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