Java IOperationHistory.undo方法代码示例

import org.eclipse.core.commands.operations.IOperationHistory; //导入方法依赖的package包/类
public void assertDeleteConstraint(PeriodicTemporalConstraint constraint, Timepoint timepoint) {
	TemporalBoundColumn column = new TemporalBoundColumn(TEST_PROVIDER, timepoint);
	EActivity a = constructBoundedActivity(constraint);
	ConstraintsMember originalFacet = column.getFacet(a);
	String originalText = column.getText(originalFacet);
	column.modify(originalFacet, "", undoContext);
	
	ConstraintsMember constraintsMember = a.getMember(ConstraintsMember.class, true);
	List<PeriodicTemporalConstraint> bounds = constraintsMember.getPeriodicTemporalConstraints();
	assertEquals("Number mismatch in bounds count after editing", 0, bounds.size());
	ConstraintsMember changedFacet = column.getFacet(a);
	assertEquals("Column text not equal", column.getText(changedFacet), "");
	
	try {
		IOperationHistory history = OperationHistoryFactory.getOperationHistory();
		history.undo(undoContext, null, null);
	} catch (Exception e) {
		fail(e.getMessage());
	}
	
	ConstraintsMember finalFacet = column.getFacet(a);
	assertEquals("Error in undo operation", originalText, column.getText(finalFacet));
}
 

import org.eclipse.core.commands.operations.IOperationHistory; //导入方法依赖的package包/类
/**
 * Undo the given operation, which should be the next operation in the undo context.
 * Tests that the operation can be undone, that it is the next in the undo context,
 * that the undo result isOK() and that no ExecutionException is thrown.
 * @param operation
 * @param undoContext
 * @param undoingRedo supply true if undoing a redo, to get a different error string during failure
 */
public static final void undoOperation(IUndoableOperation operation, IUndoContext undoContext, boolean undoingRedo) {
	TestCase.assertTrue(operation.canUndo());
	String string = "failed to undo" + (undoingRedo ? " the redo" : "");
	try {
		IOperationHistory history = OperationHistoryFactory.getOperationHistory();
		TestCase.assertSame("the supplied operation should be next on the undo stack", operation, history.getUndoOperation(undoContext));
		IStatus result = history.undo(undoContext, null, null);
		TestCase.assertTrue(string + ": " + operation.getLabel(), result.isOK());
	} catch (ExecutionException e) {
		TestCase.fail(string);
	}
	TestCase.assertFalse(operation.canUndo());
	TestCase.assertTrue(operation.canRedo());
}
 

import org.eclipse.core.commands.operations.IOperationHistory; //导入方法依赖的package包/类
@Override
public void undo() {
	try {
		IOperationHistory history = OperationHistoryFactory.getOperationHistory();
		history.undo(context, null, null);
	} catch (ExecutionException e) {
		Logger.getLogger(OperationCommand.class).error("failed to undo: " + operation.toString(), e);
	}
}
 

import org.eclipse.core.commands.operations.IOperationHistory; //导入方法依赖的package包/类
@Override
public void runWithEvent(Event event) {
	if (viewer != null && !viewer.getTextWidget().isDisposed()) {
		XLIFFEditorImplWithNatTable xliffEditor = XLIFFEditorImplWithNatTable.getCurrent();
		// 先保存在撤销，除非以后取消两种模式，否则不要删除此判断
		if (viewer.canDoOperation(ITextOperationTarget.UNDO)) {
			HsMultiActiveCellEditor.commit(true);
		}
		IOperationHistory history = OperationHistoryFactory.getOperationHistory();
		IUndoContext undoContext = (IUndoContext) xliffEditor.getTable().getData(IUndoContext.class.getName());
		if (history.canUndo(undoContext)) {
			try {
				history.undo(undoContext, null, null);
				undoBean.setCrosseStep(undoBean.getCrosseStep() + 1);
			} catch (ExecutionException e) {
				e.printStackTrace();
			}
		}
		XLIFFEditorImplWithNatTable.getCurrent().redraw();
		updateActionsEnableState();
		return;
	}
	if (undoAction != null) {
		undoAction.runWithEvent(event);
		return;
	}
}
 

import org.eclipse.core.commands.operations.IOperationHistory; //导入方法依赖的package包/类
public void runWithEvent(Event event) {
	TeActiveCellEditor.commit();
	IOperationHistory history = OperationHistoryFactory.getOperationHistory();
	IUndoContext context = PlatformUI.getWorkbench().getOperationSupport().getUndoContext();
	if (history.canUndo(context)) {
		try {
			history.undo(context, null, null);
			updateActionsEnableState();
		} catch (ExecutionException e) {
			e.printStackTrace();
		}
	}
}