Examples with ASTRewriteCorrectionProposal org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal used on opensource projects

Example 86 with ASTRewriteCorrectionProposal

use of org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal in project che by eclipse.

the class AdvancedQuickAssistProcessor method getInverseConditionProposals.

private static boolean getInverseConditionProposals(IInvocationContext context, ASTNode covering, ArrayList<ASTNode> coveredNodes, Collection<ICommandAccess> resultingCollections) {
    if (coveredNodes.isEmpty()) {
        return false;
    }
    //
    final AST ast = covering.getAST();
    final ASTRewrite rewrite = ASTRewrite.create(ast);
    // check sub-expressions in fully covered nodes
    boolean hasChanges = false;
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        ASTNode covered = iter.next();
        Expression coveredExpression = getBooleanExpression(covered);
        if (coveredExpression != null) {
            Expression inversedExpression = getInversedExpression(rewrite, coveredExpression);
            rewrite.replace(coveredExpression, inversedExpression, null);
            hasChanges = true;
        }
    }
    //
    if (!hasChanges) {
        return false;
    }
    if (resultingCollections == null) {
        return true;
    }
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_inverseConditions_description;
    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.INVERSE_CONDITIONS, image);
    resultingCollections.add(proposal);
    return true;
}

Example 87 with ASTRewriteCorrectionProposal

use of org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal in project che by eclipse.

the class AdvancedQuickAssistProcessor method getPushNegationDownProposals.

private static boolean getPushNegationDownProposals(IInvocationContext context, ASTNode covering, Collection<ICommandAccess> resultingCollections) {
    PrefixExpression negationExpression = null;
    ParenthesizedExpression parenthesizedExpression = null;
    // check for case when cursor is on '!' before parentheses
    if (covering instanceof PrefixExpression) {
        PrefixExpression prefixExpression = (PrefixExpression) covering;
        if (prefixExpression.getOperator() == PrefixExpression.Operator.NOT && prefixExpression.getOperand() instanceof ParenthesizedExpression) {
            negationExpression = prefixExpression;
            parenthesizedExpression = (ParenthesizedExpression) prefixExpression.getOperand();
        }
    }
    // check for case when cursor is on parenthesized expression that is negated
    if (covering instanceof ParenthesizedExpression && covering.getParent() instanceof PrefixExpression && ((PrefixExpression) covering.getParent()).getOperator() == PrefixExpression.Operator.NOT) {
        negationExpression = (PrefixExpression) covering.getParent();
        parenthesizedExpression = (ParenthesizedExpression) covering;
    }
    if (negationExpression == null || (!(parenthesizedExpression.getExpression() instanceof InfixExpression) && !(parenthesizedExpression.getExpression() instanceof ConditionalExpression))) {
        return false;
    }
    //  we could produce quick assist
    if (resultingCollections == null) {
        return true;
    }
    //
    final AST ast = covering.getAST();
    final ASTRewrite rewrite = ASTRewrite.create(ast);
    // prepared inverted expression
    Expression inversedExpression = getInversedExpression(rewrite, parenthesizedExpression.getExpression());
    // check, may be we should keep parentheses
    boolean keepParentheses = false;
    if (negationExpression.getParent() instanceof Expression) {
        int parentPrecedence = OperatorPrecedence.getExpressionPrecedence(((Expression) negationExpression.getParent()));
        int inversedExpressionPrecedence = OperatorPrecedence.getExpressionPrecedence(inversedExpression);
        keepParentheses = parentPrecedence > inversedExpressionPrecedence;
    }
    // replace negated expression with inverted one
    if (keepParentheses) {
        ParenthesizedExpression pe = ast.newParenthesizedExpression();
        pe.setExpression(inversedExpression);
        rewrite.replace(negationExpression, pe, null);
    } else {
        rewrite.replace(negationExpression, inversedExpression, null);
    }
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_pushNegationDown;
    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.PULL_NEGATION_DOWN, image);
    resultingCollections.add(proposal);
    return true;
}

Example 88 with ASTRewriteCorrectionProposal

use of org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal in project che by eclipse.

the class AdvancedQuickAssistProcessor method getInverseIfContinueIntoIfThenInLoopsProposals.

private static boolean getInverseIfContinueIntoIfThenInLoopsProposals(IInvocationContext context, ASTNode covering, Collection<ICommandAccess> resultingCollections) {
    if (!(covering instanceof IfStatement)) {
        return false;
    }
    IfStatement ifStatement = (IfStatement) covering;
    if (ifStatement.getElseStatement() != null) {
        return false;
    }
    // check that 'then' is 'continue'
    if (!(ifStatement.getThenStatement() instanceof ContinueStatement)) {
        return false;
    }
    // check that 'if' statement is statement in block that is body of loop
    Block loopBlock = null;
    if (ifStatement.getParent() instanceof Block && ifStatement.getParent().getParent() instanceof ForStatement) {
        loopBlock = (Block) ifStatement.getParent();
    } else if (ifStatement.getParent() instanceof Block && ifStatement.getParent().getParent() instanceof WhileStatement) {
        loopBlock = (Block) ifStatement.getParent();
    } else {
        return false;
    }
    if (resultingCollections == null) {
        return true;
    }
    //
    AST ast = covering.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    // create inverted 'if' statement
    Expression inversedExpression = getInversedExpression(rewrite, ifStatement.getExpression());
    IfStatement newIf = ast.newIfStatement();
    newIf.setExpression(inversedExpression);
    // prepare 'then' for new 'if'
    Block thenBlock = ast.newBlock();
    int ifIndex = loopBlock.statements().indexOf(ifStatement);
    for (int i = ifIndex + 1; i < loopBlock.statements().size(); i++) {
        Statement statement = (Statement) loopBlock.statements().get(i);
        thenBlock.statements().add(rewrite.createMoveTarget(statement));
    }
    newIf.setThenStatement(thenBlock);
    // replace 'if' statement in loop
    rewrite.replace(ifStatement, newIf, null);
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_inverseIfContinue_description;
    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.INVERSE_IF_CONTINUE, image);
    resultingCollections.add(proposal);
    return true;
}

Example 89 with ASTRewriteCorrectionProposal

use of org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal in project che by eclipse.

the class AdvancedQuickAssistProcessor method getJoinOrIfStatementsProposals.

private static boolean getJoinOrIfStatementsProposals(IInvocationContext context, ASTNode covering, ArrayList<ASTNode> coveredNodes, Collection<ICommandAccess> resultingCollections) {
    Operator orOperator = InfixExpression.Operator.CONDITIONAL_OR;
    if (coveredNodes.size() < 2)
        return false;
    // check that all covered nodes are IfStatement's with same 'then' statement and without 'else'
    String commonThenSource = null;
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        ASTNode node = iter.next();
        if (!(node instanceof IfStatement))
            return false;
        //
        IfStatement ifStatement = (IfStatement) node;
        if (ifStatement.getElseStatement() != null)
            return false;
        //
        Statement thenStatement = ifStatement.getThenStatement();
        try {
            String thenSource = context.getCompilationUnit().getBuffer().getText(thenStatement.getStartPosition(), thenStatement.getLength());
            if (commonThenSource == null) {
                commonThenSource = thenSource;
            } else {
                if (!commonThenSource.equals(thenSource))
                    return false;
            }
        } catch (Throwable e) {
            return false;
        }
    }
    if (resultingCollections == null) {
        return true;
    }
    //
    final AST ast = covering.getAST();
    final ASTRewrite rewrite = ASTRewrite.create(ast);
    // prepare OR'ed condition
    InfixExpression condition = null;
    boolean hasRightOperand = false;
    Statement thenStatement = null;
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        IfStatement ifStatement = (IfStatement) iter.next();
        if (thenStatement == null)
            thenStatement = (Statement) rewrite.createCopyTarget(ifStatement.getThenStatement());
        if (condition == null) {
            condition = ast.newInfixExpression();
            condition.setOperator(orOperator);
            condition.setLeftOperand(getParenthesizedExpressionIfNeeded(ast, rewrite, ifStatement.getExpression(), condition, InfixExpression.LEFT_OPERAND_PROPERTY));
        } else if (!hasRightOperand) {
            condition.setRightOperand(getParenthesizedExpressionIfNeeded(ast, rewrite, ifStatement.getExpression(), condition, InfixExpression.RIGHT_OPERAND_PROPERTY));
            hasRightOperand = true;
        } else {
            InfixExpression newCondition = ast.newInfixExpression();
            newCondition.setOperator(orOperator);
            newCondition.setLeftOperand(condition);
            newCondition.setRightOperand(getParenthesizedExpressionIfNeeded(ast, rewrite, ifStatement.getExpression(), condition, InfixExpression.RIGHT_OPERAND_PROPERTY));
            condition = newCondition;
        }
    }
    // prepare new IfStatement with OR'ed condition
    IfStatement newIf = ast.newIfStatement();
    newIf.setExpression(condition);
    newIf.setThenStatement(thenStatement);
    //
    ListRewrite listRewriter = null;
    for (Iterator<ASTNode> iter = coveredNodes.iterator(); iter.hasNext(); ) {
        IfStatement ifStatement = (IfStatement) iter.next();
        if (listRewriter == null) {
            Block sourceBlock = (Block) ifStatement.getParent();
            //int insertIndex = sourceBlock.statements().indexOf(ifStatement);
            listRewriter = rewrite.getListRewrite(sourceBlock, (ChildListPropertyDescriptor) ifStatement.getLocationInParent());
        }
        if (newIf != null) {
            listRewriter.replace(ifStatement, newIf, null);
            newIf = null;
        } else {
            listRewriter.remove(ifStatement, null);
        }
    }
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_joinWithOr_description;
    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.JOIN_IF_STATEMENTS_WITH_OR, image);
    resultingCollections.add(proposal);
    return true;
}

Example 90 with ASTRewriteCorrectionProposal

use of org.eclipse.jdt.ui.text.java.correction.ASTRewriteCorrectionProposal in project che by eclipse.

the class AdvancedQuickAssistProcessor method getIfReturnIntoIfElseAtEndOfVoidMethodProposals.

private static boolean getIfReturnIntoIfElseAtEndOfVoidMethodProposals(IInvocationContext context, ASTNode covering, Collection<ICommandAccess> resultingCollections) {
    if (!(covering instanceof IfStatement)) {
        return false;
    }
    IfStatement ifStatement = (IfStatement) covering;
    if (ifStatement.getElseStatement() != null) {
        return false;
    }
    // 'then' block should have 'return' as last statement
    Statement thenStatement = ifStatement.getThenStatement();
    if (!(thenStatement instanceof Block)) {
        return false;
    }
    Block thenBlock = (Block) thenStatement;
    List<Statement> thenStatements = thenBlock.statements();
    if (thenStatements.isEmpty() || !(thenStatements.get(thenStatements.size() - 1) instanceof ReturnStatement)) {
        return false;
    }
    // method should return 'void'
    MethodDeclaration coveringMetod = ASTResolving.findParentMethodDeclaration(covering);
    if (coveringMetod == null) {
        return false;
    }
    Type returnType = coveringMetod.getReturnType2();
    if (!isVoid(returnType)) {
        return false;
    }
    //
    List<Statement> statements = coveringMetod.getBody().statements();
    int ifIndex = statements.indexOf(ifStatement);
    if (ifIndex == -1) {
        return false;
    }
    //  we could produce quick assist
    if (resultingCollections == null) {
        return true;
    }
    //
    AST ast = covering.getAST();
    ASTRewrite rewrite = ASTRewrite.create(ast);
    // remove last 'return' in 'then' block
    ListRewrite listRewriter = rewrite.getListRewrite(thenBlock, (ChildListPropertyDescriptor) ifStatement.getLocationInParent());
    listRewriter.remove(thenStatements.get(thenStatements.size() - 1), null);
    // prepare original nodes
    Expression conditionPlaceholder = (Expression) rewrite.createMoveTarget(ifStatement.getExpression());
    Statement thenPlaceholder = (Statement) rewrite.createMoveTarget(ifStatement.getThenStatement());
    // prepare 'else' block
    Block elseBlock = ast.newBlock();
    for (int i = ifIndex + 1; i < statements.size(); i++) {
        Statement statement = statements.get(i);
        elseBlock.statements().add(rewrite.createMoveTarget(statement));
    }
    // prepare new 'if' statement
    IfStatement newIf = ast.newIfStatement();
    newIf.setExpression(conditionPlaceholder);
    newIf.setThenStatement(thenPlaceholder);
    newIf.setElseStatement(elseBlock);
    rewrite.replace(ifStatement, newIf, null);
    // add correction proposal
    String label = CorrectionMessages.AdvancedQuickAssistProcessor_convertToIfElse_description;
    Image image = JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE);
    ASTRewriteCorrectionProposal proposal = new ASTRewriteCorrectionProposal(label, context.getCompilationUnit(), rewrite, IProposalRelevance.CONVERT_TO_IF_ELSE, image);
    resultingCollections.add(proposal);
    return true;
}