Package: ViewerRefreshManager

ViewerRefreshManager

name	instruction	branch	complexity	line	method
getInstance(Viewer)	M: 0 C: 17 100%	M: 0 C: 2 100%	M: 0 C: 2 100%	M: 0 C: 5 100%	M: 0 C: 1 100%
getRefreshRunnable(Viewer)	M: 0 C: 7 100%	M: 0 C: 0 100%	M: 0 C: 1 100%	M: 0 C: 2 100%	M: 0 C: 1 100%
lambda$0(Viewer, Runnable)	M: 6 C: 0 0%	M: 0 C: 0 100%	M: 1 C: 0 0%	M: 1 C: 0 0%	M: 1 C: 0 0%
lambda$1(Control, Viewer)	M: 0 C: 6 100%	M: 0 C: 2 100%	M: 0 C: 2 100%	M: 0 C: 3 100%	M: 0 C: 1 100%

Coverage

1: /*******************************************************************************
2: * Copyright (c) 2019 Christian W. Damus and others.
3: *
4: * All rights reserved. This program and the accompanying materials
5: * are made available under the terms of the Eclipse Public License 2.0
6: * which accompanies this distribution, and is available at
7: * https://www.eclipse.org/legal/epl-2.0/
8: *
9: * SPDX-License-Identifier: EPL-2.0
10: *
11: * Contributors:
12: * Christian W. Damus - initial API and implementation
13: ******************************************************************************/
14: package org.eclipse.emfforms.spi.swt.table;
15:
16: import org.eclipse.jface.viewers.Viewer;
17: import org.eclipse.swt.widgets.Control;
18:
19: /**
20: * Protocol for asynchronous non-redundant refresh of a viewer.
21: * This is {@linkplain Viewer#setData(String, Object) associated with the table viewer}
22: * under the {@link #REFRESH_MANAGER} key.
23: *
24: * @since 1.21
25: */
26: @FunctionalInterface
27: public interface ViewerRefreshManager {
28:
29:         /** Viewer data key for the refresh manager. */
30:         String REFRESH_MANAGER = "refreshManager"; //$NON-NLS-1$
31:
32:         /**
33:          * Post an asynchronous request to refresh the table viewer.
34:          */
35:         void postRefresh();
36:
37:         /**
38:          * Obtain the refresh manager instance for the given {@code viewer}.
39:          *
40:          * @param viewer a viewer
41:          * @return its refresh manager or a simple default implementaiton; never {@code null}
42:          */
43:         static ViewerRefreshManager getInstance(Viewer viewer) {
44:                 final Object result = viewer.getData(REFRESH_MANAGER);
45:
46:•                if (result instanceof ViewerRefreshManager) {
47:                         return (ViewerRefreshManager) result;
48:                 }
49:
50:                 final Runnable refresher = getRefreshRunnable(viewer);
51:                 return () -> viewer.getControl().getDisplay().asyncExec(refresher);
52:         }
53:
54:         /**
55:          * Obtain a runnable that {@linkplain Viewer#refresh() refreshes} a {@code viewer}.
56:          *
57:          * @param viewer a viewer to refresh
58:          * @return the refresh manager
59:          *
60:          * @see Viewer#refresh()
61:          */
62:         static Runnable getRefreshRunnable(Viewer viewer) {
63:                 final Control control = viewer.getControl();
64:
65:                 return () -> {
66:•                        if (!control.isDisposed()) {
67:                                 viewer.refresh();
68:                         }
69:                 };
70:         }
71:
72: }