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.CommentMetadata;\r
  36 import org.simantics.db.common.request.WriteRequest;\r
  37 import org.simantics.db.common.utils.ListUtils;\r
  38 import org.simantics.db.exception.DatabaseException;\r
  39 import org.simantics.db.request.Read;\r
  40 import org.simantics.db.service.VirtualGraphSupport;\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     protected ExpressionWidgetInput input;\r
  58     \r
  59     public BasicExpression(ExpressionWidgetInput input) {\r
  60         this.input = input;\r
  61     }\r
  62     \r
  63     @Override\r
  64     public void createExpressionFields(Composite parent, Map<String, Object> data, Table allowedVariables) {\r
  65         // Create the single field\r
  66         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parent);\r
  67         String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  68 \r
  69         Label l = new Label(parent, SWT.NONE);\r
  70         l.setText("=");\r
  71 \r
  72         expression = new ExpressionField(parent, SWT.BORDER, null, false, input);\r
  73         expression.setExpression(equation);\r
  74         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  75 \r
  76     }\r
  77 \r
  78     @Override\r
  79     public void focus() {\r
  80         this.expression.focus();\r
  81 \r
  82     }\r
  83 \r
  84     @Override\r
  85     public List<ExpressionField> getExpressionFields() {\r
  86         return Arrays.asList(this.expression);\r
  87     }\r
  88 \r
  89     @Override\r
  90     public void readData(final Resource expression, Map<String, Object> data) {\r
  91         String equation = null;\r
  92         if (expression != null && data.get("equation") == null) {\r
  93             try {\r
  94                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  95 \r
  96                     @Override\r
  97                     public String perform(ReadGraph graph) throws DatabaseException {\r
  98                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  99                         if (expression != null) {\r
 100                             String equation = graph.getPossibleRelatedValue(expression, sr.Expression_equation);\r
 101                             if(equation != null)\r
 102                                 return equation;\r
 103                         }\r
 104                         \r
 105                         return "";\r
 106                         \r
 107                     }\r
 108 \r
 109                 });\r
 110             } catch (DatabaseException e1) {\r
 111                 e1.printStackTrace();\r
 112             }\r
 113             data.put("equation", equation);\r
 114         }\r
 115     }\r
 116 \r
 117     @Override\r
 118     public void replaceSelection(String var) {\r
 119         if(expression != null) {\r
 120             IDocument doc = expression.getDocument();\r
 121             try {\r
 122                 Point selection = expression.getSelection();\r
 123                 doc.replace(selection.x, selection.y, var);\r
 124                 expression.setSelection(selection.x + var.length());\r
 125             } catch (BadLocationException e) {\r
 126                 e.printStackTrace();\r
 127             }\r
 128         }\r
 129     }\r
 130 \r
 131     @Override\r
 132     public void save(final Resource expression, Map<String, Object> data) {\r
 133         final String currentText = this.expression.getExpression();\r
 134         final String oldEquation = (String)data.get("equation");\r
 135 \r
 136         if(oldEquation == null || \r
 137                 (currentText != null && expressionType != null)) {\r
 138             data.put("equation", currentText);\r
 139             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 140                 @Override\r
 141                 public void perform(WriteGraph g)\r
 142                 throws DatabaseException {\r
 143                     SysdynResource sr = SysdynResource.getInstance(g);\r
 144                     Layer0 l0 = Layer0.getInstance(g);\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                     // Force change to parameter, if the equation is a parameter\r
 155                     if(ExpressionUtils.isParameter(currentText)) {\r
 156                         if(!expressionType.equals(sr.ConstantExpression))\r
 157                                 expressionType = sr.ParameterExpression;\r
 158                     } else {\r
 159                         expressionType = sr.NormalExpression;\r
 160                     }\r
 161                     \r
 162                     g.startUndoContext();\r
 163                                 CommentMetadata cm = g.getMetadata(CommentMetadata.class);\r
 164                                 g.addMetadata(cm.add("Set equation"));\r
 165 \r
 166                     // If the current expression type is different than the target expression type, create a new expression\r
 167                     if(!g.isInstanceOf(expression, expressionType)) {\r
 168 \r
 169                         final Resource newExpression = GraphUtils.create2(g, expressionType, \r
 170                                         sr.Expression_equation, currentText);\r
 171                         String arrayRange = g.getPossibleRelatedValue(expression, sr.Expression_arrayRange, Bindings.STRING);\r
 172                         if(arrayRange != null)\r
 173                                 g.claimLiteral(newExpression, sr.Expression_arrayRange, arrayRange);\r
 174                         \r
 175                         final Resource variable = g.getPossibleObject(expression, l0.PartOf);\r
 176                         if(variable == null)\r
 177                             return;\r
 178                         Resource ownerList = g.getPossibleObject(variable, sr.Variable_expressionList);\r
 179                         if(ownerList == null)\r
 180                             return;\r
 181                         \r
 182                         ListUtils.replace(g, ownerList, expression, newExpression);\r
 183                         \r
 184                         g.deny(expression, l0.PartOf);\r
 185                         \r
 186                         g.claim(newExpression, l0.PartOf, variable);\r
 187                         \r
 188                         \r
 189                         VirtualGraphSupport support = g.getService(VirtualGraphSupport.class);\r
 190                                                 g.syncRequest(new WriteRequest(support.getWorkspacePersistent("expressions")) {\r
 191                                                         @Override\r
 192                                                         public void perform(WriteGraph graph) throws DatabaseException {\r
 193                                                                 SysdynResource sr = SysdynResource.getInstance(graph);\r
 194                                                                 if(variable != null) {\r
 195                                                                         if(graph.hasStatement(variable, sr.IndependentVariable_activeExpression))\r
 196                                                                                 graph.deny(variable, sr.IndependentVariable_activeExpression);\r
 197                                                                         graph.claim(variable, sr.IndependentVariable_activeExpression, newExpression);\r
 198                                                                 }\r
 199                                                         }\r
 200                                                 }\r
 201                                                 );\r
 202                     } else {\r
 203                         // Claim value for the expression\r
 204                         g.claimLiteral(expression, sr.Expression_equation, currentText);\r
 205                     }\r
 206                 }\r
 207 \r
 208             });\r
 209         }\r
 210     }\r
 211 \r
 212     @Override\r
 213     public void updateData(Map<String, Object> data) {\r
 214         if(this.expression != null && this.expression.getExpression() != null)\r
 215             data.put("equation", this.expression.getExpression());\r
 216     }\r
 217 \r
 218     @Override\r
 219     public void addKeyListener(KeyListener listener) {\r
 220         this.expression.getSourceViewer().getTextWidget().addKeyListener(listener);\r
 221 \r
 222     }\r
 223 \r
 224     @Override\r
 225     public void addModifyListener(ModifyListener listener) {\r
 226         this.expression.getSourceViewer().getTextWidget().addModifyListener(listener);\r
 227 \r
 228     }\r
 229 \r
 230     @Override\r
 231     public void addFocusListener(FocusListener listener) {\r
 232         this.expression.getSourceViewer().getTextWidget().addFocusListener(listener);\r
 233     }\r
 234 \r
 235         @Override\r
 236         public void addVerifyKeyListener(VerifyKeyListener listener) {\r
 237                 this.expression.getSourceViewer().getTextWidget().addVerifyKeyListener(listener);\r
 238         }\r
 239 }\r