jetbrains.jetpad.hybrid.parser.prettyprint.ParseNodes.java Source code

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Here is the source code for jetbrains.jetpad.hybrid.parser.prettyprint.ParseNodes.java

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/*
 * Copyright 2012-2016 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 jetbrains.jetpad.hybrid.parser.prettyprint;

import com.google.common.collect.Range;

public class ParseNodes {
    public static ParseNode findForRange(ParseNode root, Range<Integer> range) {
        if (!root.getRange().encloses(range))
            return null;
        for (ParseNode child : root.getChildren()) {
            ParseNode result = findForRange(child, range);
            if (result != null) {
                return result;
            }
        }
        return root;
    }

    public static ParseNode nonSameRangeParent(ParseNode node) {
        ParseNode parent = node.getParent();
        if (parent == null)
            return null;
        if (node.getRange().equals(parent.getRange())) {
            return nonSameRangeParent(parent);
        }
        return parent;
    }

    public static ParseNode nonSameRangeChild(ParseNode node, int offset) {
        Range<Integer> targetRange = Range.closed(offset, offset + 1);

        if (!node.getRange().encloses(targetRange)) {
            throw new IllegalArgumentException();
        }

        for (ParseNode child : node.getChildren()) {
            if (child.getRange().equals(node.getRange())) {
                return nonSameRangeChild(child, offset);
            }
            if (child.getRange().encloses(targetRange)) {
                return child;
            }
        }

        return null;
    }

    public static ParseNode findNodeFor(ParseNode parent, Object model) {
        if (parent.getValue() == model)
            return parent;
        for (ParseNode child : parent.getChildren()) {
            ParseNode result = findNodeFor(child, model);
            if (result != null)
                return result;
        }
        return null;
    }
}