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