From 515c45457341e26ca4d5898cd5043a9ac3d43623 Mon Sep 17 00:00:00 2001 From: Ralph Ronnquist Date: Mon, 8 May 2023 11:09:46 +1000 Subject: [PATCH 1/1] initial --- .gitweb | 2 + pinwin.lsp | 215 +++++++++++++++++++++++++++++++++++++++++++++++++++++ pinwin.md | 33 ++++++++ 3 files changed, 250 insertions(+) create mode 100644 .gitweb create mode 100644 pinwin.lsp create mode 100644 pinwin.md diff --git a/.gitweb b/.gitweb new file mode 100644 index 0000000..395c528 --- /dev/null +++ b/.gitweb @@ -0,0 +1,2 @@ +description = Making the side monitor sticky (for xfce4). +category = newlisp diff --git a/pinwin.lsp b/pinwin.lsp new file mode 100644 index 0000000..b4ee85f --- /dev/null +++ b/pinwin.lsp @@ -0,0 +1,215 @@ +#!/usr/local/bin/newlisp +# Copyright 2018, Ralph Ronnquist + +; This newlisp script is a "daemon" to make the right-hand monitor (in +; a horizontal Xinerama set up) "sticky". The script listens to X +; events so as to discover that a window is moved, and acts on it when +; it's placed. Specifically, when a window is placed to the right of +; the EDGE, it is pinned to be on all workspaces, and when it's placed +; to the left of the EDGE, it's unpinnned to be on the current +; workspace only. +; +; https://tronche.com/gui/x/xlib/ +; http://refspecs.linuxfoundation.org/LSB_3.1.1/LSB-Desktop-generic/LSB-Desktop-generic/libx11-ddefs.html +; https://specifications.freedesktop.org/wm-spec/1.3/index.html +; https://www.x.org/archive/X11R7.7/doc/man/man3/Xinerama.3.xhtml + +; Set up to die on ^C +(define (die x) (exit 0)) (signal 2 die) + +; Utility to return the first of a series of terms. +(define (prog1) (args 0)) + +; Read macro for the address at a byte offset into block

. +(macro (p@ P N) (+ (address P) N)) + +; Utility to unpack a packed binary array at

of layout +; records with fields each. +(define (unpack-array s w n p) (explode (unpack (dup s n) p) w)) + +; Making them available in all contexts. +(global 'prog1 'p@ 'unpack-array) + +(context 'MAIN:X11) ; API for libX11.so +(constant 'LIB "/usr/lib/x86_64-linux-gnu/libX11.so") ; Devuan 2.0 + +(import LIB "XDefaultRootWindow" "void*" + "void*" ; display + ) +(import LIB "XFree" "void" + "void*" ; data + ) +(import LIB "XGetWindowProperty" "int" + "void*" "void*" "long" ; display, window, property(atom) + "long" "long" "int" "long" ; long_offset, long_length, delete, req_type + "void*" "void*" ; actual_type_return, actual_format_return + "void*" "void*" ; nitems_return, bytes_after_return + "void*" ; prop_return + ) +(struct 'XGetWindowProperty_return + "long" ; actual_type_return + "int" ; actual_format_return + "long" ; nitems_return + "long" ; bytes_after_return + "void*" ; prop_return + ) +(import LIB "XInternAtom" "long" + "void*" "char*" "int" ; display, atom_name, only_if_exists + ) +(import LIB "XNextEvent" "void" + "void*" "void*" ; display, window + ) +(import LIB "XSendEvent" "int" + "void*" "void*" ; display, window + "int" "long" "void*" + ) +(import LIB "XOpenDisplay" "void*" + "void*" ; display + ) +(import LIB "XQueryTree" "int" + "void*" "void*" ; display, window + "void*" "void*" ; root_return, parent_return + "void*" "void*" ; children_return, nchildren_return + ) +(struct 'XQueryTree_return + "long" "long" ; root_return, parent_return + "long" "int" ; children_return, nchildren_return + ) +(import LIB "XSelectInput" "void" + "void*" "void*" "long" ; display, window, mask + ) +(struct 'XConfigureEvent + "int" "long" "int" ; type, serial, send_event + "void*" "void*" "void*" ; display, event, window + "int" "int" "int" "int" "int" ; x, y, width, height, border_width + "void*" "int" ; above, override_redirect + ) +(struct 'XCrossingEvent + "int" "long" "int" ; type, serial, send_event + "void*" "void*" "void*" "void*" ; display, window, root, subwindow + "long" ; time + "int" "int" "int" "int" ; x, y, x_root, y_root + "int" "int" ; mode, detail + "int" "int" "int" ; same_screen, focus, state + ) +(struct 'XClientMessageEvent + "int" "long" "int" ; type, serial, send_event + "void*" "void*" "void*" "void*" ; display, window + "long" "int" ; message_type, format + "long" "long" "long" "long" "long" ; data + ) + +; Initializing the X client, and defining some constants. +(constant + 'display (XOpenDisplay 0) + 'root (XDefaultRootWindow display) + '_NET_CURRENT_DESKTOP (XInternAtom display "_NET_CURRENT_DESKTOP" 1) + '_NET_WM_DESKTOP (XInternAtom display "_NET_WM_DESKTOP" 1) + 'LeaveWindowMask (<< 1 5) + 'SubstructureNotifyMask (<< 1 19) + 'PropertyChangeMask (<< 1 22) + 'LeaveNotify 8 + 'ConfigureNotify 22 + ) + +; Utility wrapping for XNextEvent. The "event" argument is the union +; of all possible event types, which all fit in a block of 24 long +; integers (192 bytes). +(define (nextEvent) + (let ((e (dup "\000" 192))) (XNextEvent display (p@ e 0)) e )) + +; Utility to map an X layer window to its "application window", which +; is the last child of the X layer window. This uses XQueryTree which +; has many return values (see XQueryTree_return). Note that the +; returned children array (r 2) is malloc-ed, and it needs to be +; XFree-ed. +(define (app-window w) + (let ((r (pack XQueryTree_return 0 0 0 0))) + (when (!= (XQueryTree display w (p@ r 0) (p@ r 8) (p@ r 16) (p@ r 24))) + (setf r (unpack XQueryTree_return r)) + (prog1 (if (!= (r 3)) ((unpack-array "Lu" 1 (r 3) (r 2)) -1 0)) + (XFree (r 2)))))) + +; Utility to obtain a long-valued property (atom named) from a window. +(define (get-property w a) + (let ((r (pack XGetWindowProperty_return 0 0 0 0 0))) + (when (XGetWindowProperty display w a 0 1 0 0 + (p@ r 0) (p@ r 8) (p@ r 16) (p@ r 24) (p@ r 32)) + (setf r (last (unpack XGetWindowProperty_return r))) + (when (!= r) (prog1 ((unpack "ld" r) 0) (XFree r) ))))) + +; Utility to obtain the current workspace. This is maintained as a +; property of the root window. (Called "desktop" in ancient times) +(define (current-workspace) (get-property root _NET_CURRENT_DESKTOP ) ) + +; Utility to obtain the worskpace property of a window. +(define (window-workspace w) (and w (get-property w _NET_WM_DESKTOP )) ) + +; Utility to set the workspace property for a window. Note that the +; targeted "application window" to pin or unpin is actually a child of +; the given X layer window (or "window manager window"). +(define (set-window-workspace w dt) + (let ((aw (app-window w))) + (and aw (!= dt (window-workspace aw)) + (XSendEvent display root 0 PropertyChangeMask + (pack XClientMessageEvent 33 0 0 display aw + _NET_WM_DESKTOP 32 dt 2 0 0 0) )) )) + +(context 'MAIN:Xinerama) ; API for libXinerama.so +(constant 'LIB "/usr/lib/x86_64-linux-gnu/libXinerama.so.1") ; Devuan 2.0 + +(import LIB "XineramaQueryScreens" "void*" ; XineramaScreenInfo* + "void*" ; Display *display + "void*" ; int *number + ) +(struct 'XineramaScreenInfo + "int" ; monitor index + "short int" "short int" "short int" "short int" ; x, y, width, height + ) + +; Utility to obtain the list of monitor physical dimensions +; Returns: ((id x y w h) ... ) +(define (queryScreens) + (letn ((e (pack "lu" 0)) + (p (XineramaQueryScreens X11:display (p@ e 0))) + (n ((unpack "lu" e) 0))) + (when (!= n) (prog1 (unpack-array "luuuuu" 5 n p) (X11:XFree p))) + )) + +(context MAIN) ; ---- The main application starts here ---- + +(setf + EDGE ((Xinerama:queryScreens) 0 3) ; width of monitor 0 + window nil ; last moved window and position (id x y) + ) + +; Handle XConfigureEvent by capturing window id and top-left +; coordinates. These events are issued while a window is moved. The +; last of them thus tells the last placement of the moved window. +(define (Configure e) + (setf window (select (unpack X11:XConfigureEvent e) 5 6 7))) + +; Handle XCrossingEvent events, identifying the "ungrab event" after +; having moved a window (i.e., releasing it at its last placement). At +; then, the most recently moved window is reviewed for placement, and +; its "workspace placement property" is set depending on where the +; window is relative to EDGE; either to the current workspace, or to +; -1, which means "all workspaces". +(define (Leave e) + (when (and window (= (& (last (unpack X11:XCrossingEvent e)) 0x100))) + (X11:set-window-workspace (window 0) + (if (>= (window 1) EDGE) -1 (X11:current-workspace))) )) + + ; Set up to receive certain events only. +(X11:XSelectInput + X11:display X11:root (| X11:SubstructureNotifyMask X11:LeaveWindowMask )) + +; Handle X events until the cows go home. +(letex ((L X11:LeaveNotify) (C X11:ConfigureNotify)) + (while (setf e (X11:nextEvent)) + (case ((unpack "lu" e) 0) ; the event type + ( L (Leave e)) + ( C (Configure e)) + (true nil)) )) + +(exit) diff --git a/pinwin.md b/pinwin.md new file mode 100644 index 0000000..d683da8 --- /dev/null +++ b/pinwin.md @@ -0,0 +1,33 @@ +pinwin - making the side monitor sticky +======================================= + +This is a pair of scripts acting as an X event daemon that recognizes +window movements and "pins" windows when moved to the side monitor, +whereas windows moved to the main monitor are "unpinned". + +A pinned window shows up on all workspaces, whereas an unpinned one +stays on a single workspace. + +I think some window managers might support the "pin windows on side +monitor" function already, but I couldn't find this for my xfce4. + +Note that the newlisp script `pinwin.lsp` implements the assumption +that the side monitor is to the right of the main monitor. Any other +set up will require an appropriate adjustment. + +BUILD +===== + +Note that daemonizing shell script `pinwin.sh` expects the embedded +binary, `pinwin`, which is made using the `-x` argument to newlisp. For +example: + + $ newlisp -x pinwin.lsp pinwin + $ chmod a+x pinwin + +RUN +=== + +The daemon is run as a detached process. For example: + + $ ( ./pinwin.sh & ) -- 2.39.2