gerrit.simantics Code Review - simantics/sysdyn.git/blob

   1 /*******************************************************************************\r
   2  * Copyright (c) 2010 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.sysdyn.ui.properties.widgets.expressions;\r
  13 \r
  14 import java.util.Arrays;\r
  15 import java.util.Collection;\r
  16 import java.util.List;\r
  17 import java.util.Map;\r
  18 \r
  19 import org.eclipse.jface.layout.GridDataFactory;\r
  20 import org.eclipse.jface.layout.GridLayoutFactory;\r
  21 import org.eclipse.jface.text.BadLocationException;\r
  22 import org.eclipse.jface.text.IDocument;\r
  23 import org.eclipse.swt.SWT;\r
  24 import org.eclipse.swt.custom.VerifyKeyListener;\r
  25 import org.eclipse.swt.events.FocusListener;\r
  26 import org.eclipse.swt.events.KeyListener;\r
  27 import org.eclipse.swt.events.ModifyListener;\r
  28 import org.eclipse.swt.graphics.Point;\r
  29 import org.eclipse.swt.widgets.Composite;\r
  30 import org.eclipse.swt.widgets.Label;\r
  31 import org.simantics.databoard.Bindings;\r
  32 import org.simantics.db.ReadGraph;\r
  33 import org.simantics.db.Resource;\r
  34 import org.simantics.db.VirtualGraph;\r
  35 import org.simantics.db.WriteGraph;\r
  36 import org.simantics.db.common.request.WriteRequest;\r
  37 import org.simantics.db.common.utils.OrderedSetUtils;\r
  38 import org.simantics.db.exception.DatabaseException;\r
  39 import org.simantics.db.request.Read;\r
  40 import org.simantics.layer0.Layer0;\r
  41 import org.simantics.layer0.utils.direct.GraphUtils;\r
  42 import org.simantics.sysdyn.SysdynResource;\r
  43 import org.simantics.sysdyn.ui.utils.ExpressionUtils;\r
  44 import org.simantics.ui.SimanticsUI;\r
  45 \r
  46 /**\r
  47  * Basic expression that is used with parameter, auxiliary and constant\r
  48  * @author Teemu Lempinen\r
  49  *\r
  50  */\r
  51 public class BasicExpression implements IExpression {\r
  52 \r
  53     private ExpressionField expression;\r
  54     protected Resource expressionType;\r
  55 \r
  56     @Override\r
  57     public void createExpressionFields(Composite parent, Map<String, Object> data) {\r
  58         // Create the single field\r
  59         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parent);\r
  60         String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  61 \r
  62         Label l = new Label(parent, SWT.NONE);\r
  63         l.setText("=");\r
  64 \r
  65         expression = new ExpressionField(parent, SWT.BORDER);\r
  66         expression.setExpression(equation);\r
  67         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  68 \r
  69     }\r
  70 \r
  71     @Override\r
  72     public void focus() {\r
  73         this.expression.focus();\r
  74 \r
  75     }\r
  76 \r
  77     @Override\r
  78     public List<ExpressionField> getExpressionFields() {\r
  79         return Arrays.asList(this.expression);\r
  80     }\r
  81 \r
  82     @Override\r
  83     public void readData(final Resource expression, Map<String, Object> data) {\r
  84         String equation = null;\r
  85         if (expression != null && data.get("equation") == null) {\r
  86             try {\r
  87                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  88 \r
  89                     @Override\r
  90                     public String perform(ReadGraph graph) throws DatabaseException {\r
  91                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  92                         if (expression != null) {\r
  93                             String equation = graph.getPossibleRelatedValue(expression, sr.HasEquation);\r
  94                             if(equation != null)\r
  95                                 return equation;\r
  96                         }\r
  97                         \r
  98                         return "";\r
  99                         \r
 100                     }\r
 101 \r
 102                 });\r
 103             } catch (DatabaseException e1) {\r
 104                 e1.printStackTrace();\r
 105             }\r
 106             data.put("equation", equation);\r
 107         }\r
 108     }\r
 109 \r
 110     @Override\r
 111     public void replaceSelection(String var) {\r
 112         if(expression != null) {\r
 113             IDocument doc = expression.getDocument();\r
 114             try {\r
 115                 Point selection = expression.getSelection();\r
 116                 doc.replace(selection.x, selection.y, var);\r
 117                 expression.setSelection(selection.x + var.length());\r
 118             } catch (BadLocationException e) {\r
 119                 e.printStackTrace();\r
 120             }\r
 121         }\r
 122     }\r
 123 \r
 124     @Override\r
 125     public void save(final Resource expression, Map<String, Object> data) {\r
 126         final String currentText = this.expression.getExpression();\r
 127         final String oldEquation = (String)data.get("equation");\r
 128         if(oldEquation == null || \r
 129                 (currentText != null && expressionType != null)) {\r
 130             data.put("equation", currentText);\r
 131             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 132                 @Override\r
 133                 public void perform(WriteGraph g)\r
 134                 throws DatabaseException {\r
 135                     SysdynResource sr = SysdynResource.getInstance(g);\r
 136                     Layer0 l0 = Layer0.getInstance(g);\r
 137 \r
 138                     // Force change to parameter, if the equation is a parameter\r
 139                     if(ExpressionUtils.isParameter(currentText)) {\r
 140                         if(!expressionType.equals(sr.ConstantExpression))\r
 141                                 expressionType = sr.ParameterExpression;\r
 142                     } else {\r
 143                         expressionType = sr.NormalExpression;\r
 144                     }\r
 145                     \r
 146                     // If nothing has changed, do nothing\r
 147                     if (oldEquation != null \r
 148                             && expression != null \r
 149                             && g.isInstanceOf(expression, expressionType) \r
 150                             && currentText.equals(oldEquation)) {\r
 151                         return;\r
 152                     }\r
 153                     \r
 154                     // If the current expression type is different than the target expression type, create a new expression\r
 155                     if(!g.isInstanceOf(expression, expressionType)) {\r
 156                         Collection<Resource> ownerLists = OrderedSetUtils.getOwnerLists(g, expression, l0.OrderedSet);\r
 157                         if(ownerLists.size() != 1)\r
 158                             return;\r
 159                         Resource ownerList = ownerLists.iterator().next();\r
 160                         final Resource newExpression = GraphUtils.create2(g, expressionType, \r
 161                                         sr.HasEquation, currentText);\r
 162                         String arrayRange = g.getPossibleRelatedValue(expression, sr.HasArrayRange, Bindings.STRING);\r
 163                         if(arrayRange != null)\r
 164                                 g.claimLiteral(newExpression, sr.HasArrayRange, arrayRange);\r
 165                         \r
 166                         final Resource variable = g.getSingleObject(ownerList, sr.HasExpressions_Inverse);\r
 167                         OrderedSetUtils.replace(g, ownerList, expression, newExpression);\r
 168                         g.deny(expression, l0.PartOf);\r
 169                         g.claim(newExpression, l0.PartOf, variable);\r
 170                         \r
 171                         \r
 172                                                 VirtualGraph runtime = g.getService(VirtualGraph.class);\r
 173                                                 g.syncRequest(new WriteRequest(runtime) {\r
 174                                                         @Override\r
 175                                                         public void perform(WriteGraph graph) throws DatabaseException {\r
 176                                                                 SysdynResource sr = SysdynResource.getInstance(graph);\r
 177                                                                 if(variable != null) {\r
 178                                                                         if(graph.hasStatement(variable, sr.HasActiveExpression))\r
 179                                                                                 graph.deny(variable, sr.HasActiveExpression);\r
 180                                                                         graph.claim(variable, sr.HasActiveExpression, newExpression);\r
 181                                                                 }\r
 182                                                         }\r
 183                                                 }\r
 184                                                 );\r
 185                     } else {\r
 186                         // Claim value for the expression\r
 187                         g.claimLiteral(expression, sr.HasEquation, currentText);\r
 188                     }\r
 189                 }\r
 190 \r
 191             });\r
 192         }\r
 193     }\r
 194 \r
 195     @Override\r
 196     public void updateData(Map<String, Object> data) {\r
 197         if(this.expression != null && this.expression.getExpression() != null)\r
 198             data.put("equation", this.expression.getExpression());\r
 199     }\r
 200 \r
 201     @Override\r
 202     public void addKeyListener(KeyListener listener) {\r
 203         this.expression.getSourceViewer().getTextWidget().addKeyListener(listener);\r
 204 \r
 205     }\r
 206 \r
 207     @Override\r
 208     public void addModifyListener(ModifyListener listener) {\r
 209         this.expression.getSourceViewer().getTextWidget().addModifyListener(listener);\r
 210 \r
 211     }\r
 212 \r
 213     @Override\r
 214     public void addFocusListener(FocusListener listener) {\r
 215         this.expression.getSourceViewer().getTextWidget().addFocusListener(listener);\r
 216     }\r
 217 \r
 218         @Override\r
 219         public void addVerifyKeyListener(VerifyKeyListener listener) {\r
 220                 this.expression.getSourceViewer().getTextWidget().addVerifyKeyListener(listener);\r
 221         }\r
 222 }\r