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1
11 package org.eclipse.ui.internal.contexts;
12
13 import java.util.Collection  ;
14 import java.util.Iterator ;
15
16 import org.eclipse.core.commands.contexts.Context;
17 import org.eclipse.core.commands.contexts.ContextManager;
18 import org.eclipse.core.commands.contexts.IContextManagerListener;
19 import org.eclipse.core.expressions.Expression;
20 import org.eclipse.swt.widgets.Shell;
21 import org.eclipse.ui.ISourceProvider;
22 import org.eclipse.ui.ISources;
23 import org.eclipse.ui.contexts.IContextActivation;
24 import org.eclipse.ui.contexts.IContextService;
25
26
34 public final class ContextService implements IContextService {
35
36
39 private final ContextAuthority contextAuthority;
40
41
45 private final ContextManager contextManager;
46
47
50 private final ContextPersistence contextPersistence;
51
52
59 public ContextService(final ContextManager contextManager) {
60 if (contextManager == null) {
61 throw new NullPointerException (
62 "Cannot create a context service with a null manager"); }
64 this.contextManager = contextManager;
65 this.contextAuthority = new ContextAuthority(contextManager, this);
66 this.contextPersistence = new ContextPersistence(contextManager);
67 }
68
69
74 public final IContextActivation activateContext(final String contextId) {
75 return activateContext(contextId, null);
76 }
77
78
84 public final IContextActivation activateContext(final String contextId,
85 final Expression expression) {
86 final IContextActivation activation = new ContextActivation(contextId,
87 expression, this);
88 contextAuthority.activateContext(activation);
89 return activation;
90 }
91
92
98 public IContextActivation activateContext(String contextId,
99 Expression expression, boolean global) {
100 return activateContext(contextId, expression);
101 }
102
103
109 public final IContextActivation activateContext(final String contextId,
110 final Expression expression, final int sourcePriority) {
111 return activateContext(contextId, expression);
112 }
113
114
119 public final void addContextManagerListener(
120 final IContextManagerListener listener) {
121 contextManager.addContextManagerListener(listener);
122 }
123
124
129 public final void addSourceProvider(final ISourceProvider provider) {
130 contextAuthority.addSourceProvider(provider);
131 }
132
133
138 public final void deactivateContext(final IContextActivation activation) {
139 if (activation.getContextService() == this) {
140 contextAuthority.deactivateContext(activation);
141 }
142 }
143
144
149 public final void deactivateContexts(final Collection activations) {
150 final Iterator activationItr = activations.iterator();
151 while (activationItr.hasNext()) {
152 final IContextActivation activation = (IContextActivation) activationItr
153 .next();
154 deactivateContext(activation);
155 }
156 }
157
158
163 public final void dispose() {
164 contextPersistence.dispose();
165 contextAuthority.dispose();
166 }
167
168
173 public final Collection getActiveContextIds() {
174 return contextManager.getActiveContextIds();
175 }
176
177
182 public final Context getContext(final String contextId) {
183 return contextManager.getContext(contextId);
184 }
185
186
191 public final Collection getDefinedContextIds() {
192 return contextManager.getDefinedContextIds();
193 }
194
195
200 public final Context[] getDefinedContexts() {
201 return contextManager.getDefinedContexts();
202 }
203
204
209 public final int getShellType(final Shell shell) {
210 return contextAuthority.getShellType(shell);
211 }
212
213
218 public final void readRegistry() {
219 contextPersistence.read();
220 }
221
222
228 public final boolean registerShell(final Shell shell, final int type) {
229 return contextAuthority.registerShell(shell, type);
230 }
231
232
237 public final void removeContextManagerListener(
238 final IContextManagerListener listener) {
239 contextManager.addContextManagerListener(listener);
240 }
241
242
247 public final void removeSourceProvider(final ISourceProvider provider) {
248 contextAuthority.removeSourceProvider(provider);
249 }
250
251
256 public final boolean unregisterShell(final Shell shell) {
257 return contextAuthority.unregisterShell(shell);
258 }
259
260
270 public final void updateShellKludge() {
271 contextAuthority.updateShellKludge();
272 }
273
274
288 public final void updateShellKludge(final Shell shell) {
289 final Shell currentActiveShell = contextAuthority.getActiveShell();
290 if (currentActiveShell != shell) {
291 contextAuthority.sourceChanged(ISources.ACTIVE_SHELL,
292 ISources.ACTIVE_SHELL_NAME, shell);
293 }
294 }
295 }
296 |
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