| /******************************************************************************* |
| * Copyright (c) 2008, 2017 xored software, Inc. and others. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * xored software, Inc. - initial API and Implementation (Alex Panchenko) |
| *******************************************************************************/ |
| package org.eclipse.dltk.formatter; |
| |
| import java.util.Stack; |
| |
| public class AbstractFormatterNodeBuilder { |
| |
| private final Stack<IFormatterContainerNode> stack = new Stack<>(); |
| |
| protected void start(IFormatterContainerNode root) { |
| stack.clear(); |
| stack.push(root); |
| } |
| |
| protected IFormatterContainerNode peek() { |
| return stack.peek(); |
| } |
| |
| protected void push(IFormatterContainerNode node) { |
| addChild(node); |
| stack.push(node); |
| } |
| |
| protected IFormatterNode addChild(IFormatterNode node) { |
| IFormatterContainerNode parentNode = peek(); |
| if (!node.isEmpty()) { |
| advanceParent(parentNode, node.getStartOffset()); |
| } |
| parentNode.addChild(node); |
| return node; |
| } |
| |
| private void advanceParent(IFormatterContainerNode parentNode, |
| final int pos) { |
| if (parentNode.getEndOffset() < pos) { |
| parentNode.addChild(createTextNode(parentNode.getDocument(), |
| parentNode.getEndOffset(), pos)); |
| } |
| } |
| |
| protected void checkedPop(IFormatterContainerNode expected, int bodyEnd) { |
| IFormatterContainerNode top = stack.pop(); |
| if (top instanceof IFormatterNodeProxy) { |
| final IFormatterNode target = ((IFormatterNodeProxy) top) |
| .getTargetNode(); |
| if (target instanceof IFormatterContainerNode) { |
| top = (IFormatterContainerNode) target; |
| } |
| } |
| if (top != expected) { |
| throw new IllegalStateException(); |
| } |
| if (bodyEnd > 0 && expected.getEndOffset() < bodyEnd) { |
| expected.addChild(createTextNode(expected.getDocument(), |
| expected.getEndOffset(), bodyEnd)); |
| } |
| } |
| |
| /** |
| * @return |
| */ |
| protected IFormatterTextNode createTextNode(IFormatterDocument document, |
| int startIndex, int endIndex) { |
| return new FormatterTextNode(document, startIndex, endIndex); |
| } |
| } |