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package ui;
/**
* Represents a screen
*/
public interface UIHandler {
/**
* EFFECTS: Called when the screen is switched to.
*/
default void enter(Object... args) {
}
/**
* EFFECTS: Show objects. command() will not be called.
*/
void show();
/**
* EFFECTS: Commit changes and exit. command() will not be called.
*/
default void commit() {
}
/**
* EFFECTS: Discard changes and exit. command() will not be called. Returns the next screen.
*/
Screen exit();
/**
* EFFECTS: Run help. command() will not be called.
*/
void help();
/**
* EFFECTS: Any commands rather than commit / exit / help.
* REQUIRES: args != null && args.length >= 1
*/
void command(String... args);
/**
* EFFECTS: Return the current PS1 prompt.
*/
String getPS1();
}
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