| /******************************************************************************* |
| * Copyright (c) 2000, 2016 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.jdt.internal.ui.text.correction; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.text.source.ISourceViewer; |
| import org.eclipse.jface.text.source.TextInvocationContext; |
| |
| import org.eclipse.ui.IEditorPart; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.dom.ASTNode; |
| import org.eclipse.jdt.core.dom.CompilationUnit; |
| import org.eclipse.jdt.core.dom.NodeFinder; |
| import org.eclipse.jdt.core.manipulation.SharedASTProviderCore; |
| |
| import org.eclipse.jdt.internal.core.manipulation.dom.ASTResolving; |
| |
| import org.eclipse.jdt.ui.text.java.IInvocationContext; |
| |
| |
| public class AssistContext extends TextInvocationContext implements IInvocationContext { |
| |
| private final ICompilationUnit fCompilationUnit; |
| private final IEditorPart fEditor; |
| |
| private CompilationUnit fASTRoot; |
| private final SharedASTProviderCore.WAIT_FLAG fWaitFlag; |
| /** |
| * The cached node finder, can be null. |
| * @since 3.6 |
| */ |
| private NodeFinder fNodeFinder; |
| |
| |
| /* |
| * @since 3.5 |
| */ |
| private AssistContext(ICompilationUnit cu, ISourceViewer sourceViewer, IEditorPart editor, int offset, int length, SharedASTProviderCore.WAIT_FLAG waitFlag) { |
| super(sourceViewer, offset, length); |
| Assert.isLegal(cu != null); |
| Assert.isLegal(waitFlag != null); |
| fCompilationUnit= cu; |
| fEditor= editor; |
| fWaitFlag= waitFlag; |
| } |
| |
| /* |
| * @since 3.5 |
| */ |
| public AssistContext(ICompilationUnit cu, ISourceViewer sourceViewer, int offset, int length, SharedASTProviderCore.WAIT_FLAG waitFlag) { |
| this(cu, sourceViewer, null, offset, length, waitFlag); |
| } |
| |
| /* |
| * @since 3.5 |
| */ |
| public AssistContext(ICompilationUnit cu, ISourceViewer sourceViewer, IEditorPart editor, int offset, int length) { |
| this(cu, sourceViewer, editor, offset, length, SharedASTProviderCore.WAIT_YES); |
| } |
| |
| /* |
| * Constructor for CorrectionContext. |
| * @since 3.4 |
| */ |
| public AssistContext(ICompilationUnit cu, ISourceViewer sourceViewer, int offset, int length) { |
| this(cu, sourceViewer, null, offset, length); |
| } |
| |
| /* |
| * Constructor for CorrectionContext. |
| */ |
| public AssistContext(ICompilationUnit cu, int offset, int length) { |
| this(cu, null, offset, length); |
| } |
| |
| /** |
| * Returns the compilation unit. |
| * @return an <code>ICompilationUnit</code> |
| */ |
| @Override |
| public ICompilationUnit getCompilationUnit() { |
| return fCompilationUnit; |
| } |
| |
| /** |
| * Returns the editor or <code>null</code> if none. |
| * @return an <code>IEditorPart</code> or <code>null</code> if none |
| * @since 3.5 |
| */ |
| public IEditorPart getEditor() { |
| return fEditor; |
| } |
| |
| /** |
| * Returns the length. |
| * @return int |
| */ |
| @Override |
| public int getSelectionLength() { |
| return Math.max(getLength(), 0); |
| } |
| |
| /** |
| * Returns the offset. |
| * @return int |
| */ |
| @Override |
| public int getSelectionOffset() { |
| return getOffset(); |
| } |
| |
| @Override |
| public CompilationUnit getASTRoot() { |
| if (fASTRoot == null) { |
| fASTRoot= SharedASTProviderCore.getAST(fCompilationUnit, fWaitFlag, null); |
| if (fASTRoot == null) { |
| // see bug 63554 |
| fASTRoot= ASTResolving.createQuickFixAST(fCompilationUnit, null); |
| } |
| } |
| return fASTRoot; |
| } |
| |
| |
| /** |
| * @param root The ASTRoot to set. |
| */ |
| public void setASTRoot(CompilationUnit root) { |
| fASTRoot= root; |
| } |
| |
| @Override |
| public ASTNode getCoveringNode() { |
| if (fNodeFinder == null) { |
| fNodeFinder= new NodeFinder(getASTRoot(), getOffset(), getLength()); |
| } |
| return fNodeFinder.getCoveringNode(); |
| } |
| |
| @Override |
| public ASTNode getCoveredNode() { |
| if (fNodeFinder == null) { |
| fNodeFinder= new NodeFinder(getASTRoot(), getOffset(), getLength()); |
| } |
| return fNodeFinder.getCoveredNode(); |
| } |
| |
| } |