/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.ide.ext.java.client.editor;
import com.google.inject.Inject;
import org.eclipse.che.api.promises.client.Operation;
import org.eclipse.che.api.promises.client.OperationException;
import org.eclipse.che.api.promises.client.Promise;
import org.eclipse.che.api.promises.client.PromiseError;
import org.eclipse.che.ide.api.editor.EditorAgent;
import org.eclipse.che.ide.api.editor.EditorPartPresenter;
import org.eclipse.che.ide.api.editor.texteditor.HandlesUndoRedo;
import org.eclipse.che.ide.api.editor.texteditor.TextEditor;
import org.eclipse.che.ide.api.editor.texteditor.UndoableEditor;
import org.eclipse.che.ide.ext.java.shared.dto.Change;
import org.eclipse.che.ide.api.editor.document.Document;
import org.eclipse.che.ide.api.editor.formatter.ContentFormatter;
import org.eclipse.che.ide.util.loging.Log;
import java.util.List;
/**
* ContentFormatter implementation
*
* @author Roman Nikitenko
*/
public class JavaFormatter implements ContentFormatter {
private JavaCodeAssistClient service;
private EditorAgent editorAgent;
@Inject
public JavaFormatter(JavaCodeAssistClient service,
EditorAgent editorAgent) {
this.service = service;
this.editorAgent = editorAgent;
}
@Override
public void format(final Document document) {
int offset = document.getSelectedLinearRange().getStartOffset();
int length = document.getSelectedLinearRange().getLength();
if (length <= 0 || offset < 0) {
offset = 0;
length = document.getContentsCharCount();
}
Promise<List<Change>> changesPromise = service.format(offset, length, document.getContents());
changesPromise.then(new Operation<List<Change>>() {
@Override
public void apply(List<Change> changes) throws OperationException {
applyChanges(changes, document);
}
}).catchError(new Operation<PromiseError>() {
@Override
public void apply(PromiseError arg) throws OperationException {
Log.error(getClass(), arg.getCause());
}
});
}
@Override
public void install(TextEditor editor) {
// does nothing by default
}
private void applyChanges(List<Change> changes, Document document) {
HandlesUndoRedo undoRedo = null;
EditorPartPresenter editorPartPresenter = editorAgent.getActiveEditor();
if (editorPartPresenter instanceof UndoableEditor) {
undoRedo = ((UndoableEditor)editorPartPresenter).getUndoRedo();
}
try {
if (undoRedo != null) {
undoRedo.beginCompoundChange();
}
for (Change change : changes) {
document.replace(change.getOffset(), change.getLength(), change.getText());
}
} catch (final Exception e) {
Log.error(getClass(), e);
} finally {
if (undoRedo != null) {
undoRedo.endCompoundChange();
}
}
}
}