:value-mask value-mask
:width width
:height height)))))
(xcb:flush exwm--connection))))
(defun exwm-floating-move (&optional delta-x delta-y)
"Move a floating window right by DELTA-X pixels and down by DELTA-Y pixels.
Both DELTA-X and DELTA-Y default to 1. This command should be bound locally."
(exwm--log "delta-x: %s, delta-y: %s" delta-x delta-y)
(unless (and (derived-mode-p 'exwm-mode) exwm--floating-frame)
(user-error "[EXWM] `exwm-floating-move' is only for floating X windows"))
(unless delta-x (setq delta-x 1))
(unless delta-y (setq delta-y 1))
(unless (and (= 0 delta-x) (= 0 delta-y))
(let* ((floating-container (frame-parameter exwm--floating-frame
'exwm-container))
(geometry (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry
:drawable floating-container)))
(edges (window-inside-absolute-pixel-edges)))
(with-slots (x y) geometry
(exwm--set-geometry floating-container
(+ x delta-x) (+ y delta-y) nil nil))
(exwm--set-geometry exwm--id
(+ (pop edges) delta-x)
(+ (pop edges) delta-y)
nil nil))
(xcb:flush exwm--connection)))
(defun exwm-floating--init ()
"Initialize floating module."
(exwm--log)
;; Initialize cursors for moving/resizing a window
(xcb:cursor:init exwm--connection)
(setq exwm-floating--cursor-move
(xcb:cursor:load-cursor exwm--connection "fleur")
exwm-floating--cursor-top-left
(xcb:cursor:load-cursor exwm--connection "top_left_corner")
exwm-floating--cursor-top
(xcb:cursor:load-cursor exwm--connection "top_side")
exwm-floating--cursor-top-right
(xcb:cursor:load-cursor exwm--connection "top_right_corner")
exwm-floating--cursor-right
(xcb:cursor:load-cursor exwm--connection "right_side")
exwm-floating--cursor-bottom-right
(xcb:cursor:load-cursor exwm--connection "bottom_right_corner")
exwm-floating--cursor-bottom
(xcb:cursor:load-cursor exwm--connection "bottom_side")
exwm-floating--cursor-bottom-left
(xcb:cursor:load-cursor exwm--connection "bottom_left_corner")
exwm-floating--cursor-left
(xcb:cursor:load-cursor exwm--connection "left_side")))
(defun exwm-floating--exit ()
"Exit the floating module."
(exwm--log))
(provide 'exwm-floating)
;;; exwm-floating.el ends here
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