/** Execute several navigation event on the current stack */
public void chain(NavigationChain chain, ViewTransitionDirection direction) {
check();
Preconditions.checkArgument(
chain != null && !chain.chains.isEmpty(), "Navigation chain cannot be null nor empty");
ViewTransitionDirection defaultDirection = null;
List<History.Entry> entries = new ArrayList<>(chain.chains.size());
for (int i = 0; i < chain.chains.size(); i++) {
NavigationChain.Chain c = chain.chains.get(i);
if (c.path == null) {
defaultDirection = ViewTransitionDirection.BACKWARD;
if (history.canKill()) {
if (c.type == NavigationChain.Chain.TYPE_BACK) {
entries.add(history.kill());
} else {
entries.addAll(history.killAll(false));
}
}
} else {
defaultDirection = ViewTransitionDirection.FORWARD;
if (c.type == NavigationChain.Chain.TYPE_REPLACE) {
History.Entry e = history.kill();
if (history.indexOf(e) != 0) {
entries.add(e);
}
}
// push type for push and replace, modal for show
int type =
c.type == NavigationChain.Chain.TYPE_PUSH
|| c.type == NavigationChain.Chain.TYPE_REPLACE
? History.NAV_TYPE_PUSH
: History.NAV_TYPE_MODAL;
entries.add(history.add(c.path, type));
}
}
entries.get(entries.size() - 1).direction = direction != null ? direction : defaultDirection;
entries.get(0).returnsResult = chain.result;
dispatcher.dispatch(entries);
}
