001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.lang.psi;
018    
019    import com.intellij.psi.PsiElement;
020    import com.intellij.psi.util.PsiTreeUtil;
021    
022    public final class JetModifiableBlockHelper {
023        private JetModifiableBlockHelper() {
024        }
025    
026        /**
027         * Tested in OutOfBlockModificationTestGenerated
028         */
029        public static boolean shouldChangeModificationCount(PsiElement place) {
030            JetDeclaration declaration = PsiTreeUtil.getParentOfType(place, JetDeclaration.class, true);
031            if (declaration != null) {
032                if (declaration instanceof JetNamedFunction) {
033                    JetNamedFunction function = (JetNamedFunction) declaration;
034                    if (function.hasDeclaredReturnType() || function.hasBlockBody()) {
035                        return takePartInDeclarationTypeInference(function);
036                    }
037    
038                    return shouldChangeModificationCount(function);
039                }
040                else if (declaration instanceof JetPropertyAccessor) {
041                    return takePartInDeclarationTypeInference(declaration);
042                }
043                else if (declaration instanceof JetProperty) {
044                    JetProperty property = (JetProperty) declaration;
045                    if (property.getTypeRef() != null) {
046                        return takePartInDeclarationTypeInference(property);
047                    }
048    
049                    return shouldChangeModificationCount(property);
050                }
051                else if (declaration instanceof JetMultiDeclaration || declaration instanceof JetMultiDeclarationEntry) {
052                    return shouldChangeModificationCount(declaration);
053                }
054                else if (declaration instanceof JetFunctionLiteral) {
055                    // TODO: Check return type
056                    return shouldChangeModificationCount(declaration);
057                }
058            }
059    
060            return true;
061        }
062    
063        private static boolean takePartInDeclarationTypeInference(PsiElement place) {
064            JetDeclaration declaration = PsiTreeUtil.getParentOfType(place, JetDeclaration.class, true);
065            if (declaration != null) {
066                if (declaration instanceof JetNamedFunction) {
067                    JetNamedFunction function = (JetNamedFunction) declaration;
068                    if (!function.hasDeclaredReturnType() && !function.hasBlockBody()) {
069                        return true;
070                    }
071                }
072                else if (declaration instanceof JetProperty) {
073                    JetProperty property = (JetProperty) declaration;
074                    if (property.getTypeRef() == null) {
075                        return true;
076                    }
077                }
078    
079                return takePartInDeclarationTypeInference(declaration);
080            }
081    
082            return false;
083        }
084    }