/usr/share/common-lisp/source/stumpwm/head.lisp is in stumpwm 2:0.9.9-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | ;; Copyright (C) 2003-2008 Shawn Betts
;;
;; This file is part of stumpwm.
;;
;; stumpwm 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 2, or (at your option)
;; any later version.
;; stumpwm 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 software; see the file COPYING. If not, see
;; <http://www.gnu.org/licenses/>.
;; Commentary:
;;
;; Head functionality
;;
;; Code:
(in-package #:stumpwm)
(export '(current-head))
(defun head-by-number (screen n)
(find n (screen-heads screen) :key 'head-number))
(defun parse-xinerama-head (line)
(ppcre:register-groups-bind (('parse-integer number width height x y))
("^ +head #([0-9]+): ([0-9]+)x([0-9]+) @ ([0-9]+),([0-9]+)" line :sharedp t)
(handler-case
(make-head :number number
:x x :y y
:width width
:height height)
(parse-error ()
nil))))
(defun make-screen-heads (screen root)
"or use xdpyinfo to query the xinerama extension, if it's enabled."
(or (and (xlib:query-extension *display* "XINERAMA")
(with-current-screen screen
;; Ignore 'clone' heads.
(loop
for i = 0 then (1+ i)
for h in
(delete-duplicates
(loop for i in (split-string (run-shell-command "xdpyinfo -ext XINERAMA" t))
for head = (parse-xinerama-head i)
when head
collect head)
:test #'frames-overlap-p)
do (setf (head-number h) i)
collect h)))
(list (make-head :number 0
:x 0 :y 0
:width (xlib:drawable-width root)
:height (xlib:drawable-height root)
:window nil))))
(defun copy-heads (screen)
"Return a copy of screen's heads."
(mapcar 'copy-frame (screen-heads screen)))
;; Determining a frame's head based on position probably won't
;; work with overlapping heads. Would it be better to walk
;; up the frame tree?
(defun frame-head (group frame)
(let ((center-x (+ (frame-x frame) (ash (frame-width frame) -1)))
(center-y (+ (frame-y frame) (ash (frame-height frame) -1))))
(dolist (head (screen-heads (group-screen group)))
(when (and
(>= center-x (frame-x head))
(>= center-y (frame-y head))
(<= center-x
(+ (frame-x head) (frame-width head)))
(<= center-y
(+ (frame-y head) (frame-height head))))
(return head)))))
(defun group-heads (group)
(screen-heads (group-screen group)))
(defun resize-head (number x y width height)
"Resize head number `number' to given dimension."
(let* ((screen (current-screen))
(oh (find number (screen-heads screen) :key 'head-number))
(nh (make-head :number number
:x x :y y
:width width
:height height
:window nil)))
(scale-head screen oh nh)
(dolist (group (screen-groups screen)) (group-sync-head group oh))
(update-mode-lines screen)))
(defun current-head (&optional (group (current-group)))
(group-current-head group))
(defun head-windows (group head)
"Returns a list of windows on HEAD of GROUP"
(remove-if-not
(lambda (w)
(eq head (window-head w)))
(group-windows group)))
(defun frame-is-head (group frame)
(< (frame-number frame) (length (group-heads group))))
(defun add-head (screen head)
(dformat 1 "Adding head #~D~%" (head-number head))
(setf (screen-heads screen) (sort (push head (screen-heads screen)) #'<
:key 'head-number))
(dolist (group (screen-groups screen))
(group-add-head group head)))
(defun remove-head (screen head)
(dformat 1 "Removing head #~D~%" (head-number head))
(when (head-mode-line head)
(toggle-mode-line screen head))
(dolist (group (screen-groups screen))
(group-remove-head group head))
;; Remove it from SCREEN's head list.
(setf (screen-heads screen) (delete head (screen-heads screen))))
(defun scale-head (screen oh nh)
"Scales head OH to match the dimensions of NH."
(dolist (group (screen-groups screen))
(group-resize-head group oh nh))
(setf (head-x oh) (head-x nh)
(head-y oh) (head-y nh)
(head-width oh) (head-width nh)
(head-height oh) (head-height nh)))
(defun scale-screen (screen heads)
"Scale all frames of all groups of SCREEN to match the dimensions of HEADS."
(let ((oheads (screen-heads screen)))
(when (< (length heads) (length oheads))
;; Some heads were removed (or cloned), try to guess which.
(dolist (oh oheads)
(dolist (nh heads)
(when (= (head-number oh) (head-number nh))
;; Same frame number, probably the same head
(setf (head-number nh) (head-number oh))))))
(dolist (h (set-difference oheads heads :test '= :key 'head-number))
(remove-head screen h))
(dolist (h (set-difference heads oheads :test '= :key 'head-number))
(add-head screen h))
(dolist (h (intersection heads oheads :test '= :key 'head-number))
(let ((nh (find (head-number h) heads :test '= :key 'head-number))
(oh (find (head-number h) oheads :test '= :key 'head-number)))
(scale-head screen oh nh)))))
(defun head-force-refresh (screen new-heads)
(scale-screen screen new-heads)
(mapc 'group-sync-all-heads (screen-groups screen))
(update-mode-lines screen))
(defcommand refresh-heads (&optional (screen (current-screen))) ()
"Refresh screens in case a monitor was connected, but a
ConfigureNotify event was snarfed by another program."
(head-force-refresh screen (make-screen-heads screen (screen-root screen))))
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