/*
* Copyright 2010-2016 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 org.jetbrains.kotlin.idea.formatter;
import com.intellij.formatting.Indent;
import com.intellij.lang.ASTNode;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.tree.TokenSet;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
@SuppressWarnings("UnusedDeclaration")
public abstract class NodeIndentStrategy {
public static NodeIndentStrategy constIndent(Indent indent) {
return new ConstIndentStrategy(indent);
}
public static PositionStrategy strategy(@Nullable String debugInfo) {
return new PositionStrategy(debugInfo);
}
@Nullable
public abstract Indent getIndent(@NotNull ASTNode node);
public static class ConstIndentStrategy extends NodeIndentStrategy {
private final Indent indent;
public ConstIndentStrategy(Indent indent) {
this.indent = indent;
}
@Nullable
@Override
public Indent getIndent(@NotNull ASTNode node) {
return indent;
}
}
public static class PositionStrategy extends NodeIndentStrategy {
private Indent defaultIndent = Indent.getNoneIndent();
private final List<IElementType> in = new ArrayList<IElementType>();
private final List<IElementType> notIn = new ArrayList<IElementType>();
private final List<IElementType> forElement = new ArrayList<IElementType>();
private final List<IElementType> notForElement = new ArrayList<IElementType>();
private final String debugInfo;
public PositionStrategy(@Nullable String debugInfo) {
this.debugInfo = debugInfo;
}
@Override
public String toString() {
return "PositionStrategy " + (debugInfo != null ? debugInfo : "No debug info");
}
public PositionStrategy set(Indent indent) {
defaultIndent = indent;
return this;
}
public PositionStrategy in(@NotNull TokenSet parents) {
IElementType[] types = parents.getTypes();
if (types.length == 0) {
throw new IllegalArgumentException("Empty token set is unexpected");
}
fillTypes(in, types[0], Arrays.copyOfRange(types, 1, types.length));
return this;
}
public PositionStrategy in(@NotNull IElementType parentType, @NotNull IElementType... orParentTypes) {
fillTypes(in, parentType, orParentTypes);
return this;
}
public PositionStrategy notIn(@NotNull IElementType parentType, @NotNull IElementType... orParentTypes) {
fillTypes(notIn, parentType, orParentTypes);
return this;
}
public PositionStrategy inAny() {
in.clear();
notIn.clear();
return this;
}
public PositionStrategy forType(@NotNull IElementType elementType, @NotNull IElementType... otherTypes) {
fillTypes(forElement, elementType, otherTypes);
return this;
}
public PositionStrategy notForType(@NotNull IElementType elementType, @NotNull IElementType... otherTypes) {
fillTypes(notForElement, elementType, otherTypes);
return this;
}
public PositionStrategy forAny() {
forElement.clear();
notForElement.clear();
return this;
}
@Nullable
@Override
public Indent getIndent(@NotNull ASTNode node) {
if (!forElement.isEmpty()) {
if (!forElement.contains(node.getElementType())) {
return null;
}
}
if (notForElement.contains(node.getElementType())) {
return null;
}
ASTNode parent = node.getTreeParent();
if (parent != null) {
if (!in.isEmpty()) {
if (!in.contains(parent.getElementType())) {
return null;
}
}
if (notIn.contains(parent.getElementType())) {
return null;
}
}
else {
if (!in.isEmpty()) {
return null;
}
}
return defaultIndent;
}
private static void fillTypes(List<IElementType> resultCollection, IElementType singleType, IElementType[] otherTypes) {
resultCollection.clear();
resultCollection.add(singleType);
Collections.addAll(resultCollection, otherTypes);
}
}
}