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