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11 package org.eclipse.help.ui.internal.views;
12
13 import java.util.Dictionary  ;
14
15 import org.eclipse.core.runtime.CoreException;
16 import org.eclipse.core.runtime.IConfigurationElement;
17 import org.eclipse.help.search.ISearchEngine;
18 import org.eclipse.help.search.ISearchScope;
19 import org.eclipse.help.ui.ISearchScopeFactory;
20 import org.eclipse.help.ui.RootScopePage;
21 import org.eclipse.help.ui.internal.HelpUIPlugin;
22 import org.eclipse.help.ui.internal.HelpUIResources;
23 import org.eclipse.help.ui.internal.IHelpUIConstants;
24 import org.eclipse.jface.preference.IPreferenceStore;
25 import org.eclipse.jface.resource.ImageDescriptor;
26 import org.eclipse.swt.graphics.Image;
27
28
31 public class EngineTypeDescriptor {
32 private IConfigurationElement config;
33 private Image image;
34 private ISearchScopeFactory factory;
35
38 public EngineTypeDescriptor(IConfigurationElement config) {
39 this.config = config;
40 }
41 public IConfigurationElement getConfig() {
42 return config;
43 }
44 public IConfigurationElement [] getPages() {
45 return config.getChildren("subpage"); }
47
48 public String getLabel() {
49 return config.getAttribute(IHelpUIConstants.ATT_LABEL);
50 }
51 public String getId() {
52 return config.getAttribute(IHelpUIConstants.ATT_ID);
53 }
54
55 public Image getIconImage() {
56 if (image!=null)
57 return image;
58 String icon = config.getAttribute(IHelpUIConstants.ATT_ICON);
59 if (icon!=null) {
60 String bundleId = config.getContributor().getName();
61 HelpUIResources.getImageDescriptor(bundleId, icon);
62 return HelpUIResources.getImage(icon);
63 }
64 image = HelpUIResources.getImage(IHelpUIConstants.IMAGE_HELP_SEARCH);
65 return image;
66 }
67 public String getDescription() {
68 String desc = null;
69 IConfigurationElement [] children = config.getChildren(IHelpUIConstants.TAG_DESC);
70 if (children.length==1)
71 desc = children[0].getValue();
72 return desc;
73 }
74 public ImageDescriptor getImageDescriptor() {
75 ImageDescriptor desc=null;
76 String icon = config.getAttribute(IHelpUIConstants.ATT_ICON);
77 if (icon!=null)
78 desc = HelpUIResources.getImageDescriptor(icon);
79 else
80 desc = HelpUIResources.getImageDescriptor(IHelpUIConstants.IMAGE_HELP_SEARCH);
81 return desc;
82 }
83 public RootScopePage createRootPage(String scopeSetName) {
84 try {
85 Object obj = config.createExecutableExtension(IHelpUIConstants.ATT_PAGE_CLASS);
86 if (obj instanceof RootScopePage) {
87 RootScopePage page = (RootScopePage)obj;
88 return page;
89 }
90 return null;
91 }
92 catch (CoreException e) {
93 return null;
94 }
95 }
96 public ISearchEngine createEngine() {
97 String eclass = config.getAttribute(IHelpUIConstants.ATT_CLASS);
98 if (eclass!=null) {
99 try {
100 Object obj = config.createExecutableExtension(IHelpUIConstants.ATT_CLASS);
101 if (obj instanceof ISearchEngine)
102 return (ISearchEngine)obj;
103 }
104 catch (CoreException e) {
105 HelpUIPlugin.logError("Engine " + eclass + " cannot be instantiated", null); }
107 }
108 return null;
109 }
110
111 public ISearchScope createSearchScope(IPreferenceStore store, String engineId, Dictionary parameters) {
112 if (factory==null) {
113 String fclass = config.getAttribute(IHelpUIConstants.ATT_SCOPE_FACTORY);
114 if (fclass!=null) {
115 try {
116 Object obj = config.createExecutableExtension(IHelpUIConstants.ATT_SCOPE_FACTORY);
117 if (obj instanceof ISearchScopeFactory) {
118 factory = (ISearchScopeFactory)obj;
119 }
120 }
121 catch (CoreException e) {
122 HelpUIPlugin.logError("Scope factory " + fclass + " cannot be instantiated", null); }
124 }
125 }
126 if (factory!=null)
127 return factory.createSearchScope(store, engineId, parameters);
128 return null;
129 }
130 }
131 |
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