exwm/exwm-layout.el
Chris Feng c7c233bc35 Some commands should be called interactively
* exwm-layout.el (exwm-layout-set-fullscreen, exwm-layout-unset-fullscreen)
(exwm-layout-show-mode-line):
* exwm.el (exwm-reset):
Call `exwm-input-grab-keyboard' and `exwm-input-release-keyboard'
interactively.
2016-04-03 12:24:50 +08:00

545 lines
25 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; exwm-layout.el --- Layout Module for EXWM -*- lexical-binding: t -*-
;; Copyright (C) 2015-2016 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 is responsible for keeping X client window properly displayed.
;;; Code:
(require 'exwm-core)
(defvar exwm-floating-border-width)
(defun exwm-layout--resize-container (id container x y width height
&optional container-only)
"Resize a container (and its content unless CONTAINER-ONLY is non-nil)."
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window container
:value-mask (eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y
xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
:x x :y y :width width :height height))
(unless container-only
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window id
:value-mask (eval-when-compile
(logior xcb:ConfigWindow:Width
xcb:ConfigWindow:Height))
:width width :height height))))
(defun exwm-layout--show (id &optional window)
"Show window ID exactly fit in the Emacs window WINDOW."
(exwm--log "Show #x%x in %s" id window)
(let* ((edges (window-inside-absolute-pixel-edges window))
(width (- (elt edges 2) (elt edges 0)))
(height (- (elt edges 3) (elt edges 1)))
frame-width frame-height)
(with-current-buffer (exwm--id->buffer id)
(if (not exwm--floating-frame)
(let ((relative-edges (window-inside-pixel-edges window)))
(exwm-layout--resize-container id exwm--container
(elt relative-edges 0)
(elt relative-edges 1)
width height
(active-minibuffer-window)))
;; A floating X window is of the same size as the Emacs window,
;; whereas its container is of the same size as the Emacs frame.
(setq frame-width (frame-pixel-width exwm--floating-frame)
frame-height (frame-pixel-height exwm--floating-frame))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--container
:value-mask (logior xcb:ConfigWindow:Width
xcb:ConfigWindow:Height)
:width frame-width
:height frame-height))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-container)
:value-mask (logior xcb:ConfigWindow:Width
xcb:ConfigWindow:Height)
:width frame-width
:height frame-height))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--id
:value-mask (logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y
xcb:ConfigWindow:Width
xcb:ConfigWindow:Height)
:x exwm-floating-border-width
:y exwm-floating-border-width
:width width
:height height)))
;; Make the resizing take effect.
(xcb:flush exwm--connection)
(xcb:+request exwm--connection (make-instance 'xcb:MapWindow :window id))
(xcb:+request exwm--connection
(make-instance 'xcb:MapWindow :window exwm--container))
(xcb:+request exwm--connection
(make-instance 'xcb:icccm:set-WM_STATE
:window id :state xcb:icccm:WM_STATE:NormalState
:icon xcb:Window:None))
(setq exwm-state xcb:icccm:WM_STATE:NormalState))
(xcb:+request exwm--connection
(make-instance 'xcb:SendEvent
:propagate 0 :destination id
:event-mask xcb:EventMask:StructureNotify
:event (xcb:marshal
(make-instance 'xcb:ConfigureNotify
:event id :window id
:above-sibling xcb:Window:None
:x (elt edges 0)
:y (elt edges 1)
:width width :height height
:border-width 0
:override-redirect 0)
exwm--connection))))
(xcb:flush exwm--connection))
(defun exwm-layout--hide (id)
"Hide window ID."
(with-current-buffer (exwm--id->buffer id)
(unless (eq xcb:icccm:WM_STATE:IconicState exwm-state) ;already hidden
(exwm--log "Hide #x%x" id)
(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--client-event-mask))
(xcb:+request exwm--connection
(make-instance 'xcb:UnmapWindow :window exwm--container))
(xcb:+request exwm--connection
(make-instance 'xcb:icccm:set-WM_STATE
:window id
:state xcb:icccm:WM_STATE:IconicState
:icon xcb:Window:None))
(setq exwm-state xcb:icccm:WM_STATE:IconicState)
(xcb:flush exwm--connection))))
(defvar exwm-workspace--current)
(defvar exwm-workspace--list)
;;;###autoload
(defun exwm-layout-set-fullscreen (&optional id)
"Make window ID fullscreen."
(interactive)
(with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
(when exwm--fullscreen
(user-error "Already in full-screen mode."))
;; Set the floating frame fullscreen first when the client is floating
(when exwm--floating-frame
(let* ((geometry (xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry
:drawable exwm--container))))
(setq exwm--floating-frame-position
(vector (slot-value geometry 'x) (slot-value geometry 'y)))))
(exwm-layout--resize-container exwm--id exwm--container 0 0
(exwm-workspace--current-width)
(exwm-workspace--current-height))
;; Raise the X window.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--container
:value-mask xcb:ConfigWindow:StackMode
:stack-mode xcb:StackMode:Above))
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_STATE
:window exwm--id
:data (vector xcb:Atom:_NET_WM_STATE_FULLSCREEN)))
(xcb:flush exwm--connection)
(setq exwm--fullscreen t)
(call-interactively #'exwm-input-release-keyboard)))
;;;###autoload
(defun exwm-layout-unset-fullscreen (&optional id)
"Restore window from fullscreen state."
(interactive)
(with-current-buffer (if id (exwm--id->buffer id) (window-buffer))
(unless exwm--fullscreen
(user-error "Not in full-screen mode."))
(if exwm--floating-frame
;; Restore the floating frame.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--container
:value-mask (eval-when-compile
(logior xcb:ConfigWindow:X
xcb:ConfigWindow:Y))
:x (elt exwm--floating-frame-position 0)
:y (elt exwm--floating-frame-position 1)))
;; Put the X window just above the Emacs frame.
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window exwm--container
:value-mask (logior xcb:ConfigWindow:Sibling
xcb:ConfigWindow:StackMode)
:sibling (frame-parameter exwm-workspace--current
'exwm-container)
:stack-mode xcb:StackMode:Above)))
(exwm-layout--show exwm--id)
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_WM_STATE :window exwm--id :data []))
(xcb:flush exwm--connection)
(setq exwm--fullscreen nil)
(call-interactively #'exwm-input-grab-keyboard)))
(defvar exwm-layout--fullscreen-frame-count 0
"Count the fullscreen workspace frames.")
;; This function is superficially similar to `exwm-layout-set-fullscreen', but
;; they do very different things: `exwm-layout--set-frame-fullscreen' resizes a
;; frame to the actual monitor size, `exwm-layout-set-fullscreen' resizes an X
;; window to the frame size.
(defun exwm-layout--set-frame-fullscreen (frame)
"Make frame FRAME fullscreen, with regard to its RandR output if applicable."
(let ((geometry (or (frame-parameter frame 'exwm-geometry)
(xcb:+request-unchecked+reply exwm--connection
(make-instance 'xcb:GetGeometry
:drawable exwm--root))
(make-instance 'xcb:RECTANGLE :x 0 :y 0
:width (x-display-pixel-width)
:height (x-display-pixel-height))))
(id (frame-parameter frame 'exwm-outer-id))
(container (frame-parameter frame 'exwm-container))
(workspace (frame-parameter frame 'exwm-workspace)))
(with-slots (x y width height) geometry
(when (and (eq frame exwm-workspace--current)
(exwm-workspace--minibuffer-own-frame-p))
(exwm-workspace--resize-minibuffer-frame width height))
(exwm-layout--resize-container id container 0 0 width height)
(exwm-layout--resize-container nil workspace x y width height t)
(xcb:flush exwm--connection)))
(cl-incf exwm-layout--fullscreen-frame-count))
(defvar exwm-layout--other-buffer-exclude-exwm-mode-buffers nil
"When non-nil, prevent EXWM buffers from being selected by `other-buffer'.")
(defvar exwm-layout--other-buffer-exclude-buffers nil
"List of buffers that should not be selected by `other-buffer'.")
(defun exwm-layout--other-buffer-predicate (buffer)
"Return non-nil when the BUFFER may be displayed in selected frame.
Prevents EXWM-mode buffers already being displayed on some other window from
being selected.
Should be set as `buffer-predicate' frame parameter for all
frames. Used by `other-buffer'.
When variable `exwm-layout--other-buffer-exclude-exwm-mode-buffers'
is t EXWM buffers are never selected by `other-buffer'.
When variable `exwm-layout--other-buffer-exclude-buffers' is a
list of buffers, EXWM buffers belonging to that list are never
selected by `other-buffer'."
(or (not (eq 'exwm-mode (buffer-local-value 'major-mode buffer)))
(and (not exwm-layout--other-buffer-exclude-exwm-mode-buffers)
(not (memq buffer exwm-layout--other-buffer-exclude-buffers))
;; Do not select if already shown in some window.
(not (get-buffer-window buffer t)))))
(defvar exwm-layout-show-all-buffers nil
"Non-nil to allow switching to buffers on other workspaces.")
(defun exwm-layout--refresh ()
"Refresh layout."
(let ((frame (selected-frame))
covered-buffers ;EXWM-buffers covered by a new X window.
vacated-windows ;Windows previously displaying EXWM-buffers.
windows)
(if (not (memq frame exwm-workspace--list))
(if (frame-parameter frame 'exwm-outer-id)
;; Refresh a floating frame
(let ((window (frame-first-window frame)))
(with-current-buffer (window-buffer window)
(when (and (eq major-mode 'exwm-mode)
;; It may be a buffer waiting to be killed.
(exwm--id->buffer exwm--id))
(exwm--log "Refresh floating window #x%x" exwm--id)
(exwm-layout--show exwm--id window))))
;; Other frames (e.g. terminal/graphical frame of emacsclient)
;; We shall bury all `exwm-mode' buffers in this case
(setq windows (window-list frame 0)) ;exclude minibuffer
(let ((exwm-layout--other-buffer-exclude-exwm-mode-buffers t))
(dolist (window windows)
(with-current-buffer (window-buffer window)
(when (eq major-mode 'exwm-mode)
(switch-to-prev-buffer window))))))
;; Refresh the whole workspace
;; Workspaces other than the active one can also be refreshed (RandR)
(exwm--log "Refresh workspace %s" frame)
(dolist (pair exwm--id-buffer-alist)
(with-current-buffer (cdr pair)
(when (and (not exwm--floating-frame) ;exclude floating X windows
(or exwm-layout-show-all-buffers
;; Exclude X windows on other workspaces
(eq frame exwm--frame)))
(setq windows (get-buffer-window-list (current-buffer) 0))
(if (not windows)
(when (eq frame exwm--frame) ;for exwm-layout-show-all-buffers
(exwm-layout--hide exwm--id))
(let ((window (car windows)))
(if (eq frame exwm--frame)
(exwm-layout--show exwm--id window)
(exwm-workspace-move-window
(cl-position frame exwm-workspace--list) exwm--id))
;; Make sure this buffer is not displayed elsewhere. Note down
;; windows displaying an EXWM-buffer now displayed elsewhere; we
;; need to display with some other buffer there.
(setq vacated-windows
(append vacated-windows (cdr (get-buffer-window-list
(current-buffer) 0 t))))
;; Note down when an EXWM-buffer is being covered by this
;; buffer; we don't want it to reappear in some vacated window.
(let ((prev-buffer (car-safe
(car-safe (window-prev-buffers window)))))
(and
prev-buffer
(eq 'exwm-mode (buffer-local-value 'major-mode prev-buffer))
(push prev-buffer covered-buffers))))))))
;; Set some sensible buffer to vacated windows.
(let ((exwm-layout--other-buffer-exclude-buffers covered-buffers))
(dolist (window vacated-windows)
(switch-to-prev-buffer window)))
;; Make sure windows floating / on other workspaces are excluded
(let ((exwm-layout--other-buffer-exclude-exwm-mode-buffers t))
(dolist (window (window-list frame 0))
(with-current-buffer (window-buffer window)
(when (and (eq major-mode 'exwm-mode)
(or exwm--floating-frame (not (eq frame exwm--frame))))
(switch-to-prev-buffer window)))))
;; Update _NET_CLIENT_LIST_STACKING
(xcb:+request exwm--connection
(make-instance 'xcb:ewmh:set-_NET_CLIENT_LIST_STACKING
:window exwm--root
:data (vconcat
(delq nil
(mapcar
(lambda (buffer)
(with-current-buffer buffer
(when (eq major-mode 'exwm-mode)
exwm--id)))
(buffer-list))))))
(xcb:flush exwm--connection))))
(defun exwm-layout--on-minibuffer-setup ()
"Refresh layout when minibuffer grows."
(when (frame-parameter nil 'exwm-outer-id)
(run-with-idle-timer 0.01 nil ;FIXME
(lambda ()
(when (< 1 (window-height (minibuffer-window)))
(exwm-layout--refresh))))
;; Set input focus on the Emacs frame
(x-focus-frame (window-frame (minibuffer-selected-window)))))
(defun exwm-layout--on-echo-area-change (&optional dirty)
"Run when message arrives or in `echo-area-clear-hook' to refresh layout."
(when (and (current-message)
;; Exclude non-graphical frames.
(frame-parameter nil 'exwm-outer-id)
(or (cl-position ?\n (current-message))
(> (length (current-message))
(frame-width exwm-workspace--current))))
(if dirty
(exwm-layout--refresh)
(run-with-idle-timer 0.01 nil #'exwm-layout--refresh)))) ;FIXME
;;;###autoload
(defun exwm-layout-enlarge-window (delta &optional horizontal)
"Make the selected window DELTA pixels taller.
If no argument is given, make the selected window one pixel taller. If the
optional argument HORIZONTAL is non-nil, make selected window DELTA pixels
wider. If DELTA is negative, shrink selected window by -DELTA pixels.
Normal hints are checked and regarded if the selected window is displaying an
`exwm-mode' buffer. However, this may violate the normal hints set on other X
windows."
(interactive "p")
(cond
((zerop delta)) ;no operation
((window-minibuffer-p)) ;avoid resize minibuffer-window
((not (and (eq major-mode 'exwm-mode) exwm--floating-frame))
;; Resize on tiling layout
(unless (= 0 (window-resizable nil delta horizontal nil t)) ;not resizable
(let ((window-resize-pixelwise t))
(window-resize nil delta horizontal nil t))))
;; Resize on floating layout
(exwm--fixed-size) ;fixed size
(horizontal
(let* ((width (frame-pixel-width))
(edges (window-inside-pixel-edges))
(inner-width (- (elt edges 2) (elt edges 0)))
(margin (- width inner-width)))
(if (> delta 0)
(if (not exwm--normal-hints-max-width)
(cl-incf width delta)
(if (>= inner-width exwm--normal-hints-max-width)
(setq width nil)
(setq width (min (+ exwm--normal-hints-max-width margin)
(+ width delta)))))
(if (not exwm--normal-hints-min-width)
(cl-incf width delta)
(if (<= inner-width exwm--normal-hints-min-width)
(setq width nil)
(setq width (max (+ exwm--normal-hints-min-width margin)
(+ width delta))))))
(when width
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-outer-id)
:value-mask xcb:ConfigWindow:Width
:width width))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-container)
:value-mask xcb:ConfigWindow:Width
:width width))
(xcb:flush exwm--connection))))
(t
(let* ((height (frame-pixel-height))
(edges (window-inside-pixel-edges))
(inner-height (- (elt edges 3) (elt edges 1)))
(margin (- height inner-height)))
(if (> delta 0)
(if (not exwm--normal-hints-max-height)
(cl-incf height delta)
(if (>= inner-height exwm--normal-hints-max-height)
(setq height nil)
(setq height (min (+ exwm--normal-hints-max-height margin)
(+ height delta)))))
(if (not exwm--normal-hints-min-height)
(cl-incf height delta)
(if (<= inner-height exwm--normal-hints-min-height)
(setq height nil)
(setq height (max (+ exwm--normal-hints-min-height margin)
(+ height delta))))))
(when height
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-outer-id)
:value-mask xcb:ConfigWindow:Height
:height height))
(xcb:+request exwm--connection
(make-instance 'xcb:ConfigureWindow
:window (frame-parameter exwm--floating-frame
'exwm-container)
:value-mask xcb:ConfigWindow:Height
:height height))
(xcb:flush exwm--connection))))))
;;;###autoload
(defun exwm-layout-enlarge-window-horizontally (delta)
"Make the selected window DELTA pixels wider.
See also `exwm-layout-enlarge-window'."
(interactive "p")
(exwm-layout-enlarge-window delta t))
;;;###autoload
(defun exwm-layout-shrink-window (delta)
"Make the selected window DELTA pixels lower.
See also `exwm-layout-enlarge-window'."
(interactive "p")
(exwm-layout-enlarge-window (- delta)))
;;;###autoload
(defun exwm-layout-shrink-window-horizontally (delta)
"Make the selected window DELTA pixels narrower.
See also `exwm-layout-enlarge-window'."
(interactive "p")
(exwm-layout-enlarge-window (- delta) t))
;;;###autoload
(defun exwm-layout-hide-mode-line ()
"Hide mode-line."
(interactive)
(when (and (eq major-mode 'exwm-mode) mode-line-format)
(let (mode-line-height)
(when exwm--floating-frame
(setq mode-line-height (window-mode-line-height
(frame-root-window exwm--floating-frame))))
(setq exwm--mode-line-format mode-line-format
mode-line-format nil)
(if (not exwm--floating-frame)
(exwm-layout--show exwm--id)
(set-frame-height exwm--floating-frame
(- (frame-pixel-height exwm--floating-frame)
mode-line-height)
nil t)))))
;;;###autoload
(defun exwm-layout-show-mode-line ()
"Show mode-line."
(interactive)
(when (and (eq major-mode 'exwm-mode) (not mode-line-format))
(setq mode-line-format exwm--mode-line-format
exwm--mode-line-format nil)
(if (not exwm--floating-frame)
(exwm-layout--show exwm--id)
(set-frame-height exwm--floating-frame
(+ (frame-pixel-height exwm--floating-frame)
(window-mode-line-height (frame-root-window
exwm--floating-frame)))
nil t)
(call-interactively #'exwm-input-grab-keyboard))
(force-mode-line-update)))
;;;###autoload
(defun exwm-layout-toggle-mode-line ()
"Toggle the display of mode-line."
(interactive)
(when (eq major-mode 'exwm-mode)
(if mode-line-format
(exwm-layout-hide-mode-line)
(exwm-layout-show-mode-line))))
(defun exwm-layout--init ()
"Initialize layout module."
;; Auto refresh layout
(add-hook 'window-configuration-change-hook #'exwm-layout--refresh)
(unless (exwm-workspace--minibuffer-own-frame-p)
;; Refresh when minibuffer grows
(add-hook 'minibuffer-setup-hook #'exwm-layout--on-minibuffer-setup t)
(run-with-idle-timer 0 t #'exwm-layout--on-echo-area-change t)
(add-hook 'echo-area-clear-hook #'exwm-layout--on-echo-area-change)))
(provide 'exwm-layout)
;;; exwm-layout.el ends here