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1
11 package org.eclipse.ui.internal.navigator.extensions;
12
13 import java.util.HashMap  ;
14 import java.util.Map ;
15
16 import org.eclipse.core.runtime.IConfigurationElement;
17 import org.eclipse.ui.internal.navigator.NavigatorPlugin;
18 import org.eclipse.ui.navigator.MenuInsertionPoint;
19
20
30 public class NavigatorViewerDescriptorManager {
31
32 private static final NavigatorViewerDescriptorManager INSTANCE = new NavigatorViewerDescriptorManager();
33
34 private final Map viewerDescriptors = new HashMap ();
35
36
40 public static NavigatorViewerDescriptorManager getInstance() {
41 return INSTANCE;
42 }
43
44 protected NavigatorViewerDescriptorManager() {
45 new NavigatorViewerDescriptorRegistry().readRegistry();
46 }
47
48
54 public NavigatorViewerDescriptor getNavigatorViewerDescriptor(
55 String aViewerId) {
56
57 NavigatorViewerDescriptor viewerDescriptor = (NavigatorViewerDescriptor) viewerDescriptors
58 .get(aViewerId);
59 if (viewerDescriptor != null) {
60 return viewerDescriptor;
61 }
62
63 synchronized (viewerDescriptors) {
64 viewerDescriptor = (NavigatorViewerDescriptor) viewerDescriptors
65 .get(aViewerId);
66 if (viewerDescriptor == null) {
67 viewerDescriptor = new NavigatorViewerDescriptor(aViewerId);
68 viewerDescriptors.put(viewerDescriptor.getViewerId(),
69 viewerDescriptor);
70 }
71 }
72 return viewerDescriptor;
73
74 }
75
76 private class NavigatorViewerDescriptorRegistry extends RegistryReader
77 implements IViewerExtPtConstants {
78
79 protected NavigatorViewerDescriptorRegistry() {
80 super(NavigatorPlugin.PLUGIN_ID, TAG_VIEWER);
81 }
82
83 protected boolean readElement(IConfigurationElement element) {
84 if (TAG_VIEWER.equals(element.getName())) {
85 String viewerId = element.getAttribute(ATT_VIEWER_ID);
86 NavigatorViewerDescriptor descriptor = getNavigatorViewerDescriptor(viewerId);
87
88 String attPopupMenuId = element.getAttribute(ATT_POPUP_MENU_ID);
89 IConfigurationElement[] tagPopupMenu = element
90 .getChildren(TAG_POPUP_MENU);
91 if (tagPopupMenu.length == 0 && attPopupMenuId != null) {
92 descriptor.setPopupMenuId(attPopupMenuId);
93 } else {
94 if (attPopupMenuId != null) {
95 NavigatorPlugin
96 .logError(
97 0,
98 "A popupMenuId attribute and popupMenu element may NOT be concurrently specified. (see " + element.getNamespaceIdentifier() + ")", null); } else if (tagPopupMenu.length > 1) {
100 NavigatorPlugin
101 .logError(
102 0,
103 "Only one \"popupMenu\" child of \"viewer\" may be specified. (see " + element.getNamespaceIdentifier() + ")", null); } else if(tagPopupMenu.length == 1) {
106 String popupMenuId = tagPopupMenu[0]
107 .getAttribute(ATT_ID);
108 String allowsPlatformContributions = tagPopupMenu[0]
109 .getAttribute(ATT_ALLOWS_PLATFORM_CONTRIBUTIONS);
110
111 if (popupMenuId != null) {
112 descriptor.setPopupMenuId(popupMenuId);
113 }
114
115 if (allowsPlatformContributions != null) {
116 descriptor.setAllowsPlatformContributions(Boolean
117 .valueOf(allowsPlatformContributions)
118 .booleanValue());
119 }
120
121 IConfigurationElement[] insertionPointElements = tagPopupMenu[0]
122 .getChildren(TAG_INSERTION_POINT);
123 MenuInsertionPoint[] insertionPoints = new MenuInsertionPoint[insertionPointElements.length];
124 String name;
125 String stringAttSeparator;
126
127 boolean isSeparator;
128 for (int indx = 0; indx < insertionPointElements.length; indx++) {
129 name = insertionPointElements[indx]
130 .getAttribute(ATT_NAME);
131 stringAttSeparator = insertionPointElements[indx]
132 .getAttribute(ATT_SEPARATOR);
133 isSeparator = stringAttSeparator != null ? Boolean
134 .valueOf(stringAttSeparator).booleanValue()
135 : false;
136 insertionPoints[indx] = new MenuInsertionPoint(name,
137 isSeparator);
138 }
139 descriptor.setCustomInsertionPoints(insertionPoints);
140 }
141 }
142
143 IConfigurationElement[] options = element
144 .getChildren(TAG_OPTIONS);
145 if (options.length == 1) {
146 IConfigurationElement[] properties = options[0]
147 .getChildren(TAG_PROPERTY);
148 String name;
149 String value;
150 for (int i = 0; i < properties.length; i++) {
151 name = properties[i].getAttribute(ATT_NAME);
152 if (name != null) {
153 value = properties[i].getAttribute(ATT_VALUE);
154 descriptor.setProperty(name, value);
155 }
156 }
157 } else if (options.length > 1) {
158 NavigatorPlugin
159 .logError(
160 0,
161 "Only one \"options\" child of \"viewer\" may be specified. (see " + element.getNamespaceIdentifier() + ")", null);
163 }
164 return true;
165 }
166 if (TAG_VIEWER_CONTENT_BINDING.equals(element.getName())) {
167 String viewerId = element.getAttribute(ATT_VIEWER_ID);
168 NavigatorViewerDescriptor descriptor = getNavigatorViewerDescriptor(viewerId);
169 descriptor.consumeContentBinding(element);
170 return true;
171 }
172 if (TAG_VIEWER_ACTION_BINDING.equals(element.getName())) {
173 String viewerId = element.getAttribute(ATT_VIEWER_ID);
174 NavigatorViewerDescriptor descriptor = getNavigatorViewerDescriptor(viewerId);
175 descriptor.consumeActionBinding(element);
176 return true;
177 } if (TAG_DRAG_ASSISTANT.equals(element.getName())) {
178 String viewerId = element.getAttribute(ATT_VIEWER_ID);
179 NavigatorViewerDescriptor descriptor = getNavigatorViewerDescriptor(viewerId);
180 descriptor.addDragAssistant(new CommonDragAssistantDescriptor(element));
181 return true;
182 }
183 return false;
184 }
185 }
186
187 }
188 |
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