/*
* 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.source.tree;
import com.intellij.lang.ASTFactory;
import com.intellij.lang.ASTNode;
import com.intellij.lang.LighterAST;
import com.intellij.lang.LighterASTNode;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.intellij.psi.impl.PsiImplUtil;
import com.intellij.psi.impl.source.DummyHolder;
import com.intellij.psi.impl.source.SourceJavaCodeReference;
import com.intellij.psi.impl.source.SourceTreeToPsiMap;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.TokenSet;
import com.intellij.util.CharTable;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
public class JavaSourceUtil {
private static final Logger LOG = Logger.getInstance("#com.intellij.psi.impl.source.tree.JavaSourceUtil");
private static final TokenSet REF_FILTER = TokenSet.orSet(
ElementType.JAVA_COMMENT_OR_WHITESPACE_BIT_SET, TokenSet.create(JavaElementType.ANNOTATION));
private JavaSourceUtil() { }
public static void fullyQualifyReference(@NotNull CompositeElement reference, @NotNull PsiClass targetClass) {
if (((SourceJavaCodeReference)reference).isQualified()) { // qualified reference
final PsiClass parentClass = targetClass.getContainingClass();
if (parentClass == null) return;
final ASTNode qualifier = reference.findChildByRole(ChildRole.QUALIFIER);
if (qualifier instanceof SourceJavaCodeReference) {
((SourceJavaCodeReference)qualifier).fullyQualify(parentClass);
}
}
else { // unqualified reference, need to qualify with package name
final String qName = targetClass.getQualifiedName();
if (qName == null) {
return; // todo: local classes?
}
final int i = qName.lastIndexOf('.');
if (i > 0) {
final String prefix = qName.substring(0, i);
final PsiManager manager = reference.getManager();
final PsiJavaParserFacade parserFacade = JavaPsiFacade.getInstance(manager.getProject()).getParserFacade();
final TreeElement qualifier;
if (reference instanceof PsiReferenceExpression) {
qualifier = (TreeElement)parserFacade.createExpressionFromText(prefix, null).getNode();
}
else {
qualifier = (TreeElement)parserFacade.createReferenceFromText(prefix, null).getNode();
}
if (qualifier != null) {
final CharTable systemCharTab = SharedImplUtil.findCharTableByTree(qualifier);
final LeafElement dot = Factory.createSingleLeafElement(JavaTokenType.DOT, ".", 0, 1, systemCharTab, manager);
qualifier.rawInsertAfterMe(dot);
reference.addInternal(qualifier, dot, null, Boolean.FALSE);
}
}
}
}
@NotNull
public static String getReferenceText(@NotNull PsiJavaCodeReferenceElement ref) {
final StringBuilder buffer = new StringBuilder();
((TreeElement)ref.getNode()).acceptTree(new RecursiveTreeElementWalkingVisitor() {
@Override
public void visitLeaf(LeafElement leaf) {
if (!REF_FILTER.contains(leaf.getElementType())) {
String leafText = leaf.getText();
if (buffer.length() > 0 && !leafText.isEmpty() && Character.isJavaIdentifierPart(leafText.charAt(0))) {
char lastInBuffer = buffer.charAt(buffer.length() - 1);
if (lastInBuffer == '?' || Character.isJavaIdentifierPart(lastInBuffer)) {
buffer.append(" ");
}
}
buffer.append(leafText);
}
}
@Override
public void visitComposite(CompositeElement composite) {
if (!REF_FILTER.contains(composite.getElementType())) {
super.visitComposite(composite);
}
}
});
return buffer.toString();
}
@NotNull
public static String getReferenceText(@NotNull LighterAST tree, @NotNull LighterASTNode node) {
return LightTreeUtil.toFilteredString(tree, node, REF_FILTER);
}
public static TreeElement addParenthToReplacedChild(@NotNull IElementType parenthType,
@NotNull TreeElement newChild,
@NotNull PsiManager manager) {
CompositeElement parenthExpr = ASTFactory.composite(parenthType);
TreeElement dummyExpr = (TreeElement)newChild.clone();
final CharTable charTableByTree = SharedImplUtil.findCharTableByTree(newChild);
new DummyHolder(manager, parenthExpr, null, charTableByTree);
parenthExpr.putUserData(CharTable.CHAR_TABLE_KEY, charTableByTree);
parenthExpr.rawAddChildren(ASTFactory.leaf(JavaTokenType.LPARENTH, "("));
parenthExpr.rawAddChildren(dummyExpr);
parenthExpr.rawAddChildren(ASTFactory.leaf(JavaTokenType.RPARENTH, ")"));
try {
CodeStyleManager codeStyleManager = CodeStyleManager.getInstance(manager.getProject());
PsiElement formatted = codeStyleManager.reformat(SourceTreeToPsiMap.treeToPsiNotNull(parenthExpr));
parenthExpr = (CompositeElement)SourceTreeToPsiMap.psiToTreeNotNull(formatted);
}
catch (IncorrectOperationException e) {
LOG.error(e); // should not happen
}
newChild.putUserData(CharTable.CHAR_TABLE_KEY, SharedImplUtil.findCharTableByTree(newChild));
dummyExpr.getTreeParent().replaceChild(dummyExpr, newChild);
// TODO remove explicit caches drop since this should be ok if we will use ChangeUtil for the modification
TreeUtil.clearCaches(TreeUtil.getFileElement(parenthExpr));
return parenthExpr;
}
public static void deleteSeparatingComma(@NotNull CompositeElement element, @NotNull ASTNode child) {
assert child.getElementType() != JavaTokenType.COMMA : child;
ASTNode next = PsiImplUtil.skipWhitespaceAndComments(child.getTreeNext());
if (next != null && next.getElementType() == JavaTokenType.COMMA) {
element.deleteChildInternal(next);
}
else {
ASTNode prev = PsiImplUtil.skipWhitespaceAndCommentsBack(child.getTreePrev());
if (prev != null && prev.getElementType() == JavaTokenType.COMMA) {
element.deleteChildInternal(prev);
}
}
}
public static void addSeparatingComma(@NotNull CompositeElement element, @NotNull ASTNode child, @NotNull TokenSet listTypes) {
assert child.getElementType() != JavaTokenType.COMMA : child;
scanChildren(element, child, listTypes, true);
scanChildren(element, child, listTypes, false);
}
private static void scanChildren(CompositeElement element, ASTNode node, TokenSet listTypes, boolean forward) {
ASTNode child = node;
while (true) {
child = (forward ? child.getTreeNext() : child.getTreePrev());
if (child == null || child.getElementType() == JavaTokenType.COMMA) break;
if (listTypes.contains(child.getElementType())) {
CharTable charTable = SharedImplUtil.findCharTableByTree(element);
PsiManager manager = element.getPsi().getManager();
TreeElement comma = Factory.createSingleLeafElement(JavaTokenType.COMMA, ",", 0, 1, charTable, manager);
element.addInternal(comma, comma, (forward ? node : child), Boolean.FALSE);
break;
}
}
}
}