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

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