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Message-ID: <20100901025817.GA6200@Krystal>
Date: Tue, 31 Aug 2010 22:58:17 -0400
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Pauli Nieminen <ext-pauli.nieminen@...ia.com>
Cc: Peter Zijlstra <peterz@...radead.org>,
Tony Lindgren <tony@...mide.com>,
Jarkko Nikula <jhnikula@...il.com>,
linux-kernel@...r.kernel.org, Pauli <suokkos@...il.com>
Subject: Re: IPC between application and xserver is causing extra context
switches
* Pauli Nieminen (ext-pauli.nieminen@...ia.com) wrote:
> Hi,
>
> While running rendering benchmark we noticed huge context switch numbers that
> were a lot larger than excepted. Numbers were showing 20-30 context switches
> per frame. Theoretical minimum context switches is less than 10.
>
> Problem was traced using FineToothComp (FTC) [1]. Tracing down to per
> instruction view what happens in system.
>
> Conext switches are relatively easy to track down from the trace
> visualization so it was easy to find out what was causing the extra context
> switches.
>
> * What application is doing when calling xserver?
>
> Application opens unix socket connection to xserver. Communication is based
> on simple message protocol. Application does following call sequence when
> communicating to xserver.
>
> writev(...) // Send message(s) to xserver
>
> poll(...) // wait for response(s) from xserver
>
> read(...) // read the response(s)
>
> * Where does extra context switches happen?
>
> Application developer would except that only poll call would trigger context
> switch. But in worst case every system call is triggering context switch.
>
> - writev()
>
> writev does implicit context switch in kernel after writing to socket. This
> isn't perfect behavior for asynchronous IPC because application might want to
> queue up more messages before context switch.
>
> This doesn't affect X communication because there is buffering implementation
> in xcb for asynchronous operations. But it might be good to fix for some
> other implementations that don't have buffering.
>
> - poll()
>
> But scheduling in writev backfires when poll is called. There is some X calls
> (DRI2GetBuffers etc) that takes very long to handle. While xserver is handlnig
> the request kernel decides to schedule client before there is response.
>
> Now client executes very few instructions before hitting the poll. Now poll
> blocks because there is no response from xserver.
Well, actually, I just traced it with LTTng, and the situation is a little
weird. Xorg does a read() system call on the unix socket, which triggers a
wakeup that targets xwininfo which is waiting on a poll(). The poll wakes up for
a very short amount of time, returns back to the kernel, and schedules xorg
again to complete the read() (it actually returns 8 bytes, even weirder). Then
later xwininfo will be woken up by the writev system call (which is a little
more expected).
I'm attaching a snapshot showing the event list pinpointing the exact execution
sequence. Any thoughts ?
>
> - read()
>
> Application hits read soon after returning from poll. xserver has gone to
> sleep in select call waiting for multiple file descriptor.
>
> When read call is returning from kernel unlocking the socket triggers xserver
> scheduling. This schedulnig never returns from kernel space but it iterates
> over all file descriptors that xserver is waiting for.
>
> * Test case
>
> There is relatively simple test case attached that can check if kernel is
> scheduling too many times. Test case is xwininfo tool modified not to output
> anything. Running it with -root and -tree parameters is generating lots of
> request for xserver.
>
> Compilation instructions are in xwininfo.c.
>
> test.sh can be used to automatically test if there was too many extra
> scheduling. In perfect case scheduling should be only twice the number of
> request.
>
> * Where the bug has been seen?
>
> I first saw this while doing development on arm. I have also tested a few x86
> kernels to see if problem can be reproduced there too. Problem was
> reproducing in most of configurations that I tested.
>
> broken:
> 2.6.32 (ARM)
> 2.6.28 (x86 Debian Lenny)
> 2.6.35-rc4 (x86 vanila, Ubuntu Karmic user space)
>
> But for my surprise I could find single working configuration that was my
> work desktop using Ubuntu kernel.
>
> correctly working:
> 2.6.31 (x86 Ubuntu Karmic)
I'd be careful about bissection between a Ubuntu kernel and mainline. Ubuntu can
add many tweaks to their kernels. An example of a tweak that makes the test
"pass" is:
echo NO_WAKEUP_PREEMPT > /debugfs/sched_features
(with CONFIG_DEBUG_SCHED=y)
Thanks,
Mathieu
>
> * Bisecting failed
>
> I tried to bisect if I could find the kernel commit that has fixed the
> problem for Ubuntu karmic but I hit problem that my self compiled kernels
> didn't boot. I don't have enough time now to try to do the bisecting.
>
> If bisecting would help I can try to find some time.
>
>
> There is still open question if the bug is caused by userspace doing stupid
> stuff with unix socket or actual kernel problem. But my debugging is pointing
> to kernel problem because same userspace hits the bug with different kernel.
>
> Pauli
>
> [1] QT blog post explaining what can be done with FTC
> http://labs.trolltech.com/blogs/2009/09/29/exploring-qt-performance-on-arm-using-finetoothcomb/
> /**
> * Compile: gcc -DHAVE_CONFIG_H -I. -g -O2 -o xwininfo xwininfo.c -lXext -lX11
> * test case:
> * 1. Count number of writes to xserver.
> * strace ./xwininfo -root -tree 2>&1 | grep writev | wc
> * 2. Compare that value to number of context switches happening while running
> * xwininfo.
> * vmstat -n 1 & sleep 3; ./xwininfo -root -tree; sleep 3; killall vmstat
> * 3. Compare how context switch numbers increase with number of runs
> * vmstat -n 1 & sleep 3; echo START; for i in 1 2; do ./xwininfo -root -tree; done; echo END; sleep 3; killall vmstat
> * vmstat -n 1 & sleep 3; echo START; for i in 1 2 3; do ./xwininfo -root -tree; done; echo END; sleep 3; killall vmstat
> * vmstat -n 1 & sleep 3; echo START; for i in 1 2 3 4 5; do ./xwininfo -root -tree; done; echo END; sleep 3; killall vmstat
> **/
>
> /* config.h. Generated from config.h.in by configure. */
> /* config.h.in. Generated from configure.ac by autoheader. */
>
> /* Define to 1 if you have the `strlcat' function. */
> /* #undef HAVE_STRLCAT */
>
> /* Name of package */
> #define PACKAGE "xwininfo"
>
> /* Define to the address where bug reports for this package should be sent. */
> #define PACKAGE_BUGREPORT "https://bugs.freedesktop.org/enter_bug.cgi?product=xorg"
>
> /* Define to the full name of this package. */
> #define PACKAGE_NAME "xwininfo"
>
> /* Define to the full name and version of this package. */
> #define PACKAGE_STRING "xwininfo 1.0.4"
>
> /* Define to the one symbol short name of this package. */
> #define PACKAGE_TARNAME "xwininfo"
>
> /* Define to the version of this package. */
> #define PACKAGE_VERSION "1.0.4"
>
> /* Major version of this package */
> #define PACKAGE_VERSION_MAJOR 1
>
> /* Minor version of this package */
> #define PACKAGE_VERSION_MINOR 0
>
> /* Patch version of this package */
> #define PACKAGE_VERSION_PATCHLEVEL 4
>
> /* Version number of package */
> #define VERSION "1.0.4"
>
>
> /*
> * Copyright 2007 Kim woelders
> *
> * Permission to use, copy, modify, distribute, and sell this software and its
> * documentation for any purpose is hereby granted without fee, provided that
> * the above copyright notice appear in all copies and that both that copyright
> * notice and this permission notice appear in supporting documentation, and
> * that the name of the copyright holders not be used in advertising or
> * publicity pertaining to distribution of the software without specific,
> * written prior permission. The copyright holders make no representations
> * about the suitability of this software for any purpose. It is provided "as
> * is" without express or implied warranty.
> *
> * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> * OF THIS SOFTWARE.
> */
> #ifndef _CLIENTWIN_H_
> #define _CLIENTWIN_H_
>
> #include <X11/Xlib.h>
>
> extern Window Find_Client(Display * dpy, Window root, Window target_win);
>
> #endif
>
>
> /* $Xorg: dsimple.h,v 1.4 2001/02/09 02:05:54 xorgcvs Exp $ */
> /*
>
> Copyright 1993, 1998 The Open Group
>
> Permission to use, copy, modify, distribute, and sell this software and its
> documentation for any purpose is hereby granted without fee, provided that
> the above copyright notice appear in all copies and that both that
> copyright notice and this permission notice appear in supporting
> documentation.
>
> The above copyright notice and this permission notice shall be included
> in all copies or substantial portions of the Software.
>
> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
> IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> OTHER DEALINGS IN THE SOFTWARE.
>
> Except as contained in this notice, the name of The Open Group shall
> not be used in advertising or otherwise to promote the sale, use or
> other dealings in this Software without prior written authorization
> from The Open Group.
>
> */
> /* $XFree86: xc/programs/xlsfonts/dsimple.h,v 1.8 2002/12/24 17:43:01 tsi Exp $ */
>
> /*
> * Just_display.h: This file contains the definitions needed to use the
> * functions in just_display.c. It also declares the global
> * variables dpy, screen, and program_name which are needed to
> * use just_display.c.
> *
> * Written by Mark Lillibridge. Last updated 7/1/87
> *
> * Send bugs, etc. to chariot@...ena.mit.edu.
> */
>
> /* Simple helper macros */
> #ifndef MAX
> #define MAX(a,b) (((a)>(b))?(a):(b))
> #endif /* MAX */
> #ifndef MIN
> #define MIN(a,b) (((a)<(b))?(a):(b))
> #endif /* MIN */
>
> /* Global variables used by routines in dsimple.c */
>
> extern char *program_name; /* Name of this program */
> extern Display *dpy; /* The current display */
> extern int screen; /* The current screen */
>
> #define INIT_NAME program_name=argv[0] /* use this in main to setup
> program_name */
>
> /* Declaritions for functions in dsimple.c */
>
> char *Get_Display_Name(int *, char **);
> Display *Open_Display(char *);
> void Setup_Display_And_Screen(int *, char **);
> void Close_Display(void);
> Window Select_Window_Args(int *, char **);
> void usage(void);
>
> #define X_USAGE "[host:display]" /* X arguments handled by
> Get_Display_Name */
>
> /*
> * Other_stuff.h: Definitions of routines in other_stuff.
> *
> * Written by Mark Lillibridge. Last updated 7/1/87
> *
> * Send bugs, etc. to chariot@...ena.mit.edu.
> */
>
> Window Select_Window(Display *, int);
> Window Window_With_Name(Display *, Window, char *);
> #ifdef __GNUC__
> void Fatal_Error(char *, ...) __attribute__((__noreturn__));
> #else
> void Fatal_Error(char *, ...);
> #endif
>
> /*
> * Copyright 2007 Kim woelders
> *
> * Permission to use, copy, modify, distribute, and sell this software and its
> * documentation for any purpose is hereby granted without fee, provided that
> * the above copyright notice appear in all copies and that both that copyright
> * notice and this permission notice appear in supporting documentation, and
> * that the name of the copyright holders not be used in advertising or
> * publicity pertaining to distribution of the software without specific,
> * written prior permission. The copyright holders make no representations
> * about the suitability of this software for any purpose. It is provided "as
> * is" without express or implied warranty.
> *
> * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
> * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
> * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
> * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
> * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
> * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
> * OF THIS SOFTWARE.
> */
> #include <X11/Xatom.h>
> #include <X11/Xlib.h>
>
> static Atom atom_wm_state = None;
>
> /*
> * Check if window has given property
> */
> static Bool
> Window_Has_Property(Display * dpy, Window win, Atom atom)
> {
> Atom type_ret;
> int format_ret;
> unsigned char *prop_ret;
> unsigned long bytes_after, num_ret;
>
> type_ret = None;
> prop_ret = NULL;
> XGetWindowProperty(dpy, win, atom, 0, 0, False, AnyPropertyType,
> &type_ret, &format_ret, &num_ret,
> &bytes_after, &prop_ret);
> if (prop_ret)
> XFree(prop_ret);
>
> return (type_ret != None) ? True : False;
> }
>
> /*
> * Check if window is viewable
> */
> static Bool
> Window_Is_Viewable(Display * dpy, Window win)
> {
> Bool ok;
> XWindowAttributes xwa;
>
> XGetWindowAttributes(dpy, win, &xwa);
>
> ok = (xwa.class == InputOutput) && (xwa.map_state == IsViewable);
>
> return ok;
> }
>
> /*
> * Find a window that has WM_STATE set in the window tree below win.
> * Unmapped/unviewable windows are not considered valid matches.
> * Children are searched in top-down stacking order.
> * The first matching window is returned, None if no match is found.
> */
> Window
> Find_Client_In_Children(Display * dpy, Window win)
> {
> Window root, parent;
> Window *children;
> unsigned int n_children;
> int i;
>
> if (!XQueryTree(dpy, win, &root, &parent, &children, &n_children))
> return None;
> if (!children)
> return None;
>
> /* Check each child for WM_STATE and other validity */
> win = None;
> for (i = (int) n_children - 1; i >= 0; i--) {
> if (!Window_Is_Viewable(dpy, children[i])) {
> children[i] = None; /* Don't bother descending into this one */
> continue;
> }
> if (!Window_Has_Property(dpy, children[i], atom_wm_state))
> continue;
>
> /* Got one */
> win = children[i];
> goto done;
> }
>
> /* No children matched, now descend into each child */
> for (i = (int) n_children - 1; i >= 0; i--) {
> if (children[i] == None)
> continue;
> win = Find_Client_In_Children(dpy, children[i]);
> if (win != None)
> break;
> }
>
> done:
> XFree(children);
>
> return win;
> }
>
> /*
> * Find virtual roots (_NET_VIRTUAL_ROOTS)
> */
> unsigned long *
> Find_Roots(Display * dpy, Window root, unsigned int *num)
> {
> Atom type_ret;
> int format_ret;
> unsigned char *prop_ret;
> unsigned long bytes_after, num_ret;
> Atom atom;
>
> *num = 0;
> atom = XInternAtom(dpy, "_NET_VIRTUAL_ROOTS", False);
> if (!atom)
> return NULL;
>
> type_ret = None;
> prop_ret = NULL;
> if (XGetWindowProperty(dpy, root, atom, 0, 0x7fffffff, False,
> XA_WINDOW, &type_ret, &format_ret, &num_ret,
> &bytes_after, &prop_ret) != Success)
> return NULL;
>
> if (prop_ret && type_ret == XA_WINDOW && format_ret == 32) {
> *num = num_ret;
> return ((unsigned long *) prop_ret);
> }
> if (prop_ret)
> XFree(prop_ret);
>
> return NULL;
> }
>
> /*
> * Find child window at pointer location
> */
> static Window
> Find_Child_At_Pointer(Display * dpy, Window win)
> {
> Window root_return, child_return;
> int dummyi;
> unsigned int dummyu;
>
> XQueryPointer(dpy, win, &root_return, &child_return,
> &dummyi, &dummyi, &dummyi, &dummyi, &dummyu);
>
> return child_return;
> }
>
> /*
> * Find client window at pointer location
> *
> * root is the root window.
> * subwin is the subwindow reported by a ButtonPress event on root.
> *
> * If the WM uses virtual roots subwin may be a virtual root.
> * If so, we descend the window stack at the pointer location and assume the
> * child is the client or one of its WM frame windows.
> * This will of course work only if the virtual roots are children of the real
> * root.
> */
> Window
> Find_Client(Display * dpy, Window root, Window subwin)
> {
> unsigned long *roots;
> unsigned int i, n_roots;
> Window win;
>
> /* Check if subwin is a virtual root */
> roots = Find_Roots(dpy, root, &n_roots);
> for (i = 0; i < n_roots; i++) {
> if (subwin != roots[i])
> continue;
> win = Find_Child_At_Pointer(dpy, subwin);
> if (win == None)
> return subwin; /* No child - Return virtual root. */
> subwin = win;
> break;
> }
> if (roots)
> XFree(roots);
>
> if (atom_wm_state == None) {
> atom_wm_state = XInternAtom(dpy, "WM_STATE", False);
> if (!atom_wm_state)
> return subwin;
> }
>
> /* Check if subwin has WM_STATE */
> if (Window_Has_Property(dpy, subwin, atom_wm_state))
> return subwin;
>
> /* Attempt to find a client window in subwin's children */
> win = Find_Client_In_Children(dpy, subwin);
> if (win != None)
> return win; /* Found a client */
>
> /* Did not find a client */
> return subwin;
> }
> /* $Xorg: dsimple.c,v 1.4 2001/02/09 02:05:54 xorgcvs Exp $ */
> /*
>
> Copyright 1993, 1998 The Open Group
>
> Permission to use, copy, modify, distribute, and sell this software and its
> documentation for any purpose is hereby granted without fee, provided that
> the above copyright notice appear in all copies and that both that
> copyright notice and this permission notice appear in supporting
> documentation.
>
> The above copyright notice and this permission notice shall be included
> in all copies or substantial portions of the Software.
>
> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
> IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> OTHER DEALINGS IN THE SOFTWARE.
>
> Except as contained in this notice, the name of The Open Group shall
> not be used in advertising or otherwise to promote the sale, use or
> other dealings in this Software without prior written authorization
> from The Open Group.
>
> */
> /* $XFree86: xc/programs/xlsfonts/dsimple.c,v 3.6 2001/12/14 20:02:09 dawes Exp $ */
>
> #include <X11/Xos.h>
> #include <X11/Xlib.h>
> #include <X11/Xutil.h>
> #include <X11/cursorfont.h>
> #include <stdio.h>
> #include <stdlib.h>
> #include <stdarg.h>
> /*
> * Other_stuff.h: Definitions of routines in other_stuff.
> *
> * Written by Mark Lillibridge. Last updated 7/1/87
> */
>
>
> /*
> * Just_display: A group of routines designed to make the writing of simple
> * X11 applications which open a display but do not open
> * any windows much faster and easier. Unless a routine says
> * otherwise, it may be assumed to require program_name, dpy,
> * and screen already defined on entry.
> *
> * Written by Mark Lillibridge. Last updated 7/1/87
> */
>
>
> /* This stuff is defined in the calling program by just_display.h */
> char *program_name = "unknown_program";
> Display *dpy = NULL;
> int screen = 0;
>
>
> /*
> * Get_Display_Name (argc, argv) Look for -display, -d, or host:dpy (obselete)
> * If found, remove it from command line. Don't go past a lone -.
> */
> char *Get_Display_Name(
> int *pargc, /* MODIFIED */
> char **argv) /* MODIFIED */
> {
> int argc = *pargc;
> char **pargv = argv+1;
> char *displayname = NULL;
> int i;
>
> for (i = 1; i < argc; i++) {
> char *arg = argv[i];
>
> if (!strcmp (arg, "-display") || !strcmp (arg, "-d")) {
> if (++i >= argc) usage ();
>
> displayname = argv[i];
> *pargc -= 2;
> continue;
> }
> if (!strcmp(arg,"-")) {
> while (i<argc)
> *pargv++ = argv[i++];
> break;
> }
> *pargv++ = arg;
> }
>
> *pargv = NULL;
> return (displayname);
> }
>
>
>
> /*
> * Open_Display: Routine to open a display with correct error handling.
> * Does not require dpy or screen defined on entry.
> */
> Display *Open_Display(char *display_name)
> {
> Display *d;
>
> d = XOpenDisplay(display_name);
> if (d == NULL) {
> fprintf (stderr, "%s: unable to open display '%s'\n",
> program_name, XDisplayName (display_name));
> usage ();
> /* doesn't return */
> }
>
> return(d);
> }
>
>
> /*
> * Setup_Display_And_Screen: This routine opens up the correct display (i.e.,
> * it calls Get_Display_Name) and then stores a
> * pointer to it in dpy. The default screen
> * for this display is then stored in screen.
> * Does not require dpy or screen defined.
> */
> void Setup_Display_And_Screen(
> int *argc, /* MODIFIED */
> char **argv) /* MODIFIED */
> {
> char *displayname = NULL;
>
> displayname = Get_Display_Name(argc, argv);
> dpy = Open_Display (displayname);
> screen = XDefaultScreen(dpy);
> }
>
> /*
> * Close_Display: Close display
> */
> void Close_Display(void)
> {
> if (dpy == NULL)
> return;
>
> XCloseDisplay(dpy);
> dpy = NULL;
> }
>
>
> /*
> * Select_Window_Args: a rountine to provide a common interface for
> * applications that need to allow the user to select one
> * window on the screen for special consideration.
> * This routine implements the following command line
> * arguments:
> *
> * -root Selects the root window.
> * -id <id> Selects window with id <id>. <id> may
> * be either in decimal or hex.
> * -name <name> Selects the window with name <name>.
> *
> * Call as Select_Window_Args(&argc, argv) in main before
> * parsing any of your program's command line arguments.
> * Select_Window_Args will remove its arguments so that
> * your program does not have to worry about them.
> * The window returned is the window selected or 0 if
> * none of the above arguments was present. If 0 is
> * returned, Select_Window should probably be called after
> * all command line arguments, and other setup is done.
> * For examples of usage, see xwininfo, xwd, or xprop.
> */
> Window Select_Window_Args(
> int *rargc,
> char **argv)
> #define ARGC (*rargc)
> {
> int nargc=1;
> int argc;
> char **nargv;
> Window w=0;
>
> nargv = argv+1; argc = ARGC;
> #define OPTION argv[0]
> #define NXTOPTP ++argv, --argc>0
> #define NXTOPT if (++argv, --argc==0) usage()
> #define COPYOPT nargv++[0]=OPTION, nargc++
>
> while (NXTOPTP) {
> if (!strcmp(OPTION, "-")) {
> COPYOPT;
> while (NXTOPTP)
> COPYOPT;
> break;
> }
> if (!strcmp(OPTION, "-root")) {
> w=RootWindow(dpy, screen);
> continue;
> }
> if (!strcmp(OPTION, "-name")) {
> NXTOPT;
> w = Window_With_Name(dpy, RootWindow(dpy, screen),
> OPTION);
> if (!w)
> Fatal_Error("No window with name %s exists!",OPTION);
> continue;
> }
> if (!strcmp(OPTION, "-id")) {
> NXTOPT;
> w=0;
> sscanf(OPTION, "0x%lx", &w);
> if (!w)
> sscanf(OPTION, "%lu", &w);
> if (!w)
> Fatal_Error("Invalid window id format: %s.", OPTION);
> continue;
> }
> COPYOPT;
> }
> ARGC = nargc;
>
> return(w);
> }
>
> /*
> * Other_stuff: A group of routines which do common X11 tasks.
> *
> * Written by Mark Lillibridge. Last updated 7/1/87
> */
>
>
> /*
> * Routine to let user select a window using the mouse
> */
>
> Window Select_Window(Display *dpy, int descend)
> {
> int status;
> Cursor cursor;
> XEvent event;
> Window target_win = None, root = RootWindow(dpy,screen);
> int buttons = 0;
>
> /* Make the target cursor */
> cursor = XCreateFontCursor(dpy, XC_crosshair);
>
> /* Grab the pointer using target cursor, letting it room all over */
> status = XGrabPointer(dpy, root, False,
> ButtonPressMask|ButtonReleaseMask, GrabModeSync,
> GrabModeAsync, root, cursor, CurrentTime);
> if (status != GrabSuccess) Fatal_Error("Can't grab the mouse.");
>
> /* Let the user select a window... */
> while ((target_win == None) || (buttons != 0)) {
> /* allow one more event */
> XAllowEvents(dpy, SyncPointer, CurrentTime);
> XWindowEvent(dpy, root, ButtonPressMask|ButtonReleaseMask, &event);
> switch (event.type) {
> case ButtonPress:
> if (target_win == None) {
> target_win = event.xbutton.subwindow; /* window selected */
> if (target_win == None) target_win = root;
> }
> buttons++;
> break;
> case ButtonRelease:
> if (buttons > 0) /* there may have been some down before we started */
> buttons--;
> break;
> }
> }
>
> XUngrabPointer(dpy, CurrentTime); /* Done with pointer */
>
> if (!descend || (target_win == root))
> return(target_win);
>
> target_win = Find_Client(dpy, root, target_win);
>
> return(target_win);
> }
>
>
> /*
> * Window_With_Name: routine to locate a window with a given name on a display.
> * If no window with the given name is found, 0 is returned.
> * If more than one window has the given name, the first
> * one found will be returned. Only top and its subwindows
> * are looked at. Normally, top should be the RootWindow.
> */
> Window Window_With_Name(
> Display *dpy,
> Window top,
> char *name)
> {
> Window *children, dummy;
> unsigned int nchildren;
> int i;
> Window w=0;
> char *window_name;
>
> if (XFetchName(dpy, top, &window_name) && !strcmp(window_name, name))
> return(top);
>
> if (!XQueryTree(dpy, top, &dummy, &dummy, &children, &nchildren))
> return(0);
>
> for (i=0; i<nchildren; i++) {
> w = Window_With_Name(dpy, children[i], name);
> if (w)
> break;
> }
> if (children) XFree ((char *)children);
> return(w);
> }
>
>
> /*
> * Standard fatal error routine - call like printf
> * Does not require dpy or screen defined.
> */
> void Fatal_Error(char *msg, ...)
> {
> va_list args;
> fflush(stdout);
> fflush(stderr);
> fprintf(stderr, "%s: error: ", program_name);
> va_start(args, msg);
> vfprintf(stderr, msg, args);
> va_end(args);
> fprintf(stderr, "\n");
> Close_Display();
> exit(EXIT_FAILURE);
> }
> /* $XdotOrg: $ */
> /* $Xorg: xwininfo.c,v 1.4 2001/02/09 02:06:04 xorgcvs Exp $ */
> /*
>
> Copyright 1987, 1998 The Open Group
> Copyright 1999 Sun Microsystems, Inc.
>
> Permission to use, copy, modify, distribute, and sell this software and its
> documentation for any purpose is hereby granted without fee, provided that
> the above copyright notice appear in all copies and that both that
> copyright notice and this permission notice appear in supporting
> documentation.
>
> The above copyright notice and this permission notice shall be included
> in all copies or substantial portions of the Software.
>
> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
> OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
> HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
> INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
> FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
> NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
> WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
>
> Except as contained in this notice, the name of a copyright holder
> shall not be used in advertising or otherwise to promote the sale, use
> or other dealings in this Software without prior written authorization
> of the copyright holder.
>
> */
> /* $XFree86: xc/programs/xwininfo/xwininfo.c,v 1.9 2003/09/09 22:08:25 herrb Exp $ */
>
>
> /*
> * xwininfo.c - MIT Project Athena, X Window system window
> * information utility.
> *
> *
> * This program will report all relevant information
> * about a specific window.
> *
> * Author: Mark Lillibridge, MIT Project Athena
> * 16-Jun-87
> */
>
> #include <X11/Xlib.h>
> #include <X11/Xutil.h>
> #include <X11/Xatom.h>
> #include <X11/Xos.h>
> #include <X11/extensions/shape.h>
> #ifndef NO_I18N
> #include <X11/Xlocale.h>
> #endif
> #include <stdio.h>
> #include <stdlib.h>
>
> /* Include routines to handle parsing defaults */
>
> #define printf /* */
>
> typedef struct {
> long code;
> const char *name;
> } binding;
>
> static void scale_init(void);
> static char *nscale(int, int, int, char *, size_t);
> static char *xscale(int);
> static char *yscale(int);
> static char *bscale(int);
> static int bad_window_handler(Display *, XErrorEvent *);
> int main(int, char **);
> static const char *LookupL(long, const binding *);
> static const char *Lookup(int, const binding *);
> static void Display_Window_Id(Window, int);
> static void Display_Stats_Info(Window);
> static void Display_Bits_Info(Window);
> static void Display_Event_Mask(long);
> static void Display_Events_Info(Window);
> static void Display_Tree_Info(Window, int);
> static void display_tree_info_1(Window, int, int);
> static void Display_Hints(XSizeHints *);
> static void Display_Size_Hints(Window);
> static void Display_Window_Shape(Window);
> static void Display_WM_Info(Window);
>
> static char *window_id_format = "0x%lx";
>
> #ifndef HAVE_STRLCAT
> static size_t strlcat(char *dst, const char *src, size_t dstsize)
> {
> size_t sd = strlen(dst);
> size_t ss = strlen(src);
> size_t s = sd + ss;
>
> if (s < dstsize) {
> strcpy(dst + sd, src);
> } else {
> strncpy(dst + sd, src, dstsize-sd-1);
> dst[dstsize] = '\0';
> }
> return s;
> }
> #endif
>
> /*
> * Report the syntax for calling xwininfo:
> */
> void
> usage(void)
> {
> fprintf (stderr,
> "usage: %s [-options ...]\n\n", program_name);
> fprintf (stderr,
> "where options include:\n");
> fprintf (stderr,
> " -help print this message\n");
> fprintf (stderr,
> " -display host:dpy X server to contact\n");
> fprintf (stderr,
> " -root use the root window\n");
> fprintf (stderr,
> " -id windowid use the window with the specified id\n");
> fprintf (stderr,
> " -name windowname use the window with the specified name\n");
> fprintf (stderr,
> " -int print window id in decimal\n");
> fprintf (stderr,
> " -children print parent and child identifiers\n");
> fprintf (stderr,
> " -tree print children identifiers recursively\n");
> fprintf (stderr,
> " -stats print window geometry [DEFAULT]\n");
> fprintf (stderr,
> " -bits print window pixel information\n");
> fprintf (stderr,
> " -events print events selected for on window\n");
> fprintf (stderr,
> " -size print size hints\n");
> fprintf (stderr,
> " -wm print window manager hints\n");
> fprintf (stderr,
> " -shape print shape extents\n");
> fprintf (stderr,
> " -frame don't ignore window manager frames\n");
> fprintf (stderr,
> " -english print sizes in english units\n");
> fprintf (stderr,
> " -metric print sizes in metric units\n");
> fprintf (stderr,
> " -all -tree, -stats, -bits, -events, -wm, -size, -shape\n");
> fprintf (stderr,
> "\n");
> exit (1);
> }
>
> /*
> * pixel to inch, metric converter.
> * Hacked in by Mark W. Eichin <eichin@...ena> [eichin:19880619.1509EST]
> *
> * Simply put: replace the old numbers with string print calls.
> * Returning a local string is ok, since we only ever get called to
> * print one x and one y, so as long as they don't collide, they're
> * fine. This is not meant to be a general purpose routine.
> *
> */
>
> #define getdsp(var,fn) var = fn(dpy, DefaultScreen(dpy))
> static int xp=0, xmm=0;
> static int yp=0, ymm=0;
> static int bp=0, bmm=0;
> static int english = 0, metric = 0;
>
> static void
> scale_init(void)
> {
> getdsp(yp, DisplayHeight);
> getdsp(ymm, DisplayHeightMM);
> getdsp(xp, DisplayWidth);
> getdsp(xmm, DisplayWidthMM);
> bp = xp + yp;
> bmm = xmm + ymm;
> }
>
> #define MILE (5280*12)
> #define YARD (3*12)
> #define FOOT (12)
>
> static char *
> nscale(int n, int np, int nmm, char *nbuf, size_t nbufsize)
> {
> int s;
> snprintf(nbuf, nbufsize, "%d", n);
>
> if (metric||english) {
> s = strlcat(nbuf, " (", nbufsize);
>
> if (metric) {
> snprintf(nbuf+s, nbufsize-s, "%.2f mm%s",
> ((double) n)*nmm/np, english ? "; " : "");
> }
> if (english) {
> double inch_frac;
> Bool printed_anything = False;
> int mi, yar, ft, inr;
>
> inch_frac = ((double) n)*(nmm/25.4)/np;
> inr = (int)inch_frac;
> inch_frac -= (double)inr;
> if (inr >= MILE) {
> mi = inr/MILE;
> inr %= MILE;
> s = strlen(nbuf);
> snprintf(nbuf+s, nbufsize-s, "%d %s(?!?)",
> mi, (mi==1) ? "mile" : "miles");
> printed_anything = True;
> }
> if (inr >= YARD) {
> yar = inr/YARD;
> inr %= YARD;
> if (printed_anything)
> strlcat(nbuf, ", ", nbufsize);
> s = strlen(nbuf);
> snprintf(nbuf+s, nbufsize-s, "%d %s",
> yar, (yar==1) ? "yard" : "yards");
> printed_anything = True;
> }
> if (inr >= FOOT) {
> ft = inr/FOOT;
> inr %= FOOT;
> if (printed_anything)
> strlcat(nbuf, ", ", nbufsize);
> s = strlen(nbuf);
> snprintf(nbuf+s, nbufsize-s, "%d %s",
> ft, (ft==1) ? "foot" : "feet");
> printed_anything = True;
> }
> if (!printed_anything || inch_frac != 0.0 || inr != 0) {
> if (printed_anything)
> strlcat(nbuf, ", ", nbufsize);
> s = strlen(nbuf);
> snprintf(nbuf+s, nbufsize-s, "%.2f inches", inr+inch_frac);
> }
> }
> strlcat (nbuf, ")", nbufsize);
> }
> return(nbuf);
> }
>
> static char xbuf[BUFSIZ];
> static char *
> xscale(int x)
> {
> if(!xp) {
> scale_init();
> }
> return(nscale(x, xp, xmm, xbuf, sizeof(xbuf)));
> }
>
> static char ybuf[BUFSIZ];
> static char *
> yscale(int y)
> {
> if(!yp) {
> scale_init();
> }
> return(nscale(y, yp, ymm, ybuf, sizeof(ybuf)));
> }
>
> static char bbuf[BUFSIZ];
> static char *
> bscale(int b)
> {
> if(!bp) {
> scale_init();
> }
> return(nscale(b, bp, bmm, bbuf, sizeof(bbuf)));
> }
>
> /* end of pixel to inch, metric converter */
>
> /* This handler is enabled when we are checking
> to see if the -id the user specified is valid. */
>
> /* ARGSUSED */
> static int
> bad_window_handler(Display *disp, XErrorEvent *err)
> {
> char badid[20];
>
> snprintf(badid, sizeof(badid), window_id_format, err->resourceid);
> Fatal_Error("No such window with id %s.", badid);
> exit (1);
> return 0;
> }
>
>
> int
> main(int argc, char **argv)
> {
> register int i;
> int tree = 0, stats = 0, bits = 0, events = 0, wm = 0, size = 0, shape = 0;
> int frame = 0, children = 0;
> Window window;
>
> INIT_NAME;
>
> #ifndef NO_I18N
> {
> char *lc;
> lc = setlocale(LC_ALL, "");
> if(!lc)
> fprintf(stderr, "can not set locale properly\n");
> }
> #endif
>
> /* Open display, handle command line arguments */
> Setup_Display_And_Screen(&argc, argv);
>
> /* Get window selected on command line, if any */
> window = Select_Window_Args(&argc, argv);
>
> /* Handle our command line arguments */
> for (i = 1; i < argc; i++) {
> if (!strcmp(argv[i], "-help"))
> usage();
> if (!strcmp(argv[i], "-int")) {
> window_id_format = "%ld";
> continue;
> }
> if (!strcmp(argv[i], "-children")) {
> children = 1;
> continue;
> }
> if (!strcmp(argv[i], "-tree")) {
> tree = 1;
> continue;
> }
> if (!strcmp(argv[i], "-stats")) {
> stats = 1;
> continue;
> }
> if (!strcmp(argv[i], "-bits")) {
> bits = 1;
> continue;
> }
> if (!strcmp(argv[i], "-events")) {
> events = 1;
> continue;
> }
> if (!strcmp(argv[i], "-wm")) {
> wm = 1;
> continue;
> }
> if (!strcmp(argv[i], "-frame")) {
> frame = 1;
> continue;
> }
> if (!strcmp(argv[i], "-size")) {
> size = 1;
> continue;
> }
> if (!strcmp(argv[i], "-shape")) {
> shape = 1;
> continue;
> }
> if (!strcmp(argv[i], "-english")) {
> english = 1;
> continue;
> }
> if (!strcmp(argv[i], "-metric")) {
> metric = 1;
> continue;
> }
> if (!strcmp(argv[i], "-all")) {
> tree = stats = bits = events = wm = size = shape = 1;
> continue;
> }
> usage();
> }
>
> /* If no window selected on command line, let user pick one the hard way */
> if (!window) {
> printf("\n");
> printf("xwininfo: Please select the window about which you\n");
> printf(" would like information by clicking the\n");
> printf(" mouse in that window.\n");
> window = Select_Window(dpy, !frame);
> }
>
> /*
> * Do the actual displaying as per parameters
> */
> if (!(children || tree || bits || events || wm || size))
> stats = 1;
>
> /*
> * make sure that the window is valid
> */
> {
> Window root;
> int x, y;
> unsigned width, height, bw, depth;
> XErrorHandler old_handler;
>
> old_handler = XSetErrorHandler(bad_window_handler);
> XGetGeometry (dpy, window, &root, &x, &y, &width, &height, &bw, &depth);
> XSync (dpy, False);
> (void) XSetErrorHandler(old_handler);
> }
>
> printf("\nxwininfo: Window id: ");
> Display_Window_Id(window, True);
> if (children || tree)
> Display_Tree_Info(window, tree);
> if (stats)
> Display_Stats_Info(window);
> if (bits)
> Display_Bits_Info(window);
> if (events)
> Display_Events_Info(window);
> if (wm)
> Display_WM_Info(window);
> if (size)
> Display_Size_Hints(window);
> if (shape)
> Display_Window_Shape(window);
> printf("\n");
> exit(0);
> }
>
>
> /*
> * Lookup: lookup a code in a table.
> */
> static char _lookup_buffer[100];
>
> static const char *
> LookupL(long code, const binding *table)
> {
> const char *name;
>
> snprintf(_lookup_buffer, sizeof(_lookup_buffer),
> "unknown (code = %ld. = 0x%lx)", code, code);
> name = _lookup_buffer;
>
> while (table->name) {
> if (table->code == code) {
> name = table->name;
> break;
> }
> table++;
> }
>
> return(name);
> }
>
> static const char *
> Lookup(int code, const binding *table)
> {
> return LookupL((long)code, table);
> }
>
> /*
> * Routine to display a window id in dec/hex with name if window has one
> */
>
> static void
> Display_Window_Id(Window window, Bool newline_wanted)
> {
> #ifdef NO_I18N
> char *win_name;
> #else
> XTextProperty tp;
> #endif
>
> printf(window_id_format, window); /* print id # in hex/dec */
>
> if (!window) {
> printf(" (none)");
> } else {
> if (window == RootWindow(dpy, screen)) {
> printf(" (the root window)");
> }
> #ifdef NO_I18N
> if (!XFetchName(dpy, window, &win_name)) { /* Get window name if any */
> printf(" (has no name)");
> } else if (win_name) {
> printf(" \"%s\"", win_name);
> XFree(win_name);
> }
> #else
> if (!XGetWMName(dpy, window, &tp)) { /* Get window name if any */
> printf(" (has no name)");
> } else if (tp.nitems > 0) {
> printf(" \"");
> {
> int count = 0, i, ret;
> char **list = NULL;
> ret = XmbTextPropertyToTextList(dpy, &tp, &list, &count);
> if((ret == Success || ret > 0) && list != NULL){
> for(i=0; i<count; i++)
> printf("%s", list[i]);
> XFreeStringList(list);
> } else {
> printf("%s", tp.value);
> }
> }
> printf("\"");
> }
> #endif
> else
> printf(" (has no name)");
> }
>
> if (newline_wanted)
> printf("\n");
>
> return;
> }
>
>
> /*
> * Display Stats on window
> */
> static const binding _window_classes[] = {
> { InputOutput, "InputOutput" },
> { InputOnly, "InputOnly" },
> { 0, 0 } };
>
> static const binding _map_states[] = {
> { IsUnmapped, "IsUnMapped" },
> { IsUnviewable, "IsUnviewable" },
> { IsViewable, "IsViewable" },
> { 0, 0 } };
>
> static const binding _backing_store_states[] = {
> { NotUseful, "NotUseful" },
> { WhenMapped, "WhenMapped" },
> { Always, "Always" },
> { 0, 0 } };
>
> static const binding _bit_gravity_states[] = {
> { ForgetGravity, "ForgetGravity" },
> { NorthWestGravity, "NorthWestGravity" },
> { NorthGravity, "NorthGravity" },
> { NorthEastGravity, "NorthEastGravity" },
> { WestGravity, "WestGravity" },
> { CenterGravity, "CenterGravity" },
> { EastGravity, "EastGravity" },
> { SouthWestGravity, "SouthWestGravity" },
> { SouthGravity, "SouthGravity" },
> { SouthEastGravity, "SouthEastGravity" },
> { StaticGravity, "StaticGravity" },
> { 0, 0 }};
>
> static const binding _window_gravity_states[] = {
> { UnmapGravity, "UnmapGravity" },
> { NorthWestGravity, "NorthWestGravity" },
> { NorthGravity, "NorthGravity" },
> { NorthEastGravity, "NorthEastGravity" },
> { WestGravity, "WestGravity" },
> { CenterGravity, "CenterGravity" },
> { EastGravity, "EastGravity" },
> { SouthWestGravity, "SouthWestGravity" },
> { SouthGravity, "SouthGravity" },
> { SouthEastGravity, "SouthEastGravity" },
> { StaticGravity, "StaticGravity" },
> { 0, 0 }};
>
> static const binding _visual_classes[] = {
> { StaticGray, "StaticGray" },
> { GrayScale, "GrayScale" },
> { StaticColor, "StaticColor" },
> { PseudoColor, "PseudoColor" },
> { TrueColor, "TrueColor" },
> { DirectColor, "DirectColor" },
> { 0, 0 }};
>
> static void
> Display_Stats_Info(Window window)
> {
> XWindowAttributes win_attributes;
> XVisualInfo vistemplate, *vinfo;
> XSizeHints hints;
> int dw = DisplayWidth (dpy, screen), dh = DisplayHeight (dpy, screen);
> int rx, ry, xright, ybelow;
> int showright = 0, showbelow = 0;
> Status status;
> Window wmframe;
> int junk;
> long longjunk;
> Window junkwin;
>
> if (!XGetWindowAttributes(dpy, window, &win_attributes))
> Fatal_Error("Can't get window attributes.");
> vistemplate.visualid = XVisualIDFromVisual(win_attributes.visual);
> vinfo = XGetVisualInfo(dpy, VisualIDMask, &vistemplate, &junk);
>
> (void) XTranslateCoordinates (dpy, window, win_attributes.root,
> -win_attributes.border_width,
> -win_attributes.border_width,
> &rx, &ry, &junkwin);
>
> xright = (dw - rx - win_attributes.border_width * 2 -
> win_attributes.width);
> ybelow = (dh - ry - win_attributes.border_width * 2 -
> win_attributes.height);
>
> printf("\n");
> printf(" Absolute upper-left X: %s\n", xscale(rx));
> printf(" Absolute upper-left Y: %s\n", yscale(ry));
> printf(" Relative upper-left X: %s\n", xscale(win_attributes.x));
> printf(" Relative upper-left Y: %s\n", yscale(win_attributes.y));
> printf(" Width: %s\n", xscale(win_attributes.width));
> printf(" Height: %s\n", yscale(win_attributes.height));
> printf(" Depth: %d\n", win_attributes.depth);
> printf(" Visual Class: %s\n", Lookup(vinfo->class, _visual_classes));
> printf(" Border width: %s\n", bscale(win_attributes.border_width));
> printf(" Class: %s\n",
> Lookup(win_attributes.class, _window_classes));
> printf(" Colormap: 0x%lx (%sinstalled)\n",
> win_attributes.colormap, win_attributes.map_installed ? "" : "not ");
> printf(" Bit Gravity State: %s\n",
> Lookup(win_attributes.bit_gravity, _bit_gravity_states));
> printf(" Window Gravity State: %s\n",
> Lookup(win_attributes.win_gravity, _window_gravity_states));
> printf(" Backing Store State: %s\n",
> Lookup(win_attributes.backing_store, _backing_store_states));
> printf(" Save Under State: %s\n",
> win_attributes.save_under ? "yes" : "no");
> printf(" Map State: %s\n",
> Lookup(win_attributes.map_state, _map_states));
> printf(" Override Redirect State: %s\n",
> win_attributes.override_redirect ? "yes" : "no");
> printf(" Corners: +%d+%d -%d+%d -%d-%d +%d-%d\n",
> rx, ry, xright, ry, xright, ybelow, rx, ybelow);
>
> XFree(vinfo);
>
> /*
> * compute geometry string that would recreate window
> */
> printf(" -geometry ");
>
> /* compute size in appropriate units */
> status = XGetWMNormalHints(dpy, window, &hints, &longjunk);
> if (status && hints.flags & PResizeInc &&
> hints.width_inc != 0 && hints.height_inc != 0) {
> if (hints.flags & (PBaseSize|PMinSize)) {
> if (hints.flags & PBaseSize) {
> win_attributes.width -= hints.base_width;
> win_attributes.height -= hints.base_height;
> } else {
> /* ICCCM says MinSize is default for BaseSize */
> win_attributes.width -= hints.min_width;
> win_attributes.height -= hints.min_height;
> }
> }
> printf("%dx%d", win_attributes.width/hints.width_inc,
> win_attributes.height/hints.height_inc);
> } else
> printf("%dx%d", win_attributes.width, win_attributes.height);
>
> if (!(hints.flags&PWinGravity))
> hints.win_gravity = NorthWestGravity; /* per ICCCM */
> /* find our window manager frame, if any */
> wmframe = window;
> while (True) {
> Window root, parent;
> Window *childlist;
> unsigned int ujunk;
>
> status = XQueryTree(dpy, wmframe, &root, &parent, &childlist, &ujunk);
> if (parent == root || !parent || !status)
> break;
> wmframe = parent;
> if (status && childlist)
> XFree((char *)childlist);
> }
> if (wmframe != window) {
> /* WM reparented, so find edges of the frame */
> /* Only works for ICCCM-compliant WMs, and then only if the
> window has corner gravity. We would need to know the original width
> of the window to correctly handle the other gravities. */
>
> XWindowAttributes frame_attr;
>
> if (!XGetWindowAttributes(dpy, wmframe, &frame_attr))
> Fatal_Error("Can't get frame attributes.");
> switch (hints.win_gravity) {
> case NorthWestGravity: case SouthWestGravity:
> case NorthEastGravity: case SouthEastGravity:
> case WestGravity:
> rx = frame_attr.x;
> }
> switch (hints.win_gravity) {
> case NorthWestGravity: case SouthWestGravity:
> case NorthEastGravity: case SouthEastGravity:
> case EastGravity:
> xright = dw - frame_attr.x - frame_attr.width -
> 2*frame_attr.border_width;
> }
> switch (hints.win_gravity) {
> case NorthWestGravity: case SouthWestGravity:
> case NorthEastGravity: case SouthEastGravity:
> case NorthGravity:
> ry = frame_attr.y;
> }
> switch (hints.win_gravity) {
> case NorthWestGravity: case SouthWestGravity:
> case NorthEastGravity: case SouthEastGravity:
> case SouthGravity:
> ybelow = dh - frame_attr.y - frame_attr.height -
> 2*frame_attr.border_width;
> }
> }
> /* If edge gravity, offer a corner on that edge (because the application
> programmer cares about that edge), otherwise offer upper left unless
> some other corner is close to an edge of the screen.
> (For corner gravity, assume gravity was set by XWMGeometry.
> For CenterGravity, it doesn't matter.) */
> if (hints.win_gravity == EastGravity ||
> (abs(xright) <= 100 && abs(xright) < abs(rx)
> && hints.win_gravity != WestGravity))
> showright = 1;
> if (hints.win_gravity == SouthGravity ||
> (abs(ybelow) <= 100 && abs(ybelow) < abs(ry)
> && hints.win_gravity != NorthGravity))
> showbelow = 1;
>
> if (showright)
> printf("-%d", xright);
> else
> printf("+%d", rx);
> if (showbelow)
> printf("-%d", ybelow);
> else
> printf("+%d", ry);
> printf("\n");
> }
>
>
> /*
> * Display bits info:
> */
> static const binding _gravities[] = {
> { UnmapGravity, "UnMapGravity" }, /* WARNING: both of these have*/
> { ForgetGravity, "ForgetGravity" }, /* the same value - see code */
> { NorthWestGravity, "NorthWestGravity" },
> { NorthGravity, "NorthGravity" },
> { NorthEastGravity, "NorthEastGravity" },
> { WestGravity, "WestGravity" },
> { CenterGravity, "CenterGravity" },
> { EastGravity, "EastGravity" },
> { SouthWestGravity, "SouthWestGravity" },
> { SouthGravity, "SouthGravity" },
> { SouthEastGravity, "SouthEastGravity" },
> { StaticGravity, "StaticGravity" },
> { 0, 0 } };
>
> static const binding _backing_store_hint[] = {
> { NotUseful, "NotUseful" },
> { WhenMapped, "WhenMapped" },
> { Always, "Always" },
> { 0, 0 } };
>
> static const binding _bool[] = {
> { 0, "No" },
> { 1, "Yes" },
> { 0, 0 } };
>
> static void
> Display_Bits_Info(Window window)
> {
> XWindowAttributes win_attributes;
>
> if (!XGetWindowAttributes(dpy, window, &win_attributes))
> Fatal_Error("Can't get window attributes.");
>
> printf("\n");
> printf(" Bit gravity: %s\n",
> Lookup(win_attributes.bit_gravity, _gravities+1));
> printf(" Window gravity: %s\n",
> Lookup(win_attributes.win_gravity, _gravities));
> printf(" Backing-store hint: %s\n",
> Lookup(win_attributes.backing_store, _backing_store_hint));
> printf(" Backing-planes to be preserved: 0x%lx\n",
> win_attributes.backing_planes);
> printf(" Backing pixel: %ld\n", win_attributes.backing_pixel);
> printf(" Save-unders: %s\n",
> Lookup(win_attributes.save_under, _bool));
> }
>
>
> /*
> * Routine to display all events in an event mask
> */
> static const binding _event_mask_names[] = {
> { KeyPressMask, "KeyPress" },
> { KeyReleaseMask, "KeyRelease" },
> { ButtonPressMask, "ButtonPress" },
> { ButtonReleaseMask, "ButtonRelease" },
> { EnterWindowMask, "EnterWindow" },
> { LeaveWindowMask, "LeaveWindow" },
> { PointerMotionMask, "PointerMotion" },
> { PointerMotionHintMask, "PointerMotionHint" },
> { Button1MotionMask, "Button1Motion" },
> { Button2MotionMask, "Button2Motion" },
> { Button3MotionMask, "Button3Motion" },
> { Button4MotionMask, "Button4Motion" },
> { Button5MotionMask, "Button5Motion" },
> { ButtonMotionMask, "ButtonMotion" },
> { KeymapStateMask, "KeymapState" },
> { ExposureMask, "Exposure" },
> { VisibilityChangeMask, "VisibilityChange" },
> { StructureNotifyMask, "StructureNotify" },
> { ResizeRedirectMask, "ResizeRedirect" },
> { SubstructureNotifyMask, "SubstructureNotify" },
> { SubstructureRedirectMask, "SubstructureRedirect" },
> { FocusChangeMask, "FocusChange" },
> { PropertyChangeMask, "PropertyChange" },
> { ColormapChangeMask, "ColormapChange" },
> { OwnerGrabButtonMask, "OwnerGrabButton" },
> { 0, 0 } };
>
> static void
> Display_Event_Mask(long mask)
> {
> long bit, bit_mask;
>
> for (bit=0, bit_mask=1; bit<sizeof(long)*8; bit++, bit_mask <<= 1)
> if (mask & bit_mask)
> printf(" %s\n",
> LookupL(bit_mask, _event_mask_names));
> }
>
>
> /*
> * Display info on events
> */
> static void
> Display_Events_Info(Window window)
> {
> XWindowAttributes win_attributes;
>
> if (!XGetWindowAttributes(dpy, window, &win_attributes))
> Fatal_Error("Can't get window attributes.");
>
> printf("\n");
> printf(" Someone wants these events:\n");
> Display_Event_Mask(win_attributes.all_event_masks);
>
> printf(" Do not propagate these events:\n");
> Display_Event_Mask(win_attributes.do_not_propagate_mask);
>
> printf(" Override redirection?: %s\n",
> Lookup(win_attributes.override_redirect, _bool));
> }
>
>
> /* left out visual stuff */
> /* left out colormap */
> /* left out map_installed */
>
>
> /*
> * Display root, parent, and (recursively) children information
> * recurse - true to show children information
> */
> static void
> Display_Tree_Info(Window window, int recurse)
> {
> display_tree_info_1(window, recurse, 0);
> }
>
> /*
> * level - recursion level
> */
> static void
> display_tree_info_1(Window window, int recurse, int level)
> {
> int i, j;
> int rel_x, rel_y, abs_x, abs_y;
> unsigned int width, height, border, depth;
> Window root_win, parent_win;
> unsigned int num_children;
> Window *child_list;
> XClassHint classhint;
>
> if (!XQueryTree(dpy, window, &root_win, &parent_win, &child_list,
> &num_children))
> Fatal_Error("Can't query window tree.");
>
> if (level == 0) {
> printf("\n");
> printf(" Root window id: ");
> Display_Window_Id(root_win, True);
> printf(" Parent window id: ");
> Display_Window_Id(parent_win, True);
> }
>
> if (level == 0 || num_children > 0) {
> printf(" ");
> for (j=0; j<level; j++) printf(" ");
> printf("%d child%s%s\n", num_children, num_children == 1 ? "" : "ren",
> num_children ? ":" : ".");
> }
>
> for (i = (int)num_children - 1; i >= 0; i--) {
> printf(" ");
> for (j=0; j<level; j++) printf(" ");
> Display_Window_Id(child_list[i], False);
> printf(": (");
> if(XGetClassHint(dpy, child_list[i], &classhint)) {
> if(classhint.res_name) {
> printf("\"%s\" ", classhint.res_name);
> XFree(classhint.res_name);
> } else
> printf("(none) ");
> if(classhint.res_class) {
> printf("\"%s\") ", classhint.res_class);
> XFree(classhint.res_class);
> } else
> printf("(none)) ");
> } else
> printf(") ");
>
> if (XGetGeometry(dpy, child_list[i], &root_win,
> &rel_x, &rel_y, &width, &height, &border, &depth)) {
> Window child;
>
> printf (" %ux%u+%d+%d", width, height, rel_x, rel_y);
> if (XTranslateCoordinates (dpy, child_list[i], root_win,
> 0 ,0, &abs_x, &abs_y, &child)) {
> printf (" +%d+%d", abs_x - border, abs_y - border);
> }
> }
> printf("\n");
>
> if (recurse)
> display_tree_info_1(child_list[i], 1, level+1);
> }
>
> if (child_list) XFree((char *)child_list);
> }
>
>
> /*
> * Display a set of size hints
> */
> static void
> Display_Hints(XSizeHints *hints)
> {
> long flags;
>
> flags = hints->flags;
>
> if (flags & USPosition)
> printf(" User supplied location: %s, %s\n",
> xscale(hints->x), yscale(hints->y));
>
> if (flags & PPosition)
> printf(" Program supplied location: %s, %s\n",
> xscale(hints->x), yscale(hints->y));
>
> if (flags & USSize) {
> printf(" User supplied size: %s by %s\n",
> xscale(hints->width), yscale(hints->height));
> }
>
> if (flags & PSize)
> printf(" Program supplied size: %s by %s\n",
> xscale(hints->width), yscale(hints->height));
>
> if (flags & PMinSize)
> printf(" Program supplied minimum size: %s by %s\n",
> xscale(hints->min_width), yscale(hints->min_height));
>
> if (flags & PMaxSize)
> printf(" Program supplied maximum size: %s by %s\n",
> xscale(hints->max_width), yscale(hints->max_height));
>
> if (flags & PBaseSize) {
> printf(" Program supplied base size: %s by %s\n",
> xscale(hints->base_width), yscale(hints->base_height));
> }
>
> if (flags & PResizeInc) {
> printf(" Program supplied x resize increment: %s\n",
> xscale(hints->width_inc));
> printf(" Program supplied y resize increment: %s\n",
> yscale(hints->height_inc));
> if (hints->width_inc != 0 && hints->height_inc != 0) {
> if (flags & USSize)
> printf(" User supplied size in resize increments: %s by %s\n",
> (xscale(hints->width / hints->width_inc)),
> (yscale(hints->height / hints->height_inc)));
> if (flags & PSize)
> printf(" Program supplied size in resize increments: %s by %s\n",
> (xscale(hints->width / hints->width_inc)),
> (yscale(hints->height / hints->height_inc)));
> if (flags & PMinSize)
> printf(" Program supplied minimum size in resize increments: %s by %s\n",
> xscale(hints->min_width / hints->width_inc), yscale(hints->min_height / hints->height_inc));
> if (flags & PBaseSize)
> printf(" Program supplied base size in resize increments: %s by %s\n",
> (xscale(hints->base_width / hints->width_inc)),
> (yscale(hints->base_height / hints->height_inc)));
> }
> }
>
> if (flags & PAspect) {
> printf(" Program supplied min aspect ratio: %s/%s\n",
> xscale(hints->min_aspect.x), yscale(hints->min_aspect.y));
> printf(" Program supplied max aspect ratio: %s/%s\n",
> xscale(hints->max_aspect.x), yscale(hints->max_aspect.y));
> }
>
> if (flags & PWinGravity) {
> printf(" Program supplied window gravity: %s\n",
> Lookup(hints->win_gravity, _gravities));
> }
> }
>
>
> /*
> * Display Size Hints info
> */
> static void
> Display_Size_Hints(Window window)
> {
> XSizeHints *hints = XAllocSizeHints();
> long supplied;
>
> printf("\n");
> if (!XGetWMNormalHints(dpy, window, hints, &supplied))
> printf(" No normal window size hints defined\n");
> else {
> printf(" Normal window size hints:\n");
> hints->flags &= supplied;
> Display_Hints(hints);
> }
>
> if (!XGetWMSizeHints(dpy, window, hints, &supplied, XA_WM_ZOOM_HINTS))
> printf(" No zoom window size hints defined\n");
> else {
> printf(" Zoom window size hints:\n");
> hints->flags &= supplied;
> Display_Hints(hints);
> }
> XFree((char *)hints);
> }
>
>
> static void
> Display_Window_Shape (Window window)
> {
> Bool ws, bs;
> int xws, yws, xbs, ybs;
> unsigned int wws, hws, wbs, hbs;
>
> if (!XShapeQueryExtension (dpy, &bs, &ws))
> return;
>
> printf("\n");
> XShapeQueryExtents (dpy, window, &ws, &xws, &yws, &wws, &hws,
> &bs, &xbs, &ybs, &wbs, &hbs);
> if (!ws)
> printf(" No window shape defined\n");
> else {
> printf(" Window shape extents: %sx%s",
> xscale(wws), yscale(hws));
> printf("+%s+%s\n", xscale(xws), yscale(yws));
> }
> if (!bs)
> printf(" No border shape defined\n");
> else {
> printf(" Border shape extents: %sx%s",
> xscale(wbs), yscale(hbs));
> printf("+%s+%s\n", xscale(xbs), yscale(ybs));
> }
> }
>
> /*
> * Display Window Manager Info
> */
> static const binding _state_hints[] = {
> { DontCareState, "Don't Care State" },
> { NormalState, "Normal State" },
> { ZoomState, "Zoomed State" },
> { IconicState, "Iconic State" },
> { InactiveState, "Inactive State" },
> { 0, 0 } };
>
> static void
> Display_WM_Info(Window window)
> {
> XWMHints *wmhints;
> long flags;
>
> wmhints = XGetWMHints(dpy, window);
> printf("\n");
> if (!wmhints) {
> printf(" No window manager hints defined\n");
> return;
> }
> flags = wmhints->flags;
>
> printf(" Window manager hints:\n");
>
> if (flags & InputHint)
> printf(" Client accepts input or input focus: %s\n",
> Lookup(wmhints->input, _bool));
>
> if (flags & IconWindowHint) {
> printf(" Icon window id: ");
> Display_Window_Id(wmhints->icon_window, True);
> }
>
> if (flags & IconPositionHint)
> printf(" Initial icon position: %s, %s\n",
> xscale(wmhints->icon_x), yscale(wmhints->icon_y));
>
> if (flags & StateHint)
> printf(" Initial state is %s\n",
> Lookup(wmhints->initial_state, _state_hints));
>
> XFree(wmhints);
> }
--
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
Download attachment "capture-xwinsched.png" of type "image/png" (126377 bytes)
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