bundles/org.simantics.issues.ui/src/org/simantics/issues/ui/handler/PreferenceHandler.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2011 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.issues.ui.handler;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 import java.util.Collections;\r
  17 import java.util.List;\r
  18 import java.util.Map;\r
  19 \r
  20 import org.eclipse.core.commands.AbstractHandler;\r
  21 import org.eclipse.core.commands.ExecutionEvent;\r
  22 import org.eclipse.core.commands.ExecutionException;\r
  23 import org.eclipse.jface.viewers.ISelection;\r
  24 import org.eclipse.jface.viewers.ISelectionProvider;\r
  25 import org.eclipse.ui.IWorkbenchSite;\r
  26 import org.eclipse.ui.commands.IElementUpdater;\r
  27 import org.eclipse.ui.handlers.HandlerUtil;\r
  28 import org.eclipse.ui.menus.UIElement;\r
  29 import org.simantics.Simantics;\r
  30 import org.simantics.db.ReadGraph;\r
  31 import org.simantics.db.Resource;\r
  32 import org.simantics.db.Session;\r
  33 import org.simantics.db.WriteGraph;\r
  34 import org.simantics.db.common.utils.TagUtil;\r
  35 import org.simantics.db.exception.DatabaseException;\r
  36 import org.simantics.db.layer0.SelectionHints;\r
  37 import org.simantics.db.layer0.adapter.ActionFactory;\r
  38 import org.simantics.db.layer0.adapter.ActionFactory2;\r
  39 import org.simantics.db.layer0.variable.Variable;\r
  40 import org.simantics.db.request.Read;\r
  41 import org.simantics.issues.ontology.IssueResource;\r
  42 import org.simantics.utils.datastructures.SelectionUtils;\r
  43 import org.simantics.utils.ui.ErrorLogger;\r
  44 import org.simantics.utils.ui.ISelectionUtils;\r
  45 \r
  46 /**\r
  47  * @author Tuukka Lehtonen\r
  48  */\r
  49 class PreferenceHandler extends AbstractHandler implements IElementUpdater, ActionFactory, ActionFactory2 {\r
  50 \r
  51     protected final String virtualGraphId;\r
  52     private final String   tagURI;\r
  53     private final boolean  tag;\r
  54 \r
  55     public PreferenceHandler() {\r
  56         this("preferences", null, false);\r
  57     }\r
  58 \r
  59     public PreferenceHandler(String tagURI, boolean tag) {\r
  60         this("preferences", tagURI, tag);\r
  61     }\r
  62 \r
  63     public PreferenceHandler(String virtualGraphId) {\r
  64         this(virtualGraphId, null, false);\r
  65     }\r
  66 \r
  67     public PreferenceHandler(String virtualGraphId, String tagURI, boolean tag) {\r
  68         this.virtualGraphId = virtualGraphId;\r
  69         this.tagURI = tagURI;\r
  70         this.tag = tag;\r
  71     }\r
  72 \r
  73     public ArrayList<Resource> filteredSelection(ReadGraph graph, List<Resource> resources, List<Variable> vars) throws DatabaseException {\r
  74         IssueResource ISSUE = IssueResource.getInstance(graph);\r
  75         ArrayList<Resource> sel = new ArrayList<Resource>();\r
  76         for (Variable v : vars) {\r
  77             //System.out.println("var: " + v.getURI(graph));\r
  78             Resource r = v.getPossibleRepresents(graph);\r
  79             if (r != null && graph.isInstanceOf(r, ISSUE.Issue))\r
  80                 sel.add(r);\r
  81         }\r
  82         for (Resource r : resources)\r
  83             if (graph.isInstanceOf(r, ISSUE.Issue))\r
  84                 sel.add(r);\r
  85                 return sel;\r
  86     }\r
  87 \r
  88     @Override\r
  89     public Object execute(ExecutionEvent event) throws ExecutionException {\r
  90         IWorkbenchSite site = HandlerUtil.getActiveSite(event);\r
  91         ISelectionProvider sp = site.getSelectionProvider();\r
  92         ISelection selection = sp.getSelection();\r
  93         final List<Variable> vars = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Variable.class);\r
  94         final List<Resource> resources = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);\r
  95         execute(vars, resources);\r
  96         return null;\r
  97     }\r
  98 \r
  99     public void execute(final List<Variable> vars, List<Resource> resources) {\r
 100         Session session = Simantics.peekSession();\r
 101         if (session == null)\r
 102             return;\r
 103         new TagUtil(virtualGraphId, tagURI, tag) {\r
 104             @Override\r
 105             protected void processSelection(WriteGraph graph, List<Resource> resources) throws DatabaseException {\r
 106                 graph.markUndoPoint();\r
 107                 ArrayList<Resource> sel = filteredSelection(graph, resources, vars);\r
 108                 if (!process(graph))\r
 109                     return;\r
 110                 super.processSelection(graph, sel);\r
 111             }\r
 112         }.execute(session, resources);\r
 113     }\r
 114 \r
 115     /**\r
 116      * @return <code>false</code> to perform no further actions after this\r
 117      *         method completes.\r
 118      */\r
 119     protected boolean process(WriteGraph graph) throws DatabaseException {\r
 120         return true;\r
 121     }\r
 122 \r
 123     @SuppressWarnings("rawtypes")\r
 124     @Override\r
 125     public void updateElement(UIElement element, Map parameters) {\r
 126         Session session = Simantics.peekSession();\r
 127         if (session == null)\r
 128             return;\r
 129         try {\r
 130             boolean checked = session.syncRequest(new Read<Boolean>() {\r
 131                 @Override\r
 132                 public Boolean perform(ReadGraph graph) throws DatabaseException {\r
 133                     return isChecked(graph);\r
 134                 }\r
 135             });\r
 136             element.setChecked(checked);\r
 137         } catch (DatabaseException e) {\r
 138             ErrorLogger.defaultLogError(e);\r
 139         }\r
 140     }\r
 141 \r
 142     protected boolean isChecked(ReadGraph graph) throws DatabaseException {\r
 143         return false;\r
 144     }\r
 145 \r
 146         @Override\r
 147         public Runnable create(Object target) {\r
 148 \r
 149                 if(!(target instanceof Variable))\r
 150                         return null;\r
 151 \r
 152                 final Variable issue = (Variable)target;\r
 153 \r
 154                 return new Runnable() {\r
 155 \r
 156                         @Override\r
 157                         public void run() {\r
 158                                 execute(Collections.singletonList(issue), Collections.<Resource>emptyList());\r
 159                         }\r
 160 \r
 161                 };\r
 162 \r
 163         }\r
 164 \r
 165         @Override\r
 166         public Runnable create(Collection<?> targets) {\r
 167                 final List<Variable> issues = new ArrayList<Variable>(ISelectionUtils.filterSetSelection(targets, Variable.class));\r
 168                 if (issues.isEmpty())\r
 169                         return null;\r
 170                 return new Runnable() {\r
 171                         @Override\r
 172                         public void run() {\r
 173                                 execute(issues, Collections.<Resource>emptyList());\r
 174                         }\r
 175                 };\r
 176         }\r
 177 \r
 178 }\r