| package org.eclipse.ui.internal.texteditor.templates; |
| |
| import org.eclipse.jface.action.Action; |
| |
| import org.eclipse.jface.text.ITextOperationTarget; |
| import org.eclipse.jface.text.ITextViewer; |
| |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| public class TextViewerAction extends Action implements IUpdate { |
| |
| private int fOperationCode = -1; |
| private ITextOperationTarget fOperationTarget; |
| |
| /** |
| * Creates a new action. |
| * |
| * @param viewer the viewer |
| * @param operationCode the opcode |
| */ |
| public TextViewerAction(ITextViewer viewer, int operationCode) { |
| fOperationCode = operationCode; |
| fOperationTarget = viewer.getTextOperationTarget(); |
| update(); |
| } |
| |
| /** |
| * Updates the enabled state of the action. Fires a property change if the |
| * enabled state changes. |
| * |
| * @see Action#firePropertyChange(String, Object, Object) |
| */ |
| @Override |
| public void update() { |
| // XXX: workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=206111 |
| if (fOperationCode == ITextOperationTarget.UNDO || fOperationCode == ITextOperationTarget.REDO) |
| return; |
| |
| boolean wasEnabled = isEnabled(); |
| boolean isEnabled = (fOperationTarget != null && fOperationTarget.canDoOperation(fOperationCode)); |
| setEnabled(isEnabled); |
| |
| if (wasEnabled != isEnabled) { |
| firePropertyChange(ENABLED, wasEnabled ? Boolean.TRUE : Boolean.FALSE, |
| isEnabled ? Boolean.TRUE : Boolean.FALSE); |
| } |
| } |
| |
| /** |
| * @see Action#run() |
| */ |
| @Override |
| public void run() { |
| if (fOperationCode != -1 && fOperationTarget != null) { |
| fOperationTarget.doOperation(fOperationCode); |
| } |
| } |
| } |