| /******************************************************************************* |
| * Copyright (c) 2018 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 |
| * Red Hat Inc. - created from CUCorrectionProposal |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.manipulation; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.NullProgressMonitor; |
| |
| import org.eclipse.text.edits.MultiTextEdit; |
| import org.eclipse.text.edits.TextEdit; |
| |
| import org.eclipse.jface.text.Document; |
| import org.eclipse.jface.text.IDocument; |
| |
| import org.eclipse.ltk.core.refactoring.Change; |
| import org.eclipse.ltk.core.refactoring.DocumentChange; |
| import org.eclipse.ltk.core.refactoring.TextChange; |
| import org.eclipse.ltk.core.refactoring.TextFileChange; |
| |
| import org.eclipse.jdt.core.ICompilationUnit; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.refactoring.CompilationUnitChange; |
| |
| import org.eclipse.jdt.internal.core.manipulation.JavaManipulationPlugin; |
| import org.eclipse.jdt.internal.core.manipulation.StubUtility; |
| |
| import org.eclipse.jdt.internal.ui.text.correction.proposals.EditAnnotator; |
| |
| /** |
| * A proposal for quick fixes and quick assists that work on a single compilation unit. Either a |
| * {@link TextChange text change} is directly passed in the constructor or method |
| * {@link #addEdits(IDocument, TextEdit)} is overridden to provide the text edits that are applied |
| * to the document when the proposal is evaluated. |
| * <p> |
| * The proposal takes care of the preview of the changes as proposal information. |
| * </p> |
| * |
| * @since 1.11 |
| */ |
| public class CUCorrectionProposalCore extends ChangeCorrectionProposalCore implements ICUCorrectionProposal { |
| |
| private ICompilationUnit fCompilationUnit; |
| private ICUCorrectionProposal fCUProposal; |
| |
| /** |
| * Constructs a correction proposal working on a compilation unit with a given text change. |
| * |
| * @param proposal ICUCorrectionProposal to use |
| * @param name the name that is displayed in the proposal selection dialog |
| * @param cu the compilation unit to which the change can be applied |
| * @param change the change that is executed when the proposal is applied or <code>null</code> |
| * if implementors override {@link #addEdits(IDocument, TextEdit)} to provide the |
| * text edits or {@link #createTextChange()} to provide a text change |
| * @param relevance the relevance of this proposal |
| */ |
| public CUCorrectionProposalCore(ICUCorrectionProposal proposal, String name, ICompilationUnit cu, TextChange change, int relevance) { |
| super(name, change, relevance); |
| if (cu == null) { |
| throw new IllegalArgumentException("Compilation unit must not be null"); //$NON-NLS-1$ |
| } |
| fCompilationUnit= cu; |
| fCUProposal= proposal; |
| } |
| |
| /** |
| * Constructs a correction proposal working on a compilation unit with a given text change. |
| * |
| * @param name the name that is displayed in the proposal selection dialog |
| * @param cu the compilation unit to which the change can be applied |
| * @param change the change that is executed when the proposal is applied or <code>null</code> |
| * if implementors override {@link #addEdits(IDocument, TextEdit)} to provide the |
| * text edits or {@link #createTextChange()} to provide a text change |
| * @param relevance the relevance of this proposal |
| */ |
| public CUCorrectionProposalCore(String name, ICompilationUnit cu, TextChange change, int relevance) { |
| super(name, change, relevance); |
| if (cu == null) { |
| throw new IllegalArgumentException("Compilation unit must not be null"); //$NON-NLS-1$ |
| } |
| fCompilationUnit= cu; |
| fCUProposal= this; |
| } |
| |
| /** |
| * Constructs a correction proposal working on a compilation unit. |
| * <p> |
| * Users have to override {@link #addEdits(IDocument, TextEdit)} to provide the text edits or |
| * {@link #createTextChange()} to provide a text change. |
| * </p> |
| * |
| * @param name the name that is displayed in the proposal selection dialog |
| * @param cu the compilation unit on that the change works |
| * @param relevance the relevance of this proposal |
| */ |
| protected CUCorrectionProposalCore(String name, ICompilationUnit cu, int relevance) { |
| this(name, cu, null, relevance); |
| } |
| |
| /** |
| * Called when the {@link CompilationUnitChange} is initialized. Subclasses can override to add |
| * text edits to the root edit of the change. Implementors must not access the proposal, e.g. |
| * not call {@link #getChange()}. |
| * <p> |
| * The default implementation does not add any edits |
| * </p> |
| * |
| * @param document content of the underlying compilation unit. To be accessed read only. |
| * @param editRoot The root edit to add all edits to |
| * @throws CoreException can be thrown if adding the edits is failing. |
| */ |
| protected void addEdits(IDocument document, TextEdit editRoot) throws CoreException { |
| // empty default implementation |
| } |
| |
| @Override |
| public Object getAdditionalProposalInfo(IProgressMonitor monitor) { |
| StringBuffer buf= new StringBuffer(); |
| try { |
| TextChange change= fCUProposal.getTextChange(); |
| change.setKeepPreviewEdits(true); |
| IDocument previewDocument= change.getPreviewDocument(monitor); |
| TextEdit rootEdit= change.getPreviewEdit(change.getEdit()); |
| EditAnnotator ea= new EditAnnotator(buf, previewDocument); |
| rootEdit.accept(ea); |
| ea.unchangedUntil(previewDocument.getLength()); // Final pre-existing region |
| } catch (CoreException e) { |
| JavaManipulationPlugin.log(e); |
| } |
| return buf.toString(); |
| } |
| |
| @Override |
| public void apply() throws CoreException { |
| performChange(); |
| } |
| |
| public TextChange getNewChange() { |
| ICompilationUnit cu= getCompilationUnit(); |
| String name= getName(); |
| TextChange change; |
| if (!cu.getResource().exists()) { |
| String source; |
| try { |
| source= cu.getSource(); |
| } catch (JavaModelException e) { |
| JavaManipulationPlugin.log(e); |
| source= ""; // empty //$NON-NLS-1$ |
| } |
| Document document= new Document(source); |
| document.setInitialLineDelimiter(StubUtility.getLineDelimiterUsed(cu)); |
| change= new DocumentChange(name, document); |
| } else { |
| CompilationUnitChange cuChange = new CompilationUnitChange(name, cu); |
| cuChange.setSaveMode(TextFileChange.LEAVE_DIRTY); |
| change= cuChange; |
| } |
| TextEdit rootEdit= new MultiTextEdit(); |
| change.setEdit(rootEdit); |
| return change; |
| } |
| |
| /** |
| * Creates the text change for this proposal. |
| * This method is only called once and only when no text change has been passed in |
| * {see #CUCorrectionProposal(String, ICompilationUnit, TextChange, int, Image)}. |
| * |
| * @return the created text change |
| * @throws CoreException if the creation of the text change failed |
| */ |
| public TextChange createTextChange() throws CoreException { |
| TextChange change = getNewChange(); |
| // initialize text change |
| IDocument document= change.getCurrentDocument(new NullProgressMonitor()); |
| addEdits(document, change.getEdit()); |
| return change; |
| } |
| |
| |
| @Override |
| protected Change createChange() throws CoreException { |
| return createTextChange(); // make sure that only text changes are allowed here |
| } |
| |
| /** |
| * Returns the text change that is invoked when the change is applied. |
| * |
| * @return the text change that is invoked when the change is applied |
| * @throws CoreException if accessing the change failed |
| */ |
| @Override |
| public final TextChange getTextChange() throws CoreException { |
| return (TextChange) getChange(); |
| } |
| |
| /** |
| * The compilation unit on which the change works. |
| * |
| * @return the compilation unit on which the change works |
| */ |
| public ICompilationUnit getCompilationUnit() { |
| return fCompilationUnit; |
| } |
| |
| /** |
| * Creates a preview of the content of the compilation unit after applying the change. |
| * |
| * @return the preview of the changed compilation unit |
| * @throws CoreException if the creation of the change failed |
| * |
| * @noreference This method is not intended to be referenced by clients. |
| */ |
| public String getPreviewContent() throws CoreException { |
| return getTextChange().getPreviewContent(new NullProgressMonitor()); |
| } |
| |
| @Override |
| public String toString() { |
| try { |
| return getPreviewContent(); |
| } catch (CoreException e) { |
| // didn't work out |
| } |
| return super.toString(); |
| } |
| |
| } |