| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.jface.text; |
| |
| |
| /** |
| * Implemented by tools supporting the editing process. |
| * <p> |
| * Clients may ask an <code>IEditingSupport</code> whether it is currently |
| * displaying a shell that has focus, and whether it is the origin of a document |
| * event. Depending on the answers to these queries, clients may decide to react |
| * differently to incoming notifications about events. For example, a special |
| * editing mode, that usually deactivates when the main shell looses focus, may |
| * decide to not deactivate if the focus event was triggered by an |
| * <code>IEditingSupport</code>. |
| * </p> |
| * <p> |
| * Clients may implement this interface. |
| * </p> |
| * |
| * @see IEditingSupportRegistry |
| * @since 3.1 |
| */ |
| public interface IEditingSupport { |
| /** |
| * Returns <code>true</code> if the receiver is the originator of a |
| * <code>DocumentEvent</code> and if that <code>event</code> is related |
| * to <code>subjectRegion</code>. |
| * <p> |
| * The relationship between <code>event</code> and |
| * <code>subjectRegion</code> is not always obvious. Often, the main |
| * editing area being monitored by the caller will be at |
| * <code>subjectRegion</code>, when the receiver modifies the underlying |
| * document at a different location without wanting to interrupt the normal |
| * typing flow of the user. |
| * </p> |
| * <p> |
| * An example would be an editor that automatically increments the section |
| * number of the next section when the user typed in a new section title. In |
| * this example, the subject region is the current typing location, while |
| * the increment results in a document change further down in the text. |
| * </p> |
| * |
| * @param event the <code>DocumentEvent</code> in question |
| * @param subjectRegion the region that the caller is interested in |
| * @return <code>true</code> if <code>event</code> was triggered by the |
| * receiver and relates to <code>subjectRegion</code> |
| */ |
| boolean isOriginator(DocumentEvent event, IRegion subjectRegion); |
| |
| /** |
| * Returns <code>true</code> if the receiver is showing a shell which has |
| * focus, <code>false</code> if it does not have focus or the helper has |
| * no shell. |
| * |
| * @return <code>true</code> if the support's shell has focus, |
| * <code>false</code> otherwise |
| */ |
| boolean ownsFocusShell(); |
| } |