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#include "SwifTools/Idle/XSSIdleQuerier.h"

#include <cassert>
#include <iostream>

namespace Swift {

XSSIdleQuerier::XSSIdleQuerier() : display(NULL), info(NULL) {
	display = XOpenDisplay(NULL);
	assert(display);
	rootWindow = DefaultRootWindow(display);
	int event, error;
	available = XScreenSaverQueryExtension(display, &event, &error);
	if (available) {
		info = XScreenSaverAllocInfo();
	}
	else {
		std::cerr << "Warning: XScreenSaver extension not found. Idle time detection will not work." << std::endl;
	}
}

XSSIdleQuerier::~XSSIdleQuerier() {
	XFree(info);
}

int XSSIdleQuerier::getIdleTimeSeconds() {
	if (available) {
		XScreenSaverQueryInfo(display, rootWindow, info);
		return info->idle / 1000;
	}
	else {
		return 0;
	}
}

}