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.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.simantics.db.Builtins;\r
  31 import org.simantics.db.ReadGraph;\r
  32 import org.simantics.db.Resource;\r
  33 import org.simantics.db.WriteGraph;\r
  34 import org.simantics.db.common.request.WriteRequest;\r
  35 import org.simantics.db.exception.DatabaseException;\r
  36 import org.simantics.db.request.Read;\r
  37 import org.simantics.sysdyn.SysdynResource;\r
  38 import org.simantics.ui.SimanticsUI;\r
  39 \r
  40 public class BasicExpression implements IExpression {\r
  41 \r
  42     private ExpressionField expression;\r
  43     protected Resource expressionType;\r
  44 \r
  45     @Override\r
  46     public void createExpressionFields(Composite parent, Map<String, Object> data) {\r
  47         GridLayoutFactory.fillDefaults().numColumns(2).applyTo(parent);\r
  48         String equation = data.get("equation") != null ? (String)data.get("equation") : "";\r
  49 \r
  50         Label l = new Label(parent, SWT.NONE);\r
  51         l.setText("=");\r
  52 \r
  53         expression = new ExpressionField(parent, SWT.BORDER);\r
  54         expression.setExpression(equation);\r
  55         GridDataFactory.fillDefaults().grab(true, true).applyTo(expression);\r
  56 \r
  57     }\r
  58 \r
  59     @Override\r
  60     public void focus() {\r
  61         this.expression.focus();\r
  62 \r
  63     }\r
  64 \r
  65     @Override\r
  66     public List<ExpressionField> getExpressionFields() {\r
  67         return Arrays.asList(this.expression);\r
  68     }\r
  69 \r
  70     @Override\r
  71     public void readData(final Resource variable, Map<String, Object> data) {\r
  72         String equation = null;\r
  73         if (variable != null && data.get("equation") == null) {\r
  74             try {\r
  75                 equation = SimanticsUI.getSession().syncRequest(new Read<String>() {\r
  76 \r
  77                     @Override\r
  78                     public String perform(ReadGraph graph) throws DatabaseException {\r
  79                         SysdynResource sr = SysdynResource.getInstance(graph);\r
  80                         Resource expression = graph.getPossibleObject(variable, sr.HasExpression);\r
  81                         if (expression != null) {\r
  82                             String equation = graph.getPossibleRelatedValue(expression, sr.HasEquation);\r
  83                             if(equation != null)\r
  84                                 return equation;\r
  85                         }\r
  86                         \r
  87                         return "";\r
  88                         \r
  89                     }\r
  90 \r
  91                 });\r
  92             } catch (DatabaseException e1) {\r
  93                 e1.printStackTrace();\r
  94             }\r
  95             data.put("equation", equation);\r
  96         }\r
  97     }\r
  98 \r
  99     @Override\r
 100     public void replaceSelection(String var) {\r
 101         if(expression != null) {\r
 102             IDocument doc = expression.getDocument();\r
 103             try {\r
 104                 Point selection = expression.getSelection();\r
 105                 doc.replace(selection.x, selection.y, var);\r
 106                 expression.setSelection(selection.x + var.length());\r
 107             } catch (BadLocationException e) {\r
 108                 e.printStackTrace();\r
 109             }\r
 110         }\r
 111     }\r
 112 \r
 113     @Override\r
 114     public void save(final Resource variable, Map<String, Object> data) {\r
 115         final String currentText = expression.getExpression();\r
 116         final String oldEquation = (String)data.get("equation");\r
 117         if(oldEquation == null || \r
 118                 (currentText != null && expressionType != null)) {\r
 119             data.put("equation", currentText);\r
 120             SimanticsUI.getSession().asyncRequest(new WriteRequest() {\r
 121                 @Override\r
 122                 public void perform(WriteGraph g)\r
 123                 throws DatabaseException {\r
 124                     SysdynResource sr = SysdynResource.getInstance(g);\r
 125                     Resource expression = g.getPossibleObject(variable, sr.HasExpression);\r
 126                     if(ExpressionUtils.isParameter(currentText)) {\r
 127                         if(!expressionType.equals(sr.ConstantExpression))\r
 128                                 expressionType = sr.ParameterExpression;\r
 129                     } else {\r
 130                         expressionType = sr.NormalExpression;\r
 131                     }\r
 132                     if (oldEquation != null \r
 133                             && expression != null \r
 134                             && g.isInstanceOf(expression, expressionType) \r
 135                             && currentText.equals(oldEquation)) {\r
 136                         return;\r
 137                     }\r
 138                     Builtins b = g.getBuiltins();\r
 139                     if(expression != null && !g.isInstanceOf(expression, expressionType)) {\r
 140                         g.deny(variable, sr.HasExpression);\r
 141                         expression = null;\r
 142                     }\r
 143                     if(expression == null) {\r
 144                         expression = g.newResource();\r
 145                         g.claim(expression, b.InstanceOf, null, expressionType);\r
 146                         g.claim(variable, sr.HasExpression, expression);\r
 147                     }\r
 148                     g.claimLiteral(expression, sr.HasEquation, currentText);\r
 149                 }\r
 150 \r
 151             });\r
 152         }\r
 153     }\r
 154 \r
 155     @Override\r
 156     public void updateData(Map<String, Object> data) {\r
 157         if(this.expression != null && this.expression.getExpression() != null)\r
 158             data.put("equation", this.expression.getExpression());\r
 159     }\r
 160 \r
 161     @Override\r
 162     public void addKeyListener(KeyListener listener) {\r
 163         this.expression.getSourceViewer().getTextWidget().addKeyListener(listener);\r
 164 \r
 165     }\r
 166 \r
 167     @Override\r
 168     public void addModifyListener(ModifyListener listener) {\r
 169         this.expression.getSourceViewer().getTextWidget().addModifyListener(listener);\r
 170 \r
 171     }\r
 172 \r
 173     @Override\r
 174     public void addFocusListener(FocusListener listener) {\r
 175         this.expression.getSourceViewer().getTextWidget().addFocusListener(listener);\r
 176     }\r
 177 \r
 178         @Override\r
 179         public void addVerifyKeyListener(VerifyKeyListener listener) {\r
 180                 this.expression.getSourceViewer().getTextWidget().addVerifyKeyListener(listener);\r
 181         }\r
 182 }\r