mirror of https://github.com/9wm/xss.git
fix xkeygrab latency bug, finally
This commit is contained in:
Neale Pickett
parent
92bb54aaa2
commit
ebea23e5c0
236
xkeygrab.c
236
xkeygrab.c
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@ -1,10 +1,11 @@
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/* xkeygrab -- grab keyboard and mouse, writing typed lines to stdout
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* Copyright (C) 2008 Neale Pickett <neale@woozle.org>
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/*
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* xkeygrab -- grab keyboard and mouse, writing typed lines to stdout
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* Copyright (C) 2008 Neale Pickett <neale@woozle.org>
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*
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* This program 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 (at
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* your option) any later version.
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* This program is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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@ -12,7 +13,7 @@
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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@ -28,104 +29,135 @@
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int
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main(int argc, char *argv[])
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{
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Display *display = NULL;
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Display *display = NULL;
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if (argc != 1) {
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(void)fprintf(stderr, "Usage: %s\n", argv[0]);
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return 64; /* EX_USAGE */
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}
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try {
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Window root;
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char obuf[4096];
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int obuflen = 0;
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struct pollfd fds[2];
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if (! (display = XOpenDisplay(NULL))) raise("cannot open display");
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root = DefaultRootWindow(display);
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fds[0].fd = STDOUT_FILENO;
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fds[0].events = 0;
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fds[1].fd = ConnectionNumber(display);
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fds[1].events = POLLIN;
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while (1) {
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int tograb = 3;
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int ret;
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if (tograb) {
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if ((tograb & 1) && (GrabSuccess == XGrabKeyboard(display, root,
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True,
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GrabModeAsync, GrabModeAsync,
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CurrentTime))) {
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tograb |= 1;
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}
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if ((tograb & 2) && (GrabSuccess == XGrabPointer(display, root,
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False, ButtonPressMask | ButtonReleaseMask | PointerMotionMask,
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GrabModeAsync, GrabModeAsync,
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None, None, CurrentTime))) {
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tograb |= 2;
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}
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}
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ret = poll(fds, 2, (tograb?100:-1));
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if (fds[0].revents & POLLERR) {
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break;
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}
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if (fds[1].revents & POLLIN) {
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XEvent event;
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(void)XNextEvent(display, &event);
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if (KeyPress == event.type) {
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char buf[32];
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KeySym ksym;
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int i;
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if (obuflen == sizeof(obuf)) continue;
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i = XLookupString(&event.xkey, buf, sizeof(buf), &ksym, NULL);
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switch (ksym) {
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case XK_Return:
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if (obuflen) {
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(void)write(STDOUT_FILENO, obuf, obuflen);
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(void)write(STDOUT_FILENO, "\n", 1);
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obuflen = 0;
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}
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break;
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case XK_BackSpace:
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if (obuflen) obuflen -= 1;
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break;
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default:
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if (1 == i) {
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switch (buf[0]) {
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case '\025':
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obuflen = 0;
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break;
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case ' ' ... '~':
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obuf[obuflen++] = buf[0];
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break;
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}
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}
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break;
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}
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if (obuflen == sizeof(obuf)) {
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(void)write(STDOUT_FILENO, obuf, obuflen);
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obuflen = 0;
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}
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}
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}
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if (argc != 1) {
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(void) fprintf(stderr, "Usage: %s\n", argv[0]);
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return 64; /* EX_USAGE */
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}
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} while (0);
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if (display) {
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(void)XUngrabKeyboard(display, CurrentTime);
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(void)XUngrabPointer(display, CurrentTime);
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(void)XCloseDisplay(display);
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}
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try {
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Window root;
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char obuf[4096];
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int obuflen = 0;
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struct pollfd fds[2];
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except {
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(void)fprintf(stderr, "Error: %s\n", exception);
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return 69; /* EX_UNAVAILABLE */
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}
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if (!(display = XOpenDisplay(NULL)))
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raise("cannot open display");
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root = DefaultRootWindow(display);
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return 0;
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if (getenv("NOROOT")) {
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int screen = DefaultScreen(display);
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XSetWindowAttributes wa;
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zero(wa);
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wa.override_redirect = 1;
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wa.background_pixel = BlackPixel(display, screen);
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root = XCreateWindow(display, root,
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0, 0,
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50, 50, 0,
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CopyFromParent, CopyFromParent,
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CopyFromParent, CWBackPixel, &wa);
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XMapWindow(display, root);
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}
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fds[0].fd = STDOUT_FILENO;
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fds[0].events = 0;
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fds[1].fd = ConnectionNumber(display);
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fds[1].events = POLLIN;
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while (1) {
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int tograb = 3;
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int ret;
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if (tograb) {
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if ((tograb & 1)
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&& (GrabSuccess ==
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XGrabKeyboard(display, root, True, GrabModeAsync,
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GrabModeAsync, CurrentTime))) {
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tograb |= 1;
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}
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if ((tograb & 2)
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&& (GrabSuccess ==
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XGrabPointer(display, root, False,
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ButtonPressMask | ButtonReleaseMask |
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PointerMotionMask, GrabModeAsync,
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GrabModeAsync, None, None,
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CurrentTime))) {
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tograb |= 2;
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}
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}
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ret = poll(fds, 2, (tograb ? 100 : -1));
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if (-1 == ret)
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break;
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if (fds[0].revents & POLLERR) {
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break;
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}
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if (fds[1].revents & POLLIN) {
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XEvent event;
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do {
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(void) XNextEvent(display, &event);
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if (KeyPress == event.type) {
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char buf[32];
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KeySym ksym;
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int i;
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if (obuflen == sizeof(obuf))
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continue;
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i = XLookupString(&event.xkey, buf, sizeof(buf),
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&ksym, NULL);
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switch (ksym) {
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case XK_Return:
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if (obuflen) {
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(void) write(STDOUT_FILENO, obuf,
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obuflen);
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(void) write(STDOUT_FILENO, "\n", 1);
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obuflen = 0;
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}
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break;
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case XK_BackSpace:
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if (obuflen)
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obuflen -= 1;
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break;
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default:
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if (1 == i) {
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switch (buf[0]) {
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case '\025':
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obuflen = 0;
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break;
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case ' ' ... '~':
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obuf[obuflen++] = buf[0];
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break;
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}
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}
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break;
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}
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if (obuflen == sizeof(obuf)) {
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(void) write(STDOUT_FILENO, obuf, obuflen);
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obuflen = 0;
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}
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}
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} while (XPending(display));
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}
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}
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}
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while (0);
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if (display) {
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(void) XUngrabKeyboard(display, CurrentTime);
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(void) XUngrabPointer(display, CurrentTime);
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(void) XCloseDisplay(display);
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}
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except {
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(void) fprintf(stderr, "Error: %s\n", exception);
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return 69; /* EX_UNAVAILABLE */
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}
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return 0;
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}
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