Example usage for org.eclipse.jdt.core.compiler ITerminalSymbols TokenNameelse

Introduction

In this page you can find the example usage for org.eclipse.jdt.core.compiler ITerminalSymbols TokenNameelse.

Prototype

int TokenNameelse

To view the source code for org.eclipse.jdt.core.compiler ITerminalSymbols TokenNameelse.

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Usage

From source file:x10dt.ui.editor.formatting.X10AutoIndentStrategy.java

License:Open Source License

private boolean isClosed(IDocument document, int offset, int length) {
    CompilationUnitInfo info = getCompilationUnitForMethod(document, offset);
    if (info == null)
        return false;
    CompilationUnit compilationUnit = null;
    try {/* ww  w .j a va  2  s  . c  om*/
        ASTParser parser = ASTParser.newParser(AST.JLS3);
        parser.setSource(info.buffer);
        compilationUnit = (CompilationUnit) parser.createAST(null);
    } catch (ArrayIndexOutOfBoundsException x) {
        // work around for parser problem
        return false;
    }
    IProblem[] problems = compilationUnit.getProblems();
    for (int i = 0; i != problems.length; ++i) {
        if (problems[i].getID() == IProblem.UnmatchedBracket)
            return true;
    }
    final int relativeOffset = offset - info.delta;
    ASTNode node = NodeFinder.perform(compilationUnit, relativeOffset, length);
    if (length == 0) {
        while (node != null && (relativeOffset == node.getStartPosition()
                || relativeOffset == node.getStartPosition() + node.getLength()))
            node = node.getParent();
    }
    if (node == null)
        return false;
    switch (node.getNodeType()) {
    case ASTNode.BLOCK:
        return getBlockBalance(document, offset, fPartitioning) <= 0;
    case ASTNode.IF_STATEMENT: {
        IfStatement ifStatement = (IfStatement) node;
        Expression expression = ifStatement.getExpression();
        IRegion expressionRegion = createRegion(expression, info.delta);
        Statement thenStatement = ifStatement.getThenStatement();
        IRegion thenRegion = createRegion(thenStatement, info.delta);
        // between expression and then statement
        if (expressionRegion.getOffset() + expressionRegion.getLength() <= offset
                && offset + length <= thenRegion.getOffset())
            return thenStatement != null;
        Statement elseStatement = ifStatement.getElseStatement();
        IRegion elseRegion = createRegion(elseStatement, info.delta);
        if (elseStatement != null) {
            int sourceOffset = thenRegion.getOffset() + thenRegion.getLength();
            int sourceLength = elseRegion.getOffset() - sourceOffset;
            IRegion elseToken = getToken(document, new Region(sourceOffset, sourceLength),
                    ITerminalSymbols.TokenNameelse);
            return elseToken != null && elseToken.getOffset() + elseToken.getLength() <= offset
                    && offset + length < elseRegion.getOffset();
        }
    }
        break;
    case ASTNode.WHILE_STATEMENT:
    case ASTNode.FOR_STATEMENT: {
        Expression expression = node.getNodeType() == ASTNode.WHILE_STATEMENT
                ? ((WhileStatement) node).getExpression()
                : ((ForStatement) node).getExpression();
        IRegion expressionRegion = createRegion(expression, info.delta);
        Statement body = node.getNodeType() == ASTNode.WHILE_STATEMENT ? ((WhileStatement) node).getBody()
                : ((ForStatement) node).getBody();
        IRegion bodyRegion = createRegion(body, info.delta);
        // between expression and body statement
        if (expressionRegion.getOffset() + expressionRegion.getLength() <= offset
                && offset + length <= bodyRegion.getOffset())
            return body != null;
    }
        break;
    case ASTNode.DO_STATEMENT: {
        DoStatement doStatement = (DoStatement) node;
        IRegion doRegion = createRegion(doStatement, info.delta);
        Statement body = doStatement.getBody();
        IRegion bodyRegion = createRegion(body, info.delta);
        if (doRegion.getOffset() + doRegion.getLength() <= offset && offset + length <= bodyRegion.getOffset())
            return body != null;
    }
        break;
    }
    return true;
}

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