/*
* ASTASIfStatement.java
*
* Copyright (c) 2006-2008 David Holroyd
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package uk.co.badgersinfoil.metaas.impl;
import org.asdt.core.internal.antlr.AS3Parser;
import uk.co.badgersinfoil.metaas.SyntaxException;
import uk.co.badgersinfoil.metaas.dom.ASBlock;
import uk.co.badgersinfoil.metaas.dom.Expression;
import uk.co.badgersinfoil.metaas.dom.ASIfStatement;
import uk.co.badgersinfoil.metaas.dom.Statement;
import uk.co.badgersinfoil.metaas.dom.StatementContainer;
import uk.co.badgersinfoil.metaas.impl.antlr.LinkedListTree;
public class ASTASIfStatement extends ContainerDelegate implements ASIfStatement {
private static final int THEN_INDEX = 1;
private static final int ELSE_INDEX = 2;
public ASTASIfStatement(LinkedListTree ast) {
super(ast);
ASTUtils.assertAS3TokenTypeIs(AS3Parser.IF, ast.getType());
}
protected StatementContainer getStatementContainer() {
LinkedListTree child = thenClause();
if (AS3Parser.BLOCK != child.getType()) {
throw new SyntaxException("statement is not a block");
}
return new ASTStatementList(child);
}
private LinkedListTree thenClause() {
return (LinkedListTree)ast.getChild(THEN_INDEX);
}
public Statement getThenStatement() {
return StatementBuilder.build(thenClause());
}
public ASBlock getElse() {
return elseBlock();
}
private LinkedListTree elseClause() {
return (LinkedListTree)ast.getChild(ELSE_INDEX);
}
public ASBlock elseBlock() {
LinkedListTree elseClause = elseClause();
if (elseClause == null) {
String indent = ASTUtils.findIndent(ast);
elseClause = ASTUtils.newAST(AS3Parser.ELSE, "else");
ast.appendToken(TokenBuilder.newSpace());
ast.addChildWithTokens(elseClause);
elseClause.appendToken(TokenBuilder.newSpace());
LinkedListTree block = ASTBuilder.newBlock();
elseClause.addChildWithTokens(block);
ASTUtils.increaseIndentAfterFirstLine(block, indent);
return new ASTStatementList(block);
}
Statement stmt = StatementBuilder.build(elseClause.getFirstChild());
if (!(stmt instanceof ASBlock)) {
throw new SyntaxException("Expected a block, got "+ASTUtils.tokenName(elseClause.getFirstChild()));
}
return (ASBlock)stmt;
}
public Statement getElseStatement() {
LinkedListTree elseClause = elseClause();
if (elseClause == null) {
return null;
}
return StatementBuilder.build(elseClause.getFirstChild());
}
public void setThen(ASBlock block) {
LinkedListTree theBlock = ((ASTStatementList)block).getAST();
ASTIterator i = new ASTIterator(ast);
i.next(); // move to condition
i.next(); // move to then-branch
i.replace(theBlock);
String indent = ASTUtils.findIndent(ast);
ASTUtils.increaseIndentAfterFirstLine(theBlock, indent);
}
public void setThenStatement(Statement then) {
LinkedListTree thenAST = ((ASTStatementList)then).getAST();
ast.setChildWithTokens(THEN_INDEX, thenAST);
if (AS3Parser.BLOCK == thenAST.getType()) {
String indent = ASTUtils.findIndent(ast);
ASTUtils.increaseIndentAfterFirstLine(thenAST, indent);
}
}
private LinkedListTree condition() {
return ast.getFirstChild();
}
public String getConditionString() {
return ASTUtils.stringifyNode(condition().getFirstChild());
}
public void setCondition(String expr) {
LinkedListTree cond = AS3FragmentParser.parseCondition(expr);
ast.setChildWithTokens(0, cond);
}
public Expression getCondition() {
return ExpressionBuilder.build(condition().getFirstChild());
}
public void setCondition(Expression expr) {
LinkedListTree condExpr = ((ASTExpression)expr).getAST();
condition().setChildWithTokens(0, condExpr);
}
}