| |
| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * 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 com.intellij.psi.impl; |
| |
| import com.intellij.ide.util.PsiNavigationSupport; |
| import com.intellij.navigation.ItemPresentation; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Comparing; |
| import com.intellij.pom.Navigatable; |
| import com.intellij.psi.*; |
| import com.intellij.psi.scope.PsiScopeProcessor; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.psi.search.SearchScope; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.lang.reflect.Array; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public abstract class PsiElementBase extends ElementBase implements NavigatablePsiElement { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.PsiElementBase"); |
| |
| @Override |
| public PsiElement getFirstChild() { |
| PsiElement[] children = getChildren(); |
| if (children.length == 0) return null; |
| return children[0]; |
| } |
| |
| @Override |
| public PsiElement getLastChild() { |
| PsiElement[] children = getChildren(); |
| if (children.length == 0) return null; |
| return children[children.length - 1]; |
| } |
| |
| @Override |
| public PsiElement getNextSibling() { |
| return SharedPsiElementImplUtil.getNextSibling(this); |
| } |
| |
| @Override |
| public PsiElement getPrevSibling() { |
| return SharedPsiElementImplUtil.getPrevSibling(this); |
| } |
| |
| @Override |
| public void acceptChildren(@NotNull PsiElementVisitor visitor) { |
| PsiElement child = getFirstChild(); |
| while (child != null) { |
| child.accept(visitor); |
| child = child.getNextSibling(); |
| } |
| } |
| |
| @Override |
| public PsiReference getReference() { |
| return null; |
| } |
| |
| @Override |
| @NotNull |
| public PsiReference[] getReferences() { |
| return SharedPsiElementImplUtil.getReferences(this); |
| } |
| |
| @Override |
| public PsiReference findReferenceAt(int offset) { |
| return SharedPsiElementImplUtil.findReferenceAt(this, offset); |
| } |
| |
| @Override |
| public PsiElement addRange(PsiElement first, PsiElement last) throws IncorrectOperationException { |
| throw new IncorrectOperationException("Operation not supported in: " + getClass()); |
| } |
| |
| @Override |
| public PsiElement addRangeBefore(@NotNull PsiElement first, @NotNull PsiElement last, PsiElement anchor) |
| throws IncorrectOperationException { |
| throw new IncorrectOperationException("Operation not supported in: " + getClass()); |
| } |
| |
| @Override |
| public PsiElement addRangeAfter(PsiElement first, PsiElement last, PsiElement anchor) |
| throws IncorrectOperationException { |
| throw new IncorrectOperationException("Operation not supported in: " + getClass()); |
| } |
| |
| @Override |
| public void deleteChildRange(PsiElement first, PsiElement last) throws IncorrectOperationException { |
| throw new IncorrectOperationException("Operation not supported in: " + getClass()); |
| } |
| |
| @Override |
| public PsiElement copy() { |
| return (PsiElement)clone(); |
| } |
| |
| @Override |
| public PsiElement add(@NotNull PsiElement element) throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public PsiElement addBefore(@NotNull PsiElement element, PsiElement anchor) throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public PsiElement addAfter(@NotNull PsiElement element, PsiElement anchor) throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public void checkAdd(@NotNull PsiElement element) throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public void delete() throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public void checkDelete() throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public PsiElement replace(@NotNull PsiElement newElement) throws IncorrectOperationException { |
| throw new UnsupportedOperationException(getClass().getName()); |
| } |
| |
| @Override |
| public boolean textContains(char c) { |
| return getText().indexOf(c) >= 0; |
| } |
| |
| @Override |
| public boolean processDeclarations(@NotNull PsiScopeProcessor processor, |
| @NotNull ResolveState state, |
| PsiElement lastParent, |
| @NotNull PsiElement place) { |
| return true; |
| } |
| |
| @Override |
| public PsiElement getContext() { |
| return getParent(); |
| } |
| |
| @Override |
| @NotNull |
| public PsiElement getNavigationElement() { |
| return this; |
| } |
| |
| @Override |
| public PsiElement getOriginalElement() { |
| return this; |
| } |
| |
| @Override |
| @NotNull |
| public GlobalSearchScope getResolveScope() { |
| return ResolveScopeManager.getElementResolveScope(this); |
| } |
| |
| @Override |
| @NotNull |
| public SearchScope getUseScope() { |
| return ResolveScopeManager.getElementUseScope(this); |
| } |
| |
| @Override |
| public void navigate(boolean requestFocus) { |
| final Navigatable descriptor = PsiNavigationSupport.getInstance().getDescriptor(this); |
| if (descriptor != null) { |
| descriptor.navigate(requestFocus); |
| } |
| } |
| |
| @Override |
| public boolean canNavigate() { |
| return PsiNavigationSupport.getInstance().canNavigate(this); |
| } |
| |
| @Override |
| public boolean canNavigateToSource() { |
| return canNavigate(); |
| } |
| |
| @Override |
| @NotNull |
| public Project getProject() { |
| final PsiManager manager = getManager(); |
| if (manager == null) { |
| throw new PsiInvalidElementAccessException(this); |
| } |
| |
| return manager.getProject(); |
| } |
| |
| //default implementations of methods from NavigationItem |
| @Override |
| public ItemPresentation getPresentation() { |
| return null; |
| } |
| |
| @Override |
| public boolean isEquivalentTo(final PsiElement another) { |
| return this == another; |
| } |
| |
| @Override |
| public PsiFile getContainingFile() { |
| final PsiElement parent = getParent(); |
| if (parent == null) throw new PsiInvalidElementAccessException(this); |
| return parent.getContainingFile(); |
| } |
| |
| @Override |
| public boolean isPhysical() { |
| final PsiElement parent = getParent(); |
| return parent != null && parent.isPhysical(); |
| } |
| |
| @Override |
| public boolean isWritable() { |
| final PsiElement parent = getParent(); |
| return parent != null && parent.isWritable(); |
| } |
| |
| @Override |
| public boolean isValid() { |
| PsiElement parent = getParent(); |
| while (parent != null && parent.getClass() == this.getClass()) { |
| parent = parent.getParent(); |
| } |
| return parent != null && parent.isValid(); |
| } |
| |
| //Q: get rid of these methods? |
| @Override |
| public boolean textMatches(@NotNull CharSequence text) { |
| return Comparing.equal(getText(), text, true); |
| } |
| |
| @Override |
| public boolean textMatches(@NotNull PsiElement element) { |
| return getText().equals(element.getText()); |
| } |
| |
| @Override |
| public void accept(@NotNull PsiElementVisitor visitor) { |
| visitor.visitElement(this); |
| } |
| |
| @Override |
| public String getName() { |
| return null; |
| } |
| |
| @NotNull |
| protected <T> T notNullChild(T child) { |
| if (child == null) { |
| LOG.error(getText() + "\n parent=" + getParent().getText()); |
| } |
| return child; |
| } |
| |
| @NotNull |
| protected <T> T[] findChildrenByClass(Class<T> aClass) { |
| List<T> result = new ArrayList<T>(); |
| for (PsiElement cur = getFirstChild(); cur != null; cur = cur.getNextSibling()) { |
| if (aClass.isInstance(cur)) result.add((T)cur); |
| } |
| return result.toArray((T[]) Array.newInstance(aClass, result.size())); |
| } |
| |
| @Nullable |
| protected <T> T findChildByClass(Class<T> aClass) { |
| for (PsiElement cur = getFirstChild(); cur != null; cur = cur.getNextSibling()) { |
| if (aClass.isInstance(cur)) return (T)cur; |
| } |
| return null; |
| } |
| |
| @NotNull |
| protected <T> T findNotNullChildByClass(Class<T> aClass) { |
| return notNullChild(findChildByClass(aClass)); |
| } |
| |
| @Override |
| public PsiManager getManager() { |
| return PsiManager.getInstance(getProject()); |
| } |
| } |