| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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; |
| |
| import org.eclipse.jface.viewers.ISelection; |
| |
| |
| /** |
| * This interface represents a textual selection. A text selection is a range of |
| * characters. Although a text selection is a snapshot taken at a particular |
| * point in time, it must not copy the line information and the selected text |
| * from the selection provider. |
| * <p> |
| * If, for example, the selection provider is a text viewer ( |
| * {@link org.eclipse.jface.text.ITextViewer}), and a text selection is created |
| * for the range [5, 10], the line formation for the 5th character must not be |
| * determined and remembered at the point of creation. It can rather be |
| * determined at the point, when <code>getStartLine</code> is called. If the |
| * source viewer range [0, 15] has been changed in the meantime between the |
| * creation of the text selection object and the invocation of |
| * <code>getStartLine</code>, the returned line number may differ from the |
| * line number of the 5th character at the point of creation of the text |
| * selection object. |
| * <p> |
| * The contract of this interface is that weak in order to allow for efficient |
| * implementations.</p> |
| * <p> |
| * Clients may implement this interface or use the default implementation |
| * provided by {@link org.eclipse.jface.text.TextSelection}.</p> |
| * |
| * @see org.eclipse.jface.text.TextSelection |
| */ |
| public interface ITextSelection extends ISelection { |
| |
| /** |
| * Returns the offset of the selected text. |
| * |
| * @return the offset of the selected text or -1 if there is no valid text information |
| */ |
| int getOffset(); |
| |
| /** |
| * Returns the length of the selected text. |
| * |
| * @return the length of the selected text or -1 if there is no valid text information |
| */ |
| int getLength(); |
| |
| /** |
| * Returns number of the line containing the offset of the selected text. |
| * If the underlying text has been changed between the creation of this |
| * selection object and the call of this method, the value returned might |
| * differ from what it would have been at the point of creation. |
| * |
| * @return the start line of this selection or -1 if there is no valid line information |
| */ |
| int getStartLine(); |
| |
| /** |
| * Returns the number of the line containing the last character of the selected text. |
| * If the underlying text has been changed between the creation of this |
| * selection object and the call of this method, the value returned might |
| * differ from what it would have been at the point of creation. |
| * |
| * @return the end line of this selection or -1 if there is no valid line information |
| */ |
| int getEndLine(); |
| |
| /** |
| * Returns the selected text. |
| * If the underlying text has been changed between the creation of this |
| * selection object and the call of this method, the value returned might |
| * differ from what it would have been at the point of creation. |
| * |
| * @return the selected text or <code>null</code> if there is no valid text information |
| */ |
| String getText(); |
| } |
| |