dockapps/libdockapp/src/daevent.c

/*
 * Copyright (c) 1999-2005 Alfredo K. Kojima, Alban Hertroys
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * 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
 * AUTHOR 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.

 */

#include <sys/types.h>
#include <sys/time.h>
#include <unistd.h>
#include <string.h>

#include "dockapp.h"
#include "daargs.h"
#include "dautil.h"

extern struct DAContext *_daContext;
extern Atom WM_DELETE_WINDOW;

Bool
DAProcessEvent(XEvent *event)
{
	if (event->xany.window == DAWindow)
		return DAProcessEventForWindow(DAWindow, event);
	else if (event->xany.window == DALeader)
		/* XXX: Is this superfluous now that DAWindow always references the
		 * dockapp window?
		 */
		return DAProcessEventForWindow(DALeader, event);
	else
		/* XXX: What about handling events for child windows? */
		return False;
}

Bool
DAProcessEventForWindow(Window window, XEvent *event)
{
	if (event->xany.window != window)
		return False;

	switch (event->type) {
	case ClientMessage:
		if (event->xclient.data.l[0] != WM_DELETE_WINDOW)
			break;
	/* fallthrough */
	case DestroyNotify:
		if (_daContext->callbacks.destroy)
			(*_daContext->callbacks.destroy)();

		DAFreeContext();
		XCloseDisplay(DADisplay);
#ifdef DEBUG
		debug("%s: DestroyNotify\n", _daContext->programName);
#endif

		exit(0);
		break;
	case ButtonPress:
		if (_daContext->callbacks.buttonPress)
			(*_daContext->callbacks.buttonPress)(event->xbutton.button,
							     event->xbutton.state,
							     event->xbutton.x,
							     event->xbutton.y);
		break;
	case ButtonRelease:
		if (_daContext->callbacks.buttonRelease)
			(*_daContext->callbacks.buttonRelease)(event->xbutton.button,
							       event->xbutton.state,
							       event->xbutton.x,
							       event->xbutton.y);
		break;
	case MotionNotify:
		if (_daContext->callbacks.motion)
			(*_daContext->callbacks.motion)(event->xmotion.x,
							event->xmotion.y);
		break;
	case EnterNotify:
		if (_daContext->callbacks.enter)
			(*_daContext->callbacks.enter)();
		break;
	case LeaveNotify:
		if (_daContext->callbacks.leave)
			(*_daContext->callbacks.leave)();
		break;
	default:
		return False;
	}

	return True;
}

void
DAEventLoop(void)
{
	DAEventLoopForWindow(DAWindow);
}

void
DAEventLoopForWindow(Window window)
{
	XEvent event;

	for (;; ) {
		if (_daContext->timeOut >= 0) {
			if (!DANextEventOrTimeout(&event, _daContext->timeOut)) {
				if (_daContext->callbacks.timeout)
					(*_daContext->callbacks.timeout)();
				continue;
			}
		} else
			XNextEvent(DADisplay, &event);

		DAProcessEventForWindow(window, &event);
	}
}

Bool
DANextEventOrTimeout(XEvent *event, unsigned long milliseconds)
{
	struct timeval timeout;
	fd_set rset;

	XSync(DADisplay, False);
	if (XPending(DADisplay)) {
		XNextEvent(DADisplay, event);
		return True;
	}

	timeout.tv_sec = milliseconds / 1000;
	timeout.tv_usec = (milliseconds % 1000) * 1000;

	FD_ZERO(&rset);
	FD_SET(ConnectionNumber(DADisplay), &rset);

	if (select(ConnectionNumber(DADisplay)+1, &rset, NULL, NULL, &timeout) > 0) {
		XNextEvent(DADisplay, event);
		return True;
	}

	return False;
}