private IEnumerable <Dialogue.RunnerResult> RunShortcutOptionGroup(Parser.ShortcutOptionGroup shortcutOptionGroup)
{
var optionsToDisplay = new List <Parser.ShortcutOption> ();
// Determine which options to present
foreach (var option in shortcutOptionGroup.options)
{
var include = true;
if (option.condition != null)
{
include = EvaluateExpression(option.condition).AsBool != false;
}
if (include)
{
optionsToDisplay.Add(option);
}
}
if (optionsToDisplay.Count > 0)
{
// Give this list to our client
var optionStrings = new List <string> ();
foreach (var option in optionsToDisplay)
{
optionStrings.Add(option.label);
}
Parser.ShortcutOption selectedOption = null;
yield return(new Dialogue.OptionSetResult(optionStrings, delegate(int selectedOptionIndex) {
selectedOption = optionsToDisplay[selectedOptionIndex];
}));
if (selectedOption == null)
{
dialogue.LogErrorMessage("The OptionChooser I provided was not called before the " +
"next line was run! Stopping dialogue.");
yield break;
}
if (selectedOption.optionNode != null)
{
foreach (var command in RunStatements(selectedOption.optionNode.statements))
{
yield return(command);
}
}
}
// Done running these options; run the stuff that came afterwards
if (shortcutOptionGroup.epilogue != null)
{
foreach (var command in RunStatements(shortcutOptionGroup.epilogue.statements))
{
yield return(command);
}
}
}
void GenerateCode(Node node, Parser.ShortcutOptionGroup statement)
{
var endOfGroupLabel = RegisterLabel("group_end");
var labels = new List <string> ();
int optionCount = 0;
foreach (var shortcutOption in statement.options)
{
var optionDestinationLabel = RegisterLabel("option_" + (optionCount + 1));
labels.Add(optionDestinationLabel);
string endOfClauseLabel = null;
if (shortcutOption.condition != null)
{
endOfClauseLabel = RegisterLabel("conditional_" + optionCount);
GenerateCode(node, shortcutOption.condition);
Emit(node, ByteCode.JumpIfFalse, endOfClauseLabel);
}
var labelLineID = GetLineIDFromNodeTags(shortcutOption);
var labelStringID = program.RegisterString(shortcutOption.label, node.name, labelLineID, shortcutOption.lineNumber, true);
Emit(node, ByteCode.AddOption, labelStringID, optionDestinationLabel);
if (shortcutOption.condition != null)
{
Emit(node, ByteCode.Label, endOfClauseLabel);
Emit(node, ByteCode.Pop);
}
optionCount++;
}
Emit(node, ByteCode.ShowOptions);
if (flags.DisableShuffleOptionsAfterNextSet == true)
{
Emit(node, ByteCode.PushBool, false);
Emit(node, ByteCode.StoreVariable, VirtualMachine.SpecialVariables.ShuffleOptions);
Emit(node, ByteCode.Pop);
flags.DisableShuffleOptionsAfterNextSet = false;
}
Emit(node, ByteCode.Jump);
optionCount = 0;
foreach (var shortcutOption in statement.options)
{
Emit(node, ByteCode.Label, labels [optionCount]);
if (shortcutOption.optionNode != null)
{
GenerateCode(node, shortcutOption.optionNode.statements);
}
Emit(node, ByteCode.JumpTo, endOfGroupLabel);
optionCount++;
}
// reached the end of the option group
Emit(node, ByteCode.Label, endOfGroupLabel);
// clean up after the jump
Emit(node, ByteCode.Pop);
}
