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1
11 package org.eclipse.compare.internal;
12
13 import java.util.ArrayList  ;
14 import java.util.List ;
15
16 import org.eclipse.compare.ICompareContainer;
17 import org.eclipse.core.expressions.Expression;
18 import org.eclipse.jface.action.IAction;
19 import org.eclipse.jface.commands.ActionHandler;
20 import org.eclipse.swt.widgets.Shell;
21 import org.eclipse.ui.*;
22 import org.eclipse.ui.handlers.IHandlerActivation;
23 import org.eclipse.ui.handlers.IHandlerService;
24 import org.eclipse.ui.services.IServiceLocator;
25
26 public class CompareHandlerService {
27
28 private final List fActivations = new ArrayList ();
29 private final Expression fExpression;
30 private ICompareContainer fContainer;
31 private boolean fDisposed;
32 private List fPaneActivations = new ArrayList ();
33 private IHandlerService fHandlerService;
34
35 public static CompareHandlerService createFor(ICompareContainer container, Shell shell) {
36 IServiceLocator serviceLocator = container.getServiceLocator();
37 if (serviceLocator != null) {
38 IHandlerService service = (IHandlerService)serviceLocator.getService(IHandlerService.class);
39 if (service != null)
40 return new CompareHandlerService(container, null);
41 }
42 if (container.getWorkbenchPart() == null && shell != null) {
43 IHandlerService service = (IHandlerService)PlatformUI.getWorkbench().getService(IHandlerService.class);
45 if (service != null) {
46 Expression e = new ActiveShellExpression(shell);
47 return new CompareHandlerService(container, e);
48 }
49 }
50 return new CompareHandlerService(null, null);
51 }
52
53 private CompareHandlerService(ICompareContainer container,
54 Expression expression) {
55 fContainer = container;
56 fExpression = expression;
57 initialize();
58 }
59
60 public void registerAction(IAction action, String commandId) {
61 IHandlerService handlerService = getHandlerService();
62 if (handlerService == null)
63 return;
64 action.setActionDefinitionId(commandId);
65 IHandlerActivation activation;
66 if (fExpression == null) {
67 activation = handlerService.activateHandler(commandId, new ActionHandler(action));
68 } else {
69 activation = handlerService.activateHandler(commandId, new ActionHandler(action), fExpression);
70 }
71 if (activation != null) {
72 fActivations .add(activation);
73 }
74 }
75
76 private IHandlerService getHandlerService() {
77 if (fDisposed)
78 return null;
79 return fHandlerService;
80 }
81
82 private void initialize() {
83 if (fHandlerService == null) {
84 IServiceLocator serviceLocator = fContainer.getServiceLocator();
85 if (serviceLocator != null) {
86 IHandlerService service = (IHandlerService)serviceLocator.getService(IHandlerService.class);
87 if (service != null)
88 fHandlerService = service;
89 }
90 if (fHandlerService == null && fContainer.getWorkbenchPart() == null && fExpression != null) {
91 IHandlerService service = (IHandlerService)PlatformUI.getWorkbench().getService(IHandlerService.class);
93 if (service != null) {
94 fHandlerService = service;
95 }
96 }
97 }
98 }
99
100 public void setGlobalActionHandler(String actionId, IAction actionHandler) {
101 IActionBars bars = getActionBars();
102 if (bars != null) {
103 bars.setGlobalActionHandler(actionId, actionHandler);
104 return;
105 } else if (fExpression != null && actionHandler != null && actionHandler.getActionDefinitionId() != null) {
106 IHandlerService service = getHandlerService();
107 if (service != null) {
108 IHandlerActivation activation = service.activateHandler(actionHandler.getActionDefinitionId(), new ActionHandler(actionHandler), fExpression);
109 fPaneActivations.add(activation);
110 return;
111 }
112 }
113 if (actionHandler != null)
115 actionHandler.setActionDefinitionId(null);
116 }
117
118 private void updateActionBars() {
119 IActionBars bars = getActionBars();
120 if (bars != null)
121 bars.updateActionBars();
122 }
123
124 private void clearPaneActionHandlers() {
125 if (!fPaneActivations.isEmpty()) {
126 IHandlerService service = getHandlerService();
127 if (service != null) {
128 service.deactivateHandlers(fPaneActivations);
129 fPaneActivations.clear();
130 }
131 }
132 }
133
134 private IActionBars getActionBars() {
135 return fContainer.getActionBars();
136 }
137
138 public void dispose() {
139 clearPaneActionHandlers();
140 IHandlerService service = getHandlerService();
141 if (service == null)
142 return;
143 service.deactivateHandlers(fActivations);
144 fActivations.clear();
145 fDisposed = true;
146 }
147
148 public void updatePaneActionHandlers(Runnable runnable) {
149 clearPaneActionHandlers();
150 runnable.run();
151 updateActionBars();
152 }
153 }
154 |
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