77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
// Copyright 2021 The golang.design Initiative Authors.
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// All rights reserved. Use of this source code is governed
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// by a MIT license that can be found in the LICENSE file.
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//
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// Written by Changkun Ou <changkun.de>
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//go:build linux
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#include <stdint.h>
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#include <stdio.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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extern void hotkeyDown(uintptr_t hkhandle);
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extern void hotkeyUp(uintptr_t hkhandle);
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int displayTest() {
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Display* d = NULL;
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for (int i = 0; i < 42; i++) {
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d = XOpenDisplay(0);
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if (d == NULL) continue;
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break;
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}
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if (d == NULL) {
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return -1;
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}
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return 0;
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}
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// FIXME: handle bad access properly.
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// int handleErrors( Display* dpy, XErrorEvent* pErr )
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// {
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// printf("X Error Handler called, values: %d/%lu/%d/%d/%d\n",
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// pErr->type,
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// pErr->serial,
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// pErr->error_code,
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// pErr->request_code,
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// pErr->minor_code );
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// if( pErr->request_code == 33 ){ // 33 (X_GrabKey)
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// if( pErr->error_code == BadAccess ){
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// printf("ERROR: key combination already grabbed by another client.\n");
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// return 0;
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// }
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// }
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// return 0;
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// }
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// waitHotkey blocks until the hotkey is triggered.
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// this function crashes the program if the hotkey already grabbed by others.
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int waitHotkey(uintptr_t hkhandle, unsigned int mod, int key) {
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Display* d = NULL;
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for (int i = 0; i < 42; i++) {
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d = XOpenDisplay(0);
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if (d == NULL) continue;
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break;
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}
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if (d == NULL) {
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return -1;
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}
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int keycode = XKeysymToKeycode(d, key);
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XGrabKey(d, keycode, mod, DefaultRootWindow(d), False, GrabModeAsync, GrabModeAsync);
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XSelectInput(d, DefaultRootWindow(d), KeyPressMask);
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XEvent ev;
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while(1) {
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XNextEvent(d, &ev);
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switch(ev.type) {
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case KeyPress:
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hotkeyDown(hkhandle);
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continue;
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case KeyRelease:
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hotkeyUp(hkhandle);
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XUngrabKey(d, keycode, mod, DefaultRootWindow(d));
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XCloseDisplay(d);
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return 0;
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}
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}
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} |