bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/PropertyPageUtil.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management in\r
   3  * 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.browsing.ui.swt;\r
  13 \r
  14 import java.util.ArrayList;\r
  15 import java.util.Collection;\r
  16 \r
  17 import org.eclipse.jface.viewers.ISelection;\r
  18 import org.simantics.db.ReadGraph;\r
  19 import org.simantics.db.Resource;\r
  20 import org.simantics.db.common.ResourceArray;\r
  21 import org.simantics.db.common.utils.NameUtils;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  24 \r
  25 /**\r
  26  * @author Tuukka Lehtonen\r
  27  */\r
  28 public final class PropertyPageUtil {\r
  29 \r
  30     public static final int MAX_SELECTION_LENGTH_TO_SHOW = 5;\r
  31 \r
  32     public static String computeTitle(ReadGraph graph, ISelection selection) throws DatabaseException {\r
  33         boolean sameTypes = true;\r
  34 \r
  35         try {\r
  36 \r
  37             final ResourceArray[] ras = ResourceAdaptionUtils.toResourceArrays(selection);\r
  38             if (ras.length == 0)\r
  39                 return null;\r
  40 \r
  41             // Check if all the input resource are of the same type.\r
  42             Collection<Resource> types = null;\r
  43             for (ResourceArray ra : ras) {\r
  44                 if (ra.isEmpty()) {\r
  45                     return null;\r
  46                 }\r
  47                 if (types == null) {\r
  48                     types = graph.getPrincipalTypes(ra.resources[0]);\r
  49                 } else {\r
  50                     Collection<Resource> ts = graph.getPrincipalTypes(ra.resources[0]);\r
  51                     ts.removeAll(types);\r
  52                     if (!ts.isEmpty()) {\r
  53                         sameTypes = false;\r
  54                         break;\r
  55                     }\r
  56                 }\r
  57             }\r
  58             if (sameTypes) {\r
  59                 // If the resource no longer exists, provide default name only.\r
  60                 if (!graph.hasStatement(ras[0].resources[0])) {\r
  61                     return null;\r
  62                 }\r
  63 \r
  64                 String name = safeGetName(graph, ras[0].resources[0]);\r
  65                 if (ras.length > 1)\r
  66                     name += " [" + ras.length +"]";\r
  67                 return name;\r
  68             } else {\r
  69                 Collection<String> names = new ArrayList<String>(ras.length);\r
  70                 boolean truncate = ras.length > MAX_SELECTION_LENGTH_TO_SHOW;\r
  71                 int end = Math.min(ras.length, MAX_SELECTION_LENGTH_TO_SHOW);\r
  72                 int missing = ras.length - end;\r
  73                 for (int i = 0; i < end; ++i) {\r
  74                     // If the resource no longer exists, provide default name only.\r
  75                     if (!graph.hasStatement(ras[i].resources[0]))\r
  76                         continue;\r
  77 \r
  78                     names.add(safeGetName(graph, ras[i].resources[0]));\r
  79                 }\r
  80                 if (names.isEmpty()) {\r
  81                     return null;\r
  82                 }\r
  83 \r
  84                 if (truncate)\r
  85                     names.add("+ " + missing + " more...");\r
  86 \r
  87                 String name = names.toString();\r
  88                 return name;\r
  89             }\r
  90 \r
  91         } catch (Throwable t) {\r
  92             t.printStackTrace();\r
  93             return null;\r
  94         }\r
  95    }\r
  96 \r
  97     private static String safeGetName(ReadGraph g, Resource r) throws DatabaseException {\r
  98         return NameUtils.getSafeName(g, r);\r
  99 //        try {\r
 100 //            //System.out.println("safeGetName " + r);\r
 101 //            return g.adapt(r, String.class);\r
 102 //        } catch (AdaptionException e) {\r
 103 //            return NameUtils.getSafeName(g, r);\r
 104 //        }\r
 105     }\r
 106 \r
 107 }