bundles/org.simantics.ui/src/org/simantics/ui/toolbar/ToolBarCommandRegistry.java

   1 package org.simantics.ui.toolbar;\r
   2 \r
   3 import java.util.ArrayList;\r
   4 import java.util.Collections;\r
   5 import java.util.List;\r
   6 \r
   7 import org.eclipse.core.runtime.IConfigurationElement;\r
   8 import org.eclipse.core.runtime.IExtension;\r
   9 import org.eclipse.core.runtime.IExtensionPoint;\r
  10 import org.eclipse.core.runtime.Platform;\r
  11 import org.eclipse.core.runtime.dynamichelpers.ExtensionTracker;\r
  12 import org.eclipse.core.runtime.dynamichelpers.IExtensionChangeHandler;\r
  13 import org.eclipse.core.runtime.dynamichelpers.IExtensionTracker;\r
  14 import org.eclipse.core.runtime.dynamichelpers.IFilter;\r
  15 import org.simantics.ui.internal.Activator;\r
  16 \r
  17 \r
  18 \r
  19 \r
  20 \r
  21 public class ToolBarCommandRegistry implements IExtensionChangeHandler {\r
  22         private final static String NAMESPACE = Activator.PLUGIN_ID;\r
  23 \r
  24         private final static String EP_NAME = "toolbarCommand";\r
  25         \r
  26         private ExtensionTracker tracker;\r
  27         \r
  28         private List<ToolbarCommandExtension> extensions = new ArrayList<ToolbarCommandExtension>();\r
  29         \r
  30         \r
  31         private static ToolBarCommandRegistry INSTANCE;\r
  32         \r
  33         public static synchronized ToolBarCommandRegistry getInstance() {\r
  34                 if (INSTANCE == null)\r
  35                         INSTANCE = new ToolBarCommandRegistry();\r
  36                 return INSTANCE;\r
  37         }\r
  38         \r
  39         public static synchronized void dispose() {\r
  40                 if (INSTANCE != null) {\r
  41                         INSTANCE.close();\r
  42                         INSTANCE = null;\r
  43                 }       \r
  44         }\r
  45         \r
  46         public ToolBarCommandRegistry() {\r
  47                 tracker = new ExtensionTracker();\r
  48                 \r
  49                 IExtensionPoint ep = Platform.getExtensionRegistry().getExtensionPoint(NAMESPACE,EP_NAME);\r
  50                 loadExtensions(ep.getConfigurationElements());\r
  51                 \r
  52                 IFilter filter = ExtensionTracker.createExtensionPointFilter(ep);\r
  53                 tracker.registerHandler(this, filter);\r
  54         }\r
  55         \r
  56         private void close() {\r
  57                 tracker.close();\r
  58                 tracker = null;\r
  59                 extensions.clear();\r
  60         }\r
  61         \r
  62         public synchronized List<ToolbarCommandExtension> getExtensions() {\r
  63                 return Collections.unmodifiableList(extensions);\r
  64         }\r
  65         \r
  66         private synchronized void loadExtensions(IConfigurationElement[] elements) {\r
  67                 for (IConfigurationElement el : elements) {\r
  68                         String commandId = el.getAttribute("commandId");\r
  69                         \r
  70                         ToolbarCommandExtension ext = new ToolbarCommandExtension(commandId);\r
  71                         ext.toolbarId = el.getAttribute("toolbarId");\r
  72                         ext.image = el.getAttribute("image");\r
  73                         ext.name = el.getAttribute("name");\r
  74                         ext.type = el.getAttribute("type");\r
  75                         ext.value = el.getAttribute("value");\r
  76                         ext.contributorId = el.getContributor().getName();\r
  77                         tracker.registerObject(el.getDeclaringExtension(), ext, IExtensionTracker.REF_STRONG);\r
  78                         extensions.add(ext);\r
  79                         \r
  80                 }\r
  81         }\r
  82         \r
  83         @Override\r
  84     public void addExtension(IExtensionTracker tracker, IExtension extension) {\r
  85         loadExtensions(extension.getConfigurationElements());\r
  86     }\r
  87         \r
  88         @Override\r
  89         public synchronized void removeExtension(IExtension extension, Object[] objects) {\r
  90                 for (Object o : objects) {\r
  91                         ToolbarCommandExtension ext = (ToolbarCommandExtension) o;\r
  92                         tracker.unregisterObject(extension, ext);\r
  93                         extensions.remove(ext);\r
  94                 }\r
  95         }\r
  96         \r
  97         public synchronized List<ToolbarCommandExtension> getExtensions(String toolbarId) {\r
  98                 List<ToolbarCommandExtension> list = new ArrayList<ToolbarCommandExtension>();\r
  99                 for (ToolbarCommandExtension ext : extensions)\r
 100                         if (ext.toolbarId.equals(toolbarId))\r
 101                                 list.add(ext);\r
 102                 return list;\r
 103                 \r
 104         }\r
 105         \r
 106         public class ToolbarCommandExtension {\r
 107                 public String commandId;\r
 108                 public String toolbarId;\r
 109                 public String name;\r
 110                 public String type;\r
 111                 public String value;\r
 112                 public String image;\r
 113                 public String contributorId;\r
 114                 public ToolbarCommandExtension(String commandId) {\r
 115                         super();\r
 116                         this.commandId = commandId;\r
 117                 }\r
 118                 \r
 119                 @Override\r
 120                 public String toString() {\r
 121                         return "ToolbarCommandExtension, commandId= " + commandId + " toolbarId= " + toolbarId + " type= " + type + " value= " + value + " contributor= " + contributorId;\r
 122                 }\r
 123         }\r
 124         \r
 125         \r
 126 }\r