;;; exwm-floating.el --- Floating 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 deals with the conversion between floating and non-floating ;; states and implements moving/resizing operations on floating windows. ;; Todo: ;; + move/resize with keyboard. ;;; Code: (require 'xcb-cursor) (defvar exwm-floating-border-width 1 "Border width of the floating window.") (defvar exwm-floating-border-color "blue" "Border color of the floating window.") (defvar exwm-floating-setup-hook nil "Normal hook run when a window has been made floating.") (defvar exwm-floating-exit-hook nil "Normal hook run when a window has exited floating state.") (defun exwm-floating--set-floating (id) "Make window ID floating." (interactive) (let ((window (get-buffer-window (exwm--id->buffer id)))) (when window ;window in non-floating state (set-window-buffer window (other-buffer)))) ;hide it first (let* ((original-frame (with-current-buffer (exwm--id->buffer id) (if (and exwm-transient-for (exwm--id->buffer exwm-transient-for)) ;; Place a modal in the same workspace with its leading window (with-current-buffer (exwm--id->buffer exwm-transient-for) exwm--frame) ;; Fallback to current workspace exwm-workspace--current))) (original-id (frame-parameter original-frame 'exwm-window-id)) ;; Create new frame (frame (with-current-buffer "*scratch*" (prog2 (exwm--lock) (make-frame `((minibuffer . nil) ;use the one on workspace (background-color . ,exwm-floating-border-color) (internal-border-width . ,exwm-floating-border-width) (unsplittable . t))) ;and fix the size later (exwm--unlock)))) (frame-id (string-to-int (frame-parameter frame 'window-id))) (outer-id (string-to-int (frame-parameter frame 'outer-window-id))) (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))) (exwm--log "Floating geometry (original): %dx%d%+d%+d" width height x y) ;; Save window IDs (set-frame-parameter frame 'exwm-window-id frame-id) (set-frame-parameter frame 'exwm-outer-id outer-id) ;; Set urgency flag if it's not appear in the active workspace (let ((idx (cl-position original-frame exwm-workspace--list))) (when (/= idx exwm-workspace-current-index) (set-frame-parameter original-frame 'exwm--urgency t) (exwm-workspace--update-switch-history))) ;; Fix illegal parameters ;; FIXME: check normal hints restrictions (let* ((display-width (frame-pixel-width original-frame)) (display-height (- (frame-pixel-height original-frame) (window-pixel-height (minibuffer-window original-frame)) (* 2 (window-mode-line-height)) (window-header-line-height window) (* 2 exwm-floating-border-width))) (display-height (* 2 (/ display-height 2)))) ;round to even (if (> width display-width) ;; Too wide (progn (setq x 0 width display-width)) ;; Invalid width (when (= 0 width) (setq width (/ display-width 2))) ;; Make sure at least half of the window is visible (when (or (> (+ x (/ width 2)) display-width) (> 0 (+ x (/ width 2)))) (setq x (/ (- display-width width) 2)))) (if (> height display-height) ;; Too tall (setq y 0 height display-height) ;; Invalid height (when (= 0 height) (setq height (/ display-height 2))) ;; Make sure at least half of the window is visible (when (or (> (+ y (/ height 2)) display-height) (> 0 (+ y (/ height 2)))) (setq y (/ (- display-height height) 2)))) ;; Center floating windows (when (and (= x 0) (= y 0)) (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 (/ (- (+ (elt edges 2) (elt edges 0)) width) 2) y (/ (- (+ (elt edges 3) (elt edges 1)) height) 2)) ;; Put at the center of screen (setq x (/ (- display-width width) 2) y (/ (- display-height height) 2)))))) (exwm--log "Floating geometry (corrected): %dx%d%+d%+d" width height x y) ;; Set OverrideRedirect on this frame (xcb:+request exwm--connection (make-instance 'xcb:ChangeWindowAttributes :window outer-id :value-mask xcb:CW:OverrideRedirect :override-redirect 1)) ;; Set event mask (xcb:+request exwm--connection (make-instance 'xcb:ChangeWindowAttributes :window frame-id :value-mask xcb:CW:EventMask :event-mask xcb:EventMask:SubstructureRedirect)) ;; Reparent this frame to the original one (xcb:+request exwm--connection (make-instance 'xcb:ReparentWindow :window outer-id :parent original-id :x (- x exwm-floating-border-width) :y (- y exwm-floating-border-width))) ;; Save the geometry ;; Rationale: the frame will not be ready for some time, thus we cannot ;; infer the correct window size from its geometry. (with-current-buffer (exwm--id->buffer id) (setq exwm--floating-edges (vector exwm-floating-border-width exwm-floating-border-width (+ width exwm-floating-border-width) (+ height exwm-floating-border-width)))) ;; Fit frame to client (xcb:+request exwm--connection (make-instance 'xcb:ConfigureWindow :window outer-id :value-mask (logior xcb:ConfigWindow:Width xcb:ConfigWindow:Height xcb:ConfigWindow:StackMode) :width (+ width (* 2 exwm-floating-border-width)) :height (+ height (* 2 exwm-floating-border-width) (window-mode-line-height) (window-header-line-height)) :stack-mode xcb:StackMode:Above)) ;top-most ;; Reparent window to this frame (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:ReparentWindow :window id :parent frame-id :x exwm-floating-border-width :y exwm-floating-border-width)) (xcb:+request exwm--connection (make-instance 'xcb:ChangeWindowAttributes :window id :value-mask xcb:CW:EventMask :event-mask exwm--client-event-mask)) (xcb:flush exwm--connection) ;; Set window/buffer (with-current-buffer (exwm--id->buffer id) (setq window-size-fixed t ;make frame fixed size exwm--frame original-frame exwm--floating-frame frame) (set-window-buffer window (current-buffer)) ;this changes current buffer (set-window-dedicated-p window t)) (select-window window)) (run-hooks 'exwm-floating-setup-hook)) (defun exwm-floating--unset-floating (id) "Make window ID non-floating." (interactive) (let ((buffer (exwm--id->buffer id))) ;; Reparent to workspace frame (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:ReparentWindow :window id :parent (frame-parameter exwm-workspace--current 'exwm-window-id) :x 0 :y 0)) ;temporary position (xcb:+request exwm--connection (make-instance 'xcb:ChangeWindowAttributes :window id :value-mask xcb:CW:EventMask :event-mask exwm--client-event-mask)) (xcb:flush exwm--connection) (with-current-buffer buffer (when exwm--floating-frame ;from floating to non-floating (setq exwm--floating-edges nil) ;invalid by now (set-window-dedicated-p (frame-first-window exwm--floating-frame) nil) (delete-frame exwm--floating-frame))) ;remove the floating frame (with-current-buffer buffer (setq window-size-fixed nil exwm--floating-frame nil exwm--frame exwm-workspace--current)) (let ((window (frame-selected-window exwm-workspace--current))) (set-window-buffer window buffer) (select-window window))) (run-hooks 'exwm-floating-exit-hook)) (defun exwm-floating-toggle-floating () "Toggle the current window between floating and non-floating states." (interactive) (with-current-buffer (window-buffer) (if exwm--floating-frame (exwm-floating--unset-floating exwm--id) (exwm-floating--set-floating exwm--id)))) (defvar exwm-floating--moveresize-calculate nil "Calculate move/resize parameters [frame-id event-mask x y width height].") (defun exwm-floating--start-moveresize (id &optional type) "Start move/resize." (let ((buffer (exwm--id->buffer id)) frame frame-id cursor) (when (and buffer (setq frame (with-current-buffer buffer exwm--floating-frame)) (setq frame-id (frame-parameter frame 'exwm-outer-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 frame-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))) (setq exwm--floating-edges nil) ;invalid by now (with-slots (root-x root-y win-x win-y) (xcb:+request-unchecked+reply exwm--connection (make-instance 'xcb:QueryPointer :window id)) (select-frame-set-input-focus frame) ;raise and focus it (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 not 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) ((< y 1) xcb:ewmh:_NET_WM_MOVERESIZE_SIZE_TOP) ((> 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)))) (when type (cond ((= type xcb:ewmh:_NET_WM_MOVERESIZE_MOVE) (setq cursor exwm-floating--cursor-move exwm-floating--moveresize-calculate `(lambda (x y) (vector ,frame-id ,(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 ,frame-id ,(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 ,frame-id ,(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 ,frame-id ,(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 ,frame-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 ,frame-id ,(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 ,frame-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 ,frame-id ,(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 ,frame-id ,(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 frame-id :event-mask (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." (xcb:+request exwm--connection (make-instance 'xcb:UngrabPointer :time xcb:Time:CurrentTime)) (xcb:flush exwm--connection) (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)) (geometry (frame-parameter exwm-workspace--current 'exwm-geometry)) (frame-x 0) (frame-y 0) result) (when geometry (setq frame-x (slot-value geometry 'x) frame-y (slot-value geometry 'y))) (xcb:unmarshal obj data) (setq result (funcall exwm-floating--moveresize-calculate (slot-value obj 'root-x) (slot-value obj 'root-y))) (xcb:+request exwm--connection (make-instance 'xcb:ConfigureWindow :window (elt result 0) :value-mask (elt result 1) :x (- (elt result 2) frame-x) :y (- (elt result 3) frame-y) :width (elt result 4) :height (elt result 5))) (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) (defun exwm-floating--init () "Initialize floating module." ;; 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"))) (provide 'exwm-floating) ;;; exwm-floating.el ends here