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1
11
12 package org.eclipse.ui.internal.contexts;
13
14 import java.io.IOException  ;
15 import java.util.ArrayList ;
16 import java.util.Collections ;
17 import java.util.List ;
18
19 import org.eclipse.core.runtime.IConfigurationElement;
20 import org.eclipse.core.runtime.IExtension;
21 import org.eclipse.core.runtime.IExtensionDelta;
22 import org.eclipse.core.runtime.IExtensionRegistry;
23 import org.eclipse.core.runtime.IRegistryChangeEvent;
24 import org.eclipse.core.runtime.IRegistryChangeListener;
25 import org.eclipse.ui.internal.util.ConfigurationElementMemento;
26
27 final class ExtensionContextRegistry extends AbstractContextRegistry {
28 private List contextContextBindingDefinitions;
29 private List contextDefinitions;
30 private IExtensionRegistry extensionRegistry;
31
32 ExtensionContextRegistry(IExtensionRegistry extensionRegistry) {
33 if (extensionRegistry == null)
34 throw new NullPointerException ();
35
36 this.extensionRegistry = extensionRegistry;
37
38 this
39 .extensionRegistry
40 .addRegistryChangeListener(new IRegistryChangeListener() {
41 public void registryChanged(IRegistryChangeEvent registryChangeEvent) {
42 IExtensionDelta[] extensionDeltas =
43 registryChangeEvent.getExtensionDeltas(
44 Persistence.PACKAGE_PREFIX,
45 Persistence.PACKAGE_BASE);
46
47 if (extensionDeltas.length != 0)
48 try {
49 load();
50 } catch (IOException eIO) {
51 }
52 }
53 });
54
55 try {
56 load();
57 } catch (IOException eIO) {
58 }
59 }
60
61 private String getNamespace(IConfigurationElement configurationElement) {
62 String namespace = null;
63
64 if (configurationElement != null) {
65 IExtension extension = configurationElement.getDeclaringExtension();
66
67 if (extension != null)
68 namespace = extension.getNamespace();
69 }
70
71 return namespace;
72 }
73
74 private void load() throws IOException {
75 if (contextContextBindingDefinitions == null)
76 contextContextBindingDefinitions = new ArrayList ();
77 else
78 contextContextBindingDefinitions.clear();
79
80 if (contextDefinitions == null)
81 contextDefinitions = new ArrayList ();
82 else
83 contextDefinitions.clear();
84
85 IConfigurationElement[] deprecatedConfigurationElements = extensionRegistry.getConfigurationElementsFor("org.eclipse.ui.acceleratorScopes");
88 for (int i = 0; i < deprecatedConfigurationElements.length; i++) {
89 IConfigurationElement deprecatedConfigurationElement =
90 deprecatedConfigurationElements[i];
91 String name = deprecatedConfigurationElement.getName();
92
93 if ("acceleratorScope".equals(name)) readContextDefinition(deprecatedConfigurationElement);
95 }
96
97 deprecatedConfigurationElements = extensionRegistry.getConfigurationElementsFor("org.eclipse.ui.commands");
99 for (int i = 0; i < deprecatedConfigurationElements.length; i++) {
100 IConfigurationElement deprecatedConfigurationElement =
101 deprecatedConfigurationElements[i];
102 String name = deprecatedConfigurationElement.getName();
103
104 if ("scope".equals(name)) readContextDefinition(deprecatedConfigurationElement);
106 }
107
109 IConfigurationElement[] configurationElements =
110 extensionRegistry.getConfigurationElementsFor(
111 Persistence.PACKAGE_FULL);
112
113 for (int i = 0; i < configurationElements.length; i++) {
114 IConfigurationElement configurationElement =
115 configurationElements[i];
116 String name = configurationElement.getName();
117
118 if (Persistence.TAG_CONTEXT.equals(name))
119 readContextDefinition(configurationElement);
120 }
121
122 boolean contextRegistryChanged = false;
123
124 if (!contextContextBindingDefinitions
125 .equals(super.contextContextBindingDefinitions)) {
126 super.contextContextBindingDefinitions =
127 Collections.unmodifiableList(contextContextBindingDefinitions);
128 contextRegistryChanged = true;
129 }
130
131 if (!contextDefinitions.equals(super.contextDefinitions)) {
132 super.contextDefinitions =
133 Collections.unmodifiableList(contextDefinitions);
134 contextRegistryChanged = true;
135 }
136
137 if (contextRegistryChanged)
138 fireContextRegistryChanged();
139 }
140
141 private void readContextDefinition(IConfigurationElement configurationElement) {
142 ContextDefinition contextDefinition =
143 Persistence.readContextDefinition(
144 new ConfigurationElementMemento(configurationElement),
145 getNamespace(configurationElement));
146
147 if (contextDefinition != null)
148 contextDefinitions.add(contextDefinition);
149 }
150 }
151 |
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