// a regular ol' line of text
public override int VisitLine_statement(YarnSpinnerParser.Line_statementContext context)
{
// TODO: add support for line conditions:
//
// Mae: here's a line <<if true>>
//
// is identical to
//
// <<if true>>
// Mae: here's a line
// <<endif>>
// Convert the formatted string into a string with
// placeholders, and evaluate the inline expressions and push
// the results onto the stack.
GenerateFormattedText(context.line_formatted_text().children, out var composedString, out var expressionCount);
// Get the lineID for this string from the hashtags if it has one; otherwise, a new one will be created
string lineID = compiler.GetLineID(context.hashtag());
var hashtagText = GetHashtagTexts(context.hashtag());
int lineNumber = context.Start.Line;
string stringID = compiler.RegisterString(
composedString.ToString(),
compiler.CurrentNode.Name,
lineID,
lineNumber,
hashtagText);
compiler.Emit(OpCode.RunLine, new Operand(stringID), new Operand(expressionCount));
return(0);
}
// a regular ol' line of text
public override int VisitLine_statement(YarnSpinnerParser.Line_statementContext context)
{
// TODO: add support for line conditions:
//
// Mae: here's a line <<if true>>
//
// is identical to
//
// <<if true>> Mae: here's a line <<endif>>
// Evaluate the inline expressions and push the results onto
// the stack.
var expressionCount = GenerateCodeForExpressionsInFormattedText(context.line_formatted_text().children);
// Get the lineID for this string from the hashtags
string lineID = Compiler.GetLineID(context.hashtag());
if (lineID == null)
{
throw new ParseException("No line ID specified");
}
compiler.Emit(OpCode.RunLine, new Operand(lineID), new Operand(expressionCount));
return(0);
}
public override int VisitLine_statement([NotNull] YarnSpinnerParser.Line_statementContext context)
{
int lineNumber = context.Start.Line;
string lineID = Compiler.GetLineID(context.hashtag());
var hashtagText = GetHashtagTexts(context.hashtag());
GenerateFormattedText(context.line_formatted_text().children, out var composedString, out var expressionCount);
string stringID = stringTableManager.RegisterString(
composedString.ToString(),
fileName,
currentNodeName,
lineID,
lineNumber,
hashtagText);
if (lineID == null)
{
var hashtag = new YarnSpinnerParser.HashtagContext(context, 0);
hashtag.text = new CommonToken(YarnSpinnerLexer.HASHTAG_TEXT, stringID);
context.AddChild(hashtag);
}
return(0);
}
// a regular ol' line of text
public override int VisitLine_statement(YarnSpinnerParser.Line_statementContext context)
{
// grabbing the line of text and stripping off any "'s if they had them
string lineText = context.text().GetText().Trim('"');
// getting the lineID from the hashtags if it has one
string lineID = compiler.GetLineID(context.hashtag_block());
// technically this only gets the line the statement started on
int lineNumber = context.Start.Line;
string stringID = compiler.RegisterString(lineText, compiler.currentNode.Name, lineID, lineNumber);
compiler.Emit(OpCode.RunLine, new Operand(stringID));
return(0);
}
// for the shortcut options (-> line of text <<if expression>>
// indent statements dedent)+
public override int VisitShortcut_option_statement(YarnSpinnerParser.Shortcut_option_statementContext context)
{
string endOfGroupLabel = compiler.RegisterLabel("group_end");
var labels = new List <string>();
int optionCount = 0;
// For each option, create an internal destination label that,
// if the user selects the option, control flow jumps to. Then,
// evaluate its associated line_statement, and use that as the
// option text. Finally, add this option to the list of
// upcoming options.
foreach (var shortcut in context.shortcut_option())
{
// Generate the name of internal label that we'll jump to
// if this option is selected. We'll emit the label itself
// later.
string optionDestinationLabel = compiler.RegisterLabel($"shortcutoption_{compiler.CurrentNode.Name ?? "node"}_{optionCount + 1}");
labels.Add(optionDestinationLabel);
// This line statement may have a condition on it. If it
// does, emit code that evaluates the condition, and add a
// flag on the 'Add Option' instruction that indicates that
// a condition exists.
bool hasLineCondition = false;
if (shortcut.line_statement().line_condition() != null)
{
// Evaluate the condition, and leave it on the stack
Visit(shortcut.line_statement().line_condition().expression());
hasLineCondition = true;
}
// We can now prepare and add the option.
// Start by figuring out the text that we want to add. This
// will involve evaluating any inline expressions.
var expressionCount = GenerateCodeForExpressionsInFormattedText(shortcut.line_statement().line_formatted_text().children);
// Get the line ID from the hashtags if it has one
string lineID = Compiler.GetLineID(shortcut.line_statement().hashtag());
if (lineID == null)
{
throw new ParseException("No line ID provided");
}
// And add this option to the list.
compiler.Emit(
OpCode.AddOption,
new Operand(lineID),
new Operand(optionDestinationLabel),
new Operand(expressionCount),
new Operand(hasLineCondition));
optionCount++;
}
// All of the options that we intend to show are now ready to
// go.
compiler.Emit(OpCode.ShowOptions);
// The top of the stack now contains the name of the label we
// want to jump to. Jump to it now.
compiler.Emit(OpCode.Jump);
// We'll now emit the labels and code associated with each
// option.
optionCount = 0;
foreach (var shortcut in context.shortcut_option())
{
// Emit the label for this option's code
compiler.CurrentNode.Labels.Add(labels[optionCount], compiler.CurrentNode.Instructions.Count);
// Run through all the children statements of the shortcut
// option.
foreach (var child in shortcut.statement())
{
Visit(child);
}
// Jump to the end of this shortcut option group.
compiler.Emit(OpCode.JumpTo, new Operand(endOfGroupLabel));
optionCount++;
}
// We made it to the end! Mark the end of the group, so we can
// jump to it.
compiler.CurrentNode.Labels.Add(endOfGroupLabel, compiler.CurrentNode.Instructions.Count);
compiler.Emit(OpCode.Pop);
return(0);
}