public void evalInstruction(InstructionExpression instr)
{
if (instr is ValueExpression)
{
valueExp = (ValueExpression)instr;
if (valueExp.type == ObjectType.intType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, 0));
}
else if (valueExp.type == ObjectType.booleanType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, false));
}
else if (valueExp.type == ObjectType.stringType)
{
variables.Add(valueExp.name, new ObjectExpression(valueExp.type, ""));
}
if (valueExp.value != null)
{
variables[valueExp.name] = new ObjectExpression(valueExp.type, evalSimpleExpression(valueExp.value).value);
}
return;
}
else if (instr is AssignExpression)
{
assignExp = (AssignExpression)instr;
variables[assignExp.name] = evalSimpleExpression(assignExp.value);
return;
}
else if (instr is OpenMsgDialogInstruction)
{
gScreen.msgBox.openBox();
return;
}
else if (instr is MsgDisplayInstruction)
{
msgExp = (MsgDisplayInstruction)instr;
o1 = evalSimpleExpression(msgExp.msg);
if (o1.type != ObjectType.stringType)
{
return;
}
gScreen.msgBox.setText((string)o1.value);
return;
}
else if (instr is NextMsgDialogInstruction)
{
shouldEvalSeq = false;
gScreen.msgBox.showNextButton();
return;
}
else if (instr is CloseMsgDialogInstruction)
{
shouldEvalSeq = false;
gScreen.msgBox.showCloseButton();
return;
}
else if (instr is SwitchCharacterInstruction)
{
try
{
gScreen.msgBox.switchCharacter(IrisData.characters[((SwitchCharacterInstruction)instr).character.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is RemoveCharacter)
{
gScreen.msgBox.removeCharacter();
return;
}
else if (instr is SetVariableInstruction)
{
setExp = (SetVariableInstruction)instr;
/*if (!playerVariables.ContainsKey(setExp.variable.name))
{
playerVariables.Add(setExp.variable.name, -1);
}
playerVariables[setExp.variable.name] = (int)(evalSimpleExpression(setExp.value).value);*/
IrisData.setPlayerVariable(setExp.variable.name, (int)(evalSimpleExpression(setExp.value).value));
return;
}
else if (instr is InputInstruction)
{
inputExp = (InputInstruction)instr;
o1 = variables[inputExp.name];
shouldEvalSeq = false;
if (o1.type == ObjectType.intType)
{
gScreen.iBox.openBox(InputBox.InputType.INT_INPUT);
lastInstr = inputExp;
}
else if (o1.type == ObjectType.stringType)
{
gScreen.iBox.openBox(InputBox.InputType.STRING_INPUT);
lastInstr = inputExp;
}
return;
}
else if (instr is MenuInstruction)
{
menuExp = (MenuInstruction)instr;
shouldEvalSeq = false;
gScreen.menBox.setChoices(((MenuInstruction)instr).choices);
gScreen.menBox.openMenu();
lastInstr = menuExp;
return;
}
else if (instr is PlayMediaInstruction)
{
playExp = (PlayMediaInstruction)instr;
/*if (!IrisData.sounds.ContainsKey(playExp.name))
{
return;
}*/
//else if(IrisData.
try
{
gScreen.playMedia(IrisData.sounds[playExp.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is StopMediaInstruction)
{
gScreen.stopMedia();
return;
}
else if (instr is ShowImageInstruction)
{
showExp = (ShowImageInstruction)instr;
if (showExp.image is VariableExpression)
{
img = IrisData.images[((VariableExpression)showExp.image).name];
}
else
{
memberExp = (MemberAccessExpression)showExp.image;
charac = IrisData.characters[memberExp.name];
img = charac.getImage(memberExp.field);
}
gScreen.showImage(img, showExp.position);
return;
}
else if (instr is SetBackgroundInstruction)
{
bgdInstr = (SetBackgroundInstruction)instr;
try
{
gScreen.setBackground(IrisData.backgrounds[bgdInstr.image.name]);
}
catch (Exception e)
{
return;
}
return;
}
else if (instr is CleanBackgroundInstruction)
{
gScreen.clearBackground();
return;
}
else if (instr is CleanForegroundInstruction)
{
gScreen.clearForeGround();
return;
}
else if (instr is GotoInstruction)
{
gotoExp = (GotoInstruction)instr;
npcExp = gotoExp.npc;
evalExpression(IrisData.npcs[npcExp.npc].labels[npcExp.label]);
return;
}
}
public Expression parseExpression()
{
List<Expression> exps = new List<Expression>();
bool parseEnd = false;
while (!parseEnd)
{
switch (currentToken.type)
{
case Token.TokenValue.IF:
exps.Add(parseIfExpression());
break;
case Token.TokenValue.SWITCH:
exps.Add(parseSwitchExpression());
break;
case Token.TokenValue.FOR:
exps.Add(parseForExpression());
break;
case Token.TokenValue.WHILE:
exps.Add(parseWhileExpression());
break;
case Token.TokenValue.DO:
exps.Add(parseDoWhileExpression());
break;
case Token.TokenValue.TYPE_IDENTIFIER:
exps.Add(parseValueExpression());
break;
case Token.TokenValue.VALUE_IDENTIFIER:
nextToken();
if (currentTokenEquals(Token.TokenValue.TWOPOINTS))
{
previousToken();
parseEnd = true;
}
else if (isAnAssignOperator(currentToken.type))
{
previousToken();
exps.Add(parseAssignExpression());
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.EQ);
}
break;
//**TODO**
case Token.TokenValue.SET:
SetVariableInstruction setExp = new SetVariableInstruction();
nextToken();
if (currentTokenEquals(Token.TokenValue.PLAYER_VALUE_IDENTIFIER))
{
setExp.variable = new CharacterVariableExpression(currentToken.stringValue);
nextToken();
nextTokenIfEquals(Token.TokenValue.COMMA);
setExp.value = parseSimpleExpression();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.PLAYER_VALUE_IDENTIFIER);
}
exps.Add(setExp);
break;
case Token.TokenValue.OPENDLG:
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(new OpenMsgDialogInstruction());
break;
case Token.TokenValue.MSG:
MsgDisplayInstruction mes = new MsgDisplayInstruction();
nextToken();
mes.msg = parseSimpleExpression();
if (mes.msg.getExpressionType() != ObjectType.stringType)
{
throw new IncompatibleTypesException(lineNumber, colNumber, ObjectType.stringType, mes.msg.getExpressionType());
}
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(mes);
break;
case Token.TokenValue.NEXTDLG:
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(new NextMsgDialogInstruction());
break;
case Token.TokenValue.CLOSEDLG:
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(new CloseMsgDialogInstruction());
break;
case Token.TokenValue.PLAY:
PlayMediaInstruction play = new PlayMediaInstruction();
nextToken();
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
play.name = currentToken.stringValue;
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.VALUE_IDENTIFIER);
}
exps.Add(play);
break;
case Token.TokenValue.STOP:
exps.Add(new StopMediaInstruction());
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
break;
case Token.TokenValue.SHOW:
ShowImageInstruction show = new ShowImageInstruction();
string position;
nextToken();
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
show.image = parsePathExpression();
nextTokenIfEquals(Token.TokenValue.COMMA);
//TODO
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
position = currentToken.stringValue;
switch (position)
{
case "LEFT":
case "left":
show.position = GameScreen.LEFT;
break;
case "CENTER":
case "center":
show.position = GameScreen.CENTER;
break;
case "RIGHT":
case "right":
show.position = GameScreen.RIGHT;
break;
default:
//TODO
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.VALUE_IDENTIFIER);
}
}
nextTokenIfEquals(Token.TokenValue.VALUE_IDENTIFIER);
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
exps.Add(show);
break;
case Token.TokenValue.SWITCHCHAR:
SwitchCharacterInstruction switchChar = new SwitchCharacterInstruction();
nextToken();
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
switchChar.character = new VariableExpression(currentToken.stringValue);
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.VALUE_IDENTIFIER);
}
exps.Add(switchChar);
break;
case Token.TokenValue.SETBGD:
SetBackgroundInstruction bgdInstr = new SetBackgroundInstruction();
nextToken();
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
bgdInstr.image = new VariableExpression(currentToken.stringValue);
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.VALUE_IDENTIFIER);
}
exps.Add(bgdInstr);
break;
case Token.TokenValue.CLEANBGD:
exps.Add(new CleanBackgroundInstruction());
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
break;
case Token.TokenValue.CLEANFGD:
exps.Add(new CleanForegroundInstruction());
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
break;
case Token.TokenValue.REMOVECHAR:
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(new RemoveCharacter());
break;
case Token.TokenValue.GOTO:
GotoInstruction gotoInstr = new GotoInstruction();
nextToken();
gotoInstr.npc = parseNpcMemberExpression();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(gotoInstr);
break;
case Token.TokenValue.INPUT:
InputInstruction inputInstr = new InputInstruction();
nextToken();
if (currentTokenEquals(Token.TokenValue.VALUE_IDENTIFIER))
{
inputInstr.name = currentToken.stringValue;
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.VALUE_IDENTIFIER);
}
exps.Add(inputInstr);
break;
case Token.TokenValue.MENU:
MenuInstruction menuInstr = new MenuInstruction();
nextToken();
nextTokenIfEquals(Token.TokenValue.LPAR);
if (currentTokenEquals(Token.TokenValue.RPAR))
{
throw new EmptyExpression(lineNumber, colNumber);
}
if (currentTokenEquals(Token.TokenValue.STRING))
{
menuInstr.addChoice(currentToken.stringValue);
nextToken();
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.STRING);
}
while (!currentTokenEquals(Token.TokenValue.RPAR))
{
nextTokenIfEquals(Token.TokenValue.COMMA);
if (currentTokenEquals(Token.TokenValue.STRING))
{
menuInstr.addChoice(currentToken.stringValue);
nextToken();
}
else
{
throw new SyntaxError(lineNumber, colNumber, Token.TokenValue.STRING);
}
}
nextTokenIfEquals(Token.TokenValue.RPAR);
nextTokenIfEquals(Token.TokenValue.LBRACE);
while (currentTokenEquals(Token.TokenValue.CASE))
{
if (menuInstr.hasDefaultCase)
{
throw new CaseException(lineNumber, colNumber);
}
menuInstr.addCase(parseCase());
}
if (currentTokenEquals(Token.TokenValue.DEFAULT))
{
if (menuInstr.hasDefaultCase)
{
throw new DefaultCaseException(lineNumber, colNumber);
}
menuInstr.addCase(parseCase());
}
nextTokenIfEquals(Token.TokenValue.RBRACE);
exps.Add(menuInstr);
break;
case Token.TokenValue.END:
nextToken();
nextTokenIfEquals(Token.TokenValue.SEMICOLON);
exps.Add(new EndInstruction());
break;
default:
parseEnd = true;
break;
}
}
switch (exps.Count)
{
case 0:
return null;
case 1:
return exps.ElementAt(0);
default:
return new SequenceExpression(exps);
}
}