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1
11 package org.eclipse.ui.internal.registry;
12
13 import java.util.StringTokenizer  ;
14
15 import org.eclipse.core.commands.IHandler;
16 import org.eclipse.core.runtime.CoreException;
17 import org.eclipse.core.runtime.IConfigurationElement;
18 import org.eclipse.core.runtime.IExtension;
19 import org.eclipse.core.runtime.IStatus;
20 import org.eclipse.core.runtime.Status;
21 import org.eclipse.jface.resource.ImageDescriptor;
22 import org.eclipse.ui.IPageLayout;
23 import org.eclipse.ui.IPluginContribution;
24 import org.eclipse.ui.ISharedImages;
25 import org.eclipse.ui.IViewPart;
26 import org.eclipse.ui.PlatformUI;
27 import org.eclipse.ui.handlers.IHandlerActivation;
28 import org.eclipse.ui.handlers.IHandlerService;
29 import org.eclipse.ui.internal.WorkbenchPlugin;
30 import org.eclipse.ui.plugin.AbstractUIPlugin;
31 import org.eclipse.ui.views.IViewDescriptor;
32
33
36 public class ViewDescriptor implements IViewDescriptor, IPluginContribution {
37 private String id;
38
39 private ImageDescriptor imageDescriptor;
40
41 private IConfigurationElement configElement;
42
43 private String [] categoryPath;
44
45 private float fastViewWidthRatio;
46
47
51 private IHandlerActivation handlerActivation;
52
53
59 public ViewDescriptor(IConfigurationElement e)
60 throws CoreException {
61 configElement = e;
62 loadFromExtension();
63 }
64
65
68 public IViewPart createView() throws CoreException {
69 Object extension = WorkbenchPlugin.createExtension(
70 getConfigurationElement(),
71 IWorkbenchRegistryConstants.ATT_CLASS);
72 return (IViewPart) extension;
73 }
74
75
78 public String [] getCategoryPath() {
79 return categoryPath;
80 }
81
82
87 public IConfigurationElement getConfigurationElement() {
88 return configElement;
89 }
90
91
94 public String getDescription() {
95 return RegistryReader.getDescription(configElement);
96 }
97
98
101 public String getId() {
102 return id;
103 }
104
105
108 public ImageDescriptor getImageDescriptor() {
109 if (imageDescriptor != null) {
110 return imageDescriptor;
111 }
112 String iconName = configElement.getAttribute(IWorkbenchRegistryConstants.ATT_ICON);
113 if (iconName == null) {
115 return PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(
116 ISharedImages.IMG_DEF_VIEW);
117 }
118 IExtension extension = configElement.getDeclaringExtension();
119 String extendingPluginId = extension.getNamespace();
120 imageDescriptor = AbstractUIPlugin.imageDescriptorFromPlugin(
121 extendingPluginId, iconName);
122 if (imageDescriptor == null) {
124 imageDescriptor = ImageDescriptor.getMissingImageDescriptor();
125 }
126
127 return imageDescriptor;
128 }
129
130
133 public String getLabel() {
134 return configElement.getAttribute(IWorkbenchRegistryConstants.ATT_NAME);
135 }
136
137
142 public String getAccelerator() {
143 return configElement.getAttribute(IWorkbenchRegistryConstants.ATT_ACCELERATOR);
144 }
145
146
149 public float getFastViewWidthRatio() {
150 configElement.getAttribute(IWorkbenchRegistryConstants.ATT_FAST_VIEW_WIDTH_RATIO); return fastViewWidthRatio;
152 }
153
154
157 private void loadFromExtension() throws CoreException {
158 id = configElement.getAttribute(IWorkbenchRegistryConstants.ATT_ID);
159
160 String category = configElement.getAttribute(IWorkbenchRegistryConstants.TAG_CATEGORY);
161
162 if ((configElement.getAttribute(IWorkbenchRegistryConstants.ATT_NAME) == null)
164 || (RegistryReader.getClassValue(configElement,
165 IWorkbenchRegistryConstants.ATT_CLASS) == null)) {
166 throw new CoreException(new Status(IStatus.ERROR, configElement
167 .getNamespace(), 0,
168 "Invalid extension (missing label or class name): " + id, null));
170 }
171
172 if (category != null) {
173 StringTokenizer stok = new StringTokenizer (category, "/"); categoryPath = new String [stok.countTokens()];
175 for (int i = 0; stok.hasMoreTokens(); i++) {
177 categoryPath[i] = stok.nextToken();
178 }
179 }
180
181 String ratio = configElement.getAttribute(IWorkbenchRegistryConstants.ATT_FAST_VIEW_WIDTH_RATIO);
182 if (ratio != null) {
183 try {
184 fastViewWidthRatio = new Float (ratio).floatValue();
185 if (fastViewWidthRatio > IPageLayout.RATIO_MAX) {
186 fastViewWidthRatio = IPageLayout.RATIO_MAX;
187 }
188 if (fastViewWidthRatio < IPageLayout.RATIO_MIN) {
189 fastViewWidthRatio = IPageLayout.RATIO_MIN;
190 }
191 } catch (NumberFormatException e) {
192 fastViewWidthRatio = IPageLayout.DEFAULT_FASTVIEW_RATIO;
193 }
194 } else {
195 fastViewWidthRatio = IPageLayout.DEFAULT_FASTVIEW_RATIO;
196 }
197 }
198
199
203 public String toString() {
204 return "View(" + getId() + ")"; }
206
207
212 public String getPluginId() {
213 String pluginId = configElement.getNamespace();
214 return pluginId == null ? "" : pluginId; }
216
217
222 public String getLocalId() {
223 return getId() == null ? "" : getId(); }
225
226
229 public boolean getAllowMultiple() {
230 String string = configElement.getAttribute(IWorkbenchRegistryConstants.ATT_ALLOW_MULTIPLE);
231 return string == null ? false : Boolean.valueOf(string).booleanValue();
232 }
233
234
237 public Object getAdapter(Class adapter) {
238 if (adapter.equals(IConfigurationElement.class)) {
239 return getConfigurationElement();
240 }
241 return null;
242 }
243
244
251 public final void activateHandler() {
252 if (handlerActivation == null) {
253 final IHandler handler = new ShowViewHandler(getId());
254 final IHandlerService handlerService = (IHandlerService) PlatformUI.getWorkbench().getService(IHandlerService.class);
255 handlerActivation = handlerService
256 .activateHandler(getId(), handler);
257 }
258 }
259
260
267 public final void deactivateHandler() {
268 if (handlerActivation != null) {
269 final IHandlerService handlerService = (IHandlerService) PlatformUI.getWorkbench().getService(IHandlerService.class);
270 handlerService.deactivateHandler(handlerActivation);
271 handlerActivation = null;
272 }
273 }
274 }
275 |
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