On shabbos, it is a biblical prohibition squeeze olives or grapes specifically for their juices, though one may squeeze them if the juices are used directly to enhance a solid food.
As an additional rabbinic safeguard, one may not benefit from olive/grape juice that ran from the fruits on shabbos. (SA OC 320:1,4)
Generally, fruits seep juices when they are cut. If one is planning to eat the grape/olive as food, is one allowed to cut the fruit if there is no other solid food on the plate? (If one is, is one allowed to use the juices that seeped out?)
Note: I am specifically asking according to the accepted halacha that squeezing olives/grapes onto food is permissible.
Traditional sources are preferred.