| /******************************************************************************* |
| * Copyright (c) 2004, 2016 IBM Corporation and others. |
| * All rights reserved. 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 |
| * Angelo Zerr <angelo.zerr@gmail.com> - copied from org.eclipse.wst.css.core.format.FormatProcessorCSS |
| * modified in order to process JSON Objects. |
| *******************************************************************************/ |
| package org.eclipse.wst.json.core.format; |
| |
| import org.eclipse.jface.text.DocumentRewriteSession; |
| import org.eclipse.jface.text.DocumentRewriteSessionType; |
| import org.eclipse.jface.text.IDocumentExtension4; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.wst.json.core.document.IJSONDocument; |
| import org.eclipse.wst.json.core.document.IJSONModel; |
| import org.eclipse.wst.json.core.document.IJSONPair; |
| import org.eclipse.wst.json.core.internal.format.IJSONSourceFormatter; |
| import org.eclipse.wst.json.core.internal.format.JSONFormatUtil; |
| import org.eclipse.wst.json.core.internal.format.JSONSourceFormatterFactory; |
| import org.eclipse.wst.json.core.regions.JSONRegionContexts; |
| import org.eclipse.wst.sse.core.internal.format.AbstractStructuredFormatProcessor; |
| import org.eclipse.wst.sse.core.internal.format.IStructuredFormatPreferences; |
| import org.eclipse.wst.sse.core.internal.format.IStructuredFormatter; |
| import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel; |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; |
| import org.w3c.dom.Node; |
| |
| /** |
| * Format processor for JSON. |
| * |
| */ |
| public class FormatProcessorJSON extends AbstractStructuredFormatProcessor { |
| /* |
| * Max length of text to be formatted to be considered a "small change" Used |
| * for document rewrite session type. |
| */ |
| private final int MAX_SMALL_FORMAT_SIZE = 1000; |
| |
| @Override |
| protected String getFileExtension() { |
| return "json"; //$NON-NLS-1$ |
| } |
| |
| @Override |
| public void formatModel(IStructuredModel structuredModel, int start, |
| int length) { |
| JSONFormatUtil formatUtil = JSONFormatUtil.getInstance(); |
| if (structuredModel instanceof IJSONModel) { |
| // BUG102822 take advantage of IDocumentExtension4 |
| IDocumentExtension4 docExt4 = null; |
| if (structuredModel.getStructuredDocument() instanceof IDocumentExtension4) { |
| docExt4 = (IDocumentExtension4) structuredModel |
| .getStructuredDocument(); |
| } |
| DocumentRewriteSession rewriteSession = null; |
| |
| try { |
| DocumentRewriteSessionType rewriteType = (length > MAX_SMALL_FORMAT_SIZE) ? DocumentRewriteSessionType.UNRESTRICTED |
| : DocumentRewriteSessionType.UNRESTRICTED_SMALL; |
| rewriteSession = (docExt4 == null || docExt4 |
| .getActiveRewriteSession() != null) ? null : docExt4 |
| .startRewriteSession(rewriteType); |
| |
| IJSONDocument doc = ((IJSONModel) structuredModel) |
| .getDocument(); |
| IndexedRegion startRegion = ((IJSONModel) structuredModel).getIndexedRegion(start); |
| IndexedRegion endRegion = ((IJSONModel) structuredModel).getIndexedRegion(start + length); |
| if (startRegion != null && endRegion != null) { |
| start = startRegion.getStartOffset(); |
| int offset; |
| if (endRegion instanceof IJSONPair) { |
| offset = endRegion.getEndOffset(); |
| IStructuredDocumentRegion nextRegion = structuredModel.getStructuredDocument() |
| .getRegionAtCharacterOffset(offset + 1); |
| if (nextRegion.getType() == JSONRegionContexts.JSON_COMMA) { |
| offset = nextRegion.getEndOffset(); |
| } |
| } else { |
| offset = endRegion.getEndOffset(); |
| } |
| int end = offset - start; |
| IJSONSourceFormatter formatter = JSONSourceFormatterFactory |
| .getInstance().getSourceFormatter( |
| doc); |
| StringBuilder buf = formatter.format(doc, new Region(start, end)); |
| if (buf != null) { |
| formatUtil.replaceSource(doc.getModel(), start, end, buf.toString()); |
| } |
| } |
| } finally { |
| // BUG102822 take advantage of IDocumentExtension4 |
| if (docExt4 != null && rewriteSession != null) |
| docExt4.stopRewriteSession(rewriteSession); |
| } |
| } |
| } |
| |
| public IStructuredFormatPreferences getFormatPreferences() { |
| return null; |
| } |
| |
| @Override |
| protected IStructuredFormatter getFormatter(Node node) { |
| return null; |
| } |
| |
| @Override |
| protected void refreshFormatPreferences() { |
| } |
| } |