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

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