Examples with GrVariableDeclarationOwner org.jetbrains.plugins.groovy.lang.psi.api.util.GrVariableDeclarationOwner used on opensource projects

Example 6 with GrVariableDeclarationOwner

use of org.jetbrains.plugins.groovy.lang.psi.api.util.GrVariableDeclarationOwner in project intellij-community by JetBrains.

the class GroovyMethodInliner method inlineReferenceImpl.

@Nullable
static RangeMarker inlineReferenceImpl(@NotNull GrCallExpression call, @NotNull GrMethod method, boolean resultOfCallExplicitlyUsed, boolean isTailMethodCall, @Nullable Editor editor) {
    try {
        GroovyPsiElementFactory factory = GroovyPsiElementFactory.getInstance(call.getProject());
        final Project project = call.getProject();
        // Variable declaration for qualifier expression
        GrVariableDeclaration qualifierDeclaration = null;
        GrReferenceExpression innerQualifier = null;
        GrExpression qualifier = null;
        if (call instanceof GrMethodCallExpression && ((GrMethodCallExpression) call).getInvokedExpression() != null) {
            GrExpression invoked = ((GrMethodCallExpression) call).getInvokedExpression();
            if (invoked instanceof GrReferenceExpression && ((GrReferenceExpression) invoked).getQualifierExpression() != null) {
                qualifier = ((GrReferenceExpression) invoked).getQualifierExpression();
                if (PsiUtil.isSuperReference(qualifier)) {
                    qualifier = null;
                } else if (!GroovyInlineMethodUtil.isSimpleReference(qualifier)) {
                    String qualName = generateQualifierName(call, method, project, qualifier);
                    qualifier = (GrExpression) PsiUtil.skipParentheses(qualifier, false);
                    qualifierDeclaration = factory.createVariableDeclaration(ArrayUtil.EMPTY_STRING_ARRAY, qualifier, null, qualName);
                    innerQualifier = (GrReferenceExpression) factory.createExpressionFromText(qualName);
                } else {
                    innerQualifier = (GrReferenceExpression) qualifier;
                }
            }
        }
        GrMethod _method = prepareNewMethod(call, method, qualifier);
        GrExpression result = getAloneResultExpression(_method);
        if (result != null) {
            GrExpression expression = call.replaceWithExpression(result, false);
            TextRange range = expression.getTextRange();
            return editor != null ? editor.getDocument().createRangeMarker(range.getStartOffset(), range.getEndOffset(), true) : null;
        }
        GrMethod newMethod = prepareNewMethod(call, method, innerQualifier);
        String resultName = InlineMethodConflictSolver.suggestNewName("result", newMethod, call);
        // Add variable for method result
        Collection<GrStatement> returnStatements = ControlFlowUtils.collectReturns(newMethod.getBlock());
        final int returnCount = returnStatements.size();
        PsiType methodType = method.getInferredReturnType();
        GrOpenBlock body = newMethod.getBlock();
        assert body != null;
        GrExpression replaced;
        if (resultOfCallExplicitlyUsed && !isTailMethodCall) {
            GrExpression resultExpr = null;
            if (PsiType.VOID.equals(methodType)) {
                resultExpr = factory.createExpressionFromText("null");
            } else if (returnCount == 1) {
                final GrExpression returnExpression = ControlFlowUtils.extractReturnExpression(returnStatements.iterator().next());
                if (returnExpression != null) {
                    resultExpr = factory.createExpressionFromText(returnExpression.getText());
                }
            } else if (returnCount > 1) {
                resultExpr = factory.createExpressionFromText(resultName);
            }
            if (resultExpr == null) {
                resultExpr = factory.createExpressionFromText("null");
            }
            replaced = call.replaceWithExpression(resultExpr, false);
        } else {
            replaced = call;
        }
        // Calculate anchor to insert before
        GrExpression enclosingExpr = GroovyRefactoringUtil.addBlockIntoParent(replaced);
        GrVariableDeclarationOwner owner = PsiTreeUtil.getParentOfType(enclosingExpr, GrVariableDeclarationOwner.class);
        assert owner != null;
        PsiElement element = enclosingExpr;
        while (element != null && element.getParent() != owner) {
            element = element.getParent();
        }
        assert element != null && element instanceof GrStatement;
        GrStatement anchor = (GrStatement) element;
        if (!resultOfCallExplicitlyUsed) {
            assert anchor == enclosingExpr;
        }
        // add qualifier reference declaration
        if (qualifierDeclaration != null) {
            owner.addVariableDeclarationBefore(qualifierDeclaration, anchor);
        }
        // Process method return statements
        if (returnCount > 1 && !PsiType.VOID.equals(methodType) && !isTailMethodCall) {
            PsiType type = methodType != null && methodType.equalsToText(CommonClassNames.JAVA_LANG_OBJECT) ? null : methodType;
            GrVariableDeclaration resultDecl = factory.createVariableDeclaration(ArrayUtil.EMPTY_STRING_ARRAY, "", type, resultName);
            GrStatement statement = ((GrStatementOwner) owner).addStatementBefore(resultDecl, anchor);
            JavaCodeStyleManager.getInstance(statement.getProject()).shortenClassReferences(statement);
            // Replace all return statements with assignments to 'result' variable
            for (GrStatement returnStatement : returnStatements) {
                GrExpression value = ControlFlowUtils.extractReturnExpression(returnStatement);
                if (value != null) {
                    GrExpression assignment = factory.createExpressionFromText(resultName + " = " + value.getText());
                    returnStatement.replaceWithStatement(assignment);
                } else {
                    returnStatement.replaceWithStatement(factory.createExpressionFromText(resultName + " = null"));
                }
            }
        }
        if (!isTailMethodCall && resultOfCallExplicitlyUsed && returnCount == 1) {
            returnStatements.iterator().next().removeStatement();
        } else if (!isTailMethodCall && (PsiType.VOID.equals(methodType) || returnCount == 1)) {
            for (GrStatement returnStatement : returnStatements) {
                if (returnStatement instanceof GrReturnStatement) {
                    final GrExpression returnValue = ((GrReturnStatement) returnStatement).getReturnValue();
                    if (returnValue != null && GroovyRefactoringUtil.hasSideEffect(returnValue)) {
                        returnStatement.replaceWithStatement(returnValue);
                        continue;
                    }
                } else if (GroovyRefactoringUtil.hasSideEffect(returnStatement)) {
                    continue;
                }
                returnStatement.removeStatement();
            }
        }
        // Add all method statements
        GrStatement[] statements = body.getStatements();
        for (GrStatement statement : statements) {
            ((GrStatementOwner) owner).addStatementBefore(statement, anchor);
        }
        if (resultOfCallExplicitlyUsed && !isTailMethodCall) {
            TextRange range = replaced.getTextRange();
            RangeMarker marker = editor != null ? editor.getDocument().createRangeMarker(range.getStartOffset(), range.getEndOffset(), true) : null;
            reformatOwner(owner);
            return marker;
        } else {
            GrStatement stmt;
            if (isTailMethodCall && enclosingExpr.getParent() instanceof GrReturnStatement) {
                stmt = (GrReturnStatement) enclosingExpr.getParent();
            } else {
                stmt = enclosingExpr;
            }
            stmt.removeStatement();
            reformatOwner(owner);
            return null;
        }
    } catch (IncorrectOperationException e) {
        LOG.error(e);
    }
    return null;
}