Bool rfbShouldSendNewPosition(rfbClientPtr cl) {
if (!cl->enableCursorPosUpdates)
return FALSE;
else {
return (!CGPointEqualToPoint(cl->clientCursorLocation,currentCursorLoc()));
}
}
CGPoint CGLineIntersectsRectAtPoint(CGRect rect, CGLine line)
{
CGLine top = CGLineMake( CGPointMake( CGRectGetMinX(rect), CGRectGetMinY(rect) ), CGPointMake( CGRectGetMaxX(rect), CGRectGetMinY(rect) ) );
CGLine right = CGLineMake( CGPointMake( CGRectGetMaxX(rect), CGRectGetMinY(rect) ), CGPointMake( CGRectGetMaxX(rect), CGRectGetMaxY(rect) ) );
CGLine bottom = CGLineMake( CGPointMake( CGRectGetMinX(rect), CGRectGetMaxY(rect) ), CGPointMake( CGRectGetMaxX(rect), CGRectGetMaxY(rect) ) );
CGLine left = CGLineMake( CGPointMake( CGRectGetMinX(rect), CGRectGetMinY(rect) ), CGPointMake( CGRectGetMinX(rect), CGRectGetMaxY(rect) ) );
// ensure the line extends beyond outside the rectangle
CGFloat topLeftToBottomRight = CGPointDistance(CGRectTopLeftPoint(rect), CGRectBottomRightPoint(rect));
CGFloat bottomLeftToTopRight = CGPointDistance(CGRectBottomLeftPoint(rect), CGRectTopRightPoint(rect));
CGFloat maxDimension = MT_MAX(topLeftToBottomRight, bottomLeftToTopRight);
CGFloat scaleFactor = maxDimension / MT_MIN(CGLineLength(line), maxDimension);
CGLine extendedLine = CGLineScale(line, scaleFactor + 3);
CGPoint points[4] = { CGLinesIntersectAtPoint(top, extendedLine), CGLinesIntersectAtPoint(right, extendedLine), CGLinesIntersectAtPoint(bottom, extendedLine), CGLinesIntersectAtPoint(left, extendedLine) };
for (int i = 0; i < 4; i++) {
CGPoint p = points[i];
if (!CGPointEqualToPoint(p, NULL_POINT)) {
return p;
}
}
return NULL_POINT;
}
// We call this to see if we have a new cursor and should notify clients to do an update
// Or if cursor has moved
void rfbCheckForCursorChange() {
CGPoint cursorLoc = currentCursorLoc();
//rfbLog("Check For Cursor Change");
// First Let's see if we have new info on the pasteboard - if so we'll send an update to each client
if (lastCursorSeed != CGSCurrentCursorSeed() || !CGPointEqualToPoint(lastCursorPosition, cursorLoc)) {
rfbClientIteratorPtr iterator = rfbGetClientIterator();
rfbClientPtr cl;
// Record first in case another change occurs after notifying clients
lastCursorSeed = CGSCurrentCursorSeed();
lastCursorPosition = cursorLoc;
// Notify each client
while ((cl = rfbClientIteratorNext(iterator)) != NULL) {
if (rfbShouldSendNewCursor(cl) || (rfbShouldSendNewPosition(cl)))
pthread_cond_signal(&cl->updateCond);
}
rfbReleaseClientIterator(iterator);
}
}
bool CGLineEqualToLine(CGLine line1, CGLine line2)
{
return CGPointEqualToPoint(line1.point1, line2.point1) && CGPointEqualToPoint(line1.point2, line2.point2);
}
bool CGCircleEqualToCircle(CGCircle circle1, CGCircle circle2)
{
return circle1.radius == circle2.radius && CGPointEqualToPoint(circle1.center, circle2.center);
}
