// have entered the body
// the header should have finished being parsed and currentNode ready
// all we do is set up a body visitor and tell it to run through all the statements
// it handles everything from that point onwards
public override void EnterBody(YarnSpinnerParser.BodyContext context)
{
// if it is a regular node
if (!rawTextNode)
{
BodyVisitor visitor = new BodyVisitor(this);
foreach (var statement in context.statement())
{
visitor.Visit(statement);
}
}
// we are a rawText node
// turn the body into text
// save that into the node
// perform no compilation
// TODO: oh glob! there has to be a better way
else
{
// moving in by 4 from the end to cut off the ---/=== delimiters
// and their associated /n's
int start = context.Start.StartIndex + 4;
int end = context.Stop.StopIndex - 4;
string body = context.Start.InputStream.GetText(new Interval(start, end));
currentNode.sourceTextStringID = program.RegisterString(body, currentNode.name, "line:" + currentNode.name, context.Start.Line, true);
}
}
// have entered the body
// the header should have finished being parsed and currentNode ready
// all we do is set up a body visitor and tell it to run through all the statements
// it handles everything from that point onwards
public override void EnterBody(YarnSpinnerParser.BodyContext context)
{
// if it is a regular node
if (!RawTextNode)
{
// This is the start of a node that we can jump to. Add a label at this point.
CurrentNode.Labels.Add(RegisterLabel(), CurrentNode.Instructions.Count);
BodyVisitor visitor = new BodyVisitor(this);
foreach (var statement in context.statement())
{
visitor.Visit(statement);
}
}
// we are a rawText node
// turn the body into text
// save that into the node
// perform no compilation
// TODO: oh glob! there has to be a better way
else
{
CurrentNode.SourceTextStringID = RegisterString(context.GetText(), CurrentNode.Name, "line:" + CurrentNode.Name, context.Start.Line, null);
}
}
// exiting the body of the node, time for last minute work
// before moving onto the next node
// Does this node end after emitting AddOptions codes
// without calling ShowOptions?
public override void ExitBody(YarnSpinnerParser.BodyContext context)
{
// if it is a regular node
if (!rawTextNode)
{
// Note: this only works when we know that we don't have
// AddOptions and then Jump up back into the code to run them.
// TODO: A better solution would be for the parser to flag
// whether a node has Options at the end.
var hasRemainingOptions = false;
foreach (var instruction in currentNode.instructions)
{
if (instruction.operation == ByteCode.AddOption)
{
hasRemainingOptions = true;
}
if (instruction.operation == ByteCode.ShowOptions)
{
hasRemainingOptions = false;
}
}
// If this compiled node has no lingering options to show at the end of the node, then stop at the end
if (hasRemainingOptions == false)
{
Emit(currentNode, ByteCode.Stop);
}
else
{
// Otherwise, show the accumulated nodes and then jump to the selected node
Emit(currentNode, ByteCode.ShowOptions);
if (flags.DisableShuffleOptionsAfterNextSet == true)
{
Emit(currentNode, ByteCode.PushBool, false);
Emit(currentNode, ByteCode.StoreVariable, VirtualMachine.SpecialVariables.ShuffleOptions);
Emit(currentNode, ByteCode.Pop);
flags.DisableShuffleOptionsAfterNextSet = false;
}
Emit(currentNode, ByteCode.RunNode);
}
}
}
// have entered the body the header should have finished being
// parsed and currentNode ready all we do is set up a body visitor
// and tell it to run through all the statements it handles
// everything from that point onwards
public override void EnterBody(YarnSpinnerParser.BodyContext context)
{
// if it is a regular node
if (!RawTextNode)
{
// This is the start of a node that we can jump to. Add a
// label at this point.
CurrentNode.Labels.Add(RegisterLabel(), CurrentNode.Instructions.Count);
CodeGenerationVisitor visitor = new CodeGenerationVisitor(this);
foreach (var statement in context.statement())
{
visitor.Visit(statement);
}
}
// We are a rawText node. Don't compile it; instead, note the string
else
{
CurrentNode.SourceTextStringID = Compiler.GetLineIDForNodeName(CurrentNode.Name);
}
}
// exiting the body of the node, time for last minute work
// before moving onto the next node
// Does this node end after emitting AddOptions codes
// without calling ShowOptions?
public override void ExitBody(YarnSpinnerParser.BodyContext context)
{
// if it is a regular node
if (!RawTextNode)
{
// Note: this only works when we know that we don't have
// AddOptions and then Jump up back into the code to run them.
// TODO: A better solution would be for the parser to flag
// whether a node has Options at the end.
var hasRemainingOptions = false;
foreach (var instruction in CurrentNode.Instructions)
{
if (instruction.Opcode == OpCode.AddOption)
{
hasRemainingOptions = true;
}
if (instruction.Opcode == OpCode.ShowOptions)
{
hasRemainingOptions = false;
}
}
// If this compiled node has no lingering options to show at the end of the node, then stop at the end
if (hasRemainingOptions == false)
{
Emit(CurrentNode, OpCode.Stop);
}
else
{
// Otherwise, show the accumulated nodes and then jump to the selected node
Emit(CurrentNode, OpCode.ShowOptions);
// Showing options will make the execution stop; the
// user will have invoked code that pushes the name of
// a node onto the stack, which RunNode handles
Emit(CurrentNode, OpCode.RunNode);
}
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="YarnSpinnerParser.body"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitBody([NotNull] YarnSpinnerParser.BodyContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="YarnSpinnerParser.body"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitBody([NotNull] YarnSpinnerParser.BodyContext context)
{
}
