| /******************************************************************************* |
| * Copyright (c) 2006, 2015 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.core.dom.lrparser.action; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.cdt.core.dom.ast.IASTCompletionNode; |
| import org.eclipse.cdt.core.dom.ast.IASTName; |
| import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit; |
| |
| /** |
| * An AST node that represents the location of content assist |
| * in the source file. |
| * |
| * This node may contain the prefix text of an identifier up to the point. If |
| * there is no prefix, the completion occurred at the point where a new token |
| * would have begun. |
| * |
| * Contains a list of name nodes, each name represents an identifier |
| * at the point where content assist was invoked. There is usually |
| * a single name node, however if an ambiguity is detected then that section |
| * of the source may be interpreted in more than one way (for example, as an expression then as a declaration). |
| * This results in an ambiguity node in the tree and one name node for each of the ways it can be interpreted. |
| * |
| * The full AST may be accessed via getTranslationUnit() or by following |
| * the parent pointers of the name nodes. |
| * |
| * @author Mike Kucera |
| */ |
| public class ASTCompletionNode implements IASTCompletionNode { |
| |
| private final List<CompletionNameEntry> entries = new ArrayList<>(); |
| |
| private final String prefix; |
| private IASTTranslationUnit tu; |
| |
| /** |
| * Creates a completion node. |
| * @param prefix The completion prefix, set to null if the empty string is passed. |
| */ |
| public ASTCompletionNode(String prefix, IASTTranslationUnit tu) { |
| if ("".equals(prefix)) //$NON-NLS-1$ |
| prefix = null; |
| |
| this.prefix = prefix; |
| this.tu = tu; |
| } |
| |
| public ASTCompletionNode(String prefix) { |
| this(prefix, null); |
| } |
| |
| public void addName(IASTName name) { |
| entries.add(new CompletionNameEntry(name, name.getParent())); |
| } |
| |
| /** |
| * Returns the length of the prefix. |
| */ |
| @Override |
| public int getLength() { |
| return prefix == null ? 0 : prefix.length(); |
| } |
| |
| @Override |
| public IASTName[] getNames() { |
| IASTName[] names = new IASTName[entries.size()]; |
| for (int i = 0; i < entries.size(); ++i) { |
| names[i] = entries.get(i).fName; |
| } |
| return names; |
| } |
| |
| /** |
| * If the point of completion was at the end of a potential identifier, this |
| * string contains the text of that identifier. |
| * |
| * @returns a string of length >= 1 or null |
| */ |
| @Override |
| public String getPrefix() { |
| return prefix; |
| } |
| |
| public void setTranslationUnit(IASTTranslationUnit tu) { |
| this.tu = tu; |
| } |
| |
| @Override |
| public IASTTranslationUnit getTranslationUnit() { |
| return tu; |
| } |
| |
| @Override |
| public boolean containsName(IASTName name) { |
| for (CompletionNameEntry entry : entries) { |
| if (entry.fName == name) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public CompletionNameEntry[] getEntries() { |
| return entries.toArray(new CompletionNameEntry[entries.size()]); |
| } |
| } |