// Executes a node. Use this in a for-each construct; each time you iterate over it,
// you'll get a line, command, or set of options.
public IEnumerable<Yarn.Dialogue.RunnerResult> Run(string startNode = DEFAULT_START)
{
if (LogDebugMessage == null) {
throw new YarnException ("LogDebugMessage must be set before running");
}
if (LogErrorMessage == null) {
throw new YarnException ("LogErrorMessage must be set before running");
}
if (program == null) {
LogErrorMessage ("Dialogue.Run was called, but no program was loaded. Stopping.");
yield break;
}
vm = new VirtualMachine (this, program);
RunnerResult latestResult;
vm.lineHandler = delegate(LineResult result) {
latestResult = result;
};
vm.commandHandler = delegate(CommandResult result) {
// Is it the special custom command "<<stop>>"?
if (result is CommandResult && (result as CommandResult).command.text == "stop") {
vm.Stop();
}
latestResult = result;
};
vm.nodeCompleteHandler = delegate(NodeCompleteResult result) {
visitedNodeNames.Add (vm.currentNodeName);
latestResult = result;
};
vm.optionsHandler = delegate(OptionSetResult result) {
latestResult = result;
};
if (vm.SetNode (startNode) == false) {
yield break;
}
// Run until the program stops, pausing to yield important
// results
do {
latestResult = null;
vm.RunNext ();
if (latestResult != null)
yield return latestResult;
} while (vm.executionState != VirtualMachine.ExecutionState.Stopped);
}
